Glitter Mold Technology Co., Ltd

The Difference Between Die Casting Mold and Plastic Mold(2023年06月16日)

gmmoldtech — 2023-06-16T11:19:59+0900

https://www.gmmoldtech.com/the-difference-between-die-casting-mold-and-plastic-mold.html

The Difference Between Die Casting Mold and Plastic Mold
The structure of the die casting mold is actually the same as the structure of the plastic mold. It should be said that if you can make a plastic mold, you should be able to make a die casting mold.

Ⅰ. The main difference between mold and die
It is on the sprue sleeve of the feed. The sprue sleeve of the plastic mold tech china is a slender and tapered feeding port, and the diameter of the feeding port is relatively small. The feed port of the die casting mold is relatively large, and the diameter of the tapered feed port of the center feed is much larger than that of the plastic mold.

There is also a feed port that is a straight circular sleeve with a diameter of 30 to 40 mm, which is a structure that plastic molds do not have. In addition, plastic molds and die casting molds are made of different steels. Plastic molds generally use 45# steel, T8, T10 and other steels, while die casting molds mainly use heat-resistant steels such as 3Cr2W8V.

Ⅱ. Differences between die casting mold and plastic mold

1. The injection pressure of the die-casting mold is large, so the template is required to be relatively thicker to prevent deformation.

2. The gate of the die casting mold is different from that of the high quality injection mold, and a high pressure of the split cone is required to decompose the flow.

3. The die casting mold core does not need quenching. During die casting, the temperature in the mold cavity exceeds 700 degrees, so each molding is equivalent to quenching once. The mold cavity will become harder and harder, and the general injection mold should be quenched to above HRC52.

4. The general cavity of the die casting mold should be nitrided to prevent the alloy from sticking to the cavity.

5. Generally, the die casting mold of die casting mould supplier is relatively corroded, and the outer surface is generally blued.

6. Compared with the injection mold, the matching clearance of the movable part (such as the core-pulling slider) of the die casting mold is larger, because the high temperature of the die casting process will cause thermal expansion. If the gap is too small, the mold will be stuck.

7. The parting surface of the die casting mold has higher requirements, because the fluidity of the alloy is much better than that of the plastic. It will be very dangerous if the high temperature and high pressure material flows out of the parting surface.

8. The injection mold is generally exhausted by the thimble, the parting surface, etc. The die casting mold must have an exhaust groove and a slag collection bag (collect the cold material head).

9. The molding is inconsistent. The injection speed of the die casting mold is fast, and the injection pressure is one stage. Plastic molds are usually injected in several stages and kept under pressure.

10. The die casting mold is a two-plate mold (I haven't seen a 3-plate die casting mold for a while) to open the mold at one time. Different plastic molds have different product structures. Three-plate molds are common. The number and sequence of mold openings are matched with the mold structure. Die casting molds usually do not use square thimbles, cylinders, and inclined pins (high temperature and good fluidity of the solution), which are easy to get stuck and lead to unstable mold production.

In addition, plastic molds and die casting molds are made of different steels. Plastic molds generally use 45# steel, T8, T10 and other steels, while die casting molds mainly use heat-resistant steels such as 3Cr2W8V.

If you want to know more details of mold tech china, please visit our website.

Mould Slide(2023年06月16日)

gmmoldtech — 2023-06-16T11:19:22+0900

https://www.gmmoldtech.com/products/mould-slide.html

The slider is a mold component that can slide in a certain angle perpendicular to or with the opening and closing direction during the opening and closing action of the mold.

Features of Slide Mould
When the product structure makes it impossible for the mold to demould normally without the slider, the slider, the injection molding machine component, must be used. The material itself has appropriate hardness, wear resistance, enough to withstand the friction of the movement. The hardness of the cavity part or core part on the mould slider should be the same level as other parts of the cavity and core.

The Specification of Injection Molding Slide

Part nameslider
Part material1.2343
Mold accuracy+ / - 0.015
Dimension detection methodCMM
Surface treatmentEDM
Exporting countryGermany
Delivery time2 weeks
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

As a china injection moulding company, we will do our best to meet all the needs of customers.

If you want to know more details of mold tech china, please visit our website.

China Injection Mold Design Services(2023年06月16日)

gmmoldtech — 2023-06-16T11:18:47+0900

https://www.gmmoldtech.com/products/mould-design.html

GM-TECH have a much experienced china mold design services team, familiar with China domestic, European, American, Japanese and other mold design standards, be able to use all kinds of software skillfully for mold and product designing.

Features of China Injection Mold Design Services
There are more than 10 engineers who have much experience in plastic part design for injection molding:

GM-TECH have got a set of mature design process, from parts analysis, mold flow, structural analysis to process analysis.

Use full 3D mould design services, With the design ability, can design more than 20 sets of complex molds monthly.

Specification of China Injection Mold Design Services
Emphasizesthe importance of early involvement in projects, designing and developing the product together with the customer.

Preparation of prototype part tools or SLA samples for pre-testing production conditionsof products.

Optimizethe mold structure design ingand cooling system

DFM, Mould-flowanalysis

UG, Pro-E, AutoCAD, CAE, CAM

Designers: Average Working Experience: 12 years

Custom Plastic China Injection Mold Design Services
Custom plastic injection mold has provided solutions to mass production of various parts and components such as household mould, medical mould, electronics mold, home appliance mould, etc. This personalized injection moulding design gives you a high level of production while minimizing the cost per unit. GM-TECH, an certified injection mould design company, has earned a high reputation for a professional mould design services for manufacturing injection molding. We offer you high-quality, low-cost products and mold design services as follow:

In-house plastic injection mould design and engineering with professional guidance through every step of the process.

Our mold makers have rich experience with custom plastic mould design services and tooling.

Quality-controlled experts are in a wide variety of capabilities, materials, and sizes in terms of plastic injection mould design services.

If you want to know more details of mold tech china, please visit our website.

Household&Home Appliance Mould(2023年06月16日)

gmmoldtech — 2023-06-16T11:18:14+0900

https://www.gmmoldtech.com/products/home-appliance-mould.html

Home appliance mould combines different types of molds such as gold stamping mould, plastic mould, and adsorption mould together. Therefore, household appliances are closely related to home appliance mold.

As a leading home appliance plastic molding manufacturer, GM-TECH makes sure all the products made by moulding meet the demanding requirements of our customers. We are devoted ourselves improving the service and home appliance mould quality continuously.

Features of Home Appliance Mould
With the development of the home appliance industry, applications of home appliance mold are popular in the injection process such as fan mould, computer mould, air conditioner mould, refrigerator mould, and so on. So why are there wide applications of home appliance mold?

High precision and long service life

The home appliance mould adopts an inlaid or fully assembled structure, improving the high processing accuracy of plastic injection moulding parts.

Off-site design and off-site processing

The plastic home appliance mold process requires to meet customer needs and provide mass production by off-site mould design services and off-site processing.

Short processing time

For home appliance plastic parts, most of them are matched with other precision injection molding types, which can save processing time.

The Specification of Home Appliance Mould
High precision mould
Part materialPBT
Cavity1L + 1R
Mould accuracy+ / - 0.02
Mould steel1.2343
Mouldbase steel1.173
Mould life100W
Mould standardHASCO
Mould structure4 slides
Exporting countryRussia
Leadtime6 weeks
Mould quality customer satisfaction96%
FAI pass rate98%
Project cooperation service customer satisfaction99%

How does Home Appliance Mould Work?

Before we explore the working principle of home appliance mould, the first stage is to make a mould. Then the material is fed into a heated barrel and mixed using a helical-shaped screw.

Heating bands make the material melt. Next, the mixed materials, generally metal and plastic, are fed to the cavity of the home appliance mould to keep cooling. Finally, the shape of the home appliance mould is formed as we designed.

If you want to know more details of mold tech china, please visit our website.

2k Injection Molding Factory(2023年06月16日)

gmmoldtech — 2023-06-16T11:17:18+0900

https://www.gmmoldtech.com/products/2k-mould.html

2k injection molding in china is a manufacturing process that refers to molding two materials or colors into one plastic part.

This technology combines two materials or two colors into one ending plastic part by using a 2K automotive plastic injection moulding machine. The selection of the 2K moulding process is generally according to cost and customization considerations.

Features of 2K Injection Moulding Technology
Physical appearance

The physical appearance of 2K injection molding about aesthetic value or beauty is high as many colors can be blended in the molding stages.

Cost-efficiency

Because all 2K injection molding manufacturing procedures are finished in the injection stage, it can save plastic injection molding cost and lower the labor and material fees.

Customization

We can provide custom-made plastic injection molding products, such as parts&products from appliance plastic molding and screw thread mould to meet your demanding need. It is possible to finish the products with 2K plastic injection moulding with softer edges.

Specification from 2k molding suppliers

Part materialPC + ABS
Cavity1L + 1R
Mold accuracy+ / - 0.01
Mold steel1.2343
Moldbase steel1.173
Mold life100W
Mold standardHASCO
Mold structure6 lifters
Exporting countryGermany
Delivery time4 weeks
Mold quality customer satisfaction98%
FAI pass rate96%
Project cooperation service customer satisfaction98%

How does 2k Moulding Process Work?

Since there are a lot of benefits of 2K injection molding, can I learn more about the working principle of 2k mould?

2K injection moulding operates in one machine which is programmed to perform two injections in one cycle. In the first cycle, a nozzle injects plastic into a mold. The 2K plastic injection moulding is then rotated automatically and another type of plastic is injected from a second nozzle into the mold. When using the 2k injection molding technology process with mould design services, material selection is very important to the injection.

If you want to know more details of mold tech china, please visit our website.

What Are the Main Methods of Forming Automotive Plastic Molds?(2023年05月07日)

gmmoldtech — 2023-04-23T12:21:34+0900

https://www.gmmoldtech.com/what-are-the-main-methods-of-forming-automotive-plastic-molds.html

There are many ways to classify automotive plastic molds. According to the different methods of forming and processing plastic parts, they can be divided into the following categories:

1. Plastic injection molding for automotive plastic mould
The characteristic of plastic high quality injection mold and molding is that the plastic raw material is placed in the heating barrel of the injection molding machine. The plastic is melted by heat, driven by the screw or plunger of the injection molding machine, enters the mold cavity through the nozzle and the pouring system of the mold, and the plastic is formed by heat preservation, pressure retention, and cooling in the mold cavity. Since the heating and pressing device can function in stages, injection molding can not only form plastic parts with complex shapes, but also has high production efficiency and good quality. Therefore, the injection mold occupies more than half of the proportion in the molding of plastic parts. Injection molding machines are mainly used for the molding of thermoplastics, and in recent years have gradually been used for the molding of thermoset plastics.

2. Compression molding for automotive plastic mould
The characteristic of the molding process of this automotive plastic mould is that the plastic raw material is directly added into the open mold cavity, and then the mold is closed. After the plastic is in a molten state under the action of high temperature and pressure, the cavity is filled with a certain pressure. At this time, the molecular structure of the plastic has a chemical cross-linking reaction, which gradually hardens and sets. Compression molds are mostly used for thermosetting plastics, and their molded plastic parts are mostly used for the shells of electrical switches and daily necessities, such as home appliance mold with GM-Tech home appliance plastic parts by injection molding services.

3. Transfer moulding for automotive mold technology
The characteristic of the molding process of this automotive injection mold is that the plastic raw materials are added into the preheated feeding chamber, and then pressure is applied to the plastic raw materials in the feeding chamber by the pressure column. The plastic is melted under high temperature and high pressure and enters the cavity through the casting system of the mold. And then the chemical cross-linking reaction occurs and gradually solidified into shape. The transfer molding process is mostly used for thermosetting plastics, which can form plastic parts with more complex shapes.

4. Extrusion for automotive plastic mould
This automotive plastic mould can continuously produce plastics with the same cross-sectional shape, such as plastic pipes, rods, and sheets. The heating and pressurizing device of the extruder is the same as that of the injection molding machine. The plastic in the molten state will form a continuous molded plastic part through the machine head, and the production efficiency is particularly high.

In addition to the several types of plastic molds listed above, automotive plastic mould molding processes include vacuum molding molds, compressed air molds, blow molding molds and low-foaming plastic molds.

As a plastic mold technology company, we will do our best to meet all the needs of customers.

What Are the Common Products Made by Injection Molding in Our Life?(2023年05月06日)

gmmoldtech — 2023-04-23T12:20:57+0900

https://www.gmmoldtech.com/what-are-the-common-products-made-by-injection-molding-in-our-life.html

In fact, all products molded by injection molding machines are injection molded products. Including thermoplastic and now some thermosetting injection products. The most notable feature of thermoplastic products is that the raw materials can be re-injected, but some of the physical and chemical properties of the raw materials will be reduced. So usually high-end products made by injection molding will not use raw materials again.

1. Products made by injection molding in the medical industry

At present, the medical industry has a wide range of products made by injection molding, such as high-transparent PPT droppers, electronic thermometer shells, sprayer shell injection molded parts, laser writing instrument medical hands, physiotherapy hot compress spine neck protector plastic shells, medical sharp weapon boxes, and medical virus detector shells, shells of oral X-ray film machines.

2. Products of precision injection molding in the home appliance industry

The plastic injection moulding products that are commonly used in our lives , such as home appliance plastic parts are small hand-held fans, humidifier shells, heater shells, hand warmers, mixers, rice cooker shells, air conditioner shells, TV shells, hairdryer shells, water heater shells, and so on. Bulk inquiry appliance plastic molding from GM-Tech

3. Products of precision injection molding in the cosmetic packaging industry

In the past, many cosmetic packaging materials were made of glass materials. The main disadvantages are that the materials are too heavy, easy to break, and the price is relatively expensive. Now, glass materials are gradually replaced with common injection molded plastic materials, which occupy 90% of the cosmetic packaging materials.

Common products include dozens of lipstick tubes, powder boxes, lip glaze tubes, eyebrow pencils, cream tubes, lip gloss tubes, sub-bottles.

As a plastic mold technology inc, we will do our best to meet all the needs of customers.

What Are the Classification of Injection Mold Processing?(2023年05月05日)

gmmoldtech — 2023-04-23T12:20:29+0900

https://www.gmmoldtech.com/what-are-the-classification-of-injection-mold-processing.html

Ⅰ. The plastic injection mold processing
Injection molding is a relatively common manufacturing method of industrial products in machining processing. This processing technology obtains the required shape by processing rubber and plastic. There are many types of injection mold processing. In the process of processing, the processing technology should be selected according to the requirements of the injection product.

Ⅱ. The injection mold classification
1. Single parting surface injection mold

When the mold is opened, the movable mold and the fixed mold are separated, so that the plastic part is taken out, which is called a single parting surface mold. This processing method is the simplest of the plastic injection mold and molding. It can be divided into single-cavity injection molds or multi-cavity injection molds according to the design. It is widely used in today's production.

2. Double parting surface injection mold

Double parting surface injection molding has two parting surfaces. Compared with single parting surface injection molds, double parting surface injection molds have a movable intermediate plate in the fixed mold part, so this type of injection mold is called three-plate injection mold. It is most commonly used for single-cavity or multi-cavity molds with point gate feeding.

3. Injection mold with lateral parting and core pulling mechanism

When the plastic part has a side hole or a side depression, it needs to be formed with a core or slider that can move laterally. After injection molding, the movable mold will move down for a certain distance, and then the inclined surface of the bending pin fixed on the fixed template forces the slider to move outwards. At this time, the push rod of the ejection mechanism pushes the plastic part to take off from the core.

4. Injection mold with movable forming parts

Due to some special structures of plastic parts, injection molding will be required to be set into movable injection molded parts, such as movable punches, dies, movable inserts, movable threaded cores or shaped rings. During demolding, it can be moved out of the mold together with the plastic part and separated from the plastic part.

5. Automatic thread unloading injection mold

For plastic parts with threads, when automatic demolding is required, a freely rotatable thread core or ring can be set on the mold, and the mold opening action or the rotation mechanism of the injection molding machine can be used to drive the thread core or the threaded ring rotates and the plastic part comes out.

6. Runnerless injection mold

Runnerless injection mold refers to the method of adiabatic heating of the runner to keep the plastic between the nozzle and the cavity of the injection molding machine in a molten state, so that there is no condensate in the pouring system when the mold is opened and the plastic part is taken out.

7. The injection mold of the demoulding mechanism on the fixed mold

In the injection mold, the demolding device is installed on the side of the movable mold, which is of great help to the ejector device in the opening and closing system of the injection molding machine. In actual production, because of the shape limitation of some plastic parts, leaving the plastic parts on the side of the fixed mold is more helpful for forming.

If you want to know more applications of plastic mold technology, please visit our website.

Vacuum Moulding(2023年05月04日)

gmmoldtech — 2023-04-23T12:20:03+0900

https://www.gmmoldtech.com/products/vacuum-moulding.html

In order to meet the requirements of small batch production and material performance, we provide vacuum injection molding for customers.

Vacuum Moulding Plastic to the use of the original template to make a silica gel mold in the vacuum state, and pour it with PU material in the vacuum state, so as to clone the same replica as the original template.

This is similar to the processing method of custom plastic injection mould. Products can use any material, such as ABS, PC, PBT, PA66 and so on. But its disadvantage is that the product precision is low and the die life is short!

Features of Vacuum Moulding
GM-TECH, a professional plastic mold technology inc, has designed and manufactured dozens of sets of automobile rear-view mirror molds for Kaiming hall in Murakami, Japan. The products are basically used in Toyota, Honda, and Nissan. In addition, we have also produced dozens of sets of lamp molds for Haila, including headlamp mask, headlight guide strip, headlight reflector, etc.

1. The production cost of vacuum moulding plastic is low. In the rapid prototype making industry, vacuum silica gel mold is often used for small batch reproduction production;

2. The service life of silica gel mold can reproduce and produce 10-20 same hand board products;

3. Fast speed, general working time: 1-4 hours / piece;

4. Standard copy accuracy of the replica hand plate: ± 0.10mm/100mm;

5. According to customer requirements, we can make vacuum moulding plastic products with exquisite appearance according to different colors;

6. It is suitable for trial production samples with complex product structure, uniform wall thickness and meeting certain functional requirements.

The Specification of Vacuum Moulding
Part namesample, prototype,
Part materialplastic
Machining accuracy+ / - 0.1
Tool life20 shots
Exporting countryIsrael
Delivery time1 week
Delivery modeDHL3 days
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

Two Shot Injection Moulding(2023年05月03日)

gmmoldtech — 2023-04-23T12:19:36+0900

https://www.gmmoldtech.com/products/two-shots-moulding-part.html

Two Shot Injection Moulding, also known as dual-shot, multi-shot, allows engineers to create multi-material or multi-colored parts without other steps.

It is a kind of plastic raw materials of injection molded parts after the parts out, fed into the second mold again with the same or another plastic material molding process.

Features of Two Shot Injection Moulding
The soft surface

The two-shot injection molded parts can make the surface of the product full of soft, which can increase the functionality.

High product value

The two-shot custom plastic injection moulding by GM-TECH, a reliable injection mold components supplier, combines two or more materials with different characteristics to increase product value.

Versatile functions

The two-shot products made by the plastic injection mold and molding technique are known for being multifunctional. With this technology, two shot moulding parts are widely used in noise reduction, shock absorption, waterproofing, and so on.

Specification of Two Shot Injection Moulding
Part materialABS + TPU
Cavity1
Mould steelH 13
Mould steel1.173
Runner2 drops mold master
Mould life100W
Mould standardHASCO
Mould structure5 lifters
Exporting countryCanada
Leadtime5 weeks
Mould quality customer satisfaction98%
FAI pass rate99%
Project cooperation service customer satisfaction98%

How Does the Two Shot Injection Moulding Work?
In order to meet the special needs of many plastic products, injection-molded plastic parts manufacturers use two or more two kinds of plastic raw materials many times. In the two shot injection mold process, the covering material is injected above, below, around, or inside the substrate, and the material is combined into a complete part. This process of two shots of precision injection molding can be completed through multiple injections or embedded injection.

More details of mold technology, please visit our website.

Screw Thread Mould(2023年05月02日)

gmmoldtech — 2023-04-23T12:19:03+0900

https://www.gmmoldtech.com/products/screw-thread-mould.html

The screw thread plastic injection mould, a special part of the plastic injection molding process, is used for mass production of screw thread.

Nowadays, molded screw threads are everywhere -- on the cap of a Coca-Cola bottle, on the nut linking the drain pipe to the underside of the kitchen sink. So here comes a lot of screw thread plastic injection molding companies to perform the process of screw thread mould. GM-TECH, as a leading custom plastic injection molding company, will continuously spare efforts to produce high quality injection molds.

Features of Screw Thread Mould
Short cycle time

With plastic injection molding machine,the screw thread can be manufactured quickly.

Better maintenance

High precision injection molds of screw thread are tools requiring high maintenance. Everything must be timed, and that timing must be maintained to get the best productivity.

Low cost

Large plastic molds can be performed spontaneously to save the labor and material cost.

Fast ventilation

Usually the thread is formed in a blind pocket. Trapped gas will be vent out.

Mould design services

The Specification of Screw Thread Mould
Part materialPP
Cavity1
runnercold runner
Mold accuracy+ / - 0.02
Mold steel1.2343
Moldbase steel1.173
Mold life100W
Mold standardHASCO
Mold structure2 slides
Exporting countryItaly
Delivery time4 weeks
Mold quality customer satisfaction98%
FAI pass rate98%
Project cooperation service customer satisfaction95%

How does Screw Thread Mould Work?

There are four general steps to produce screw thread plastic injection mold.

Split tooling

Numerous screw-threaded parts are injection moulded by this step.

Thread jumping

This is the cheap plastic injection molding to produce screw thread molding product. It is very widely used for the manufacture of closure threads.

Collapsible coring

It is very convenient to manufacture common injection molded plastics.

Rotary unscrewing

Rotary unscrewing is used where split line witness cannot be tolerated or often when larger numbers of impressions are required.

If you are interested in mold technology, please leave us a message.

China Rapid Injection Molding Prototyping(2023年05月01日)

gmmoldtech — 2023-04-23T12:18:28+0900

https://www.gmmoldtech.com/products/prototype-moulding.html

China rapid injection molding prototyping technology is a fast, convenient and practical mold manufacturing technology. The characteristics of prototype mold making are: short molding cycle, simple process, easy popularization, low molding cost, precision and service life, which can meet a specific functional needs, and good comprehensive economic benefits.Prototype mold making is especially suitable for new product development and trial production, process verification and function verification, as well as multi variety and small batch production.

Due to the increasingly fierce market competition and the accelerating speed of product renewal, multi variety and small batch will become an important production mode in the manufacturing industry. In this case, the manufacturing industry puts forward strong requirements for the rapid manufacturing of product prototype and mold. Therefore, China rapid precision injection molding prototyping technology presents a vigorous development trend.

Features of China Rapid Prototype Moulding
GM-TECH, a professional manufacturer in prototype cnc machining, has designed and manufactured dozens of sets of automobile rear-view mirror molds for Kaiming hall in Murakami, Japan. The products are basically used in Toyota, Honda, and Nissan. In addition, we have also produced dozens of sets of lamp molds for Haila, including headlamp mask, headlight guide strip, headlight reflector, etc.

Prototype mold China life is very low, cost is cheap. In order to meet the requirements of small batch production and material performance, we provide prototype injection molding.

Generally, we use poor steel, such as aluminum, S50C and so on. The structure and production principle of rapid die are the same as plastic injection moulding products.

The Specification of China Rapid Prototype Mold Making

Mold NameExperimental mold
Part materialABS
Machining accuracy+ / - 0.02
Mold life1W shots
Exporting countryIsrael
Delivery time4 weeks
Delivery modeDHL 3 days
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

If you want to know more details of mold tech china, please visit our website.

General Principles of Injection Molding Mold Design(2023年03月24日)

gmmoldtech — 2023-03-02T15:39:00+0900

https://www.gmmoldtech.com/general-principles-of-injection-molding-mold-design.html

Ⅰ. Reasonable injection molding mold design

It is mainly reflected in the quality of the molded plastic products (appearance quality and dimensional stability); it is convenient, fast and concise in processing and manufacturing, that is, it saves money and manpower, leaving room for correction and improvement; it is safe, reliable and easy to maintain during use; In injection molding, it has a short molding cycle and a long service life, as well as a reasonable mold manufacturing process.

Ⅱ. The precision injection mold design should pay attention to several aspects:

1. When starting the mold design, you should pay more attention to consider several schemes, measure the advantages and disadvantages of each scheme, and choose one of them. For the T mold, it is also taken seriously. For reasons of time awareness, the design that was considered reasonable at that time must have areas that can be improved after production and use practice;

2. After handing over the design plan, it is necessary to communicate with the injection molding china factory more to understand the processing process and the situation in manufacturing and use. Each set of molds should have a fixed analysis experience, summing up the process of gain and loss, in order to continuously improve the level of injection molding mold design;

3. When designing, refer to similar drawings designed in the past, and learn from its experience and lessons;

4. The mold design department should be a whole, and each design member should not be on their own, especially in the summary of mold design, there must be a consistent style.

Ⅲ. Basis of injection molding mold design

The main basis is the product drawings and samples provided by customers. Designers must analyze and digest products and samples carefully and in detail. At the same time, during the design process, all items must be checked one by one.

1. The correctness of dimensions related to dimensional accuracy;

(1) For clinker products with high appearance requirements and low dimensional accuracy requirements, such as toys, the specific dimensions except for the transfer, the other dimensions only need to match well;

(2) For functional plastic products, the size requirements are strict and must be within the allowable tolerance range, otherwise the performance of the entire product will be affected;

(3) Products with strict requirements on appearance and size.

2. Whether the demoulding slope is reasonable;

3. Product wall thickness and uniformity;

4. Types of plastics;

5. Surface requirements;

6. Product color; (Generally, the color has no direct impact on the design of the injection mold. However, when the wall thickness of the product is large and the shape is large, it is easy to produce uneven color; and the darker the color, the more obvious product defects are exposed).

7. Whether there is post-processing after the product is formed; (if there is a product with electroplating on the surface, and one mold has multiple cavities, it must be considered to set up auxiliary flow channels to connect the products together, and then separate them after the electroplating process is completed).

8. The batch of products; (the batch of products is an important basis for mold design, and the customer must provide a range to determine the number of mold cavities, size, mold material selection and service life).

9. Specifications of injection molding machine;

10. Other requirements of customers. Designers must carefully consider and check to meet customer requirements.

Ⅳ. The general process of injection molding mold design

1. Analyze and digest products and samples;

2. It should be understood whether the customer has requirements for the specifications of the injection machine to determine the size range of the mold;

3. Determine and rank the number of cavities;

4. Determine the parting surface;

5. If there is a row position and a rhombus structure, it should be understood first;

6. Design of pouring system;

7. Determination of mosaic structure;

8. Ejection and reset system design;

9. Design of cooling and heating system;

10. Guiding and positioning device;

11. Determine the mold base and select standard parts;

12. Selection of mold steel;

13. Complete the structural drawing, mold embryo drawing, and material cutting;

14. Print out the drawing, check it, and submit it to the mold design team leader and supervisor.

If you want to know more applications of plastic mold technology, please contact us.

What Needs to Be Considered When Designing a Die Casting Mold?(2023年03月23日)

gmmoldtech — 2023-03-02T15:38:29+0900

https://www.gmmoldtech.com/products/die-casting.html

In addition to the basic requirements of normal design of die-casting molds, special consideration should also be given to:

1. The die casting mould china adopts a reasonable and advanced simple structure, so that the workpiece is accurate and reliable, and the rigidity of the structure is good, that is, the mold has enough thickness to ensure that it has enough rigidity to prevent the mold from deforming and cracking. At the same time, it is also necessary to consider the convenience of mold disassembly and replacement, which is beneficial to prolong the service life of the mold;

2. The parts on the die-casting mold should meet the requirements of the machining process and heat treatment process. Avoid or reduce sharp corners and thin walls as much as possible to facilitate subsequent heat treatment and prevent stress concentration. If the structure cannot avoid sharp corners, sufficient R corners should be reserved when roughing, and processed in place after heat treatment to avoid the risk of heat treatment cracking.

3. For large die-casting molds (the projected area of the parting surface is greater than 1 square meter), a square guide column guide system should be used to avoid the large difference in thermal expansion between the dynamic and fixed molds, resulting in a decrease in the guiding accuracy;

4. For the gating system, exhaust system and cooling system designed for large and complex die-casting molds, it is best to do flow analysis and heat balance analysis.

In this way, the position, angle and quantity of the runner system (sprue, runner, inner gate) and constant temperature preheating system will be reasonably arranged; In the cavity, it is closely related to the position, direction and flow state of the molten metal entering the cavity, and can adjust the filling conditions such as filling speed, filling time, and cavity temperature.

In die-casting production, the gating system also has a significant impact on the quality of die-casting parts, the efficiency of die-casting operations, the life of the mold (the erosion and corrosion of the mold cavity wall by the molten metal at high temperature, high pressure, and high speed, etc.), and the trimming and cleaning of the die-casting parts, it can be seen that the design of the gating system is extremely important for mold supplier;

5. Precautions for the design of the inner gate of the die-casting mold: the high-temperature molten metal entering the cavity from the inner gate should not enter the wall and core of the impact dynamic fixed model from the front to prevent early erosion, sticking and cracking of the cavity. and other phenomena; when using multiple inner gates, it is necessary to consider preventing the molten metal from entering the cavity and converging from several paths, colliding with each other to produce eddy currents, air entrainment and oxidation slag inclusions and other defects; the selection of the thickness of the inner gate is generally based on Based on empirical data, it is recommended to choose a larger size as far as possible under the conditions of mold filling, so as to avoid the impact of excessive injection speed, which may cause early erosion, sticking, pitting and cracking of the mold;

6. Design of die-casting mold overflow groove and exhaust groove: The function of the overflow groove is to accumulate the cooling metal liquid and the gas-coated liquid metal that first enter the cavity, and adjust the temperature of each part of the mold to improve the heat balance of the mold. Conducive to prolonging the service life of die-casting molds. It is generally set at the end of the molten metal process, and setting a suitable overflow tank can improve the filling conditions and improve the quality of castings.

The exhaust groove is used to discharge the air and the gas generated by the volatilization of the paint from the cavity, and the position of the exhaust groove is related to the position of the inner gate and the product structure. In order to discharge the molten metal from the die casting as much as possible when the gas in the cavity is injected, the exhaust groove is set at the position where the molten metal is last filled. The exhaust groove is generally combined with the overflow groove and arranged at the rear end of the overflow groove to enhance the overflow and exhaust effect.

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Precautions for Die-casting Production and Maintenance of Die-casting Molds(2023年03月22日)

gmmoldtech — 2023-03-02T15:37:57+0900

https://www.gmmoldtech.com/products/die-casting-mould.html

Ⅰ. Good preheating of die casting mold

After the mold is assembled for trial or normal production, the mold must be preheated and the mold temperature should be uniform. The preheating temperature of the die-casting mold of aluminum-magnesium alloy is recommended to be 250-320 °C, and it is best to use a mold temperature machine to preheat; the mold is preheated to 300 °C, and its impact toughness is improved rapidly, but when the mold temperature is lower than 200 °C, The impact toughness of the material is greatly reduced, and the brittleness is increased; the thermal conductivity of a well-preheated mold is nearly 20% higher than that of a mold without good preheating; the greater the difference between the casting temperature of the die casting mould and the mold surface temperature (preheating temperature), the greater the thermal stress, the easier it is to cause thermal fatigue and cracking.

Ⅱ. Formulate the correct pouring process for the die-casting mold

The pouring temperature should be reasonable and not too high. Otherwise, the pouring temperature is too high, although the fluidity is better, but the casting takes a long time to condense, and it is easy to produce shrinkage holes and pores, which is easy to reduce the surface hardness of the mold, and the mold sticks and cracks occur. Adjust the clamping force of the die-casting machine so that the mold is evenly stressed.

Correctly select (or adjust) the filling speed and filling pressure. Too high filling speed (injection speed) will increase the probability of damage to the surface of the cavity due to erosion and die sticking. Too low filling speed, although beneficial to gas discharge, will reduce the mechanical properties of the casting and deteriorate the surface quality. In the same way, the increase of the filling pressure will also increase the filling speed of the nozzle. In short, to adjust a moderate value.

Ⅲ. Choose the appropriate release agent and the correct spraying method for the die-casting mold

During die casting, the mold release agent should be sprayed on the surface of the cavity in contact with the metal solution. Its main function is to prevent the metal solution from adhering to the surface of the cavity and to ensure the separation of the casting and the mold wall, so as to prolong the life of the mold.

Release agents include water and oil. In recent years, powder and granular release agents have also been developed. Requirement: The release agent must not adversely affect the surface quality of the casting, no odor and smoke should occur, and no residue should be left behind.

The concentration of the release agent should be appropriate, and it should be stirred frequently, and it must not be allowed to settle, otherwise the die-casting mold cavity will cause thermal fatigue cracking due to extreme cold.

The amount of spraying should be small, the spraying should be uniform, and the film formed should be thin. Spraying too much and too thick will cause defects such as loose casting, slag inclusion, blistering, and pores.

If the spraying effect of water release agent is not good, oil release agent or powder release agent should be selected. But use it in a vacuum. Castings have fast demoulding, high productivity, good quality, and less thermal stress generated by the mold, which is beneficial to prolong the service life of the mold.

Ⅳ. The die-casting mold ensures the quality of the poured aluminum alloy

To ensure the composition of the aluminum alloy, the melting of the aluminum alloy and the heat preservation tank must be separated. In central smelting, the gas content should be strictly controlled, and it is absolutely necessary to avoid directly adding waste products and return materials to the holding furnace, otherwise it will pollute the molten metal, which will not only seriously reduce the quality of castings, but also easily cause mold sticking and corrosion of molds.

The content of Fe in the aluminum alloy solution should be controlled between 0.7% and 1.3%. If it is less than 0.7%, it is easy to cause sticking. If it is more than 1.3%, it will form metal compound hard spots and cause erosion.

Ⅴ. Establish a good die-casting mold maintenance system to keep the mold in good working condition:

1. Clean and clean the mold in time to remove cavity residue and flash;

2. Replace or repair damaged parts;

3. Regularly carry out stress relief treatment on the mold:

The first stress relief treatment is when the initial production mold is used for about 2000 to 5000 mold times;

The second stress relief treatment is when using 10,000 to 20,000 mold times;

The rest of the stress relief treatment interval is the same as above, and the maximum cannot exceed 15000 times.

4. After the die-casting mold has been used for a period of time, the hardness of the surface of the inspection mold has decreased. When the mold sticking phenomenon occurs, the surface of the mold should be ground and smooth, and a soft nitriding treatment should be performed. The thickness of the nitriding layer is 0.08 ~ 0.12mm, or soft nitrogen chemical + oxidation composite treatment, it will effectively improve the service life of the mold.

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Die Casting Mold(2023年03月16日)

gmmoldtech — 2023-03-02T15:37:20+0900

https://www.gmmoldtech.com/products/die-casting-mould.html

Heat treatment has a great impact on the service life of die-casting molds. According to relevant information, due to improper heat treatment, the early failure of die-casting molds accounts for about 44% of the entire die-casting mold accidents. The stress generated when the steel is quenched is actually the result of the superposition of the thermal stress during the cooling process and the structural stress during the phase transformation. After the steel is quenched, it is in a state of high stress and low toughness, with high hardness and strength, and is relatively brittle, which actually cannot be used. The quenching stress is the cause of deformation and cracking, and leads to the reduction of fatigue strength and impact toughness. For this reason, the steel must be tempered after quenching to remove stress, stabilize the structure and improve toughness.

Ⅰ. Stress relief annealing treatment before quenching of die casting mold

Due to the large internal stress generated during the machining of the mold, in order to prevent the superposition of the internal stress during the heat treatment and cause the deformation and cracking of the die casting mold, the mold is required to be subjected to a stress relief annealing treatment after machining and before quenching.

The annealing temperature is 600-650°C, and the holding time is calculated according to the thickness of each 25mm holding for 1 hour.

Ⅱ. Formulate a reasonable heat treatment process for die-casting molds

1. The quenching process adopts multi-stage preheating and strictly controls the heating rate

Compared with low alloy steel, medium carbon high alloy steel has poor thermal conductivity. Therefore, multi-stage preheating (2 to 3 stages) should be used for quenching heating, which is 300 ° C, 650 ° C, and 850 ° C preheating. At the same time, the heating rate should follow the principle of slow heating (100-200℃/h) to reduce the thermal stress generated during the heating process. In the high-temperature heating stage, a faster heating rate (10-15°C/h) can be used to shorten the high-temperature heating time and prevent coarse grains.

2. Prevent the workpiece from overheating

If the temperature in the heating stage exceeds the normal quenching temperature (including the failure of the instrument or the placement of the workpiece close to the heating element, etc.), with the increase of the quenching temperature and the extension of the holding time, the grains generally coarsen, the brittleness of the structure increases, and the residual austenite increases, the spherical carbide is transformed into a polygonal carbide, and there is a network structure, and the die-casting mold is prone to cracking during use.

3. Selection of quenching heating medium and cooling medium

In today's world, large and complex precision molds are mostly heat treated in vacuum or protective atmosphere to prevent oxidation and decarburization of the mold surface, especially the vacuum high-pressure air-cooled quenching process is widely used. However, it should be noted that the air cooling speed cannot be too low, then the pressure of nitrogen is required to be sufficient. Usually, the surface cooling rate of the workpiece is required to be greater than or equal to 28 °C/min during the process of cooling the workpiece from the quenching temperature (1020-1050 °C) to 538 °C. There are also requirements for the cooling rate of the workpiece core to be greater than or equal to 28°C/min.

If the cooling rate is too slow in this temperature range, carbides or other transformation products will be precipitated along the grain boundaries in the microstructure after quenching, thereby reducing the toughness of the steel, increasing the brittleness, and prematurely cracking during use. In addition, if conditions permit, graded isothermal quenching can be used for particularly complex large-scale die-casting molds, which can effectively reduce mold deformation and avoid cracking.

4. Tempering process

Temper in time after quenching. After quenching, the workpiece should be tempered immediately after cooling to 90 ~ 70 ℃, because the workpiece is in a state of high stress and low plasticity after quenching, which is easy to cause cracking; the tempering should be sufficient. After quenching of large and complex die-casting molds, it is usually tempered three times, and the tempering time for each time is calculated according to the effective thickness of the workpiece for 1 hour per 25mm, but not less than 4 hours. The purpose is to reduce tissue transformation stress and stabilize dimensions.

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The Influence of Machining on the Failure of Die Casting Dies(2023年03月15日)

gmmoldtech — 2023-03-02T15:36:45+0900

https://www.gmmoldtech.com/products/die-casting.html

As we all know, die-casting molds have a long manufacturing cycle and complex machining, involving processes such as turning, grinding, milling, drilling, planing, and electrical discharge machining (wire cutting, EDM).

Its processing quality, especially the processing quality of the surface, will significantly affect the fracture resistance, fatigue strength, thermal fatigue resistance, wear resistance, corrosion resistance, etc. of the mold in the mold manufacturing process and subsequent use process.

A slight error in the processing process may cause early failure of the mold. For example, cracking and hot cracking are common failure phenomena of aluminum alloy die-casting molds, which are caused by thermal fatigue, stress, low strength and surface roughness of the mold surface.

Ⅰ. The influence of die-casting mold cutting

During the machining process of the module, due to the destruction of the original balance of the workpiece matrix, stress will be generated. These internal stresses reduce the total strength of the module surface, resulting in insufficient thermal fatigue strength, resulting in cracks at the transition of corners and small radius arcs. Therefore, sharp corners should be avoided as much as possible. Sharp corners and machining tool marks can significantly cause stress concentration. Unless there are special requirements, sharp corners should be avoided, and the arc curvature radius of the corner should be fully enlarged, in order to avoid or reduce stress concentration.

For example, when the arc radius R is increased from 1mm to 5mm, the maximum internal stress is reduced by about 40%, which greatly improves the strength and toughness of the mold. When the module arc radius is increased from 2mm to 20mm, its impact toughness can be increased by 4 times.

In the same way, the surface roughness of the mold has a great influence on the life of the mold. If there are obvious knife marks, cracks, cuts, etc., these machining defects will cause stress concentration and become the root cause of cracks. Therefore, to ensure the surface roughness requirements of the die casting mold, the surface of the cavity should be ground and polished to remove defects such as knife marks.

If the drilling process of the cooling water hole is two-way drilling, misalignment occurs, which will cause early cracking at the place, resulting in water leakage.

The cutting allowance of the mould base is insufficient. The forged and annealed mold base, or the mold blank and core, are heated and quenched in an air furnace after processing. Generally, there is a certain thickness of decarburization layer, and the decarburization must be removed during cutting. All layers are removed. Otherwise, the residual decarburized layer will reduce the thermal fatigue resistance of the mold surface during the use of the mold, causing cracks in this part.

Ⅱ. Influence of die casting die grinding

After the heat treatment of the die-casting mold, the following problems may occur during grinding (including fitter and grinding wheel grinding):

1. Cracking or cracking occurs, which is due to the excessively hard grinding wheel, large feed amount, fast grinding speed, excessive grinding stress, insufficient cooling or improper coolant selection. Cracking occurs when the tensile stress generated by the frictional heat caused by the hard grinding wheel is greater than the fracture toughness of the material;

2. Grinding burn, surface softening. The softened surface is prone to cracking, erosion and pitting due to its low strength and insufficient thermal fatigue strength when in contact with molten die-cast metal.

3. Grinding stress. Grinding of the die-casting mold surface has grinding stress, which reduces the strength and thermal fatigue resistance of the mold surface, which will lead to cracks at the mold corners and small R arc transitions. A tempering treatment is carried out at a temperature of 20 to 30 ° C to achieve the purpose of stress relief.

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What Are the Categories of Automotive Plastic Moulds?(2023年03月09日)

gmmoldtech — 2023-03-02T15:36:16+0900

https://www.gmmoldtech.com/products/injection-moulding-products/

There are many ways to classify automobile plastic molds, which can be divided into the following categories according to the different methods of forming and processing plastic parts:

1. Automotive plastic moulded parts and injection molds

Plastic injection mold is also called injection mold. The molding process of this mold is characterized by placing the plastic raw material in the heated barrel of the injection machine. The plastic is heated and melted, and driven by the screw or plunger of the injection machine, it enters the mold cavity through the nozzle and the pouring system of the automobile plastic mold.

Since the heating and pressing device can function in stages, injection molding can not only mold plastic parts with complex shapes, but also has high production efficiency and good quality. Therefore, custom plastic injection moulding occupies a large proportion in the molding of plastic parts, and injection molds account for more than half of plastic molding molds. Injection machines are mainly used for the molding of thermoplastics, and in recent years, they have also been gradually used for the molding of thermosetting plastics.

2. Automotive plastic moulds and compression molds

Compression molds are also known as compression molds or compression molds. The molding process of this kind of mold is characterized in that the plastic raw material is directly added into the open mold cavity, and then the mold is closed. After the plastic is in a molten state under the action of heat and pressure, the cavity is filled with a certain pressure. At this time, the molecular structure of the plastic produces a chemical cross-linking reaction, which gradually hardens and sets.

Compression molds are mostly used for thermosetting plastics, and their molded plastic parts are mostly used for electrical switch housings and daily necessities.

3. Automotive plastic mould and transfer mold

Transfer mold is also known as injection molding or extrusion mold. The molding process of this automobile plastic mold is characterized by adding plastic raw materials into the preheated charging chamber, and then applying pressure to the plastic raw materials in the charging chamber by the pressure column. The plastic is melted under high temperature and high pressure and enters the cavity through the casting system of the mold. , and then a chemical cross-linking reaction occurs to gradually cure and form. The transfer molding process is mostly used for thermosetting plastics, which can mold plastic parts with complex shapes.

4. Automotive plastic moulds and extrusion molds

Extrusion die is also called extruder head. This automotive plastic mould can continuously produce plastics with the same cross-sectional shape, such as plastic pipes, rods, sheets, etc. The heating and pressurizing device of the extruder is the same as that of the injection machine. The molten plastic passes through the machine head to form a continuous molding plastic part, and the production efficiency is particularly high.

In addition to the types of automotive plastic moulds listed above, there are also vacuum forming molds, compressed air molds, blow molding molds, and low-foaming plastic molds.

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How to Determine Whether the Barrel Temperature of Plastic Injection Molding is Reasonable?(2023年03月08日)

gmmoldtech — 2023-03-02T15:35:46+0900

https://www.gmmoldtech.com/products/injection-moulding-products/

1. For prototype plastic injection molding, the melt is injected into the air. If the material flow is uniform, smooth, without bubbles, and the color is uniform, the barrel temperature is considered to be appropriate; if the material flow surface is rough, silver or discolored, it means that the barrel temperature is not suitable.

2. Directly observe the appearance of the injection moulding product. If there is no defect, it is considered that the temperature of the barrel is appropriate. Pay attention to the following issues in barrel temperature control.

① The adjustment of the barrel temperature should ensure that the plastic is well plasticized and can be injected and filled smoothly without causing decomposition. Only under the premise of sufficient plasticization, the plastic entering the cavity can fill the cavity with a smooth flow, and nearly completely reproduce the shape of the cavity to meet the perfect requirements.

If the plasticizing temperature is too low and the plasticizing is not uniform, the surface of the plastic injection molded product will have wavy marks and dull color. If the plasticizing temperature is too high, some plastic will be vaporized due to decomposition, and the surface of the product will be "frosted" in light, and silver streaks and blistering will appear in heavy.

In production, sometimes due to the poor resistance to high temperature of colorants, etc., the plasticizing temperature is intentionally lowered, and the injection pressure or injection speed is forced to fill the mold. The internal stress of the obtained product increases, which is easy to be stored or stored. Deformed, cracked or destroyed in the use environment. Therefore, to take care of the appearance quality of the product, first of all, the mechanical strength and durability of the product must be guaranteed. To do this, the sufficient plasticization of the material is a necessary prerequisite.

② The melting temperature of plastic not only affects the processing performance, but also affects the surface quality and color of plastic injection molding products. The maximum temperature near the end of the barrel is higher than the flow temperature (or melting point), which is the basic guarantee for processing.

However, in order to improve the apparent quality of the product, the melting temperature should be increased before the plastic decomposition temperature is reached, so that the surface gloss of the product increases and the color is more uniform. Generally speaking, it is best to increase the melting temperature by 20-30°C higher than the temperature required to fill the cavity.

③ Because of different injection molding machines, the temperature difference between the material temperature and the barrel temperature is different, so the temperature indicated on the temperature measuring millivoltmeter cannot be regarded as the actual temperature of the melt in the barrel at any time, but only as the actual temperature. Reference or adjustment basis. The temperature indicated by the millivoltmeter of the screw injection molding machine is close to or slightly lower than the actual temperature of 1I ~ 17 ° C; while the plunger injection molding machine is 11 ~ 17 ° C higher, and the difference between the two is 20 ~ 40 ° C.

In addition to the motion state of the material flow in the plastic injection molding barrel, the equipment of the temperature measuring device is also the cause of the difference. From a safety point of view, the thermocouple is preferably inserted above the horizontal barrel, which is the hottest point in the circumferential direction of the barrel, so as to avoid local overheating that may be caused by errors.

④ The relationship between the melt viscosity and temperature of plastics with different properties is different, and different temperature control focuses should be adopted.

⑤ The process of process debugging generally focuses on adjusting the temperature. Although it takes a lot of time to adjust the temperature of each section of the barrel, it can open the way for normal production by a more "gentle" method. If the pressure is frequently increased, it will not only increase the power consumption and mechanical loss, but also prone to machine and mold accidents.

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The Difference Between Die Casting Mold and Plastic Mold(2023年03月03日)

gmmoldtech — 2023-03-02T15:35:14+0900

https://www.gmmoldtech.com/products/die-casting-mould.html

The structure of the die casting mold is actually the same as the structure of the plastic mold. It should be said that if you can make a plastic mold, you should be able to make a die casting mold.

Ⅰ. The main difference between die casting mold and plastic mold

It is on the sprue sleeve of the feed. The sprue sleeve of the plastic mold tech china is a slender and tapered feeding port, and the diameter of the feeding port is relatively small. The feed port of the die casting mold is relatively large, and the diameter of the tapered feed port of the center feed is much larger than that of the plastic mold.

Ⅱ. Differences between die casting mold and plastic mold

1. The injection pressure of the die-casting mold is large, so the template is required to be relatively thicker to prevent deformation.

2. The gate of the die casting mold is different from that of the injection mold, and a high pressure of the split cone is required to decompose the flow.

4. The general cavity of the die casting mold should be nitrided to prevent the alloy from sticking to the cavity.

5. Generally, the die casting mold of die casting mould supplier is relatively corroded, and the outer surface is generally blued.

8. The high quality injection mold is generally exhausted by the thimble, the parting surface, etc. The die casting mold must have an exhaust groove and a slag collection bag (collect the cold material head).

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What is the Difference Between Rough Cutting and Finishing Cutting in CNC Machining Parts?(2023年03月02日)

gmmoldtech — 2023-03-02T15:34:41+0900

https://www.gmmoldtech.com/products/injection-moulding-products/

In the manufacturing process of CNC machining parts, the most commonly used processing methods are milling and turning, which are collectively referred to as cutting. There are two types of cutting processing in CNC lathe processing plants, which are called "rough cutting" and "fine cutting". So, what is the specific difference between rough cutting and fine cutting in CNC machining parts?

1. Rough cutting in CNC machining parts

The CNC machined workpiece is very close to the required shape and size after "rough cutting", but there is still enough metal allowance on the machined surface for finishing, so that the surface of the workpiece is smooth and the size is accurate.

Generally speaking, in the process of CNC machining, steel bars, forgings, castings, etc. can achieve the required shape and size with only one rough cutting and one fine cutting. However, sometimes some parts of a machine part may require more than one rough cut. For some hardware CNC machining parts, if the precision is not high or the amount of metal to be removed is small, it may only need one fine cutting.

For rough cutting, the cutting force must be considerable because most of the residual material is removed, which means that the entire machine, tool, workpiece or all three must be able to withstand it. The purpose of rough cutting in CNC machining parts is to remove excess material as quickly as possible. The remaining machined surface should not be too rough. Slender workpieces cannot resist bending and cannot damage the tip.

2. Fine cutting in CNC machining parts

Fine cutting is to make the workpiece surface smooth and dimensionally accurate, so it is a finer cutting. Finishing emphasizes precision - using very sharp tools, less metal is removed and higher precision is required when measuring.

Whether the machining method of CNC machining parts is rough cutting or fine cutting, CNC machining workers must set the rough cutting and fine cutting steps according to the pre-established process, and adjust the machine tool. The size and shape of the workpiece, the type of material, the type of tool, and the nature of the cut to be cut must be considered. Then start to adjust the machine to the correct speed and feed, and adjust the tool to achieve the required depth of cut.

We are experienced in the automotive, electrical and appliance moulding industries. As one of the injection moulding products manufacturers, we also manufacture moulds and offer mold tech china for other industries that require injection moulding. We are able to provide you with a complete service in this area, from the design of the moulds to high quality manufacturing in their own tool shop. If you are in need, welcome to contact us.

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Process Analysis of CNC Machining Parts(2022年10月19日)

gmmoldtech — 2022-10-19T12:16:43+0900

https://www.gmmoldtech.com/products/cnc-components.html

Ⅰ. Original data required for the formulation of the CNC machining parts process route

1. Parts design drawings, technical data, and product assembly drawings.

2. The production batch of parts.

3. Relevant technical standards required for CNC machining parts, such as enterprise standards and process documents.

4. Quality standards for product acceptance.

5. Existing production conditions and materials. The manufacturing capacity of process equipment and special equipment for cnc machining parts, the specifications and performance of processing equipment and process equipment, and the technical level of workers.

Ⅱ. Analysis of the blank state of CNC machining parts

Most part design drawings only define the shape and size of the part when it is machined, but do not specify the data of the original blank material including the type, specification, shape, heat treatment state, and hardness of the blank. A solid understanding of wool is an important start when programming. Using this raw information is beneficial to the CNC program planning.

1. Analysis of product assembly drawings and parts drawings

For the analysis and research of the assembly drawing, it is mainly to be familiar with the performance, use, and working conditions of the product, to clarify the mutual assembly position and function of the parts in the product, to understand the basis for formulating various technical conditions on the part drawing, and to find out its main technical key problems in order to lay the foundation for formulating the correct processing plan. Of course, when the process analysis of CNC machining parts is carried out for ordinary parts, the analysis and research of assembly drawing cannot be carried out.

2. Process analysis of parts drawings

The analysis and research of the parts drawing are mainly to carry out the process review of the parts, such as checking the views, dimensions, and technical requirements of the design drawings for errors and omissions. Especially for parts with poor structural manufacturability, if possible, communicate with the designer or propose revisions. It is up to the designer to decide whether to make the necessary modifications and improvements.

(1) Integrity and correctness analysis of parts drawing

The views of CNC machining parts should meet the requirements of national standards with accurate positions and clear expressions. Relationships (such as tangent, intersecting, and parallel) between geometric elements (points, lines, and faces) should be accurate. Dimensions should be complete and clear.

(2) Analysis of parts technical requirements

The technical requirements of parts mainly include dimensional accuracy, shape accuracy, positional accuracy, surface roughness, and thermal surface treatment requirements. These technical requirements should be the limit values under the premise that the performance of the parts can be guaranteed. The analysis of the technical requirements of parts is mainly to analyze the rationality of these technical requirements and the possibility of realization. Focus on analyzing the machining accuracy and technical requirements of important surfaces and parts, so as to prepare for the formulation of a reasonable machining plan.

At the same time, determine whether the technical requirements are too strict through analysis. Because too high precision and too small surface roughness requirements will complicate the process, increase the difficulty of processing and increase unnecessary costs.

(3) Analysis of dimensioning methods

The dimensioning methods of CNC machining parts drawing include local scattered labeling method, centralized labeling method, and coordinate labeling method. For parts processed on CNC machining tools, under the premise of ensuring the performance of the parts, the dimensions on the part drawing should be marked in a centralized manner or marked with the same datum (that is, marked with coordinate dimensions). This not only facilitates CNC programming but also facilitates the unification of design datum, process datum, and programming origin.

(4) Analysis of parts material

On the premise of satisfying the function of the parts, cheap materials should be selected. The choice of materials should be based in China. Do not choose precious and scarce materials casually

(5) Structural manufacturability analysis of parts

The structural manufacturability of CNC machining parts refers to the feasibility and economy of the designed parts to be manufactured on the premise that the designed parts can meet the performance requirements. Good structural manufacturability will make parts easy to process, which will save costs and materials. The poor structural manufacturability will make processing difficult, which will increase costs and waste materials or even fail to process.

Through the process of analyzing the structural characteristics, accuracy requirements, and complexity of parts, the processing method required for parts and the type and specification of the CNC machining tool can be determined.

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Pretreatment of Plastic Injection Molding Raw Materials(2022年10月19日)

gmmoldtech — 2022-10-19T12:15:49+0900

https://www.gmmoldtech.com/products/die-casting-mould.html

Due to the different supply methods (powder or pellets) and properties of plastics, the structure of the parts (with or without inserts) and the use requirements are different. The preparations for various products before molding are also different, which should be determined according to the specific situation. According to the characteristics of various plastics, the raw materials should be pretreated as follows before the plastic injection molding.

1. Inspection of plastic injection molding raw materials

The inspection of raw materials includes three aspects:

(1) Whether the raw materials used are correct and whether they can meet the use requirements of the product (variety, specification, brand, etc.).

(2) Appearance inspection (color, particle shape and uniformity, with or without impurities, etc.).

(3) Physical property inspection (including melt flow rate, fluidity, thermal stability, water content index, shrinkage rate, etc.).

2. Granulation and dyeing of plastic injection molding raw materials
If the raw material is powder, it needs to be granulated before molding. If plastic injection molding products require a certain color, the raw material needs to be dyed. The most common method for coloring injection molding parts is to use the color masterbatch for coloring. That is, mix the raw material particles and the color masterbatch evenly in a certain proportion, and directly add them into the hopper of the injection molding machine.

The method is simple and practical and can make the color uniform. However, the cost is high, and it is only suitable for the molding of the screw injection molding machine. If a plunger injection molding machine is used, it will cause color spots or color patterns on products due to uneven plasticization and mixing. For plastic injection molding with powder as the raw material, granulation and dyeing are generally used. That is, the powder and color masterbatch are extruded and granulated to obtain granules with uniform color.

3. Preheating and drying of plastic injection molding raw materials
Various plastic particles often contain different degrees of moisture, solvents, and other volatile low molecular substances. Their existence often causes defects such as silver streaks, shrinkage holes, and air bubbles in injection molding products. The high temperature will also cause cross-linking and degradation of plastics, which will result in reducing the product performance and appearance quality. Therefore, before the plastic injection molding, most plastics need to be preheated and dried.

Plastics such as polyamide, polycarbonate, polysulfone, polymethyl methacrylate, polyphenylene ether, etc. have a tendency to absorb moisture because their molecular structure contains amido groups, ester groups, nitrile groups, and other hydrophilic groups. Therefore, they should be dried in general. Although the hydrophilic ability of plastics such as polystyrene and ABS is not strong, they generally need to be dried as well. For polyolefin, polystyrene, polyvinyl chloride, polyoxymethylene, and other plastics that are not easy to absorb moisture, if the packaging is tight and the storage and transportation are good, it is generally not necessary to dry.

There are many drying methods, which should be selected according to plastic properties, production batches, and specific drying equipment. Small batches are mostly dried in a hot air circulation oven and infrared heating oven. Whereas, boiling drying and airflow drying are commonly used in large batches. Plastics that are easily oxidized and discolored at high temperatures, such as polyamides, should be dried in a vacuum oven. Drying temperature, time, and material layer thickness are the main factors affecting the drying effect.

The higher the temperature is, the faster the low molecules and water volatilize. However, the softening temperature or melting point of the plastic cannot be exceeded, the material will easily become soft and agglomerated, which will make feeding difficult. The drying temperature is generally around 100°C. A longer drying time is beneficial to improve the drying effect, but it is easy to cause energy waste. And it will also cause decomposition and discoloration of plastics with poor thermal stability. If the material layer is too thick, due to the poor thermal conductivity of the plastic, the drying effect of the surface layer and the center layer will be different under the same drying conditions.

Therefore, the thickness of the material layer should be 20-50mm. It should be noted that the pellets should be properly sealed and stored after drying to prevent the plastic from absorbing moisture again and losing its drying effect. Some plastics that are particularly sensitive to moisture at the plastic injection molding temperature should also consider the use of a sealed or heated hopper during the molding process.

As one of the automotive plastic injection molding companies, we provide custom plastic injection moulding, plastic parts injection molding, 2k mould, cnc rapid prototyping, mould die casting and etc. Contact us to know more about mold technology.

How about the machining accuracy of molds in China(2022年10月19日)

gmmoldtech — 2022-10-19T12:14:49+0900

https://www.gmmoldtech.com/products/injection-moulding-products/

In the past few decades, manufacturing costs in China have been substantially lower than their equivalent in Western countries. Although prices have been on the rise in recent years, it’s still cheaper to produce in China than anywhere else.

It is important, however, to realize that China offers a myriad of suppliers at wide price and quality ranges, and subsequently at various levels of credibility. Different prices have different qualities There is an old saying that you get what you pay for. However, the molds purchased from Glitter mold are absolutely worth the money.

Not to brag, Our company adopts high precision machining CNC. The maximum speed is 18000 rpm. Generally, the processing accuracy of our injection mold is controlled within 0.015 mm.

For each components of the injection mold, we will use CMM for inspection after each process is completed.

How does GM-TECH manufacture high accuracy plastic injection mold ? Mainly from the two aspects of mold design and mold processing. In addition, the defects of the product itself will also affect the mold accuracy.

1 mold design

- Conduct mold flow analysis in the early stage of the product, find a more reasonable glue inlet point of the product, achieve the glue inlet balance, the mold locking force is within the scope of the injection molding machine, and the product deformation is relatively small.

-Product parting face: Don't design an arc surface if you can make a plane, and do not design shut off if you can design kiss off.

-Mold positioning: fine positioning in three aspects of design: positioning of internal mold, mold guide post positioning and side lock positioning.

-Product cooling: the distance between the transported water and the product shall be the same as far as possible. The cooling is uneven and the product deformation is large.

-Mold void un function face: after a certain sealing surface is reserved, other surfaces are avoided, and the front and rear molds are avoided, which can not only improve the processing accuracy, but also improve the processing efficiency.

-The fractal surface of the mold embryo is supported by a balance weight to prevent the fractal surface of the internal mold from collapsing too quickly.

-Ball guide sleeve or bronze plus graphite for guide in ejector plate.

-The cavity bottom depth of plate B shall be thickened as much as possible to avoid the deformation of injection molding formwork, and the support pillar will not play a great role.

-Each part drawing shall be marked with machining tolerance.

2 mold processing

-Mold parts shall be finished with high speed CNC, and the accuracy shall be within + / - 0.02 mm.

-It's better to making the mold parts at one time to avoid repeated off machine, and there will be errors in the calibration table every time.

-The wire cutting of mold parts is processed with Sodick slow wire cutting imported from Japan.

-Mold core inserts that can be processed by grinder do not make it by CNC, especially round inserts.

-Fitting the mold cannot be polished by the hand, but directly on the fitting machine.

-The accuracy of mold base is controlled within 0.02mm, and the normal mold is more than 0.05mm.

-For mold inserts and copper electrodes, using three-dimensional full inspection, and the good CNC can be tested directly on the machine.

As one of the plastic moulded products manufacturers, we provide plastic moulded products, plastic parts injection molding, plastic moulded parts, custom plastic injection moulding and etc. Contact us to know more about mold tech china.

The Barrel Temperature of Plastic Injection Molding Products(2022年10月19日)

gmmoldtech — 2022-10-19T12:13:59+0900

https://www.gmmoldtech.com/products/die-casting.html

The temperature to be controlled in plastic injection molding products mainly includes barrel temperature, nozzle temperature and mold temperature.

When determining the temperature of barrel, it should be ensured that the plastic is plasticized evenly and can be filled smoothly without causing plastic degradation. The determination principle of barrel temperature is as follows.

1. For plastic injection molding in plastics with poor thermal stability, such as PVC, POM, the barrel temperature should be lower. For plastics with wide heating temperature range and large melting viscosity, the barrel temperature should be higher. For the same type of plastics with high average molecular weight and narrow molecular weight distribution, the barrel temperature should be high, and vise versa.

For plastics with plasticizer, lubricant and other additives, because of its low viscosity and good fluidity, the barrel temperature should be relatively low. For plastics with glass fiber or other solid filler, the barrel temperature should be relatively high. In short, the barrel temperature of plastic injection molding should consider the thermal stability and rheological properties of molding materials.

On the basis of reasonable selection, maintain stability in the whole molding process. To avoid the overheating decomposition of materials, in addition to the selection and control of the highest temperature of the barrel, we should also strictly control the residence time of materials in the barrel, which is particularly important for plastics with poor thermal stability. The residence time of the material in the barrel depends on the relative ratio of the actual injection volume to the maximum injection volume of injection molding machines, the plasticizing ability of injection molding machines and other factors.

2. The barrel temperature determination of plastic injection molding is also related to molding products and mold structure. Generally, when injection molding products is with thin wall, long flow, complex structure and metal inserts, the barrel temperature should be higher. Otherwise, it may cause defects of products such as incomplete mold filling.

3. In the case of the same other conditions for plastic injection molding, the type of injection molding machines is different, and the barrel temperature should also change accordingly. For example, the barrel temperature of a screw injection molding machine is 10-20℃ lower than that of a plunger injection molding machine.

4. The barrel temperature of plastic injection molding interacts with other process conditions. Sometimes changing the barrel temperature will have the same effect as changing other process conditions. For example, in order to improve the filling flow length of melt, the method of increasing the barrel temperature can be adopted, and the injection pressure and injection speed can be correspondingly increased. Therefore, the barrel temperature determination of plastic injection molding must be combined with other technological conditions.

5.The barrel temperature distribution of plastic injection molding is usually gradually increased from the hopper to the nozzle to ensure the steady rise of plastic temperature and achieve the purpose of uniform plasticizing. In some special cases, this distribution can be changed. For example, the high water content in molding material will make rear barrel temperature slightly high to facilitate the discharge of water vapor. The screw injection molding machine can produce a lot of shear heat, so in order to prevent material decomposition, the front barrel temperature can be slightly lower than the middle barrel temperature.

As one of the aluminium die casting manufacturers, we provide plastic injection moulding parts, plastic parts injection molding, automotive die casting, custom die casting and etc. Contact us to know more about mold tech china.

How to find a good mold supplier in China(2022年10月19日)

gmmoldtech — 2022-10-19T12:13:12+0900

https://www.gmmoldtech.com/products/cnc-components.html

In the past few years, production costs in China have been substantially lower than their equivalent in Western countries. Although prices have been on the rise in the recent years, but it’s still cheaper to produce in China than anywhere else. Now it's easy to find several mold processing factory in China.

Look at the scale of suppliers first.
There are two extremes to avoid. First, do not covet large-scale factories. Although large-scale mold suppliers have more standardized equipment and management, they often have a relatively fixed customer market, and their products are often more specialized. If you only need to open a relatively simple mold for the first cooperation, whether there are large orders in the back can attract suppliers, which can easily lead to suppliers not cooperating or simply refusing to cooperate. Even if you cooperate, it is difficult to manage such suppliers. For example, although he promised to test your mold within a month. but his main customers suddenly ordered him a large order with a very short lead time. Nine times out of ten he'll be delayed on your project .

The other extreme is to select the one with small scale, incomplete equipment, insufficient experience in mold manufacturing, and it is difficult to guarantee the quality and delivery date The ideal mold supplier scale is the same as that of your company. The price of the mold you want to make now is attractive to him, or your company can establish a long-term cooperative relationship with him, Or your company's industry is exactly what they want to get involved in (for example, your company is an injection molding or auto mold industry. A supplier who has never produced auto parts molds may be interested in you, because if he provides you with products, it can be said that he has entered the door of this industry and it will be more convenient to do it for other companies in the future.)

Look at the supplier's production capacity and quality control ability.
This principle is ok if the mold maker meets your mold quality sufficient. For example, if the accuracy of your mold is required to be within 0.01mm, the mold supplier may have to meet the requirements by slow wire cutting, EDM or even constant temperature workshop, and have inspection tools and equipment such as three coordinates with sufficient accuracy to ensure the delivery quality of the mold. Provide the test report to you for confirmation before the order is completed. If there are conditions, you can ask the supplier which customers have made products before, how the effect is, what precision can be achieved, and whether you have made similar products.

Then look at the lead time and quote of the supplier.
Before determining the cooperation relationship, the supplier should be required to list in detail the project cycle and time node of product processing, such as how long the technical exchange takes and what to do. How long does it take for blanking, roughing, finishing, heat treatment, fine grinding and other processes. Provide project schedule report every week.

About the RFQ,On the one hand, the quotation is to examine the supplier's cooperation attitude and cost control ability, on the other hand, it is also to examine the supplier's professional level in the industry, whether the expenses reported are reported, and whether the prices reported are objective. As for the prices, another thing to say is that don't be greedy for cheap, excessively depress the profits of suppliers, and even let suppliers do business at a loss. Because the wool comes from the sheep, the money he loses now, or find a way to earn it back in the future (no enterprise will really lose money), or if he can't earn it back, he won't do it for you. Cooperation must be win-win.

As one of the automotive automotive injection molding companies, we provide plastic injection molded products, plastic parts injection molding, precision machining parts, cnc machined components, cnc components and etc. Contact us to know more about plastic mold technology.

Nozzle Temperature and Mold Temperature for Plastic Injection Molding(2022年10月19日)

gmmoldtech — 2022-10-19T12:12:27+0900

https://www.gmmoldtech.com/products/automotive-product-mould/

Ⅰ. The nozzle temperature of plastic injection molding

In order to prevent the molten material from flowing out of the nozzle automatically, resulting in the casting, the nozzle temperature is generally lower than the front barrel temperature. The friction heat generated by the molten material passing through the nozzle at high speed during injection is used to increase the material temperature.

But the nozzle temperature can not be too low, otherwise the condensate in the nozzle will plug the nozzle and the mold gating system (especially the pin-point gate). The cold material can be injected into the mold cavity, so that the plastic injection molding products are with cold spots, affecting the quality of products.

The influence of mold temperature on injection molding and product properties and the choice of nozzle temperature and barrel temperature are also related to injection pressure. When the injection pressure is lower, we should properly raise the barrel and nozzle temperature to ensure the flow of material, and vice versa.

Generally, we use "air injection" or "intuitive analysis of products" to adjust the molding process conditions and determine the best barrel and nozzle temperature before the plastic injection molding.

Ⅱ. The mold temperature of plastic injection molding

Mold temperature refers to the mold wall temperature in direct contact with plastic. It directly affects the fluidity of plastic mold filling, the cooling rate of products, the molding cycle and the results of crystallization, orientation, shrinkage of products. It is an important factor related to the quality of products.

For thermoplastic plastic injection molding, the mold temperature must be controlled below the plastic thermal deformation temperature or glass transition temperature to ensure that the parts have enough stiffness when they are released without deforming. Under this general principle, the specific value of mold temperature should be based on the characteristics of plastic (such as whether it is crystalline plastic, melting viscosity size, etc.), the structural characteristics of products (such as the complexity of the shape, the wall thickness, etc.), the use of products (such as the crystallinity of crystalline plastic) and other molding process conditions.

For amorphous plastics, under the condition not affecting the mold filling, the mold temperature can be lower, which is conducive to shorten the molding cycle and improve productivity. For crystalline plastics, the mold temperature not only affects the mold filling and plastic injection molding cycle, but also determines the crystal structure and crystallinity of products and then affects the properties of products.

In addition to the above factors, the choice of mold temperature should also be conducive to uniform cooling of plastic in the mold cavity, which is the reason for choosing a higher mold temperature when molding products with thick wall.

As one of the automotive automotive injection molding companies, we provide plastic injection molded part, plastic parts injection molding, automotive injection molding, automotive plastic parts Mould and etc. Contact us to know more about in mold technology.

The Plastic Injection Molding Barrel Cleaning and Insert Heat Treatment(2022年10月19日)

gmmoldtech — 2022-10-19T12:11:49+0900

https://www.gmmoldtech.com/products/automotive-part.html

Ⅰ. The plastic injection molding barrel cleaning

In injection molding production, it is often necessary to change the raw materials, change the color, or cause the decomposition of the raw materials due to the increase of temperature. When all these situations occur, the barrel of the plastic injection molding machine needs to be cleaned. There are several cleaning methods as follows.

1. For the cleaning of the barrel of the plunger injection molding machine, the assembly must be disassembled and then cleaned.

2. The cleaning of the barrel of the screw injection molding machine usually adopts direct refueling cleaning. In order to facilitate the cleaning of the barrel, generally the plastic injection molding products with light color, low melting temperature and poor thermal stability are processed first.

3. If the molding temperature of the new material is higher than the temperature of the remaining material in the barrel, the temperature of the barrel and nozzle should be raised to the minimum processing temperature of the new material, and then the new material (or its recycled material) should be added for continuous air injection until the After the remaining material in the barrel is exhausted, the temperature of the barrel is raised, and when the temperature of the nozzle reaches the required range, new raw materials can be added and transferred to production.

If the plastic injection molding temperature of the new raw material is lower than the temperature of the remaining material in the barrel, the temperature of the barrel and the nozzle should be raised to make the remaining material in the best flow state, then cut off the heating power of the barrel and the nozzle, and use a new The raw materials (or their recycled materials) are continuously injected into the air until the remaining materials in the barrel are exhausted. When the temperature drops to the processing temperature of the new materials, new raw materials are added for production.

4. For heat-sensitive residual materials such as polyvinyl chloride and polyoxymethylene, in order to prevent the plastics from decomposing during the cleaning process, the plastics with good thermal stability such as low-density polyethylene and polystyrene should be used for transition cleaning, and finally the processed The new material replaces the cleaning material.

5. In order to reduce the waste of raw materials, injection molding machine barrel cleaning agent can be used, which is suitable for cleaning injection molding machine barrels of various thermoplastics with a processing temperature range of 180-280 °C.

Ⅱ. The plastic injection molding insert heat treatment

In plastic injection parts, some metal inserts are sometimes added to increase the working strength of the parts due to the work needs of the parts. Metal parts and plastics are welded into one body during injection molding. Due to the large difference in thermal performance and temperature between the two, a large stress concentration occurs around the plastic and metal contacts during curing, cracks appear, and the strength of the product is reduced.

In order to avoid these phenomena, the metal parts should be preheated before welding with the plastic. The preheating treatment of metal parts can be carried out in the range of 110-150°C according to different metal materials. For smaller metal parts, preheating may be omitted as appropriate.

As one of the automotive plastic injection molding companies, we provide injection moulding products, plastic parts injection molding, injection moulding car parts, automotive plastic injection molding and etc. Contact us to know more about mold technology.

What Are the Main Methods of Forming Automotive Plastic Molds?(2022年04月01日)

gmmoldtech — 2022-03-30T15:18:23+0900

https://www.gmmoldtech.com/what-are-the-main-methods-of-forming-automotive-plastic-molds.html

Automotive Mold Technology
There are many ways to classify automotive plastic moulds. According to the different methods of forming and processing plastic parts, they can be divided into the following categories:

1.Plastic injection molding for automotive plastic mould
The characteristic of plastic injection mold and molding is that the plastic raw material is placed in the heating barrel of the injection molding machine. The plastic is melted by heat, driven by the screw or plunger of the injection molding machine, enters the mold cavity through the nozzle and the pouring system of the mold, and the plastic is formed by heat preservation, pressure retention, and cooling in the mold cavity. Since the heating and pressing device can function in stages, injection molding can not only form plastic parts with complex shapes, but also has high production efficiency and good quality. Therefore, the injection mold occupies more than half of the proportion in the molding of plastic parts. Injection molding machines are mainly used for the molding of thermoplastics, and in recent years have gradually been used for the molding of thermoset plastics.

3. Transfer moulding for automotive plastic mould
The characteristic of the molding process of this automotive injection mold is that the plastic raw materials are added into the preheated feeding chamber, and then pressure is applied to the plastic raw materials in the feeding chamber by the pressure column. The plastic is melted under high temperature and high pressure and enters the cavity through the casting system of the mold. And then the chemical cross-linking reaction occurs and gradually solidified into shape. The transfer molding process is mostly used for thermosetting plastics, which can form plastic parts with more complex shapes.

In addition to the several types of plastic injection mold listed above, automotive plastic mould molding processes include vacuum molding molds, compressed air molds, blow molding molds and low-foaming plastic molds.

More details of mold technology, please visit our website.

What Are the Common Products Made by Injection Molding in Our Life?(2022年04月01日)

gmmoldtech — 2022-03-30T15:18:01+0900

https://www.gmmoldtech.com/what-are-the-common-products-made-by-injection-molding-in-our-life.html

1. Products made by injection molding in the medical industry

At present, the medical industry has a wide range of products made by injection molding, such as high-transparent PPT droppers, electronic thermometer shells, sprayer shell injection molded products, laser writing instrument medical hands, physiotherapy hot compress spine neck protector plastic shells, medical sharp weapon boxes, and medical virus detector shells, shells of oral X-ray film machines.

2. Products of precision injection molding in the home appliance industry

The plastic injection molding products that are commonly used in our lives are small hand-held fans, humidifier shells, heater shells, hand warmers, mixers, rice cooker shells, air conditioner shells, TV shells, hairdryer shells, water heater shells, and so on.

3. Products of precision injection molding in the cosmetic packaging industry

Common products include dozens of lipstick tubes, powder boxes, lip glaze tubes, eyebrow pencils, cream tubes, lip gloss tubes, sub-bottles.

If you want to know more about mold tech china, please leave us a message.

What Are the Classification of Injection Mold Processing?(2022年04月01日)

gmmoldtech — 2022-03-30T15:17:39+0900

https://www.gmmoldtech.com/what-are-the-classification-of-injection-mold-processing.html

Ⅰ. The plastic injection mold processing
Injection molding is a relatively common manufacturing method of industrial products in machining processing. This processing plastic mold technology obtains the required shape by processing rubber and plastic. There are many types of injection mold processing. In the process of processing, the processing technology should be selected according to the requirements of the injection product.

Ⅱ. The injection mold classification
1. Single parting surface injection mold

2. Double parting surface injection mold

Double parting surface precision injection molding has two parting surfaces. Compared with single parting surface injection molds, double parting surface injection molds have a movable intermediate plate in the fixed mold part, so this type of injection mold is called three-plate injection mold. It is most commonly used for single-cavity or multi-cavity molds with point gate feeding.

3. Injection mold with lateral parting and core pulling mechanism

4. Injection mold with movable forming parts

5. Automatic thread unloading injection mold

6. Runnerless injection mold

7. The injection mold of the demoulding mechanism on the fixed mold

Vacuum Moulding(2022年04月01日)

gmmoldtech — 2022-03-30T15:17:10+0900

https://www.gmmoldtech.com/products/vacuum-moulding.html

In order to meet the requirements of small batch production and material performance, we provide vacuum injection molding for customers.

Features of Vacuum Moulding
GM-TECH, a professional plastic injection molding company, has designed and manufactured dozens of sets of automobile rear-view mirror molds for Kaiming hall in Murakami, Japan. The products are basically used in Toyota, Honda, and Nissan. In addition, we have also produced dozens of sets of lamp molds for Haila, including headlamp mask, headlight guide strip, headlight reflector, etc.

The Specification of Vacuum Moulding

Part namesample, prototype,
Part materialplastic
Machining accuracy+ / - 0.1
Tool life20 shots
Exporting countryIsrael
Delivery time1 week
Delivery mode DHL3 days
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

If you want to know more details in mold technology, please visit our website.

Two Shots Moulding Part(2022年04月01日)

gmmoldtech — 2022-03-30T15:16:47+0900

https://www.gmmoldtech.com/products/two-shots-moulding-part.html

Two shot moulding , also known as dual-shot, multi-shot, allows engineers to create multi-material or multi-colored parts without other steps.

It is a kind of plastic raw materials of injection molded parts after the parts out, fed into the second mold again with the same or another plastic material molding process.

Features of Two Shots Moulding Part
The soft surface

The two-shot injection molded parts can make the surface of the product full of soft, which can increase the functionality.

High product value

The two-shot custom plastic injection molding by GM-TECH, a reliable injection mold components supplier, combines two or more materials with different characteristics to increase product value.

Versatile functions

The two-shot products made by the plastic injection mold and molding technique are known for being multifunctional. With this technology, two-shot moulding parts are widely used in noise reduction, shock absorption, waterproofing, and so on.

Specification of Two Shots Moulding Part

Part materialABS + TPU
Cavity1
Mould steelH 13
Mould steel1.1730
Runner2 drops mold master
Mould life100W
Mould standardHASCO
Mould structure5 lifters
Exporting countryCanada
Leadtime5 weeks
Mould quality customer satisfaction98%
FAI pass rate99%
Project cooperation service customer satisfaction98%

How Does the Two Shots Moulding Part Work？
In order to meet the special needs of many plastic products, injection-molded plastic parts manufacturers use two or more two kinds of plastic raw materials many times. In the two-shot injection molded part process, the covering material is injected above, below, around, or inside the substrate, and the material is combined into a complete part. This process of two shots of precision injection molding can be completed through multiple injections or embedded injection.

As a plastic mold technology inc, we will do our best to meet all customers’ needs.

Screw Thread Mould(2022年04月01日)

gmmoldtech — 2022-03-30T15:16:04+0900

https://www.gmmoldtech.com/products/screw-thread-mould.html

The screw thread mould, a special part of the custom plastic injection molding process, is used for mass production of screw thread.

Features of Screw Thread Mould
Short cycle time

With plastic injection molding machine,the screw thread can be manufactured quickly.

Better maintenance

High precision injection molds of screw thread are tools requiring high maintenance. Everything must be timed, and that timing must be maintained to get the best productivity.

Low cost

Large plastic molds can be performed spontaneously to save the labor and material cost.

Fast ventilation

Usually the thread is formed in a blind pocket. Trapped gas will be vent out.

The Specification of Screw Thread Mould

Part materialPP
Cavity1
runnercold runner
Mold accuracy+ / - 0.02
Mold steel1.2343
Moldbase steel1.1730
Mold life100W
Mold standardHASCO
Mold structure2 slides
Exporting countryItaly
Delivery time4 weeks
Mold quality customer satisfaction98%
FAI pass rate98%
Project cooperation service customer satisfaction95%

How does Screw Thread Mould Work?

There are four general steps to produce screw thread plastic injection mold.

Split tooling

Numerous screw-threaded parts are injection moulded by this step.

Thread jumping

This is the cheap plastic injection molding to produce screw thread molding product. It is very widely used for the manufacture of closure threads.

Collapsible coring

It is very convenient to manufacture common injection molded plastics.

Rotary unscrewing

Rotary unscrewing is used where split line witness cannot be tolerated or often when larger numbers of impressions are required.

If you want to know more about mold technology, please contact us.

Prototype Moulding(2022年03月30日)

gmmoldtech — 2022-03-30T15:13:21+0900

https://www.gmmoldtech.com/products/prototype-moulding.html

Prototype mold china life is very low, cost is cheap. In order to meet the requirements of small batch production and material performance, we provide prototype molding.

Generally, we use poor steel, such as aluminum, S50C and so on. The structure and production principle of rapid die are the same as plastic injection moulding products.

Features of Prototype Moulding
GM-TECH, a professional manufacturer in prototype cnc machining, has designed and manufactured dozens of sets of automobile rear-view mirror molds for Kaiming hall in Murakami, Japan. The products are basically used in Toyota, Honda, and Nissan. In addition, we have also produced dozens of sets of lamp molds for Haila, including headlamp mask, headlight guide strip, headlight reflector, etc.

The Specification of Prototype Moulding
Mold NameExperimental mold
Part materialABS
Machining accuracy+ / - 0.02
Mold life1W shots
Exporting countryIsrael
Delivery time4 weeks
Delivery modeDHL 3 days
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

If you want to know more about mold tech china, please visit our website.

Vacuum Moulding(2021年)

gmmoldtech — 2021-11-30T12:06:30+0900

https://www.gmmoldtech.com/products/vacuum-moulding.html

In order to meet the requirements of small batch production and material performance, we provide vacuum molding for customers.

Features of Vacuum Moulding
GM-TECH, a professional plastic injection moulding products manufacturer, has designed and manufactured dozens of sets of automobile rear-view mirror molds for Kaiming hall in Murakami, Japan. The products are basically used in Toyota, Honda, and Nissan. In addition, we have also produced dozens of sets of lamp molds for Haila, including headlamp mask, headlight guide strip, headlight reflector, etc.

The Specification of Vacuum Moulding

GM-TECH is a professional injection moulding suppliers, we provide vacuum moulding plastic, custom plastic injection mold and etc.

Prototype Part(2021年)

gmmoldtech — 2021-11-30T12:06:12+0900

https://www.gmmoldtech.com/products/prototype-part/

Our company usually uses the following four methods to manufacture the first board: CNC Prototype, 3D Printing, Vacuum Moulding, Prototype Moulding.

If you design a product just to verify the structural feasibility of the product, we recommend that you give priority to the cost and cost of using 3D printing. Time is the lowest. If your product requires specified materials but does not require high accuracy, use Vacuum Moulding. If your product requires high material and product accuracy, it is recommended to use CNC prototypes. If the product requires high and large quantities. We recommend using Prototype Moulding.
Prototype Part Features
Our company usually uses the following four methods to manufacture the first board: CNC Prototype, 3D Printing, Vacuum Moulding, prototype injection molding.

If you design a product just to verify the structural feasibility of the product, we recommend that you give priority to the cost and cost of using 3D printing. Time is the lowest. If your product requires specified materials but does not require high accuracy, use Vacuum Moulding. If your product requires high material and product accuracy, it is recommended to use CNC Prototype. If the product requires high and large quantities. We recommend using Prototype Moulding.

Prototype Part FAQs
How many days does it take to send parts to Germany?How many days does it take to send parts to Germany?
The fastest DHL express delivery in Europe usually takes about 3 days to reach each country in Europe, while FedEx in the United States usually takes about 3 days to arrive

What is the tolerance of parts?What is the tolerance of parts?
If the customer does not have special requirements, the processing is generally within + / - 0.1mm.

How long is the delivery time for Prototype Part processing?How long is the delivery time for Prototype Part processing?
generally 3 days.

GM-TECH is a professional injection moulding suppliers, we provide prototype cnc machining, injection molding part design and etc.

Prototype Moulding(2021年)

gmmoldtech — 2021-11-30T12:05:52+0900

https://www.gmmoldtech.com/products/prototype-moulding.html

Prototype mold life is very low, cost is cheap. In order to meet the requirements of small batch production and material performance, we provide prototype molding.

Generally, we use poor steel, such as aluminum, S50C and so on. The structure and production principle of rapid die are the same as plastic injection moulding products.

The Specification of Prototype Moulding

GM-TECH is a professional plastic injection moulding manufacturer, we provide rapid injection molding, rapid injection molding prototyping, prototype mold making, products made by injection moulding and etc.

Product Development(2021年)

gmmoldtech — 2021-11-30T12:05:07+0900

https://www.gmmoldtech.com/products/product-development.html

Our company is not engaged in plastic molding development, but we are willing to assist customers to design product appearance and product structure in case of customer demand.

After the product design drawings are reviewed and confirmed by customers, we provide customers with Free custom 3d printing samples to check the feasibility of the product structure.

This is a drug release device designed by our company.

Custom Plastic Injection Molding Development

Plastic injection molded parts have a long history of 150 years. While modern technology development brings custom plastic injection molding with high precision and efficiency. GM-TECH, a professional plastic injection molding company in china, provides custom plastic injection moulding parts to meet your demanding requirements. Our custom plastic injection molding design can be your best choice. Here are the reasons why choosing us as your reliable injection moulding products manufacturer.

Comprehensive service

Capable project management from design to the final part. One-stop service for all of our clients’ plastic molding needs.

Industry experience

Decades of custom plastic injection molding engineering and processing experience.

Premium quality products

Durable, high-quality components you expect are available in our injection molding factory.

Variety of design and material options

Customized design and a full range of plastic material offerings including a wide variety of colorant and over-molding options.

GM-TECH is a professional plastic injection molding companies in china, we provide plastic parts injection molding, precision injection molding and etc.

Plastic Injection Mould(2021年)

gmmoldtech — 2021-11-30T12:04:06+0900

https://www.gmmoldtech.com/products/plastic-injection-mould/

GM-TECH is mainly engaged in the production of high-precision injection mould production plants. And the production of precision injection moulds is very widely used, including products such as automotive plastic parts, medical plastic parts, electronic plastic products, toy plastic products, industrial products, etc.

In the early stage, we have won the trust and cooperation of customers with decades of professional plastic injection mold and molding design experience. In the later stage, we will win the long-term trust and cooperation of customers with reliable and stable mould quality!

Plastic Injection Mould Features
All the injection molds and molding parts that we made are exported to abroad such as,USA, Europe, Japan, Singapore, India and other countries. Molds vary from 50kg to 10 tons，including automotive plastic mould, electronic product molds, industrial product molds, home appliance molds, medical product molds and so on.

The leadtime for mold manufacturing generally takes 4-8 weeks, depending on the ease of the mold.

GM-TECH mainly produces and designs high-precision and high-quality moulds. We are good at the fields of automobile product mould, electronic product mould, home appliance mold, medical product mould, insert mould, two-color mould, multi hole mould, thread mould, gear mould, etc

Plastic Injection Mould FAQs
What are your common mold steel?What are your common mold steel?
Generally, we use steel materials required by customers, such as 1.1343, H-13, S136, NAK80, P20 and so on. And we will provide steel certification to customers.

How long is the delivery time for mold processing?How long is the delivery time for mold processing?
Specific to see the difficulty of mold, generally 2-8 weeks

Is your company familiar with export mould standard?Is your company familiar with export mould standard?
Yes, we are very familiar with DME, HASCO and Mishmi standards.

How do you guarantee the quality of the mould?How do you guarantee the quality of the mould?
Mold design: when the design is completed, our engineers will meet to review the mold. Mold processing: CMM inspection will be carried out for each machining step (electrode, CNC,) of parts.

GM-TECH is a professional China injection mould factory and plastic injection mould suppliers, we provide injection mold service china, products made by injection molding and etc.

Multi Cavity Mould(2021年)

gmmoldtech — 2021-11-30T12:03:48+0900

https://www.gmmoldtech.com/products/multi-cavity-mould.html

A multi-cavity mould is known as a mould with multiple cavities. The multi-cavity mold consists of a multi-cavity of different plastic parts.

Though multi-cavity injection molding process may be much more complex than others such as insert injection molding process, it is still popular as the improvements of production efficiency and cost-efficiency. As a leading multi-cavity mould manufacturer, GM-TECH provides you with high-grade multiple cavity mould to meet the needs of high-yield, high-precision products.

Features of Multi Cavity Mould
Multi cavity mold contain more than one cavity of the same part. It’s able to produce many parts per injection molding cycle with high-volume production. Here are some major features of a multi-cavity mould.

More parts can be manufactured by the same mold within the cavity.

Generally speaking, a multi-cavity mould is at a lower custom plastic molding cost than a single cavity mould.

The requested number of components will be finished faster due to the shorter lead time per batch.

More efficient use of the cycle time

The processes of multi-cavity mould are more stable

It keeps flow balance of cavity injection molding

The Specification of Multi Cavity Mould

Part materialPP
Cavity16
Runner：16 drops hot runner
Mold accuracy+ / - 0.02
Mold steel1.2343
Mold blank steel1.1730
Mold life100W
Mold standardHASCO
Mold structure12 lifters
Exporting countryAustralia
Lead time5 weeks
Mold quality customer satisfaction100%
FAI pass rate100%
Project cooperation service customer satisfaction100%
How does Multi Cavity Mould Work?

The basic manufacturing process of multi-cavity mould by GM-TECH, a professional company specializing in moulding products, are as follows:

Plastic is melted in a plastic injection molding machine and then injected into a mold under high pressure. The material is cooled and solidified inside the mold, then the two halves are opened and the product is removed. The technology produces plastic products with predetermined fixed shapes.

To simplify production, the parts of multi-cavity mould that function in the plastic injection molding process must be carefully designed. Products made using multi-cavity injection molding machines are first designed by industrial engineers or designers. The die manufacturer takes into account all the key conditions: the materials used in the final product, the function of the product; In addition, the material of the mold, and the characteristics of the multi-cavity injection molding machine.

GM-TECH is a professional injection moulding products manufacturers, we provide plastic parts injection molding, plastic molded parts and etc.

Mould Slide(2021年)

gmmoldtech — 2021-11-30T12:03:21+0900

https://www.gmmoldtech.com/products/mould-slide.html

The slider is a mold component that can slide in a certain angle perpendicular to or with the opening and closing direction during the opening and closing action of the mold.

Features of Mould Slide
When the product structure makes it impossible for the mold to demould normally without the slider, the slider, the injection molding machine component, must be used. The material itself has appropriate hardness, wear resistance, enough to withstand the friction of the movement. The hardness of the cavity part or core part on the slider should be the same level as other parts of the cavity and core.

The Specification of Mould Slide
Part nameslider
Part material1.2343
Mold accuracy+ / - 0.015
Dimension detection methodCMM
Surface treatmentEDM
Exporting countryGermany
Delivery time2 weeks
Mold quality customer satisfaction100%
Project cooperation service customer satisfaction100%

GM-TECH is a professional custom plastic mold manufacturers, we provide plastic parts injection molding, plastic injection moulding parts and etc.

Mould Design(2021年)

gmmoldtech — 2021-11-30T12:02:51+0900

https://www.gmmoldtech.com/products/mould-design.html

GM-TECH have a much experienced design team, familiar with China domestic, European, American, Japanese and other mold design standards, be able to use all kinds of software skillfully for mold and product designing. T

Features of Mould Design
There are more than 10 engineers who have much experience in plastic part design for injection molding:

GM-TECH have got a set of mature design process, from parts analysis, mold flow, structural analysis to process analysis.

Use full 3D design, With the design ability , can design more than 20 sets of complex molds monthly.

Specification of Mould Design
Emphasizesthe importance of early involvement in projects, designingand developing the product together with the customer.

Preparation of prototype part tools or SLA samples for pre-testing production conditionsof products.

Optimizethe mold structure designingand cooling system

DFM, Mould-flowanalysis

UG, Pro-E, AutoCAD, CAE, CAM

Designers: Average Working Experience: 12 years

Custom Plastic Injection Mold
Custom plastic injection mold has provided solutions to mass production of various parts and components such as household mould, medical mould, electronics mold, home appliance mould, etc. This personalized injection moulding design gives you a high level of production while minimizing the cost per unit. GM-TECH, an certified injection mold design company, has earned a high reputation for a professional design for manufacturing injection molding. We offer you high-quality, low-cost products and mold design services as follow:

In-house plastic injection mold design and engineering with professional guidance through every step of the process.

Our mold makers have rich experience with custom plastic mold design and tooling.

Quality-controlled experts are in a wide variety of capabilities, materials, and sizes in terms of plastic injection molding mold design.

GM-TECH is a professional injection mold maker china, we provide plastic parts injection molding, injection molded parts and etc.

Mould Component(2021年)

gmmoldtech — 2021-11-30T12:02:32+0900

https://www.gmmoldtech.com/products/mould-component/

Precision mold components are also a part of the mould. GM-TECH not only produces precision moulds but also provides customers with high-precision, low-cost mould parts. For example mould cores, inserts, sliders, lifter, wear plates, ejector pins, etc. Usually, processing accuracy can be controlled within + /-0.015mm. Delivery time is 2-3 weeks, DHL or FedEx will take about 3 days for shipping.

All the steel and tolerances of the parts are processed according to the drawings of the customers. In order to ensure the quality of parts processing of different types of injection moulding, we will provide customers with dimensional measurement report, hardness measurement report, material proof.

We also use new technology to do DLC surface treatment to guarantee the life of the parts.

Mould Component Features
All the steel and tolerances of the parts are processed according to the drawings of the customers. In order to ensure the quality of parts processing, we will provide customers with dimensional measurement report, hardness measurement report, material proof.

We also use new technology to do DLC surface treatment to guarantee the life of the parts.

Plastic mold components are also a part of the mould. GM-TECH, a reliable injection molded plastic parts manufacturer, not only produces precision moulds but also provides customers with high-precision, low-cost mould parts. For example: mould cores, inserts, sliders, lifter, wear plates, ejector pins, etc. Usually, processing accuracy can be controlled within + /-0.015mm. Delivery time is 2-3 weeks, DHL or FedEx will take about 3 days for shipping.

All the steel and tolerances of the parts are processed according to the drawings of the customers. In order to ensure the quality of parts processing, we will provide customers with dimensional measurement report, hardness measurement report, material proof.

We also use new technology to do DLC surface treatment to guarantee the life of the parts such as medical device molding parts.

Mould Component FAQs
What is the tolerance of parts?What is the tolerance of parts?
If the customer does not have special requirements, the processing is generally within + / - 0.02mm.

How long is the delivery time for mold part processing?How long is the delivery time for mold part processing?
Specific to see the difficulty of part, generally1-2 weeks.

How many days does it take to send parts to Germany?How many days does it take to send parts to Germany?
The fastest DHL express delivery in Europe usually takes about 3 days to reach each country in Europe, while FedEx in the United States usually takes about 3 days to arrive.

GM-TECH is a professional plastic injection mold manufacturers china, we provide metal insert molding, injection mold components, plastic parts injection molding, custom plastic injection molding and etc.