Feman Tooling Co.,Limited

What Are the Key Points of Precision Injection Molding?(2024年04月09日)

dgfeman — 2024-04-09T18:30:26+0900

https://www.dgfeman.com/what-are-the-key-points-of-precision-injection-molding.html

1. What is the impact of precision injection molding?
Precision injection molding will be affected by many related factors and environmental conditions, and the most basic are the four basic factors of plastic materials, injection molds, injection molding processes and injection molding equipment. In the early stage of designing plastic products, engineering plastics with corresponding performance requirements should be selected according to the application environment.

In addition, precision injection molding should be based on the selected plastic material, finished product dimensional accuracy, part weight, quality requirements and the expected mold structure to select the appropriate injection molding machine.

2. The key points of precision injection molding

1) Mold design

Whether the mold design is reasonable will directly affect the quality of plastic products. Therefore, the mold designer must have a wealth of design and injection molding experience, and must consider the relationship between these influencing factors and the injection conditions and their appearance factors when performing precision injection molding.

2) Prevent the error of molding shrinkage rate

Since the shrinkage rate will change due to the injection pressure, for single-cavity molds, the cavity pressure in the cavity should be as consistent as possible. As for the multi-cavity mold, the cavity pressure between the cavities should be very small. In the case of a single cavity with multiple gates or multiple cavities with multiple gates, the injection must be injected with the same injection pressure to make the cavity pressure consistent. For this reason, it is necessary to ensure that the gate position is balanced before precision injection can be carried out.

In order to make the cavity pressure consistent in the cavity, it is best to keep the pressure at the gate entrance consistent. The pressure balance at the gate is related to the flow resistance in the runner. Therefore, before the gate pressure reaches equilibrium, the runners should be balanced.

If you are looking for a reliable precision injection molding co, don't hesitate to contact us!

There are many 2k molding suppliers, but we are one of the best choices for you.

Injection Molding Material(2024年04月09日)

dgfeman — 2024-04-09T18:29:55+0900

https://www.dgfeman.com/injection-molding-material/

Injection molding materials are the foundation in the industrial filed. Feman tooling working with advanced technologies provide solutions for many applications in the injection molding industry.

Feman tooling provides different kinds of plastic injection molding materials solutions. With years working in the injection molding industry, we see many different kinds of plastic injection molding materials and are familiar with that are based on our long-term experience and professional technical knowledges. We serve in the automotive injection molding, packaging injection molding, medical injection molding, home appliance mold, etc. And these industries apply with different injection material due to the varied technical requirements form the product.

In the following, Feman will list some of the common material we use the daily such as ABS, PP, POM, PC, PVC, PA66, PMMA. Also, there is another engineering material whose features have special properties.For example, as one of abs injection supplier, we provide high-quality ABS plastic injection molding. This engineering material requires special processing during injection such as high percentage glass fiber material, high carbon fiber material, high temp. material, low temp. material, toxic gas raw material. And these final injection products may be used to the aviation field, smart home appliance field, national defense industry, special medical industry, etc. Let's get more to form the following.

Selecting the Right Material for Your Plastic Injection Molding
In the injection molding mold material marker, there may have thousands of materials. And even like normal ABS, it may perform differently due to the slightly variation of the composition form the chemical elements. To choose a right material for the products could make difference in the daily application.

Check the field of the products is used for and what exactly the position product stay in. According to the physical and chemical properties to choose the right injection molding material. In the national resin market, choose form the big brand company is the smart decision to guaranteed the performance.

For more information about types of plastic used in injection molding and what materials can be injection molded, please feel free to contact us!

Feman is a professional china mold maker, we provide injection molded parts, injection molding and etc. Want to know injection molding cost? Please contact us.

Packaging Plastic Injection Molding(2024年04月09日)

dgfeman — 2024-04-09T18:29:21+0900

https://www.dgfeman.com/injection-molded-plastic-packaging.html

Feman Tooling specializes in plastic & die casting plastic injection mold design and building, who offers full-service injection molding packaging manufacturing including plastic bottle mold design, prototype samples making, plastic molding tools building, reversion & Modification, accessory JIG & Fixture, plastic mold production up to 250T capacity and precision components making.

Injection molding packaging industry is under big demand for daily production, especially now under the COVID-19, the world is under huge pressure of packing goods. Feman tooling packing injection molding has its own advantages with the injection machine run 24 hours to meet the marketing requirements. More than just this, Feman packaging injection molding is making good injection molding bottle caps products. Injection molding bottle caps for bottles, injection molding bottles caps for cosmetics, Injection molding bottle caps for packaging goods, etc.

Feman Tooling is ISO9001:2000 certified plastic injection factory. our business philosophy is to exceed our customers' expectations and fulfill complete satisfaction. It's the foundation to maintain a mature and long term relationship with our valuable customers.

Injection Molding Packaging Process
The injection molding packaging process involves the production of packaging products using injection molding techniques. It begins with the design of the mold, such as Feman plastic bottle mold, which is crucial for achieving the desired shape and features. China is known for its expertise in packaging injection molding, offering cost-effective solutions. The process involves melting plastic materials, injecting the molten plastic into the mold cavity, and cooling it to solidify. This results in the creation of high-quality packaging products with precise dimensions, durability, and aesthetic appeal. Injection molding packaging is widely utilized in various industries, including food, beverage, cosmetics, and more, due to its efficiency and versatility.

What Products Can Packaging Injection Molding Make?
Packaging injection molding can produce a wide range of products, including injection molding bottle caps. China's Feman injection molded plastic packaging is renowned for its high quality and versatility. The process enables the production of various packaging items, such as containers, bottles, jars, tubes, trays, and closures. China's expertise in packing injection molding allows for the creation of custom shapes, sizes, and designs, catering to the specific requirements of different industries, including food and beverage, pharmaceuticals, cosmetics, and consumer goods.

For more information about plastic injection molding china and plastic molding price, please feel free to contact us!

Injection Mold Design(2024年04月09日)

dgfeman — 2024-04-09T18:28:49+0900

https://www.dgfeman.com/injection-mold-design.html

We do plastic injection mold design in China, along with plastic product design and development, and other tooling requirements. We offer a unique perspective in plastic injection mold and product design. Decades of injection mold design experience allow us to incorporate the "moldability" factor into our product designs and evaluations.

We can design for manufacturing injection molding as per your requests with competitive prices, as we have our own mold designers and injection mold factory in china. We would be very interested in discussing the possibilities of collaborating our design services with your manufacturing capabilities.

Plastic injection mold design services is one of most important parts of a success mold making project, For each of mold project, we will call out an internal kick-out meeting to decide the part layout, runner design, gating way, ejection method, cooling layout, etc. These would allow us to always design your mold with all of our intelligence resources instead of just by a single mold designer.

Our injection mold design engineering technologies include:

Pro/Engineer/UG (3D)
AutoCad (2D)
Moldflow analysis (Filling flow/Deform simulation)
Powermill&UG (CNC Programming)

We provide DFM reports and give customers an overall view on manufacturability and part design with our experiences and professional knowledges, and we are able to predict the potential risks and come up with optimized solutions.

For more information about injection mold china and plastic molding price, please feel free to contact us!

How Much is Injection Mold Generally?(2024年04月09日)

dgfeman — 2024-04-09T18:28:18+0900

https://www.dgfeman.com/how-much-is-injection-mold-generally.html

A customer contacted us by searching the plastic die mould manufacturer on the Internet and asked our customer service: "how much is the medical plastic die mould in general?" Generally speaking, if the structure is simple, the requirements are not too high, and the material is ordinary, the mold price will range from thousands yuan to tens of thousands yuan. As to the structure with higher requirements, the price will range from at least tens of thousands to even one hundred thousand.

If you need to know clearly how much the plastic die mould of this product you want to mass produce is, the first thing you need to do is to design the 3D drawing of the product, and then write down your detailed requirements for this product, so that the plastic die mould manufacturer can evaluate the exact cost and cycle of mold opening for you. If the 3D drawing is not finished so fast, a sample of the product can also be provided, and a professional plastic die mould manufacturer like Feman Tooling Co.,Limited. can also evaluate the mold customization cost and molding cycle of the product for you.

In conclusion, if you want to know how much the plastic die mould of the product you need to mass produce is, you need to provide the 3D drawing or sample of the product to the professional plastic die mould manufacturer to evaluate the cost!

For more information about custom plastic molding china and plastic molded parts, please feel free to contact us!

Home Appliance Plastic Injection Molding(2024年04月09日)

dgfeman — 2024-04-09T18:27:48+0900

https://www.dgfeman.com/home-appliance-mould.html

With the improvement of people's living standards, we can see all kinds of home appliances around. For example, television, air-conditioner, washing machine, computer and etc. And now more and more smart home appliances appear with the development of the Internet and artificial intelligence. Modern people are under the trend of replacing a smart home appliance with china home appliance molds.

Feman supplies appliance plastic injection molding and has a close connection with home appliance tooling at a very early age and now has a unique skill in building the home appliance mold. High-quality china home appliance mould, good technical support, sound after-sales plastic injection moulding services and sincere attitude have been well appraised by new and old home appliance customers. Feman china home appliance mold has a sound organization and a team of experienced and efficient employees! Adhering to the business philosophy of "High quality, short lead-time and best service", we sincerely welcome customers from all over the world to visit our electrical appliance injection molding factory for mutual benefit, sincerity and pragmatism. People are the essence of cooperation. We never stop self-study and self-improvement. Honesty and trust play a very important role in Feman, and we will work hard together with our employees, customers, suppliers, cooperation factories for a brilliant future to provide high-quality home appliance mold. We are a dedicated happy team with industrious work and dedicated to providing high-quality china appliance plastic molding. Let's work together for the people's smart future.

For more information about custom plastic injection molding china and injection molding price, please feel free to contact us!

Heat Treatment of Precision Plastic Injection(2024年04月09日)

dgfeman — 2024-04-09T18:27:10+0900

https://www.dgfeman.com/heat-treatment-of-precision-plastic-injection.html

In the process of heat treatment, the precision plastic injection moulding often produces deformation. In order to prevent this kind of problem, as long as we grasp the deformation law, analyze the causes, and adopt different methods to prevent the deformation of the mold, it can be reduced and controlled. In general, the following methods can be adopted to prevent the heat treatment deformation of precision injection mold.

(1) Reasonable selection of materials: the micro deformation die steel with good material should be selected for the precision plastic injection mold, the mold steel with severe carbide segregation should be reasonably cast and carried out, and the large and non-casting mold steel can be treated with solid solution double refinement heat treatment.

(2) The mold structure design should be reasonable, the thickness should not be too different, and the shape should be symmetrical. For the large deformation mold, we should grasp the deformation pattern and reserve the processing allowance. For the large ones, the combined structures of precision injection mold can be adopted.

(3) The precision injection mold should be pre-heat treated to eliminate the residual stress in the process of mechanical processing.

(4) Reasonably select the heating temperature and control the heating speed. For the precision injection mold, slow heating, preheating and other balanced heating methods can be adopted to reduce the heat treatment deformation of the mold.

(5) Under the condition of ensuring the hardness of the mold, the pre-cooling, staged cooling quenching or warm quenching process of the injection mold should be adopted as far as possible.

(6) For precision injection mold, vacuum heating quenching and cryogenic treatment after quenching shall be adopted as far as possible if the premise permits.

(7) The precision of some precision and complicated dies can be controlled by pre-heating treatment, aging heat treatment, quenching, tempering and nitriding heat treatment.

(8) When repairing sand hole, air hole, wear and other defects of mold, cold welding machine and other repair equipment with small heat influence shall be selected to avoid deformation in the repair process.

There are many mold manufacturers in china, but we are one of the best choices for you.

For more information about injection molding services, please feel free to contact us!

Gas Assisted Injection Molding(2024年04月09日)

dgfeman — 2024-04-09T18:26:27+0900

https://www.dgfeman.com/gas-assit-injection-molding.html

Gas-assisted injection (injection) molding, also known as gas injection moulding process, is a new injection molding process . It is one of the most important developments in the injection molding industry since the advent of reciprocating screw injection machines.

Gas Assist Injection Molding Principles And Applications
Gas assist molding process is an extension of injection molding,unlike 2 shot molding process. It is developed on the basis of injection molding technology and structural foam injection molding. it can also be considered as a composite of injection molding and hollow molding. In this sense, it can also be called "Hollow injection molding". The principle is to replace the resin pressure in the cavity with a relatively low-pressure gas during the pressure holding phase of the original injection molding.

Gas injection moulding, unlike unscrewing mold mechanism, can be achieved by simply adding an air supply device to the existing injection molding machine. The gas supply device is composed of an air pump, a high-pressure gas generating device, a gas control device, and a gas nozzle. The gas control device uses a special compressor to continuously supply gas, and is controlled by an electronic control valve to keep the pressure constant. There are usually 3 levels of pressure. A set of gas control device can be equipped with multiple injection molding machines.To achieve this, whole gas assisted injection molding process required closely connections.

The gas generally used is nitrogen. Gas pressure and gas purity are determined by the shape of the molding material and product. The pressure is generally 5 ~ 32MPa, the highest is 40MPa.

If you are looking for a reliable mold manufacturers in china, don't hesitate to contact us!

For more information about plastic injection molding parts, please feel free to contact us!

PP Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:10:51+0900

https://www.dgfeman.com/pp-injection-molding/

Polypropylene, abbreviated as PP, is a colorless, odorless, non-toxic, translucent solid substance. Polypropylene (PP) is a thermoplastic synthetic resin with excellent properties. It is a colorless, translucent, thermoplastic and lightweight general-purpose plastic. With chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high-abrasion processing properties, etc., this has made polypropylene quickly used in machinery, automobiles, electronic appliances, construction, textile, packaging , agriculture, forestry, fishery and food industry.

In recent years, with the rapid development of China's injection molding packaging, electronics injection molding, automotive injection molding and other industries, it has greatly promoted the development of China's industry. And because of its plasticity, polypropylene materials are gradually replacing wooden products, and high strength and toughness and high wear resistance, which is same with nylon made by our nylon plastic injection molding, have gradually replaced the mechanical functions of metals.

Properties of pp plastic injection molding
Polypropylene is a non-toxic, odorless and tasteless milky white highly crystalline polymer with a density of only 0.90- "0.91g / cm3. It is one of the lightest varieties of all plastics. It is particularly stable to water and absorbs water in water. The rate is only 0.01%, and the molecular weight is about 81.15 million. The moldability is good, but because of the large shrinkage (1% to 2.5%), thick-walled products are easy to sag, and it is difficult to meet the requirements for some parts with high dimensional accuracy , Good surface gloss.

PP Injection Molding Requirement

Drying Temperature 60-90 °C

Drying Time 2.0-6.0 hr

POM Plastic Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:09:52+0900

https://www.dgfeman.com/pom-plastic-injection-molding/

POM injection molding, Polyacetal, also known as acetal or polyoxymethylene (POM), is a formaldehyde-based, semi-crystalline engineering thermoplastic containing the functional group of a carbon bonded to two -OR groups. Other names of POM are Polyformaldehyde, Polymethylene glycol, Polyoxymethylene glycol. It is 100% recyclable.

In pom plastic injection molding factory, POM resin are widely used in the production of precision plastic molding parts for applications demanding good dimensional stability and sliding properties. Some of them include: Automotive, Electrical & electronic, Industrial, Drug Delivery ect.

The polymer serves as an alternative to metals thanks to its low friction & wear characteristics and its excellent balance of mechanical and chemical properties.

Properties of POM Injection Molding
The tensile strength of POM reaches 70MPa, the water absorption is small, the size is stable, and the gloss is better than nylon. POM is a highly crystalline resin, which is the toughest among thermoplastic resins. With heat resistance, bending strength, fatigue resistance strength is high, wear resistance and electrical properties are excellent. POM properties: specific gravity 1.43 performance values ??m.p. 175 ° C tensile strength (yield) 70MPa Elongation (Yield) 15% (at break) 15% impact strength (no notched) 108KJ / m2 (with a notch) 7.6KJ / m2

Pom Processing Temperature in POM Plastic Injection Molding Factory

Drying Temperature 60-80 °C

Drying Time 2.0-6.0 hr

PC Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:08:54+0900

https://www.dgfeman.com/pc-injection-molding/

PC is classified as a thermoplastic, and the name has to do with the way the plastic responds to heat. Thermoplastic materials become liquid at their melting point (155 degrees Celsius in the case of Polycarbonat). A major useful attribute about thermoplastics is that they can be heated to their melting point, cooled, and reheated again without significant degradation. Instead of burning, thermoplastics is like Polycarbonate liquefy, which allows them to be easily injection molded and then subsequently recycled.

PC is commonly used for plastic lenses in eyewear, in medical devices, automotive components, protective gear, greenhouses, Digital Disks (CDs, DVDs, and Blu-ray), and exterior lighting fixtures.

The PC injection molding, unlike pom injection, most often produces parts by polycarbonates and their blends. Since polycarbonate is highly viscous, it is usually processed at high temperature to reduce its viscosity. In this process, the hot polymer melt is pressed through into a mold with high pressure. The mold when cools, gives the molten polymer its desired shape and characteristics. This process is generally used to manufacture polycarbonate bottles, plates etc. Since polycarbonate is a poor-flowing plastic, wall thickness should not be too thin.

Properties of pc abs injection molding
Mechanical performance: high strength, fatigue resistance, dimensional stability, and small creep (also rarely changes under high temperature conditions);

Heat aging resistance: The enhanced UL temperature index reaches 120 ~ 140 ℃ (long-term outdoor aging is also very good);

Solvent resistance: no stress cracking;

Stability to water: easy to decompose under water at high temperature (use caution in high temperature and high humidity environment);

Insulation performance: excellent (moisture and high temperature can also maintain stable electrical performance, is an ideal material for manufacturing electronic and electrical parts);

Dielectric coefficient: 3.0-3.2;

Arc resistance: 120s;

Form ability: injection molding or extrusion of ordinary equipment.

Can Polycarbonate Be Injection Molded
Yes, polycarbonate (PC) can be effectively injection molded. PC is a popular engineering thermoplastic known for its exceptional strength, impact resistance, and optical clarity. The injection molding process for polycarbonate involves melting the PC resin pellets and injecting the molten material into a mold cavity under high pressure. Once cooled and solidified, it results in the production of high-quality and durable PC parts. Feman China specializes in PC injection molding, offering expertise in designing and manufacturing molds specifically for polycarbonate. PC injection molding finds applications in automotive, electronics, medical devices, and various other industries where strength, transparency, and impact resistance are essential.

Polycarbonate Plastic Injection Molding Applications
Polycarbonate (PC) plastic injection molding is widely used in various industries due to the exceptional properties of this engineering thermoplastic. China's Feman specializes in PC injection molding, offering expertise and reliable solutions. PC injection molding allows for the production of high-quality parts with excellent strength, impact resistance, and optical clarity. The process involves melting the PC resin pellets and injecting the molten material into a mold cavity under high pressure. Once cooled and solidified, it yields durable and precise PC parts.

Polycarbonate injection molding finds applications in automotive components, electrical enclosures, consumer electronics, medical devices, and more. Its strength and impact resistance make it suitable for parts that require durability and protection against impacts. The optical clarity of polycarbonate makes it a popular choice for transparent and light-transmitting applications, such as lenses, windows, and display panels. The versatility of PC allows for intricate designs and complex geometries, meeting the diverse requirements of different industries.

China's Feman excels in PC injection molding, ensuring the production of high-quality and reliable polycarbonate parts for a wide range of applications. Whether it's automotive, electronics, or other industries, polycarbonate injection molding offers durability, strength, optical clarity, and design flexibility.

What Is The Difference Between CNC And Injection Mold Polycarbonate?
The main difference between CNC (Computer Numerical Control) machining and injection molding for polycarbonate lies in the manufacturing process and the level of complexity they can achieve. In CNC machining, a solid block of polycarbonate is cut and shaped using computer-controlled tools to create the desired part. It is a subtractive process that is suitable for low-volume production and complex, custom designs. On the other hand, injection molding involves melting the polycarbonate resin and injecting it into a mold cavity under high pressure. It is a highly efficient process for high-volume production, offering precise replication of intricate designs and faster production cycles. China's Feman specializes in PC injection molding, providing cost-effective and reliable solutions for a wide range of applications.

As one of the most professional injection mold manufacturers, we provide plastic molding china, injection molded parts, injection molded parts, polycarbonate injection, molding polycarbonate, polycarbonate injection molding and etc. Want to know can polycarbonate be injection molded or more? Please contact us.

Other Materials Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:08:27+0900

https://www.dgfeman.com/other-materials-molding.html

Other Materials Injection Molding
Other materials molding

Here we list some common injection molding materials for plastic injection molding parts.

PE, Polyethylene is a lightweight, durable thermoplastic with variable crystalline structure. It is one of the most widely produced plastics in the world. Polyethylene is used in applications ranging for films, tubes, plastic parts, laminates, etc. in several markets (injection molding packaging, automotive injection molding, electrical injection molding, etc.)

Polystyrene (PS) plastic is a naturally transparent thermoplastic that is available as both a typical solid plastic as well in the form of a rigid foam material. PS plastic is commonly used in a variety of consumer product applications and is also particularly useful for commercial packaging, laboratory ware, automotive, and Electronics.

General Purpose Polystyrene (GPPS) and High Impact Polystyrene (HIPS) are probably the most commonly used PS resins for injection molding. GPPS is clear, but brittle (think of a CD jewel case) while HIPS is opaque and much less brittle.

Acrylonitrile Styrene (AS) - A group of copolymers that have the transparency of polystyrene, but with improved resistance to solvents and stress cracking. AS is used in applications ranging for Electrical/Electronic Applications, Appliances, Construction Applications, Decorative Parts, Automotive Applications, Piping, Telecommunications, Industrial Applications, Non-specific Food Applications.

Thermoplastic Polyurethane or TPU is referred to as the bridge between rubbers and plastics. The material appears rubber-like, which means it can be extremely flexible, durable and smooth to the touch. All these properties and compound versatility makes TPU widely used in many industries for coatings, components and customer goods. TPU exhibits high-performance properties if processed correctly through injection molding, the important factors are mold and nozzle temperature, pressure and plasticizing energy. If the plastic injection molding process or an object's design don't suit the material, it may cause damage and shrinkage of parts.

As a professional plastic mold manufacturer china, we provide plastic injection molding service, injection molded parts, common plastics for injection molding, common injection molded plastics, common injection molding plastics and etc. Want to know plastic molding price or more? Please contact us.

Nylon Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:07:40+0900

https://www.dgfeman.com/nylon-injection-molding/

Nylon is commonly referred to using the chemical designation “PA” (e.g., PA 6 or PA 6/66) and is most widely available in black, white, and its natural color (off-white or beige). Perhaps the most common variant for engineering applications is Nylon 6/6. Nylon 6/6 can be extruded (melted and forced through a die) and is also a suitable plastic for both injection molding and 3D printing. It has a high melting temperature, making it an excellent substitute for metals in high-temperature environments (e.g., under the hood of a vehicle). The material’s downside is that it has relatively low-impact strength (even when compared to other plastics). Of note, the impact strength of Nylon can be improved by a process called “conditioning.” For this reason, as well as the ease with which Nylon can be combined with other materials to enhance its strength, it is important to check the material properties of the specific Nylon material you are using.

The nylon plastic injection molding are quick, providing an economical interest,which is similar to the pom plastic injection molding. Polyamide 6 and Polyamide 66 answer the requirements of numerous applications in the varied markets. PA6, PA66 Replace Metal in Automotive Applications Electrical & Electronics Applications-Flame Retarded PA Works Well! Good Surface Aspect in Consumer Applications Food Packaging with PA6 & PA66.

Properties of Nylon Injection Molding
High mechanical strength, good toughness, and high tensile and compressive strength.

The fatigue resistance is outstanding, and the parts can still maintain the original mechanical strength after repeated repeated bending.

High softening temp. and heat resistance.

Smooth surface, low friction coefficient, wear-resistant.
Has excellent electrical properties.

Self-extinguishing, non-toxic, odorless, good weather resistance, inert to biological erosion, good antibacterial and anti-mildew ability.

The parts are light in weight, easy to dye and easy to form. Because of its low melt viscosity, it can flow quickly for easy filling.

Nylon Molding Requirement

Drying Temperature 60-80 °C

Drying Time 4.0-6.0 hr

Medical Plastic Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:07:10+0900

https://www.dgfeman.com/medical-plastic-injection-molding.html

Feman medical parts are essential component of Feman tooling. There is special department in-house that only service for the medical customers. A team with professional skills and full experience form plastic injection mold design, CNC & EDM group and project management will take on an accurate care on all the Feman medical products. Customers no need to worried about the quality and precision of the medical injection molding.

As one of the medical plastic injection molding companies, we provide injection mold service china, injection molded parts, medical plastic molding, medical injection moulding, medical plastic injection molding and etc. Want to know plastic molding price or more? Please contact us.

Insert Molding(2024年01月25日)

dgfeman — 2024-01-25T16:06:41+0900

https://www.dgfeman.com/insert-molding.html

Insert molding process is kind of a special injection molding style in the traditional molding process. Now are wildly used in the injection industry. In our daily life that we can see many plastic products are produced together with the metal parts. The traditional way to achieve this, people first make the plastic parts, the metal parts that will be combined with the plastic parts by Laser, hot melting etc. This is a kind of tedious process and required huge manual works. With insert moulding occurs, we no-longer worried about this process. Normally the metal parts will be put together into a mold on the injection machine. The metal parts will be hold inside the mold by some special structure or fixture and then will be molded together with plastic.

Insert injection molding process, unlike unscrewing mould, is wildly used in many industries. Feman tooling is an expert making the insert molding. With years of injection experience we successfully making the products for many customers and is highly appreciated.

Feman is a professional china mold factory, we provide injection molded parts, injection molding and etc. Want to know injection molding cost? Please contact us.

Plastic Injection Molding(2024年01月25日)

dgfeman — 2024-01-25T16:06:12+0900

https://www.dgfeman.com/injection-molding-style/

With the development of plastic injection molding industry, the tradition plastic injection ways are no longer meet the requirements of moderns products.

All these special products drives the reformation of injection industry. After that we see varied injection molding style now. The following pages Feman will show you the strength in insert moulding, plastic parts manufacturing process, 2k plastic injection moulding ( over mold & rotary table ) and unscrewing mold.

For more information about types of plastic moulding process and plastic injection moulding process steps, please feel free to contact us!

There are many injection mold manufacturers china, but we are one of the best choices for you.

What are the Advantages of High and Low Plastic Injection Speed?(2023年12月08日)

dgfeman — 2023-11-08T17:08:19+0900

https://www.dgfeman.com/what-are-the-advantages-of-high-and-low-plastic-injection-speed.html

The most important process conditions in the plastic injection process are the temperature, pressure, velocity and corresponding action time of plasticizing flow and cooling. These factors influence and restrict each other, such as increasing melt temperature and mold temperature, the injection pressure and speed can be reduced, otherwise the plastic injection pressure and speed can be increased.

The core of the influence of various process conditions is the viscosity change of plastics, which is very important for the reasonable selection of injection parameters and the mutual influence.

The advantages of injection speed in injection molding process are as follows:
Improving the flow of plastic is conducive to the molding of thin-walled parts;

Improving the surface gloss of the products;
Improving the strength of the welding line, making the weld lines not obvious;
Preventing cooling deformation, etc.

The advantages of low-speed injection in the plastic injection process are as follows:
Preventing the flash of molding products;
Preventing the occurrence of spray and flow patterns;
Preventing the occurrence of combustion printing;
Preventing the occurrence of gas inclusion in the plastic melt;
Preventing the formation of molecular orientation deformation.

The advantages of high-speed injection are also the disadvantages of low-speed injection, and vice versa. Therefore, the respective advantages and disadvantages of low-speed plastic injection process can be fully utilized in the injection process, which can make full use of their advantages and avoid their disadvantages, so as to ensure the quality of the plastic injection products and the cost-saving of the process.

It is commonly referred to as multi-stage plastic injection china technology, which has been widely used in modern plastic injection molding machines. At present, most of the medium-sized and above injection molding machines have five to six levels of injection pressure and speed changes and three to four levels of packing pressure changes (because the melt has filled the cavity in the packing stage, the feeding material of the melt flowing into the cavity through the packing pressure is limited, so the effect of packing speed is not great).

If you want to know more about what is injection speed in injection molding, please visit our website.

Now the injection molding price is reasonable, if you have needs, please contact us.

Uscrew Injection Molding(2023年12月07日)

dgfeman — 2023-11-08T17:07:37+0900

https://www.dgfeman.com/uscrew-injection-molding.html

Unscrewing cores injection molding, as its name implied, there is the thread in the plastic part for easy assemble and connection with other screw parts. Unscrewing injection mold design is common in our daily life as we can see the caps from our bottles. This is kind of a very basic and normal molding product from Feman unscrewing mold manufacturer and unscrewing mold supplier, a pioneer of injection moulding die manufacturer .

The Introduction of Unscrewing Mould
Unscrew molding is a very important form of plastic injection molding china. Unscrew molding technology is becoming more and more mature in China unscrewing mould design manufacturer. However, many mold factories cannot really master the technical essentials. The injection mold unscrewing mechanism has very strict requirements for the entire mold manufacturing and processing because of their assembly performance. Unscrew mold is divided into internal thread mold and external thread mold. Externally threaded molds can generally be realized by sliders in the mold, but the precision is very high. Internally threaded molds generally require the cooperation of the core pulling structure.

Feman, China unscrewing mold supplier, specializes in manufacturing unscrewing mould. Years of industry experience have given us a deep understanding and knowledge of unscrewing mold. We have made many kinds of packaging lids, pipes, connectors. If you are looking for a real unscrew mold manufacturer, please choose us. We will serve you the best, high quality unscrewing mold mechanism and products.

Auto Unscrewing Injection Mold Design Solutions
Auto unscrewing injection mold design solutions are used to produce threaded or screw-shaped plastic parts. These molds incorporate mechanisms that automatically rotate the mold core during the ejection process to release the threaded part from the mold. The unscrewing mold design involves the integration of specialized components, such as hydraulic or mechanical systems, to achieve controlled and precise rotation. This design ensures accurate thread formation and eliminates the need for manual unscrewing. Unscrewing molds offer efficient production of threaded plastic components, providing design flexibility and reducing assembly time. By utilizing unscrewing mold design, manufacturers can streamline the production process and achieve high-quality threaded plastic parts with ease.

Injection Mold Unscrewing Mechanism
A slider mechanism in injection molding is a specialized feature in the design of molds used in injection molding. It allows for the production of threaded or screw-shaped plastic parts by automatically rotating the mold core during the ejection process. The unscrewing mechanism typically consists of a rotating assembly integrated into the mold, which is actuated by hydraulic or mechanical systems. As the mold opens, the rotating assembly rotates to release the threaded part from the mold. This mechanism ensures precise thread formation, eliminates the need for manual unscrewing, and enables efficient production of threaded plastic components. It provides enhanced design flexibility and facilitates the production of high-quality threaded parts in injection molding processes.

As a reliable injection mold maker china, we can offer sorts of plastic injection molding parts for sale, if you are interested, please contact us.

Two Shot Injection Molding Process(2023年12月06日)

dgfeman — 2023-11-08T17:07:05+0900

https://www.dgfeman.com/two-shot-injection-molding-process.html

The cover material is injected above, below, around or inside the substrate during the two shot injection molding process to form a complete part. This process can be done through multiple injections or insert injection molding, usually using an elastomeric covering material. During the two shot injection molding process, the core must be moved or moved to another cavity, or alternatively, the core must be fed into another injection molding machine.

Backlash, nozzle holes, air outlets and mold surface texture are key elements in the design of the two shot cheap injection molding process.

Backstop between substrate and cover material is critical to bonding effectiveness, progressive thinning or linting of the projectile cover material should be avoided. Cover material that is too thin can lead to weak bonds, delamination and crimping. Excellent backstop design should isolate the cover material from the substrate.

Nozzle orifice design is equally important to the success of two shot injection molding. The ratio of runner length to wall thickness is the leading factor in the bonding process. Based on experience, the ratio should not exceed 150:1, and should be kept around 80:1 when developing two shot molding process.

In order to minimize the flow, the nozzle holes should be located at the point of maximum wall thickness. When using TPE resin, the size of the nozzle orifice should be paid attention to. Materials such as TPU require large bore nozzles to accommodate high viscosity, material degradation should be prevented due to high shear. Materials such as SEBS require higher shear velocities for optimal flow rates, It is better to use a small bore nozzle at the beginning and adjust the nozzle size after the first sampling.

As with the nozzle holes, the air outlet is an important factor in the bonding process. It is difficult to control the amount of air left, but if you don't know how to control it, the bond may not be strong enough, and there may be a furring phenomenon. The depth of the air outlet is extremely critical to preventing frizz. Depending on the viscosity of the covering material, the outlet depth should be between 0.0005 and 0.001 inch.

As a mold manufacturer china, we can offer sorts of related products for sale, if you have needs, please contact us.

Tool Building(2023年12月05日)

dgfeman — 2023-11-08T17:06:26+0900

https://www.dgfeman.com/tool-building.html

As a good reputation manufacturer in China, we here share the basic injection mold building process in our company:

1. Products design department provides product information to injection mold design department, injection molding mold designers complete cost analysis in two working days, and provide to R&D manager.

2.R&D department release "Mold Making Apply" to plastic injection mold design department after confirming the project.

3. Injection mold designers organize relevant personnel to review the project based on the product information, including product structure, mold structure, cooling system, runner, slag, venting, etc. in plastic injection molding process

4. After evaluation, injection mold designers begin to design the plastic injection mold, including 3D drawing correction, 3D parting, mold parts assembly drawing, EDM drawing, electrode drawing etc., and organize relevant personnel to evaluate those drawings, then issue to plastic injection mold making department.

5. Injection mold makers evaluate and study the drawings, and order mold materials if there is no objection, otherwise, communicate with the plastic injection mold designers.

6. Plastic injection mold manufacturers china inspect the mold materials in time after the materials arrive to injection mold factory china, and arrange technicians to do locksmith works, including turning, grinding, milling, screw holes, water carrying hole, center hole, CNC roughing, etc. The technicians should pay attention to the precision of each right-angle sides, avoid empty of the center hole and each production base, roughing margin etc. Then outsource each mold part to heat treatment promptly.

7.After heat processing, plastic injection mold maker must detect its hardness and metallurgical analysis. Generally, the core hardness 46-50HRC, for uniform distribution of 9 points, requiring its hardness differ is less than 2HRC. Metallurgical analysis should be done for the injection mold core prior to processing to make sure there is no segregation, scars, etc.

8. Electrode processing, there are fine and rough processing, fine male spark is 0.05-0.08, rough male spark is 0.2-0.3 (subject to the actual situation). Be sure to pay attention to each processing benchmarks, and detect electrodes after processing finished.

8.Before finishing, must make right angle for the mold core, the vertical degree should less than 0.02 mm, finish degree 1.6.

10. For line cutting, please note that all parts' base, enlarge 0.02mm for the insert hole and center hole as tolerance clearance, for non-standard thimble, the tolerance clearance is 0.04mm of the actual thimble size.

11. Mold core finishing, based on the benchmarks after making right-angles, typically leaves 0.02 mm die as a margin (without considering tool wearing).

12.EDM processing, process according to the drawings' size, fine 0.05-0.08, rough 0.2-0.3 (subject to the actual situation), pay attention to the benchmarks in processing, for sparks processing, the leave a margin of 0.03-0.05 mm.

13. The runner surface must be polished to achieve Ra6 or Ra7 finishing, the surface does not allow spark or knife pattern to exist.

14. Before assembling the plastic injection molding parts, the mold maker must do a comprehensive inspection for all related parts to make sure everything is in a good condition, and do cleaning and anti-rust treatment. Then fill "Mold Inspection Summary" form.

15. In tryout, injection mold designers, plastic mold makers and die casting workshop personnel should go to the site, making analysis and solution of abnormal in casting tryout, improving the plastic injection mold and die casting process according to the results, and fill "Mold Tryout Report".

16. By 100-150 cycle time, the tryout products are defect-free, the production department make production schedule, the technicians track the production processes, and feedback yield to the plastic injection mold making department.

17. After tryout, plastic injection mold making department apply for storage with the forms of "Mold Making Apply" and "Mold Making Inspection".

We are ready and looking forward to cooperate with your next project, Contact Us Now, you will be satisfied to choose us as your partner in plastic parts manufacturing process.

The Effect of High Temperature in Injection Molding Process on Injection Molded Parts(2023年12月04日)

dgfeman — 2023-11-08T17:05:28+0900

https://www.dgfeman.com/the-effect-of-high-temperature-in-injection-molding-process-on-injection-molded-parts.html

Ⅰ. The impact of temperature on injection molded parts during the injection molding process
Manufacturers of injection molded parts know that during the plastic injection molding process, if the temperature is too high or too low, it will have an adverse effect on the molded injection parts. Seriously, it may directly cause the molded injection parts to be scrapped. Therefore, the temperature control in the injection molding process is very important.

So what effect will the high temperature in the injection molding process have on the injection molded parts? Let Feman injection manufacturing give you some examples.

Ⅱ. The impact of high temperature in injection mold tooling china processing on injection molded parts

1. Too high temperature will reduce the viscosity of the oil
When the temperature of injection molding is too high, the viscosity of the oil will decrease, and leakage may occur. At this time, the volumetric efficiency of the pump and the efficiency of the entire system will also be significantly reduced. If the viscosity of the oil decreases, the oil film of the moving parts such as the slide valve will become thin or will be cut. At this time, the frictional resistance will also increase, which will increase the phenomenon of wear.

2. Accelerate the deterioration of oil due to oxidation
Process of high temperature injection molding will accelerate the oxidation and deterioration of the oil, resolve the bituminous substance, and reduce the service life of the hydraulic oil. The resolved substance will block the damping orifice and the gap-type valve port, which will cause the pressure valve to become stuck and not work. The metal pipe stretches and bends, and even breaks.

3. Cause the work quality of injection molded parts to deteriorate
Excessive heating process of the custom plastic injection molding will result in poor working quality of the injection molded parts, and the dissolved air in the oil will escape and air pockets will appear, which will reduce the working performance of the hydraulic system.

4. The phenomenon that causes thermal deformation of the machine
In the hydraulic components, the fitting clearance of parts with different thermal expansion coefficients becomes smaller and jams, which will cause work failure, seriously affect the transmission accuracy of the hydraulic system, and cause the work quality of injection molded parts to deteriorate.

PVC Injection Molding(2023年12月03日)

dgfeman — 2023-11-08T17:04:51+0900

https://www.dgfeman.com/pvc-injection-molding/

Polyvinyl Chloride (PVC or Vinyl) is a high strength thermoplastic material widely used in applications, such as pipes, medical devices, wire and cable insulation...the list is endless. It is the world's third-most widely produced synthetic plastic polymer.

Polyvinyl Chloride can be injection molded just like other plastics but the inclusion of chlorine in the material complicates the process. This is because melted PVC can give off a corrosive toxic gas. Accordingly, shops need to be equipped with sufficient ventilation systems. Those that aren’t are likely to be hesitant to work with the material. Additionally, special corrosive resistant materials like stainless steel or a chrome plating are required for the mold tool during pvc plastic molding. Shrinkage in PVC tends to be between one and two percent but can vary based on a number of factors including material durometer (hardness), gate size, holding pressure, holding time, melt temperature, mold wall thickness, mold temperature, and the percentage and type of additives.

Properties of PVC Injection Molding
General performance PVC resin is a white or light yellow powder with a relative density of 1.35-1.45. The hardness of the product can be added by PVC transparent board PVC transparent board. Adjust the number of plasticizers. Pure PVC has low water absorption and permeability.

Thermal properties: The thermal stability of PVC is very poor. It begins to decompose at 140 ° C and the melting temperature is 160 ° C. The coefficient of linear expansion of PVC is small, and it is flame retardant, and the oxidation index is as high as 45 or more.

Electrical properties: PVC is a polymer with better electrical properties, but due to its greater polarity, electrical insulation is not as good as PP and PE. Dielectric constant, dielectric loss tangent and volume resistivity are large, corona resistance is not good, generally suitable for low-voltage and low-frequency insulating materials.

Can PVC be injection molded?
PVC can adopt injection molding, extrusion, blow molding, calendering, plastic lining, foaming and other molding processes. For plasticized PVC products, plasticizer and other additives shall be added to PVC powder or granular materials for premixing and plasticization before molding. When the plasticized plastic is suitable for processing, such as injection molding and basic processes, basic granulation is required. When used in the calendering process, it needs to be pressed into a soft plate before. Injection molding is mainly used for UPVC.

What Temperature Does PVC Melt ?
PVC melting temperature during processing is a very important process parameter, if pvc molding temperature is not appropriate will lead to the problem of material decomposition.

PVC has poor stability to light and heat. What is the pvc plastic melting point? PVC injection begins to soften at 65-85 °C, above 170C into a viscous flow state, 140 °C begins to decompose a small amount, with the increase of temperature decomposition rate increases, above 190°C a large amount of HCL gas is released. PVC has a chlorine content of up to 56%, so it is flame retardant and self-extinguishing. PVC has good dielectric properties and is an excellent electrical insulation material. In addition, PVC plastic affordable injection molding is a polymer with poor thermal stability, which can gradually liberate HCl under the action of light and heat, and at the same time, in the presence of forces, oxygen, ozone, cyanide chloride and some active metal (such as copper, zinc, etc.) ions, the degradation rate is greatly accelerated.

PVC Plastic Injection Molding Requirement
Injection Molding Condition Value Unit for reference
Drying Temperature 60-90 °C
Drying Time 4.0-6.0 hr
Suggested Moisture Content <=0.30 %
Rear Barrel Temperature 160-180 °C
Middle Barrel Temperature 170-190 °C
Front Barrel Temperature 180-200 °C
Nozzle Temperature 180-200 °C
Mold Temperature 40-60 °C

Prototype Samples Making(2023年12月02日)

dgfeman — 2023-11-08T17:04:12+0900

https://www.dgfeman.com/prototype-samples-making.html

Prototype samples of plastic injection molding products are basic working samples, mockups, models, or just simulations of actual products, and other forms (final products and variants) are developed on this basis.

The main motivation for prototyping is to verify the design of the actual product. Sometimes, creating prototype samples is called implementation, because this is the first step in converting a virtual or conceptual design into an actual physical form.

It is a preliminary version of the actual product developed for the following purposes:

Verify plastic mold design,
Introduce to investors or licensees
Intellectual Property Protection,
Eliminate the knots in manufacturing,
Test and improve products.

We could make a prototype sample while if it is necessary. Our products have good quality with competitive prototype plastic injection molding price, if you need plastic injection molding products, please contact us without hesitation.

As a china custom plastic molding company, we will do our best to meet all the needs of customers.

Principles of Injection Molding Process(2023年12月01日)

dgfeman — 2023-11-08T17:03:41+0900

https://www.dgfeman.com/principles-of-injection-molding-process.html

Principle of Injection Moulding Process
Injection molding is a process in which plastic melt is injected into the closed mold cavity at high speed under high pressure, and then plastic injection products with the same shape as the cavity come into being after cooling shaping.

Custom injection molding China must meet two molding requirements: the plastic must be injected into the injection molding mold cavity in a molten state, and the injected plastic melt must have sufficient pressure and flow speed to fully fill the mold cavity. Therefore, injection molding must have basic functions of plastic plasticization, melt injection and packing injection molding and so on.

Plastic plasticizing: During the plasticization process of injection molding, the solid plastic moves forward along the direction of the screw channel continuously through the transport of rotating screw. Dispersive mixing of screw and thread reacts and heats up with heating and compaction, transformed into viscous plastic melt with uniform density, viscosity, composition and stable and uniform distribution.

Injection molding process: The plasticized plastic melt is stored in the reservoir of the barrel and the screw moves axially during injection. Under the action of the screw injection pressure, plastic melt flows at a certain rate through the nozzle installed in the front of the barrel, the mold casting system and so on, and is injected into the cavity of the mold.

Cooling shaping: plastic melt injected into the cavity overcomes various flow resistance and fills the whole cavity, suffering huge pressure from the mold cavity which has the tendency to drive the plastic melt flow back to the cylinder. Due to the cooling effect of the mold cavity, the plastic melt generates cooling shrinkage.

At this point, the injection screw continues to provide pressure to keep the plastic melt filled cavity without backflow, and replenishes plastic melt to cavity properly, filling up the cavity shrinkage space until the plastic melt is gradually cooling solidified into products.

Details determine success or failure has become the standard pursued by every industry. Nowadays, the precision of injection molding products is getting higher and higher and the quality requirements are becoming more and more strict, which requires the manufacturers of injection molding products to strictly control and supervise every link in the production process.

Several Common Problems and Solutions of Plastic Injection Parts(2023年10月08日)

dgfeman — 2023-09-18T18:03:37+0900

https://www.dgfeman.com/plastic-injection-molding/

Ⅰ. Reasons and solutions for deformation of plastic injection parts

An injection molded part is shaped like a cavity but is a twisted version of the cavity shape.

1. Possible reasons for the problem

(1) Bending is due to excessive internal stress in the injection molded part.

(2) The mold filling speed is slow.

(3) Insufficient plastic in the mold cavity.

(4) The plastic temperature is too low or inconsistent.

(5) The plastic injection parts are too hot when ejected.

(6) Insufficient cooling or inconsistent temperature of moving and fixed molds.

(7) The structure of the plastic injection parts is unreasonable (for example, the reinforcing ribs are concentrated on one side, but far apart).

2. Remedy

(1) Reduce the injection pressure.

(2) Reduce the forward time of the screw.

(3) Increase cycle time (especially cooling time). Immerse in warm water (38°C) immediately after ejection from the mold (especially thicker plastic injection parts) to slowly cool the plastic injection parts.

(4) Increase the injection speed.

(5) Increase the plastic temperature.

(6) Use cooling equipment.

(7) Appropriately increase the cooling time or improve the cooling conditions to ensure that the mold temperatures of the movable and fixed molds are consistent as much as possible.

(8) Improve the structure of plastic parts according to the actual situation where permitted.

Ⅱ. Common problems that should be paid attention to in the injection molding process of transparent plastic injection parts

Due to the high light transmittance of transparent plastics, the surface quality of plastic products must be strictly required, and there should be no defects such as streaks, pores, whitening, halo, black spots, discoloration, and poor gloss. Equipment, molds, and even product design, must pay great attention and put forward strict or even special requirements.

Secondly, since most of the transparent plastics have high melting point and poor fluidity, in order to ensure the surface quality of the product, a higher temperature is often required, and the process parameters such as injection pressure and injection speed should also be finely adjusted, so that the plastic injection can be filled with the mold, It will not generate internal stress and cause product deformation and cracking.

Therefore, strict operation should be carried out in terms of raw material preparation, equipment and mold requirements, injection molding process and raw material processing of products. Here are some types of plastic material for injection molding.

Ⅲ. Common problems of color difference control of plastic molded products

Chromatic aberration is a common defect in injection molding. There are many factors affecting color difference, involving raw resin, color masterbatch, mixing of color masterbatch and raw materials, injection molding process, injection molding machine, etc.

Ⅳ. Adjust the process parameters of plastic injection parts(temperature/pressure/speed/position)

The measurement and control of temperature is very important in plastic injection moulding services. While making these measurements is relatively simple, most injection molding machines do not have sufficient temperature pick-up points or lines. On most injection molding machines, the temperature is sensed by a thermocouple. A thermocouple basically consists of two different wire tails joined together. If one end is hotter than the other, a tiny electrical signal will be generated; the more heated, the stronger the signal.

As one of injection mold suppliers china, we will do our best to meet all the needs of customers.

Do You Know the Main Process Parameters of Plastic Injection Parts?(2023年10月07日)

dgfeman — 2023-09-18T18:03:15+0900

https://www.dgfeman.com/

1. Barrel temperature of plastic injection parts:

The melt temperature is important, and the injection cylinder temperature used is only a guideline. The melt temperature can be measured at the nozzle or using the air jet method. The temperature setting of the injection cylinder depends on the melt temperature, screw speed, back pressure, injection volume and injection molding cycle. If you have no experience processing a particular grade of plastic, start with the lowest setting.

For ease of control, the shot tank is divided into zones, but not all are set to the same temperature. If operating for long periods of time or at high temperatures, set the temperature in the first zone to a lower value, this will prevent premature melting and shunting of the plastic. Make sure the hydraulic oil, hopper closure, mold and shot cylinder are at the correct temperature before starting plastic injection moulding services.

2. Melt temperature of plastic injection parts:

The melt temperature plays a major role in the flow properties of the plastic injection parts melt. Since the plastic does not have a specific melting point, the so-called melting point is a temperature range in a molten state. The structure and composition of the plastic molecular chain are different, so the impact on its fluidity is also different. Rigid molecular chains are obviously affected by temperature, such as PC, PPS, etc., while flexible molecular chains such as PA, PP, PE, etc. have no obvious fluidity by changing the temperature, so the reasonable injection temperature should be adjusted according to different materials.

3. Mold temperature of plastic injection parts:

Some plastic injection molding materials require higher mold temperature due to high crystallization temperature and slow crystallization rate. Some plastic materials require higher or lower temperature due to the control of size and deformation, or the need for demolding. For example, PC injection generally requires more than 60 degrees. In order to achieve better appearance and improve fluidity of PPS, the mold temperature sometimes needs to be above 160 degrees, so the mold temperature has an important role in improving the appearance, deformation, size, and plastic mold of the product.

4. Injection pressure of plastic molded parts:

The melt overcomes the resistance required to move forward, which directly affects the size, weight and deformation of the product. Different plastic products require different injection pressures. For materials such as PA and PP, increasing the pressure will significantly improve the fluidity. The injection pressure Size determines the density of the product, i.e. the appearance gloss. It does not have a fixed value, and the more difficult it is to fill the mold, the higher the pressure of the injection molded part.

Feman Tooling specializes in the design and manufacture of plastic and die casting molds, and can provide a full range of custom plastic molding china, including design, prototype sample making, tool making, modification and modification, accessories JIG&Fixture, 250T capacity plastic mold production and precision component manufacturing. Welcome to consult.

As an injection mold factory china, we will do our best to meet all the needs of customers.

Principles of Injection Mold Design(2023年10月06日)

dgfeman — 2023-09-18T18:02:49+0900

https://www.dgfeman.com/injection-molding-material/

Ⅰ. Mold opening direction and parting line of injection mold design

At the beginning of the design of each injection product, the mold opening direction and parting line should be determined first to ensure that the core-pulling slider mechanism is minimized and the influence of the parting line on the appearance is eliminated.

1. After the mold opening direction is determined, the reinforcing ribs, buckles, protrusions and other structures of the product are designed to be consistent with the mold opening direction as much as possible, so as to avoid core pulling and reduce seam lines and prolong the life of the mold.

2. After the mold opening direction is determined, an appropriate parting line can be selected to avoid undercuts in the mold opening direction, so as to improve the appearance and performance.

Ⅱ. The demoulding slope of the injection mold design

1. Appropriate demoulding slope can avoid product pulling (pulling). The demoulding slope of the smooth surface should be greater than or equal to 0.5 degrees, the surface of the fine skin (sand surface) should be greater than 1 degree, and the surface of the coarse skin should be greater than 1.5 degrees.

2. Appropriate demoulding slope can avoid product top damage, such as top white, top deformation, and top rupture.

3. When designing a product with a deep cavity structure, the slope of the outer surface should be larger than the slope of the inner surface as much as possible to ensure that the mold core is not offset during injection molding, obtain a uniform product wall thickness, and ensure the material strength of the product opening.

Ⅲ. Product wall thickness of injection mold design

1. All molding plastic types have a certain range of wall thickness, generally 0.5~4mm. When the wall thickness exceeds 4mm, it will cause the cooling time to be too long and cause shrinkage and other problems. Consider changing the product structure.

2. Uneven wall thickness will cause surface shrinkage.

3. Uneven wall thickness will cause pores and weld lines.

Ⅳ. Reinforcing ribs for injection mold design

1. Reasonable application of reinforcing ribs can increase product rigidity and reduce deformation.

2. The thickness of the reinforcing ribs must be ≤ (0.5~0.7) T product wall thickness, otherwise the surface will shrink.

3. The single-sided slope of the reinforcing rib should be greater than 1.5° to avoid top injury.

Ⅴ. Fillet of injection mold design

1. Too small rounded corners may cause stress concentration in the product such as insert molding electronics, resulting in product cracking.

2. Too small fillet may cause stress concentration in the mold cavity, resulting in cavity cracking.

3. Setting a reasonable rounded corner can also improve the processing technology of the mold. For example, the cavity can be directly milled with an R cutter to avoid low-efficiency electrical machining.

4. Different rounded corners may cause the movement of the parting line, and different rounded corners or inclinations should be selected according to the actual situation.

Ⅵ. The injection mold design hole

1. The shape of the hole should be as simple as possible, generally round.

2. The axial direction of the hole is the same as that of the mold opening, which can avoid core pulling.

3. When the aspect ratio of the hole is greater than 2, the drafting slope should be set. At this time, the diameter of the hole should be calculated according to the minor diameter size (maximum solid size).

4. The length-diameter ratio of blind holes is generally not more than 4. Anti-hole pin punching and bending.

5. The distance between the hole and the edge of the product is generally greater than the aperture size.

As a plastic die maker in china, we will do our best to meet all the needs of customers.

If you want to know more kinds of injection moulding products, please visit our website.

Several Parameters That Should Be Paid Attention to in the Injection Mold Design(2023年10月05日)

dgfeman — 2023-09-18T18:02:09+0900

https://www.dgfeman.com/electronics-injection-molding.html

There are two templates on the injection molding machine, one does not move, called fixed template; the other can move, called moving template. The mold is fixed on the two templates by screws and pressure plates respectively. When the mold is opened, the movable platen of the injection molding machine moves, thereby driving the mold to open.

After the mold is manufactured, injection molding is carried out, the injection molding machine is loaded, and the product is started. However, there are many models of injection molding machines, and each injection molding machine has its own parameters. For plastic die maker in china, the injection mold design must be able to meet the requirements of the injection molding machine model provided by the customer, otherwise it will not be able to produce.

There are many design parameters of the injection molding machine. The following focuses on several parameters related to the mold.

1. Injection volume of injection mold design

The injection volume is the maximum mass value (or volume value) of the melt that the injection molding machine can inject at one time during production, which represents the maximum injection capacity of this type of injection molding machine. The amount of melt used in the design of an injection mold is smaller than the injection volume of the injection molding machine. Otherwise, the product like insert molding electronics is dissatisfied and cannot be produced.

2. Clamping force of injection mold design

What is at stake is the pressing force of the injection molding machine on the template when the mold is closed. The clamping force required by the molded product during molding must be less than the rated clamping force of the selected injection molding machine. Otherwise, the melted glue will easily run away from the parting surface, resulting in flash.

3. Tie rod spacing for injection mold design

There are four tie rods in the dead corners of the fixed platen and the movable platen of the injection molding machine. Their function is to ensure that the injection molding machine has sufficient strength and rigidity, and at the same time is responsible for sliding the template. But it tends to limit the overall size of the mold, because the mold is installed from the middle of the tie rod.

The dimensions of the mold cannot be larger than their corresponding tie rod spacing at the same time. If the length of the mold exceeds the tie rod spacing, check whether the mold is hoisted into the tie rod workshop by rotating. If the rotating hoisting cannot be carried out, only the mold size can be changed. , or replace the injection molding machine.

4. Nozzle size check for injection mold design

The nozzle head of the cheap injection molding machine is generally spherical. When selecting the sprue sleeve, the spherical radius of the sprue sleeve should be consistent with the spherical radius of the nozzle. In order to prevent the high-pressure melt from overflowing from the contact gap between the nozzle and the sprue sleeve, generally the ball radius of the sprue sleeve should be larger than the nozzle ball radius, and the size of the small end of the sprue should also be slightly larger than the size of the nozzle hole, so that the nozzle can be Sprue sleeves are easy to align.

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

Processing Guidelines for Injection Mold Design(2023年10月04日)

dgfeman — 2023-09-18T18:01:43+0900

https://www.dgfeman.com/

Ⅰ. Construction materials for injection mold design

The appropriate die steel should be selected according to the application requirements. If prototyping, there is no need to use hardened die steel. In most cases, pre-hardened steel or aluminum is often used to reduce costs and facilitate tooling adjustments during the prototyping stage. These soft metals can also mold enough test pieces and prefabricated parts. Pre-hardened tool steels such as P-20 or NAKR-55 are often used to make large-scale tooling because hardening of tool steels is impractical in large-scale applications.

At higher volumes, injection mold designs of plastic die maker in china require the use of hardened mold steel for the core and cavity. S-7, H-13 and stainless steel 420 are the most commonly used steels. S-7 is an excellent die steel that can be used in production operations for long periods of time. If high melt and mold temperatures are required, H-13 steel should be used. H-13 can also be used to make hot runner manifolds. The tempering temperature of H-13 is very high and can withstand high mold processing temperatures without affecting hardness.

Stainless steels are the best choice for tool steels if the application requires high wear resistance or if there is a lot of condensation in the environment. Cavity inserts with high abrasion resistance can be made from A2, ASP23 or D-2 steel.

All tool steels can rely on some kind of plating protection to prevent wear and corrosion. Only stainless steel can be repaired by welding and machining. For steel that is already coated, repairs can only be carried out after the coating has been removed. Re-coating is required after repair.

Ⅱ. Sprue, runner and gate for injection mold design

1. Sprue bushing

With conventional molds, hot material enters the mold through a sprue bushing. The runner system guides the material through the gate into the mold cavity. Proper design and proper sizing of the sprue bushing is critical for proper melt distribution and proper ejection of the molded part.

The sprue "O" diameter should be approximately 20% larger than the nozzle exit diameter to prevent sprue blockage when the mold is opened. The "O" dimension is also closely related to part and runner size. Heated sprue bushings can be used in place of conventional sprue bushings. The initial cost of a heated sprue (or "hot" bushing) may be higher than a "cold" bushing, but because it eliminates the sprue attached to each component or runner system, it greatly reduces the waste. With thermal bushings, the temperature of the melt entering the runner system can be controlled more precisely.

2. Runner design

The runners should be as short as possible to reduce unnecessary pressure drops. The cross section is preferably circular. If the runner needs to be placed halfway through the mold, use a trapezoidal round bottom runner. Semicircular and flat runners are inefficient and not recommended. The runner should allow balanced, unrestricted flow of material into one or more parts (if multiple cavities are used).

Typically, a runner needs to be reduced in diameter by 20% for every 90 degrees of rotation. This needs to be taken into account when designing the runner system in the injection mold. The diameter of the circular flow channel is usually 0.125~0.375 (3.2~9.5mm).

3. Gate

Injection molding mold design gates for LNP composite parts should provide ample processing leeway without in-mold stress. Depending on the type of gate used (i.e., latent, edge, lug, etc.), some basic gate dimensions also control the fill rate, the amount of material flowing into the cavity, and the rate at which the part solidifies. The wall thickness determines the size of the gate, and the part geometry determines the location of the gate on the part.

As a 2k molding factory, we will do our best to meet all the needs of customers.

Common Quality Problems of Plastic Injection Parts(2023年10月03日)

dgfeman — 2023-09-18T18:01:13+0900

https://www.dgfeman.com/plastic-injection-molding/

After injection molding, there are some bad problems, which will affect the assembly efficiency or the performance of the whole machine. There are certain differences with the predetermined quality standards (inspection standards), which cannot meet the company's quality requirements. In addition to strengthening the quality awareness training of employees and dealing with defective parts in a timely manner (such as selection, processing, etc.); these defects may be caused by the following aspects: molds, raw materials, process parameters, equipment, environment, and personnel. The defects are summarized as follows:

1. Color difference of plastic injection parts

The color of the injection molded part is different from the single standard color sample when viewed with the naked eye, and it is judged as a color difference under the standard light source.

2. The plastic injection parts are not satisfied (lack of glue)

Usually lack of glue refers to the uneven flow of glue, that is, the cavity is not full. The plastic moulding parts are not full, and there are bubbles, voids, shrinkage holes, etc., which do not match the standard model, which can also be called lack of glue.

3. Warpage and deformation of plastic injection parts

The shape of the injection molded part is rotated and twisted after the plastic part is demolded or for a period of time. If the straight edge is facing inward, or the flat part is curved outward, or the flat part has undulations, there are local and overall deformation.

4. Welding line (pattern) of plastic injection parts

The linear traces on the surface of the plastic injection parts are formed by the fusion of plastics in the mold, and the melts are not completely fused together at the intersection. Deep to shallow development, this phenomenon has a certain impact on the appearance and mechanical properties. Such as the weld line at the bottom of the hook plate.

5. Corrugation of plastic injection parts

The surface of the plastic injection parts has a spiral or cloudy wave-like uneven phenomenon, or there are corrugated lines on the inside of the transparent products, which are called corrugations.

6. Overfill of plastic injection parts (flash, drape)

A thin (flash) compound appears around the parting line around the injection molded part or on the sealing surface of the mold, which is called overflow.

7. Silver thread pattern of plastic injection parts

The long, needle-like silver-white frost-like fine lines on the surface of the plastic injection parts, the opening direction is along the direction of the material flow, and the front end of the fluid is rough where the plastic parts are not completely filled, called silver lines (silver lines) .

8. Uneven color of plastic injection parts (color mixing)

The color of the surface of the plastic injection parts is not uniform, there are shades and different hues, which is called color mixing.

9. Poor gloss of plastic injection parts (dark color)

The surface of the injection molded part is dull and dull or the gloss is uneven, which is called dark color or poor gloss.

10. Poor demoulding (deformation from demoulding)

Similar to warpage deformation, the plastic injection parts cannot be released from the mold smoothly after molding, and there are deformations, white tops, cracks, strains, etc., which are called poor demoulding.

11. Cracks and ruptures of plastic injection parts

Void cracks and resulting breakage appear on the surface of the injection molded part.

12. Foaming (burning) of plastic injection parts

Many dark black streaks or black spots appear on the surface or inside of the plastic injection parts, which are called smears or burns.

13. The size of the plastic injection parts does not match

During the molding process of plastic injection parts, the failure to maintain the original predetermined dimensional accuracy is called dimensional non-conformity.

14. Bubble and dark bubble in plastic injection parts

There are pores inside the plastic injection parts. Bubble is the defect of small volume or a series of pores formed inside the product after molding, and dark bubble is the vacuum hole generated inside the plastic.

15. Mixed corrosion on the surface of plastic injection parts

The surface of the plastic injection parts presents a dull, whitish and hazy appearance, which is called mixed corrosion.

16. Depression of plastic injection parts

The surface of the plastic injection parts is uneven, smooth, and shallow pits or dimples are generated inward.

17. Cold material for plastic injection parts (cold glue)

The surface of the injection molded part is formed of cold glue, and the color, performance and body are all different plastics.

18. Top white/top height of plastic injection parts

The surface of the plastic injection parts is obviously white or higher than the original plane.

19. White spot of plastic injection parts

There are white particles in the plastic injection molding products, and the particles are also called "fish eyes", which are mostly reflected on the transparent products.

20. Insufficient strength of plastic injection parts (brittle cracking)

The strength of the injection molded part is lower than expected, so that the injection molded part cannot withstand the predetermined load.

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

PP Injection Molding(2023年10月02日)

dgfeman — 2023-09-18T18:00:47+0900

https://www.dgfeman.com/pp-injection-molding/

① Factors in raw materials: including toner replacement, plastic material grade change, and setting agent replacement.

② Different types of raw materials: For example, injection molding polypropylene and ABS material or injection molding polycarbonate require the same color, but there is a slight color difference due to different material types, but a limited range is allowed.

③ Equipment process reasons:

A. temperature;

B. Pressure;

C melting time;

D. Different batches of mixing materials, different machines and other process factors.

④ Environmental factors: the barrel is not clean, the drying hopper is dusty, the mold is oily, etc.

⑤ Factors of the toner itself: some toners are not affected by temperature, and the products are easily changed by temperature changes.

2. Injection molding parts are not satisfied (lack of glue)

Generally, the parts that appear are: deep, thin, long, thin, far from the gate, easy to trap air and lack of glue in places with debris in the mold.

① Mould:

A. The design of the gating system is unreasonable. The gating system is the channel for the melt to enter the mold cavity, which has a great relationship with the molding quality of the injection molded parts. The gate is not parallel, and the position of the gate is not in the wall thickness;

B. The mold exhaust structure is poor;

C. Impurities or cold materials in the melt block the flow channel;

D. The mold temperature does not meet the requirements.

② In terms of raw materials:

A. The moisture content of raw materials is too large;

B. The volatile matter in the raw material exceeds the standard;

C. There are too many impurities or recycled materials in the raw materials.

③ Injection molding machine:

A. Insufficient injection volume: For example, a 150T machine is used to produce 180T products.

B. The nozzle is blocked by foreign matter, and the nozzle hole is too small;

C. Insufficient supply of raw materials: if the barrel is blocked, the nozzle material will affect the blanking;

D. Check valve failure;

E. The injection stroke is not enough;

F. The sealing ring of the injection cylinder is damaged.

④ Forming operation:

A. The mold temperature is too low;

B. The injection pressure is too low;

C. The pressure holding time is too short;

D. The injection speed is too slow or too fast;

E. The melt temperature is too low.

3. Warpage and deformation of injection molded parts

① Mould:

Mainly due to unreasonable reasons in mold design.

② Forming operation:

A. The injection pressure is too high, the molecular orientation of the fluid direction and the vertical flow direction are quite different, and the plastic tries to restore the original curled state, so the shrinkage in the fluid flow direction is greater than that in the vertical flow direction;

B. The melt temperature is too high;

C. The holding pressure is too high: when the holding pressure is high, the internal pressure in the plastic is too high, and the release of the internal stress after demolding causes the injection molded parts to warp and deform;

D. The melt flow rate is too slow;

E. The tempering temperature is too high or the time is too long.

③ In terms of raw materials: PP/PA materials are easily deformed.

4. Welding line (pattern) of injection molded parts

① Mould:

A. There are too many gates, that is, there are too many glue feeding points, and the cross-sectional area of the glue feeding mouth is too small;

B. There is no cold material hole in the mold or the position of the cold material hole is incorrect;

C. The design of the mold cooling system is unreasonable, and the melt is cooled too fast and unevenly in the mold.

② In terms of raw materials:

A. Too much release agent is used, or unsuitable release agent is used;

B. The fluidity of the melt is poor, and it is easy to produce weld lines during molding;

C. There is too much water in the raw material or the volatile content is too high.

③ Forming operation:

A. The melt temperature is too low, the low temperature melt has poor shunting and confluence performance, and it is easy to form weld lines;

B. The melt injection pressure is too low, so that the injection speed is too slow, and the temperature of the melt in the cavity is not the same. At this time, the melt is easy to produce weld lines when the melt is divided and merged.

As a reliable plastic molding company china, we can offer sorts of injection molded parts for sale, anything you need, please leave us a message.

Precautions for Maintenance of Injection Moulding Dies(2023年10月01日)

dgfeman — 2023-09-18T18:00:18+0900

https://www.dgfeman.com/2k-2shot-injection-molding.html

The maintenance procedures required for each precision plastic injection moulding location depend on different mold cycles. Below are some general principles that every mold user can use to ensure the efficient operation of injection mold components such as hot runners, heaters, guide posts, and ejectors, in case the unexpected arises.

1. Check whether there is early-warning rust or moisture at the air diffuser of the injection moulding die

If you notice rust or moisture near the hot runner vents, it could mean condensation inside or possibly a ruptured water pipe. Moisture can cause a fatal short circuit to the heater. If the machine is not running all year round, but is shut down at night or on weekends, the chance of this condensation will increase.

2. Remember to remind the precision plastic injection moulding die operator not to "clean up" the hot nozzle at the gate

If the operator happens to see a small piece of stainless steel at the die runner, it may actually be a runner assembly. "Cleaning" out what appears to be a hindrance often destroys the hot tip. In order not to damage the hot nozzle, please confirm the nozzle type of the lower hot runner system before taking action, make sure that all operators are well trained and can recognize all the different nozzle types they come into contact with.

3. Sliding buckle of injection molding die

For machines that run year-round, this work should be done weekly.

4. The resistance value of the heater is checked interactively by the injection moulding die

You should have measured the resistance of your heater when you first started using it, now it's time to measure it again and compare. If the resistance value fluctuates by 10%, it is time to consider replacing the heater to ensure that it does not fail at a critical point in the production process. If the initial resistance value has never been measured, measure it now and use the resulting value as a reference for future inspections of the heater.

5. Check whether there are signs of wear between the guide post and the guide sleeve of the injection moulding die

Look for signs of scratches or scuffs, which are due to lack of lubrication. If the marks are just emerging, you can also extend the life of the guide posts and guide bushes by lubricating them more. If the wear is severe, it is time to replace the parts with new ones. Otherwise, the cavity and core parts may not fit well, resulting in different thicknesses of the part cavity walls.

6. Check the water flow during the production of the 2 shot plastic injection molding die

Connect a hose to the outlet of the waterway and let the water flow through the hose to the bucket. If the water flowing out is not clear or colored, rust may occur, and if the water is not flowing smoothly, it means that there is a blockage somewhere.

If these problems are found, re-drill all the water pipes to make sure they are clear (or clean them by whatever method you use most often). Improving the plant's water treatment system can prevent future problems caused by rust and blockages.

7. Clean the injection moulding die thimble

Over the course of a year, the thimble will become dirty due to gas build-up and film-like impurities. A good cleaning with mold cleaner every six to twelve months is recommended. After cleaning, apply a layer of lubricant to the thimble to prevent chafing or breaking.

8. Check whether there is a fracture in the radius area of the hot filling nozzle of the injection moulding die

Fractures are caused by loose hardened plastic fragments remaining in the hot nozzle of the machine from the clamping force from the injection barrel assembly during forward injection. It is also possible that the problem is caused by misalignment of the centerlines. Both possibilities are to be considered when finding fractures.

Sprue bushings should be replaced if the damage is severe enough to prevent petal-like leaks in the injection moulding die (referring to plastic leaks between the guide bush and the hot tip of the machine).

As one of 2k molding suppliers, we can offer sorts of related products for sale, anything you need, please contact us.

Electronic Plastic Injection Molding(2023年)

dgfeman — 2023-06-15T14:51:29+0900

https://www.dgfeman.com/electronics-injection-molding.html

Feman is specialized in electronics injection molding products plastic mold building. We got full experience in making industrial light, covering housing, bottom case, electrical connectors, fire-resistance electronic plastic components, etc.

With a professional and well-trained team of engineers and supporting staff, we specialize in making different kinds of electronic plastic parts injection mould for sale, which are exported to the globe, including two-shot molding/ 2k moulding, over mold, multi-cavity mold, unscrew mold design, gas assist mold, insert molding.

As a reliable electronics plastic manufacturer, we can offer sorts of molding plastic over electronics for sale, if you have needs, please contact us.

Feman tooling injection molding mold factory china is skilled in building various plastic injection parts. For years in the custom plastic injection molding china industry, with accumulated knowledge and experience. We have built up our own product library to better serve and contribute to our customers. Our faith is always to grow together.

Causes of Weld Marks of Plastic Products in Injection Molding(2023年)

dgfeman — 2023-06-15T14:51:05+0900

https://www.dgfeman.com/causes-of-weld-marks-of-plastic-products-in-injection-molding.html

Weld lines plastic injection molding die makers own many new injection technology, but weld marks still occur during injection molding.

The weld lines in plastic injection molding products are caused by the incomplete fusion of the fused resins from different directions during the injection process. The two streams of resins at the fusion point do not mix with each other. The lower the temperature, the more obvious the melt marks are and the lower the strength is. Conversely, the higher the temperature, the stronger the bonding force. The bonding of the fusion joint also depends on the pressure applied there. The lower the holding pressure is, the worse the fusion and the lower the strength will be. The weld mark is the confluence point of the resins or the end of the resin flow. If a vent is not well set in the weld line of plastic products to exhaust gas, the appearance and strength of fusion will be damaged.

Solutions:

1. Increase resin temperature, injection molding mold temperature, injection pressure and speed.

2. Highlight air exhaust of parting surface. Adding inserts and ejector pins to weld lines is also conducive to air exhaust.

3. Choose a reasonable position for glue feeding, and it is best to do the flow analysis before the moulding of plastic products.

4. Increase the spills, and cut it off after cooling and forming.

5. Thicken and shorten the runner gating system to improve injection molding.

6. Rough texture is a good option for wool products, which is also beneficial to improve the weld mark problem.

The technology is developing and the technology is improving. There is no need to list all of them. Advanced technology is waiting for the injection moulding die makers
to study!

As a china 2k injection molding manufacturer, we will do our best to meet all the needs of customers.

More kinds of plastic molded products, please visit our website.

Cause Analysis on Warpage of Injection Molded Products(2023年)

dgfeman — 2023-06-15T14:50:37+0900

https://www.dgfeman.com/cause-analysis-on-warpage-of-injection-molded-products.html

Deformation, bending and twisting in plastic injection occur mainly because that the shrinkage rate in flow direction is larger than that in vertical direction during plastic forming. And injection molding warpage is also inevitably caused by large internal stress remaining in the parts during plastic injection. These are all deformations caused by high stress. Fundamentally, the die design determines whether the product will warp or not. It is quite difficult to prevent warpage by changing the forming conditions. The final solution to the problem must start with the mold design and improvement. The warpage is mainly caused by the following reasons:

1. Mold

(1) The thickness and quality of the parts should be uniform.

(2) The well-designed cooling system shall uniform the temperature of all parts of the mold cavity, and the pouring system shall make the material flow symmetrical so as to avoid warping caused by different flow direction and unequal shrinkage. The main passages and branches which are difficult to form shall be appropriately thickened. The density difference, pressure difference and temperature difference in the mold cavity need to be eliminated as far as possible.

(3) The transition zone and corners of the parts should be smooth enough and have good demould properties, such as higher demould redundancy, improved die surface polishing and balanced ejection system.

(4) The exhaust system should be agreeable.

(5) The wall thickness or warpage resistance directions of the part should be increased, and the warpage resistance of the part can enhanced by stiffener.

(6) The strength of material used for the die is not enough.

2. Plastic

Crystalline plastics are more likely to warp than amorphous plastics. And crystalline plastics can correct warpage deformation by utilizing a crystallization process in which crystallinity and shrinkage decreases with increasing cooling rate.

3. Processing

(1) If the plastic injection pressure is too high, the pressure is maintained for too long, or the temperature is too low or too fast, it will lead to the increase of inner stress and warpage will occur.

(2) Mold temperature is too high and cooling time is too short, which makes the parts overheated during demoulding, causes ejection deformation.

(3)Lowering screw speed and reducing density through controlling back pressure to decrease internal stress while maintaining minimum charge.

If you want to know more kinds of injection mold china, please visit our website.

Automotive Plastic Injection Molding(2023年)

dgfeman — 2023-06-15T14:50:08+0900

https://www.dgfeman.com/automotive-plastic-injection-molding.html

Feman automotive mould is the automotive mould projects and technical development & manufacturing foundation of Feman factory in custom plastic molding china. Feman Automotive strengths in medium and small sized precision and complicated plastic injection mold design and injection manufacture for auto parts mould, main products: door panel, automotive lighting, air conditioning, A/B/C pillars, water tank, instrument panel, glove box assembly, plastic intake manifold, interior trim, grille, air inlet components, gas cap etc. We especially take pride in lighting parts making with high precision CNC engraving and milling machines. The max lighting system mold we made is 1100*1000, 2k plastic injection moulding with transparency and red color.

Advantages of Injection Molding for Automotive Applications
Injection molding offers numerous advantages for automotive applications. Feman automotive moulding company specializes in producing automotive molds. The advantages include high production efficiency, allowing for large-scale manufacturing of complex automotive components with consistent quality. It enables precise design flexibility, allowing for intricate geometries and integrated features. Injection molding also provides excellent material properties, such as durability, impact resistance, and chemical resistance, making it suitable for automotive requirements. It offers cost-effectiveness by reducing labor and assembly costs, minimizing waste, and optimizing cycle times. Furthermore, injection molding supports mass production, ensuring consistent part-to-part quality and facilitating quick turnaround times for automotive manufacturers. Overall, plastic injection molding china, with Feman's expertise in automotive molds, is a valuable manufacturing process for producing high-quality auto parts.

Injection Molding Materials for Automotive Mould
There are several cheap injection molding materials commonly used for automotive molds due to their specific properties and suitability for automotive applications. Some of these materials, along with their advantages and disadvantages, are as follows:

ABS (Acrylonitrile Butadiene Styrene):

Advantages: Good impact resistance, cost-effective, easy to process, versatile.

Disadvantages: Moderate heat resistance, lower dimensional stability compared to some other materials.

PC (Polycarbonate):

Advantages: High impact strength, excellent transparency, good heat resistance, electrical insulation properties.

Disadvantages: Higher cost compared to other materials, not suitable for outdoor applications due to UV sensitivity.

PP (Polypropylene):

Advantages: Lightweight, good chemical resistance, high fatigue resistance, cost-effective.

Disadvantages: Lower impact strength compared to some other materials, moderate heat resistance.

PA (Polyamide/Nylon):

Advantages: High strength and toughness, excellent wear resistance, good chemical resistance.

Disadvantages: Hygroscopic (absorbs moisture), higher cost compared to some other materials.

POM (Polyoxymethylene):

Advantages: High stiffness, excellent dimensional stability, low friction coefficient.

Disadvantages: Limited resistance to acids and UV light, lower impact strength compared to some other materials.

These are just a few examples of injection molding materials used for automotive molds. The choice of material depends on specific application requirements, including mechanical properties, temperature resistance, chemical resistance, and cost considerations. It's crucial to select the right material that balances performance, cost, and manufacturability for automotive components.

Why do Automotive Manufacturers Choose Injection Molding
Automotive manufacturers choose injection molding as their preferred manufacturing method for several reasons, especially when it comes to custom selections of automotive injection molding products. Automotive injection molding is a versatile manufacturing process capable of producing a wide range of components for the automotive industry. Some examples of automotive parts that can be manufactured using injection molding include:

Interior Components: This includes parts such as dashboard panels, instrument clusters, door panels, center consoles, seat components, and trim pieces.

Exterior Components: Automotive injection molding can produce exterior parts like bumpers, fenders, grilles, side mirrors, door handles, and body panels.

Lighting Components: Injection molding is used to manufacture headlights, taillights, turn signals, fog lights, and other lighting elements.

Engine Components: Parts like intake manifolds, valve covers, oil pans, and engine mounts can be produced using injection molding.

Electrical Components: Automotive injection molding is used to manufacture connectors, switches, wiring harnesses, fuse boxes, and sensor housings.

HVAC Components: Injection molding can produce components for heating, ventilation, and air conditioning systems, such as air vents, control knobs, and fan housings.

Safety Components: This includes parts like airbag housings, seat belt components, and structural reinforcements.

These are just a few examples of the many automotive components that can be manufactured using injection molding. The process offers design flexibility, cost-effectiveness, and high production efficiency, making it a preferred choice for producing a wide range of automotive parts.

Automotive Plastic Injection Molding(2023年)

dgfeman — 2023-06-15T14:49:51+0900