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Intro to injection molding
High precision plastic injection molding is the most common manufacturing process for the fabrication of large quantities of plastic parts. As an ideal method to producing high volumes plastic parts in the same shape, practical injection molding can be used to create various of plastic parts, which vary greatly in size, complexity and application. Almost every plastic item around you was manufactured by injection molding.

As a reputable custom plastic injection moulding company in China, Zhongde supplies high precision plastic and rubber injection molding, as well as overmolding and insert molding, all with affordable price and considerate service. The plastic injection molding making at Zhongde factory is a standard process involving a stainless steel mold.

The whole molding and tooling can be divided into six stages: mold clamping, injection molding, pressure holding, cooling, mold opening, and product removal. At a certain temperature, the completely melted plastic material is stirred by a screw, injected into the mold cavity with high pressure, then cooled and solidified into the final plastic molded parts. When it comes to the type of plastic moulding, custom made plastic molds manufactured by Zhongde, a professional plastic and rubber injection molding company, are for the satisfaction of every customer, with low price and reduced cost.

Besides pp, pu and pvc, as an injection molding company, Zhongde also provides silicone and polyethylene plastic injection moulding businesses as well. More customized plastic molds are for sale and available at present, such as aluminum plastic injection molds. And the especially popular plastic injection molding: thermoplastic injection molding, short run injection molding, hot/cold injection molding, low volume injection molding...

Guideline of Custom Precision Plastic Injection Molding Service
Size of Precision Custom OEM Plastic Injection Moulding

Below table shows the size of Plastic Injection Molding parts we usually make. If you need a larger size, Zhongde, a reliable prototype and plastic injection die mould manufacturer, can also help you achieve it with low cost.

SizeMetricInch
Length250098.4
Width200078.7
Height150059

Available Material of China Plastic Injection Molding Businesses For Sale

In addition to the general materials listed below for plastic injection molding and for overmolding insert molding, Zhongde can also modify the materials according to the special needs of customers. Our professional engineers will adjust the raw material formula to meet the unique conditions of use.

ABS | Acrylonitrile Butadiene Styrene

PA 6 | Polyamide 6, Nylon 6

PA 6/6 | Polyamide 6/6, Nylon 6/6

POM | Acetal Polyoxymethylene, Delrin

PP | Polypropylene

PE | Polyethylene

LDPE | Low-Density Polyethylene

HDPE | High-Density Polyethylene

UHMWPE |Ultrahigh Molecular Weight Polyethylene

PTFE | Polytetrafluoroethylene

PEEK | Polyether Ether Ketone

PC | Polycarbonate

PMMA | Polymethyl Methacrylate, Acrylic

PS | Polystyrene

PVC | Polyvinyl Chloride (Shore D)

PU | Polyurethane

Additives of Manufacturing Practical Plastic Custom Injection Molding

NameDescription
UV absorbersAbsorb UV radiation, slowing down the degradation of the material when used outdoors.
Flame retardantsPrevent ignition and inhibits spread of fire.
PlasticizersIncrease flexibility and promotes plasticity, reducing brittleness of the material.
ColorantsUsed to color plastics.
Carbon fibersIncrease strength, toughness, and rigidity of the material at the expense of making the material more brittle.
Glass fibersIncrease strength, toughness, and rigidity of the material at the expense of making the material more brittle. It is more flexible than carbon fibers.

Surface Finishing of Cheap/Low-Cost Plastic Injection Molding Services

NameDescription
GlossyThe mold is smoothed and then polished with a diamond buff, resulting in parts with a mirror-like finish.
Semi-glossThe mold is smoothed with fine-grit sandpaper, resulting in parts with a fine surface finish.
MatteThe mold is smoothed using fine stone powder, removing all machining marks.
Textured finishThe mold is first smoothed with fine stone powder and then sandblasted, resulting in a textured surface.
As-machined finishThe mold is finished at the machinist's discretion. Tool marks may be visible.