Plastic Injection Molding

Zhongde offers China precision plastic injection molding services and on-demand manufacturing. Get custom prototypes and plastic molded parts in a few days at competitive prices. Our skilled team ensures top-quality products with precision and excellent finishes.

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Zhongde Plastic Injection Molding Services

Four Stages of the Injection Molding Manufacturing Process

Plastic injection molding is a cost-effective manufacturing process for custom-molded plastic parts in small and large batch volumes.

As a reputable plastic injection molding company in China, Zhongde supplies custom molding services including China precision plastic injection moulding and rubber injection molding, as well as over-molding and insert molding. Our custom plastic injection molding services involve injection mold design and production, rapid prototyping, and on-demand manufacturing. The plastic injection molding made at the Zhongde factory is a standard process involving a stainless steel mold. Our goal is to get high-quality custom plastic injection molded parts regardless of size and complexity.

Injection Molding Molds Making and Tooling Services

Zhongde is an on-demand manufacturer from mold designing and rapid prototyping to mass production. We offer custom mold-making, prototype tooling, and production tooling services. Our experienced team utilizes advanced CAD/CAM software and state-of-the-art equipment to injection mold design, mold making, and maintain molds with exceptional precision and durability for high-quality custom molded parts. Check our injection molding capabilities and tooling services below.

Item Details
Injection Molding Service Options Prototyping & on-demand manufacturing
Insert Molding Inserts are placed into the mold and molding occurs around them. This allows for inserts such as helicoids to be molded in your design.
Overmolding Premade parts are placed into the mold to mold over them. This allows for multi-material injection molding.
Mold Material Steel P20, H13, S136, 2316, 2344, 083, 718H, SKD618, etc.
Production Tooling Traditional molds, used for mass production.
Mold Type Family molds, Single cavity molds, multi-cavity molds, two plate molds and three plate molds.
Mold Storage Stored for 3 years in inactivity
Guaranteed Mold Life Unlimited
Mold Remachining We can re-machine the molds if there are any changes required, basis on mold structure.

Plastic Injection Molding Size Chart

The below table shows the regular size of the custom plastic injection molding parts. If you need a larger size or other unique requirements about the size, Zhongde as a professional China precision plastic injection molding manufacturer, can also help you achieve it at a competitive price.

Size Metric Inch
Length 2500 98.4
Width 2000 78.7
Height 1500 59

Plastic Injection Molding Materials

At Zhongde, we not only offer a wide range of injection molding materials but also provide additives to meet special requirements. Our professional material expert can customize the most cost-effective materials to meet your specific needs. There is our injection molding materials and additives list for your reference.

The general materials are listed below for custom plastic injection molding.
  • ABS
  • HDPE
  • PA
  • PTFE
  • PP
  • PC
  • PE
  • PS
  • PA6
  • POM
  • PMMA
  • LDPE
  • PVC
  • PU
If the standard materials can’t meet your custom injection molding parts requirements, the additives and fibers can improve the material properties.
  • UV absorbers
  • Flame retardants
  • Plasticizers
  • Colorants
  • Carbon fibers
  • Glass fibers

Injection Molding Surface Finishing

Injection molding surface finish is critical to a successful part design and it is used for aesthetic and functional reasons in injection molded parts for engineering products. The surface finish improves the look and the feel of a product as the perceived value and quality of the product increase with a suitable surface finish.

surface finish Glossy


A-grade finish is smooth and highly reflective, giving the product a shiny appearance. It’s often used for products where aesthetics are important.

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surface finish Semi-glossy


The B-grade finish is less reflective than glossy but still has a smooth and somewhat shiny appearance.

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surface finish Matte


C-grade finish is non-reflective and has a dull appearance. It’s often chosen for parts where glare or light reflection is undesirable.

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surface finish Textured


D-grade finishes are intentionally rough or patterned. They can provide a better grip or a unique appearance to the product.

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The Plastic Injection Molding Process

Plastic injection molding is the process of filling a mould or mold tool with molten plastic under setting pressure. The tool may comprise a single cavity, multiple cavities, or family cavities in order to make indefinite numbers of parts. Assuming that the mold has been prepared. The injection molding process consists of the following basic steps:

1. Clamping
The first step of the injection molding process is clamping. Injection molds are typically made in two pieces. In the clamping phase, the two metal plates of the mold are pushed up against each other in a machine press.

2. Injection
When the two plates of the mold were clamped together, the molten plastic was injected into the mold.

3. Cooling
Put the mold alone, cool and solidify the plastic into the end-use product that can be safely removed from the mold.

4. Ejection
Open the mold, an ejector bar slowly pushes the solidified product out of the open mold cavity.


Why Choose Zhongde for Plastic Injection Molding

There are many plastic injection molding companies in China, so why choose Zhongde as your plastic injection molding company? Moving beyond rapid prototyping, Zhongde, as a reliable Chinese plastic injection molding manufacturer, Leading the way in offering high-quality plastic injection moulding services and efficient production. Zhongde factory works 24 hours with three shifts per day which allows us to complete projects very quickly. With a closed-loop production system and mature technology, the price of custom-made plastic molds made by Zhongde, and low-cost plastic injection molding is more competitive than other global plastic injection molding suppliers and companies as well as other Chinese plastic molding manufacturers.

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Our sales team will contact you within 24 hours. We are glad to answer your questions.

Applications of Injection Molded Plastic Parts

Our plastic injection molding service is perfect for addressing the various demands of different industries, including agricultural machinery, automotiveconsumer electronicshome appliances, fitness equipment, transmission system, etc. The China injection plastic injection molded parts included ABS electronics enclosure, plastic bushing, plastic end cap, plastic gear, plastic plug, plastic ball, etc.

FAQs of Plastic Injection Molding Service

View our FAQ center for more questions.

Yes, our expert team can offer design assistance, ensuring your part is optimized for manufacturability and cost-effectiveness.

Yes, we provide regular updates on the production progress, keeping you informed about the status of your order.


Depending on the stage of production, modifications may be possible. We will work with you to accommodate any necessary changes.

We prioritize the protection of your intellectual property and maintain strict confidentiality. We are open to signing non-disclosure agreements (NDAs) to safeguard your designs and project information.

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