Custom Injection Molding Services

We enjoy challenges that come with bringing custom injection molding parts to reality. Upload your drawing and request an injection molding quote today!


Get a quote for tooling and the first batch production.


DFM report will be provided for production confirmation if needed.


You get free samples per part for your approval.


Your parts go into production after samples are approved.

Quality Control

We use the sample to verify future orders and provide QC checks.


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Zhongde Injection Molding Process

Plastic Injection Molding

China precision plastic injection molding is the most common manufacturing process for the fabrication of large quantities of plastic parts. China custom plastic injection molding can create various customized plastic parts.

Rubber Injection Molding

Custom rubber injection molding by our company able to be used to produce both solid rubber parts and rubber bonding metal parts, which is an ideal process for mid-to-high volume rubber production.

Overmolding & Insert Molding

We can provide over-molding and insert molding to produce unique multi-material parts. Our production material range is from thermoplastic to elastomer rubber, as well as metal.

Injection Molding From Prototyping to Production

Injection Molding Molds Making and Tooling Services

Zhongde makes all the molds in-house. We have been insisting on developing our own molds for many years, meanwhile, introducing fully automated equipment. Our professional engineer will help to improve the mold design. In addition, our custom die mold is lifetime guaranteed and machined from high-grade metal. 

  • Injection Molding Service Option: Prototyping & on-demand manufacturing


  • Mold Material: Steel P20, H13, S136, 2316,2344, 083, 718H, SKD618, etc.


  • Mold Type: Family molds, single and multi-cavities 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.

Zhongde Injection Molding Capabilities

Zhongde has developed a one-stop solution from mold designing and rapid prototyping to mass production. We not only increased the accuracy of products, and meet the customized requirements of complex-shaped parts, but also improved production efficiency, making us take the lead in the reform wave of rapid production and digital manufacturing.

Zhongde Injection Molding Capabilities Chart

Name Description
Rapid tooling Mold working life time up to 20,000 runs. Short machined time.
Production tooling Traditional molds, used for mass production.
Single cavity moulds Moulds only produce one part per cycle, mostly used for low production rates.
Multi cavities moulds Moulds can produce more than one part per cycle, used to increase production rate.
Family moulds Moulds produce two or more different parts per injection cycle, the parts should be of the same material and color.
Two plate moulds Moulds consist of one parting plane which used for parts that are typically gated on or around their edge.
Three plate moulds Moulds consist of two parting planes which used for parts that can be gated anywhere along its surface.
Insert molding Inserts are placed into the mold and molding occurs around them. This is allows for inserts such as helicoils to be molded in your design.
Overmolding Premade parts are placed into the mold to mold over them. This is allows for multi-material injection molding.
our quality promise

Our Quality Promise

Zhongde is committed to providing quality products that meet or exceed the needs of our customers through continuous improvement.


Strictly follow the confirmed drawings or samples to produce. If there is any deviation, our company will replenish to our customers to make up for the loss.

Injection Molding Materials

We have wide selection of thermoplastic and thermoset materials, all serving different purpose. Be aware of the basic characteristics of the material, such as acid and alkali resistance, UV resistance, and high wear resistance, choose the suitable injection molding material based on your application requirement.

The General materials listed below for custom plastic injection molding.


The general rubber injection molding materials are listed below:



If you have special needs for injection molding parts, our professional engineers will adjust the raw materials formula to meet the unique conditions of use.

UV absorbersColorants
Flame retardantsCarbon fibers
PlasticizersGlass 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.

Different grades of surface finishing chart.

GlossyA-grade finishes are made using a diamond buffing process and yield shiny and glossy surfaces on injection molded parts.Get A Quote
Semi-glossyB-grade finishes use grit sandpaper to produce parts with a slightly rougher finish than grade A parts. Custom molded plastic parts that undergo B-grade finishing have a matte surface texture.Get A Quote
MatteC-grade finishes use grit sanding stones to produce a rough, uneven surface. Injection plastic parts that undergo C-grade finishing have a matte surface texture.Get A Quote
TexturedD-grade finishes use grit and dry glass beads or oxide to produce a very rough textured finish. Depending on the type of material used, products can have a satin or dull finish.Get A Quote

Why Choose Zhongde for Custom Injection Molding?

Moving beyond rapid prototyping, this reliable injection molding manufacturer is supported by many senior project managers and engineering experts, communicating through all project stages from design to production.

Let's Start A New Project Right Now!

FAQs of Prototype Injection Molding Manufacturing Services & Systems

Can I modify the injection mold after the first run?

We can modify your steel injection mold by additional machining, fill-in welding, welding in additional material, or inserting a replacement feature for a reasonable cost. However, if the changes are too great, producing a new mold may be more cost-effective than reworking the existing one.

Where is the tooling when my injection mold is done?

As a one-stop rubber and plastic injection molding manufacturer, we will make the tooling by ourselves. As long as you continue to run parts in our facility, we will keep the molds for you and make any necessary repairs or refurbishments at our cost for the life of your mold.

Who owns the mold?

The mold belongs to you. Zhongde is only responsible for saving the mold for you and will not use it for other customers.

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