Rubber Injection Molding

Injection Molding From Prototyping to Production

Rubber Injection Mold and Tooling Services

As rubber injection molding companies, Zhongde makes all the rubber injection mold in-house, from mold design to mold production and mold maintenance. We not only increased the accuracy of custom rubber injection molded parts, and met the customized requirements of complex-shaped parts, but also improved production efficiency.

Item Details
Injection Mold Service Prototype tooling & production tooling
Injection Mold Material Steel P20, H13, S136, 2316, 2344, 083, 718H, SKD618, etc.
Injection Mold Type Family molds, Single cavity molds, multi-cavity molds, two plate molds and three plate molds.
Mold Storage Stored for 5 years in inactivity
Mold Life 3 million to 5 million shots for production tooling
Mold Guarantee Free mold if the last one worn out
Mold Remachining We can re-machine the molds if there are any changes required, basis on mold structure.

Rubber Injection Molding Size Chart

The below table shows the regular size of the custom injection molding rubber parts we make. If you need a larger size injection molding rubber or have unique requirements, contact us for help.

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

Rubber Injection Molding Materials

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

The general materials are listed below for custom rubber injection molding.

  • Silicone
  • EPDM
  • NBR
  • CR
  • FKM
  • TPU
  • TPE
  • TPV

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
  • Colorants
  • Plasticizers
  • Vulcanizing ageent
  • Tackifiers

Rubber Injection Molding Surface Finishing

Proper surface finishing will improve the injection molded parts' quality. Zhongde offers a wide range of surface treatment options. These efficient surface finishes improve the part's functions and aesthetic appeal.

1. Filling stage
The filling is the first step in the entire rubber injection cycle. The time is calculated from the beginning of injection when the mold is closed until the mold cavity is filled to about 95%.

2. Pressure-holding stage
The role of the holding pressure stage is to apply continuous pressure to compact the melt and increase the density of the rubber, thus compensating for the shrinkage behavior of the rubber.

3. Cooling stage
In rubber injection mold, the design of the cooling system is very important. A well-designed cooling system can greatly shorten the molding time, improve injection molding productivity, and reduce costs.

4. Demoulding stage
Demoulding is the last step in an injection molding cycle. There are two main ways of release: ejector rod release and stripper plate release.

rubber injection molding process
Rubber Injection Molding Process Figure

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

Rubber Injection Molding Products Display

Our rubber injection molding services are pefect for addressing the various deamands for different industries, including automotive injection molded parts, marine custom molded parts, consumer electronics custom rubber parts, home appliances molded parts, etc. Following are some of our previous injection molding rubber parts.

FAQs of Rubber Injection Molding Service

View our FAQ center for more questions.
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.
Yes, our team can provide design assistance and engineering support to ensure your rubber parts meet your specifications and perform optimally.
We have stringent quality control processes, including inspections, testing, and adherence to industry standards, ensuring the highest quality of the molded rubber parts.
Depending on the stage of production, modifications may be possible. We will work with you to accommodate any necessary changes.

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