Overmolding and Insert Molding

Injection Molding From Prototyping to Production

Tooling Service of Overmolding & Insert Molding

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.

Available Size of Overmolding & Insert Molding Service

The below table shows the regular size of the custom insert molding parts and overmolded parts. If you need a larger size or other unique requirements about the size, Zhongde as a professional China precision 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

Materials of Overmolding & Insert Molding

At Zhongde, we not only offer a wide range of 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 listed below are for custom insert and overmolded plastic injection.

  • ABS
  • HDPE
  • PA6/6
  • PTFE
  • PP
  • PC
  • PE
  • PS
  • PA6
  • POM
  • LDPE
  • PVC
  • PU

The general rubber overmolding and insert molding materials are listed below:

  • EPDM
  • PVC
  • TPU
  • Silicone
  • TPE
  • TPV

The preformed and inserts metal materials are listed as below: 

  • Aluminum
  • Carbon Steel
  • Brass
  • Stainless Steel
  • Copper

Surface Finishing of Overmolding & Insert Molding

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.

Overmolding vs Insert Molding

Overmolding process and insert molding process are two specialized injection molding techniques used to combine multiple materials or components into a single molded part. Here’s a comparison and explanation of the two processes:
overmolding process
Overmolding Process
insert molding process
Insert Molding Process
Molding Cost: Both overmolding and insert molding can accelerate production and reduce assembly costs which generate greater profits for high-volume orders. However, overmolding process may require additional material and labor as it involves two steps, making it potentially more expensive than insert molding process. Molding Process: Overmolding is a two-step process that involves injecting two-shots of resins to form the substrate and the overmolding. Insert molding is a one-shot injection molding process, but the metal insert needs to create in advance. Material Compatibility: The overmolding process often involves using different materials with compatible bonding properties. The insert molding process can accommodate a wide range of inserts, including metal, plastic, or electronic components. Both overmolding process and insert molding process provide unique benefits depending on the application requirements, offering improved functionality, reduced assembly processes, enhanced aesthetics, and cost savings. The choice between the two techniques depends on the desired outcome, design considerations, and specific project needs.
overmolding process
Injection Molding

All You Need to Know About Overmolding

Every day we come across tools, parts, and objects manufactured using over-molding. Manufacturers use over-molding to create tools, replace machine parts, and even manufacture toys. ...

Related Products of Overmolding & Insert Molding

Why Choose Zhongde for Your On-Demand Manufacturer

Zhongde has extensive experience, advanced equipment, and a commitment to quality. We offer competitive pricing, fast turnaround times, and excellent customer service. With a skilled team and state-of-the-art facilities, we ensure precise and reliable production. Whether you need rapid prototyping or high-volume on-demand manufacturing, Zhongde is your trusted partner for custom injection molding solutions.

Start A New Project Right Now!

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

FAQs of Insert Molding & Overmolding

View our FAQ center for more questions.

Factors such as material compatibility, design feasibility, and proper part alignment should be considered during the overmolding or insert molding process.
Overmolding and insert molding find applications in industries such as automotive, electronics, medical, consumer goods, and more, where product durability and functionality are crucial.
Yes, existing products can often be retrofitted with overmolding or insert molding to improve their performance, functionality, or aesthetics.
Consult with our experts who can assess your product requirements and guide you on the feasibility and benefits of utilizing overmolding or insert molding for your project.

Related Service of Zhongde On-demand Manufacturing

Knowledge Hubs

pp parts


Polypropylene (PP) is a commodity plastic with low density and high heat resistance. Excellent chemical resistance and food-safe grades.

Read More »
PP Material Plastic Parts


POM is an engineering thermoplastic with high mechanical strength, and rigidity, low friction, excellent wear resistance, and low moisture absorption.

Read More »