Obtain High-Quality Custom Overmolded Products | Select From A Broad Range Of Materials And Finishes | Project Management And Professional Support Included With Every Order
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EPTAHUB is a provider of custom overmolded components, providing high-quality, on-demand injection molding for both prototyping and production quantities.
We adopt a consultative approach to every injection molding project, making sure we meet your specific needs no matter your team's level of experience. Our expertise covers complex projects, including those that involve side actions or hand-loaded inserts.
We focus on delivering long-term manufacturing solutions. Clients receive support from dedicated overmolding project managers and engineering professionals who handle the entire process, from design validation to production. We serve all industries, including specialized areas like medical injection molding, and offer molding services.
Overmolding is a flexible manufacturing process that bonds one material, usually a thermoplastic elastomer (TPE/TPV), to another material (typically a rigid plastic substrate) using injection molding equipment. This process offers a strong combination of aesthetics, haptics, and functional performance, bringing benefits such as superior grip, shock absorption, impact resistance, enhanced surface protection, and better chemical insulation to improve the tactile experience.
A major advantage of overmolding is its ability to smoothly fuse multiple materials into a single, durable component through mechanical or chemical bonding. This technique is ideal for projects that require customized designs, flexibility, or enhanced functionality, and it cuts down manufacturing costs by combining parts into a single, integrated component.
While TPEs like TPU and TPV are widely preferred for overmolding due to their flexibility, durability, and strong bonding abilities, other materials such as Nylon, Polypropylene (PP), and Polycarbonate (PC) are also popular options for specific applications. The table below compares these commonly used overmolding materials, highlighting their unique characteristics and advantages.
| Capability | Production Tool | Production Tool | Bridge Tool | Prototype Tool |
|---|---|---|---|---|
| Thermoplastic Vulcanizate (TPV) |
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-- |
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| Thermoplastic Polyurethane (TPU) |
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|
-- |
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| Liquid Silicone Rubber (LSR) |
|
|
More heat-resistant and biocompatible than TPEs, but less flexible and not as easy to bond with rigid plastics |
|
| Polycarbonate (PC) |
|
|
Better impact strength and transparency; lacks softness and grip-enhancing properties |
|
| Nylon (Polyamide, PA) |
|
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Higher strength and wear resistance, but lacks flexibility and softness |
|
| Polypropylene (PP) |
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More affordable, but generally less durable, flexible, and bondable |
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A range of finishes from Grade 3 diamond / high polish to 320 stone low polish. Finishes include: SPI A-1 SPI A-2 SPI A-3 SPI B-1 SPI B-2 SPI B-3 SPI C-1 SPI C-2 SPI C-3 SPI D-1 SPI D-2 SPI D-3
No secondary polishing or grinding is required, and the part will display tooling marks.
Eptahub can match other mold textures when requested.
Automatic quote generation for custom plastic molded prototypes and production batches | Nearly infinite material and finishing selections | Expert engineering evaluations and project administration included with every order
Produce Sturdy, Functional Prototypes and Production Parts Through Insert Molding
Tough, High-Strength Components for Demanding Uses
We can provide millions of combinations of materials, surface treatments, tolerances, markings and certifications for your order.
Parts are directly delivered to your door, eliminating the need for you to find suppliers, manage projects, handle logistics or arrange transportation.
We hold ISO 9001:2015, ISO 13485, AS9100D and IATF 16949 certifications.
Learn how to easily obtain an instant quote for Overmolding services through the EPTAHUB Instant Quoting Engine®.
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Our automated quoting system gives you instant pricing so you can quickly estimate your project costs.
For high-precision or complex parts, our senior account managers can provide more detailed quotes and help you find the best overall solution for your needs.
