The Xometry app works best with JavaScript enabled!
Xometry Logo
CapabilitiesIndustriesResourcesSuppliesBecome a Partner
Sign In
Cookie Policy
Xometry stores cookies on your computer to provide more personalized services to you, both on this website and through other media. By using this website, you consent to the cookies we use and our Privacy Policy.

Overmolding Service

High Quality Process for Pilot Runs, Low-Volume Production, and Bridge Tooling

  All uploads are secure and confidential.
Overmolding partOvermolding part
Our Overmolding Service
Overmolding Materials
Overmolding Design Tips
Why Xometry?

Custom Overmolding With Xometry

Need overmolded parts that are truly custom? You have come to the right place. Xometry delivers high-quality, on-demand injection molding for prototypes and production parts.

Simply put, overmolding lets you combine multiple materials into one part. One material, usually a thermoplastic elastomer (TPE/TPV), is molded onto a second material, which is often a rigid plastic. Think about your toothbrush handle where the single piece has both rigid and rubbery components. It’s a great way to make plastic parts perform and look better. For a complete list of our thermoplastic elastomer and rigid plastic material choices, please see our injection molding capabilities page.

Xometry takes a “have it your way” approach to all types of injection molding, no matter your level of experience. We specialize in complex projects, including those requiring side action or hand loaded inserts. Our goal is to provide a long-term overmolding solution, moving beyond rapid prototyping, with dedicated project managers and engineering experts to communicate through all project stages from design to production. We offer molding solutions for every industry, including medical injection molding.

Xometry's Overmolding Finishes
SPI Finishes

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

As Molded

No secondary polishing or grinding. Part will show tooling marks.

Other Mold Texturing

Xometry can match other mold textures upon request.

Overmolding Design Tips


  • Wall thicknesses between 0.060" to 0.120" (1.5 mm-3 mm) generally provide the best bonding.
  • Keeping radii between 0.020" or 0.5mm minimum in corners reduces localized stresses.
  • If the part requires the use of thick TPE sections, they should be cored out to minimize shrinkage problems, reduce the part weight and lower cycle time.
  • Avoid deep or un-ventable blind pockets or ribs in your design.
  • Use gradual transitions between wall thickness to reduce or avoid problems with flow (back fills, gas traps, etc.)
  • The TPE/TPV should be less thick than the substrate to prevent warpage, especially if the part is flat, long, or both.
  • Overmolding needs mechanical or chemical bonding to the substrate, so your material choices should enable this.
toothbrushes made with overmolding
Other Types of Injection Molding at Xometry
Thermoplastic Injection Molding

Xometry delivers top quality plastic injection molded parts in as little as 10 business days. Our Manufacturing Partner Network can help you design and manufacture tools, dies, and molds for rapid tooling for prototyping to advanced mold making for production runs. Full injection molding capabilities including insert molding, unlimited undercuts, and internal/external threads are available.

Insert Molding

Xometry now also offers insert molding as part of its injection molding capabilities. We can even use our CNC machining services to produce custom metal and plastic inserts to integrate into the part. For a free insert molding design review and quote, upload your CAD files. Our expert team of injection molders will get back to you within 24 hours.

Range of Mold Making Options

Our vetted network of partners allow us to quickly convert your 3D part data into a high-quality injection mold at top speed. We offer services from design and manufacturing for tools, dies, and molds for prototyping and production runs. Plastic blow molds, aluminum and steel tooling, 2-shot and 3-shot molding are also available. And with Xometry, you own your own tools, so our partner network also offers mold maintenance services.

Why Choose Xometry for Overmolding?

Massive Network Capacity

Endless Options

Choose from millions of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.

Instant Quoting Engine

Easy to Use

Get your parts delivered right to your door without the hassle of sourcing, project management, logistics, or shipping.

Guaranteed Quality

Vetted Network

Only the top 6% of shops that apply to become Partners make it through our multi-tiered qualification process, so you can be confident your parts will be made right.

Overmolding services

Ready to get started on your custom overmolding quote?

Quick Links

  • Careers

  • Contact Us

  • Help Center

  • Legal

  • Our Story

  • Press

  • Xometry Go Green

Locations

  • 7940 Cessna Avenue
    Gaithersburg, MD 20879
    240-252-1138


  • 7315 Wisconsin Ave
    Suite 300 East
    Bethesda, MD 20814


  • 446 East High Street
    Lexington, KY 40507


  • 800 Winchester Rd
    Lexington, KY 40505


  • 11777 San Vicente Blvd
    Suite 747
    Los Angeles, CA 90049


  • 117 Wright Industrial Cove
    Jackson, TN 38301


  • Ada-Lovelace-Str. 9
    85521 Ottobrunn, Germany
    +49 32 22 109 8186

Xometry Go Green Initiative
1.0M+
LBS OF C02 OFFSET

Xometry
© 2020 Xometry, All Rights Reserved