Overmolding Service

Custom Overmolding With Tiandiao

Need overmolded parts that are truly custom? You've come to the right place. Tiandiao 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.
Tiandiao 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.

Tiandiao'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
Tiandiao 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.

Other Types of Injection Molding at Tiandiao

Thermoplastic Injection Molding
Tiandiao delivers top quality plastic injection molded parts in as little as 10 business days. Our Manufacturing can help you 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
Tiandiao 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, send 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 allows 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 Tiandiao, you own your own tools, so our partner network also offers mold maintenance services.

Why Choose Tiandiao for Plasma Cutting?

Endless Options Choose from thousands of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.	Easy to Use Get your parts delivered right to your door without the hassle of sourcing, project management, logistics, or shipping.	Guaranteed Quality We conform with ISO 9001:2015