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How do I choose the right double shot molding process for parts that need to bond two materials?

VIP-User
2026-11-04
{ "title": "How to Select a Double Shot Molding Process for Two-Material Parts", "content": "

Choosing a double shot molding process starts with matching the material combination to the part specification. Then determine the required alignment accuracy and cavity layout, and use trial parts and inspection results to confirm the tooling is ready for production. Longterm offers custom overmolding molds for hard-and-soft material pairs, including ABS+TPU and PP+TPE.

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Selection Criteria at a Glance

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  • Check that the proposed material pair meets the part requirements; ABS+TPU and PP+TPE are listed combinations.
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  • Define the alignment tolerance and decide whether a multi-cavity configuration is appropriate.
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  • Evaluate mold trials, dimensional results, and pre-shipment inspection findings before approving the tool.
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  • Consider the process for consumer electronics components such

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