Co-molding

Co-molding is also called to overmolding. It refers two plastic materials to bond, which usually are a hard material like ABS and a soft material like TPE. However, it could be two same hard materials to bond together depending on the melting temperature.

Plastopia has been specialized in co-molding (overmolding) for 10 years. Contact us for a quote.

Cold molding in injection molded parts

Here are two comolded plastic parts for a basic idea.

Pros and cons on co-molding

Pros

Aesthetically pleasing color contrasts
Good and soft grip touch
Save assembly cost
Parts to be bond together tightly

Cons

Add tooling and molding cost
Risk to have flashing

Alternative solutions for co-molding

Considering setup cost, there are alternative solutions to not co-mold:

Use other rubber liquid molding to make the soft material. One of the typical application is O rings.

Use glue to assembly after molding.

Design Guide for Injection Molding

Add holes for hard materials so that two materials could be bond tightly.

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Co-molding

Cold molding in injection molded parts

Pros and cons on co-molding

Pros

Cons

Alternative solutions for co-molding

Design Guide for Injection Molding

Services

Texture Cards & Book

Resources

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