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Double injection molding

Double injection molding or 2-shot molding combines two plastic materials injected into the mold to form a single part with two visible colors. This process allows for clear windows, colored lettering or graphics or just a decorative and stylish appearance to your part.

This process has been used for keycaps and buttons on telephones and other products for many years. The molded-in graphics are embedded in the part and will not wear off with use. Clear sections can be utilized with backlighting for readability in dim or dark applications.

double injection molding
double injection molding

Parts from double injection molding can be designed in arrays to reduce assembly labor and eliminate defects from improper orientation common with individual parts.

Colors are easily changed to allow using one mold to produce parts with different appearances for product differentiation.

In the over-molding process, a soft TPE (Thermoplastic Elastomer) is molded over a base of a rigid material.

This process produces a soft feel to the product as well as improved impact properties and increased value. this over-molding process is a kind of simple semi-double injection molding process.

Selective plating is also applied to enrich the decoration.


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