Overmolding is the process of inserting a plastic or rubber substrate into a mold and encapsulating the substrate with rubber or plastic. If the substrate material is similar to the encapsulating material, a strong molecular bond is formed between the two materials. Dissimilar materials can be overmolded using a mechanical interlocking bond or an adhesive.

ST Plastics has over twenty years of experience with overmolding both similar and dissimilar materials. Colson’s engineers are available to help determine the material selection, design, and mechanical interlock or adhesive systems to help solve your overmolding problems.

ST Plastics’ facility has its own individual molding competencies involving insert molding, overmolding, molding high-temperature materials, molding thick wall products, and molding difficult, complex shapes.

Materials processed at Colson facilities include, but are not limited to, Acetal, Nylon 6, Nylon 6,6, Polyurethanes, Thermoplastic Elastomers (TPE), Polyethylene, Polypropylene, ABS, Polyesters, Polyvinyl Chloride (PVC), Polycarbonate, and glass-filled materials. With over 30 million pounds of engineering resin and over 10 million pounds of commodity resins purchased each year, Colson uses its material supplier partnerships to provide technical support for developing material solutions.

ST facilities utilize automation and the latest technology to manufacture products. All Colson facilities are manned by committed, dedicated associates in a non-union environment.