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The overmolding process is similar to the Insert Molding process. In this process a thermoplastic material is molded on top of another plastic part. The “insert” in this case is plastic part. This allows for an injection molded parts to have (2) or more materials in the same part. The parts can have a mechanical or chemical bond to each other, depending on the resin types selected. Ergonomics have pushed this process and allow for parts to have a hard substrate for rigidity, yet be covered with a softer material for the interface portion of the product.
The simplest, most robust injection molding