Insert Moulding
Insert injection molding is the process of molding or forming plastic parts around other, non-plastic parts, or inserts. The inserted component is most commonly a simple object, such as a thread or rod, but in some cases, inserts can be as complex as a battery or motor.
Overmolding involves injecting two shots of materials to form the substrate and the overmold. Insert molding only involves injecting one shot of molten plastic, though the metal insert needs to be purchased or created separately.