Insert molding is a process where thermoplastic resin is molded around another component. Often, metal components such as threaded inserts or fasteners are used in insert molding, but other components can be utilized like; plastics, ceramics and other materials. There are many benefits of insert molding which including; reduction in labor costs, reduction in part weight, improvements in quality, product functionality and improvements is the overall component structure. Also, Insert molding is more cost effective and an efficient solutions for a complex assembly.

Similar to Insert Molding, the overmolding process involves thermoplastic resin being molded over or around another material to form one solid component. Overmolding optimizes the production process of components with complex designs, overloaded assemblies, detailed cosmetic aspects, and improves bonding between the two resins.