Overmolding Services

Overmolding is an advanced plastic injection molding technique used to combine two or more thermoplastic materials into a single, unified part. This process begins by injecting the first thermoplastic, known as the substrate, which forms the core structure of the product. A second material, called the overmold, is then injected either around or onto the substrate, bonding with it as the materials cool. The overmolding technique enhances the durability, functionality, and aesthetics of products, commonly used in high-volume production for industries that require high-performance parts, such as automotive, medical devices, and electronics.

 

Unlike two-shot/2K molding (a separate process covered on our dedicated page), overmolding uses a standard injection molding machine and pre-manufactured inserts, making it ideal for low-to-medium volume runs, complex insert geometries, and custom material combinations.