Insert molding is a plastic injection molding process in which thermoplastics is molded around an inserted piece(s) placed in the molding cavity. The resulting product is an integrated assembly with a strong bond between the thermoplastic and insert.

Heat-Set threaded inserts, external threads, bushings, or electrical connectors are commonly used, but just about any substance can be used that can withstand the heat and pressure of the injection molding process.

This type of overmolding is an alternative to products assembled with fasteners, adhesives, and soldering with additional benefits:

  • Reduced Cycle Time and Labor Costs
  • Reduced Size and Weight
  • Improved Product Reliability
  • Accuracy Insert Placement
  • Improved Part Strength
  • Design Flexibility