Threaded inserts in injection molding are metallic components embedded into plastic parts to create strong, reusable threads for fasteners. They enhance mechanical performance and durability.
Inserts are placed in the mold before injection, with plastic material flowing around them during molding.
Types include heat-set, ultrasonic, and molded-in inserts, each suited for different applications.
Heat-set inserts are installed post-molding using heat, while ultrasonic inserts use ultrasonic vibrations.
Molded-in inserts are positioned during molding. Critical considerations include insert material (brass, stainless steel), design (knurled, threaded), and placement accuracy to ensure optimal adhesion and load distribution within the molded part.