Rubber Molding with Inserts
Insert molding is the process whereby metallic or other high temperature resistant materials are overmolded or encapsulated with bonded rubber. Typical insert molded items are used in sealing (valve stems and poppets, sealing plates), in damping (vibration mounts) and in general product reinforcement (strengthening a bolt hole location with a bonded in place washer). By using specialized primers we can vulcanize any rubber material directly onto virtually any substrate (provided the substrate can withstand molding pressure and temperature) and produce a permanent bond that is stronger than the rubber material itself.
Normally utilizes transfer or injection molding, though compression molding can be suitable for large inserts
Substrate must withstand high pressures and temperatures of at least 285F for 20min.
Vulcanized bonds are superior in strength to secondary "glued" adhesion and will withstand the same chemical and temperature exposure as the rubber material