Profile: Plasti-Coil, Inc. offers injection molded plastic parts and component assemblies. We are an ISO 9001:2008 certified company. Our custom molded plastics include gears, electronic connectors, core cases, motor components, and over-molded coils. Our coil winding bobbins are used in transformers, solenoids, relays, motors and fuel pumps. Our coil winding bobbins are subjected to high heat treatment. Plastic insert molding is a custom molding process, where plastic is injected into a mold. The inserts are generally metal or some other higher temperature plastics. Overmolding is an injection molding process in which two or more plastics and/or elastomeric materials are molded simultaneously within the same tool.