Formed in 1971, Proper Mold & Engineering is one of the largest manufacturers of plastic injection molds in the United States. The company serves various manufacturing industries and provides a range of solutions for development of plastic products for several appliance and consumer products industries. Its design development programs include product design, mold fill analysis, Computer-Aided Design platforms, global communications and research and development. Proper Mold & Engineering provides aluminum tooling class code options that includes aluminum tooling with hand load and fall out inserts for specific programs. Headquartered in Warren, Mich., the company maintains one of its locations in Anderson, S.C.