Proto Plastics, Inc. is an ISO registered, full-service contract manufacturer of custom plastic injection molding parts and assemblies. The company was founded in 1969 and the manufacturing plant and offices are located in Tipp City, Ohio. Proto Plastics maintains a 65,000 sq. ft., fully-equipped production, assembly, and mold building & repair facility. Proto Plastics designs, manufactures, assembles, and distributes plastic injection molding tools and parts. We run primarily engineering grade plastic resins and specialize in technically demanding, close tolerance parts required in a wide variety of industries such as High-Tech/Electronics, Automotive, Aerospace, Medical, Telecommunications, Industrial & Business Equipment, Government/Defense, Safety, Instrumentation & Control, and Construction.