Profile: Proto-cast, LLC provides custom plastic injection molding and mold fabricating. We are accredited with ISO 9000 and MIL-I-45208 certification. We work with materials such as nylon, acrylics, polycarbonate, fluoropolymer and polyethylenes. Our reinforced materials include polyphthalamide, polyphenylene sulfide and polyetheretherketone. We serve the medical, electronics and sporting good industries.