Molded Plastic Part, a Division of Proto Part Inc.

Industries served include: medical, defense, safety, electronic/electrical, industrial, and aerospace markets in mid to high volume production runs. Proto Part has made parts for electronics, aerospace, solar, automotive, and other industries, plus unusual items like cribbage pegs, golf tees, tape containers, and spools for archery bowstrings. We serve companies large and small and manufacture a comprehensive range of engineering and commodity resins to produce custom plastic components.


Injection Methods

We utilize both horizontal and vertical/vertical injection molding press ranging from 28 to 310 clamping tons with shot sizes from 1 to 25 ounces. Our molding processes are established utilizing scientific injection molding principles and decoupled molding.


Because of our extensive years of experience with plastic tool and injection molding, our engineers can help with a part design for manufacturability as well as meeting the structural and design requirements for its intended use.

We are proud to be an ISO 9001:2015 certified company.