PTI Engineered Plastics is a custom injection molder and manufacturer of plastic components and assemblies. PTI is a diverse company servicing the medical, automotive, defense/aerospace, and commercial/consumer products industries. From low to high volume, simple to complex, prototype to production, PTI delivers quality end products. Our 155,000 square foot advanced manufacturing facility offers 4,000 square feet of ISO Class 8 Cleanroom and 5,000 square feet of controlled environment with both areas offering assembly and packaging services. PTI offers an array of value-added services and is fully versed in IQ/OQ/PQ validation protocol, and Production Part Approval Process (PPAP).

PTI Engineered Plastics History

PTI is a privately held company, founded in 1984, which operated under the name of Proto-Tech Industries until 1987. Proto-Tech Industries produced functional prototype molds and injection molded samples before changing our name to PTI Engineered Plastics. The name change was driven to better reflect the turnkey, mind to manufacturing operations that PTI is today. In 2011, PTI expanded its design capabilities with the launch of PTI Design, an in-house design studio that specializes in product innovation and development.

Reliable medical equipment can often spell life or death, and we take that responsibility very seriously.

PTI Engineered Plastics provides medical device manufacturers with full-service advanced product development delivered in a compressed timeframe. With superior design, tooling, and molding capabilities, PTI turns product visions into reality and gets your product to market first.

We have been serving the medical industry for more than 30 years, specializing in handling complex, multi-part programs and medical device molding for a variety of customers. Our direct contact with doctors and other medical professionals gives us insight into their needs and helps define and assist with final product solutions.

Capabilities include:

Plastic Injection Molding

Design / Design Assist

  • Mold Design
  • Additive Manufacturing


  • Secondary Operations
  • Assembly
  • Packaging

Validation Services


   Injection Molding            Industrial Design           In-House Tooling            Prototyping

Quality Certifications



PTI Engineered Plastics, Inc.

50900 Corporate Dr.

Macomb, MI 48044


Phone: 586.263.5100

Fax: 586.263.6680

Contact: Cheryl Kaiser