© Colonial Engineering

Custom Injection Molding
ISO 9001:2008 Certified

Complete engineering and production expertise resulting in high quality, thermoplastic parts to meet your needs.

Primary processes include Injection Molding, Assembly and Fabrication through value added/value engineered operations.

Materials Molded:  PVC, CPVC, ABS, Acetel, Noryl, Nylon 6, Nylon, Acrylic, Polypropylene, Polyethylene, HDPE, High Density Polystyrene,  Polycarbonate, Minlon, Celcon, Santoprene, Rynite, Uniprene, Flexible PVC, Delrin, Polyester, Glass Filled Materials, and related thermoplastic polymers

  • Production Injection Molding
  • Part weights ranging from 0.5 oz  to  37.50 lbs.   Examples of large parts molded at Colonial:  Plastic pallets, custom pipe-fittings, valve boxes, chassis for Mini-RV, industrial bins, large filter screens, packaging caps, tank-bases, and other parts.
  • Insert Molding, Painting, Pad-printing, Decorating
  • Secondary operations, including Sub-assembly, CNC mill and lathe capabilities, drilling and tapping
  • New tooling; Tooling improvements
  • Ultrasonic Welding
  • Prototyping - concept to production
  • Quality parts, on time, at a competitive price.

2,500 & 2000-ton presses capable of running PS, PP, PE, PVC & other thermoplastics.

Markets Served:  Appliance, Water Treatment, Tier II Automotive and Truck (Class A and functional parts), Plumbing, Pool/Spa, HVAC, Industrial OEM

Two production facilities to meet your needs:

Colonial Engineering, Inc.
6400 Corporate Avenue
Portage, MI, 49002
Ph:  800-374-0234
Fax: 269-323-0630


Colonial Manufacturing, LLC  dba
Empire Molded Plastics
1246 E. Empire Avenue
Benton Harbor, MI 49022
Ph: 269-926-1000
Fax: 269-926-6510

Production Facilities Capability Listing