Graco Inc.

Reaction Injection Molding (RIM)

Equipment that injects materials into a fixed mold

Reaction injection molding (RIM) involves the injection of liquid polyurethane systems into a mold. The components then polymerize within the mold to form a part. Reaction injection molding is used in a score of industries and products, including doors, windows and decorative millwork for the construction industry; interior components such as steering wheels, dashboards and NVH (noise, vibration, harshness) applications for the automotive industry; military and aerospace applications; computer enclosures in the electronics industry; and insulation in refrigerators in the appliances industry. Learn more.