Rapid Custom Manufacturing

Reaction Injection Molding Bumper Prototypes

Project Overview:

Manufacturing Process: Reaction Injection Molding (RIM)
Tooling Material: Epoxy Resin, Silicone Rubber
Molding Material: Hei-Cast 8636-75A (Black) and 8636-B
Quantity: 3 Units
Lead Time: 25 days

Customer was an automotive design and engineering company in USA, wanted to test impact and high temperature resistance of this bumper by low volume rapid prototypes. Though customer was new to our RIM technique, found it was a proper and economical solution for this project.

A CNC milled and painted master model was used to make RIM tooling, this was similar to silicone rubber mold and vacuum casting process.
The finished RIM tooling. Injection molding by room temperature and fairly low pressure delivered the low mold locking pressure by simple clamps.

The maximum weight by one shot of injection molding was 35 kilograms, so our RIM process was available for molding the vast majority of parts.
Being different to injection molding by steel mold, our RIM had simple demolding system, and worked fine for insert molding and overmolding.

We are the RIM expert in China to provide customers quality RIM material, cheap and rapid tooling, fast delivery, especially for automobile field.
The trimmed, deburred, sandblasted and sanded parts. Customer was satisfied with the bumper's flexibility after impact resistance testing.