Rapid Custom ManufacturingRapid Custom Manufacturing

Reaction Injection Molding Bumper Prototype

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: 20 Units
Lead Time: 18 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.
RIM tooling The Core Advantage of Our Reaction Injection Molding:

Being similar to silicone rubber mold & vacuum casting, a master model was also used to make our RIM tooling. The very low viscosity of RIM material delivered the fairly low injection molding pressure and temperature that allowed the feasibility of RIM tooling to be made of silicone rubber and epoxy resin, so our RIM tooling was made extremely cheap and fast.
RIM ToolingBeing different to conventional injection molding techniques of tight tooling locking force, the low injection molding pressure and temperature allowed low locking force for our RIM tooling, usually simple clamps used.
RIM partThe reaction injection molded bumper prototype. It usually took 2-3 hours (depending on the part size and volume) to complete one RIM part from closing tooling to opening tooling and taking out the molded part.


The Disadvantage of Our RIM:

The material and surface finishing took majority of our RIM part cost and time, this was why our RIM was not proper for projects of production quantity over 200 units as the expensive material and finishing cost will considerably weaken our RIM tooling advantage of price and time.


RIM Expert in China:

We are respected in RIM industry in China for our dedication to provide quality RIM material, cheap and rapid tooling, fast turnaround to clients, especially from automobile field.
 reaction injection molded part