Resin Transfer Molding
Resin Transfer Molding
“Resin Transfer Molding (RTM)” is used when both inside and outside have to have a finished surface and/or part thickness is critical. Tooling cost is more for this process because of the heavy structured tooling needed to withstand the hydraulic pressure when the male & female tools are closed. But, the part piece price goes down because its less labor intensive and automated.
Process - Fiberglass mat pre-cut patterns are placed in the female tool. The male tool is hydraulically forced into the female tool. Through pressure the resin flows through the part. When the resin cures the male tool is then ready to take out.