Closed Molding

Closed mold processes such as Light Resin Transfer Molding (LRTM), Reusable Bag Molding (RSBM) and Vacuum Infusion Process (VIP) are used to produce precision parts at lower costs for a variety of applications. Typically, traditional composite tooling is used for the rigid base (or “A” side mold) in each these closed mold process, and several different materials may be used for the “B” side depending on the process. In closed molding, dry reinforcements are laid into the base mold, the mold is closed and resin is introduced into the closed cavity using a pressure pump or vacuum. When the laminate is cured the mold is opened and the part removed.