Vacuum infusion

Vacuum infusion (also called Resin Infusion) is an industry wide term describing a composite manufacturing process whereby the fabric reinforcement and resin are prepared separately. Resin infusion is used in open moulded composite manufacture and involves the tailoring, positioning and laying up of all the reinforcement fabric in a dry state, followed by the application of the vacuum bag. Before the mould is fully sealed, various inlet taps are positioned and linked into a network for introducing the liquid resin. The physics behind the process means that because of a pressure differential the resin is “sucked” up the inlet tubes and dispersed across the dry fabrics, sometimes aided by channels or grooves in the core material, or mesh that is designed to aid uniform fluid flow.