The part is either made in an enclosed mold like you would plastic injection or on a former with a vacuum bag. A predetermined amount of glass or carbon is layed into the part dry and the mold or bag sealed and put under vacuum. The resin is then infused through the part, a predetermined amount of resin is injected into the part and the resin is drawn through the part by the vacuum. the parts are usuallt heat treated too if it's a composite like epoxy/carbon. Advantages are exact resin / fibre mix in the composite, less material waste, very precise parts produced. Disadvantages are expensive to do, lots of equipment needed. Also called VARTM, SCRIMP and others. |