Vacuum Infusion Process
Vacuum Infusion Process (VIP) produces high quality, consistent parts for demanding applications.
Like other closed mold processes, VIP uses a rigid “A” side base mold, but unlike other processes, it uses a thin bagging film being as the “B” side or counter mold. Specialty reinforcements are laid into the base mold, with bleeder cloth and bagging film sealed onto the base mold. A vacuum is pulled through ports in the bagging film and catalyzed resin is pulled into the mold cavity based on the level of vacuum pressure.
This process is highly controllable because it’s governed by the principles of D’Arcy’s law, meaning there are three variables that affect the flow of the resin: permeability of the reinforcement construction, viscosity of the resin, and the pressure differential in the cavity in relation to atmospheric pressure.
If all three of these variables are unchanged, the infusion process will flow consistently with each injection for a given part. This also provides a very accurate bill of material for a given part since the resin and fiberglass usage is constant. The vacuum infusion process brings all of the environmental advantages of a closed mold process as styrene emissions are minimized due to the resin curing in a closed environment. It also produces an excellent glass-to-resin ratio with minimal-to-no voids in the finished laminate.
Composites One offers a variety of resources to help manufacturers transition to VIP. As a founding member of the Closed Mold Alliance, we can help source the equipment and raw materials needed along with hands-on training to put VIP to work in most operations.
As a founding member of the Closed Mold Alliance, Composites One can help manufacturers source the right products, equipment and hands-on assistance to put Reusable Bag Molding to work in their plants.
To see more videos of Vacuum Infusion visit the Closed Molding Knowledge Center.
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