The vacuum molding process begins with having loaded the cavity mold with fiber and then bringing the semi-flexible upper mold half into the cavity, making a closed molding cavity condition. The resin then feeds around the resin channel - around the parameter of the mold - and once the resin fills the channel, it then begins to enter the actual mold cavity. As it begins to enter the cavity, the signal is sent from the VMPC sensor on the mold skin to the pump head, which will control the flow rate and pressures entering the mold, giving us a concise resin flow and part thickness in the end of our molding.