The Traditional Way
The traditional RTM process begins with loading the mold cavity with a fiber, typically fiberglass or similar reinforcement material. Once the mold is closed and clamped, the resin pump begins pumping catalyst and resin, as two separate components to the mix head, where the components mix and are fed into the mold as a single component material. The mold then fills, and as you see in this illustration, the mold fills excessively leaking resin around the parameter and out of the vents. That has been a historical problem with the process, one that has been corrected today and is unnecessary use of materials and VOC’s as it has been in the past.
Today the process begins the same way using dry fiber reinforcement, typically fiberglass or similar reinforcing material. The resin and catalyst pump simultaneously the moment the mold is closed and clamped under force. The catalyst and resin meet precisely at the same time at the mix head and are completely mixed together as a single component as they’re pumped into the mold. The mold is controlling its internal pressures by our MPG valve, which is unique to our process, and sends signals back to the pump head as we communicate with what’s going on inside the cavity and preventing, as you see, any resin from leaking around the parameter or out of the vents. We in effect, have today, emulated the thermal plastic injection molding process and have taken closed molding to an entirely new level.