Resin Transfer Molding
In resin transfer molding (RTM), the pre-stabilized preform is placed into the mold, the mold is closed, and resin is injected into the mold. The closed mold is typically heated to a constant temperature to enact the cure. The part is either cured completely in the mold, or carefully removed mid-cure and allowed to finish curing outside the mold.
Low Pressure RTM (LP-RTM) is a well established and robust composite manufacturing process. The matched and closed tools typically used allow for complex and reproducible part manufacturing. High Pressure RTM (HP-RTM) is particularly suitable for fast cycle times needed for mass production. Vacuum assisted RTM (VARTM), in turn, is most suitable for prototyping.
See the system in action in this video.