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.

 

RTM Ilustration

 

See the system in action in this video.