As an extension of our Resin Transfer Molding (RTM) expertise, AEC offers our customers the capability to perform Vacuum assisted Resin Transfer Molding (VaRTM) for large composite structures.
VaRTM is a process for molding fiber reinforced composite structures in which a sheet of flexible transparent material such as nylon or Mylar plastic is placed over the preform on the mold and sealed. A vacuum is applied between the sheet and the preform to remove entrapped air and the part is placed in an oven for cure. The addition of pressure further results in higher fiber concentration and provides better adhesion between layers of sandwich construction.
The VaRTM process reduces the tooling requirements and can offer cost savings compared to the RTM process in applications where surface requirements are less stringent.