In the field of vacuum-assist-resin-transfer-mold (VARTM) processing, a new system
is provided to lower production times and to create a high permeability mold cavity
with reduced directionality to yield an optimum flow-front. The system comprises
the use of a high permeability layer to evacuate air from the mold cavity and may
include a reusable port-runner device for introduction of resin into the fiber
mat. In the preferred embodiment, the high permeability layer is a "felt-like"
material constructed of synthetic fibers, and the reusable port device is a flat,
modular unit. In another embodiment, the high permeability layer is a fluid-impervious
material with sporadic protrusions, and the reusable port-runner device is a flexible,
silicone unit. Other embodiments are comprised of any combination thereof. Each
embodiment is designed to minimize set-up times and to create a mold cavity with
a low resistance to fluid flow through the application of pressure differentials.