Vacuum Assisted Resin Transfer Mold
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Vacuum-assisted resin transfer molding (VARTM) refers to a variety of related processes that represent a still fastest-growing molding technology. The salient difference between VARTM-type processes and RTM is that in VARTM, resin is drawn into a preform through use of a vacuum only, rather than pumped in under pressure. VARTM does not require high heat or pressure. For that reason, VARTM operates with low-cost tooling, making it possible to inexpensively produce large, complex parts in one shot.