Manufacturing e.g. long smooth composites by controlled differential pressure resin transfer molding requiring distortion-resistant mold sections with channels distributing resin to narrow-slot cavity entries

摘要

Channels (6) beneath the molding surface (300) of the distortion-resistant mold section (3), extend over its length. They are connected to the molding surface. Preferred features: Bores or longitudinal slots (7) connect channels to the molding surface. Channel diameter is a multiple of connection width. At each end of the channels, valves (8, 9) control resin injection and sinking (16). In an otherwise similar development, injection tubes are inserted into the channels, having connections (slots or bores) into the mold cavity.