Patent ID: 7943078
Filing Date: 2011-05-17
Classification: B29C

Abstract:
1. An RTM molding method comprising: disposing a reinforcing fiber substrate in a cavity of a mold consisting of a pair of dies, wherein an intermediate member having resin paths extending through said intermediate member in its thickness direction and having grooves for resin paths formed on its upper surface and through holes communicating with said grooves and extending to its reinforcing fiber substrate disposed-side surface opposite to said upper surface through said intermediate member is disposed between upper and lower dies forming said mold, liquid thermosetting resin is injected to said reinforcing fiber substrate from a plurality of positions via said intermediate member almost simultaneously, and a groove for discharging said resin which extends substantially over the entire circumference of said reinforcing fiber substrate, is formed on said lower die, clamping said mold, carrying out vacuum suction from a resin discharge line for a predetermined period of time of at least from a time after clamping said mold to a time starting resin injection, and injecting said resin to complete molding, wherein 1) divided areas with respect to a surface direction of said reinforcing fiber substrate are assumed, each divided area is one in which injected resin expands over the entire surface in said each divided area and can be substantially uniformly impregnated in a thickness direction of said substrate, and resin introducing paths are formed for respective assumed divided areas for introducing the injected resin into said respective divided areas, 2) a member for resin injection communicates with a groove formed on an upper surface of the intermediate member and 3) a member for resin discharge is nipped and sealed by the intermediate member and a lower die facing the intermediate member via the reinforcing fiber substrate.