Patent ID: 9616622
Date: 2017-04-11
CPC Classifications: B29C,B29K,B29L

Claim:
1. An RTM method in which a preform formed from a reinforcing fiber substrate is placed in a cavity of a molding die, and resin is injected from a plurality of injection ports into said cavity and impregnated into said preform, comprising: disposing the plurality of injection ports in first positions in a central section of said cavity corresponding to positions of said preform located in a product area of an article to be finally molded and second positions located in a periphery of said cavity corresponding to positions of said preform outside said product area of said article to be finally molded or corresponding to positions inside said cavity but outside an area of said preform, wherein curing of the resin progresses first from a region of a central section of the preform to a peripheral section of the preform; and causing the timing of closing said injection ports after resin injection to be different from each other between injection ports disposed in said first positions and injection ports disposed in said second positions, said injection ports disposed in said first positions being closed prior to said injection sorts disposed in said second positions, and said injection ports disposed in said second positions being closed after curing of the resin in the central section of the preform and during curing of resin in the peripheral section of the preform.