| abstract |
[PROBLEMS] A suitable RTM for a relatively large FRP molded product that can ensure good molding quality without generating an unimpregnated portion or voids. A molding method is provided. An RTM in which a reinforcing fiber base is arranged in a cavity, a liquid resin is injected into the cavity, and the resin flows into the reinforcing fiber base and is impregnated with the resin. In the molding method, a plurality of injection ports for injecting a resin into the cavity are provided, and a detection unit for detecting the presence of the injected resin is provided in the cavity, and a signal from a detection sensor of the resin detection unit is provided. An RTM molding method, wherein timing of starting resin injection from each injection port is controlled. |