VACUUM RTM METHOD

PROBLEM TO BE SOLVED: To provide a vacuum RTM method capable of efficiently and surely manufacturing an FRP molded article with a high fiber volume content, no resin defect and a high quality. SOLUTION: The vacuum RTM method comprises a vacuum process A wherein a reinforcing fiber preform is arranged on a mold for molding, and is covered by a bag material and the inside is made vacuum by suction, a resin impregnating process B wherein a reinforcing fiber preform is impregnated with a liquid heat-curable resin at a specified temperature T0, and after the reinforcing fiber preform is impregnated therewith, impregnation is stopped, a first temperature elevating process C wherein the temperature is elevated to a specified temperature T1 higher than the temperature T0, a bleeding process D wherein at a temperature T1, an excess resin in the resin-impregnated reinforcing fiber preform is sucked/discharged, a second temperature elevating process E wherein the temperature is elevated to a specified temperature T2 higher than the temperature T1, and a curing process F wherein at the temperature T2, the resin is cured. COPYRIGHT: (C)2009,JPO&INPIT