Method for manufacturing fiber reinforced resin molded article, and manufacturing device thereof

A method for manufacturing a fiber reinforced resin molded article, the method including forming a preform including a fiber layer on an outer surface of a liner, impregnating the fiber layer of the preform with resin, and curing the resin, comprising:

• a step of preparing a mold having a movable core disposed therein, the movable core having a pressure sensor for detecting a pressure of resin flowing in the mold and being movable relative to the preform at a position facing a resin flow end portion of the preform;
• a step of placing the preform in the mold in a state where the movable core is pressed against the resin flow end portion of the preform;
• a step of pouring resin into the mold;
• after a lapse of a predetermined time from resin-pouring start or after it is determined that the resin flow end portion of the preform is completely impregnated with resin,
• a step of moving the movable core in a direction away from the preform to separate the movable core from the preform to form a gap as a resin flow path between the resin flow end portion of the preform and the movable core, and flowing resin into the gap;
• and
• a step of moving the movable core in a direction toward the preform to reduce the gap between the resin flow end portion of the preform and the movable core,
• wherein it is determined whether the resin flow end portion of the preform is completely impregnated with resin at least on the basis of the pressure of resin detected by the pressure sensor in the step of pouring resin into the mold.