Abstract: A wrinkle removal plate can maintain manufacturing accuracy while significantly reducing costs. A wrinkle removal plate for use in a press machine that molds a workpiece into a drawn product having a desired shape by press molding that uses a pair of molds comprising a first mold provided with a cavity and a second mold provided with a core, wherein the wrinkle removal plate is positioned at corner parts, which are to be drawn, of the opposing surfaces of the cavity and core, and is formed from a plurality of wrinkle removal parts that each have arms extending in two directions along the outer periphery of the corner parts.

Abstract: A die comprises a concave die, a blank holder, and a punch passing through the blank holder. The concave die has a first reference surface, a second reference surface that forms the bottom of a concave shape, and an upright surface connecting the first reference surface and the second reference surface. The blank holder has a blank holder surface that sandwiches a prepreg together with the first reference surface. The punch has a punch surface that sandwiches the prepreg together with the second reference surface, and a punch side face that sandwiches the prepreg together with the upright surface. There is a prescribed relationship between R1, which is the radius of curvature of the corner formed by the second reference surface and the upright surface, and R3, which is the radius of curvature of the corner formed by the punch surface and the punch side face.

Abstract: A method manufactures a thermoplastic fiber-reinforced resin molded article by pressing one thermoplastic fiber-reinforced resin prepreg, a plurality of laminated prepregs, or a plurality of prepregs. The method includes: a step in which the temperatures of an upper die and a lower die are set to 170-270° C.; a step in which the prepreg is placed between the upper die and the lower die; a step in which a load is applied to the prepreg so as to deform the prepreg; a step in which the temperatures of the upper die and the lower die are lowered at a speed of 5 to 50° C. per minute; and a step in which, after the upper die and the lower die are sufficiently cooled, the upper die is raised and a thermoplastic fiber-reinforced resin molded article is extracted.

Abstract: A method is provided in which a fiber-reinforced resin molded article having high dimensional accuracy is obtained by press molding a fiber-reinforced resin.

Abstract: A method is provided in which a fiber-reinforced resin molded article having high dimensional accuracy is obtained by press molding a fiber-reinforced resin.