プレス成形体の製造方法、及びプレス成形体の製造装置

Japanese Patent JP6643126

B2

PROBLEM TO BE SOLVED: To provide a method for producing a press-molded body by cold-pressing a composite material containing a discontinuous carbon fiber and a thermoplastic resin that solves problems in a conventional technology and is excellent in shape flexibility corresponding to various shapes.SOLUTION: A method for producing a press-molded body by cold-pressing a composite material containing a discontinuous carbon fiber and a thermoplastic resin satisfies formulae (1) and (2) and includes the following steps 1 to 5: a step 1 of arranging a heated composite material in a molding die; a step 2 in which a time period from a pressure start time t0 to a time t1 at which the pressure reaches a flow start pressure Pf is 1 second or less; a step 3 in which the pressure reaches a maximum pressure Pm at a time t2; a pressure holding step 4 of pressing the composite material at an average holing pressure Pk from the time t2 to a time t3; and a step 5 of opening the molding die, and taking out a molded body from the molding die. The formula (1) is 4