METHOD FOR PRODUCING THERMOPLASTIC RESIN MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a thermoplastic resin molding which can further suppress the occurrence of gloss nonuniformity. SOLUTION: In the method for producing the thermoplastic resin molding, a mold is clamped while a molten thermoplastic resin is supplied between a pair of male and female molds to contact the cavity surface of the male and the female molds, or after the supply of the resin is finished, and after the mold is clamped, the resin is pressurized and cooled. The relationship between the average flow velocity V1 (mm/s) of the molten thermoplastic resin on the surface of the mold cavity during the supply of the molten resin and the average flow velocity V2 (mm/s) of the molten resin on the surface of the mold cavity during a period from the end of resin supply to the completion of mold clamping is expressed by the formula: 0.5