| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin molded product, capable of enhancing the quality of the resin molded product 1 by making it hard to generate burr in a horizontal hole part 4, in molding the resin molded product 1 wherein a non-piercing inner diameter hollow part 3 is provided in a cylindrical part 2 and the horizontal hole part 4 communicating with the inner diameter hollow part 3 is provided to the peripheral surface of the cylindrical part 2. SOLUTION: In a manufacturing method for forming the inner diameter hollow part 3 by a cantilevered mold part at the time of molding of the molded product 1 and forming the horizontal hole part 4 by the other mold part coming into contact with the cantilevered mold part and arranging a molding material injection gate 11 on the side of the non-piercing end part 2a of the cylindrical part 2, a taper surface is preliminarily provided to the leading end part of the cantilevered mold part and a component force for pressing the other mold part to the cantilevered mold part is generated by applying material injection pressure to the taper surface from the gate 11 and planes are preliminarily provided to the contact part of both mold parts and brought into close contact with each other to bring both mold parts to a mutual close contact state.
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