| 摘要 |
PROBLEM TO BE SOLVED: To provide a molding process of gradient diameter tubes, which allows high efficient molding of gradient diameter tubes without requiring hand works. SOLUTION: The process comprises the first step of setting a cap, which covers increased diameter end of a molded article that is a gradient diameter tube, on a cavity bottom of a split die, and following steps; (b) the second step of forming a predetermined cavity between a core and the split die by fixing the core on the predetermined position of the split die cavity while mold clamping the split die, (c) the third step of molding the molded article by injecting a molten resin material into the cavity and cooling, (d) the fourth step of fixing the core by moving it to the position that allows the axial extraction of the molded article while mold opening the split die, (e) the fifth step of exfoliating the molded article from the core and extract in the axial direction of the core by applying pressurized air to an air pathway formed in the core and blowing the pressurized air from around core tip to a spacing between the core and the molded article. COPYRIGHT: (C)2007,JPO&INPIT |
