| 摘要 |
PURPOSE:To make thickness of a container main body uniform and to make a mold itself tough by a method wherein a slit is made longitudinally in a core and the core is inserted in a cavity; after the upper end of the core is fixed by means of a fixed mold, a wedge part of a knockout pin is inserted in the upper part of the slit to fix the base part and the upper end part of the core. CONSTITUTION:A core 29 with a slit 36 is inserted longitudinally in a cavity 25 and the base part and the periphery of the apex of the core 29 are fixed and a wedge part 34 of a knockout pin 28 is inserted in the upper part of a slit 36 to prevent the core 29 from vibration caused by pressure of a molten resin in the radial direction. Then, the molten resin is injected from an opening 8 side of a container main body 1 and a fascia 7 extending from the upper end of the opening 8 to the lower end and continuously integrating on a neck part 4, a shoulder part 5 and a side wall part 6, the neck part 4, the shoulder part 5 and the side wall part 6 are simultaneously injection-molded to prepare a container main body 1. After cooling, the container main body 1 is taken out from the cavity 25 by means of a knockout pin 28 and the container main body 1 simultaneously injection-molded is adhered with a bottom plate 2 with channels 12 and 13 which are inserted in the lower ends of the side wall part 6 and the fascia 7 of the container main body 1. |
