| 摘要 |
PURPOSE:To obtain products having excellent durability by blow modling method by greatly reducing the occurrence of defective products by a method in which the peripheral wall of a product and the peripheral wall of an insert are integrally molded by using plural parisons in such a way as to exactly maintain the air-tightness of molds. CONSTITUTION:A core 2 and air pins 4 are set in place between blow molding devices, 1 for example, and given amounts of parisons 6 are discharged from the blow molding devices, molds 3 are clamped, and air is supplied into the parisons 6 in the molds 3 from the air pins 4. The parisions 6 are pressingly contacted with the peripheral face 2a of the core 2 and the inner wall faces 3a of the molds 3 and molded into a given form. The molds 3 are opened and a spherical float 5 is obtained. |
