| 摘要 |
PURPOSE:To form a branched pipelike article by injection molding without using a mold having complicated structure by a method wherein molten resin and gas are poured from a mold portion corresponding to the end of one branched pipe in the molding of the multiply-branched pipelike article. CONSTITUTION:Resin and gas are poured from the positions of mold corresponding to the end of a multiply-branched pipelike molded article. The amount of molten resin to be poured by injection is one, which does not completely fill a cavity, but is enough to fill the cavity when pressurized gas is poured in the cavity. The pressurized gas is poured through the gas gate 2 of the mold cavity. The molten resin is forcibly spread to the terminal of the flow passage, resulting in forming continuously hollow part. After releasing, the terminal parts 3 of the branched pipe are cut, resulting in obtaining a continuous hollow pipe. |
