| 摘要 |
PURPOSE:To obtain stably a favorable molded product even if molding is performed repeatedly continuously for a long period of time. CONSTITUTION:In an injection mold for manufacturing a hollow molded product, at least two pieces of back flow prevention mechanisms 10, 10' are provided in pressurized fluid passages 16, 17 of a pressurised fluid injection nozzle 9 and a heating device 13 is provided close by those. |
