| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a laminated release container wherein a ventilation hole can be easily and surely formed on an outer layer without impairing an inner layer. SOLUTION: After mold clamping wherein an injection core 1A, a lip mold 2, and a cavity mold 3 are fitted to each other, molten resin is jetted from a nozzle 6, the jetted molten resin is introduced into the cavity via a hot runner nozzle 4, and an outer layer preform 7A is formed. The cavity mold 3 has a pin storing part 3a. A pin 13 is, in a slidable manner, provided in the pin storing part 3a. A tip part of the pin 13 is protruded onto the cavity side when the molten resin is casted, and abuts against a side surface of the injection core 1A. In a stage wherein the preform 7A is formed by this pin 13, a through- hole 71 becoming a vent hole comes to be formed therein. |
