| 摘要 |
PROBLEM TO BE SOLVED: To surely form a discharge hole for a pressurized fluid and to increase cooling speed by making the pressurized fluid flow without deviation in a hollow part of a hollow double wall molded article. SOLUTION: After a molten parison is arranged between opened molds 11 and 12, the molds are closed to form a pinch-off part 4 by placing the parison between mold compression parts 11b and 12b under a full flash condition. Then, a blowing means is plunged into the parison and a pressurized fluid is introduced therein to expand it along cavities 11a and 12a to form a hollow double wall molded article P1 and a nozzle 13 is plunged from the neighborhood of the pinch-off part through a nozzle inserting hole 14a of a guide push 14 to open a discharge hole by means of the nozzle 13 and the pressurized fluid is made to flow in the hollow part of the hollow double wall molded article P1 to cool it from the inside by discharging the pressurized fluid from the discharge hole. |
