| 摘要 |
PURPOSE:To forcibly cool a parison uniformly and in a short period of time at the time of blow molding. CONSTITUTION:A blow nozzle 21 is inserted into the inside of a cylindrical parison 1 while the parison 1 is held between split molds 12, 13 from the right and left sides, and a fluid A is blown into the parison 1 through the blow nozzle 21, whereby the parison 1 is swollen toward the inner wall faces of the split molds 12, 13. A bag-shaped elastic member 31 mounted to the blow nozzle 21 is swollen inside the parison 1 to a predetermined size, and the parison 1 closely contacted to the inner walls of the split molds 12, 13 is forcibly cooled by the fluid flowing through a flow passage 41 formed between the bag-shaped elastic member 31 and the inner face of the parison 1. |
