| 摘要 |
PURPOSE:To make it possible to properly blow-mold even when resin with severe drawdown is used. CONSTITUTION:A blow pin 9 has the structure consisting of an outer tube and an inner tube are coaxially arranged therein so as to introduce main blow high pressure fluid in the inner tube part and to introduce pre-blow low pressure fluid in the annular part made between the outer tube and the inner tube. On the other hand, poison 4 is hung down without sealing its lower end. The blow pin 9 is rotated with the hanging of the parison 4 so as to be lowered. Finally, the parison 4 is hung under the condition as mentioned above down to the position, at which the parison 4 is pinched with molds for mold clamping, resulting in easily forming even with resin having severe drawdown and improving transferability. |
