| 摘要 |
PURPOSE:To extract the parison without any deformation by dividing an expander member in the vicinity of the parts, and providing insertion-directional side parts in such a freely rising and falling state that the rising position during the period of an expansion operation and the falling position fallen toward the extraction-directional side parts during the period of extracting the parison. CONSTITUTION:An expander member 4 can be fallen toward the extraction- directional side parts 17 in its insertion-directional side parts 18. The insertion- directional side parts 18 in a fallen position is set to generally be housed within the space of an opposed thin wall parts of the parison 5 by the expansion operation of the extraction directional side parts 17 to the parison 5, and the space defined by a range of being occupied by the insertion-directional parts 18 when the insertion-directional side parts 18 falls at right angles with respect to the extraction-directional side parts 17 in the space direction. Accordingly, even in the expander material 4 of the insertion-directional side parts 18 curved to the extraction-directional side parts 17, it can be extracted not deforming the parison 5. |
