| 摘要 |
PROBLEM TO BE SOLVED: To dispense with excessive force for closing a mold by performing the blowing of a part of a preform in first work and performing the blowing of the residual part of the preform in second work. SOLUTION: At a first post 15, for example, a plastic material is injected in eight molds to simultaneously perform the injection molding of eight preforms. At a second post 16, eight preforms injection-molded at the first post 15 are readjusted. At a third post 17, the blowing to all of the readjusted preforms is performed at least at two points of time as two continuous works. That is, in first work O1, for example, the blowing of preforms on every one, that is, four preforms is performed. In the second work O2 performed in succession to the first work, the blowing of remaining four preforms is performed. At a fourth post 18, all of pins subjected to blowing at the third post 17 are discharged. |
