| 摘要 |
PURPOSE:To manufacture the double walled hollow object of a large depth readily, by holding a closed-end parison between a pair of left and right cavity molds in a preblow state, shaping the inner layer wall of a concave section by pushing up a core mold from the under side and clamping said cavity molds. CONSTITUTION:A core mold 6 being pushed from the under side to a closed-end parison 4 in a preblow state and cavity molds 3, 3 being clamped from right and left direction of the closed-end parison 4, while an inner layer wall 11 is molded from the under part 4a of the closed-end parison 4 by the core mold 6 and an outer layer wall 13 is formed by the cavity molds 3, 3. By this, the double walled hollow object with is deeper than the size of its opening can be manufactured by a blow molding quite readily. |
