| 摘要 |
PURPOSE:To attempt to improve durability to falling by providing a fitting part held in a die in a drawing part of a bottom, the first drawing part capable of forwarding in a cavity and the second drawing part displaceable in the upper and lower direction. CONSTITUTION:A bottom part forming die 1c has a fitting part in a lower part of recessed parts 5a and 5b for forming a cavity, the first drawing part 7 fitted in the fitting part 6 and the second drawing part 8 fitted in the first drawing part 7 and the bottom forming die 1c is supported by means of a supporting device. The first drawing part 7 pushing the central part of a bottom part 3b of a plastic bottle molding 3a in the cavity is held slidably in a round opening 6a of the fitting part 6 and the first drawing part 7 is displaced in the upper and lower direction by means of the first push-out pin of the supporting device. In addition, the second drawing part 8 is held slidably in a round opening 7a of the first drawing part 7 and is displaced in the upper and lower direction by means of the second push-out pin of the supporting device. Durability to falling of a plastic bottle filled with a content is improved thereby. |
