| 摘要 |
PURPOSE:To reduce keeping cost or transport cost by subjecting a preform for forming a bottle composed of a synthetic resin to streching blow within a mold to mold the bottle and reducing the volume of the molded bottle within the mold so as to make the same smaller than that at the time of the filling of the bottle with content. CONSTITUTION:A preform 1 for forming a bottle composed of a synthetic resin is heated to stretching aptitude temp. and subjected to stretching blow within molds 9a, 9b having a plurality of gas introducing ports 11 to form a bottle 3. For example, the bottle 3 thus obtained is constituted of a non-flexible mouth part whose diameter is smaller than that of a body part, the body part having flexibility, a shoulder part having higher rigidity and larger wall thickness as compared with the body part and a bottom part. Subsequently, the volume of the bottle 3 is reduced within the molds 9a, 9b to produce a volume decreased bottle 10. For example, when the reduction ratio of,the inner volume of the bottle 10 is set to 50%, the bottle 10 can be kept or transported in quantity about twice that of the bottle 3 before decreased in volume. |
