| 摘要 |
PROBLEM TO BE SOLVED: To provide a preform for a blow-molded container with the principal shape and size, of a mouth and neck part (4), set as specified and the principal shape and size of a blow-molded part (6) set as specified, regardless of fluctuations of the fill of synthetic resin materials (64, 164 and 264) during compression-molding, without creating a low strength part locally in the preform (2) as well as a method and a device for compression-molding the preform. SOLUTION: The synthetic resin materials (64, 164 and 264) of a larger volume than that of a molded vacancy are supplied to molding dies (18, 118 and 218) and additional parts (66, 166 and 266) corresponding to an excess amount of the synthetic resin materials (64, 164 and 264) are formed. |
