| 摘要 |
PROBLEM TO BE SOLVED: To keep the temp. of an underside of a neck part by suppressing the cooling of an upper part of a cavity and to thinly stretch a body part from the underside of the neck part. SOLUTION: A cavity is formed from a cavity mold 1 for molding a body part 11 and a bottom part 12 of a preform 10, a neck mold 3 fitted to the upper part of the cavity mold 1 to form a neck part 13 of the preform 10 and a core mold 4 piercing the neck mold 3 to be inserted into the cavity mold 1. The upper part of the cavity coming into contact with the neck mold 3 of the cavity mold 1 is partially made low in heat conductivity to be suppressed in cooling to keep the temp. on the underside of the neck part of the preform high. |
