(EN) A temperature adjusting part 40 inserts a temperature adjusting rod 42 into a preform 10 and brings the temperature adjusting rod 42 in contact with the inner surface of a body 12 of the preform 10 while preserving a boundary section with a neck 11. Thereafter, the temperature adjusting part 40 moves the temperature adjusting rod 42 by a prescribed distance D1 toward a bottom surface (lower body)12c side of the body 12 so as to extend the preform 10.
(ZH) 温度调整部(40)向预成型件(10)内插入温度调整杆(42),使温度调整杆(42)不与主体部(12)的与颈部(11)的边界部分相接触地与预成型件(10)的主体部(12)的内表面相接触,然后,使温度调整杆(42)向主体部(12)的底面部(下方主体部)(12c)侧移动预定距离(D1)来使预成型件(10)拉伸。