METHOD AND APPARATUS FOR PRODUCING BIAXIALLY STRETCHED BLOW MOLDED CONTAINER

摘要

PROBLEM TO BE SOLVED: To produce even a bottle wherein pressure resistance or heat/pressure resistance is required without generating a sink or crack in the bottom part thereof by intensively cooling the part easy to generate a crack of the bottom part of a container having a complicated bottom shape. SOLUTION: Air is directly blown against the inner surface of the bottom part of a container V held in a mold after biaxial stretch blow molding at a position where a sink or crack is easy to generate through a stretching rod 5 having an cooling air supply passage 10 up to the leading end part thereof along the axis thereof and having the first cooling air blowoff holes 11 communicating with a cooling air supply passage formed to the leading end part thereof in a radial direction to intensively cool the same.