Method for molding hollow molded article, and stretching rod and injection stretch blow molding machine used in the method

Abstract

A method for molding a hollow molded article, which can suppress deformation of a preform and shorten a molding cycle of the hollow molded article, and a stretching rod and an injection stretch blow molding machine used in the method are provided. The method for molding a hollow molded article, includes: an injection molding process of injection molding a preform; and a blow molding process of obtaining a hollow molded article by stretch blow molding the preform in a blow molding section. The blow molding process includes a preform supporting step of inserting a distal end portion of a stretching rod into the preform and bringing the distal end portion into contact with the preform to support the preform, and a preform separation step of supplying blow air into the preform to release the contact between the preform and the distal end portion.

Dependencies are inferred from the claim text.