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    • 2. 发明专利
    • Method of molding a synthetic resin blow bottle
    • JP5270216B2
    • 2013-08-21
    • JP2008115910
    • 2008-04-25
    • 株式会社吉野工業所
    • 高雄 飯塚隆之 小林
    • B29C49/18B29C49/78B29L22/00
    • PROBLEM TO BE SOLVED: To provide a method of efficiently molding a synthetic resin blown bottle of high quality with a constricted part in the content-filled space. SOLUTION: This method includes the following molding procedures: first, a preform P is disposed inside a blow mold 7 and an insert 7a for forming the constricted part is brought close to the preform P. Next, a stretching work for the preform P using a stretching rod 8 under the retained state where the insert 7a is brought close to the preform P and a primary blow molding for blowing the air into the preform P. After these procedures, the air is blown into a molded form obtained by the primary blow molding under the same pressure as applied in the primary blow molding, and a secondary blow molding for finishing the shape finally is performed. When the synthetic resin blown bottle with the constricted part formed in the content-filled space by dividing the barrel part 3 at least, in an upper half and a lower half, is molded, the blow flow amount of the air during the primary blow molding is set smaller than the blow flow amount of the air during the secondary blow molding. COPYRIGHT: (C)2010,JPO&INPIT