| 摘要 |
A thin-walled shoulder of a tubular container is formed without changing the appearance and shape of the tubular container, and enhancing the work efficiency when the neck and the body of the tubular container are integrally molded. A method of manufacturing a tubular container (1), comprises the first step of attaching a thin-walled tube (15) to a tube holder (17), the second step of softening the inside of the end (15a) of the thin-walled tube (15), the third step of contracting the end of the thin-walled tube (15) for close contact, and the fourth step of molding a neck portion (5) and a shoulder portion (9) using a male die (16) for the end of the thin-walled tube (15). Since hot air is sucked after heating the thin-walled tube (15) and the outer wall surface (21) is cooled, the subsequent processes can be smoothly conducted, and further it is possible to mold a tapered thin-walled shoulder portion (9) without changing the appearance and shape of the tubular container (1). It is also possible to apply a marble pattern to the neck portion and the shoulder portion simultaneously with the molding of tubular container (1).
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