| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a high pressure as container liner, by which a material can be reduced and weight can be reduced as well. SOLUTION: This is a manufacturing method of a high pressure gas container liner, by which thickness reduction working is performed to a material 11, and after that, the mouth part closing working of a tip part 13 is performed. In the thickness reduction working, it is performed so that a thickness-reduced part 14 and a thickness-nonreduced part 15 are formed. By using the mouth part closing working of the tip part 13, the mouth part closing working is performed to the thickness-nonreduced part 15.
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