| 摘要 |
PROBLEM TO BE SOLVED: To provide a bladder for tire vulcanization, which inhibits the occurrence of puncture of the bladder at the inner surface side of a tire and rapidly detects the occurence of puncture so as to sufficiently reduce the occurrence of defective products due to puncture.SOLUTION: The bladder for tire vulcanization for use in vulcanization molding of a pneumatic tire includes at least one puncture generation part formed of annular ring groove on the upper outer surface having a thicker bladder gauge compared to a part in contact with the inner surface of the tire. The puncture generation part has a diameter of 5 to 10 mm and a groove depth of 60 to 70% of the bladder gauge. |
