| 摘要 |
PROBLEM TO BE SOLVED: To enhance heat conductivity of a tire vulcanizing bladder to an unvulcanized tire, and to regulate quickly a temperature of the unvulcanized tire to shorten a vulcanization time. SOLUTION: The bladder 20 is arranged in an inside of the unvulcanized tire G stored in a vulcanizing mold, a heating medium is supplied to an inner face 23 side of the bladder 20, heat of the heating medium is transferred from the bladder 20 to the unvulcanized tire G, and the unvulcanized tire G is heated thereby to be vulcanization-molded. A plurality of dimple-like recesses 24 with a cross-sectional shape comprising a smooth curve is arranged in an inner face of the bladder 20, thin-walled parts are formed in the bladder 20 by the recesses 24, to enhance the heat conductivity. The plurality of recesses 24 is arranged in a prescribed range, the heat conductivity of the bladder 20 is set in response to each part, to regulate properly the heat conductivity of the bladder 20, and a temperature elevation time is quickened in thick portions of the unvulcanized tire G and the bladder 20, to shorten the vulcanization time. COPYRIGHT: (C)2011,JPO&INPIT
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