| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of certainly restraining both of noise and vibration. SOLUTION: A cross-section area of a meridian plane cross-section at a mold dividing position 43 is made smaller than a cross-section area of a meridian plane cross-section at a mold sector central position by repeatedly changing a cross-section area of a bead filler 26 in the tire circumferential direction. Consequently, it is possible to lower rigidity of the bead filler 26 at the mold sector central position 44 which is a part to be easily thicker in thickness of the tread part in vulcanization and molding the pneumatic tire lower than rigidity of the bead filler 26 at the mold sector central position which is a part to be easily thinner in thickness of the tread part. Accordingly, it is possible to restrain the noise and vibration caused by a rigidity difference in the tire diametrical direction in the tire circumferential direction and as a result of it, it is possible to restrain both of the noise and the vibration. COPYRIGHT: (C)2008,JPO&INPIT |
