| 摘要 |
PURPOSE:To permit the control of the height of a bladder at a predetermined height upon shaping process before vulcanizing a tire, by a method wherein, a stopper, provided with a screw, which engages with a female screw on the inner surface of a center post, is provided to permit the center post to be stopped at an arbitrary position upon moving upward. CONSTITUTION:A hexagonal pillar 11b, integral with a lower ring 11, is provided with a screw on the upper end thereof and a nut 51 is screwed to fix it. A center post 8 is provided with a female screw on the inner surface thereof and a stopper 52 which fits to the female screw is screwed thereinto pivotably while the stopper 52 is provided with a hexagonal hole which fits loosely to the hexagonal pillar 11b on the inner surface thereof. A distance between the stopper 52, provided in the lower ring 11, and the nut 51 is set to an arbitary dimension by rotating the center post 8 through a bladder retainer 9 by an input or the like. According to this method, the height of the bladder upon inflating preliminary for shaping a green tire is controlled and the configuration of the tire upon vulcanizing it may be controlled. Further, a vulcanizing time may be shortened by increasing a steam pressure for the shaping. |
