| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for vulcanizing a pneumatic tire without reducing design flexibility and productivity while enhancing the dimensional accuracy of the pneumatic tire.SOLUTION: A method for vulcanizing a tire comprises: setting a green tire T in a die 1; and pressing the green tire outside in the tire radial direction by inserting a bladder 2 into the green tire T to expand the bladder to vulcanize and mold the green tire. A tire vulcanization inner die 3 comprises: a rigid reinforcing ring 4 consisting of a cylindrical ring, interposed between the inner peripheral surface of a region corresponding to a tread portion of the green tire T and the outer peripheral surface of a region corresponding to the tread portion of the bladder 2; a connection end part 6 clamped in the central mechanism of a vulcanization molding machine together with the end portion of the bladder 2; and a mooring band 5 for coupling the rigid reinforcing ring 4 and the connection end part 6. A stress required for performing a predetermined amount of tensile deformation in the circumferential direction of the rigid reinforcing ring 4 is larger than that required for performing a predetermined amount of compressive deformation in the circumferential direction.SELECTED DRAWING: Figure 1 |
