| 摘要 |
PROBLEM TO BE SOLVED: To efficiently manufacture a side-reinforced run-flat tire by using minimum equipment. SOLUTION: An inside cylindrical member is formed by winding an inner liner, side reinforcing rubber and the like around a drum 12B. An outside diameter of the drum 12B at a reduction in the diameter is preset so that an outside diameter of the inside cylindrical member can be smaller than an inside diameter of a bead core and that of an outside cylindrical member. The outside cylindrical member, is formed by winding a first carcass ply and a second carcass ply around a drum of a first molding drum, is inserted into the bead core and pressure-bonded by enlarging the diameter. The inside cylindrical member is inserted into the outside cylindrical member and pressure-bonded by enlarging the diameter, so that a cylindrical member can be finished. A green tire is finished by sticking a side wall, a belt, a tread and the like on the cylindrical member. By virtue of the disuse of a special drum wherein a groove is provided in an outer peripheral surface, the drum does not have to be prepared depending on the type of the tire, and the run-flat tire can be efficiently manufactured by using the minimum equipment. COPYRIGHT: (C)2004,JPO |
