| 摘要 |
PURPOSE:To prevent not only the generation of a crack but also a lowering of life due to the aging of rubber even when the rubber of a carcass is exposed to the surface of a side wall by laminating a weather-resistant rubber layer as the outer layer of the rubber lining cord layer of the carcass of a green tire. CONSTITUTION:After a green tire 20 is mounted to a core mold element 12 through a tire mounting machine, the core mold element 12 is mounted on a lower mold element 11 and an upper mold element 10 is allowed to fall to clamp a mold. Next, unvulcanized rubber is injected in a cavity in the volume corresponding to a lug and the outside part of a side wall from a rubber injection port 21 to fill said cavity and integrally bonded to the green tire 20 to perform vulcanization under heating. An outer layer rubber lining cord layer 9 is formed by coating cords 4 with rubber 6 having good adhesiveness to the cords 4 in a thickness of 0.1 - 0.7mm and subsequently laminating weather- resistant rubber 8 having a thickness of 0.3 - 1.5mm to the cord layer to cover the same. The vulcanized one is cut into an appropriate length as a carcass ply and assembled along with a bead core on a cylindrical former and molded to obtain the green tire 20. |
