| 摘要 |
The present invention provides a method of forming a radial tire. With this method, after a carcass band (CP), which has been formed in advance on a second band forming drum (2) into a cylindrical shape so that the outer peripheral length thereof is equal to the inner peripheral length of a bead core (BC), is elastically deformed temporarily into a standing wave shape, the bead core is located at a predetermined position on the outside of the carcass band. The elastic deformation of the carcass band is vanished, and the carcass band is pressed against the inner peripheral surface of the bead core to form a first assembly. The first assembly is held by a first transfer (7) from the outside, and an inner liner band (IL), which has been formed in advance by a first band forming drum (1) into a cylindrical shape such that the outside diameter thereof is smaller than the inside diameter of the first assembly, is located at a predetermined position in the first assembly held by the first transfer. The inner liner band is expanded and pressed against the inner peripheral surface of the first assembly to form a second assembly. Then, a third assembly (SW) composed of a sidewall, chafer, etc., which has been formed in advance by a third band forming drum (3) into a cylindrical shape such that the outside diameter thereof is smaller than the inside diameter of the second assembly, is located at a predetermined position in said second assembly. The third assembly is expanded and pressed against the inner peripheral surface of the second assembly to form a fourth assembly, and the fourth assembly held by the first transfer (7) is moved to a predetermined position on the shaping drum, where the fourth assembly is formed into a toroidal shape and assembled to a belt-tread assembly (BT), which is formed into a cylindrical shape separately, to form a green tire. |
