Method and apparatus for forming a raw tire

摘要

An apparatus (1) comprises a pasting unit (6) for pasting an inner peripheral surface of a tread ring (A) to a raw tire base body (B) moving with a former (3) in an axial direction of the tire. The pasting unit comprises a ring-like base body (5). The ring-like base body includes a grasping tool (11) having several segments (13), and a pushing-down pasting tool (12) having an annular rubber body (15) disposed on each side of the segment. The segment is capable of abutting against an outer peripheral surface of a tread ring to grasp the tread ring by advancing inward of an inner surface of the ring-like base body. The tread ring including a belt ply and a tread rubber is aligned with an outer periphery of a raw tire base body on the former in which tire members including a carcass ply are combined. The tread ring is transferred into the apparatus, the raw tire base body is expanded from its cylindrical shape to its toroidal shape and the tread ring is pushed against the toroidal raw tire body. The rubber body is expanded by charging an internal pressure to push down a shoulder side portion of the tread ring to paste the shoulder side on the toroidal raw tire base body.