Apparatus for mounting tread ring on tire base and method for manufacturing retreaded tire

A method for manufacturing a retreaded tire by the use of an apparatus for mounting an annular tread ring made of vulcanized rubber on an outer peripheral surface of a tire base,

• the apparatus comprising:
• a tire base holding section which holds the tire base and which is movable in an axial direction of the tire base between a first position and a second position, and
• a tread ring mounting section which mounts the tread ring on the outer peripheral surface of the tire base and which is disposed on the second position side of the tire base holding section,
• the tread ring mounting section comprising
• a tread holder for holding the inner circumferential surface of the tread ring, and
• a tread pushing-out device for pushing out the tread ring held by the tread holder in the axial direction,
• the tread holder comprising a plurality of paddle plates arranged on a circle concentric with the tire base and having holding surfaces for holding the inner circumferential surface of the tread ring, and
• the tread pushing-out device comprising
• push-out plates being movable in the axial direction on the holding surfaces of the respective paddle plates and having abutting surfaces capable of abutting a side face of the tread ring on the second position side, and
• a pusher moving means for pushing out the respective push-out plates toward the first position,
• said method comprising the steps of:
• holding a tire base by the tire base holding section at the first position,
• holding the tread ring by the paddle plates at the second position,
• moving the tire base held by the tire base holding section to the second position so that the tread ring is placed radially outside the tire base, and
• mounting the tread ring on the outer peripheral surface of the tire base by moving the push-out plates toward the first position so that the tread ring is pushed out from the paddle plates toward the first position, and at the same time, by moving the tire base held by the tire base holding section toward the first position at the same speed as the pushed-out tread ring.