| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for production of pneumatic tire by which the defect of ply winding can be prevented without damaging a molding workability and thereby, a production efficiency can be improved in the molding work of a bead part having a structure such that a carcass ply is wound back to a bead core, and also to provide a pneumatic tire obtained by the method. SOLUTION: A stiffener has a block structure to be made by laminating twin stiffener rubbers 1A and 1B. The method for forming the stiffener comprises: winding both end portions 3a of a carcass ply 3 in a tire width direction around the periphery of the bead cores 2; sticking the inside stiffener rubber 1A of the side contacting the bead core to the center side on the carcass ply 3 from a bead core-locating position in the tire width direction; erecting the inside stiffener rubber 1A to stick on the bead cores by inflating the carcass ply in a toroid shape while locking the bead cores 2; and sticking an outside stiffener rubber 1B to the inside stiffener rubber 1A from outside in the tire width direction. COPYRIGHT: (C)2008,JPO&INPIT
|
