| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing apparatus for a tire which reduce the contraction amount of rubber after being pasted to a tire molding drum (core drum). <P>SOLUTION: Tension is not applied to a rubber strip material between the core drum and a roller die 12 by eliminating a speed difference between the wind-up speed V1 of the core drum and the pull-out speed V2 of the roller die 12. Also, the cross sectional area of the rubber strip material which has been extruded from a mouthpiece 15 is made smaller by accelerating the wind-up speed V1 and the pull-out speed V2 higher than an extruding speed V3, and stretching the rubber strip material between the mouthpiece 15 and the roller die 12 by applying tension to the rubber strip material. The extruding speed V3 from the mouthpiece 15 is higher than a conventional extruding speed, and therefore, the pulling amount becomes V2/V3<V2/V3', and the pulling amount and the contraction amount in this embodiment can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
