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发明公开
CN104512202A 充气轮胎的制造方法及充气轮胎 有权

充气轮胎的制造方法及充气轮胎
摘要：
本发明提供，通过卷带法能够简便地成型抑制硬度在区域之间的急剧变化且能提高性能改善效果的胎面胶的充气轮胎的制造方法、和由该方法制造的充气轮胎。将同时挤出硬度互不相同的橡胶(21)和橡胶(22)而成的橡胶带(20)以螺旋状卷绕，由此形成构成胎面胶(10)的橡胶带卷绕体。在中心区域(Ce)中，通过增大橡胶(21)的剖面积比而主要配置橡胶(21)，在胎肩区域(Sh)中，通过减小橡胶(21)的剖面积比而主要配置橡胶(22)。另外，从中心区域(Ce)向胎肩区域(Sh)逐渐减小橡胶(21)相对于橡胶带(20)的剖面积比，在胎肩区域(Sh)的至少一部分，将持有橡胶(21)和橡胶(22)的复合界面(20c)的橡胶带(20)在胎面厚度方向重叠并卷绕。
摘要（英）：

A method of manufacturing a pneumatic tire has a winding step of forming a rubber ribbon winding body constructing a tread rubber by spirally winding a rubber ribbon obtained by co-extruding a first rubber and a second rubber which are different in hardness. The first rubber is mainly arranged in a first area by making a cross sectional area ratio of the first rubber greater than that of the second rubber. The second rubber is mainly arranged in a second area by making the cross sectional area ratio of the first rubber smaller than that of the second rubber. A portion in which the cross sectional area ratio of the first rubber becomes smaller by smaller is provided from the first area toward the second area. The rubber ribbon retaining a compound interface is superposed and wound to at least a part of the second area.

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