公开(公告)号：US20190248087A1

公开(公告)日：2019-08-15

申请号：US16270791

申请日：2019-02-08

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Takuma WATANABE ,  Rung YIMPOOPHA ,  Sittichai APAIKAWIN

IPC: B29D30/72 ,  B60C13/00

CPC classification number: B29D30/72 ,  B29C48/07 ,  B29C48/12 ,  B29C48/21 ,  B29C48/49 ,  B29D2030/722 ,  B29K2021/00 ,  B29L2030/00

Abstract: The tire comprise a rubber assembly 15 including a first rubber member 11, a second rubber member 12, and a third rubber member 13 which are arranged in series in the cross-section including the tire rotational axis. The method comprises the steps of: extruding the unvulcanized rubber assembly 15 as two separate parts which are a first extrusion rubber portion 16 and s second extrusion rubber portion 17 divided at a division surface passing through the unvulcanized first rubber member 11; winding the first extrusion rubber portion 16 into a base annular body 20; and forming the unvulcanized rubber assembly 8 by winding the second extrusion rubber portion 17 so that only the first rubber member 11 included in the second extrusion rubber portion 17 overlaps with the first rubber member 11 included in the base annular body 20.