| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure that reduces rolling resistance of a pneumatic tire. <P>SOLUTION: A green tire 1G of a pneumatic tire including a cylindrical annular structure 10, an unvulcanized rubber layer 11G, which becomes a tread portion, is formed along a circumferential direction of the annular structure 10 on an outer side of the annular structure 10, and a carcass portion 12 including fibers covered with rubber, provided on at least both sides in the width direction of a cylindrical structure 2 including the annular structure 10 and the unvulcanized rubber layer 11G, is disposed in a vulcanization mold 20. The vulcanization mold 20 is split into side plates 20Sa, 20Sb and a sector 20C at a position on the inner side in the width direction of the annular structure. Next, a bladder 21 inside the green tire 1G is pressurized after closing the side plates 20Sa, 20Sb and before closing the sector 20C. The sector 20C is closed and vulcanization is started. <P>COPYRIGHT: (C)2013,JPO&INPIT |
