发明名称 |
PNEUMATIC TIRE MANUFACTURING METHOD |
摘要 |
This manufacturing method of a pneumatic tire having a tread reinforcing layer reduces tire mass while maintaining the durability performance of the tire. A tread reinforcing layer formation step includes a winding step for winding belt-shape plies around an approximately cylindrical winding surface. The winding step involves: a first winding step in which, with the side edges of the belt-shape plies spaced from one another, said belt-shape plies are spirally wound from a first end located on one side of the tire in the axial direction, to a second end located on the other side of the tire in the axial direction; and a second winding step in which, with the side edges of the belt-shape plies spaced from one another, said belt-shape plies are spirally wound from the second end to the first end in the direction opposite that in the first winding step. A lattice-form tread reinforcing layer is formed that has gaps substantially rhombic in shape and bounded by the belt-shape plies. |
申请公布号 |
US2016271895(A1) |
申请公布日期 |
2016.09.22 |
申请号 |
US201415034265 |
申请日期 |
2014.10.10 |
申请人 |
SUMITOMO RUBBER INDUSTRIES, LTD. |
发明人 |
OTANI Masafumi |
分类号 |
B29D30/16;B29D30/60;B29D30/70 |
主分类号 |
B29D30/16 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for manufacturing a pneumatic tire comprising a carcass extending from a tread portion through sidewall portions to bead cores in bead portions and a tread reinforcement layer disposed radially outward of the carcass in the tread portion, the method comprising:
a tread reinforcement layer formation step of forming the tread reinforcement layer, wherein the tread reinforcement layer formation step comprises a winding step of winding a long belt-like ply formed by covering one or more reinforcement cords with a topping rubber around an approximately cylindrical winding surface, the winding step comprises: a first winding step of winding the belt-like ply in a spiral manner from a first end portion located on one side in a tire axial direction to a second end portion located on the other side in the tire axial direction while separating side edges of the belt-like ply from each other in turn; and a second winding step of winding the belt-like ply in a spiral manner reversely with respect to the first winding step from the second end portion to the first end portion while separating the side edges of the belt-like ply from each other in turn to form a grid-shaped tread reinforcement layer having approximately diamond-shaped spaces surrounded by the belt-like ply. |
地址 |
Kobe-shi, Hyogo JP |