Tire manufacturing method
In a manufacturing method of a tire which manufactures a side-wall rubber as a constituent member of the tire by winding a rubber strip formed of unvulcanized rubber on a carcass ply serving as a rotating body, the method includes the steps of: winding the rubber strip prior to vulcanization in a spiral manner having a partially overlapping region, so that at least part thereof is exposed at an outer surface, and another portion thereof is covered by the rubber strip after being wound; and arranging an electronic component so that the electronic component is positioned in the partially overlapping region of the rubber strip or between the carcass ply, etc. serving as the lower layer member of the rubber strip and the rubber strip, in the winding step or an earlier step thereto.
1. A tire manufacturing method for a tire which manufactures a constituent member of the tire by winding a rubber strip formed of unvulcanized rubber, the rubber strip having, in a cross-section, a sloped face in at least a part thereof, the tire manufacturing method comprising:
rotating a molding drum and a body arranged on the molding drum;
winding the rubber strip, prior to vulcanization, on the rotating body in a spiral manner having a partially overlapping region, so that at least part thereof is exposed at an outer surface, and another portion thereof, which includes at least part of the sloped face, is covered by the rubber strip after being wound; and
arranging an electronic component at the sloped face so that the electronic component is positioned in the partially overlapping region of the rubber strip, in the winding step, wherein the electronic component is covered by a protective member that includes a rubber sheet having a modulus 1.1 to 2 times greater than a modulus of the rubber strip and lower than a modulus of coating rubber of a carcass ply of the tire.
2. The tire manufacturing method according to claim 1 , wherein, in the arranging step, the electronic component is arranged at the rubber strip after at least a portion of the rubber strip is wound on the rotating body.
3. The tire manufacturing method according to claim 1 , wherein, in the arranging step, the electronic component is arranged at the rubber strip prior to being wound on the rotating body.
4. The tire manufacturing method according to claim 1 , wherein, in the winding step, a first layer is wound so as to cover a lower layer member of the rubber strip, a second layer is wound so that at least part of the first layer is exposed at the outer surface, a third layer is wound so that at least part of the second layer is exposed at the outer surface, and a fourth layer is wound so that at least part of the third layer is exposed at the outer surface, and, in the arranging step, the electronic component is disposed at any position among: between the first layer and the second layer, between the second layer and the third layer, and between the third layer and the fourth layer.
5. The tire manufacturing method according to claim 1 , wherein a layer of the rubber strip at which arranging the electronic component is selected in the arranging step is based on a desired embedding depth position from the tire outer surface, and a desired arrangement position in a tire-radial direction.
6. The tire manufacturing method according to claim 1 , wherein the electronic component is arranged so that a longitudinal direction thereof becomes a direction of a tangential line to a circumferential direction of the tire.