Method and apparatus for producing green tires
AssigneeBridgestone Corporation
InventorYuichiro Ogawa
Life of this patent
Estimating the term…
Abstract
An unvulcanized rubber member passed from the transfer terminal end of a liner to the outer peripheral surface of a winding roller is transferred and press-fitted to a winding body by rotating the winding roller. By this, the unvulcanized rubber member is transferred from the transfer terminal end of the liner to the winding body while being restrained by an outer peripheral surface of the winding roller. Thus, even if vibration is applied to a transfer means due to a diagonal waving, the winding position and the wound shape of the rubber member can be maintained substantially unchanged.
Claims8
A method for producing green tires, comprising the steps of:
- transferring a ribbon-like unvulcanized rubber member towards a winding body by running a flexible liner along with the unvulcanized rubber member from a supply roll in its longitudinal direction, and separating the unvulcanized rubber from the liner at a transfer terminal end of the liner by turning back the liner by a strip-shaped separating member arranged close to the winding body;
- and
- using a winding roller arranged close to the transfer terminal end of the liner and having a diameter larger than a distance between the winding body and the transfer terminal end of the liner during winding of the unvulcanized rubber member, the winding roller having an outer peripheral surface which partly extends to bridge the transfer terminal end and the winding body, passing the separated unvulcanized rubber member onto the outer peripheral surface of the winding roller, rotating the winding roller so that the unvulcanized rubber member is transferred to the winding body while the winding body is rotating about its center axis so as to be urged and press-fitted to the winding body, and simultaneously moving the winding roller and the separating member along an outer peripheral surface of the winding body by a diagonal waving means, thereby winding the unvulcanized rubber member multiple times around the winding body while being shifted in a width direction.
An apparatus for producing green tires, comprising:
- a transfer means including a flexible liner movable in a longitudinal direction for transferring a ribbon-like unvulcanized rubber member along with the flexible liner from a supply roll toward a winding body rotatable about a center axis, and a strip-shaped separating member arranged close to the winding body, for turning back the liner and thereby separating the unvulcanized rubber member from the liner at a transfer terminal end of the liner;
- a rotatable winding roller arranged close to the transfer terminal end of the liner and having a diameter larger than a distance between the winding body and the transfer terminal end of the liner during winding of the unvulcanized rubber member, the winding roller having an outer peripheral surface which partly extends to bridge the transfer terminal end and the winding body, so that the unvulcanized rubber member passed from the transfer terminal end of the liner is passed onto the outer peripheral surface of the winding roller during rotation thereof, and urged and press-fitted to the winding body;
- and
- a diagonal waving means for moving at least the winding roller and separating member along an outer peripheral surface of the winding body, thereby winding the unvulcanized rubber member multiple times around the winding body while being shifted in a width direction.
Dependencies are inferred from the claim text.