Disclosed is a pressure roll and a method for pressing a tire layer on a tire building drum in a pressing direction, wherein the pressure roll includes a shaft and a plurality of discs, wherein each disc has an interior part and an exterior part, wherein each interior part is provided with a recess for receiving the shaft, wherein the recess is larger than the shaft in the pressing direction for allowing movement of the disc with respect to said shaft in the pressing direction, wherein the pressure roll includes for each disc one or more actuators for individually moving the disc, wherein one actuator is arranged for moving the respective disc with respect to the shaft in the pressing direction and the same or another actuator is arranged for moving the respective disc with respect to the shaft in a retraction direction opposite to the pressing direction.

In a process for building tires for vehicle wheels, a carcass sleeve is arranged on a shaping drum including two half-drums and two supports. Each support is operatively associated with one of the half-drums and carries a plurality of turning-up levers having free ends positioned close to the respective half-drum. Two annular anchoring structures are disposed around the carcass sleeve and each of the two supports is locked to the respective half-drum by interposing only stiff mechanical elements in mutual contact between the support and the half-drum. The carcass sleeve is shaped in a toroidal conformation, by setting a threaded shaft in rotation and moving the half-drums dose to each other. Subsequently, each of the two supports is unlocked from the respective half-drum and the threaded shaft is set in rotation to move each support close to the respective half-drum and lift up the free ends of the turning-up levers until the end flaps of the carcass sleeve are turned up around the annular anchoring structures.

Various embodiments relate to a pivoted dual roller tire sidewall and body ply stitching apparatus for stitching tire components, the apparatus including a first roller having a toroidal shape and connected to a first supporting arm, a second roller having a toroidal shape and connected to a second supporting arm and a supporting member connected to the first roller, the second roller and a third supporting arm wherein the second supporting arm is longer than the first supporting arm and the first roller and the second roller are configured to pivot on the supporting member.

A tire forming apparatus including: a drum spindle body; a plurality of arms arranged in annular shape on an outer circumferential side of the drum spindle body; and pushing means configured to push the arms in a direction approaching an unvulcanized tire member, along an extending direction of the drum spindle body, wherein each arm includes: a slidable contact portion provided on one end side of the arm and configured to slidably contact the pushing means; a press portion provided on the other end side of the arm and configured to contact the unvulcanized tire member and press the unvulcanized tire member; and a connecting portion provided between the slidable contact portion and the press portion in the arm extending direction and connected to the drum spindle body, on the drum spindle body side with respect to a line segment connecting the slidable contact portion and the press portion.

Disclosed is a pressure roll and a method for pressing a tire layer on a tire building drum in a pressing direction, wherein the pressure roll includes a shaft and a plurality of discs, wherein each disc has an interior part and an exterior part, wherein each interior part is provided with a recess for receiving the shaft, wherein the recess is larger than the shaft in the pressing direction for allowing movement of the disc with respect to said shaft in the pressing direction, wherein the pressure roll includes for each disc one or more actuators for individually moving the disc, wherein one actuator is arranged for moving the respective disc with respect to the shaft in the pressing direction and the same or another actuator is arranged for moving the respective disc with respect to the shaft in a retraction direction opposite to the pressing direction.

In a process for building tyres for vehicle wheels, a carcass sleeve is arranged on a shaping drum including two half-drums and two supports. Each support is operatively associated with one of the half-drums and carries a plurality of turning-up levers having free ends positioned close to the respective half-drum. Two annular anchoring structures are disposed around the carcass sleeve and each of the two supports is locked to the respective half-drum by interposing only stiff mechanical elements in mutual contact between the support and the half-drum. The carcass sleeve is shaped in a toroidal conformation, by setting a threaded shaft in rotation and moving the half-drums close to each other. Subsequently, each of the two supports is unlocked from the respective half-drum and the threaded shaft is set in rotation to move each support close to the respective half-drum and lift up the free ends of the turning-up levers until the end flaps of the carcass sleeve are turned up around the annular anchoring structures.

A method for manufacturing a tire, the method includes arranging bead members onto a molding drum on axially both end sides thereof such that outer surfaces of bead reinforcing rubber components of the bead members have bent faces each having an inverse V-shaped manner protruding radially outwardly, winding a non-turn-up carcass ply on the molding drum such that axially both end portions of the non-turn-up carcass ply cover the respective bent faces, joining the axially both end portions of the non-turn-up carcass ply wound on the molding drum to the respective bent faces. The joining includes a first step for reforming each end portion of the non-turn-up carcass ply in an inverse V-shaped manner so as to be along a respective one of the bent faces, and a second step for pressing reformed end portions of the non-turn-up carcass ply onto the respective bent faces using respective press rollers.

Disclosed is a tire building drum having tire components thereon, wherein the tire building drum is provided with a turn-up mechanism for turning-up parts of the tire components, wherein the turn-up mechanism includes a group of arms, wherein each group of arms includes primary arms and secondary arms interposed between the primary arms, wherein, the primary arms and the secondary arms are provided with primary pressing elements and secondary pressing elements, respectively, for exerting a pressing force onto the tire components during the turning-up, wherein the primary pressing elements are in a leading position, wherein the secondary arms are provided with actuators which are arranged for displacing the secondary pressing elements from an axially trailing position with respect to the axial position of the primary pressing elements in the leading position towards the same axial position as the primary pressing elements in the leading position.

The folding-up system is intended to fold an end portion of a cylindrical wall of a tire carcass assembly around a reinforcing bead core. The system comprises a drive device that is arranged to cause the carcass assembly to revolve intermittently about its roll axis, by successive angular increments, together with a folding device to cause pressure rollers to tilt. After each angular increment in roll, about a pitch axis perpendicular to the roll axis, in order to fold each portion of the end section located in an angular working sector occupied by a pressure roller towards the radially inner face of the wall, around the reinforcing bead core. Finally, the drive device includes a selector for placing the pressure rollers in a withdrawn position to disengage the trajectory followed by the wall of the carcass assembly during its roll rotation.

Each of a plurality of pressure rolls is displaced around the shaft member and pressurizes the tire constituent member. Each of a plurality of supporting parts supports the pressure roll rotatably from the inside of the pressure roll and is displaced integrally with the pressure roll. A plurality of pressure holes are formed in a plurality of points of the shaft member corresponding to positions of the plurality of pressure rolls so as to extend in the pressurization direction for the tire constituent member. Each of a plurality of moving members projects in the pressurization direction from the pressure hole so as to pressurize the pressure roll. Each of a plurality of supply pipes is arranged in the inside space around the shaft member so as to each supply the pressurizing medium for pressurizing the moving member into the pressure hole.