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 building machine and a method for stitching a tire component, wherein the tire building machine includes a tire building drum and a stitcher. The tire building drum includes bead-lock segments which are retractable into a recessed position relative to the rest of the tire building drum. The stitcher includes a disc-shaped stitching body having a first side for pressing on the tire component during stitching and a second side opposite to the first side. The second side is concave, and the stitcher is positionable relative to the tire building drum such that the concave second side fits at least partially over a transition between the bead-lock segments in the recessed position and the rest of the tire building drum.

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 process for manufacturing a tire for vehicle wheels, includes building, on a forming support extending about an axis, a carcass structure including at least one carcass ply and, at at least one end edge of the at least one carcass ply, at least one annular anchoring structure. Building the carcass structure includes laying the carcass ply on the forming support, bringing the annular anchoring structure in contact position with the end edge of the carcass ply and turning up the end edge about the annular anchoring structure so as to form a turned up end portion of the carcass ply including the annular anchoring structure. A first part of turning up the end edge of the carcass ply is carried out while at least one positioning device retains the annular anchoring structure in contact position with the end edge of the carcass ply.

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.

The present disclosure provides a tire building method and a mechanical drum. The tire building method includes: step S1: controlling an attaching mechanism to roll a bead filler to attach the bead filler to a tire carcass; step S2: while attaching the bead filler or during a process of attaching the bead filler, controlling a turn-up mechanism to roll a sidewall so as to attach the sidewall to the tire carcass. The tire building method according to the present disclosure solves problems of long time of building the tire and low efficiency of building the tire in the related art.

The present disclosure provides a tire building method and a mechanical drum. The tire building method includes: controlling an attaching mechanism to roll a bead filler to attach the bead filler on a carcass of the tire; while attaching the bead filler or during a process of attaching the bead filler, controlling a turn-up mechanism to support a sidewall of a tire; and after the bead filler is attached, controlling the turn-up mechanism to roll the sidewall of the tire. The tire building method according to the present disclosure solves problems of long time of building the tire and low efficiency of building the tire in the related art.

A roller turn-up mechanism including a plurality of first turn-up structures is provided. The first turn-up structure includes: a roller assembly configured to roll a sidewall of a tire; a first drive rod drivingly connected to a roller assembly, and a first drive assembly connected to the first drive rod to move the roller assembly in a radial direction of the tire through the first drive rod; a support assembly connected to the first drive rod to support the sidewall of an outer side of the roller turn-up mechanism; and a second drive assembly connected to the support assembly to drive the roller assembly to press the tire through the support assembly; a second driving rod connected to the second drive assembly and further rotationally connected to the first driving rod; a third driving rod.