Disclosed is a tire building drum with a first bladder or sleeve, wherein the tire building drum has a first release member and a first actuator for generating a relative movement between the first release member and the drum body to move the first release member in a first release direction with respect to the drum body from a first fixation position in which the first release member fixates the first circumferential edge of the first bladder or sleeve to the drum body into a first release position in which the first release member releases the first circumferential edge from the drum body. Also disclosed is a method for operating the aforementioned tire building drum.

A method for making a vehicle tire in which a tire carcass is expanded radially on a shaping drum, wherein the sidewalls arranged on the tire carcass are turned up by inflatable shaping bladders. This involves moving two pusher bells, which are arranged to the sides of the tire carcass, in the direction of the center of the blank, wherein the pusher bells are respectively mounted on a movable first and second carriage and are respectively moved in the axial direction by a first and second drive by way of a coupling, wherein the pusher bells are pressed laterally against the shaping bladders. When disequilibrium of forces on the two sides of the shaping bladders is set, the pressing positions of the two pusher bells are balanced, the two drives being arranged on a freely mounted third carriage.

Disclosed is a tire building drum with a first bladder or sleeve, wherein the tire building drum has a first release member and a first actuator for generating a relative movement between the first release member and the drum body to move the first release member in a first release direction with respect to the drum body from a first fixation position in which the first release member fixates the first circumferential edge of the first bladder or sleeve to the drum body into a first release position in which the first release member releases the first circumferential edge from the drum body. Also disclosed is a method for operating the aforementioned tire building drum.

Disclosed is a tire building drum with a turn-up device and a turn-up method, wherein the tire building drum is rotatable about a central axis and includes a first drum half, a second drum half and a center section that is located in the axial direction between the first drum half and the second drum half, wherein the turn-up device includes a first turn-up bladder extending in a circumferential direction around the first drum half, wherein the turn-up device further includes a plurality of first pressing arms pivotable with respect to the first drum half between a rest position and a pressing position, wherein the plurality of first pressing arms in the rest position is arranged to lie at least partially between the uninflated first turn-up bladder and the first drum half in the radial direction.

To form a tire carcass, a body ply is wound about a drum, which has two half-drums movable axially in opposite directions to and from a center plane of the drum, and having respective turn-up bladders, on each of which is laid a respective annular lateral portion of the body ply; each annular lateral portion being turned up about a respective bead bundle and onto a sidewall of a toroidal-shaped annular central portion of the body ply by inflating the relative turn-up bladder and controlling distension of a given annular portion of the turn-up bladder so that, when inflation is completed, the annular portion assumes a given final position, in which an intermediate portion of the turn-up bladder rolls outwards along the relative sidewall of the annular central portion of the body ply.

The present invention relates to a roll over can drive apparatus of tire building machine supporting a bladder turning up a green tire semi-finished product on the molding drum when the bladders are expanded in the green tire molding process, and more specifically, to a roll over can of the tire building machine in which an operation cycle time and failure rate are reduced from a simplified structure. For this, the present invention discloses a roll over can drive device of a tire molding machine comprising: a bladder which supplies air to an interior of a various semi-finished products located on a forming drum and turns up the semi-finished products which located on a bead outside, and a roll over can which pushes the bladder to build a green tire, wherein the roll over can rotates on an axis of rotation of a supporting frame by a cylinder, and wherein the cylinder being connected to a support of the roll over can is mounted via a hinge axis to a top of the support frame.

A tire building drum and a method are provided for turning-up a tire component. The tire building drum comprises a drum body that is rotatable about a drum axis, an inflatable turn-up bladder extending in a circumferential direction about the drum axis around the drum body for turning-up a tire component supported on said turn-up bladder, and a plurality of pressing arms for pressing against the turn-up bladder during the turning-up of the tire component. The tire building drum further comprises a plurality of hinges for hingably connecting the pressing arms to the drum body. The plurality of hinges is located underneath the turn-up bladder when the turn-up bladder is uninflated. The tire building drum is further provided with an underlay extending between at least one hinge of the plurality of hinges and the turn-up bladder in a radial direction.