Tire building drum with a bladder or sleeve

A tire building drum with a first turn-up bladder, wherein the tire building drum comprises a drum body that is rotatable about a central axis extending in an axial direction, wherein the tire building drum comprises a center section for shaping a carcass and a turn-up section for turning-up one or more tire components against the shaped carcass at the center section, wherein the first turn-up bladder has a first circumferential edge a second circumferential edge opposite to the first circumferential edge in the axial direction, and an inflatable bladder body extending between the first circumferential edge and the second circumferential edge, wherein the bladder body, when uninflated, folds onto itself about a fold line at a side of the first circumferential edge opposite to the second circumferential edge in the axial direction, wherein the first circumferential edge and the second circumferential edge extend in a circumferential direction about the central axis around the drum body, wherein the tire building drum comprises a first release member and a first actuator for generating a relative movement between said first release member and the drum body to move said 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 to the drum body into a first release position in which the first release member releases the first circumferential edge from the drum body, wherein the first release member is located in the axial direction between the second circumferential edge and the fold line of the uninflated bladder body and covered by said uninflated bladder body in a radial direction perpendicular to the central axis.