Process and apparatus for building a green tire

摘要

PCT No. PCT/JP90/01429 Sec. 371 Date Aug. 28, 1992 Sec. 102(e) Date Aug. 28, 1992 PCT Filed Nov. 2, 1990 PCT Pub. No. WO92/07709 PCT Pub. Date May 14, 1992.A process and apparatus for building a green tire. The process includes mounting a carcass, in the form of a cylinder, around a green tire building machine having left and right shoulder formers with radially expandable bead locking mechanisms. The left and the right shoulder formers are each moved together into an idle movable state where the shoulder formers are allowed to move freely in an axial direction either closer or farther from each other. The bead locking mechanisms are radially expanded so as to lock the beads in a set position on the outer circumferential surface of the carcass outside the respective bead locking mechanism. Once the beads are locked, each of the shoulder formers are placed in a driven movable state for driving the respective shoulder formers toward each other thereby narrowing the distance between the beads so as to shape the carcass into a toroidal form.