Method for pressure bonding of a breaker-tread assembly with a carcass assembly by means of stitching in the manufacture of green tyres and device for accomplishment of such method

A device for joining a belt-tread assembly with a carcass assembly by stitching in tyre production, characterized in that it comprises:

• a rigid bearing part (3)
• at least two rotationally attached stitching rollers (2), each of them being independently, inelastically and axially movably attached to the rigid bearing part (3), which is provided with
• means for axial mutually symmetrical movement of the stitching rollers (2), wherein the means are formed by at least one slide (62), arranged in parallel with a rod (63), which is provided symmetrically from its centre with threadings of opposite pitch sense and is joined with one end of supports (8), which is adapted for symmetrical movement of supports (8) along the rod (63), controlled by a servomotor (61) for axial mutually symmetrical movement of the stitching rollers (2), which are rotationally attached at other ends of supports (8), wherein the stitching rollers (2) have an axis parallel to a rotation axis A of the tyre being produced, and
• inelastic means for moving the rigid bearing part (3) in a direction perpendicular to the rotation axis A of a tyre being produced for bringing the rigid bearing part (3) to a predetermined position and to control compressive force of the rollers on the green tyre being produced, the means being formed by at least one slide (42) parallel to a threaded rod (43), which is connected with a servomotor (41), wherein the threaded rod (43) together with the at least one slide (42) is arranged perpendicularly to the rod (63) provided symmetrically from its centre by threadings of opposing pitch with the proviso that the compressive force of the rollers is not induced by pneumatic cylinders.