Stitching apparatus for tire drum building machines

Abstract

Abstract The invention comprises stitching apparatus for tire building machines provided with a building drum which apparatus comprises a horizontal base; two carriages which can be moved along said base in a direction parallel to the longitudinal axis of the building drum by a first actuator means having reversible working sense and in the direction perpendicular to said axis by a second actuator means having reversible direction; two vertical columns each of which is integral at one end with one of said carriages and is connected at the other end to at least one stitching disc, the axis of rotation of the stitching disc lying in a plane containing the axis of rotation of the building drum; means for driving the axis of rotation of each stitching disc toward one of two angularly spaced extreme positions; and elastic means for elastically rotating in said plane the axis of rotation of each stitching disc; said apparatus additionally comprising means for changing the speed and direction of movement of said carriages, including an embodiment wherein their movements are mutually dependent; and embodiments wherein the extreme positions of the axis of rotation of each stitching disc are spaced apart at angles greater than about 180 degrees and smaller than about 360 degrees; embodiments wherein the elastic means are able to selectively rotate the axis of rotation of each stitching disc; and embodiments including programmer control means for controlling the actuators and elastic means so that their operations take place in a pre-established sequence.

Inventors

• 👤 B Colombani
• 👤 A Pacciarini

Bibliographic Details