Patent ID: 9701083
Date: 2017-07-11
CPC Classifications: B29D

Claim:
1. A process for manufacturing a tyre for vehicle wheels, comprising building, on a forming support extending about a longitudinal axis, a carcass structure comprising at least one carcass ply and, at at least one end edge of the carcass ply, at least one annular anchoring structure comprising at least one substantially circumferential annular insert and at least one filling insert associated with said at least one substantially circumferential annular insert in a radially outer position thereof, wherein building the carcass structure comprises: laying said at least one carcass ply on the forming support; bringing the annular anchoring structure in contact position with the end edge of the carcass ply by at least one positioning device comprising a plurality of positioning members mounted on a first annular element which is slidable along a direction parallel to said longitudinal axis; turning up the end edge of the carcass ply about the annular anchoring structure by at least one turning up device, so as to form a turned up end portion of the carcass ply, said turned up end portion comprising the annular anchoring structure, said at least one turning up device comprising a plurality of turning up members mounted on a second annular element which is slidable along said direction parallel to said longitudinal axis, the second annular element being arranged in an axially outer position with respect to the first annular element; and folding down the filling insert on the carcass ply using a plurality of rollers mounted on the at least one positioning device, wherein a first part of turning up the end edge of the carcass ply is carried out while the at least one positioning device retains the annular anchoring structure in contact position with the end edge of the carcass ply, wherein, before the annular anchoring structure is placed in contact position with the end edge of the carcass ply, the end edge of the carcass ply is folded down toward the longitudinal axis of the forming support by at least one ply folding down device mounted on a third annular element which is slidable along a direction parallel to said longitudinal axis and axially interposed between said first annular element and said second annular element, and wherein the second annular element is mounted on three longitudinal screws arranged at 120° with respect to each other and passing through the first annular element, and a pair of pneumatic cylinders are provided between the first annular element and the third annular element to control relative axial sliding of the first annular element with respect to the third annular element.