Process and apparatus for manufacturing tyres for vehicle wheels

摘要

Building the carcass structure of tires for vehicle wheels includes associating, at each end edge of a carcass ply, at least one respective annular reinforcement structure formed by depositing along a circumferential direction a plurality of reinforcement elements having a first length. Such elements are cut to size from a reinforced continuous band-like element fed to a cutting group arranged at a first operative position adapted to allow a barycentric grip of the reinforcement elements. The cutting group can translate along a feeding direction of the band-like element to a second operative position for cutting to size a plurality of second reinforcement elements having a second length different from the first length. The second operative position is defined on the basis of the second length, so as to have a barycentric grip of the second reinforcement elements too.

主权项

1. A process for manufacturing a tyre for vehicle wheels, comprising associating at least one reinforcement structure with at least one tyre component formed on a forming support, wherein associating said at least one reinforcement structure comprises:
feeding a reinforced continuous band-like element to a cutting group by moving said reinforced continuous band-like element along a feeding direction with a first advancing step, said cutting group being arranged along the feeding direction in a first operative position; cutting to size the reinforced continuous band-like element to form at least one first reinforcement element having a first cutting length; picking up said at least one first reinforcement element from the cutting group through a gripping member; depositing said at least one first reinforcement element on a respective deposition area defined on a respective component of a first tyre; translating the cutting group along the feeding direction from said first operative position to a second operative position; moving the reinforced continuous band-like element along the feeding direction with a second advancing step different from the first advancing step; cutting to size the reinforced continuous band-like element to form at least one second reinforcement element having at least one second cutting length different from said first cutting length; picking up said at least one second reinforcement element from the cutting group through said gripping member; and depositing said at least one second reinforcement element on a respective deposition area defined on a respective component of a second tyre, wherein said second operative position is far from said first operative position by a distance, an extension of which along the feeding direction is equal, in absolute value, to half a difference between said at least one second cutting length and said first cutting length; and wherein picking up said at least one reinforcement element and at least one second reinforcement element from the cutting group through said gripping member comprises:
positioning said gripping member at a barycentric position of said first reinforcement element and second reinforcement element;andholding the respective reinforcement element in said barycentric position.