A PROCESS FOR BUILDING TYRES FOR VEHICLE WHEELS, TYRE FOR VEHICLE WHEELS AND A METHOD FOR OPTIMIZING THE DISTRIBUTION OF LOADS IN THE CARCASS STRUCTURE OF A TYRE

摘要

In a tyre for vehicle wheels a carcass ply (3a, 3b) is obtained by depositing on a radially outer surface (15) with respect to a forming drum (13) a plurality of strip-like elements (14) in circumferential side by side relationship with each other, superimposing a lateral longitudinal portion (18) of a strip-like element (14) on the lateral longitudinal portion (18) of an adjacent strip-like element (14). A central part (17) of each of the strip-like elements (14) comprises a plurality of parallel first cords (15a) having a first average diameter (d1). The two lateral longitudinal portions (18) each having a reduced thickness (S2), with respect to a thickness (S1) of the central part (17), and having at least one second end cord (15b) with a second average diameter (d2) smaller than the first average diameter (d1).