METHOD AND PLANT FOR BUILDING TYRES

摘要

A carcass sleeve is situated in a radially external position with respect to a toroidal forming drum, arranged in a first radially contracted operative condition. The carcass sleeve is shaped according to a toroidal configuration while the forming drum is positioned inside the carcass sleeve. During shaping of the carcass sleeve, the forming drum is radially expanded up to a second radially expanded operative condition. Upon completed shaping, the carcass sleeve is coupled to the forming drum in the second operative condition. The forming drum, coupled to the shaped carcass sleeve, is arranged in proximity to at least one device for building at least one belt layer at a radially external position relative to the shaped carcass sleeve.

主权项

1. A process for building tyres comprising:
arranging a carcass sleeve comprising at least one carcass ply and a pair of anchoring annular structures; arranging a toroidal forming drum in a first radially contracted operative condition; positioning said carcass sleeve at a radially external position relative to said forming drum; toroidally shaping said carcass sleeve while said forming drum is positioned inside the carcass sleeve; expanding said forming drum up to a second radially expanded operative condition; coupling the toroidally shaped carcass sleeve to the forming drum in said second operative condition; arranging said forming. drum, coupled to said carcass sleeve, in proximity to at least one device for building at least one belt layer at a radially external position relative to said carcass sleeve.