Method and plant for building tyres
First Claim
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 and spaced from the forming drum;
after positioning said carcass sleeve, introducing an operative fluid inside of the carcass sleeve;
based on the introducing, toroidally shaping said carcass sleeve while said forming drum is positioned inside, and spaced from, the carcass sleeve;
after positioning said carcass sleeve, expanding said forming drum up to a second radially expanded operative condition while spaced from the carcass sleeve;
contacting the carcass sleeve to an external surface of the forming drum in said second radially expanded operative condition, wherein the external surface of the forming drum remains spaced from the carcass sleeve during the expanding of the forming drum, at least until the second radially expanded operative condition is reached; and
arranging said forming drum, while expanded in said radially expanded operative condition and 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.
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Accused Products
Abstract
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.
23 Citations
20 Claims
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1. A process for building tyres comprising:
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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 and spaced from the forming drum; after positioning said carcass sleeve, introducing an operative fluid inside of the carcass sleeve; based on the introducing, toroidally shaping said carcass sleeve while said forming drum is positioned inside, and spaced from, the carcass sleeve; after positioning said carcass sleeve, expanding said forming drum up to a second radially expanded operative condition while spaced from the carcass sleeve; contacting the carcass sleeve to an external surface of the forming drum in said second radially expanded operative condition, wherein the external surface of the forming drum remains spaced from the carcass sleeve during the expanding of the forming drum, at least until the second radially expanded operative condition is reached; and arranging said forming drum, while expanded in said radially expanded operative condition and 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification