PROCESS AND APPARATUS FOR BUILDING TYRES

摘要

A carcass ply (3) is applied around an outer surface (14) of a - building drum (10), according to an application diameter (Dl) larger than the fitting diameter (DO) of the tyre (2). Coaxially engaged around each of the end flaps (3a) is an annular anchoring structure (5) defining the fitting diameter (DO). A pair of sidewalls (9) are manufactured by laying of a continuous elongated element in the form of approached coils on the carcass sleeve (21). An outer sleeve (27) comprising at least one belt structure (7) possibly associated with a tread band (8) is coaxially centred around the carcass sleeve (21). Through axial approaching of two halves (10a) forming the building drum (10), the carcass sleeve (21) is shaped into a toroidal configuration to determine application of same against a radially internal surface of the outer sleeve (27).