Process for the manufacture and elastomeric components of a tire for vehicle wheels.

摘要

Method for manufacturing elastomeric components of a tire (3) for vehicle wheels, comprising the steps of: - feeding a continuous elongated element (20) from a feeding member (19) for application of said elongated element (20 ) on a building support (18) exerting a feeding pressure inside said delivery member (19); - providing the support (18) a rotary motion about a geometric rotation axis (XX) thereof, so that the elongated element (20) is circumferentially distributed on the support (18); - carrying out controlled relative displacements for transverse distribution between said support (18) and the feed element (19) to form a tire component (9, 12, 13, 14, 15, 16, 17) with said elongated element (20 ) which is defined by a plurality of coils (20a) placed in a design preestablished deposition depends on a cross-sectional profile predetermined to said component (9, 12, 13, 14, 15, 16, 17) occurs; wherein said feed member (19) comprises an extrusion screw (22), a gear pump (23) associated with said extrusion screw (22) of the latter and an outlet die (26) associated after that gear pump (23), said gear pump (23) a direction of rotation itself during said feeding step; - stopping said step of feeding said elongated element (20) when it has completed the formation of said component (9, 12, 13, 14, 15, 16, 17); - exerting counter pressure inside said delivery member (19) after said stopping step; characterized in that when said counter-pressure is exerted, said gear pump (23) performs a reverse rotation relative to said rotation direction during said feeding step.