Assembly drum for the manufacture of tires.

摘要

Building drum (1) radially expandable, for the manufacture of a tire, taking said drum body mounted on a central shaft (2) having a generally cylindrical central surface for receiving the products to be assembled and ends of diameters different, the drum comprising a lifting device (20, 21) at each end of the drum body, having a cylindrical outer surface (221, 231) for receiving the products to be assembled, characterized in that the device lifting (21) disposed near the smaller diameter end is radially displaceable relative to the body (10) of the drum (1) between a position in which its surface (231) has substantially the same diameter as the central surface of the body (10 ) and a position in which its surface (231) has a smaller diameter than the central surface of the body (10), the radial displacement of this being synchronized d ispositivo lift (21) with radial expansion of the drum (1).