Patent ID: 7152649
Filing Date: 2006-12-26
Classification: B29D

Abstract:
1. A tyre-assembling apparatus, comprising: an assembling drum comprising first and second halves axially opposed along a geometric axis of the drum, each of the halves comprising a plurality of circumferentially-distributed radial sectors; radial-movement devices associated with each of the halves to selectively translate corresponding radial sectors between a contracted condition, wherein the radial sectors are disposed closer to the geometric axis of the drum, and an expanded condition, wherein the radial sectors are disposed spaced apart from the geometric axis of the drum; and at least one axial-movement actuator to translate the halves relative to each other between an approaching condition, wherein the halves are close to each other, and a spaced-apart condition, wherein the halves are spaced apart from each other along the geometric axis of the drum; wherein each of the radial sectors comprises: a holding member, defining an engagement seat of an annular anchoring structure to a bead-part of a carcass sleeve fitted on the drum; wherein the holding member comprises an axially-inner portion and an axially-outer portion, movable selectively and independently of each other under action of the radial-movement devices; a supporting member linked, relative to the holding member, in a position axially-internal to the holding member and movable between a first operating condition, wherein the supporting member is axially-spaced-apart from the holding member to provide a supporting seat to at least one ply that is part of the carcass sleeve, and a second operating condition, wherein the supporting member is disposed axially close to the holding member to enable mutual approaching of the halves; wherein the supporting members associated with the first and second halves, respectively, have abutment surfaces facing each other that are spaced apart from each other by an amount smaller than a stroke carried out by the halves between the spaced-apart condition and the approaching condition, and wherein the supporting members abut against each other by respective abutment surfaces in the approaching condition; a supporting hub coaxial with the geometric axis of the drum; a first guide element for slidably engaging the axially-inner portions of the holding member with the supporting hub, in a direction radial to the geometrical axis of the drum; at least one first radial-movement actuator operatively engaged with the supporting hub and axially movable relative thereto; first transmission connecting rods operatively engaged between the at least one first radial-movement actuator and one of the axially-inner portions to cause a radial movement of the axially-inner portion following an axial movement transmitted by the at least one first radial-movement actuator; a second guide element for slidably engaging the axially-outer portion of the holding member with the supporting hub, in a direction radial to the geometric axis of the drum; at least one second radial-movement actuator operatively engaged with the supporting hub and axially movable relative thereto; and second transmission connecting rods operatively engaged between the at least one second radial-movement actuator and one of the axially-outer portions to cause a radial movement of the axially-outer portion following an axial movement transmitted by the at least one second radial-movement actuator.