B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
B29D 30/32 (2006.01) B29D 30/24 (2006.01)
Patent
CA 2683084
To form a tyre carcass (2), a body ply (20) is wound about a drum (1), which has two half -drums (5) movable axially in opposite directions to and from a centre plane (4) of the drum (1), and having respective turn-up bladders (8; 34), on each of which is laid a respective annular lateral portion (23) of the body ply (20); each annular lateral portion (23) being turned up about a respective bead bundle (7) and onto a sidewall (24) of a toroidal -shaped annular central portion (22) of the body ply (20) by inflating the relative turn-up bladder (8; 34) and controlling distension of a given annular portion (12; 38) of the turn-up bladder (8; 34) so that, when inflation is completed, the annular portion (12; 38) assumes a given final position, in which an intermediate portion of the turn-up bladder (8; 34) rolls outwards along the relative sidewall (24) of the annular central portion (22) of the body ply (20).
L'invention concerne la formation d'une carcasse de pneu (2), qui consiste en ce qu'une nappe carcasse (20) est enroulée autour d'un cylindre (1), qui a deux demi-cylindres (5) pouvant se déplacer axialement en va-et-vient dans les directions opposées d'un plan central (4) du cylindre (1), et ayant des vessies rentrées (8; 34), sur chacune d'elles est posée une partie latérale annulaire (23) de la nappe carcasse (20); chaque partie latérale annulaire (23) étant rentrée autour d'une tringle de bourrelet de pneu (7) correspondante et sur une paroi latérale (24) d'une partie centrale annulaire de forme toroïdale (22) de la nappe carcasse (20) par gonflage de la vessie rentrée (8; 34) correspondante et régulation de la distension d'une partie annulaire donnée (12; 38) de la vessie rentrée (8; 34), ainsi, lorsque le gonflage est achevé, la partie annulaire (12; 38) adopte une position final donnée, dans laquelle une partie intermédiaire de la vessie rentrée (8; 34) roule à l'extérieur le long de la paroi correspondante (24) de la partie centrale annulaire (22) de la nappe carcasse (20).
Baldoni Viscardo
Marangoni Giorgio
Marangoni Meccanica S.p.a.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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