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AssigneeCompagnie Generale des Establissements Michelin-Michelin & Cie
InventorsGuy Pouille, Bernard Ravel
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An improved mold (1) for the molding and vulcanizing of annular treads inded, in particular, for the recapping of tires, which includes at least one rigid core (3) defining the inner surface of the tread and a collar (2) divided into sectors (21) which are movable radially between an open position and a closed position of the collar (2) for the molding of the outside of the tread, characterized by the fact that the core (3) bears movable annular elements (5) for the tight connection of the core (3) to the sectors (21) whatever the position of the latter between the closed position of the collar (2) and a slightly apart position of the sectors (21), and that the sectors (21), the core (3), and the annular element (5) define the molding space of the tread.
A mold for the molding and vulcanizing of annular treads, comprising at least one rigid core defining the inner surface of the tread, a collar divided into sectors which are movable radially between an open position and a closed position of said collar for molding of the outer surface of the tread, and axially movable connecting means on the core for providing a tight connection between said core and the sectors whatever the position of the sectors between said closed position of the collar and a slightly apart position of the sectors, the sectors, the core, and the connecting means defining the mold cavity for the tread.
A mold for molding and vulcanizing tire treads comprising a rigid core defining an inner surface of the tread, a collar divided into sectors which are movable between an open position and a closed position of said collar for the molding of the tread and at least one annular element mounted on the core for preventing leakage of rubber from the mold between the mold sectors and the core and having an outer molding surface, said annular element having a fixed peripheral edge which remains seated on the core and a peripheral edge which is movable between spaced apart inner and outer surfaces of the core and which in the closed position of the collar is moved by the sectors inwardly against the inner surface of the core and in a retracted position of the sectors is movable against the outer surface of the core, the annular element when engaged with either the inner or outer spaced apart surfaces preventing a leakage of rubber between the mold sectors and the core.
Dependencies are inferred from the claim text.