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AssigneeMichelin Recherche et Technique S.A.
InventorsJose Merino Lopez, Georges Peyron, Jean-Claude Kaczorwski, Georges Lavialle
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A molding element for equipping a mold for molding a rubber tread, composed of at least two molding parts provided with lateral walls and end walls joining the lateral walls, the lateral walls being intended to mold in the rubber tread main walls defining a cutout, the main walls being connected by at least one rubber connecting element. In the molding position, the molding parts of the molding element are arranged such that one wall of a molding part is in contact with at least one wall of another molding part, the geometries of the walls of the molding parts being functionally arranged to form at least one orifice permitting the passage of the rubber for molding a connecting element. At least one of the molding parts is mounted to be mobile relative to the molding part with which it defines at least one orifice, such that, under the action of the demolding forces, the mobile part is displaced relative to the other to create a passage sufficient to permit the molded connecting element(s) to pass and thus to permit demolding of the rubber tread in a single operation without breaking the connecting elements.
A molding element for equipping a part of a mold for molding a tread of a rubber mix for a tire, said mold part being displaced in a direction of molding/demolding XX′, said molding element intended to mold a cutout in the tread being provided with at least two molding parts intended to project on the molding surface of said mold, each molding part being provided with lateral walls and end walls limiting the lateral walls, said molding parts being functionally arranged between them to define, in the molding configuration, at least one orifice intended for molding a rubber connecting bridge between the walls of the cutout, the molding element being characterized in that at least one molding part of said molding element is mounted to be mobile at least in translation in the direction of demolding XX′ relative to the other molding parts so as to form, during the demolding, at least one passage of sufficient dimensions to permit the complete demolding of the molding element from the molded, vulcanized tread without breaking the connecting bridges.
Dependencies are inferred from the claim text.