Michelin Recherche Et Technique S.a.

Georges Lavialle

Jos&eacute; Merino Lopez

Jose Merino Lopez

Pascal Auxerre

Alain Lagnier

Georges Peyron

Pascal Falempin

Jean-Claude Kaczorwski

A mold for molding a tread, in particular of a tire, having first elements in relief and second elements in relief for cooperating in the molding configuration to form a molding element intended to mold a single cutout opening both on to the running surface of the tread and on to one of the lateral edges of said tread and to define at least one orifice intended to allow the rubber mix to pass during the molding of the tread.

Tread mold

A molding element has an anchoring portion and a molding portion, the anchoring portion being intended to be anchored in a part of a tire tread mold with the molding portion projecting from a molding face of the tire tread mold part. The molding portion of the molding element has at least two extensions, one of these extensions having at least one arm pivotally mounted on the extension. The molding element is characterized in that, in the molding position, at least one arm pivotally mounted on an extension bears on another extension of the same molding element to define at least one orifice passing through the molding element to mold a connecting bridge between opposite walls of a cutout molded by the molding element.

Molding element and mold for molding a cutout in a tread

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.

Molding element for tire

Growing community of inventors

Billom, France

Georges Lavialle