Process for the manufacture of tread mould

Details Process for the manufacture of tread mould Process for the manufacture of tread mould

B - Operations, Transporting

29

D

B29D 30/66 (2006.01) B29D 30/06 (2006.01) B60C 11/00 (2006.01) B60C 11/13 (2006.01) B29C 33/30 (2006.01)

Patent

CA 2226704

The mould (1) for moulding a band of gum comprises a first and a second die (2, 3) each of which is provided with a moulding surface delimiting a moulding volume equal to the volume of the band of gum when the mould is in the closed position; an element moulding a cut-out traversing the entire thickness of the band is formed by bringing into contact a first moulding element (6) linked to the first die (2) with at least one second moulding element (7) linked to the second die (3). The invention concerns also a process for the manufacture of a tire tread, the said tread comprising at least one cut-out traversing the said tread and the said cut-out being provided with at least one gum link passage intended to prevent the opening and closing of the said cut-out.

Le moule (1) pour mouler une bande de gomme comporte une première et une deuxième matrice (2, 3) pourvue chacune d'une surface de moulage délimitant un volume de moulage égal au volume de la bande de gomme lorsque le moule est en position fermée; un élément moulant une découpure traversant toute l'épaisseur de la bande est formé par la mise en contact d'un premier élément moulant (6) lié à la première matrice (2) avec au moins un deuxième élément moulant (7) lié à la deuxième matrice (3). L'invention concerne également un procédé de fabrication d'une bande de roulement d'un pneumatique, ladite bande comportant au moins une découpure traversant ladite bande et ladite découpure étant pourvue d'au moins un pont de liaison en gomme destiné à empêcher l'ouverture et la fermeture de ladite découpure.

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