Compagnie Generale Des Etablissements Michelin

Pierre Chigros

Damien Bardin

The present invention relates to a set of mould elements comprising main blades and secondary blades, intended to be added to a mould for vulcanizing a tread of a tire, the mould elements being capable of moulding cuts in the tread, characterized in that a main blade comprises at least one assembly device for assembling a secondary blade, the assembly device comprising two series of at least one protrusion arranged facing one another. It is thus possible to ensure a relative positioning and an assembly that can withstand mechanical stresses over the entire height of the blade during moulding/demoulding, while minimizing the volume of material added. This assembly is barely visible on the tire.

Sipe blade assembly

A set () of moulding elements intended to be added to a mould comprise a main moulding element () and a secondary moulding element () comprising an edge (), said main moulding element () comprising a contact zone () adapted to be in contact with all or part of the edge () of the secondary element, said contact zone () not being flat, and the edge () of said secondary moulding element () comprising at least one recessed portion () complementary to the non-flat contact zone () of the main element.

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Clermont-Ferrand, France

Pierre Chigros