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1. (WO2014198651) MOULDING ELEMENT COMPRISING CUTTING MEANS FOR MOULDING AND VULCANIZING A TYRE TREAD AND METHOD OF MOULDING A TIRE TREAD USING THIS ELEMENT

Pub. No.:    WO/2014/198651    International Application No.:    PCT/EP2014/061798
Publication Date: Fri Dec 19 00:59:59 CET 2014 International Filing Date: Sat Jun 07 01:59:59 CEST 2014
IPC: B29D 30/06
Applicants: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
MICHELIN RECHERCHE ET TECHNIQUE S.A.
Inventors: KANEKO, Shuichi
Title: MOULDING ELEMENT COMPRISING CUTTING MEANS FOR MOULDING AND VULCANIZING A TYRE TREAD AND METHOD OF MOULDING A TIRE TREAD USING THIS ELEMENT
Abstract:
Moulding element of a mould for moulding and vulcanizing a tyre tread, this tread comprising a tread surface intended to come into contact with the ground when the said tyre is rolling, this moulding element (1) comprising a moulding surface (3) intended to mould part of the tyre tread surface and a blade (5) of length and of height H intended to mould a sipe or a groove in the tread, this blade comprising a rounded end extending along the length of the blade in a direction of extension X. The moulding element comprises two cutting means (7)able to cut a cover layer (12) already applied to a green form (10) of the tyre and positioned on either side of the blade (5) at a certain distance from this blade, and each cutting means (7) comprises a cutting edge (8) extending in the direction of extension, this cutting edge making an acute angle α in a sectional drawing perpendicular to this direction of extension X able to cut the cover layer(12), the distance D between this cutting edge and the moulding surface (3) being lower than the height H of the blade (5).