VULCANIZING MOULD FOR TYRES AND METHOD FOR REMOVING GAS FROM THE SURFACE OF TYRE VULCANIZING MOULD

摘要

The invention relates to a tyre vulcanizing mould (1 ) having an inner tread surface (3) provided by ribs (4) emerging from the surface (3) and defining tread slots therebetween, and a sharp corner (6) is formed at the junction of the tread surface (3) and the rib (4), the mould (1 ) is provided by means for removing gas from the sharp corner (6) and the surface (3), and the means for removing gas from the sharp corner (6) comprises of an air pocket (7) machined into the lateral surface (8) of the rib (4), adjacent the corner (6). The method for removing gas from the surface of tyre vulcanizing mould comprises steps of machining said air pocket (7) into the lateral surface (8) of the rib (4), adjacent the corner (6), and diverting the gas accumulated during forcing the green tyre (2) tread (5) of a toward the surface (3) of the mould (1 ) into said air pocket (7).