Venting unit (6) for a vulcanizing mould of a pneumatic vehicle tyre, with a mould inner side (1a), a housing (10), which can be pressed into a bore in the vulcanizing mould, and a valve insert, which is positioned in the housing and is movable with respect to the latter under spring force and which has a valve stem (8) and a valve head (9), which has an upper side (11) facing the green tyre to be vulcanized, wherein the valve head comes into contact with the surface of the green tyre during the forming process of the green tyre and has a planar base area (12) on the inner side of the mould. The upper side (11) of the valve head has a surface-covering, uneven crest-and-trough structure (13) with an area-related average roughness Sa in accordance with DIN EN ISO 25178 of 0.20 mm to 0.60 mm and a maximum height difference Sz in accordance with DIN EN ISO 25178 of 0.20 mm to 2.25 mm, wherein the deepest points of the trough structures are at or above the level of the base area.
ENTLÜFTUNGSEINHEIT, VULKANISATIONSFORM FÜR EINEN FAHRZEUGLUFTREIFEN UND FAHRZEUGLUFTREIFEN
VENTING UNIT, VULCANIZING MOULD FOR A PNEUMATIC VEHICLE TYRE AND PNEUMATIC VEHICLE TYRE
UNITÉ DE VENTILATION, MOULE DE VULCANISATION POUR UN PNEUMATIQUE DE VÉHICULE ET PNEUMATIQUE DE VÉHICULE
2024-08-21
Patent
Electronic Resource
German
ENTLÜFTUNGSEINHEIT, VULKANISATIONSFORM FÜR EINEN FAHRZEUGLUFTREIFEN UND FAHRZEUGLUFTREIFEN
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