Method for producing a profile segment of a segmented casting-vulcanizing mold for vehicle tires and a vulcanizing mold and a vehicle tire

A method of manufacturing a profile segment of a segmented casting-vulcanizing mold for vehicle tires, wherein the profile segment comprises a molding area that forms a segment of a tread profile of a tire to be vulcanized, which comprises:

• producing a rigid model segment comprising a casing-shaped tread surface, wherein the casing-shaped tread surface comprises a profile positive of the tread profile;
• coating the rigid model segment with a plasma coating;
• milling the profile positive of the tread into the casing-shaped tread surface of the rigid model segment to obtain a master model;
• producing a flexible imprint from the master model;
• producing a rigid casting made of plaster from the flexible imprint to form a casting core segment;
• and
• casting all casting core segments placed one against the other with an aluminum-magnesium alloy to obtain a vulcanizing mold which is in turn subsequently divided into individual profile segments,
• wherein the plasma coating provides a surface profile of 5-50 μm to a vulcanized tire produced by the segmented casting-vulcanizing mold comprising the profile segment.