Patent ID: 7524175
Filing Date: 2009-04-28
Classification: B29C,B29D,B29L,Y10S

Abstract:
1. A mold for vulcanizing a tire, the mold comprising a plurality of tread segments for forming the tread on a green tire at a tread mold contour line, wherein the tread segments can be assembled side by side circumferentially about the green tire, each of said tread segments further comprised of an outer cavity plate having an interior surface and an exterior surface, said cavity plate having a plurality of channels on said interior surface and each of said channels having a vent hole extending from the channel to the exterior surface of the outer cavity plate; each of said channels having a rib mounted thereover, the adjoining surface of said rib is mating with the interior surface of the cavity plate at a location radially inward of the tread mold contour line, wherein the adjoining surface is located about the perimeter of said rib and wherein one of the rib adjoining surface and the cavity plate interior surface has a roughened surface relative to the other surface, forming a vent passageway with the channels and vent holes of the cavity plate for venting mold gasses from the interior of the mold to the exterior of the mold.