Vulcanizing mold for pneumatic vehicle tires

A vulcanizing mold for pneumatic vehicle tires, which includes in combination:

• a first mold ring, a second mold ring arranged opposite said first mold ring, said mold rings being operable to receive therebetween a raw tire to be molded and to mold the side walls thereof, said first and second mold rings being selectively movable relative toward and away from each other, a first and a second rigid pressure ring respectively slidably surrounding said first and second mold rings and being guidingly engaged thereby, a first set of segments associated with and engageable by first pressure ring and distributed over the circumference of said first mold ring, a second set of segments associated with and engageable by said second pressure ring and distributed over said second mold ring, power operable means respectively associated with said first and second mold rings and operable through the intervention of said pressure rings to move said sets of segments toward each other in the axial direction of said pressure rings, and combined holding and guiding ring means respectively surrounding said first and second sets of segments and movable toward each other for simultaneously guiding the respective pertaining segments in common in the axial direction of said pressure ring means and in a direction transverse to the axial direction of said pressure ring means for molding the tread surface of a raw tire to be molded in said mold.