Patent ID: 7172396

Claim:
Machine for curing green rubber in the production of tires for road vehicles and the like, comprising a mold with two circular pans or end plates and peripheral sectors defining the tread, and with bladder means for creating a pressure inside the tire, and with two opposed diametrically dilatable coaxial discoidal elements that are able to pass axially from the top into the tire when the tire is positioned in the mold, characterized in that: said two opposed discoidal elements are able to move independently of each other axially; said discoidal elements have sectors that can be moved radially forming horizontal contact surfaces for engaging from the inside the annular beads of the tire, when said discoidal elements are moved one from the other; that said sectors of said discoidal elements have moreover spring loaded vertical pegs for radially making contact with the inner edge of the annular beads of the tires and that are able to retract on contact with the circular pans or end plates of the mold when said discoidal elements approach the respective circular pans or end plates of the mold; means are provided for supplying a shaping gas at limited pressure into the tire while the two pans are being moved toward each other during mold closure; and means are provided for discharging at the appropriate time said shaping gas from inside the tire when said bladder means are expanded from inside the tire.