Abstract: A method for production of tires in a curing mold make of a plurality of shaped blocks. The blocks are displaced circumferentially so as to leave a width clearance therebetween, the clearance being wide enough to permit air trapped within the mold to escape, but to prevent escape of elastomeric material and thus avoid generation of burrs on the surface of the tire.

Abstract: In a metallic mold, all or a part of the annular portion for molding at least the tread of the tire is formed by a plurality of small separate pieces that can be combined to form said annular portion. Between these small pieces, during the molding of the tire, clearances are maintained so as to permit the passage of air but not the passage of rubber. The above clearances are connected through vent holes to air suction means. Such vent holes are also connected with means for blowing pressure fluid through the clearances. The construction of this mold portion by means of small pieces made with cuts of the aforementioned portion in the axial and the circumferential direction permits regulation of the width of the clearances with respect to the rheometric characteristics of the elastomeric material to be molded and to adapt easily the mold to different tire sizes by increasing or decreasing the number of such pieces.