Patent ID: 6224808
Filing Date: 2001-05-01
Classification: B29C,B29D,B29L,Y10S

Abstract:
A method of manufacturing a pneumatic tire of vulcanizable rubber comprising a phase of assembling a raw blank, a molding phase, and a vulcanizing phase, the method comprising:assembling a raw blank on a rigid core formed essentially by a fluidizable solid pulverulent material enclosed in a closed space defined by a membrane having an outer surface on which the raw blank is assembled, said fluidizable pulverulent material being made rigid by creating a vacuum in said closed space;molding the tire by closing around the core supporting the blank a mold having a mold surface, the mold comprising other rigid parts which cooperate with the core in order to define the final geometry of the tire and to define a molding volume which corresponds substantially to the volume of the raw blank so as to imprison the blank and the mold surface for molding the tire and vulcanizing the molded tire with regulated pressure by, after molding the blank, again making said fluidizable pulverulent material fluid by eliminating the vacuum and subjecting said closed space to the action of said regulated pressure.