Method of manufacturing a self-supporting tyre and devices for manufacturing such a tyre

摘要

The process for making a self-supporting toroidal hoop comprises arranging a stack of cylindrical layers comprising a layer having an outer reinforcement sheet and a layer having a portion of a rubber mass for internal sealing, and placing the cylindrical stack layers on outline of the hoop. The outer reinforcement sheet is composed of coated textile or metallic coats in a rubbery mixture. The rubber mass is arranged between the reinforcement sheet and an internal volume of the hoop. An inner part of the outline of the hoop is corresponding to the stacking of the rubber mass. The process for making a self-supporting toroidal hoop comprises arranging a stack of cylindrical layers comprising a layer having an outer reinforcement sheet and a layer having a portion of a rubber mass for internal sealing, and placing the cylindrical stack layers on outline of the hoop. The outer reinforcement sheet is composed of coated textile or metallic coats in a rubbery mixture. The rubber mass is arranged between the reinforcement sheet and an internal volume of the hoop. An inner part of the outline of the hoop is corresponding to the stacking of the reinforcement rubber mass, and not covered by rubber for internal sealing thus remaining in contact with internal air. Rest of the rubber mass is molded by winding a continuous rubber coil or by extrusion. The rubber cord is first placed in a medium for molding the rest of the rubber mass, and then placed directly on an exposed part of the inner outline of the hoop. An independent claim is included for a device for making a self-supporting toroidal hoop.