APPLYING TREAD MATERIAL TO TYRES

摘要

C A N A D A "APPARATUS FOR APPLYING UNDERTREAD TO HEAVY DUTY LUGGED TREAD TIRES" . Uncured undertread material is extruded onto peripheral surfaces of a heavy duty tire carcass in preparation for application of lugs thereto through the use of apparatus including an extruder, a tire stand for rotatably supporting a tire carcass in spaced relation from the extruder, and a die mounted on the extruder for engagement with peripheral surfaces of a tire carcass supported by the tire stand. The die directs expelled undertread material from the extruder directly onto peripheral surfaces of a rotating tire carcass and co-operates with an engaged tire carcass in defining bank areas for temporarily accumulating expelled undertread material and for maintaining during formation of the undertread layer a bank of undertread material from which carcass non-uniformities are filled.