RUBBER-COATED STEEL CORD, RUBBER RIBBON AND TIRE USING THE SAME, AND METHOD FOR PRODUCING THEM

摘要

PROBLEM TO BE SOLVED: To obtain a rubber-coated steel cord by surely filling unvulcanized rubber by a simple treatment in the gaps at stranded parts of a plurality of wires to surely bond the unvulcanized rubber to the wires. SOLUTION: The rubber-coated steel cord is obtained by the following practice: A plurality of wires 12 are fed from the revolving barrel 24 of a tubular-type strander 21 and passed through an atmosphere filled with the unvulcanized rubber under pressure inside an extruder 50, and stranded at specified pitches through synchronizing the advancing speed of the wires 12 with the revolving speed of the barrel 24, thereby filling the unvulcanized rubber in the stranded parts of the plurality of wires 12. The steel cords 10 thus produced are fed together with a plurality of other wires 12 to a rubber ribbon production machine 80 where the rubber ribbons 100 are produced. The rubber ribbons 100 thus produced are directly and continuously brought into a tire production system. COPYRIGHT: (C)2005,JPO&NCIPI