Production of a cylindrical coded element comprises molding an annular rubber element, placing on the pot section of a lower metal mold, pressing the rubber element to fill a cavity, cutting away the molded sections, and magnetizing

摘要

Production of a cylindrical coded element made from a rubber material containing a mixed ferromagnetic powder comprises molding an annular rubber element, placing on the pot section (22) of a lower metal mold (2b), pressing the rubber element to fill a cavity (21b), cutting away the molded sections on the end sides of the cylindrical product formed, and magnetizing the product to form north and south poles along the periphery surface of the product.