PRODUCTION OF ENDLESS BELT, AND IMAGE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a method for producing an endless belt excellent in variety by which the life of a photoreceptor is prolonged and in which the cost is reduced and the number of stages is made small by performing the extrusion- molding of a material for molding so that an extrusion-molding ratio may be within a specified range by making gas blow into cylindrical welded substance. SOLUTION: The material for molding is melted and kneaded in an extrusion machine 100, becomes a molten body and gets in an extrusion die 140. A gas introducing path 150 is disposed in the die 140 and the gas is blown into the die 140 through the path 150, so that the tubular molten body passing through the die 140 is extended and expanded in the radial direction. The expanded molding body is cooled by a cooling ring 160 and drawn up in an upward direction, and passes between size stabilizing guides 170. At such a time, the producing method for the endless belt having high durability and excellent in the variety by performing the extrusion-molding so that the extrusion molding ratio may be 1.05 to 2.80 is obtained.