Patent ID: 6820336
Filing Date: 2004-11-23
Classification: B22F,D21G,F28F,Y10T

Abstract:
A method of making a roll end for a roll in a paper or board machine or in a finishing machine, the roll end comprising an axle journal with an end flange, as well as a duct system situated inside the material of the roll end, the method comprising making the roll end by a powder metallurgy process in a mold such that the duct system has portions within the end flange of the roll end, the duct system end flange portions being formed in connection with the stage of making the roll end by the powder metallurgy process;wherein the duct system is formed of a pipe system positioned within the mold prior to filling the mold with a metal powder and applying pressure, and wherein the pipe system is coated outside with a heat insulating coating layer before the pipe system is disposed in the mold.