Method of manufacturing a screen cylinder and a screen cylinder

摘要

The present invention relates to a method of manufacturing a screen cylinder, and a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp or fiber suspensions of the pulp and paper making industry, or other similar suspensions. The present invention relates more particularly to screening or filtering devices of the type comprising a plurality of screen wires (10) positioned at a small spacing parallel to each other, the screen wires (10) being fastened into notches in the support elements (20) by means of shrink fitting the screen wires (10) into the notches by heating the second rim area (26) of the support ring (20) after the screen wires (10) have been inserted into the notches.

主权项

1. A method of manufacturing a screen cylinder, said screen cylinder formed of at least a number of screen wires, wherein pairs of adjacent screen wires provide a screening slot therebetween, and substantially circular support rings, said support rings having a first rim area provided with notches into which said screen wires are installed, and a second rim area opposite to said first rim area, the method comprising:
a) after installing some of the screen wires into said notches of said support rings, evenly and uniformly heating the second rim area of at least one of said support rings such that a temperature of the first rim area remains lower than a temperature of the second rim area, and whereby the second rim area is deformed, and b) allowing at least one of said support rings to cool to decrease a diameter of the at least one of said support rings, whereby the first rim area is deformed and the screen wires are clamped in said notches.