Method for positioning the slitters of a slitter-winder in a paper or board machine
AssigneeMetso Paper, Inc.
InventorsPauli Koutonen, Jari Paanasalo
Life of this patent
Estimating the term…
Abstract
The slitters of a slitter-winder in a paper or board machine are placed in position in slitting to slit component webs to the desired width. The slitters are moved to a new slitting position as a normal movement when the slitter-winder has stopped after slitting according to the preceding slitter setting. In positioning the slitters, at least one slitter not in use in the slitter-winder is moved before the normal movement as an advance movement to a new slitting position and/or to a waiting position for the next slitting position while the other slitters are slitting the web.
Claims12
A method for positioning slitters of a slitter-winder in a paper or board machine for slitting a web, comprising the steps of:
- from a first plurality of slitters, positioning a second plurality of slitters comprising less than all the first plurality of slitters of the slitter-winder, at first selected slitter settings, and slitting the web to form component webs of first desired widths;
- in an advance movement, moving at least one slitter of the first plurality of slitters which is not of the second plurality of slitters to a first new slitting position and/or to a waiting position for a future slitting position, while the second plurality of slitters are slitting the web to form component webs;
- stopping the slitter-winder;
- in a second normal movement, moving at least some of the second plurality of slitters to a new slitting position and moving the at least one slitter of the first plurality of slitters which is not of the second plurality of slitters from the waiting position to a second new slitting position or leaving the at least one slitter of the first plurality of slitters which is not of the second plurality of slitters in the first new slitting position;
- and
- slitting the web into component webs of second desired widths with the at least some of the second plurality of slitters and the at least one slitter of the first plurality of slitters which is not of the second plurality of slitters.
A method for positioning slitters of a slitter-winder in a paper or board machine for slitting a web, the slitter-winder being of the type having a plurality of slitters arrayed for movement in a cross machine direction, and the slitter-winder having one actuator for causing all cross machine direction motion of each of the slitters of the plurality of slitters, the method comprising the steps of:
- slitting a paper web to form component webs to first desired widths, with a first group of slitters of the plurality of slitters, which first group is less than all of the plurality of slitters, thus defining a second group of slitters of the plurality of slitters which is not in use;
- prepositioning by an advance movement at least one of the second group of slitters with the one actuator in an advance movement, to a first new slitting position and/or to a waiting position while the first group of slitters are slitting the web into component webs;
- stopping the slitter-winder;
- in a second normal movement, moving at least one of the first group of slitters with the one actuator to a new slitting position and moving with the one actuator the at least one slitter of the second group of slitters to a second new slitting position or leaving the at least one slitter of the second group of slitters in the first new slitting position;
- wherein the first new slitting position and/or the waiting position is selected so that the time to position all of a third group of slitters comprising said at least some of the first group of slitters and the at least one of the second group of slitters is reduced;
- and
- slitting the web into component webs of second desired widths with the third group of slitters.
Dependencies are inferred from the claim text.