EP1705287B1 - Method of closing an extended calendering nip and calendering arrangement - Google Patents
Method of closing an extended calendering nip and calendering arrangement Download PDFInfo
- Publication number
- EP1705287B1 EP1705287B1 EP20050110684 EP05110684A EP1705287B1 EP 1705287 B1 EP1705287 B1 EP 1705287B1 EP 20050110684 EP20050110684 EP 20050110684 EP 05110684 A EP05110684 A EP 05110684A EP 1705287 B1 EP1705287 B1 EP 1705287B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roll
- calendering
- shell
- nip
- pressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/002—Opening or closing mechanisms; Regulating the pressure
Definitions
- the invention relates to a method for closing an extended nip of a smoothing arrangement for smoothing a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same, which is formed between a smoothing roll and a counter-roll arranged thereunder. wherein the smoothing roll has a flexible roll shell, which is pressed by a pressing element to the counter roll.
- the invention further relates to a smoothing arrangement according to the preamble of claim 8.
- the flexible roll shell Because of the width of the smoothing roll, which can reach values of 10 m, the flexible roll shell has a slack when the nip is open due to its own weight. The sag is largest in the middle of the roll.
- the calendering nip After transferring the fibrous web, the calendering nip is closed with rotating smoothing and counter-rolling rolls.
- the center of the roll mantle first comes in contact with the mating roll, which can lead to an increased load on the center of the roll mantle and to a tearing off of the fibrous web.
- the object of the invention is therefore to reduce in particular the risk of tearing the fibrous web with the simplest possible means.
- the pressing surface extends largely straight in the axial direction, it is prevented in the adjacent roll shell that this sags. Thus, it is ensured when closing the smoothing nip that the roll shell over its entire length substantially simultaneously comes into contact with the counter roll.
- the speed of the roll mantle should coincide with the peripheral speed of the mating roll.
- the roll shell from uneven stress and the fibrous web are preserved from too high a load due to a differential speed between the roll shell and the counter roll, which only occurs in certain regions.
- the pressing element is pressed as a jacket clamping means before or during the closing of the nip in the direction of the backing roll, that the roll shell over its entire length rests against the pressing surface of the pressing element, the roll shell only after the counter-roll is brought into contact.
- the roll mantle is tensioned by means of jacket clamping means before or during the closing of the smoothing gap, preferably in the form of guide rails extending axially in the roll shell, which press the roll mantle radially outwards outside the press element the roll mantle bears against the pressing surface of the pressing element over its entire length, the roll mantle only then being brought into contact with the mating roll.
- the jacket clamping means acts radially counter to the pressing direction of the pressing element and thus raises the roll shell until it lies completely against the pressing surface of the pressing element.
- the jacket clamping means can also act obliquely with a direction of action, preferably on both sides and symmetrically to the press plane.
- the roll shell is pressed out of the circular shape with a component transverse to the pressing direction and thereby tensioned. As a result of this tensioning, the roll shell is attracted to the pressing element.
- the guide rails extend axially over the entire length of the roller and provide during operation for a cylindrical shape of the flexible roller shell.
- the roll shell during the closing of the calendering nip on the jacket suction means preferably in the form of the suction openings provided with the pressing element is sucked to the pressing surface of the pressing element.
- the suction openings must be connected only to a vacuum source.
- the lubricant is sucked out of the roll shell, which reduces the weight.
- the suction of the roll mantle can also be used as the sole means of achieving the inventive task.
- the air pressure in the roll shell is increased during the closing of the calendering nip, the air pressure being higher than during the operation of the smoothing roll.
- the smoothing and backing rolls may have a flexible roll shell which allows the formation of a flat extended nip.
- the counter-roller is cylindrical, which is why the pressing member has a concave pressing surface to form an elongated smoothing nip.
- the smoothing nip of the smoothing arrangement of a paper machine is formed by a smoothing roll 2 and a cylindrical counter-roll 3 arranged underneath.
- the smoothing roll 2 has a flexible roll shell 4 made of fiber-reinforced plastic, which is pressed to form a prolonged smoothing gap of a pressing member 5 with concave pressing surface to the counter roll 3.
- the extended nip Due to the extended residence time of the fibrous web 1 in the nip, the extended nip causes a significant improvement in the smoothing result while at the same time protecting it.
- the flexible roll shell 4 is supported from the inside over a plurality of axially extending guide strips 6.7. While a guide strip 6 is arranged on the opposite side of the pressing element 5, in each case a guide strip 7 is symmetrical to the pressing plane 9 in the two lower quadrants of the smoothing roller. 2
- the shaping is further assisted and counteracts sag that the air pressure in the roll shell 4 is increased during the closing of the calendering nip, wherein the air pressure is higher than during operation of the smoothing roll 2.
- the fibrous web 1 is only completely passed through the open nip before it is closed.
- the roll shell 4 is accelerated to the same speed as the counter roll 3, but also the roll shell 4 during the closing of the smoothing gap with the protruding parts of the concave Pressing surface of the pressing element 5 brought into contact.
- the roll shell 4 Since the pressing surface in the axial direction is largely straight, thus the roll shell 4 has in the region of the smoothing gap over its entire length substantially the same radial distance from the roll axis.
- the clamping of the roll shell 4 is characterized in that the pressing element 5 is pressed as a jacket clamping means before or during the closing of the smoothing gap in the direction of the backing roll 3, that the roll shell 4 is applied over its entire length partially against the pressing surface of the pressing element 5.
- the roll shell 4 is held by the guide rails 6, 7.
- these suction openings 8 which are connected to a vacuum source and so suck the roll shell 4 to the pressing member 5.
- Figure 2 shows an embodiment in which the roll shell 4 before or during the closing of the smoothing gap on jacket clamping means in the form of axially extending in the roll shell 4 guide strips 7, which press the roll shell 4 outside of the pressing member 5 radially outward, is so stretched in that the roll shell 4 partially bears against the pressing surface of the pressing element 5 over its entire axial length.
- the guide rails 7 in the two lower quadrants of the smoothing roller 2 act here obliquely, but symmetrically to the pressing plane 9 and press the roll shell 4 so transversely to the pressing plane 9 from its circular shape.
- the roll shell 4 is stabilized on the side opposite the pressing element 5 side by a guide bar 6.
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Description
Die Erfindung betrifft ein Verfahren zum Schließen eines verlängerten Glättspaltes einer Glättanordnung zur Glättung einer Papier-, Karton-, Tissue- oder einer anderen Faserstoffbahn in einer Maschine zur Herstellung und/oder Veredlung derselben, welcher zwischen einer Glättwalze und einer darunter angeordneten Gegenwalze gebildet wird, wobei die Glättwalze einen flexiblen Walzenmantel besitzt, der von einem Presselement zur Gegenwalze gedrückt wird. Die Erfindung betrifft ferner eine Glättanordnung gemäß dem Oberbegriff des Anspruchs 8.The invention relates to a method for closing an extended nip of a smoothing arrangement for smoothing a paper, board, tissue or another fibrous web in a machine for producing and / or finishing the same, which is formed between a smoothing roll and a counter-roll arranged thereunder. wherein the smoothing roll has a flexible roll shell, which is pressed by a pressing element to the counter roll. The invention further relates to a smoothing arrangement according to the preamble of
Eine solche Glättanordnung ist aus der
Wegen der Breite der Glättwalze, welche durchaus Werte von 10 m erreichen kann, weist der flexible Walzenmantel bei geöffneten Glättspalt infolge des Eigengewichtes einen Durchhang auf. Der Durchhang ist dabei in der Walzenmitte am größten.Because of the width of the smoothing roll, which can reach values of 10 m, the flexible roll shell has a slack when the nip is open due to its own weight. The sag is largest in the middle of the roll.
Hierdurch sammelt sich in der Walzenmitte an der Innenseite des Walzenmantels mehr Schmieröl als an den Rändern, was diesen Effekt noch verstärkt.As a result, more lubricating oil collects in the center of the roll on the inside of the roll shell than at the edges, which further enhances this effect.
Nach dem Überführen der Faserstoffbahn wird der Glättspalt bei rotierenden Glätt- und Gegenwalzen geschlossen.After transferring the fibrous web, the calendering nip is closed with rotating smoothing and counter-rolling rolls.
Auf Grund des Durchhangs kommt die Mitte des Walzenmantels zuerst mit der Gegenwalze in Kontakt, was zu einer verstärkten Belastung der Mitte des Walzenmantels und zu einem Abriss der Faserstoffbahn führen kann.Due to the slack, the center of the roll mantle first comes in contact with the mating roll, which can lead to an increased load on the center of the roll mantle and to a tearing off of the fibrous web.
Dies resultiert insbesondere auch daraus, dass der Walzenmantel im Bereich des Glättspaltes auf Grund seines größeren radialen Abstandes zur Achse im mittleren Bereich auch eine höhere Rotationsgeschwindigkeit als an den Rändern des Walzenmantels aufweist.This results in particular from the fact that the roll shell in the region of the smoothing gap also has a higher rotational speed than at the edges of the roll shell due to its greater radial distance from the axis in the middle region.
Die Aufgabe der Erfindung ist es daher, insbesondere die Gefahr eines Abrisses der Faserstoffbahn mit möglichst einfachen Mitteln zu verringern.The object of the invention is therefore to reduce in particular the risk of tearing the fibrous web with the simplest possible means.
Erfindungsgemäß wurde die Aufgabe durch die Merkmale des kennzeichnenden Teils der Ansprüche 1 und 8.According to the invention the object was achieved by the features of the characterizing part of
Da die Pressfläche in axialer Richtung weitestgehend gerade verläuft, wird bei anliegendem Walzenmantel verhindert, dass dieser durchhängt. Somit wird beim Schließen des Glättspaltes gewährleistet, dass der Walzenmantel über seine gesamte Länge im wesentlichen gleichzeitig mit der Gegenwalze in Kontakt kommt.Since the pressing surface extends largely straight in the axial direction, it is prevented in the adjacent roll shell that this sags. Thus, it is ensured when closing the smoothing nip that the roll shell over its entire length substantially simultaneously comes into contact with the counter roll.
Außerdem wird damit auch gewährleistet, dass die Geschwindigkeit des Walzenmantels im Bereich des Glättspaltes im mittleren Bereich mit der an den Rändern des Walzenmantels übereinstimmt.In addition, this also ensures that the speed of the roll mantle in the region of the smoothing gap in the central region coincides with that on the edges of the roll mantle.
Dabei sollte die Geschwindigkeit des Walzenmantels mit der Umfangsgeschwindigkeit der Gegenwalze übereinstimmen.The speed of the roll mantle should coincide with the peripheral speed of the mating roll.
Im Ergebnis werden der Walzenmantel vor einer ungleichmäßigen Beanspruchung und die Faserstoffbahn vor einer zu starken Belastung infolge einer auch nur bereichsweise auftretenden Differenzgeschwindigkeit zwischen Walzenmantel und Gegenwalze bewahrt.As a result, the roll shell from uneven stress and the fibrous web are preserved from too high a load due to a differential speed between the roll shell and the counter roll, which only occurs in certain regions.
Hierzu ist es in vorteilhafter Weise möglich, dass das Presselement als Mantelspannmittel vor oder während des Schließens des Glättspaltes soweit in Richtung der Gegenwalze gedrückt wird, dass der Walzenmantel über seine gesamte Länge an der Pressfläche des Presselementes anliegt, wobei der Walzenmantel erst danach mit der Gegenwalze in Kontakt gebracht wird.For this purpose, it is advantageously possible that the pressing element is pressed as a jacket clamping means before or during the closing of the nip in the direction of the backing roll, that the roll shell over its entire length rests against the pressing surface of the pressing element, the roll shell only after the counter-roll is brought into contact.
Im allgemeinen führt dies dazu, dass das Presselement über seine Betriebstellung hinaus in Richtung der Gegenwalze gedrückt wird und so den Walzenmantel spannt.
Nach dem Kontakt des Walzenmantels mit der Gegenwalze kann dann das Presselement wieder entlastet werden.In general, this leads to the fact that the pressing element is pressed beyond its operating position in the direction of the counter roll and thus clamps the roll shell.
After contact of the roll mantle with the mating roll, the pressing element can then be relieved again.
In Ergänzung oder separat kann es aber auch vorteilhaft sein, wenn der Walzenmantel über Mantelspannmittel vor oder während des Schließens des Glättspaltes, vorzugsweise in Form von axial im Walzenmantel verlaufenden Führungsleisten, welche den Walzenmantel außerhalb des Presselementes radial nach außen drücken, derart gespannt wird, dass der Walzenmantel über seine gesamte Länge an der Pressfläche des Presselementes anliegt, wobei der Walzenmantel erst danach mit der Gegenwalze in Kontakt gebracht wird.In addition or separately, however, it may also be advantageous if the roll mantle is tensioned by means of jacket clamping means before or during the closing of the smoothing gap, preferably in the form of guide rails extending axially in the roll shell, which press the roll mantle radially outwards outside the press element the roll mantle bears against the pressing surface of the pressing element over its entire length, the roll mantle only then being brought into contact with the mating roll.
Hierbei ist es möglich, dass das Mantelspannmittel radial entgegen der Pressrichtung des Presselementes wirkt und so den Walzenmantel anhebt, bis dieser vollständig an der Pressfläche des Presselementes anliegt.In this case, it is possible that the jacket clamping means acts radially counter to the pressing direction of the pressing element and thus raises the roll shell until it lies completely against the pressing surface of the pressing element.
In Ergänzung hierzu oder unabhängig können die Mantelspannmittel jedoch auch mit einer Wirkrichtung schräg, vorzugsweise beidseitig der und symmetrisch zur Pressebene wirken.In addition to this or independently, however, the jacket clamping means can also act obliquely with a direction of action, preferably on both sides and symmetrically to the press plane.
Dies führt dazu, dass der Walzenmantel mit einer Komponente quer zur Pressrichtung aus der Kreisform gedrückt und dadurch gespannt wird. Durch dieses Spannen wir der Walzenmantel zum Presselement hingezogen.As a result, the roll shell is pressed out of the circular shape with a component transverse to the pressing direction and thereby tensioned. As a result of this tensioning, the roll shell is attracted to the pressing element.
Die Führungsleisten verlaufen axial über die gesamte Länge der Walze und sorgen während des Betriebs für eine zylindrische Form des flexiblen Walzenmantels.The guide rails extend axially over the entire length of the roller and provide during operation for a cylindrical shape of the flexible roller shell.
Zumindest in Ergänzung dieser Maßnahmen ist es auch vorteilhaft, wenn der Walzenmantel während des Schließens des Glättspaltes über das Mantelsaugmittel, vorzugsweise in Form des mit Saugöffnungen versehenen Presselementes an die Pressfläche des Presselementes gesaugt wird.At least in addition to these measures, it is also advantageous if the roll shell during the closing of the calendering nip on the jacket suction means, preferably in the form of the suction openings provided with the pressing element is sucked to the pressing surface of the pressing element.
Hierzu müssen die Saugöffnungen lediglich mit einer Unterdruckquelle verbunden werden.For this purpose, the suction openings must be connected only to a vacuum source.
Dabei wird auch das Schmiermittel aus dem Walzenmantel abgesaugt, was das Gewicht mindert.In this case, the lubricant is sucked out of the roll shell, which reduces the weight.
Falls die Saugkräfte ausreichend groß sind bzw. der Walzenmantel entsprechend leicht ist, kann die Ansaugung des Walzenmantels auch als alleiniges Mittel zur Lösung der erfinderischen Aufgabe eingesetzt werden.If the suction forces are sufficiently large or the roll mantle is correspondingly light, the suction of the roll mantle can also be used as the sole means of achieving the inventive task.
Um den Durchhang des Walzenmantels etwas entgegen zu wirken ist es ebenso von Vorteil, wenn der Luftdruck im Walzenmantel während des Schließens des Glättspaltes erhöht wird, wobei der Luftdruck höher als während des Betriebs der Glättwalze ist.In order to counteract the sag of the roll shell, it is also advantageous if the air pressure in the roll shell is increased during the closing of the calendering nip, the air pressure being higher than during the operation of the smoothing roll.
Zur Bildung eines verlängerten Pressspaltes können die Glätt- und die Gegenwalze einen flexiblen Walzenmantel besitzen, was die Bildung eines ebenen verlängerten Glättspaltes erlaubt.To form an extended press nip, the smoothing and backing rolls may have a flexible roll shell which allows the formation of a flat extended nip.
Überwiegend ist jedoch gegenwärtig die Gegenwalze zylindrisch ausgebildet, weshalb das Presselement zur Bildung eines verlängerten Glättspaltes eine konkave Pressfläche besitzt.Predominantly, however, currently the counter-roller is cylindrical, which is why the pressing member has a concave pressing surface to form an elongated smoothing nip.
Insbesondere bei der konkaven Pressfläche genügt es bei allen Lösungen, wenn der Walzenmantel während des Schließens des Glättspaltes lediglich mit den radial hervorstehenden Bereichen der Pressfläche in Kontakt gebracht wird.Particularly in the case of the concave pressing surface, it is sufficient for all solutions if the roll shell is brought into contact only with the radially protruding regions of the pressing surface during the closing of the smoothing gap.
Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt:
- Figur 1:
- einen schematischen Querschnitt durch eine Glättanordnung und
- Figur 2:
- eine andere Glättanordnung mit
verschiebbaren Führungsleisten 7.
- FIG. 1:
- a schematic cross section through a smoothing arrangement and
- FIG. 2:
- another smoothing arrangement with sliding
guide rails 7.
In beiden Fällen wird der Glättspalt der Glättanordnung einer Papiermaschine von einer Glättwalze 2 und einer darunter angeordneten zylindrischen Gegenwalze 3 gebildet.In both cases, the smoothing nip of the smoothing arrangement of a paper machine is formed by a
Dabei besitzt die Glättwalze 2 einen flexiblen Walzenmantel 4 aus faserverstärktem Kunststoff, der zur Bildung eines verlängerte Glättspaltes von einem Presselement 5 mit konkaver Pressfläche zur Gegenwalze 3 gedrückt wird.In this case, the
Der verlängerte Glättspalt bewirkt wegen der verlängerten Verweilzeit der Faserstoffbahn 1 im Glättspalt eine wesentliche Verbesserung des Glättergebnisses bei gleichzeitiger Schonung derselben.Due to the extended residence time of the
Zur Formgebung wird der flexible Walzenmantel 4 von innen über mehrere axial verlaufende Führungsleisten 6,7 abgestützt. Während eine Führungsleiste 6 auf der gegenüberliegenden Seite des Presselementes 5 angeordnet ist, befindet sich jeweils eine Führungsleiste 7 symmetrisch zur Pressebene 9 in den beiden unteren Quadranten der Glättwalze 2.For shaping the
Außerdem wird die Formgebung noch dadurch unterstützt und einem Durchhang entgegengewirkt, dass der Luftdruck im Walzenmantel 4 während des Schließens des Glättspaltes erhöht wird, wobei der Luftdruck höher als während des Betriebs der Glättwalze 2 ist.In addition, the shaping is further assisted and counteracts sag that the air pressure in the
Hierbei wird die Faserstoffbahn 1 erst vollständig durch den offenen Glättspalt geführt, bevor dieser geschlossen wird. Um dies möglichst schonend und ohne Differenzgeschwindigkeit zwischen dem Walzenmantel 4 und der Gegenwalze 3 zu gewährleisten, wird nicht nur der Walzenmantel 4 auf die gleiche Geschwindigkeit wie die Gegenwalze 3 beschleunigt, sondern auch der Walzenmantel 4 während des Schließens des Glättspaltes mit den hervorstehenden Teilen der konkaven Pressfläche des Presselementes 5 in Kontakt gebracht.Here, the
Da die Pressfläche in axialer Richtung weitestgehend gerade verläuft, hat somit der Walzenmantel 4 im Bereich des Glättspaltes über seine gesamte Länge im wesentlichen den gleichen radialen Abstand zur Walzenachse.Since the pressing surface in the axial direction is largely straight, thus the
Dies ist die Grundlage dafür, dass der Walzenmantel 4 über seine gesamte Länge zumindest etwa gleichzeitig und mit der gleichen Geschwindigkeit mit der Gegenwalze 3 in Kontakt gebracht werden kann.This is the basis for the fact that the
Dies minimiert die Belastung des Walzenmantels 4 und beugt einem Abriss der Faserstoffbahn 1 beim Schließen des Glättspaltes vor.This minimizes the load on the
Gemäß Figur 1 erfolgt das Spannen des Walzenmantels 4 dadurch, dass das Presselement 5 als Mantelspannmittel vor oder während des Schließens des Glättspaltes soweit in Richtung der Gegenwalze 3 gedrückt wird, dass der Walzenmantel 4 über seine gesamte Länge teilweise an der Pressfläche des Presselementes 5 anliegt. Dabei wird der Walzenmantel 4 von den Führungsleisten 6, 7 gehalten.According to Figure 1, the clamping of the
Erst danach wird der Walzenmantel 4 mit der Gegenwalze 3 in Kontakt gebracht.Only then is the
Um dabei den Kontakt des Walzenmantels 4 an der Pressfläche des Presselementes 5 noch zu unterstützen, besitzt diese Saugöffnungen 8 welche mit einer Unterdruckquelle verbunden sind und so den Walzenmantel 4 an das Presselement 5 saugen.In order to support the contact of the
Im Gegensatz hierzu zeigt Figur 2 eine Ausführungsform, bei der der Walzenmantel 4 vor oder während des Schließens des Glättspaltes über Mantelspannmittel in Form von axial im Walzenmantel 4 verlaufenden Führungsleisten 7, welche den Walzenmantel 4 außerhalb des Presselementes 5 radial nach außen drücken, derart gespannt wird, dass der Walzenmantel 4 über seine gesamte axiale Länge teilweise an der Pressfläche des Presselementes 5 anliegt.In contrast, Figure 2 shows an embodiment in which the
Auch hier wird der Walzenmantel 4 erst danach mit der Gegenwalze 3 in Kontakt gebracht.Again, the
Die Führungsleisten 7 in den beiden unteren Quadranten der Glättwalze 2 wirken hier schräg, aber symmetrisch zur Pressebene 9 und drücken den Walzenmantel 4 so quer zur Pressebene 9 aus seiner Kreisform.The guide rails 7 in the two lower quadrants of the
In beiden Ausführungen wird der Walzenmantel 4 auf der dem Presselement 5 gegenüberliegenden Seite von einer Führungsleiste 6 stabilisiert.In both embodiments, the
Claims (8)
- Method of closing an extended calendering nip of a calendering arrangement for calendering a fibrous web (1), in particular a paper, board or tissue web, in a machine for producing and/or finishing the same, which nip is formed between a calendering roll (2) and an opposing roll (3) arranged underneath, the calendering roll (2) having a flexible roll shell (4) which is pressed towards the opposing roll (3) by a pressing element (5), characterized in that, before or during the closure of the calendering nip by means of shell tensioning means (5, 6, 7) and/or during the closure of the calendering nip by means of shell suction means (8), the roll shell (4) in the region of the calendering nip is brought into contact with the pressing surface of the pressing element (5) over its entire length, the roll shell (4) only then being brought into contact with the opposing roll (3).
- Method according to Claim 1, characterized in that, before or during the closure of the calendering nip, the pressing element (5) as a shell tensioning means is pressed in the direction of the opposing roll (3) to such an extent that the roll shell (4) rests on the pressing surface of the pressing element (5) over its entire length.
- Method according to Claim 1 or 2, characterized in that, before or during the closure of the calendering nip, the roll shell (4) is tensioned via a shell tensioning means, preferably in the form of guide strips (6, 7) running axially in the roll shell (4), which press the roll shell (4) radially outwards outside the pressing element (5), in such a way that the roll shell (4) rests on the pressing surface of the pressing element (5) over its entire length.
- Method according to Claim 3, characterized in that the shell tensioning means act radially counter to the pressing direction of the pressing element (5) and/or with an active direction at an angle with respect to the pressing plane (9), preferably on both sides of and symmetrically with respect to the pressing plane (9).
- Method according to one of the preceding claims, characterized in that, during the closure of the calendering nip, the roll shell (4) is attracted to the pressing surface of the pressing element (5) by suction via the shell suction means, preferably in the form of a pressing element (5) provided with suction openings (8).
- Method according to one of the preceding claims, characterized in that, during the closure of the calendering nip, the air pressure in the roll shell (4) is increased, the air pressure being higher than during the operation of the calendering roll (2).
- Method according to one of the preceding claims, characterized in that the speed of the roll shell (4) in the calendering nip region during the closure of the calendering nip is brought at least into approximate agreement with the peripheral speed of the opposing roll (3).
- Calendering arrangement for calendering a paper, board, tissue or another fibrous web (1) in a machine for producing and/or finishing the same having an extended calendering nip, which is formed between a calendering roll (2) and an opposing roll (3) arranged underneath, the calendering roll (2) having a flexible roll shell (4) which is pressed towards the opposing roll (3) by a pressing element (5), in particular for implementing the method according to one of the preceding claims, characterized in that shell tensioning and/or suction means are provided which ensure that, during the closure of the calendering nip, the roll shell (4) in the region of the calendering nip rests on the pressing surface of the pressing element (5) over its entire length before the roll shell (4) is brought into contact with the opposing roll (3).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510013627 DE102005013627A1 (en) | 2005-03-24 | 2005-03-24 | shooting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1705287A1 EP1705287A1 (en) | 2006-09-27 |
| EP1705287B1 true EP1705287B1 (en) | 2008-01-09 |
Family
ID=35447938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20050110684 Expired - Fee Related EP1705287B1 (en) | 2005-03-24 | 2005-11-14 | Method of closing an extended calendering nip and calendering arrangement |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1705287B1 (en) |
| DE (2) | DE102005013627A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110844669B (en) * | 2019-10-22 | 2021-04-20 | 温州职业技术学院 | Strip coiling tension applying equipment used in slitting production line |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI5264U1 (en) * | 2001-11-06 | 2002-02-28 | Metso Paper Inc | Arrangements for opening and closing a roller pin in a shoe calendar |
| DE10206333C1 (en) * | 2002-02-14 | 2003-07-31 | Voith Paper Patent Gmbh | Wide nip calender arrangement and method for satinizing a paper or Karrton web |
-
2005
- 2005-03-24 DE DE200510013627 patent/DE102005013627A1/en not_active Withdrawn
- 2005-11-14 EP EP20050110684 patent/EP1705287B1/en not_active Expired - Fee Related
- 2005-11-14 DE DE200550002496 patent/DE502005002496D1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005013627A1 (en) | 2006-09-28 |
| EP1705287A1 (en) | 2006-09-27 |
| DE502005002496D1 (en) | 2008-02-21 |
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