EP1883732B1 - Calender - Google Patents

Calender Download PDF

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Publication number
EP1883732B1
EP1883732B1 EP05815437A EP05815437A EP1883732B1 EP 1883732 B1 EP1883732 B1 EP 1883732B1 EP 05815437 A EP05815437 A EP 05815437A EP 05815437 A EP05815437 A EP 05815437A EP 1883732 B1 EP1883732 B1 EP 1883732B1
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EP
European Patent Office
Prior art keywords
rolls
roll
calender according
stack
lever
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
Application number
EP05815437A
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German (de)
French (fr)
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EP1883732A1 (en
Inventor
Peter Svenka
Josef Pav
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Kuesters GmbH
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Andritz Kuesters GmbH
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Publication of EP1883732A1 publication Critical patent/EP1883732A1/en
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Publication of EP1883732B1 publication Critical patent/EP1883732B1/en
Expired - Fee Related legal-status Critical Current
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00Calenders; Smoothing apparatus
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00Calenders; Smoothing apparatus
    • D21G1/002Opening or closing mechanisms; Regulating the pressure

Definitions

  • the invention relates to a calender for the treatment of a web, in particular a paper web, according to the preamble of claim 1.
  • a calender with a longitudinally inclined to the horizontal inclined stand on which a roll stack is arranged with a likewise inclined stack level.
  • the roll stack has end rolls and a plurality of intermediate rolls which are arranged on the underside of the stand.
  • the lower and upper rollers are fixable by hydraulic tensioning devices on the stand.
  • the center rollers are carried by levers which are pivotable about pivot points in the stand and can cooperate with a stop which fixes their position when lowering the rollers.
  • the levers are approximately transversely to the stack level.
  • a calender with a stack of rolls which has at least four rollers whose axes lie in a plane inclined to the horizontal stacking plane, wherein at least the intermediate rollers located between the end rollers are mounted on levers, which act on force generators.
  • the roll stack is located on an upper side of the stand.
  • the inclination of the roll stack has, inter alia, the advantage that the weight of the center rolls is relieved to about 30%.
  • the levers are approximately perpendicular to the stack level. They are pivotable by a limited angle, which allows a roller separation and the use of a roller through a roller of other diameters.
  • the force generators are piston-cylinder units, which form an effective attenuator during the roller separation.
  • the levers are double-armed and can be pivoted to an approximately vertical position, in order to be able to compensate for the middle roll weight and virtually completely compensate it.
  • a roller separation is possible here only by approaching certain angular positions of the lever. The requirements for a rapid quick separation can therefore not be met.
  • a calender for web-shaped materials, such as paper, having a stand and a roll stack comprising a bottom roll, a top roll, and at least one center roll disposed therebetween.
  • the stack level of the roll stack is inclined to the horizontal.
  • the displacement is done by hydraulic cylinders to control the transverse movement in a simple manner.
  • the disadvantage is the requirement for additional control.
  • the transverse movement can also lead to undesirable roller contacts in web breaks.
  • the object of the invention is therefore to provide a calender according to the preamble of claim 1, which provides very good smoothness results while allowing a quick quick release to open the roll stack.
  • a calender which uses the gravity effect of the roll weights for roller separation and thereby enables rapid roll separation.
  • the known compensation possibilities of the self-weight forces for setting a line load characteristic can be used.
  • the calender is also vibration resistant and allows easy roll change.
  • the roll stack may have a selectable number of center rolls.
  • the at least one center roller is suspended vertically in an open and closed roll stack in a support lever.
  • the center roll is freed of its own weight component and the force component of the overhanging weights that would otherwise act in the nip, by their perfect compensation. This allows an exact initiation and adjustment of the line loads or compressive stresses in the nip. This also gives the precise control of the calendering results.
  • the center roll or the center rolls are individually lowered under the influence of their own weight forces, preferably only in the vertical direction.
  • the lever carrying a center roller is then loaded only by tensile forces and is always in a statically determined, balanced, ie stable position.
  • the roll stack is thereby constructed vibration-damping. The formation of vibration-exciting impulses, which otherwise cause the impression of a deformation pattern, in particular in the elastic rollers, is prevented. The risk of damage to the elastic rollers is significantly reduced.
  • a simple vertical movability of the lever of a center roller can be used, whereby a relative movement to the adjacent rollers is made possible.
  • the vertical mobility of the lever of a center roller can be realized by a built-in lever in the hydraulic cylinder, which can enhance the damping when lowering the rollers.
  • the at least one center roll is vertically suspended with a stack of rolls in a support lever, with spacing of the roll body of the center roll to the adjacent rolls.
  • the lever of the at least one center roll is slightly swung from the vertical position. If there are several intermediate rolls, this swinging out is stepped. In the quick release process, the lever or levers are relieved and return to their vertical position. As a result, the rollers are separated as quickly as possible and can be supported on damping power cylinders.
  • FIGS. 1 and 2 show a calender 1 for the treatment of a web, in particular a paper, board or textile web, with at least one adjustable between an open and a closed position roll stack 2 from each of an upper end roll 3 and a lower end roll 4 and at least one intermediate roll 5, 6, 7, 8, which are arranged together in a plane inclined to the horizontal stacking plane S on a bottom 9 of a stand 10.
  • the at least one intermediate roller 5, 6, 7, 8 is mounted on a lever 10, 12, 13, 14 held on the stand 10.
  • the in Fig. 2 is shown, the at least one intermediate roller 5, 6, 7, 8 as a hanging on the associated lever 11, 12, 13, 14 suspended weight body hanging down freely on the stand 10.
  • the at least one intermediate roller 5, 6, 7, 8 is preferably supported by a vertically suspended lever 11, 12, 13, 14.
  • the roll stack 2 is thus a 6-roll stack, which can be provided for a two-sided treatment of a web.
  • the roll stack 2 preferably comprises hard and soft rolls for forming soft nips.
  • two adjacent intermediate rolls 6, 7 can furthermore be formed as soft rolls.
  • the illustrated calender has a stand 10 which extends at an angle of about 45 ° to a horizontal footprint H. At the head end, the stand 10 is connected to a shelf support 16 via a longitudinal member 15.
  • the roll stack 2 hangs on the underside 9 of the upright 10, with a stacking plane S in the closed position of the roll stack 2, as in FIG FIG. 1 shown, which also extends at an angle of about 45 ° to the horizontal footprint H.
  • the stack level may have a pitch in the range of 40 to 50 degrees.
  • the upper end roller 3 and the lower end roller 4 are mounted in brackets 17, 18, in particular linear guides, which can be fastened to the stand 10, preferably optionally slidable. From at least one end of the roll stack 2 can be loaded, including a hydraulic cylinder 19 is provided, which acts here on the holder 18 of the lower end roll 4 and the holder 18 together with the lower end roll 4 in the stacking plane S shifts.
  • the upper and lower end rollers 3, 4 are also preferably bending adjusting rollers.
  • the center rollers 5, 6, 7, 8 are mounted with their bearings on the associated levers 11, 12, 13, 14, about pivot axes 20, 21, 22, 23 on the stand 10 directly or to associated brackets 24, 25, 26, 27th , which are fastened to the stand 10, as in FIG. 2 shown, are pivotable.
  • the intermediate rollers 5, 6, 7, 8 are held on the associated lever 11, 12, 13, 14 hanging down, to which the levers 11, 12, 13, 14 are formed with one arm or two arms.
  • the levers 11, 12, 13, 14 are formed with two arms to hang the levers 11, 12, 13, 14 via pivot axes 20, 21, 22, 23 to the brackets 24, 25, 26, 27.
  • the swing arch can then be made tight.
  • the levers 11, 12, 13, 14 are held at a plurality of intermediate rollers 5, 6, 7, 8 spaced from each other on the stand 10, that in the closed position of the roller stack 2 all intermediate rollers hang freely down and are preferably supported vertically suspended.
  • the intermediate rollers 5, 6, 7, 8 suspended from the levers 11, 12, 13, 14 are fastened to each other in a positionable manner on the stand 10, so that for each roller diameter of an intermediate roller 5, 6, 7 , 8 for the freely downwardly suspended intermediate rollers closing the roll stack is adjustable
  • the levers 11, 12, 13, 14 can be loaded by force transmitters in the form of piston-cylinder units 28, 29, 30, 31.
  • the force transmitters 28, 29, 30, 31 engage opposite ends at the end carrying the weight body of the intermediate roll.
  • the levers 11, 12, 13, 14 can be extended, for which purpose cylinder units can be provided.
  • an extensibility is provided when more than one intermediate roll 5, 6, 7, 8 are provided. If the levers 11, 12, 13, 14 of the intermediate rolls 5, 6, 7, 8 are chosen to be of different lengths, then the roll stack is separated by offset downwardly depending center rolls 5, 6, 7, 8, when the end rolls 3, 4 are moved to the outside. The directions of movement are indicated by arrows.
  • the rolls 3 to 8 constituting the roll stack 2 can have all different roll diameters.
  • the roll diameters of the intermediate rolls 5, 6, 7, 8 are preferably smaller than the roll diameters of the end rolls 3, 4. In the case of several intermediate rolls 5, 6, 7, 8, all intermediate rolls may also have the same roll diameters.
  • All rolls 3, 4, 5, 6, 7, 8 are furthermore preferably provided with their own power drive 32, 33, 34, 35, 36, 37.
  • the intermediate rolls 6, 7 may be formed as soft rolls to form an exchange gap.
  • the suspended intermediate rollers 5, 6, 7, 8 are positioned in a vertically suspended state at a distance from each other.
  • the distance may be selectable for determining a nip opening width.
  • the intermediate rollers 5, 6, 7, 8 preferably hang on levers 51, 52, 53, 54, which are in one arm and are articulated with swivel axles 20, 21, 22, 23 provided in the upright 10. Under the weight of the weight body of the intermediate rolls 5, 6, 7, 8, the levers 51, 52, 53, 54 hang freely with the intermediate rollers 5, 6, 7, 8 as a head load down.
  • each lever 51, 52, 53, 54 engages a force transmitter 28, 29, 30, 31, via which each lever 51, 52, 53, 54 is pivotable about the intermediate rollers 5, 6, 7, 8 against each other pivot, that the roll stack 2 is closed in the stacking plane S, as in FIG. 4 is shown. Arrows illustrate the directions of movement.
  • Stops 55, 56, 57 may be provided to prevent oscillation of the swung-intermediate rolls 6, 7, 8 when opening the roll stack 2.

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  • Paper (AREA)

Description

Die Erfindung betrifft einen Kalander für die Behandlung einer Warenbahn, insbesondere einer Papierbahn, nach dem Oberbegriff des Anspruchs 1.The invention relates to a calender for the treatment of a web, in particular a paper web, according to the preamble of claim 1.

Aus EP 1 114 891 B1 ist ein Kalander mit einem in Längsrichtung schräg zur Horizontalen geneigten Ständer bekannt, an dem ein Walzenstapel mit einer ebenfalls geneigten Stapelebene angeordnet ist. Der Walzenstapel weist Endwalzen und mehrere Zwischenwalzen auf, die an der Unterseite des Ständers angeordnet sind. Die Unter- und Oberwalze sind dabei durch hydraulische Spannvorrichtungen am Ständer fixierbar. Die Mittelwalzen sind von Hebeln getragen, die um Drehpunkte im Ständer schwenkbar sind und mit einem Anschlag zusammenwirken können, der ihre Lage bei einem Absenken der Walzen fixiert. Die Hebel stehen etwa quer zur Stapelebene. Beim Öffnen des Walzenstapels sind die Arretiereinrichtungen hohen mechanischen Belastungen ausgesetzt, so daß ein starker Verschleiß auftritt. Das Öffnen des Walzenstapels ist ferner nicht hinreichend schnell, um den Anforderungen an eine moderne Schnelltrennung bei einem Online-Betrieb mit Laufgeschwindigkeiten der Warenbahn von über 1500 m/min zu genügen.Out EP 1 114 891 B1 a calender with a longitudinally inclined to the horizontal inclined stand is known, on which a roll stack is arranged with a likewise inclined stack level. The roll stack has end rolls and a plurality of intermediate rolls which are arranged on the underside of the stand. The lower and upper rollers are fixable by hydraulic tensioning devices on the stand. The center rollers are carried by levers which are pivotable about pivot points in the stand and can cooperate with a stop which fixes their position when lowering the rollers. The levers are approximately transversely to the stack level. When opening the roller stack, the locking devices are exposed to high mechanical loads, so that a heavy wear occurs. The opening of the roll stack is also not sufficiently fast to meet the requirements of a modern Quick separation in an online operation with running speeds of the web of more than 1500 m / min to meet.

Aus EP 1 188 858 B1 ist ein Kalander mit einem Walzenstapel bekannt, der mindestens vier Walzen aufweist, deren Achsen in einer zur Horizontalen geneigten Stapelebene liegen, wobei zumindest die zwischen den Endwalzen befindlichen Mittelwalzen an Hebeln gelagert sind, an denen Kraftgeber angreifen. Der Walzenstapel befindet sich dabei auf einer Oberseite des Ständers. Die Schrägstellung des Walzenstapels hat unter anderem den Vorteil, daß das Gewicht der Mittelwalzen zu etwa 30% entlastet wird. Die Hebel stehen etwa senkrecht zur Stapelebene. Sie sind um einen begrenzten Winkel schwenkbar, der eine Walzentrennung und den Einsatz einer Walze durch eine Walze anderen Durchmessers erlaubt. Die Kraftgeber sind Kolben-Zylinder-Einheiten, die bei der Walzentrennung ein wirksames Dämpfungsglied bilden. Um das Gewicht der Mittelwalzen weiter zu entlasten ist vorgesehen, daß die Hebel doppelarmig sind und bis in eine etwa vertikale Stellung schwenkbar sind, um das Mittelwalzengewicht wählbar und bis praktisch vollkommen kompensieren zu können. Eine Walzentrennung ist hier nur durch Anfahren bestimmter Winkelstellungen der Hebel möglich. Die Anforderungen an eine rasche Schnelltrennung können deshalb nicht erfüllt werden.Out EP 1 188 858 B1 a calender with a stack of rolls is known, which has at least four rollers whose axes lie in a plane inclined to the horizontal stacking plane, wherein at least the intermediate rollers located between the end rollers are mounted on levers, which act on force generators. The roll stack is located on an upper side of the stand. The inclination of the roll stack has, inter alia, the advantage that the weight of the center rolls is relieved to about 30%. The levers are approximately perpendicular to the stack level. They are pivotable by a limited angle, which allows a roller separation and the use of a roller through a roller of other diameters. The force generators are piston-cylinder units, which form an effective attenuator during the roller separation. To further relieve the weight of the center rollers, it is provided that the levers are double-armed and can be pivoted to an approximately vertical position, in order to be able to compensate for the middle roll weight and virtually completely compensate it. A roller separation is possible here only by approaching certain angular positions of the lever. The requirements for a rapid quick separation can therefore not be met.

Aus EP 1 026 316 B1 ist ein Kalander für bahnförmige Materialien, wie Papier, mit einem Ständer und einem Walzenstapel bekannt, der eine Unterwalze, eine Oberwalze und mindestens eine dazwischen angeordnete Mittelwalze aufweist. Die Stapelebene des Walzenstapels ist zur Horizontalen geneigt. Damit die Trennung der Walzen besonders rasch erfolgen kann ist vorgesehen, daß mindestens eine Zwischenwalze relativ zur Nachbarwalze in einer etwa senkrecht zur Stapelebene verlaufenden Querrichtung verlagerbar ist. Die Verlagerung erfolgt durch Hydrozylinder, um die Querbewegung auf einfache Weise zu steuern. Nachteilig ist das Erfordernis einer zusätzlichen Steuerung. Die Querbewegung kann ferner zu unerwünschten Walzenkontakten bei Bahnrissen führen. Aufgabe der Erfindung ist es daher, einen Kalander nach dem Oberbegriff des Anspruchs 1 zu schaffen, der sehr gute Glätteergebnisse liefert und dabei eine rasche Schnelltrennung zum Öffnen des Walzenstapels erlaubt.Out EP 1 026 316 B1 For example, a calender is known for web-shaped materials, such as paper, having a stand and a roll stack comprising a bottom roll, a top roll, and at least one center roll disposed therebetween. The stack level of the roll stack is inclined to the horizontal. Thus, the separation of the rollers can be done very quickly provided that at least one intermediate roller is displaceable relative to the adjacent roller in a direction approximately perpendicular to the stack level transverse direction. The displacement is done by hydraulic cylinders to control the transverse movement in a simple manner. The disadvantage is the requirement for additional control. The transverse movement can also lead to undesirable roller contacts in web breaks. The object of the invention is therefore to provide a calender according to the preamble of claim 1, which provides very good smoothness results while allowing a quick quick release to open the roll stack.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Hierdurch wird ein Kalander geschaffen, der zur Walzentrennung die Schwerkraftwirkung der Walzengewichte nutzt und dadurch eine schnelle Walzentrennung ermöglicht. Die bekannten Kompensationsmöglichkeiten der Eigengewichtskräfte zur Einstellung einer Streckenlast-Kennlinie sind einsetzbar. Der Kalander ist ferner vibrationsfest und erlaubt einen einfachen Walzenwechsel.As a result, a calender is created, which uses the gravity effect of the roll weights for roller separation and thereby enables rapid roll separation. The known compensation possibilities of the self-weight forces for setting a line load characteristic can be used. The calender is also vibration resistant and allows easy roll change.

Der Walzenstapel kann eine wählbare Anzahl Mittelwalzen aufweisen.The roll stack may have a selectable number of center rolls.

Gemäß einem bevorzugten Ausführungsbeispiel ist die mindestens eine Mittelwalze bei geöffnetem als auch geschlossenem Walzenstapel in einem Traghebel vertikal aufgehängt. Dadurch ist die Mittelwalze von ihrer Eigengewichtskomponente und der Kraftkomponente der überhängenden Gewichte, die sonst in den Nip wirken, befreit, und zwar durch ihre vollkommene Kompensation. Dies ermöglicht eine exakte Einleitung und Einstellung der Streckenlasten bzw. Druckspannungen im Nip. Dadurch ist auch die präzise Steuerung der Satinage-Ergebnisse gegeben. Beim Schnelltrennvorgang wird die Mittelwalze oder werden die Mittelwalzen einzeln unter dem Einfluß ihrer Eigengewichtskräfte vorzugsweise ausschließlich in Vertikalrichtung abgesenkt. Der eine Mittelwalze tragende Hebel wird dann nur durch Zugkräfte belastet und befindet sich stets in einer statisch bestimmten, ausbalancierten, d.h. stabilen Position. Der Walzenstapel ist hierdurch auch schwingungsdämpfend aufgebaut. Die Entstehung vibrationserregender Impulse, die sonst die Einprägung eines Verformungsmusters insbesondere bei den elastischen Walzen hervorrufen, wird verhindert. Die Gefahr einer Beschädigung der elastischen Walzen wird deutlich reduziert.According to a preferred embodiment, the at least one center roller is suspended vertically in an open and closed roll stack in a support lever. As a result, the center roll is freed of its own weight component and the force component of the overhanging weights that would otherwise act in the nip, by their perfect compensation. This allows an exact initiation and adjustment of the line loads or compressive stresses in the nip. This also gives the precise control of the calendering results. In the quick release process, the center roll or the center rolls are individually lowered under the influence of their own weight forces, preferably only in the vertical direction. The lever carrying a center roller is then loaded only by tensile forces and is always in a statically determined, balanced, ie stable position. The roll stack is thereby constructed vibration-damping. The formation of vibration-exciting impulses, which otherwise cause the impression of a deformation pattern, in particular in the elastic rollers, is prevented. The risk of damage to the elastic rollers is significantly reduced.

Zum Öffnen und Schließen des Walzenstapels kann eine einfache vertikale Verfahrbarkeit des Hebels einer Mittelwalze genutzt werden, wodurch eine Relativbewegung zu den Nachbarwalzen ermöglicht wird. Die beim Schnelltrennvorgang eingeleiteten Abbremskräfte, die bis zum Stillstand der Walzen in ihrer Trennposition wirken, sorgen ebenfalls für einen vibrationsfreien Betrieb. Die vertikale Verfahrbarkeit des Hebels einer Mittelwalze kann durch einen in den Hebel eingebauten Hydrozylinder realisiert werden, der die Dämpfung bei Absenkung der Walzen verstärken kann.For opening and closing the roller stack, a simple vertical movability of the lever of a center roller can be used, whereby a relative movement to the adjacent rollers is made possible. The deceleration forces introduced during the quick-release process, which act in their separating position until the rollers stop, also ensure vibration-free operation. The vertical mobility of the lever of a center roller can be realized by a built-in lever in the hydraulic cylinder, which can enhance the damping when lowering the rollers.

Gemäß einem anderen bevorzugten Ausführungsbeispiel ist die mindestens eine Mittelwalze bei geöffnetem Walzenstapel in einem Traghebel vertikal aufgehängt, und zwar mit Abstand des Walzenkörpers der Mittelwalze zu den benachbarten Walzen. Zum Schließen des Walzenstapels wird der Hebel der mindestens einen Mittelwalze von der vertikalen Position geringfügig ausgeschwenkt. Bei mehreren Zwischenwalzen erfolgt dieses Ausschwenken abgestuft. Beim Schnelltrennvorgang wird der Hebel oder werden die Hebel entlastet und kehren in ihre vertikale Position zurück. Dadurch werden die Walzen schnellstens voneinander getrennt und können sich an dämpfenden Kraftzylindern abstützen.According to another preferred embodiment, the at least one center roll is vertically suspended with a stack of rolls in a support lever, with spacing of the roll body of the center roll to the adjacent rolls. To close the roll stack, the lever of the at least one center roll is slightly swung from the vertical position. If there are several intermediate rolls, this swinging out is stepped. In the quick release process, the lever or levers are relieved and return to their vertical position. As a result, the rollers are separated as quickly as possible and can be supported on damping power cylinders.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.

Die Erfindung wird nachstehend anhand der in den beigefügten Abbildungen dargestellten Ausführungsbeispiele näher erläutert.

  • Fig. 1 zeigt schematisch eine Seitenansicht eines ersten Ausführungsbeispiels eines Kalanders mit geschlossenem Walzenstapel,
  • Fig. 2 zeigt schematisch eine Seitenansicht des Kalanders gemäß Fig. 1 mit geöffnetem Walzenstapel,
  • Fig. 3 zeigt schematisch eine Seitenansicht eines zweiten Ausführungsbeispiels eines Kalanders mit geöffnetem Walzenstapel,
  • Fig. 4 zeigt schematisch eine Seitenansicht des Kalanders gemäß Fig. 3 mit geschlossenem Walzenstapel.
The invention will be explained in more detail with reference to the embodiments illustrated in the accompanying drawings.
  • Fig. 1 shows schematically a side view of a first embodiment of a calender with closed roll stack,
  • Fig. 2 schematically shows a side view of the calender according to Fig. 1 with open roll stack,
  • Fig. 3 schematically shows a side view of a second embodiment of a calender with open roll stack,
  • Fig. 4 schematically shows a side view of the calender according to Fig. 3 with closed roll stack.

Die Figuren 1 und 2 zeigen einen Kalander 1 für die Behandlung einer Warenbahn, insbesondere einer Papier-, Karton- oder Textilbahn, mit mindestens einem zwischen einer geöffneten und einer geschlossenen Stellung verstellbaren Walzenstapel 2 aus jeweils einer oberen Endwalze 3 und einer unteren Endwalze 4 und mindestens einer Zwischenwalze 5, 6, 7, 8, die gemeinsam in einer zur Horizontalen geneigten Stapelebene S an einer Unterseite 9 eines Ständers 10 angeordnet sind. Die mindestens eine Zwischenwalze 5, 6, 7, 8 ist an einem am Ständer 10 gehaltenen Hebel 11, 12, 13, 14 gelagert. In der geöffneten Stellung des Walzenstapels 2, die in Fig. 2 dargestellt ist, ist die mindestens eine Zwischenwalze 5, 6, 7, 8 als ein an dem zugehörigen Hebel 11, 12, 13, 14 aufgehängter Gewichtskörper frei nach unten hängend am Ständer 10 gehalten.The FIGS. 1 and 2 show a calender 1 for the treatment of a web, in particular a paper, board or textile web, with at least one adjustable between an open and a closed position roll stack 2 from each of an upper end roll 3 and a lower end roll 4 and at least one intermediate roll 5, 6, 7, 8, which are arranged together in a plane inclined to the horizontal stacking plane S on a bottom 9 of a stand 10. The at least one intermediate roller 5, 6, 7, 8 is mounted on a lever 10, 12, 13, 14 held on the stand 10. In the open position of the roll stack 2, the in Fig. 2 is shown, the at least one intermediate roller 5, 6, 7, 8 as a hanging on the associated lever 11, 12, 13, 14 suspended weight body hanging down freely on the stand 10.

Die mindestens eine Zwischenwalze 5, 6, 7, 8 wird vorzugsweise von einem vertikal aufgehängten Hebel 11, 12, 13, 14 getragen.The at least one intermediate roller 5, 6, 7, 8 is preferably supported by a vertically suspended lever 11, 12, 13, 14.

Bei dem in den Figuren 1 und 2 dargestellten ersten Ausführungsbeispiel eines Kalanders sind mehrere Zwischenwalzen 5, 6, 7, 8 mit zugeordneten Hebeln 11, 12, 13, 14 vorgesehen, wobei die Anzahl der Zwischenwalzen wählbar ist. Hier sind beispielsweise vier Zwischenwalzen 5, 6, 7, 8 vorgesehen. Der Walzenstapel 2 ist somit ein 6-Walzen-Stapel, der für eine zweiseitige Behandlung einer Warenbahn vorgesehen sein kann. Der Walzenstapel 2 umfaßt vorzugsweise harte und weiche Walzen zur Ausbildung von Soft-Nips. Zur Ausbildung eines Wechselspalts können ferner zwei benachbarte Zwischenwalzen 6, 7 als weiche Walzen ausgebildet sein.In the in the FIGS. 1 and 2 shown first embodiment of a calender several intermediate rollers 5, 6, 7, 8 are provided with associated levers 11, 12, 13, 14, wherein the number of intermediate rollers is selectable. Here, for example, four intermediate rollers 5, 6, 7, 8 are provided. The roll stack 2 is thus a 6-roll stack, which can be provided for a two-sided treatment of a web. The roll stack 2 preferably comprises hard and soft rolls for forming soft nips. To form an exchange gap, two adjacent intermediate rolls 6, 7 can furthermore be formed as soft rolls.

Der dargestellte Kalander weist einen Ständer 10 auf, der sich unter einem Winkel von etwa 45° zu einer horizontalen Stellfläche H erstreckt. Kopfseitig ist der Ständer 10 über einen Längsträger 15 mit einer Stellflächen-Stütze 16 verbunden. Der Walzenstapel 2 hängt an der Unterseite 9 des Ständers 10, und zwar mit einer Stapelebene S in der geschlossenen Stellung des Walzenstapels 2, wie in Figur 1 dargestellt, die ebenfalls in einem Winkel von etwa 45° zu der horizontalen Stellfläche H verläuft. Alternativ kann die Stapelebene einen Steigungsgrad im Bereich von 40 bis 50° besitzen.The illustrated calender has a stand 10 which extends at an angle of about 45 ° to a horizontal footprint H. At the head end, the stand 10 is connected to a shelf support 16 via a longitudinal member 15. The roll stack 2 hangs on the underside 9 of the upright 10, with a stacking plane S in the closed position of the roll stack 2, as in FIG FIG. 1 shown, which also extends at an angle of about 45 ° to the horizontal footprint H. Alternatively, the stack level may have a pitch in the range of 40 to 50 degrees.

Die obere Endwalze 3 und die untere Endwalze 4 sind in Halterungen 17, 18, insbesondere Geradführungen, gelagert, die am Ständer 10 befestigbar sind, und zwar vorzugsweise wahlweise gleitverschieblich. Von mindestens einem Ende ist der Walzenstapel 2 belastbar, wozu ein Hydraulikzylinder 19 vorgesehen ist, der hier auf die Halterung 18 der unteren Endwalze 4 wirkt und die Halterung 18 samt unterer Endwalze 4 in der Stapelebene S verschiebt. Die obere und untere Endwalze 3, 4 sind ferner vorzugsweise Biegeeinstellwalzen.The upper end roller 3 and the lower end roller 4 are mounted in brackets 17, 18, in particular linear guides, which can be fastened to the stand 10, preferably optionally slidable. From at least one end of the roll stack 2 can be loaded, including a hydraulic cylinder 19 is provided, which acts here on the holder 18 of the lower end roll 4 and the holder 18 together with the lower end roll 4 in the stacking plane S shifts. The upper and lower end rollers 3, 4 are also preferably bending adjusting rollers.

Die Mittelwalzen 5, 6, 7, 8 sind mit ihren Lagern an zugehörigen Hebeln 11, 12, 13, 14 befestigt, die um Schwenkachsen 20, 21, 22, 23 am Ständer 10 direkt oder an zugehörigen Halterungen 24, 25, 26, 27, die am Ständer 10 befestigbar sind, wie in Figur 2 dargestellt, schwenkbar sind. Die Zwischenwalzen 5, 6, 7, 8 sind an dem zugehörigen Hebel 11, 12, 13, 14 nach unten hängend gehalten, wozu die Hebel 11, 12, 13, 14 einarmig oder zweiarmig ausbildbar sind. Hier sind die Hebel 11, 12, 13, 14 zweiarmig ausgebildet, um die Hebel 11, 12, 13, 14 über Schwenkachsen 20, 21, 22, 23 an den Halterungen 24, 25, 26, 27 aufzuhängen. Der Schwenkbogen kann dann eng ausgebildet werden. Die Hebel 11, 12, 13, 14 sind bei mehreren Zwischenwalzen 5, 6, 7, 8 derart zueinander beabstandet am Ständer 10 gehalten, daß in der geschlossenen Stellung des Walzenstapels 2 alle Zwischenwalzen frei nach unten hängen und dabei vorzugsweise vertikal aufgehängt getragen sind. Mittels der Halterungen 24, 25, 26, 27 sind die an den Hebeln 11, 12, 13, 14 hängenden Zwischenwalzen 5, 6, 7, 8 zueinander positionierbar am Ständer 10 befestigt, so daß für jeden Walzendurchmesser einer Zwischenwalze 5, 6, 7, 8 für die frei nach unten hängenden Zwischenwalzen ein Schließen des Walzenstapels einstellbar istThe center rollers 5, 6, 7, 8 are mounted with their bearings on the associated levers 11, 12, 13, 14, about pivot axes 20, 21, 22, 23 on the stand 10 directly or to associated brackets 24, 25, 26, 27th , which are fastened to the stand 10, as in FIG. 2 shown, are pivotable. The intermediate rollers 5, 6, 7, 8 are held on the associated lever 11, 12, 13, 14 hanging down, to which the levers 11, 12, 13, 14 are formed with one arm or two arms. Here, the levers 11, 12, 13, 14 are formed with two arms to hang the levers 11, 12, 13, 14 via pivot axes 20, 21, 22, 23 to the brackets 24, 25, 26, 27. The swing arch can then be made tight. The levers 11, 12, 13, 14 are held at a plurality of intermediate rollers 5, 6, 7, 8 spaced from each other on the stand 10, that in the closed position of the roller stack 2 all intermediate rollers hang freely down and are preferably supported vertically suspended. By means of the holders 24, 25, 26, 27, the intermediate rollers 5, 6, 7, 8 suspended from the levers 11, 12, 13, 14 are fastened to each other in a positionable manner on the stand 10, so that for each roller diameter of an intermediate roller 5, 6, 7 , 8 for the freely downwardly suspended intermediate rollers closing the roll stack is adjustable

Die Hebel 11, 12, 13, 14 sind durch Kraftgeber in Form von Kolben-Zylinder-Einheiten 28, 29, 30, 31 belastbar. Bei der hier vorgesehenen zweiarmigen Ausbildung der Hebel 11, 12, 13, 14 greifen die Kraftgeber 28, 29, 30, 31 an dem den Gewichtskörper der Zwischenwalze tragenden Ende gegenüberliegenden Ende an.The levers 11, 12, 13, 14 can be loaded by force transmitters in the form of piston-cylinder units 28, 29, 30, 31. In the two-armed design of the levers 11, 12, 13, 14 provided here, the force transmitters 28, 29, 30, 31 engage opposite ends at the end carrying the weight body of the intermediate roll.

Für eine Schnelltrennung ist vorgesehen, daß die Hebel 11, 12, 13, 14 verlängerbar sind, wozu Zylindereinheiten vorgesehen sein können. Wie in Figur 2 dargestellt, ist eine Verlängerbarkeit vorgesehen, wenn mehr als eine Zwischenwalze 5, 6, 7, 8 vorgesehen sind. Werden die Hebel 11, 12, 13, 14 der Zwischenwalzen 5, 6, 7, 8 unterschiedlich lang gewählt, dann wird der Walzen-stapel getrennt, durch versetzt nach unten hängende Mittelwalzen 5, 6, 7, 8, wenn die Endwalzen 3, 4 nach außen verschoben werden. Die Bewegungsrichtungen sind durch Pfeile angedeutet.For a quick separation it is provided that the levers 11, 12, 13, 14 can be extended, for which purpose cylinder units can be provided. As in FIG. 2 shown, an extensibility is provided when more than one intermediate roll 5, 6, 7, 8 are provided. If the levers 11, 12, 13, 14 of the intermediate rolls 5, 6, 7, 8 are chosen to be of different lengths, then the roll stack is separated by offset downwardly depending center rolls 5, 6, 7, 8, when the end rolls 3, 4 are moved to the outside. The directions of movement are indicated by arrows.

Die den Walzenstapel 2 aufbauenden Walzen 3 bis 8 können alle voneinander abweichende Walzendurchmesser besitzen. Die Walzendurchmesser der Zwischenwalzen 5, 6, 7, 8 sind dabei vorzugsweise kleiner als die Walzendurchmesser der Endwalzen 3, 4. Bei mehreren Zwischenwalzen 5, 6, 7, 8 können alle Zwischenwalzen auch gleiche Walzendurchmesser aufweisen.The rolls 3 to 8 constituting the roll stack 2 can have all different roll diameters. The roll diameters of the intermediate rolls 5, 6, 7, 8 are preferably smaller than the roll diameters of the end rolls 3, 4. In the case of several intermediate rolls 5, 6, 7, 8, all intermediate rolls may also have the same roll diameters.

Alle Walzen 3, 4, 5, 6, 7, 8 sind weiterhin vorzugsweise mit einem eigenen Leistungsantrieb 32, 33, 34, 35, 36, 37 versehen.All rolls 3, 4, 5, 6, 7, 8 are furthermore preferably provided with their own power drive 32, 33, 34, 35, 36, 37.

Die Zwischenwalzen 6, 7 können als weiche Walzen ausgebildet sein zur Ausbildung eines Wechselspalts.The intermediate rolls 6, 7 may be formed as soft rolls to form an exchange gap.

Alternativ zu einem Walzenstapel mit einem Wechselspalt können zur zweiseitigen Behandlung einer Papierbahn auch zwei Walzenstapel mit einer wählbaren Anzahl von Walzen vorgesehen sein. Bevorzugt sind Walzenstapel mit jeweils drei bis fünf Walzen und Soft-Nips.As an alternative to a roll stack with an interchangeable gap, it is also possible to provide two roll stacks with a selectable number of rolls for two-sided treatment of a paper web. Preference is given to roll stacks of three to five rolls each and soft nips.

Zur Führung einer Warenbahn zwischen den Nips des Walzenstapels 2 können bekannte außen liegende Leitmittel Verwendung finden.To guide a web between the nips of the roll stack 2 known outside guiding means can be used.

Das in den Figuren 3 und 4 dargestellte zweite Ausführungsbeispiel unterscheidet sich von dem zu den Figuren 1 und 2 beschriebenen Ausführungsbeispiel dadurch, daß die aufgehängten Zwischenwalzen 5, 6, 7, 8 in einem vertikal hängenden Zustand mit Abstand zueinander positioniert sind. Der Abstand kann zur Bestimmung einer Nip-Öffnungsweite wählbar sein. Die Zwischenwalzen 5, 6, 7, 8 hängen dazu vorzugsweise an Hebeln 51, 52, 53, 54, die einarmig sind und mit im Ständer 10 vorgesehenen Schwenkachsen 20, 21, 22, 23 angelenkt sind. Unter dem Eigengewicht der Gewichtskörper der Zwischenwalzen 5, 6, 7, 8 hängen die Hebel 51, 52, 53, 54 mit den Zwischenwalzen 5, 6, 7, 8 als Kopflast frei nach unten.That in the Figures 3 and 4 illustrated second embodiment differs from that of the FIGS. 1 and 2 described embodiment in that the suspended intermediate rollers 5, 6, 7, 8 are positioned in a vertically suspended state at a distance from each other. The distance may be selectable for determining a nip opening width. For this purpose, the intermediate rollers 5, 6, 7, 8 preferably hang on levers 51, 52, 53, 54, which are in one arm and are articulated with swivel axles 20, 21, 22, 23 provided in the upright 10. Under the weight of the weight body of the intermediate rolls 5, 6, 7, 8, the levers 51, 52, 53, 54 hang freely with the intermediate rollers 5, 6, 7, 8 as a head load down.

An jedem Hebel 51, 52, 53, 54 greift ein Kraftgeber 28, 29, 30, 31 an, über den ein jeder Hebel 51, 52, 53, 54 schwenkbar ist, um die Zwischenwalzen 5, 6, 7, 8 derart gegeneinander zu verschwenken, daß der Walzenstapel 2 in der Stapelebene S geschlossen wird, wie dies in Figur 4 dargestellt ist. Pfeile verdeutlichen die Bewegungsrichtungen.At each lever 51, 52, 53, 54 engages a force transmitter 28, 29, 30, 31, via which each lever 51, 52, 53, 54 is pivotable about the intermediate rollers 5, 6, 7, 8 against each other pivot, that the roll stack 2 is closed in the stacking plane S, as in FIG. 4 is shown. Arrows illustrate the directions of movement.

Anschläge 55, 56, 57 können vorgesehen sein, um ein Pendeln der ausgeschwenkten Zwischenwalzen 6, 7, 8 beim Öffnen des Walzenstapels 2 zu vermeiden.Stops 55, 56, 57 may be provided to prevent oscillation of the swung-intermediate rolls 6, 7, 8 when opening the roll stack 2.

Im übrigen gelten die Ausführungen zum ersten Ausführungsbeispiel hier entsprechend. Moreover, the comments on the first embodiment apply here accordingly.

Claims (16)

  1. Calender for the treatment of a product web, in particular a paper web, having at least one roll stack (2) which can be adjusted between an opened and closed position and comprising in each case an upper (3) and a lower end roll (4) and at least one intermediate roll (5, 6, 7, 8), which are jointly arranged in a stack plane (S) inclined with respect to the horizontal on the underside (9) of a stand (10), the at least one intermediate roll (5, 6, 7, 8) being mounted on a lever (11, 12, 13, 14; 51, 52, 53, 54) held on the stand (10) and, in the opened position, the at least one intermediate roll (5, 6, 7, 8) being held freely hanging downwards on the stand (10) as a weighty body suspended on the associated lever (11, 12, 13, 14; 51, 52, 53, 54), characterized in that the at least one intermediate roll (5, 6, 7, 8) is carried by a vertically suspended lever (11, 12, 13, 14; 51, 52, 53, 54), at least in the opened position of the roll stack (2).
  2. Calender according to claim 1, characterized in that the at least one intermediate roll (5, 6, 7, 8) is held at one end of a lever arm that can be extended and belongs to a two-armed lever (11, 12, 13, 14).
  3. Calender according to claim 1 or 2, characterized in that a plurality of intermediate rolls (5, 6, 7, 8) are provided held suspended on the stand (10).
  4. Calender according to claim 3, characterized in that the intermediate rolls (5, 6, 7, 8) are suspended at a distance from one another in such a way that, in the closed position of the roll stack (2), all the intermediate rolls (5, 6, 7, 8) are carried by a vertically suspended lever (11, 12, 13, 14).
  5. Calender according to claim 4, characterized in that intermediate rolls (6, 7, 8) are carried by levers (11, 12, 13, 14) that can be extended differently.
  6. Calender according to one of claims 3 to 5, characterized in that the intermediate rolls (5, 6, 7, 8) are carried by associated two-armed levers (11, 12, 13, 14) which are mounted on mountings (24, 25, 26, 27) that can be fixed to the stand (10).
  7. Calender according to claim 3, characterized in that, in the opened position of the roll stack (2), the suspended intermediate rolls (5, 6, 7, 8) in a vertically suspended state of the associated levers (51, 52, 53, 54) are positioned at a distance from one another which can be selected in order to determine a nip opening width.
  8. Calender according to claim 7, characterized in that the levers (51, 52, 53, 54) carrying the intermediate rolls (5, 6, 7, 8) can be pivoted out in stages in order to position the intermediate rolls (5, 6, 7, 8) in the stack plane (S) when the nips are closed.
  9. Calender according to one of claims 1 to 8, characterized in that each intermediate roll (5, 6, 7, 8) is carried by a lever (11, 12, 13, 14; 51, 52, 53, 54) via which forces from a force generator (28, 29, 30, 31) can be introduced.
  10. Calender according to one of claims 1 to 9, characterized in that the stack plane (S) has a slope angle of 40 to 50° with respect to the horizontal (H).
  11. Calender according to one of claims 1 to 10, characterized in that each intermediate roll (5, 6, 7, 8) is carried by a lever (11, 12, 13, 14; 51, 52, 53, 54) which, in the closed and/or opened position of the roll stack (2) is at an acute angle to the stack plane (S).
  12. Calender according to one of claims 1 to 11, characterized in that the end rolls (3, 4) are constructed as controlled deflection rolls.
  13. Calender according to one of claims 1 to 12, characterized in that all the rolls (3, 4, 5, 6, 7, 8) have an individual power drive (33, 34, 35, 36).
  14. Calender according to one of claims 1 to 13, characterized in that the end rolls (3, 4) are mounted in a straight guide (17, 18) on the stand (10).
  15. Calender according to one of claims 1 to 14, characterized in that the rolls (3, 4, 5, 6, 7, 8) comprise hard and soft rolls in order to form working nips in the form of soft nips.
  16. Calender according to one of claims 1 to 15, characterized in that two of the intermediate rolls (6, 7) are constructed as soft rolls, which delimit a reversing nip.
EP05815437A 2005-04-12 2005-12-02 Calender Expired - Fee Related EP1883732B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510016781 DE102005016781B3 (en) 2005-04-12 2005-04-12 Calender, for finishing a paper web, has an angled roller stack on a column with intermediate rollers on levers suspended freely from the column as weights when in the open setting
PCT/EP2005/012923 WO2006108450A1 (en) 2005-04-12 2005-12-02 Calendar

Publications (2)

Publication Number Publication Date
EP1883732A1 EP1883732A1 (en) 2008-02-06
EP1883732B1 true EP1883732B1 (en) 2009-07-15

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EP05815437A Expired - Fee Related EP1883732B1 (en) 2005-04-12 2005-12-02 Calender

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EP (1) EP1883732B1 (en)
DE (2) DE102005016781B3 (en)
WO (1) WO2006108450A1 (en)

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DE102007012493A1 (en) * 2007-03-15 2008-09-18 Voith Patent Gmbh Press arrangement

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29521610U1 (en) * 1995-03-09 1997-11-20 Voith Sulzer Finishing Gmbh Calender for the treatment of a paper web
DE19904451B4 (en) * 1999-02-04 2005-06-30 Voith Paper Patent Gmbh Calender for sheet-like materials such as paper
DE10000543A1 (en) * 2000-01-08 2001-07-19 Voith Paper Patent Gmbh calender
DE10041651A1 (en) * 2000-08-24 2002-03-14 Voith Paper Patent Gmbh calender

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WO2006108450A1 (en) 2006-10-19
DE102005016781B3 (en) 2006-03-30
DE502005007729D1 (en) 2009-08-27
EP1883732A1 (en) 2008-02-06

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