EP0744492B1 - Calender - Google Patents

Calender Download PDF

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Publication number
EP0744492B1
EP0744492B1 EP96107755A EP96107755A EP0744492B1 EP 0744492 B1 EP0744492 B1 EP 0744492B1 EP 96107755 A EP96107755 A EP 96107755A EP 96107755 A EP96107755 A EP 96107755A EP 0744492 B1 EP0744492 B1 EP 0744492B1
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EP
European Patent Office
Prior art keywords
web
calender
partial
roll gap
winding
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EP96107755A
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German (de)
French (fr)
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EP0744492A1 (en
Inventor
Franz Kayser
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Voith Sulzer Finishing GmbH
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Voith Sulzer Finishing GmbH
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21GCALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00Calenders; Smoothing apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00Winding webs
    • B65H18/08Web-winding mechanisms
    • B65H18/14Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web
    • B65H18/20Mechanisms in which power is applied to web roll, e.g. to effect continuous advancement of web the web roll being supported on two parallel rollers at least one of which is driven
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/41Winding, unwinding
    • B65H2301/414Winding
    • B65H2301/4148Winding slitting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/40Shafts, cylinders, drums, spindles
    • B65H2404/42Arrangement of pairs of drums
    • B65H2404/421Bed arrangement, i.e. involving parallel and spaced drums, e.g. arranged horizontally for supporting a roll to be wound or unwound
    • B65H2404/4213Bed arrangement, i.e. involving parallel and spaced drums, e.g. arranged horizontally for supporting a roll to be wound or unwound the drums having different diameter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10Size; Dimensions
    • B65H2511/13Thickness
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00Physical entities not provided for in groups B65H2511/00 or B65H2513/00

Definitions

  • the invention relates to a calender for treatment a web according to the preamble of claims 1 and 2.
  • a calender of the generic type is already Kind known (DE-OS 21 19 963), in which between the last nip and the winder there is at least one slitter.
  • the between the unwinder and the winder arranged working units are with drives equipped, which together with the settlement and Rewinding will be regulated and a synchronous run guarantee.
  • the train is loaded much less because of a Winding process at the exit of the calender and an unwinding process at the entrance to the slitter rewinder.
  • the web material can therefore be subjected to greater stress become.
  • the invention is based, with one Calenders of the type described in the introduction the winding quality to improve the partial web roles.
  • a calender forms a system with a large number of possible influences on the web to be treated.
  • Measuring devices for the partial web roll diameters are preferred and / or the tensile stresses of the Partial webs that serve as parameters are provided. At Taking these parameters into account results in a special good winding quality.
  • the invention proposal is special important because the web before going in the first Nip occurs, already a winding process on End of the paper machine and an unwinding process on Was subjected to the entrance of the calender. It will therefore ensured that this strain on the web only once occurs.
  • An automatic web feed device is advantageous. Such a device is under the name “Flying Splice” known. This allows one automatic roll change at the calender entrance.
  • Each winding station is advantageous with an automatic Provide winding tube changer. Whenever a partial roll reaches its maximum diameter a new winding tube is automatically fed in, so that the new sub-roll without interrupting the calender operation can be built.
  • the calender illustrated in Fig. 1 has one Roll stack 1, which consists of eight rolls, namely a heatable, deflection-controllable hard Top roller 2, a soft roller 3, a heatable hard roller 4, a soft roller 5, a soft Roller 6, a heatable hard roller 7, a soft one Roller 8 and a heated, deflection controllable hard bottom roller 9. Result in this way six working columns 10 to 15, each by one hard roller and a soft roller are limited, and an interchangeable nip 16 formed by two soft rollers 5 and 6 is limited.
  • a paper web 17 is taken from an unwinder 18 fed, passes under the leadership of idlers 19 the working column 10 to 12, the alternating gap 16 and the working columns 13 to 15, whereupon they are in a Winding device 20 is wound.
  • the three Upper paper columns 10 to 12 is the paper web with one side, in the three lower working columns 13 to 15 with the other side on the hard rollers so that the desired surface structure on both sides, for example gloss or smoothness is achieved.
  • the unwinding device connected to a flying splice system 18 is, as is well known, only as Box shown.
  • At least one of the rollers 2 to 9 has its own Drive 21. In many cases, however, it is advisable to provide all rollers with such a drive, for example if there is an automatic feeding of the paper web is desirable.
  • the rotating cutting knife 33 and 34 has which sit on a common axis 35 and through one Motor 36 are driven. This will make the paper web 17, which is a width of, for example, 8 or 10 m can have, in individual partial webs 17a, 17b, 17c ... divided.
  • winder 37 which is a number of winding stations 37a, 37b, 37c ... which corresponds to the number of partial webs 17a, 17b, 17c ...
  • a central roller is common to all winding stations 38, which has a drive device 39.
  • each winding station has a support roller 40a, 40b, 40c ... each with its own drive device 41 are provided. If a winding tube 42 of up in the gap between the central roller 38 and support roller 40a lowered and through the rotating surface of the two rollers is rotated, it takes a partial web and forms a partial web roll 43a. The same applies to the partial web rollers 43b, 43c, ...
  • Each partial web 17a ... is a measuring device 44 for Measurement of the tensile stress assigned to the partial web.
  • everyone Part web roll 43a ... is a measuring device 45 for Measurement of the roll diameter assigned.
  • the measured values are processed in a second control device 46, which adjusts the drives 39 and 41 such that the peripheral speed of the central roller 38 approximately is equal to the web speed in the calender, while corrections required for each partial web roll 43a by the drive device 41 of the support rollers he follows. Is the peripheral speed of the support roller 40a larger than that of the central roller 38 a harder wrap, it is less, a softer one Wrap.
  • control device 46 with the control device 31 via a signal path 47 connected.
  • control device 46 48 additional data for the Winding process of interest are fed for example the thickness of the web or its moisture.
  • the control device 23 is able due to the supplied information the calender function in such a way to influence that the last nip 15th leaving paper web 17 largely the optimal Corresponds to winding conditions and therefore little or no To make interventions in the area of the winding device 37 are. In many cases, therefore, one can do not use individual regulation of the support rollers 40a ... and provide continuous support rollers. In particular with different zones of influence the paper web 17 in the calender can be reached that the partial webs 17a ... kept so even are that the same winding drive is used for all can be.
  • winding devices can also be used where the Winding sleeve is mounted and driven. It is also possible to use the calender in inline mode.

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  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Lubricants (AREA)

Abstract

A calender for treating a web of material includes at least two rollers forming a roller nip therebetween. A take-up device is disposed downstream from the at least two rollers. At least one longitudinal cutter is disposed between the at least two rollers and the take-up device. The at least one longitudinal cutter divides the web of material into at least two partial webs. The take-up device has at least two winding stations. Each of the winding stations corresponds to one of the partial webs.

Description

Die Erfindung bezieht sich auf einen Kalander zum Behandeln einer Bahn nach dem Oberbegriff der Ansprüche 1 und 2.The invention relates to a calender for treatment a web according to the preamble of claims 1 and 2.

Bei einem Kalander, wie er aus dem Prospekt "Die neuen Superkalander-Konzepte" der Firma Sulzer Papertec aus 1994 (Kennziffer 05/94 d) bekannt ist, wird die kalandrierte Bahn in der Aufwickelvorrichtung zu einer Rolle geformt, deren axiale Länge der Breite der Bahn entspricht. Bei langen Rollen macht es erhebliche Schwierigkeiten, einen gleichmäßigen Wickel zu erzeugen. Es gibt daher zahlreiche Vorschläge, die Aufwikkelvorrichtung mit Zusatzvorrichtungen zu versehen, die das Wickelergebnis verbessern sollen.With a calender, as described in the brochure "The new Supercalender concepts "from Sulzer Papertec 1994 (code 05/94 d) is known, the calendered Roll into a reel in the winder shaped, the axial length of which corresponds to the width of the web. With long rolls it makes significant Difficulty creating an even wrap. There are therefore numerous proposals for the winding device to be provided with additional devices which should improve the winding result.

Während es zum Behandeln einer Bahn rationeller ist, mit großer Bahnbreite zu arbeiten, werden in der Praxis, z.B. in einer Druckerei, wesentlich geringere Bahnbreiten benötigt. Daher gibt es Rollenschneidmaschinen, die die breite Bahn mit Hilfe von Längsschneidern in einzelne Teilbahnen aufteilen und diese je für sich in einer Wickelstation zu einer Rolle mit geringerer Breite formen. While it's more rational to treat a web, In practice, working with a wide web width e.g. in a print shop, much less Web widths required. So there are slitter reels the wide web with the help of slitters divide into individual sections and each for in a winding station to a roll with less Shape wide.

Aus diesem Grund ist bereits ein Kalander der gattungsgemäßen Art bekannt (DE-OS 21 19 963), bei dem zwischen dem letzten Walzenspalt und der Aufwickelvorrichtung mindestens ein Längsschneider vorhanden ist. Die zwischen der Abwickelvorrichtung und der Aufwickelvorrichtung angeordneten Arbeitsaggregate sind mit Antrieben ausgerüstet, welche gemeinsam mit der Abwicklung und Aufwicklung geregelt werden und einen synchronen Lauf gewährleisten.For this reason, a calender of the generic type is already Kind known (DE-OS 21 19 963), in which between the last nip and the winder there is at least one slitter. The between the unwinder and the winder arranged working units are with drives equipped, which together with the settlement and Rewinding will be regulated and a synchronous run guarantee.

Bei dieser Konstruktion wird die an der Kalander-Aufwickelvorrichtung bisher erzeugte breite Rolle durch mehrere schmalere Rollen ersetzt. Allein diese Verringerung der Breite bringt bereits eine erhebliche Verbesserung der Wickelqualität. Denn in aller Regel sind Differenzen von die Wickelqualität beeinflussenden Bahnparametern bei schmaleren Rollen geringer als bei breiteren Rollen, weil das Rollengewicht kleiner und die Durchbiegung der Rolle aufgrund einer kürzeren Achse geringer ist.With this construction, the calender rewinder previously generated broad role replaced several narrower roles. This reduction alone the breadth already brings a considerable improvement the winding quality. Because usually are Differences affecting the winding quality Path parameters for narrower rolls less than for wider rolls because the roll weight is smaller and the deflection of the roller due to a shorter axis is less.

Die Bahn wird wesentlich weniger belastet, weil ein Aufwickelvorgang am Ausgang des Kalanders und ein Abwickelvorgang am Eingang der Rollenschneidmaschine entfallen. Das Bahnmaterial kann daher stärker beansprucht werden.The train is loaded much less because of a Winding process at the exit of the calender and an unwinding process at the entrance to the slitter rewinder. The web material can therefore be subjected to greater stress become.

Durch den Fortfall einer gesonderten Rollenschneidmaschine ergeben sich auch geringere Herstellungskosten und ein verminderter Platzbedarf. Darüber hinaus entfallen Transporte vom Kalander zur Rollenschneidmaschine, was wiederum Personaleinsparungen ermöglicht. Der Papierausschuß, der sich beim Einziehen von Papierbahnen durch die jeweilige Maschine ergibt, wird etwa halbiert. Die Schneid- und Aufwickelgeschwindigkeit kann herabgesetzt und damit die Lebensdauer der Wickelmaschine und der Schneidmesser erhöht werden, weil die Verzögerungen, die sich bisher wegen der Diskontinuität des Schneidvorganges ergaben, nicht mehr aufgeholt werden müssen.By eliminating a separate slitter winder there are also lower manufacturing costs and a reduced space requirement. Beyond that Transport from the calender to the winder, which in turn enables personnel savings. The Waste paper, which occurs when feeding paper webs results from the respective machine is cut in half. The cutting and winding speed can reduced and thus the life of the winding machine and the cutting knife can be increased because of that Delays so far due to discontinuity of the cutting process, can no longer be made up have to.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Kalander der eingangs beschriebenen Art die Wickelqualität der Teilbahn-Rollen zu verbessern.The invention is based, with one Calenders of the type described in the introduction the winding quality to improve the partial web roles.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Durch die Korrekturen der Umfangsgeschwindigkeit wird das Wickelergebnis (weiter) verbessert.This object is achieved by the features of claim 1 solved. By correcting the peripheral speed the winding result (continue) improved.

Eine zweite Lösung der gestellten Aufgabe ergibt sich aus den Merkmalen des Anspruchs 2.A second solution to the problem arises from the features of claim 2.

Ein Kalander bildet ein System mit sehr vielen Einwirkungsmöglichkeiten auf die zu behandelnde Bahn. Hierbei kann man die gleiche Eigenschaft mit unterschiedlichen Kombinationen der Kalanderfunktionen erreichen, beispielsweise wenn man eine geringere Druckspannung im Walzenspalt durch eine höhere Temperatur ersetzt. Es bereitet daher auch keine Schwierigkeiten, eine zusätzliche Abhängigkeit einzuführen, welche für eine höhere Gleichmäßigkeit im Wickel sorgt.A calender forms a system with a large number of possible influences on the web to be treated. Here you can have the same property with different Achieve combinations of the calendar functions, for example if you have a lower compressive stress in the Roll nip replaced by a higher temperature. It therefore does not cause any difficulties, an additional Introduce dependency, which for a higher Uniformity in the wrap ensures.

Unter Berücksichtigung der individuell anzusteuernden Zonen läßt sich für jeden einzelnen Teilwickel die optimale Wickelqualtiät erzielen.Taking into account the individually controllable Zones can be optimal for each individual sub-wrap Achieve winding quality.

Günstig ist es auch, daß bei Verwendung eines vertikalen Walzenstapels die zusätzliche Beeinflussung der Kalanderfunktionen überwiegend im Bereich des untersten Walzenspalts erfolgt. Zum einen hat die Beeinflussung vor, im oder nach dem untersten Walzenspalt die größte Wirkung, weil es sich um den Bereich am Kalanderausgang handelt. Zum andern sind für die Wickelqualität besonders maßgebende Dickenkorrekturen besonders leicht durch die Unterwalze, ggf. im Zusammenwirken mit der Oberwalze, durchzuführen, weil im untersten Walzenspalt wegen des Gewichts der darüber befindlichen Walzen die höchste Druckspannung herrscht.It is also favorable that when using a vertical Roller stack the additional influence of the Calender functions mainly in the area of the lowest Roll nip occurs. On the one hand has the influence the largest before, in or after the lowest nip Effect because it is the area at the calender exit acts. On the other hand, are special for the winding quality decisive thickness corrections are particularly easy through the lower roller, possibly in cooperation with the Top roller to perform because in the lowest nip because of the weight of the rollers above it the highest compressive stress prevails.

Vorzugsweise sind Meßvorrichtungen für die TeilbahnRollen-Durchmesser und/oder die Zugspannungen der Teilbahnen, die als Parameter dienen, vorgesehen. Bei Berücksichtigung dieser Parameter ergibt sich eine besonders gute Wickelqualität.Measuring devices for the partial web roll diameters are preferred and / or the tensile stresses of the Partial webs that serve as parameters are provided. At Taking these parameters into account results in a special good winding quality.

Wenn der Kalander eine den Walzenspalten vorgeschaltete Abwickelvorrichtung besitzt, der Kalander also im Offline-Betrieb arbeitet, ist der Erfindungsvorschlag besonders wichtig, weil die Bahn, bevor sie in den ersten Walzenspalt eintritt, schon einem Aufwickelvorgang am Ende der Papiermaschine und einem Abwickelvorgang am Eingang des Kalanders unterworfen war. Es wird daher dafür gesorgt, daß diese Belastung der Bahn nur einmal auftritt.If the calender upstream of the nips Unwinding device has, so the calender in offline mode works, the invention proposal is special important because the web before going in the first Nip occurs, already a winding process on End of the paper machine and an unwinding process on Was subjected to the entrance of the calender. It will therefore ensured that this strain on the web only once occurs.

Von Vorteil ist eine automatische Bahneinzugsvorrichtung. Eine solche Vorrichtung ist unter der Bezeichnung "Flying Splice" bekannt. Dies erlaubt einen automatischen Rollenwechsel am Kalandereingang.An automatic web feed device is advantageous. Such a device is under the name "Flying Splice" known. This allows one automatic roll change at the calender entrance.

Mit Vorteil ist jede Wickelstation mit einem automatischen Wickelhülsenwechsler versehen. Immer dann, wenn eine Teilrolle ihren maximalen Durchmesser erreicht hat, wird automatisch eine neue Wickelhülse zugeführt, so daß die neue Teilrolle ohne Unterbrechung des Kalanderbetriebs aufgebaut werden kann.Each winding station is advantageous with an automatic Provide winding tube changer. Whenever a partial roll reaches its maximum diameter a new winding tube is automatically fed in, so that the new sub-roll without interrupting the calender operation can be built.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten, bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine schematische Darstellung eines erfindungsgemäßen Kalanders und
Fig. 2
eine schematische Draufsicht auf den Schneidund Aufwickelbereich des Kalanders.
The invention is explained below with reference to a preferred embodiment shown in the drawing. Show it:
Fig. 1
a schematic representation of a calender according to the invention and
Fig. 2
a schematic plan view of the cutting and winding area of the calender.

Der in Fig. 1 veranschaulichte Kalander weist einen Walzenstapel 1 auf, der aus acht Walzen besteht, nämlich einer beheizbaren, durchbiegungssteuerbaren harten Oberwalze 2, einer weichen Walze 3, einer beheizbaren harten Walze 4, einer weichen Walze 5, einer weichen Walze 6, einer beheizbaren harten Walze 7, einer weichen Walze 8 und einer beheizbaren, durchbiegungssteuerbaren harten Unterwalze 9. Auf diese Weise ergeben sich sechs Arbeitsspalte 10 bis 15, die je durch eine harte Walze und eine weiche Walze begrenzt sind, und ein Wechselspalt 16, der durch zwei weiche Walzen 5 und 6 begrenzt ist.The calender illustrated in Fig. 1 has one Roll stack 1, which consists of eight rolls, namely a heatable, deflection-controllable hard Top roller 2, a soft roller 3, a heatable hard roller 4, a soft roller 5, a soft Roller 6, a heatable hard roller 7, a soft one Roller 8 and a heated, deflection controllable hard bottom roller 9. Result in this way six working columns 10 to 15, each by one hard roller and a soft roller are limited, and an interchangeable nip 16 formed by two soft rollers 5 and 6 is limited.

Eine Papierbahn 17 wird von einer Abwickelvorrichtung 18 zugeführt, durchläuft unter der Führung von Leitrollen 19 die Arbeitsspalte 10 bis 12, den Wechselspalt 16 und die Arbeitsspalte 13 bis 15, worauf sie in einer Wickelvorrichtung 20 aufgewickelt wird. In den drei oberen Arbeitsspalten 10 bis 12 liegt die Papierbahn mit der einen Seite, in den drei unteren Arbeitsspalten 13 bis 15 mit der anderen Seite an den harten Walzen an, so daß beidseitig die gewünschte Oberflächenstruktur, beispielsweise Glanz oder Glätte, erreicht wird. Die mit einem Flying-Splice-System verbundene Abwickelvorrichtung 18 ist, da allgemein bekannt, lediglich als Kästchen dargestellt.A paper web 17 is taken from an unwinder 18 fed, passes under the leadership of idlers 19 the working column 10 to 12, the alternating gap 16 and the working columns 13 to 15, whereupon they are in a Winding device 20 is wound. In the three Upper paper columns 10 to 12 is the paper web with one side, in the three lower working columns 13 to 15 with the other side on the hard rollers so that the desired surface structure on both sides, for example gloss or smoothness is achieved. The unwinding device connected to a flying splice system 18 is, as is well known, only as Box shown.

Zumindest eine der Walzen 2 bis 9 besitzt einen eigenen Antrieb 21. In vielen Fällen ist es jedoch zweckmäßig, alle Walzen mit einem solchen Antrieb zu versehen, beispielsweise wenn ein automatisches Einziehen der Papierbahn wünschenswert ist.At least one of the rollers 2 to 9 has its own Drive 21. In many cases, however, it is advisable to provide all rollers with such a drive, for example if there is an automatic feeding of the paper web is desirable.

Eine Steuervorrichtung 23 hat mehrere Funktionen:

  • a) Über eine Leitung 24 wird die Kraft P festgelegt, mit der die Oberwalze 2 nach unten gedrückt wird, wobei die Unterwalze 9 zweckmäßigerweise ortsfest gehalten ist. Die Belastung kann auch in umgekehrter Richtung erfolgen, wobei die Kraft P auf die Unterwalze 9 wirkt und die Oberwalze 2 ortsfest gelagert ist. Durch die Belastung ist auch die Druckspannung bestimmt, die in den einzelnen Arbeitsspalten 10 bis 15 herrscht. Diese Druckspannung nimmt von oben nach unten zu, weil sich zu der Belastungskraft P jeweils noch das wirksame Gewicht der einzelnen Walzen addiert.
  • b) Über die Leitungen 25 und 26 werden die Vorrichtungen 27 bzw. 28 zum Durchbiegungsausgleich der Oberwalze 2 und der Unterwalze 9 mit Druckmittel beaufschlagt. Diese Vorrichtungen sorgen dafür, daß über die Länge der Walzen eine gleichmäßige Druckspannung herrscht, wie dies an sich bekannt ist. Hierfür können alle üblichen Vorrichtungen verwendet werden, insbesondere solche, bei denen Stützelemente nebeneinander in einer Reihe angeordnet sind und einzeln oder zonenweise mit unterschiedlichem Druck beaufschlagt werden können.
  • c) Die Walzen 2, 4, 7 und 9 sind beheizbar, wie dies durch Pfeile H angedeutet ist. Die Heizenergie wird über strichpunktierte Pfade 27 bis 30 zugeführt. Dies kann durch elektrische Beheizung, durch Strahlungsheizung, mit Hilfe eines Wärmeträgers u.dgl. erfolgen. Eine Schutzhaube 31 dient der Wärmeisolation und sorgt dafür, daß die in Folge der Beheizung abgestrahlte Wärme nur in geringem Maß in die Umgebung abgeführt wird. Nicht veranschaulicht ist es, daß auch weitere Kalanderfunktionen, wie Feuchte oder Bahngeschwindigkeit und damit Verweilzeit in den Walzenspalten, beeinflußt werden können.
  • A control device 23 has several functions:
  • a) The force P with which the upper roller 2 is pressed down is determined via a line 24, the lower roller 9 advantageously being held stationary. The loading can also take place in the opposite direction, the force P acting on the lower roller 9 and the upper roller 2 being mounted in a stationary manner. The compressive stress that prevails in the individual working columns 10 to 15 is also determined by the load. This compressive stress increases from top to bottom because the effective weight of the individual rollers is added to the loading force P.
  • b) Via lines 25 and 26, devices 27 and 28 for compensating for deflection of upper roller 2 and lower roller 9 are pressurized. These devices ensure that there is a uniform compressive stress over the length of the rollers, as is known per se. All conventional devices can be used for this, in particular those in which support elements are arranged next to one another in a row and can be subjected to different pressures individually or in zones.
  • c) The rollers 2, 4, 7 and 9 can be heated, as indicated by arrows H. The heating energy is supplied via dash-dotted paths 27 to 30. This can be done by electrical heating, by radiant heating, with the help of a heat transfer medium and the like. respectively. A protective hood 31 is used for thermal insulation and ensures that the heat radiated as a result of the heating is only dissipated to a small extent into the environment. It is not illustrated that other calender functions, such as moisture or web speed and thus the dwell time in the nips, can also be influenced.
  • Wenn die Papierbahn 17 den letzten Walzenspalt 15 verlassen hat, läuft sie durch einen Längsschneider 32, der rotierende Schneidmesser 33 und 34 aufweist, welche auf einer gemeinsamen Achse 35 sitzen und durch einen Motor 36 angetrieben werden. Hierdurch wird die Papierbahn 17, die eine Breite von beispielsweise 8 oder 10 m haben kann, in einzelne Teilbahnen 17a, 17b, 17c ... zerteilt. When the paper web 17 leave the last nip 15 it runs through a slitter 32, the rotating cutting knife 33 and 34 has which sit on a common axis 35 and through one Motor 36 are driven. This will make the paper web 17, which is a width of, for example, 8 or 10 m can have, in individual partial webs 17a, 17b, 17c ... divided.

    Es folgt eine Aufwickelvorrichtung 37, die eine Anzahl von Wickelstationen 37a, 37b, 37c ... aufweist, welche der Anzahl der Teilbahnen 17a, 17b, 17c ... entspricht. Allen Wickelstationen gemeinsam ist eine Zentralwalze 38, welche eine Antriebsvorrichtung 39 aufweist. Außerdem weist jede Wickelstation eine Abstützwalze 40a, 40b, 40c ... auf, die je mit einer eigenen Antriebsvorrichtung 41 versehen sind. Wenn eine Wickelhülse 42 von oben in den Spalt zwischen Zentralwalze 38 und Abstützwalze 40a abgesenkt und durch die rotierende Oberfläche der beiden Walzen in Drehung versetzt wird, nimmt sie eine Teilbahn auf und bildet eine Teilbahn-Rolle 43a. Ähnliches gilt für die Teilbahn-Rollen 43b, 43c, ...There follows a winder 37, which is a number of winding stations 37a, 37b, 37c ... which corresponds to the number of partial webs 17a, 17b, 17c ... A central roller is common to all winding stations 38, which has a drive device 39. Moreover each winding station has a support roller 40a, 40b, 40c ... each with its own drive device 41 are provided. If a winding tube 42 of up in the gap between the central roller 38 and support roller 40a lowered and through the rotating surface of the two rollers is rotated, it takes a partial web and forms a partial web roll 43a. The same applies to the partial web rollers 43b, 43c, ...

    Jeder Teilbahn 17a ... ist eine Meßvorrichtung 44 zur Messung der Zugspannung der Teilbahn zugeordnet. Jeder Teilbahn-Rolle 43a ... ist eine Meßvorrichtung 45 zur Messung des Rollendurchmessers zugeordnet. Die Meßwerte werden in einer zweiten Steuervorrichtung 46 verarbeitet, die die Antriebe 39 und 41 derart einstellt, daß die Umfangsgeschwindigkeit der Zentralwalze 38 etwa gleich der Bahngeschwindigkeit im Kalander ist, während für jede Teilbahnrolle 43a ... erforderliche Korrekturen durch die Antriebsvorrichtung 41 der Abstützrollen erfolgt. Ist die Umfangsgeschwindigkeit der Abstützrolle 40a größer als diejenige der Zentralwalze 38, ergibt sich ein härterer Wickel, ist sie geringer, ein weicherer Wickel.Each partial web 17a ... is a measuring device 44 for Measurement of the tensile stress assigned to the partial web. Everyone Part web roll 43a ... is a measuring device 45 for Measurement of the roll diameter assigned. The measured values are processed in a second control device 46, which adjusts the drives 39 and 41 such that the peripheral speed of the central roller 38 approximately is equal to the web speed in the calender, while corrections required for each partial web roll 43a by the drive device 41 of the support rollers he follows. Is the peripheral speed of the support roller 40a larger than that of the central roller 38 a harder wrap, it is less, a softer one Wrap.

    Stattdessen oder zusätzlich ist die Steuervorrichtung 46 mit der Steuervorrichtung 31 über einen Signalpfad 47 verbunden. Außerdem können der Steuervorrichtung 46 über weitere Eingänge 48 zusätzliche Daten, die für den Wickelvorgang von Interesse sind, zugeführt werden, beispielsweise die Dicke der Bahn oder deren Feuchte. Die Steuervorrichtung 23 ist in der Lage, aufgrund der zugeführten Informationen die Kalanderfunktion derart zu beeinflussen, daß die den letzten Walzenspalt 15 verlassende Papierbahn 17 weitgehend den optimalen Wickelbedingungen entspricht und daher keine oder kaum Eingriffe im Bereich der Aufwickelvorrichtung 37 vorzunehmen sind. In vielen Fällen kann man daher auf eine individuelle Regelung der Abstützwalzen 40a ... verzichten und durchgehende Abstützwalzen vorsehen. Insbesondere bei zonenweise unterschiedlicher Beeinflussung der Papierbahn 17 im Kalander läßt sich erreichen, daß die Teilbahnen 17a ... so gleichmäßig gehalten sind, daß für alle der gleiche Aufwickelantrieb verwendet werden kann.Instead or in addition, the control device 46 with the control device 31 via a signal path 47 connected. In addition, the control device 46 48 additional data for the Winding process of interest are fed for example the thickness of the web or its moisture. The control device 23 is able due to the supplied information the calender function in such a way to influence that the last nip 15th leaving paper web 17 largely the optimal Corresponds to winding conditions and therefore little or no To make interventions in the area of the winding device 37 are. In many cases, therefore, one can do not use individual regulation of the support rollers 40a ... and provide continuous support rollers. In particular with different zones of influence the paper web 17 in the calender can be reached that the partial webs 17a ... kept so even are that the same winding drive is used for all can be.

    Von der dargestellten Konstruktion kann in vielfacher Hinsicht abgewichen werden, ohne den Grundgedanken der Erfindung zu verlassen. Beispielsweise können auch Aufwickelvorrichtungen verwendet werden, bei denen die Wickelhülse gelagert und angetrieben ist. Es ist auch möglich, den Kalander im Inline-Betrieb zu verwenden.The construction shown can be in multiple Be deviated without regard to the basic idea of Leaving invention. For example, winding devices can also be used used where the Winding sleeve is mounted and driven. It is also possible to use the calender in inline mode.

    Claims (7)

    1. Calender for the treatment such as glazing or calendering of a web, in particular a paper web (17), with at least two rolls (2 to 9) forming a roll gap between them, at least one longitudinal cutter (32) for dividing the web into at least two partial webs (17a, 17b, 17c) and a wind-up device (37) comprising at least two winding stations (37a, 37b, 37c) each for a partial web (17a, 17b, 17c) and a drive which keeps the circumferential speed of the partial web rolls (43a, 43b, 43c) approximately equal to the web speed in the calender, wherein the at least one longitudinal cutter (32) is arranged between the last roll gap and the wind-up device (37), characterised in that measuring devices (44, 45) are provided for measuring parameters of the partial webs (17a, 17b, 17c) or of the partial web rolls (43a, 43b, 43c) and in that the winding stations (37a, 37b, 37c) each comprise their own drive device (41) with a control device (46) which in addition causes individual corrections of the circumferential speed as a function of said parameters.
    2. Calender for the treatment such as glazing or calendering of a web, in particular a paper web (17), with at least two rolls (2 to 9) forming a roll gap between them, at least one longitudinal cutter (32) for dividing the web into at least two partial webs (17a, 17b, 17c) and a wind-up device (37) comprising at least two winding stations (37a, 37b, 37c) each for a partial web (17a, 17b, 17c) and a drive which keeps the circumferential speed of the partial web rolls (43a, 43b, 43c) approximately equal to the web speed in the calender, wherein a control device (23) working in zones is provided for the calender functions such as compressive stress in the roll gap, dwell time in the roll gap, temperature or moisture, ensuring the desired properties of the web (17) such as smoothness or brightness, and wherein the at least one longitudinal cutter (32) is arranged between the last roll gap and the wind-up device (37) , characterised in that measuring devices (44, 45) are provided for measuring parameters of the partial webs (17a, 17b, 17c) or of the partial web rolls (43a, 43b, 43c) and in that the control device (23) controls the zones in addition individually as a function of said parameters.
    3. Calender according to claim 2, characterised in that when using a vertical roll stack (1) the additional control of calender functions takes place mainly in the region of the lowermost roll gap (15).
    4. Calender according to any of claims 1 to 3, characterised in that measuring devices (44, 45) are provided for the partial web roll diameters and/or the tensile stresses of the partial webs, which serve as parameters.
    5. Calender according to any of claims 1 to 4, characterised by a take-off device (18) mounted in front of the roll gaps (10 to 16).
    6. Calender according to any of claims 1 to 5, characterised by an automatic web feeder.
    7. Calender according to any of claims 1 to 6, characterised in that each winding station (37a, 37b, 37c) is provided with an automatic winding tube changer.
    EP96107755A 1995-05-24 1996-05-15 Calender Expired - Lifetime EP0744492B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19519011 1995-05-24
    DE19519011A DE19519011C2 (en) 1995-05-24 1995-05-24 calender

    Publications (2)

    Publication Number Publication Date
    EP0744492A1 EP0744492A1 (en) 1996-11-27
    EP0744492B1 true EP0744492B1 (en) 2000-01-19

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96107755A Expired - Lifetime EP0744492B1 (en) 1995-05-24 1996-05-15 Calender

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    US (1) US5771793A (en)
    EP (1) EP0744492B1 (en)
    JP (1) JPH08325981A (en)
    AT (1) ATE189018T1 (en)
    CA (1) CA2176641C (en)
    DE (3) DE19519011C2 (en)

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    Also Published As

    Publication number Publication date
    ATE189018T1 (en) 2000-02-15
    DE59604207D1 (en) 2000-02-24
    JPH08325981A (en) 1996-12-10
    US5771793A (en) 1998-06-30
    CA2176641A1 (en) 1996-11-25
    DE19519011C1 (en) 1996-05-15
    DE19519011C2 (en) 2001-02-01
    DE19549669C2 (en) 2002-10-10
    CA2176641C (en) 1999-03-30
    EP0744492A1 (en) 1996-11-27

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