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EP1314819B1 - Calandre et procédé pour le lissage de bandes de papier ou carton - Google Patents

Calandre et procédé pour le lissage de bandes de papier ou carton Download PDF

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Publication number
EP1314819B1
EP1314819B1 EP20020024341 EP02024341A EP1314819B1 EP 1314819 B1 EP1314819 B1 EP 1314819B1 EP 20020024341 EP20020024341 EP 20020024341 EP 02024341 A EP02024341 A EP 02024341A EP 1314819 B1 EP1314819 B1 EP 1314819B1
Authority
EP
European Patent Office
Prior art keywords
nip
belt
web
jacket
shell
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 - Lifetime
Application number
EP20020024341
Other languages
German (de)
English (en)
Other versions
EP1314819A3 (fr
EP1314819A2 (fr
Inventor
Rüdiger Dr. Kurtz
Josef Schneid
Thomas Hermsen
Udo Gabbusch
Harald Hess
Rainer Fenske
Alexander Wassermann
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.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1314819A2 publication Critical patent/EP1314819A2/fr
Publication of EP1314819A3 publication Critical patent/EP1314819A3/fr
Application granted granted Critical
Publication of EP1314819B1 publication Critical patent/EP1314819B1/fr
Anticipated expiration legal-status Critical
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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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature

Definitions

  • the invention relates to a calender for smoothing a paper or board web with a nip, which is formed between a heatable roll and a peripheral jacket, which is pressed against the roller under the action of a support shoe over a predetermined peripheral region. Furthermore, the invention relates to a method for smoothing a paper or board web, in which the web is passed through a nip formed between a heated roll and a circumferential jacket, which is pressed by means of a support shoe against the roll.
  • EP 0 973 972 B1 describes a method for calendering and a calender for carrying out the method, in which a material web is passed through a nip between a hard roll and a soft roll. On the side of the soft roll, a metal strip is additionally guided through the nip. The metal band can be heated.
  • a similar calender arrangement is known from WO 02/068755 A2.
  • a nip is formed by a thermo roll and the jacket of a deflection roll.
  • a band is guided, which is mounted at its two axial ends on front discs, which rotate about an axis which also receives the carrier on which the support elements of the deflection adjustment roller are mounted.
  • the band may be formed of metal.
  • the invention has for its object to smooth the web better.
  • the jacket can be designed in different ways.
  • One possibility is the use of a relatively stiff shell, which is elastic enough to adapt to the curvature of the roll, but otherwise rotates virtually in the manner of a roller.
  • This jacket can be provided with discs on the front side.
  • Another possibility is the use of a less rigid band, which is guided via support rollers in one circulation, wherein the deflection rollers practically define a polygon. Such a band can also be relatively thin.
  • the jacket which must be flexible enough to be convexly deformed when it contacts the roll, is usually made of a plastic material that has poor thermal conductivity and thermal loading required to heat through the jacket. has only a limited life.
  • the tape By using the tape, this problem can be avoided. It heats only the tape, so that although the web can be heated both by the roller and the belt, the jacket is heated but only by contact with the heated belt.
  • this embodiment has the advantage that the jacket of the shoe roll does not come into contact with the web and is less subject to wear.
  • the surface of the shell thus plays for the smoothing of the web virtually none Role. Rather, the decisive factor is the surface of the band, which faces the track.
  • smoothing is meant here a treatment which can also be called "satinage”.
  • the amount of heat introduced into the jacket is dissipated again by the cooling device, so that the temperature of the jacket can be kept in ranges even during prolonged operation. for which the material of the shell is designed. If the tape has at least two layers, of which a layer adjacent to the jacket is heat-insulating and a layer adjacent to the web is heat-conducting, the additional thermal loading of the web is combined with the protection of the jacket. The jacket is heated less.
  • the band is formed as a metal band. At least the surface of the metal strip which faces the web can then be made particularly smooth, so that the smoothness of the metal strip is impressed into the surface of the web. It is therefore possible in a nip to smooth the web on both sides with approximately the same surface properties.
  • a band heater is disposed in front of the nip.
  • the tape is thus heated immediately before entering the nip and then releases the absorbed heat in the nip to the web. This will be energy losses kept small and heating of the environment is largely avoided.
  • the cooling device is arranged behind the output of the nip.
  • the mantle In the nip, the mantle is first heated on its surface. If you cool the mantle already at the exit of the nip, then you can usually go out from a relatively high temperature at the surface. Cooling is more effective the greater the temperature difference. In addition, over most of its circulation the jacket has a temperature which is lower than that in the nip. This also extends the life.
  • the band is guided with a larger circulation than the jacket. Outside the nip so creates a distance between the band and the jacket, so that the mutual influence between the band and the jacket, for example, thermal type, outside the nip can be kept small. It is therefore possible to cool the jacket and leave the band at an elevated temperature without any adverse effect.
  • the band has a smoother surface than the shell. This reduces the demands on the jacket, but at the same time allows the web to be provided with a desired high smoothness even on its side facing the jacket.
  • the object is achieved in a method of the type mentioned in that a heated belt between the web and the jacket through the nip leading to cooling the jacket.
  • the required amounts of heat on the jacket-facing side of the web are rather registered on the tape in the nip.
  • Contact between the jacket and the web is avoided so that the jacket is less subject to wear.
  • the smoothing result can be influenced independently of the surface properties of the jacket.
  • heat is transferred to the belt shortly before entering the nip.
  • the heat losses are kept small. Virtually all of the heat transferred to the belt can act in the nip and be transferred to the web for the most part.
  • the tape is separated from the mantle outside the nip.
  • mutual influences between the jacket and the band are kept small. In particular, you can cool the jacket without having to cool the track at the same time.
  • a device 1 for smoothing a fibrous web that is to say a paper or board web 2 (hereinafter referred to as web) has a roller 3 which is heated by means of a heating device 4 shown schematically.
  • a heating device 4 shown schematically.
  • a heater acting from the outside on the surface of the roller 3 it is also possible to heat the roller 3 from the inside, for example with a hot liquid, such as water or oil, or with steam. From the outside, the heater 4 can act on the surface of the roller 3 with infrared rays or electric or magnetic fields.
  • the roller 3 cooperates with a jacket 5 of a shoe roller 6, which by means of a support member 7 against the roller 3 is pressed.
  • a support member 7 which guide the jacket 5.
  • the jacket 5 is therefore pressed against the surface of the roller 3 over a predetermined peripheral portion.
  • the length of this peripheral portion is in the range of about 70 to about 250 mm.
  • a hydraulic lubrication may be provided in a known manner, d. H. An oil film is produced which reduces the friction between the jacket 5 and the support element 7.
  • a nip 11 is formed, which may also be referred to as a nip.
  • the web 2 passes through the nip 11 in the direction of an arrow 12 and is subjected to pressure and an elevated temperature in the nip 11, the elevated temperature acting on a first side 13 of the web originating from the heated roll 3.
  • the residence time in the extended nip 11 is in the range of 1.5 to 15 ms. In the broad nip compressive stresses prevail in the range of 1 to 10 N / mm 2 .
  • a band 15 is guided through the nip 11. This band 15 is located between the web 2 and the jacket. 5
  • the band 15 is a metal band, preferably a steel band whose surface is smoother than the surface of the jacket 5.
  • the surface quality of the band 15 corresponds to the surface quality of the roller 3.
  • a heater 16 is arranged, which acts on the band 15.
  • the band 15 thus enters the nip 11 at an elevated temperature.
  • the temperature of the belt 15 can be exactly as high as the temperature of the roller 3 in the nip 11.
  • the band 15 is guided over a plurality of pulleys 17-22, which are arranged so that the circulation of the belt 15 is greater than the circulation of the shell 5 of the shoe roll. Outside of the nip 11, this results in a distance between the band 15 and the jacket. 5
  • a cooling device 23 which acts on the jacket 5 and the jacket 5 removes heat, which he has received in the nip 11. This heat comes for the most part of the band 15. With the help of the cooling device 23, which acts from the outside on the jacket 5, prevents the heat in the jacket 5 propagates and brings the jacket 5 in total to a higher temperature. The temperature of the jacket 5 is rather maintained in a range which is still acceptable for the material of the shell 5, usually a flexible plastic.
  • the heater 16 can be realized in various ways. It can work with IR radiation above with electric or magnetic fields. It is also possible to direct steam or hot air onto the belt 15.
  • the distance between the heater 16 and the nip 11 is shown exaggerated for the sake of intuition.
  • the heater 16 should only be so far away from the nip 11, that the band 15 in the nip 11 still has the desired high temperature.
  • the temperature should be greater than 70 ° C, preferably even in a range of 100 ° C to 150 ° C.
  • the heating device 16 can also be arranged on the other side of the band 15, ie on the inside of the circulation. However, it is advantageous if the strip 15 is heated from the side which later comes into contact with the strip 2.
  • the band 15 By the band 15, one can perform the treatment of the web 2, regardless of the surface properties of the shell 5.
  • the web 2 has no contact with the jacket 2.
  • the jacket 5 is less stressed on wear.
  • the band 15 consists of at least two layers, namely a good heat-conducting layer, for example of metal, which rests against the web 2, and a heat-insulating layer which rests on the jacket 5.
  • a good heat-conducting layer for example of metal
  • a heat-insulating layer which rests on the jacket 5.

Landscapes

  • Paper (AREA)

Claims (9)

  1. Calandre pour lisser une nappe de papier ou de carton, comprenant une ligne de contact (11), qui est formée entre un cylindre chauffable (3) et une enveloppe périphérique (5), qui est pressée contre le cylindre (3) sous l'effet d'un sabot de support (7) sur une région périphérique prédéterminée, caractérisée en ce qu'une bande chauffée supplémentaire (15) est guidée à travers la ligne de contact (11) et une section de traitement est réalisée entre la bande (15) et le cylindre (3), un dispositif de refroidissement (23) étant prévu, lequel agit sur l'enveloppe (5) et/ou la bande (15) présentant au moins deux couches dont une couche voisine de l'enveloppe (5) est réalisée de manière thermiquement isolante et une couche voisine de la nappe (2) est réalisé de manière conductrice de la chaleur.
  2. Calandre selon la revendication 1, caractérisée en ce que la bande (15) est réalisée sous forme de bande métallique.
  3. Calandre selon la revendication 1 ou 2,
    caractérisée en ce qu'un dispositif de chauffage de bande (16) est disposé avant la ligne de contact (11).
  4. Calandre selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le dispositif de refroidissement (23) est disposé derrière la sortie de la ligne de contact (11).
  5. Calandre selon l'une quelconque des revendications 1 à 4, caractérisée en ce que la bande (15) est guidée avec un parcours plus grand que l'enveloppe (5).
  6. Calandre selon l'une quelconque des revendications 1 à 5, caractérisée en ce que la bande (15) présente une surface plus lisse que l'enveloppe (5).
  7. Procédé pour lisser une nappe de papier ou de carton, dans lequel la nappe (2) est guidée à travers une ligne de contact (11), qui est formée entre un cylindre chauffé (3) et une enveloppe périphérique (5), qui est pressée à l'aide d'un élément de support (7) contre le cylindre (3), caractérisé en ce que l'on guide une bande chauffée (15) entre la nappe (2) et l'enveloppe (5) à travers la ligne de contact, et l'on refroidit l'enveloppe.
  8. Procédé selon la revendication 7, caractérisé en ce que l'on transfère de la chaleur à la bande (15) juste avant l'entrée dans la ligne de contact (11).
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que l'on sépare la bande (15) de l'enveloppe (5) en dehors de la ligne de contact (11).
EP20020024341 2001-11-24 2002-11-02 Calandre et procédé pour le lissage de bandes de papier ou carton Expired - Lifetime EP1314819B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10157687 2001-11-24
DE2001157687 DE10157687B4 (de) 2001-11-24 2001-11-24 Kalander und Verfahren zum Glätten einer Papier- oder Kartonbahn

Publications (3)

Publication Number Publication Date
EP1314819A2 EP1314819A2 (fr) 2003-05-28
EP1314819A3 EP1314819A3 (fr) 2004-01-02
EP1314819B1 true EP1314819B1 (fr) 2006-08-09

Family

ID=7706841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020024341 Expired - Lifetime EP1314819B1 (fr) 2001-11-24 2002-11-02 Calandre et procédé pour le lissage de bandes de papier ou carton

Country Status (2)

Country Link
EP (1) EP1314819B1 (fr)
DE (2) DE10157687B4 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10227979C5 (de) * 2002-06-22 2013-07-25 Voith Patent Gmbh Breitnipvorrichtung und Verfahren zum Satinieren einer Materialbahn
FI113881B (fi) * 2003-05-30 2004-06-30 Metso Paper Inc Hihnarakenne
DE10357010A1 (de) * 2003-12-05 2005-06-30 Voith Paper Patent Gmbh Anordnung zum Glätten einer Faserstoffbahn
DE102006001021A1 (de) * 2006-01-07 2007-07-12 Voith Patent Gmbh Mattsatinage
PL2072671T3 (pl) * 2007-12-20 2012-07-31 Stora Enso Oyj Układ sekcji prasowej maszyny tworzącej wstęgę oraz tektura i papier wytworzone w takim układzie
DE102008024082A1 (de) 2008-05-17 2009-11-19 Andritz Küsters Gmbh Kalander
EP2546412B1 (fr) * 2011-07-15 2015-01-21 Valmet Technologies, Inc. Dispositif et procédé pour chauffer au moins un élément d'un appareil de traitement dans une section de presse, séchage et/ou finition d'une machine de traitement d'une bande de matériau fibreux

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3920204A1 (de) * 1988-10-31 1990-05-10 Escher Wyss Gmbh Verfahren zum glaetten einer papier- oder kartonbahn
FI102305B1 (fi) * 1997-04-02 1998-11-13 Valmet Corp Kalanterointimenetelmä ja menetelmää soveltava kalanteri
FI20010391A (fi) * 2001-02-27 2002-08-28 Metso Paper Inc Kalanteri

Also Published As

Publication number Publication date
DE50207775D1 (de) 2006-09-21
EP1314819A3 (fr) 2004-01-02
DE10157687B4 (de) 2005-11-17
EP1314819A2 (fr) 2003-05-28
DE10157687A1 (de) 2003-06-12

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