EP0732447B2 - Calandre pour le traitement d'une bande de papier sur deux faces - Google Patents

Calandre pour le traitement d'une bande de papier sur deux faces Download PDF

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Publication number
EP0732447B2
EP0732447B2 EP96103279A EP96103279A EP0732447B2 EP 0732447 B2 EP0732447 B2 EP 0732447B2 EP 96103279 A EP96103279 A EP 96103279A EP 96103279 A EP96103279 A EP 96103279A EP 0732447 B2 EP0732447 B2 EP 0732447B2
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EP
European Patent Office
Prior art keywords
rolls
calender according
calender
roll
compressive stress
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
EP96103279A
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German (de)
English (en)
Other versions
EP0732447A1 (fr
EP0732447B1 (fr
Inventor
Franz Kayser
Rolf Dr. Van Haag
Ulrich Rothfuss
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 Paper GmbH and Co KG
Original Assignee
Voith Paper Patent GmbH
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Publication date
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Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • 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
    • D21G1/0233—Soft rolls

Definitions

  • the invention relates to a calender for the two-sided treatment of a paper web, in particular for the production of gravure-capable paper, with a roll stack which can be loaded from the end, the hard rolls, to which the top roll and the bottom roll belong, and soft rolls and between each a hard roll and has a soft nip formed working nip, part of the rollers being heatable.
  • Calenders of this type are widely known, for example from the brochure "The New Super Calender Concepts" from Sulzer Papertec from 1994 (code 05/94 d). They are used for the final treatment of a paper web so that it has a desired value for smoothness, gloss, thickness, bulk and the like. receives, and are set up separately from a paper machine.
  • the "soft" or elastic rollers have a cover consisting mainly of fiber material.
  • the heated rollers have a surface temperature limited to around 80 ° C.
  • the average compressive stress in the nips is between 15 and 30 N / mm 2 in normal operation, and about 40 N / mm 2 have already been used in the lowest working gap.
  • a stack of 9 or 10 rollers is sufficient for easy-to-satin papers, such as writing paper. Such a large machine is expensive and takes up a lot of space.
  • roller diameters are larger than those of the supercalender due to their strength, high line loads have to be applied in order to generate the compressive stresses required for a desired calendering result.
  • replacement rolls for the elastic rolls are expensive because they should be controllable at the same time as deflection.
  • the invention has for its object to provide a calender of the type described above, which is smaller and cheaper to manufacture and operate, but still allows excellent calendering results.
  • the 2 x 5-roll calender delivers practically the same calendering results as a conventional 12-roll calender, which was previously considered necessary for the production of gravure-capable and other high-quality papers.
  • the division into two stacks has the further advantage that the dependence of the line load on the roll weight is less, that is to say it is possible to work in the uppermost gap with a much higher line load than previously.
  • the condition applies that at least for the one working gap the condition applies that the dwell time is at most 0.9 ms and that the heating to a surface temperature of maximum 150 ° C. and the load to an average compressive stress of up to 60 N / mm 2 is designed. In fact, only a moderate increase in surface temperature and compressive stress is required.
  • condition applies to the majority of or all of the working columns. Because the increased values are evenly distributed over several working columns, very small increases are sufficient.
  • top and / or bottom roller can be controlled by deflection. In this way, the compressive stress can be evened out over the entire width of the rollers.
  • top and / or bottom roller are hard and heatable.
  • the heat energy can be supplied better via these hard rollers than via the adjacent soft roller. This also applies if the top and / or bottom roller can be controlled by deflection, because, for example, a heated hydraulic fluid can be supplied.
  • the soft rollers have a plastic cover.
  • Such plastic-related rollers are much better suited than rollers covered with fiber material for operation with increased medium compressive stress. They allow operation with a compressive stress of more than 42 N / mm 2 .
  • the reference should be designed for a compressive strength of up to about 60 N / mm 2 .
  • plastic cover consists essentially of fiber-reinforced epoxy resin.
  • Such a plastic cover has a service life of at least twelve weeks.
  • the stacks are arranged in-line in a paper machine or coating machine.
  • the paper web therefore arrives at an elevated temperature, for example at 60 ° C., at the inlet nip of the calender and therefore requires only a small amount of heat in order to make sufficient deformation energy available.
  • plastic covers which are desirable for reasons of higher compressive stress, are particularly suitable because - in contrast to covers made of fiber material - they are much less sensitive to markings and therefore only rarely have to be removed and sanded.
  • the calenders consisting of two stacks have the further advantage that they are more suitable for in-line use because the running paper web in each stack only has to be passed through a smaller number of columns.
  • all rollers have a drive.
  • the paper web can therefore be drawn in with the calender running because all the rollers can be brought to the same speed before the gaps are closed.
  • the stacks are covered by a protective hood that reduces heat radiation.
  • a protective hood reduces the heat radiation, so that the manufacturing hall does not have to be heated as much and excessively air-conditioned.
  • the temperature inside the hood is kept at a higher value, so that the heat input via the heating device can be kept low.
  • the invention is explained in more detail below with reference to preferred exemplary embodiments illustrated in the drawing.
  • the single figure shows a schematic representation of a calender according to the invention.
  • the illustrated calender 1 has two roll stacks 3 and 4, each consisting of five rolls.
  • the first stack 3 has a heatable deflection-controllable hard top roller 5, a soft roller 6, a heatable hard roller 7, a soft roller 8 and a heatable deflection-controllable hard bottom roller 9.
  • the second stack 4 has a heatable, deflection-controllable hard top roller 10, a soft roller 11, a heatable hard roller 12, a soft roller 13 and a heatable deflection-controllable hard bottom roller 14. In this way, there are four working gaps 15 to 18 in the first stack 3 and four working gaps 19 to 22 in the second stack 4, each of which is delimited by a hard roller and a soft roller.
  • a paper web 23 is fed from a paper machine 24, passes through the working gaps of the first stack 3 and then through the working gaps of the second stack 4 from top to bottom under the guidance of guide rollers 25, whereupon it is wound up in a winding device 26.
  • the paper web lies with one side on the one side and in the second stack 4 with the other side on the hard rollers, so that the desired surface structure, for example gloss or smoothness, is achieved on both sides.
  • each of the rollers 5 to 14 has its own drive 27. This enables the paper web 23 to be drawn in during operation.
  • Each of the soft rollers 6, 8, 11 and 13 has a cover 28 made of plastic, in particular fiber-reinforced epoxy resin. This cover is less sensitive to marking than a cover made of fiber material, so that the longer service lives that are essential for in-line operation are achieved. In addition, a higher compressive stress can be applied to the cover. It is also more resistant to higher temperatures than paper. An example of this is a cover from "TopTec 4" from Scapa Kern, Wimpassing / Austria.
  • the force P is used to ensure that the mean compressive stress p in the working gaps 15 to 22, or at least in the lowest gap, is between 45 and 60 N / mm 2 .
  • the heater H it is ensured that the surface temperature of the heated rollers 5, 7, 9, 10, 12, 14 is between 100 and 150 ° C.
  • the diameter of the rollers and the elasticity of the covering 28 are chosen so that there is a gap width of approximately 2 to 15 mm, preferably approximately 8 mm. Depending on the web speed, this leads to dwell times t in each working gap of 0.1 to 0.9 ms. It is preferred if the temperature T is only slightly above the lower limit, for example 110 ° C., and if the compressive stress is only slightly above the lower limit, for example 50 N / mm 2 .
  • the printability of natural and light-coated papers is not necessarily related to the gloss or smoothness of the paper web, but rather to the compression or its reciprocal bulk (in cm 3 / g).
  • the measure of the printability in the gravure printing process is determined by the number of "missing dots" Halftone and halftone dots). The best results in this regard can be obtained by ensuring that the above-mentioned limits are observed in all working columns.
  • the results of the paper treatment can be further improved by the fact that the rollers, in particular the center rollers, are mounted in levers in an unillustrated manner, the overhanging weights being advantageously compensated for by supporting devices, as is known from EP 0 285 942 B1.
  • each stack 3 4 the top roller 5, 10, the bottom roller 9, 14 and the center roller 7, 12 are designed as hard rollers which cooperate with soft rollers 6, 8, 11, 13.

Landscapes

  • Paper (AREA)

Claims (12)

  1. Calandre destinée au traitement des deux faces d'une bande de papier, notamment à la fabrication de papier pouvant être imprimé en héliogravure, avec une pile de cylindres pouvant être chargée à partir de l'extrémité, comportant des cylindres durs, dont font partie le cylindre supérieur et le cylindre inférieur, et des cylindres souples, ainsi que des emprises de travail qui sont respectivement formées entre un cylindre dur et un cylindre souple, une partie des cylindres pouvant être chauffée, caractérisée en ce qu'il est prévu deux piles identiques (3, 4) comportant chacune 5 cylindres (5 à 9 ; 10 à 14), et en ce que la condition s'appliquant à au moins une emprise de travail (15 à 22) est la suivante :
    a) la largeur de l'emprise est choisie de telle sorte que le temps de séjour (t) soit d'au moins 0,1 ms,
    b) le chauffage (H) d'un cylindre (5, 7, 9, 10, 12, 14) pouvant être chauffé délimitant l'emprise de travail est conçu pour une température de surface (T) de 100° C au moins, et
    c) la charge (P) des cylindres est conçue pour une contrainte de pression moyenne supérieure à 42 N/mm2 dans l'emprise de travail.
  2. Calandre selon la revendication 1, caractérisée en ce que la condition selon laquelle le temps de séjour (t) est de 0,9 ms maximum s'applique à l'une au moins des emprises de travail (15 à 22), et en ce que le chauffage (H) est conçu pour une température de surface de 150 °C maximum, et la charge (P) pour une contrainte de pression moyenne allant jusqu'à 60 N/mm2.
  3. Calandre selon la revendication 1 ou 2, caractérisée en ce que le temps de séjour (t) est de 0,2 à 0,5 ms, la température de surface (T) de 110 à 125 °C, et la contrainte de pression moyenne (p) de 45 à 55 N/mm2.
  4. Calandre selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la condition s'applique à la majorité ou à la totalité des emprises de travail (15 à 22).
  5. Calandre selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les cylindres supérieurs et/ou inférieurs (5, 9 ; 10, 14) peuvent être commandés en flexion.
  6. Calandre selon l'une quelconque des revendications 1 à 5, caractérisée en ce que les cylindres supérieurs et/ou inférieurs (5, 9 ; 10, 14) sont durs et peuvent être chauffés.
  7. Calandre selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les cylindres souples (6, 8, 11, 13) sont pourvus d'un revêtement (28) en matière plastique.
  8. Calandre selon la revendication 7, caractérisée en ce que le revêtement (28) en matière plastique est conçu pour une charge admissible allant jusqu'à une contrainte de pression de 60 N/mm2.
  9. Calandre selon la revendication 7 ou 8, caractérisée en ce que le revêtement (28) en matière plastique est pour l'essentiel constitué de résine époxy renforcée par des fibres.
  10. Calandre selon l'une quelconque des revendications 1 à 9, caractérisée en ce que les piles sont disposées en ligne d'une machine à papier (24) ou d'une machine de couchage.
  11. Calandre selon l'une quelconque des revendications 1 à 10, caractérisée en ce que tous les cylindres (5 à 14) comportent un entraînement (27).
  12. Calandre selon l'une quelconque des revendications 1 à 11, caractérisée en ce que les piles (3, 4) sont recouvertes d'un capot de protection (40) qui réduit le rayonnement thermique.
EP96103279A 1995-03-09 1996-03-04 Calandre pour le traitement d'une bande de papier sur deux faces Expired - Lifetime EP0732447B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508353 1995-03-09
DE19508353A DE19508353A1 (de) 1995-03-09 1995-03-09 Kalander für die zweiseitige Behandlung einer Papierbahn

Publications (3)

Publication Number Publication Date
EP0732447A1 EP0732447A1 (fr) 1996-09-18
EP0732447B1 EP0732447B1 (fr) 1998-11-25
EP0732447B2 true EP0732447B2 (fr) 2004-12-29

Family

ID=7756123

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103279A Expired - Lifetime EP0732447B2 (fr) 1995-03-09 1996-03-04 Calandre pour le traitement d'une bande de papier sur deux faces

Country Status (9)

Country Link
US (1) US5669295A (fr)
EP (1) EP0732447B2 (fr)
JP (1) JP2612681B2 (fr)
KR (1) KR0160398B1 (fr)
AT (1) ATE173776T1 (fr)
CA (1) CA2169979C (fr)
DE (2) DE19508353A1 (fr)
EA (1) EA000317B1 (fr)
NO (1) NO307617B1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19549669C2 (de) * 1995-05-24 2002-10-10 Voith Paper Patent Gmbh Kalander
DE19633671C2 (de) * 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19811474A1 (de) * 1998-03-17 1999-09-23 Kuesters Eduard Maschf Kalanderanordnung
US20030126998A1 (en) * 1998-03-17 2003-07-10 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Calender arrangement
US7096779B2 (en) 1998-03-17 2006-08-29 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calender arrangement
DE19940897C1 (de) * 1999-08-27 2000-11-09 Kuesters Beloit Gmbh & Co Kg Kalander
FI113072B (fi) * 1999-09-29 2004-02-27 Metso Paper Inc Menetelmä monitelakalanteria varten ja monitelakalanteri
FI107396B (fi) 2000-01-25 2001-07-31 Metso Paper Inc Kalanteri
FI113288B (fi) * 2000-02-16 2004-03-31 Metso Paper Inc Menetelmä ja laite paperin kalanteroimiseksi
FI107947B (fi) * 2000-06-07 2001-10-31 Metso Paper Inc Menetelmä paperirainan profiloimiseksi
DE10052187B4 (de) * 2000-10-20 2013-12-24 Voith Patent Gmbh Verfahren zum Glätten einer Materialbahn sowie Kalander zur Durchführung des Verfahrens
KR100435867B1 (ko) * 2001-11-06 2004-06-12 한솔제지주식회사 종이 표면처리용 랩 칼렌더
JP2003153677A (ja) * 2001-11-20 2003-05-27 Japan Tobacco Inc 棒状物品の製造装置
FI118857B (fi) * 2003-01-02 2008-04-15 Metso Paper Inc Menetelmä kuiturainan kalanteroimiseksi ja kalanteri

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US440377A (en) * 1890-11-11 Paper-calendering machine
US628570A (en) * 1899-04-03 1899-07-11 Edward A Edmonds Apparatus for imparting water-finish to paper.
US715017A (en) * 1902-07-08 1902-12-02 Archibald Cameron Paper-calendering machine.
US1498237A (en) * 1921-11-02 1924-06-17 Daniels A Millard Machine for surface finishing paper and similar materials
US2300994A (en) * 1938-08-09 1942-11-03 Cons Water Power & Paper Co Calender for paper
US3153378A (en) * 1961-12-04 1964-10-20 Benjamin J H Nelson Method of calendering
US3270664A (en) * 1964-06-22 1966-09-06 Beloit Corp Calender stack
AT369063B (de) * 1979-05-10 1982-12-10 Escher Wyss Ag Walzvorrichtung zum walzen von bahnfoermigen materialien
FI62874C (fi) * 1979-10-15 1983-03-10 Valmet Oy Pappers kalander
FI72768B (fi) * 1984-11-30 1987-03-31 Waertsilae Oy Ab Nerkylning av pappersbana i superkalander.
FI71374C (fi) * 1984-12-31 1986-12-19 Valmet Oy Foerfarande och anordning vid kalandrering av en bana
DE3821027A1 (de) * 1988-06-22 1989-12-28 Kuesters Eduard Maschf Kalanderanordnung
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US5237915A (en) * 1992-02-04 1993-08-24 The Mead Corporation Mixed roll calender
DE29504034U1 (de) * 1995-03-09 1995-05-04 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander für die zweiseitige Behandlung einer Papierbahn

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Title
E. Münch und C.W. Schmitz: "Der Moderne Superkalander, Basis für neue Konzeptionen der elastischen Glättung", dpw-Deutsche Papierwitschaft 1983/1, S. 57 bis 62 †
J. Pav, P. Svenka: "Der Kompaktkalander - die Antwort auf die Herausforderung nach hohen Geschwindigkeiten bei der Glättung und Satinage", Das Papier 39 Jahrgang, Heft 10A, 1985, Seiten V178-V186 †
U. Rothfuss: "In-line- und Off-line-Satinage von holzhaltigen, tiefdruckfähigen Natupapieren", 11/12, 1993, Seiten 457-466 †

Also Published As

Publication number Publication date
DE19508353A1 (de) 1996-09-12
NO960976L (no) 1996-09-10
US5669295A (en) 1997-09-23
ATE173776T1 (de) 1998-12-15
NO960976D0 (no) 1996-03-08
KR0160398B1 (ko) 1999-01-15
NO307617B1 (no) 2000-05-02
EA199600009A2 (ru) 1996-10-01
EP0732447A1 (fr) 1996-09-18
EP0732447B1 (fr) 1998-11-25
KR960034576A (ko) 1996-10-24
EA000317B1 (ru) 1999-04-29
JPH08246383A (ja) 1996-09-24
JP2612681B2 (ja) 1997-05-21
DE59600850D1 (de) 1999-01-07
CA2169979C (fr) 1999-03-23
CA2169979A1 (fr) 1996-09-10
EA199600009A3 (ru) 1996-12-30

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