EP0732443B2 - Calandre pour le traitement d'une bande de papier - Google Patents

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

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Publication number
EP0732443B2
EP0732443B2 EP96103275A EP96103275A EP0732443B2 EP 0732443 B2 EP0732443 B2 EP 0732443B2 EP 96103275 A EP96103275 A EP 96103275A EP 96103275 A EP96103275 A EP 96103275A EP 0732443 B2 EP0732443 B2 EP 0732443B2
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EP
European Patent Office
Prior art keywords
roll
rolls
calender
soft
papers
Prior art date
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Expired - Lifetime
Application number
EP96103275A
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German (de)
English (en)
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EP0732443A1 (fr
EP0732443B1 (fr
Inventor
Rolf Dr. Van Haag
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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    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to an in-line calender for the treatment of a paper web according to the preamble of claim 1.
  • 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 serve for the final treatment of a paper web so that it obtains a desired value for roughness or smoothness, gloss, thickness, bulk and the like, and are set up separately from a paper machine.
  • the "soft” or elastic rollers carry a cover consisting mainly of a fiber material.
  • the heated honeycombs 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 values of a maximum of about 40 N / mm 2 have already been used in the lowest working gap.
  • So-called compact calenders are also known, in which a heatable roll with a deflection-controllable one soft roller forms a gap and two such for the treatment of the paper web on both sides Calenders can be connected in series.
  • This only allows papers that are easy to satin, but not technical papers, e.g. Manufacture raw silicone paper and gravure papers.
  • the heated rollers therefore have one Surface temperature from 160 to 200 ° C. A lot of heat energy is emitted, which by air conditioning again must be dissipated. Because the roll diameter is larger than that of the supercalender due to the strength high line loads are applied in order to achieve the compressive stresses required for a desired satin finish to create.
  • replacement rolls for the elastic rolls are expensive because they are deflectable at the same time should be.
  • the invention has for its object to provide a calender of the type described above, the smaller as well as cheaper to manufacture and operate, but still enables excellent calendering results.
  • a moderate temperature increase to a little over 100 ° C is useful in order to achieve the same results with an 8-roll calender as with a conventional 12-roll calender.
  • the depth of the permanent deformation is smaller with a defect thickness of 1 mm than 0.04 mm and decreases disproportionately with decreasing impurity thickness.
  • Such a material has so vanishing small permanent deformations that they are not noticeable for the quality of the paper to be treated Role-play.
  • the reference is designed for a compressive strength of over 42 N / mm 2 . This takes into account the fact that, in some cases, it proves expedient to work with a somewhat higher compressive stress.
  • the cover preferably consists essentially of fiber-reinforced epoxy resin.
  • a plastic with The properties required above are available on the market, for example under the name “TopTec 4 "at Scapa Kern, Wimpassing / Austria.
  • top and / or bottom roller can be controlled by deflection. This will reduce the compressive stress equalized across the width of the roll stack.
  • the calender 1 illustrated in FIG. 1 has a roll stack consisting of eight rolls, namely a heatable, deflection-controllable hard top roller 2, a soft roller 3, a heatable hard roller Roller 4, a soft roller 5, a soft roller 6, a heatable hard roller 7, a soft roller 8 and a heatable, deflection-controllable hard lower roller 9.
  • a heatable, deflection-controllable hard top roller 2 a soft roller 3
  • a heatable hard roller Roller Roller 4 a soft roller 5
  • a soft roller 6 a heatable hard roller 7, a soft roller 8 and a heatable, deflection-controllable hard lower roller 9.
  • a paper web 17 is fed from a paper machine 18, passes under the guidance of guide rollers 19 the working column 10 to 12, the alternating gap 16 and the working column 13 to 15, whereupon they in a winding device 20 is wound up.
  • the paper web lies in one of the three upper working columns 10 to 12, in the three lower working columns 13 to 15 with the other side on the hard rollers, so that the desired on both sides Surface structure, for example gloss or smoothness, is achieved.
  • each of the rollers 2 to 9 has its own drive 21. This enables the paper web 17 to be drawn in during operation.
  • Each of the soft rollers 3, 5, 6 and 8 has a cover 22 made of a marking-insensitive plastic, in particular fiber-reinforced epoxy resin, which can also be subjected to a higher compressive stress of, for example, 45 N / mm 2 and more. It is also more resistant to higher temperatures than a fiber material.
  • the force P is used to ensure that the mean compressive stress p in the working gaps 10 to 12 and 13 to 15, or at least in the lowest gap, is between 45 and 60 N / mm 2 .
  • the surface temperature of the heatable rollers 2, 4, 7 and 9 is between 100 and 150 ° C.
  • the diameter of the rollers and the elasticity of the covering 22 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 roughness R in FIG. 2 is a function of the number of illustrated column in a 12-roll calender.
  • the curve WS applies to the "wireside” and the Curve “TS” applies to the "topside” of the paper web. It can be seen that in the "wireside” the first four columns and the last three columns and for the "topside” practically only the first four columns are important. According to the invention is therefore used with a smaller number of rollers, possibly with slightly higher values of the compressive stress and / or the temperature. However, it must now be taken into account that there are hardly any gaps left, to treat paper damaged by markings. Therefore, soft rollers with an in highly insensitive plastic cover used.
  • the results of the paper treatment can be improved by the fact that the rollers, in particular the center rollers, are mounted in levers, not shown, with advantage, the overhanging Weights are compensated by support devices, as is known from EP 0 285 942 B1.

Landscapes

  • Paper (AREA)

Claims (5)

  1. Calandre en ligne pour le traitement d'une bande de papier apportée d'une machine à papier pour obtenir des papiers de qualité supérieure, comme les papiers utilisés en héliogravure, les papiers techniques ou les papiers denses, avec un empilement de cylindres qui comporte des cylindres durs et des cylindres mous ainsi que des fentes de travail formées à chaque fois entre un cylindre dur et un cylindre mou, une face de la bande se trouvant d'abord contre un cylindre dur dans des fentes de travail puis l'autre face de la bande se trouvant contre un cylindre dur dans des fentes de travail, caractérisée en ce que
    a) l'empilement comporte 6 à 8 cylindres (2 à 9) avec une fente de retournement (16) formée entre deux cylindres mous,
    b) les cylindres mous portent un revêtement (22) en une matière plastique ayant une telle reprise élastique que la profondeur de la déformation restante après le passage d'un défaut ayant jusqu'à 1 mm d'épaisseur à travers la fente de travail vaut au maximum 5 % de l'épaisseur du défaut,
    c) et au moins un cylindre limitant une fente de travail (10 à 15) peut être chauffé à une température superficielle supérieure à 100°C.
  2. Calandre selon la revendication 1, caractérisée en ce que la profondeur de la déformation restante pour une épaisseur de défaut de 1 mm est inférieure à 0,04 mm et diminue de manière surproportionnelle lorsque l'épaisseur de défaut diminue.
  3. Calandre selon la revendication 1 ou 2, caractérisée en ce que le revêtement (22) est conçu pour une capacité de charge par contrainte de pression supérieure à 42 N/mm2.
  4. Calandre selon l'une des revendications 1 à 3, caractérisée en ce que le revêtement (22) est globalement en résine époxy renforcée par des fibres.
  5. Calandre selon l'une des revendications 1 à 4, caractérisée en ce que le cylindre supérieur (2) et/ou le cylindre inférieur (9) peuvent être contrôlés en flexion.
EP96103275A 1995-03-09 1996-03-04 Calandre pour le traitement d'une bande de papier Expired - Lifetime EP0732443B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19508352 1995-03-09
DE19508352A DE19508352B4 (de) 1995-03-09 1995-03-09 Kalander für die Behandlung einer Papierbahn

Publications (3)

Publication Number Publication Date
EP0732443A1 EP0732443A1 (fr) 1996-09-18
EP0732443B1 EP0732443B1 (fr) 1998-10-21
EP0732443B2 true EP0732443B2 (fr) 2004-05-26

Family

ID=7756122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103275A Expired - Lifetime EP0732443B2 (fr) 1995-03-09 1996-03-04 Calandre pour le traitement d'une bande de papier

Country Status (3)

Country Link
US (1) US5704285A (fr)
EP (1) EP0732443B2 (fr)
DE (2) DE19508352B4 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547164C1 (de) * 1995-12-16 1997-02-06 Voith Sulzer Finishing Gmbh Kalander für die Behandlung einer Papierbahn und Anwendung dieses Kalanders
DE19633671C2 (de) * 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19711241C2 (de) * 1997-03-18 2002-08-29 Voith Paper Patent Gmbh Kalander für Papier und ähnliches Bahnmaterial
DE19803323C2 (de) * 1998-01-29 2003-06-05 Voith Paper Patent Gmbh Verfahren zur Beeinflussung eines Bahnmaterials, wie Papier, und Kalander zur Durchführung des Verfahrens
DE50102790D1 (de) 2001-03-22 2004-08-12 Kuesters Eduard Maschf Kalander
DE102009046918A1 (de) * 2009-11-20 2011-05-26 Voith Patent Gmbh Mehrwalzenkalander und Umbauverfahren eines Mehrwalzenkalanders

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2300994A (en) * 1938-08-09 1942-11-03 Cons Water Power & Paper Co Calender for paper
US3270664A (en) * 1964-06-22 1966-09-06 Beloit Corp Calender stack
US3841963A (en) * 1971-07-06 1974-10-15 Kleinewefers Ind Co Gmbh Apparatus for satinizing fibrous webs
JPS5724216A (en) * 1980-07-21 1982-02-08 Fuji Photo Film Co Ltd Supercalender
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
DE3711334A1 (de) * 1987-04-03 1988-10-13 Escher Wyss Gmbh Vorrichtung zur fuehrung der walzen eines im wesentlichen vertikalen kalanders
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

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
Erhardt Münch und Chr.-Wimmar Schmitz: "Der moderne Superkalander-Basis für neue Konzeptionen der elastischen Glättung", dpw-Deutsche Papierwirtschaft 1983/1, Seiten 57-62 †
H.L. Baumgarten: "Theorie und Wirkung der Satinage", Das Papier, Heft 10A, 1974, Seiten V57-V64 †
N. Gamsjäger: "Eölastische Kalanderwalzenbezüge auf Basis Faser-Kunststoff-Verbund", Sonderdruck aus "Das Papier" 48, 1994, Nr. 6, Seiten 334-348 †
P. Svenka, "Off-line-Glàttechnik" in: APV-Jahrestreffen 1992, Sonderdruck aus dem "Wochenblatt für Papierfabrikation" 121, 1993, Seiten 29 bis 33 †
Rüdiger Kurz, "Glättechnologie-Wo stehen wir heute und was kommt auf uns zu?" in: Informationstagung Glättechnik, Friedrichshafen vom 21-23.11.1990, Escher Wyss Papiertechnik †
Scapa Kern GmbH: "Reference List "TopTec"", Seiten 1-5, November 1994; "Reference List "TopTec SC"", Seite 1/1, November 1994; "Elastic Calender Covers", Deckblatt und Seiten 1-4, Nr. ECC031-0.DOC, 06.05.1993 †
T.L. Schuelke, "Supercalender: Improvements that enhance quality, productivity and safety", Finishing and Converting Conference 1993, Seiten 289-309 †

Also Published As

Publication number Publication date
DE19508352A1 (de) 1996-09-12
US5704285A (en) 1998-01-06
EP0732443A1 (fr) 1996-09-18
EP0732443B1 (fr) 1998-10-21
DE19508352B4 (de) 2005-07-21
DE59600686D1 (de) 1998-11-26

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