EP0799933A1 - Calandre pour papier ou similaire - Google Patents

Calandre pour papier ou similaire Download PDF

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Publication number
EP0799933A1
EP0799933A1 EP97104117A EP97104117A EP0799933A1 EP 0799933 A1 EP0799933 A1 EP 0799933A1 EP 97104117 A EP97104117 A EP 97104117A EP 97104117 A EP97104117 A EP 97104117A EP 0799933 A1 EP0799933 A1 EP 0799933A1
Authority
EP
European Patent Office
Prior art keywords
zones
calender according
roller
treatment
calender
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.)
Granted
Application number
EP97104117A
Other languages
German (de)
English (en)
Other versions
EP0799933B1 (fr
Inventor
Rolf Dr. Van Haag
Heinrich Stein
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 Sulzer Finishing GmbH
Original Assignee
Voith Sulzer Finishing 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
Application filed by Voith Sulzer Finishing GmbH filed Critical Voith Sulzer Finishing GmbH
Publication of EP0799933A1 publication Critical patent/EP0799933A1/fr
Application granted granted Critical
Publication of EP0799933B1 publication Critical patent/EP0799933B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21G1/02—Rolls; Their bearings
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0286—Regulating the axial or circumferential temperature profile of the roll
    • 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
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/004—Regulating the pressure

Definitions

  • the invention relates to a calender for paper or the like. with at least two treatment stations, which are successively traversed by a web, each treatment station in a row extending transversely to the web running direction having adjoining positioning zones arranged in a predetermined division for influencing the web material.
  • calender as used herein is intended to encompass roller devices which can be used to refine paper, cardboard, film and similar material in terms of thickness, gloss, smoothness and other properties. It therefore includes both compact and super calenders, which have "soft" working gaps, which are bounded on one side by a hard roller and on the other side by a roller provided with an elastic cover, as well as smoothing units, whose working gaps on both sides by hard rollers are limited.
  • a calender of the type described at the outset is known, for example, from the applicant's prospectus "The New Soft Calender Generation” (print date 11/94 d).
  • the paper web is passed through two working gaps, which are each formed between a hard roller and a roller provided with an elastic cover.
  • the elastic roller is a bending adjustment roller with a plurality of actuators arranged next to one another in the form of support elements which, due to their pressurization, press the roller shell against the driven hard roller.
  • the width of the individual zones should be as small as possible, so that narrow areas of influence arise and defects of small width in the profile can be corrected.
  • the narrower the zones, regardless of whether they consist of one or more actuators the greater the design effort and the higher the manufacturing costs.
  • certain actuators for example hydrostatic support elements, cannot fall below a predetermined width.
  • the invention is therefore based on the object, in the case of a calender of the type described at the outset, to show a way in which the correction potential can be increased while maintaining the structural complexity.
  • control zones of the second treatment point are offset from the control zones of the first treatment point by a fraction of the division.
  • the correction of the cross profile such as thickness, gloss, smoothness or the like, is distributed over two or more treatment points. This is possible because only the end result is important. Due to the offset of the positioning zones with respect to one another, there are overlap areas which have a smaller width than the positioning zones and can nevertheless be influenced individually. Another advantage is that within the cross section the transitions from one control zone to the adjacent control zone can be compensated much better than before.
  • the setting zones of the first and second treatment points are offset by half a division. You get a doubling of the individually controllable areas.
  • control zones are each formed by a single, individually adjustable actuator. This leads to extremely narrow, individually controllable areas.
  • the adjustment zones are formed by two or more actuators which can be adjusted together. Despite the simplifications that result in the combination of individual actuators in zones, one can work here with areas that are narrower than the zone width and that can be individually corrected.
  • the treatment sites are formed by working gaps, each of which is delimited by two rollers, and that one roller is a bending adjustment roller, the jacket of which can be pressed against the other roller by the actuating elements which can be acted upon with adjustable pressure. It is especially when using bending adjustment rollers cheap to work with narrow overlap areas to correct the cross profile. Because of the rigidity of the roll shell, every change in the line load in one zone also leads to changes in the two neighboring zones. This effect can be kept smaller if the correction is distributed over two successive, mutually offset control zones.
  • two identical bending adjustment rollers are provided to form the two working gaps, which have a plurality of zones each consisting of two support elements and a single support element at one edge. This makes it possible to make do with a single reserve roller, which saves space and costs.
  • the jacket of the bending adjustment roller consists essentially of fiber-reinforced plastic.
  • Such a jacket is easier to deform than a hard cast iron or steel jacket. It therefore follows the deformations required for the correction much better. The correction potential is increased.
  • actuators of a different type can also be considered, in particular inductive heating elements or heating or cooling air nozzles. It also applies to these actuators that they must have a certain minimum width and only through the inventive proposal are suitable for correcting narrower areas.
  • the treatment sites prefferably be provided on two separately arranged roller pairs or stacks.
  • the treatment points are completely separated from each other, which makes it easier to control the individual actuators.
  • a further control intervention is preferably possible in that one bending adjustment roller is axially displaceable relative to the other bending adjustment roller for the purpose of cross-profile control.
  • a first treatment point 2 is formed by a soft working gap 3, which is driven by a hard hard roller 4 and a soft one Roller 5 is limited.
  • the latter is a bending adjustment roller, the roller jacket 6 of which is supported on a carrier 8 by actuators 7 in the form of hydrostatic support elements.
  • the jacket 6 consists of a fiber-reinforced plastic.
  • a second treatment point 9 is formed by the soft working gap 10, which is delimited by a driven hard roller 11 and a soft roller 12.
  • the soft roller is again a bending adjustment roller, the jacket 13 of which is made of fiber-reinforced plastic and is supported by actuators 14 in the form of hydrostatic support elements on a carrier 15 arranged in a rotationally fixed manner.
  • each treatment point 2 and 9 is assigned an inductive heating device 16 and 17, which also consists of a series of actuators arranged side by side. Instead of the inductive heating device, a number of cooling or hot air nozzles can also be provided.
  • a sensor 18 Before entering the first treatment site 2 there is a sensor 18 which, as shown in FIG. 2, can be moved back and forth over the surface of the web 1.
  • a second sensor 19 is located behind the second treatment point 9. These sensors measure certain parameters of the web 1, for example the thickness, the gloss or the smoothness.
  • the measurement signals are fed to a controller 20 which has an input 21 for a cross-section setpoint.
  • the two schematically indicated outputs 22 and 23 individually assign the actuators 7 and 14 a pressure with which they are pressed against the jacket 6 and 13, respectively. Only eight actuators 7 and 14 are illustrated in the drawing. In practice, however, it is a much larger number, with widths of 15 to 30 cm being common. Since each actuator is provided with its own pressure line 24 or 25, relatively small adjustment zones Z1 or Z2 result.
  • the two rollers 5 and 12 have the same design, but are offset from one another by the amount V. This corresponds to half a division of the control zones Z1 and Z2. As a result, narrow areas of the web 1 corresponding to the offset V can be individually influenced, although the width of the individual zones Z1 and Z2 is larger.
  • FIG. 3 how the situation is in the prior art. Reference numbers increased by 100 are used for corresponding parts. These are identical rollers 105 and 112, in each of which two actuators 107 and 114 are combined to form a actuation zone Z3 and Z4 which can be controlled together.
  • each roller has a variety of Adjustment zones Z5 and Z6, which are each formed by two actuators 207 and 214, and at the edge a shorter zone Z7 and Z8, which is formed by only one actuator 207a and 214a.
  • the positioning zones are offset by half a division. If you want to make a correction in the area of arrow C, it is sufficient to apply pressure to the actuating zone Z5.
  • the action curve P 203 is then identical to the desired total action curve P C.
  • the roller 12 can be offset from the roller 5 in a simple manner in that the calender frame in which the roller 12 is mounted is laterally offset. It is also possible to change the size of the offset during operation in order to be able to introduce an additional control parameter in this way.

Landscapes

  • Paper (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
EP97104117A 1996-04-06 1997-03-12 Calandre pour papier ou similaire Expired - Lifetime EP0799933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19613878 1996-04-06
DE19613878A DE19613878C1 (de) 1996-04-06 1996-04-06 Kalander für Papier o. dgl.

Publications (2)

Publication Number Publication Date
EP0799933A1 true EP0799933A1 (fr) 1997-10-08
EP0799933B1 EP0799933B1 (fr) 1999-09-22

Family

ID=7790705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104117A Expired - Lifetime EP0799933B1 (fr) 1996-04-06 1997-03-12 Calandre pour papier ou similaire

Country Status (5)

Country Link
US (1) US6024838A (fr)
EP (1) EP0799933B1 (fr)
JP (1) JP2887123B2 (fr)
CA (1) CA2201663C (fr)
DE (2) DE19613878C1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115144B (fi) 1999-10-13 2005-03-15 Metso Paper Inc Kalanterointimenetelmä
WO2003064761A1 (fr) * 2002-01-29 2003-08-07 Metso Paper, Inc. Dispositif de traitement et procede d'utilisation de ce dispositif pour traiter une nappe fibreuse enduite ou non enduite
FI114648B (fi) * 2003-06-18 2004-11-30 Metso Paper Inc Menetelmä ja laitteisto paperi- tai kartonkirainan kalanteroimiseksi
FI120269B (fi) 2006-12-18 2009-08-31 Metso Paper Inc Kuiturainaa käsittelevän koneen telajärjestely

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945654A (en) * 1989-04-20 1990-08-07 Mason Robert J H Application of superheated steam
DE4442746C1 (de) * 1994-12-01 1996-05-02 Voith Sulzer Finishing Gmbh Verfahren und Vorrichtung zum Behandeln einer Materialbahn

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3408119A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
DE3408118A1 (de) * 1984-02-06 1985-08-14 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Nasspresse zum entwaessern einer faserbahn
GB2161105B (en) * 1984-07-04 1988-06-15 Fred Whitehead Calendar or roll assembly
CA1249470A (fr) * 1985-01-08 1989-01-31 Gregory L. Wedel Presse lineaire electromagnetique a rallonge
FI77489C (fi) * 1985-11-27 1989-03-10 Valmet Oy Pressvals foer behandling av i synnerhet en pappersbana eller motsvarande.
CH670217A5 (fr) * 1986-06-20 1989-05-31 Escher Wyss Gmbh
DE3920204A1 (de) * 1988-10-31 1990-05-10 Escher Wyss Gmbh Verfahren zum glaetten einer papier- oder kartonbahn
JP2879393B2 (ja) * 1992-07-13 1999-04-05 ハウス食品株式会社 キャップの良否検出装置
US5439559A (en) * 1994-02-14 1995-08-08 Beloit Technologies Heavy-weight high-temperature pressing apparatus
DE19645407A1 (de) * 1996-11-04 1998-05-07 Voith Sulzer Papiermasch Gmbh Schuhpresse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4945654A (en) * 1989-04-20 1990-08-07 Mason Robert J H Application of superheated steam
DE4442746C1 (de) * 1994-12-01 1996-05-02 Voith Sulzer Finishing Gmbh Verfahren und Vorrichtung zum Behandeln einer Materialbahn

Also Published As

Publication number Publication date
JPH1025689A (ja) 1998-01-27
EP0799933B1 (fr) 1999-09-22
DE59700458D1 (de) 1999-10-28
US6024838A (en) 2000-02-15
CA2201663C (fr) 1999-12-14
JP2887123B2 (ja) 1999-04-26
DE19613878C1 (de) 1997-06-12
CA2201663A1 (fr) 1997-10-06

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