EP0735185A2 - Calandre pour le traitement des deux surfaces d'une bande de papier - Google Patents

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

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Publication number
EP0735185A2
EP0735185A2 EP96104020A EP96104020A EP0735185A2 EP 0735185 A2 EP0735185 A2 EP 0735185A2 EP 96104020 A EP96104020 A EP 96104020A EP 96104020 A EP96104020 A EP 96104020A EP 0735185 A2 EP0735185 A2 EP 0735185A2
Authority
EP
European Patent Office
Prior art keywords
roller
rollers
soft
jacket
calender according
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
EP96104020A
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German (de)
English (en)
Other versions
EP0735185A3 (fr
EP0735185B1 (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 Patent GmbH
Original Assignee
Voith Sulzer Finishing GmbH
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Filing date
Publication date
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Application filed by Voith Sulzer Finishing GmbH filed Critical Voith Sulzer Finishing GmbH
Publication of EP0735185A2 publication Critical patent/EP0735185A2/fr
Publication of EP0735185A3 publication Critical patent/EP0735185A3/fr
Application granted granted Critical
Publication of EP0735185B1 publication Critical patent/EP0735185B1/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

Definitions

  • the invention relates to a calender for double-sided paper treatment with a roll stack, which has a hard upper roll, a hard lower roll and in between further hard and soft rolls, as well as a working gap formed between a hard and a soft roll and an alternating gap formed between two soft rolls and which can be loaded in the stack direction by forces acting on the stack ends.
  • Such calenders are known, for example, from the brochure "The New Super Calender Concepts” from Sulzer Papertec Krefeld GmbH from May 1994. They serve to satin coated and uncoated papers, for example printing papers or silicone base papers.
  • "Hard” rollers are metal rollers with a smooth and hard surface, which are essentially responsible for the smoothness and gloss.
  • “Soft” rollers are rollers with an elastic or soft surface that essentially ensure even compaction. The alternating gap is required so that both sides of the paper web are treated approximately evenly. It is common to use a calender with 12 to 16 rolls, with the alternating nip in the lower half of the stack.
  • a device for positioning roll surfaces in which a roll stack with seven rolls is provided, of which the top roll, the bottom roll and the center roll are designed as bending adjustment rolls.
  • the other rollers are mounted on levers. Hydraulic servomotors, which act on the levers or on the ends of the bending adjustment rollers, serve to raise, lower, hold the roller surface in the desired position and relieve it from the effects of the overhanging weights. Soft rollers and working and changing gaps formed with their help to eliminate the differences on both sides of the paper web are not mentioned.
  • the invention has for its object to provide a calender of the type described above, which largely ensures the same calendering results for a particular type of paper, but has a smaller height and its manufacturing and operating costs are lower.
  • the stack has 8 rollers, of which the two middle rollers form the changing gap, that one of the intermediate rollers is a bending adjustment roller with a jacket stroke, the jacket of which by an upper pressure-bearing support device and a lower pressure-bearing support device on the jacket penetrating carrier is supported, and that the supporting force exerted by the upper support device on the jacket is greater than the supporting force exerted by the lower support device.
  • the number of working gaps above the alternating gap is equal to the number of working gaps below the alternating gap and thus less than in the known supercalender. Nevertheless, the same calendering result is achieved as with a 12-roll calender, because it is possible to work with a relatively large line load in all working columns.
  • the middle bending adjustment roller has the effect that the paper side abutting the hard rollers above the alternating nip is treated similarly to the paper side abutting the hard rollers below the alternating nip.
  • Both the lowest working gap in the lower half of the stack and the lowest working gap in the upper half of the stack can be used with the maximum permissible compressive stress.
  • the compressive stresses in the gaps above can also be correspondingly large.
  • the three nips above the alternating nip in the 8-roll calender achieve the same result as in the 12-roll calender the first seven working nips. Since a bending adjustment roller with a jacket stroke is used, it can be used in a stack, the rollers of which can be separated from one another in the usual way, for example by lowering the lower roller.
  • the calender Since the calender has a lower overall height, lower buildings are also required, which considerably reduces installation costs. Furthermore, the calender is inexpensive to manufacture and operate because of the smaller number of rolls.
  • one of the two middle rollers is designed as a bending adjustment roller.
  • the decoupling of the upper and the lower load system is particularly large because the jacket of the bending adjustment roller provided with a cover is easier to deform.
  • the different loads act on one half of the stack.
  • the fifth roller is designed as a bending adjustment roller from above.
  • the influence of the roller weight on the lowest working gap is then the least.
  • the intermediate rollers with the exception of the bending adjustment roller, are mounted on levers which are loaded by compensators to compensate for overhanging weights. In this way it is ensured that only the roller weight, but not overhanging weights and the like. into the line load prevailing in each working gap. This results in a steep load characteristic, according to which it is possible to work with a relatively high line load in all working columns.
  • the sum of the line loads in the working gaps above the alternating gap is 80% to 120% of the total of the line loads of the working gaps below the alternating gap.
  • the sum of the line loads is a good indication of the mechanical impact on the paper. Even if the sum of the line loads above the alternating gap is not identical with the sum of the line loads below the alternating gap, you still get excellent satin results that meet the requirements of practice.
  • the calendering performance can be taken into account even better if the sum of the products from the dwell time and mean compressive stress in the working gaps above the alternating gap is 80% to 120% of the sum of the products mentioned in the working gaps below the alternating gap. Because dwell time and compressive stress are two decisive factors for paper deformation.
  • rollers themselves are light in weight. This happens with the hard rollers in that they have the smallest possible diameter and the thinnest possible wall thickness. In the case of the soft rollers, one should use lighter structures instead of the compact and heavy rollers with paper cover.
  • the soft roller has a plastic jacket. Such covers are much thinner than paper covers and accordingly lighter.
  • the soft roller has a jacket made of fiber-reinforced plastic, such as epoxy resin.
  • the fiber reinforcement in particular with carbon fibers, allows stability and low weight to be combined.
  • At least one hard roller can be heated. This makes it possible to supply thermal deformation energy, so that overall a lower line load can be used. In addition, however, it is possible to achieve a higher degree of adaptation of the calendering result on both sides of the paper web by different heating in the different working gaps.
  • the upper and / or lower rollers can advantageously be heated. Heat can therefore be supplied in the first and also in the last gap, which offers correction options on both sides of the paper web.
  • top and / or bottom roller is a bend adjustment roller.
  • the deflection control allows the line load to be kept constant across the width of the paper web in order to achieve a very even satin finish result.
  • the illustrated calender 1 has a roll stack consisting of eight rolls, namely a heatable, deflection-controllable hard top roll 2, a soft roll 3, a heatable hard roll 4, a soft roll 5, a deflection-controllable soft roll 6, a heatable hard roll 7, a soft roller 8 and a heatable, deflection-controllable hard lower roller 9.
  • a heatable, deflection-controllable hard top roll 2 a soft roll 3, a heatable hard roll 4, a soft roll 5, a deflection-controllable soft roll 6, a heatable hard roll 7, a soft roller 8 and a heatable, deflection-controllable hard lower roller 9.
  • a paper web 17 is fed from a paper machine, passes through the working gaps 10 to 12, the changing gap 16 and the working gaps 13 to 15 under the guidance of guide rollers 18, whereupon it is wound up in a winding device.
  • the paper web lies on one side, in the three lower working gaps 13 to 15 on the other side against the hard rollers, so that the desired surface structure, for example gloss or smoothness, is achieved on both sides.
  • the top roller 2 and bottom roller 9 are designed as bending adjustment rollers, in which the roller jacket 19 is supported on a non-rotatable carrier 21 by a series of support elements 20.
  • the soft roller 6 is also designed as a bending adjustment roller, the jacket 22 being supported on a non-rotatable and stationary support 25 via an upper support device 23, formed by a series of support elements, and a lower support device 24, formed by a series of support elements.
  • This roller 6 is designed with a jacket stroke, i.e. the jacket 22 as a whole is vertically adjustable relative to the carrier 25.
  • Bending adjustment rollers of this type are known, for example in the form of NIPCO or HYDREIN rollers.
  • the support elements can also be replaced by other known support devices.
  • each lever can be loaded by a compensator 28, which Effect of the overhanging weights, for example the guide roller 18, compensated and thereby keeps the effective weight of the associated roller small.
  • the compensators 28 can be loaded in any way, for example by a liquid pressure or a spring.
  • the carrier of the lower roller 9 can be lowered by means of a lifting cylinder 29.
  • the rollers 3, 4, 5, 6, 8 mounted on levers 26 lower until the levers abut an abutment (not illustrated) which can be included in the compensator, while the soft roller 6 drops until the jacket stroke is complete an internal attack has ended. If there is to be a gap of, for example, 4 mm between all the rollers, the roller 3 must be able to be moved down by 4 mm, the roller 4 by 8 mm, the roller 5 by 12 mm and the jacket 22 of the roller 6 by 16 mm .
  • the soft rollers for example 3, have a support tube 30 with a cavity 31.
  • a plastic jacket 32 is arranged on the support tube, which can consist, for example, of fiber-reinforced epoxy resin.
  • Such a soft roller is much lighter than a conventional roller with a cover made of fiber material.
  • One or more of the hard rollers 2, 4, 7, 9 can be heated, as indicated by the arrows H1 to H4.
  • the upper roller 2 has an induction heating device 33 for this purpose.
  • the heating energy can, however, also be supplied in another way, for example by electrical resistance heating, by radiant heating, with the aid of a heat transfer medium and the like.
  • a control unit 34 coordinates the individual parameters of the paper web treatment. So, besides the heating energy H1 to H4 determine the force P with which the upper roller 2 is pressed down, 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. Pressures p1, p2, p3 and p4 are supplied individually or in zones to the support elements in the rolls 2, 6 and 9, which ensure that all three bending adjustment rolls ensure that there is a uniform compressive stress over the length of the rolls. In addition, the support devices 23 and 24 of the roller 6 are controlled so that the force acting upwards is somewhat greater than the force acting downwards.
  • the working gaps 10 to 12 in the upper part of the stack 1 and the working gaps 13 to 15 in the lower part of the stack are decoupled from one another. It is therefore possible to treat the one side of the paper in the three upper nips which is similar to that on the other side of the paper in the three lower working nips.
  • a line load f1 results in the first working gap 10, which depends on the force P and the effective weight of the top roller 2, and in the second working gap 11 a line load f2 results on the force P and the effective weights of the two upper rollers 2 and 3, and in the third working gap 12 a line load f3, which depends on the force P and the effective weights of the rollers 2 to 4.
  • the associated support force is applied by the upper support device 23.
  • the line loads f4, f5 and f6 in the working gaps 13 to 15 underneath are completely independent of this.
  • the line load f4 in the working gap 13 depends solely on the force which is generated by the lower support device 24.
  • the line load f5 is around the effective weight of the roller 7 and the line load f6 in the working gap 15 larger by the effective weight of the rollers 7 and 8.
  • the aim is that the sum of the line loads f1 + f2 + f3 of the uppermost working columns 10, 11 and 12 at 80% to 120%, preferably about 100%, of the sum of the line loads f4 + f5 + f6 of the three lowest working columns 13, 14 and 15 lies.
  • the results are similar, by comparing the sum of the products for the top three working columns with the sum of these products for the three lower working columns.
  • the upper total should be 80% to 120% of the lower total.
  • the treatment in the first three working columns 10, 11 and 12 is so close to the treatment in the last three working columns 13, 14 and 15 that the satin effect on both sides of the paper web is largely the same. Any necessary corrections can be made using different heating of the heated rollers 2, 4, 7 and 9.
  • the temperature is only slightly above the lower limit, for example at 110 ° C., and if the compressive stress is only slightly above the lower limit, for example at 50 N / mm 2 . Compared to a 12-roll calender, slight increases in thermal and mechanical energy are therefore sufficient to achieve the same calendering results with an 8-roll calender.

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  • Paper (AREA)
EP96104020A 1995-03-27 1996-03-14 Calandre pour le traitement des deux surfaces d'une bande de papier Expired - Lifetime EP0735185B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19511145 1995-03-27
DE19511145A DE19511145C2 (de) 1995-03-27 1995-03-27 Kalander für die zweiseitige Papierbehandlung

Publications (3)

Publication Number Publication Date
EP0735185A2 true EP0735185A2 (fr) 1996-10-02
EP0735185A3 EP0735185A3 (fr) 1998-05-06
EP0735185B1 EP0735185B1 (fr) 2001-07-11

Family

ID=7757841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96104020A Expired - Lifetime EP0735185B1 (fr) 1995-03-27 1996-03-14 Calandre pour le traitement des deux surfaces d'une bande de papier

Country Status (3)

Country Link
US (1) US5662037A (fr)
EP (1) EP0735185B1 (fr)
DE (2) DE19511145C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0882838A1 (fr) * 1997-06-05 1998-12-09 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calandre
EP0972880A3 (fr) * 1998-07-16 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Calandre pour bandes de papier ou analogue
EP0972877A3 (fr) * 1998-07-16 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Calandre pour bandes de papier ou analogue
CN1101500C (zh) * 1997-05-07 2003-02-12 韦尔梅特公司 控制砑光机轧点载荷的方法和装置

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI107626B (fi) * 1996-05-06 2001-09-14 Metso Paper Inc Menetelmä kalanterin, etenkin superkalanterin telaston pika-avauksessa ja hydraulijärjestelmä kalanterin, etenkin superkalanterin telastoa varten
DE19631056C2 (de) * 1996-08-01 2000-08-17 Voith Sulzer Finishing Gmbh Kalander
DE19633671C2 (de) * 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19757472C2 (de) * 1997-12-23 2000-09-07 Voith Sulzer Papiermasch Gmbh Kalander für eine Bahn, insbesondere Papierbahn
DE19800331A1 (de) * 1998-01-08 1999-07-15 Voith Sulzer Papiertech Patent Papierkalander und Verfahren zu dessen Betrieb
US5938895A (en) * 1998-04-02 1999-08-17 Valmet Corporation Calender having moisture profile control
DE19820087B4 (de) * 1998-05-06 2005-06-23 Eduard Küsters Maschinenfabrik GmbH & Co. KG Kalander für die Behandlung einer Warenbahn
DE19832067B4 (de) * 1998-07-16 2005-04-21 Voith Paper Patent Gmbh Kalander für Bahnen aus Papier oder ähnlichem Material
AU6845000A (en) * 1999-08-27 2001-03-26 Metso Paper Inc. Shoe roll
FI114405B (fi) * 1999-09-24 2004-10-15 Metso Paper Inc Kalanteri ja menetelmä paperi- tai kartonkirainan kalanteroimiseksi
DE19945780C1 (de) * 1999-09-24 2001-01-18 Voith Paper Patent Gmbh Kalander
DE10057991C5 (de) * 2000-11-23 2007-04-19 Voith Patent Gmbh Kalander und Verfahren zum Behandeln einer Materialbahn
DE50102790D1 (de) * 2001-03-22 2004-08-12 Kuesters Eduard Maschf Kalander
FI116855B (fi) 2002-06-06 2006-03-15 Metso Paper Inc Järjestely telanippien sulkemiseksi
DE102005021069A1 (de) * 2005-05-06 2006-11-09 Voith Patent Gmbh Kalander
DE102008040247A1 (de) 2008-07-08 2010-01-14 Voith Patent Gmbh Bandkalender

Family Cites Families (13)

* 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
US2926600A (en) * 1958-01-23 1960-03-01 St Regis Paper Co Method and means of supercalendering
DE1461206A1 (de) * 1964-10-16 1969-03-13 Eck & Soehne Kalander
US3340796A (en) * 1964-11-25 1967-09-12 Kimberly Clark Co Paper supercalender stack
US3611917A (en) * 1967-06-09 1971-10-12 Dominion Eng Works Ltd Calender stack with swimming roll
DE3516535A1 (de) * 1985-05-08 1986-11-13 Kleinewefers Gmbh Walzenaggregat mit durchbiegungssteuerbarer und temperierbarer walze
DE3640161A1 (de) * 1985-12-23 1987-07-02 Escher Wyss Gmbh Vorrichtung zum zueinander positionieren von walzenflaechen
DE3611858A1 (de) * 1986-04-09 1987-10-15 Kleinewefers Gmbh Deformationsregelwalze
DE3713561A1 (de) * 1987-04-23 1988-11-10 Escher Wyss Gmbh Kalander mit niprelieving
EP0290637B1 (fr) * 1987-05-09 1991-01-16 Kleinewefers GmbH Procédé pour l'exploitation d'une calandre et dispositif de contrôle pour l'application du procédé
DE3936128A1 (de) * 1989-10-30 1991-05-02 Escher Wyss Gmbh Kalander zur oberflaechenbearbeitung von materialbahnen
US5237915A (en) * 1992-02-04 1993-08-24 The Mead Corporation Mixed roll calender
FI96334C (fi) * 1993-11-24 1996-06-10 Valmet Paper Machinery Inc Menetelmä paperin tai vastaavan rainamateriaalin kalanteroinnissa ja menetelmää soveltava kalanteri

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1101500C (zh) * 1997-05-07 2003-02-12 韦尔梅特公司 控制砑光机轧点载荷的方法和装置
EP0882838A1 (fr) * 1997-06-05 1998-12-09 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calandre
EP0972880A3 (fr) * 1998-07-16 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Calandre pour bandes de papier ou analogue
EP0972877A3 (fr) * 1998-07-16 2000-05-17 Voith Sulzer Papiertechnik Patent GmbH Calandre pour bandes de papier ou analogue
US6325960B1 (en) 1998-07-16 2001-12-04 Voith Sulzer Papiertechnik Patent Gmbh Calender for fibrous material webs and method of operating same
US6336398B1 (en) 1998-07-16 2002-01-08 Voith Sulzer Papiertechnik Patent Gmbh Calender for webs of paper or a similar material

Also Published As

Publication number Publication date
DE19511145A1 (de) 1996-10-02
DE59607248D1 (de) 2001-08-16
EP0735185A3 (fr) 1998-05-06
EP0735185B1 (fr) 2001-07-11
US5662037A (en) 1997-09-02
DE19511145C2 (de) 2000-07-13

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