EP0928844A2 - Calandre à papier et son procédé d' opération - Google Patents

Calandre à papier et son procédé d' opération Download PDF

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Publication number
EP0928844A2
EP0928844A2 EP98124391A EP98124391A EP0928844A2 EP 0928844 A2 EP0928844 A2 EP 0928844A2 EP 98124391 A EP98124391 A EP 98124391A EP 98124391 A EP98124391 A EP 98124391A EP 0928844 A2 EP0928844 A2 EP 0928844A2
Authority
EP
European Patent Office
Prior art keywords
stack
force
roller
characteristic curves
devices
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.)
Withdrawn
Application number
EP98124391A
Other languages
German (de)
English (en)
Other versions
EP0928844A3 (fr
Inventor
Dirk Dipl.-Ing. Cramer
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
Voith Sulzer Papiertechnik 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
Application filed by Voith Paper Patent GmbH, Voith Sulzer Papiertechnik Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP0928844A2 publication Critical patent/EP0928844A2/fr
Publication of EP0928844A3 publication Critical patent/EP0928844A3/fr
Withdrawn legal-status Critical Current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
    • 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 paper calender a stack of rollers arranged one above the other from an upper stack and a lower stack, each can be loaded by the upper and lower force transducers are, with a common center roller, which is supported on the frame is, the remaining center rollers on levers are mounted, which can be swiveled around fixed axes and resilient by means of force introduction are, as well as a method for operating this calender.
  • Such a paper calender is known from DE 195 11 143 A1.
  • the common center roll is a bend adjustment roll with jacket stroke, whose jacket by an upper pressure bearing support and a lower pressure bearing Support device on a penetrating the jacket supported support fixed to the frame is.
  • the paper web is guided so that it is in the top stack with one side and in the sub-stack with the other Side rests on hard rollers for smoothness of the paper are responsible.
  • the weight of the overhanging parts can be compensated. Because of the Roll weight have the load characteristics in the top stack and in the sub-stack a negative slope, i.e. the line loads take up both in the top stack and in the sub-stack from top to bottom from gap to gap to.
  • WO 95/14813 is a paper calender with a roll stack known, in which all the center rolls, the between an upper and a lower end roller located on levers. These levers are resilient by means of force introduction, the are so strong that they are more than the whole Weight of the roller and the parts connected to it compensate for assets. This way not only load characteristics with a negative slope, but also achieve those with a positive slope.
  • the invention is therefore based on the object Improve paper web finishing.
  • This construction is based on two things influence the load characteristic.
  • the characteristics of the upper and lower stacks completely separate and especially offset from each other can be set.
  • the slope of the Characteristic curves in the upper and lower stacks each in a large one, including the positive slope Range can be selected.
  • the devices for applying force act bilaterally, i.e. not only relieving, but can also be stressful what offers even more customization options.
  • One method of operating such a calender is characterized in that the load characteristics in Top stack and bottom stack set differently become.
  • the settings depend on the special Paper and the desired properties.
  • the characteristic curves preferably have different ones Slope, especially opposite slope.
  • Another preferred embodiment provides that the characteristic curves are different sections Have slope.
  • the calender illustrated in Fig. 1 has one Roll stack 1, which consists of eight rolls 2 to 9, namely a heatable, deflection controllable hard top end roller 2, a soft center roller 3, a heatable hard center roll 4, one soft center roll 5, a deflection controllable soft center roll 6, a heatable hard center roll 7, a soft center roll 8 and a heatable, deflection-controllable, hard, lower end roller 9.
  • a paper web 17 is fed from a paper machine, passes under the guidance of idlers 18 the working column 10 to 12, the alternating gap 16 and the working column 13 to 15, whereupon it in a Be wound up winding device.
  • the top three Working columns 10 to 12 is the paper web with the one side, in the three lower working columns 13 to 15 with the other side on the center rollers, so that the desired surface structure on both sides, for example Gloss or smoothness.
  • the upper end roller 2 and the lower end roller 9 are as Bending adjustment rollers are formed, in which the roller shell 19 by a series of support elements 20 a non-rotatable support 21 are supported. Also the Center roller 6 is designed as a bending adjustment roller, the jacket 22 via an upper support device, formed by a series of support elements, and one lower support device 24, formed by a row of support elements, on a non-rotatable and frame-fixed Support 25 is supported.
  • This middle roller 6 is designed with jacket stroke, i.e. the jacket 22 is as The whole can be adjusted relative to the carrier 25.
  • Such bend adjustment rollers are known, for example in the Form of NIPCO rolls.
  • the support elements can also be replaced by other known support devices.
  • the middle roller 6 is common and who each work with their own load characteristic can.
  • the upper stack 26 is by upper force transducers K1 loaded by the upper lifting cylinder 28 and Support device 23 are formed, the sub-stack 27th by lower force transducers K2, through the support device 24 are formed, the sub-stack 27 against the Presses piston 29 held in place during operation.
  • rollers 3, 4, 5, 7 and 8 are with their journals mounted on levers 30 which are fixed to the frame Pivots 31 are pivotable.
  • a device 32 for force application in resilient in the form of a piston-cylinder unit the effect of the weight of the associated roller and others parts carried thereby, such as the guide roller 18, compensated and therefore influence the load characteristic takes.
  • These devices 32 are connected via two connecting lines 33 and 34 supplied with hydraulic fluid and therefore can pull the lever down as well load upwards.
  • the carrier can lower end roller 9 lowered by means of the lifting cylinder 29 become. This will lower the levers 30 stored center rollers 3, 4, 5, 7, 8 from until the Rest the lever on a not illustrated stop, while the common center roll 6 sinks until the jacket stroke ended with an internal stop is.
  • One or more of the hard rollers 2, 4, 7, 9 can be heated, as indicated by the arrows H1 to H4 is.
  • the heating energy can be by induction or others kind are supplied, for example by electrical Resistance heating, by radiant heating, with the help of a heat transfer medium and the like.
  • a control unit 35 coordinates the individual parameters paper web treatment. So, besides the heating energy H1 to H4 set the force P with which the upper one Force generator K1 presses the upper end roller 2 down, the lower end roller 9 is held fixed to the frame. The load can also be applied in the opposite direction, where the force P acts on the lower end roller and the upper end roller 2 is mounted fixed to the frame. Further there is the possibility of the intermediate roller 6 as Solid roller to be fixed to the frame and upper power transmitter on the upper end roller 2 and lower power transmitter on the to let lower end roller 9 act.
  • the support elements in rollers 2, 6 and 9 are individually or in zones Pressures p1, p2, p3 and p4 fed to all three Bend adjustment rollers ensure that over the length the rollers have a uniform compressive stress.
  • the support devices 23 and 24 the common center roller 6 controlled so that the upward forces are slightly larger than that downward forces.
  • the working column 10 to 12 in the upper part of stack 1 and the working column 13 to 15 in the lower part of the stack 1 are therefore decoupled from each other in terms of pressure.
  • the devices 32 for applying force to the lever 28 are fed with the pressures z1, z2, z3, z4 and z5, whereby depending on the size of the print and its Direction the line load in the adjacent working columns being affected. All the above sizes will be specified by the control unit 35 and can be from set it regardless of the other sizes.
  • Fig. 2 shows load characteristics of the calender, ie the line load f depending on the individual Working columns.
  • a family of curves A for the top stack 26 shows that the characteristic curve has a negative slope (A1) or a positive slope (A2) and a variety of values in between.
  • a family of characteristics B can be used for the sub-stack 27 characteristic curves with positive slope (B1) and characteristic curves with negative slope (B2) and a variety of have characteristic curves in between.
  • every single characteristic curve is shifted horizontally, as illustrated by dashed lines under A 'and B' is.
  • Dash-dotted lines are one way of setting a characteristic curve C illustrated from above down a section C1 with a positive slope, a jump section C2 and a section C3 with negative, but has a comparatively small slope.
  • Characteristic curves D are also possible, in which sections different in the area of the top stack Have slope, which is also in the area of the lower stack 27 can be realized. Hence leave choose the individual characteristics so that an optimal one Treatment of the paper is done.

Landscapes

  • Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP98124391A 1998-01-08 1998-12-22 Calandre à papier et son procédé d' opération Withdrawn EP0928844A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19800331A DE19800331A1 (de) 1998-01-08 1998-01-08 Papierkalander und Verfahren zu dessen Betrieb
DE19800331 1998-01-08

Publications (2)

Publication Number Publication Date
EP0928844A2 true EP0928844A2 (fr) 1999-07-14
EP0928844A3 EP0928844A3 (fr) 2000-06-07

Family

ID=7854102

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98124391A Withdrawn EP0928844A3 (fr) 1998-01-08 1998-12-22 Calandre à papier et son procédé d' opération

Country Status (4)

Country Link
US (1) US6129011A (fr)
EP (1) EP0928844A3 (fr)
CA (1) CA2258136A1 (fr)
DE (1) DE19800331A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176251A1 (fr) * 2000-07-27 2002-01-30 Voith Paper Patent GmbH Procédé pour le calandrage d'une bande
EP1731667A1 (fr) * 2005-06-07 2006-12-13 Andritz Küsters GmbH & Co. KG Procédé pour le calandrage d'une bande et calandre correspondante

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2288264C (fr) * 1997-05-07 2008-10-07 Valmet Corporation Procede et disposition permettant de calculer et de reguler la distribution de charge lineaire dans une calandre a multiples pinces et calandre a multiples pinces
FI116855B (fi) * 2002-06-06 2006-03-15 Metso Paper Inc Järjestely telanippien sulkemiseksi

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014813A1 (fr) * 1993-11-24 1995-06-01 Valmet Paper Machinery Inc. Procede de calandrage de papier ou d'un materiau en bande similaire et calandreuse permettant sa mise en oeuvre
EP0661405A1 (fr) * 1993-12-29 1995-07-05 Valmet Paper Machinery Inc. Calendrier
DE19511145A1 (de) * 1995-03-27 1996-10-02 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Papierbehandlung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016819A (en) * 1960-02-25 1962-01-16 Mckiernan Terry Corp Super calender with constant nip alignment
DE3640161A1 (de) * 1985-12-23 1987-07-02 Escher Wyss Gmbh Vorrichtung zum zueinander positionieren von walzenflaechen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014813A1 (fr) * 1993-11-24 1995-06-01 Valmet Paper Machinery Inc. Procede de calandrage de papier ou d'un materiau en bande similaire et calandreuse permettant sa mise en oeuvre
EP0661405A1 (fr) * 1993-12-29 1995-07-05 Valmet Paper Machinery Inc. Calendrier
DE19511145A1 (de) * 1995-03-27 1996-10-02 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Papierbehandlung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176251A1 (fr) * 2000-07-27 2002-01-30 Voith Paper Patent GmbH Procédé pour le calandrage d'une bande
EP1731667A1 (fr) * 2005-06-07 2006-12-13 Andritz Küsters GmbH & Co. KG Procédé pour le calandrage d'une bande et calandre correspondante

Also Published As

Publication number Publication date
EP0928844A3 (fr) 2000-06-07
CA2258136A1 (fr) 1999-07-08
US6129011A (en) 2000-10-10
DE19800331A1 (de) 1999-07-15

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