EP1314821A2 - Calandre et procédé de lissage d'une bande fibreuse - Google Patents

Calandre et procédé de lissage d'une bande fibreuse Download PDF

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Publication number
EP1314821A2
EP1314821A2 EP02024716A EP02024716A EP1314821A2 EP 1314821 A2 EP1314821 A2 EP 1314821A2 EP 02024716 A EP02024716 A EP 02024716A EP 02024716 A EP02024716 A EP 02024716A EP 1314821 A2 EP1314821 A2 EP 1314821A2
Authority
EP
European Patent Office
Prior art keywords
web
roller
nips
nip
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
EP02024716A
Other languages
German (de)
English (en)
Other versions
EP1314821A3 (fr
EP1314821B1 (fr
Inventor
Rüdiger Dr. Kurtz
Josef Schneid
Thomas Hermsen
Udo Gabbusch
Harald Hess
Rainer Fenske
Alexander Wassermann
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
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
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Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1314821A2 publication Critical patent/EP1314821A2/fr
Publication of EP1314821A3 publication Critical patent/EP1314821A3/fr
Application granted granted Critical
Publication of EP1314821B1 publication Critical patent/EP1314821B1/fr
Anticipated expiration legal-status Critical
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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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the invention relates to a calender for smoothing a Fibrous web, in particular a paper or cardboard web, where the web is passed through several nips, each between a roll surface and one Counter surface are formed.
  • the invention further relates to a method for smoothing a fibrous web, especially a paper or cardboard web, in which the Run the web through at least two nips in succession becomes.
  • WO 95/21962 A1 describes a device for dewatering known a paper web, the corresponding broad nips having.
  • the paper web is together with a Felt tape passed through the wide nip and there with pressure charged with elevated temperature so that the water can change from the paper web to the felt web.
  • the invention has for its object the quality the surface of the web with a volume-saving treatment to improve.
  • This task is in the device of the aforementioned Art solved in that the counter surface by one each by a pressure shoe against the roller surface pressed circumferential coat and the roll surfaces of at least two nips are formed on the same roller.
  • a well-known Breitnip device which is also called Called shoe press, for smoothing a paper or Cardboard web can use.
  • Roller for at least two broad nips With only two So broad nips only a single roller is required, to smooth the web to a greater degree than just in a wide nip. Reduce with only one roller not only the manufacturing and maintenance costs. The space required is also drastically reduced.
  • the coat can be designed in different ways his.
  • One option is to use a relatively stiff jacket that is elastic enough to to adapt to the curvature of the roller, otherwise but practically revolves like a roller. This The jacket can be provided with washers on the face.
  • a another option is to use one less stiff band that runs over support rollers in one revolution is guided, the pulleys practically a polygon define. Such a band can also be relative be thin.
  • a heated broad nip with a heating device and one on it in the direction of web travel following cooled wide nip with a cooling device is provided. This is how you gain knowledge take advantage of that the smoothing process at a Paper or cardboard web can improve if one of the railway supplies heat. One assumes that the heat to at least partially plasticize the surface leads, so that the smooth surface of the Can impress the roller in the paper or cardboard web. However, this surface is still hot very sensitive. If you call the train with the Surface then passes through a chilled wide nip, then the surface properties of the web, so to speak frozen. This shows the special Advantage of using only one roller for both Operations. The surface of the roller used to smooth the Web in the heated nip has been used, too used to freeze the surface properties. When "freezing" can as no quality changes occur that adversely affect the appearance can affect the web.
  • the heating device and the Cooling device on the surface of the roller If the roller rotates, alternately runs through its surface the heated wide nip and the cooled wide nip. If the heating device and the cooling device only lets act on the surface of the roller, then lets this temperature change is relatively easy and with accomplish with little effort. It's not necessary, to apply larger amounts of heat to the roller or remove from it. If you heat the surface or cools, then the heat that the Roller is fed, even in the area of the surface. From there it can be more easily transferred to the train. The same applies to cooling. There, so to speak created a heat sink with the heat from the Web can be removed.
  • the roller preferably has a surface layer with a low heat capacity, that of a carrier body is thermally insulated. You bring so only on the roller as much as for the treatment the train is necessary. Another heating up of the Roll is avoided. This saves energy. The same also applies when cooling the roller. You just cool a comparatively thin surface layer, must do not cool the roller body. In addition to the This procedure has the advantage of saving energy. that an operation with a higher web speed is possible because the roller moves accordingly quickly can turn. The resulting temperature change frequencies are using with a thin surface layer a low heat capacity can be realized.
  • the web speed, the heat capacity of the surface layer and the heat absorption capacity of the web is coordinated are that at the exit of the heated broad nip Heat balance between the web and the roller is practical is completed. You just have to use the roller still cool down from the web temperature, but not remove excess heat in and of itself, the did not get on the train. This is an energy saving one Operation.
  • a web guiding device is arranged which the web lifts off the roller, and the cooling device is arranged in a pocket of the web through which Web guide device is formed.
  • the task is in a method of the aforementioned Art solved in that the nips as wide nips are formed, each between a roller surface and one with a pressure shoe against the Roll surface pressed circumferential jacket formed and the web is heated in the first wide nip and in second Breitnip is cooled.
  • the heating and cooling done using the same roller.
  • the roller surface when smoothing in the heated nip and when freezing the smoothed surface is in the cooled nip So the same, so that comparable in both broad nips Surface influences with regard to the Can achieve smoothness.
  • the roller is preferably merely acted upon their surface thermal. This has the advantage that you only apply or remove heat where it is is required. There is no need for a roller fully heat or cool. So that leaves the temperature change frequency increase and the operating speed increase.
  • a calender 1 for smoothing a fibrous web 2, the hereinafter referred to as "web”, has one Roll 3, which cooperates with two resilient coats 4, 5 and a first wide nip 6 and one second Breitnip 7 forms.
  • the jacket 4 with With the help of a pressure or support shoe 8 against the roller 3 pressed and lies down on a predetermined Circumferential section to the roller 3.
  • the coat 4 must be flexible enough to accommodate the curvature of the To be able to adjust roller 3.
  • the support shoe 8 has one Pressure surface 9, the one on the curvature of the roller 3 has adapted curvature.
  • Lubricant supply devices are arranged, for a low-friction sliding of the jacket 4 over the To ensure support shoe 8.
  • it can is a hydrostatic lubrication.
  • the jacket 4 is guided over support rollers 10, which are only shown schematically.
  • the coat 4 rotates like a roller.
  • the jacket 5 is on the order 180 ° opposite side of the roller 3 by a Support shoe 11 pressed against the roller 3.
  • the coat 5 is also flexible so that under the effect of the Pressure surface 12 of the support shoe 11, the curvature of the curvature of the roller 3 is adjusted against the roller 3 is pressed.
  • the jacket 5 wraps around the roller 3 thereby also over a predetermined circumferential range.
  • the jacket 5 is represented by schematically Support rollers 13 supported and also runs like a roller. The circulation of the two coats 4, 5 and the roller 3 results from the direction of movement 14 of lane 2.
  • a heater 15 is arranged on the surface of the roller 3 acts.
  • the heater 15 is as close as possible in front of the wide nip 6 arranged so that heat loss between the heating the roller 3 and the entry of the surface of the roller 3 kept small in the Breitnip 6, so almost avoided become.
  • the roller 3 has a carrier body 16 which is formed is through a roller tube 17 and one located thereon Plastic layer 18 which is a heat insulator forms. On the outside of the plastic layer 18 a relatively thin surface layer 19 made of a thermally conductive Material, for example a metal, arranged. On the one hand, this surface layer 19 has a high smoothness, but on the other hand only a comparative one low heat capacity.
  • the heating device 15 only heats the surface layer 19 of the roller 3. A heating of the roller tube 17 is avoided by the plastic layer 18, which thermally separates the surface layer 19 from the rest the roller isolated.
  • the heat capacity of the surface layer 19 is chosen so that at a corresponding Speed of web 2 and heat absorption capacity the web 2 a heat balance between the web 2 and the surface layer 19 is at least largely closed is when the web 2 leaves the Breitnip 6.
  • a deflection roller 20 is arranged behind the wide nip 6, over which the web 2 is guided.
  • the cooling device 22 also acts on the surface layer 19 of the roller. For example, it can be chilled Inflate air onto the surface layer. Accordingly is the second Breitnip 7, which the web in the running direction passes behind the first Breitnip 6, cooled. This makes it possible to use the one created in the first wide nip Smoothing the surface so to speak "freeze", i.e. the still unstable condition of the surface at the exit to fix the wide nip 6.
  • a manageable track is available, whose Surface at least on the roller 3 facing Side has a relatively large smoothness.
  • This smoothness is achieved with a volume-saving treatment, because the dwell time in heated Breitnip 6 is relative is high, so there is a relatively long exposure time is, the compressive stresses in the Breitnip 6 but comparatively are low.
  • the arrangement of the cooling device in the pocket 21 has furthermore the advantage that the web 2 are cooled on the side facing the roller 3 can. This prepares the surface for "freezing" in front.
  • the heating device 15 can work inductively, for example.
  • the use of hot air is also possible.
  • the surface layer 19 to apply the roller 3 with infrared radiation.
  • the top was already chilled Air mentioned.
  • contact cooling is also possible make, for example, the surface of the Roll off surface layer 19 on a cooled counter roller allow.

Landscapes

  • Paper (AREA)
EP20020024716 2001-11-24 2002-11-06 Calandre et procédé de lissage d'une bande fibreuse Expired - Lifetime EP1314821B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001157691 DE10157691B4 (de) 2001-11-24 2001-11-24 Kalander und Verfahren zum Glätten einer Faserstoffbahn
DE10157691 2001-11-24

Publications (3)

Publication Number Publication Date
EP1314821A2 true EP1314821A2 (fr) 2003-05-28
EP1314821A3 EP1314821A3 (fr) 2004-01-02
EP1314821B1 EP1314821B1 (fr) 2006-12-27

Family

ID=7706845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020024716 Expired - Lifetime EP1314821B1 (fr) 2001-11-24 2002-11-06 Calandre et procédé de lissage d'une bande fibreuse

Country Status (2)

Country Link
EP (1) EP1314821B1 (fr)
DE (2) DE10157691B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1688537A1 (fr) * 2005-02-04 2006-08-09 Voith Paper Patent GmbH Calandre
EP2270280A1 (fr) * 2009-06-30 2011-01-05 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007055734A1 (de) 2007-12-10 2009-06-18 Voith Patent Gmbh Bahnbehandlungsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322876A1 (de) * 1993-07-09 1993-11-18 Voith Gmbh J M Vorrichtung zum Glätten einer Papierbahn oder Kartonbahn
WO1998044196A1 (fr) * 1997-04-02 1998-10-08 Valmet Corporation Procede de calandrage et calandre utilisant ledit procede
WO2001016424A1 (fr) * 1999-08-27 2001-03-08 Metso Paper, Inc. Cylindre a semelle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439559A (en) * 1994-02-14 1995-08-08 Beloit Technologies Heavy-weight high-temperature pressing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4322876A1 (de) * 1993-07-09 1993-11-18 Voith Gmbh J M Vorrichtung zum Glätten einer Papierbahn oder Kartonbahn
WO1998044196A1 (fr) * 1997-04-02 1998-10-08 Valmet Corporation Procede de calandrage et calandre utilisant ledit procede
WO2001016424A1 (fr) * 1999-08-27 2001-03-08 Metso Paper, Inc. Cylindre a semelle

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1688537A1 (fr) * 2005-02-04 2006-08-09 Voith Paper Patent GmbH Calandre
EP2270280A1 (fr) * 2009-06-30 2011-01-05 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau
WO2011000529A1 (fr) * 2009-06-30 2011-01-06 Andritz Küsters GmbH & Co. KG Calandre servant au traitement d’un produit en bande
EP2278067A1 (fr) * 2009-06-30 2011-01-26 Andritz Küsters GmbH Calandre destinée au traitement d'une bande de matériau
CN102199894A (zh) * 2009-06-30 2011-09-28 安德里茨库斯特斯有限责任公司 用于处理产品幅的砑光机
CN102199894B (zh) * 2009-06-30 2013-09-04 安德里茨库斯特斯有限责任公司 用于处理产品幅的砑光机
US8545677B2 (en) 2009-06-30 2013-10-01 Andritz Kusters Gmbh Calender for treating a product web

Also Published As

Publication number Publication date
EP1314821A3 (fr) 2004-01-02
DE10157691B4 (de) 2005-12-22
DE50209066D1 (de) 2007-02-08
DE10157691A1 (de) 2003-06-12
EP1314821B1 (fr) 2006-12-27

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