EP2278067A1 - Calandre destinée au traitement d'une bande de matériau - Google Patents

Calandre destinée au traitement d'une bande de matériau Download PDF

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Publication number
EP2278067A1
EP2278067A1 EP10007055A EP10007055A EP2278067A1 EP 2278067 A1 EP2278067 A1 EP 2278067A1 EP 10007055 A EP10007055 A EP 10007055A EP 10007055 A EP10007055 A EP 10007055A EP 2278067 A1 EP2278067 A1 EP 2278067A1
Authority
EP
European Patent Office
Prior art keywords
calender
web
roller
paper
belt
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
EP10007055A
Other languages
German (de)
English (en)
Other versions
EP2278067B1 (fr
Inventor
Peter Dr. Svenka
Bernhard Dr. Brendel
Eduard Dr. Davydenko
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters 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 Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of EP2278067A1 publication Critical patent/EP2278067A1/fr
Application granted granted Critical
Publication of EP2278067B1 publication Critical patent/EP2278067B1/fr
Not-in-force legal-status Critical Current
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
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/0066—Calenders; Smoothing apparatus using a special calendering belt

Definitions

  • the invention relates to a calender for smoothing a paper or board web according to the preamble of claim 1.
  • a device for drying a fibrous web which can be used simultaneously for calendering.
  • a metal belt calender with an extended nip is provided.
  • a surface pressure of about 0.01 MPa is maintained.
  • Both the roller and the metal belt can be heated so that both sides of a web can be smoothed.
  • the use of the metal strip allows the application of elevated temperatures of more than 100 ° C and even high up to about 400 ° C. This elevated temperature, along with a long application time and a wide pressure control range, gives a good calendering result. Because of the metal band, however, the effects correspond to those of a Hartnipkalanders, ie, the track tends to Mottling. The use of high temperatures is again cost and energy consuming.
  • a calender and a method for calendering are known in which two wide nips formed with circumferential bands are interrupted by at least one shorter nip.
  • the shorter nip is pressurized usually higher applied.
  • the first wide nip serves in the Essentially the heat supply.
  • the short press nip causes a smoothing pulse on the web.
  • the second wide nip serves to even out the smoothness effect while simultaneously cooling the web.
  • Preference is given to a metal strip, which should be advantageous for the entry of heat because of the high thermal conductivity.
  • the application of high temperatures of up to 300 ° C is provided, and this applies in particular to the first wide nip.
  • the disadvantages of high temperatures already described must therefore also be accepted here.
  • Object of the present invention is to provide a calender that smoothes a paper or board web volume-saving and thereby can be operated cost and energy saving.
  • a calender in which the paper or board web before entering the nip passes through a pre-treatment line for generating an optimum temperature profile when smoothing in the nip.
  • the roll surface temperature of the heated rolls needs to be selected only slightly higher than the plasticizing temperature of the respective paper or board web at a selectable moisture content. For example, it is possible to smooth out with a roller surface temperature which is only about 10 to 30 ° C. higher.
  • the extended residence time in conjunction with the elastic surface of the circulating belt significantly improves the heating of the paper or board web. It ensures a good heat transfer, since the paper or board web is pressed evenly to the heatable roller, so that, for example, air cushion, which could hinder the heat transfer, are largely avoided.
  • the advantages of the proposed calender thus result from the extended dwell path for heating the web in conjunction with the formation of the circulating belt, which forms a contact surface of the treatment gap.
  • the contact pressure is adjusted by the tension of the belt.
  • This tangential tension of the belt loads the belt, which usually consists of a plastic, a rubber, a plastic-coated carrier material or a rubber-coated carrier material, far less than a radial tension.
  • the belt usually consists of a plastic, a rubber, a plastic-coated carrier material or a rubber-coated carrier material, far less than a radial tension.
  • the plastic tends to delaminate a layer composite.
  • the thermal stress of the belt is low, so that the belt has a long life.
  • a volume-smoothing smoothing is thus achieved with a nip upstream treatment gap whose belt has a resilient or soft surface on the paper or board web side facing, said treatment gap in the manner of a broad nip in contrast to the known broad nips in the low temperature range of, for example 80 ° C to 160 ° C is operated.
  • the resulting energy savings result from reduced heat radiation and reduced forced convection.
  • the heat loss is significantly reduced, in particular, when the circulating belt has a closed surface cover on the side facing the paper or board web.
  • the thermally sealing and shielding effect of the circulating belt on the paper or board web in the treatment nip is increased.
  • a further increase can be achieved by the material of the elastic surface, which can act as a thermal insulator.
  • this material preferably has a low thermal conductivity.
  • a residence time in the treatment gap required for achieving the desired penetration depth of the heat can be optimized by adjusting the contact pressure of the strip to the circumference of the heatable roll by means of guide rolls.
  • the counter-element forming the nip is preferably arranged directly behind the treatment gap on the heatable roller. Preference is given to the use of a bending adjustment roller for simultaneous control of the property profiles of the web in the transverse direction.
  • the counter element is a hard heatable roller, since a two-sided smoothing is desired.
  • the line load can be adapted to the respective objective.
  • a controlled increase in pressure in the treatment gap can be adjusted by guide rollers for the circulating belt additionally work as pressure rollers.
  • the invention relates to a calender 1 for smoothing a paper or board web 2 with at least one nip 3, which is formed between a heatable roller 4 and a counter element 5.
  • the counter element 5 is a roller, in particular a Biegeeinstellwalze, for simultaneous control of the property profiles of the web 2 in the transverse direction.
  • the counter element 5 is formed as a hard roller, which is heated in order to smooth the paper or board web 2 on both sides.
  • the nip length of the nip 3 is preferably in the range of 1 to 15 mm, with a counter element 5 as a hard roller.
  • the roller 4 as well as the counter element 5 can each be driven, in particular for the online operation of the calender.
  • the heatable roll 4 is heated, for example, to roll surface temperatures of 80 ° C to 160 ° C depending on the plasticizing temperature of the respective paper or board web 2 and their moisture content.
  • the calender 1 comprises a device 6 for generating a predetermined pressure in the nip 3.
  • the device 6 for generating a predetermined pressure is here for example a loading cylinder.
  • the counter element 5 may be formed with an inner stroke, whereby a pressure load in the nip 3 is adjustable.
  • the nip 3 is in the web running direction L, a web treatment device 7 with two treatment gap 8 forming contact surfaces 9, 10 upstream.
  • the contact surface 9 is a circumferential contact surface, which is formed by a belt 14 circulating on guide rollers 11, 12, 13.
  • the other contact surface 10 is formed by the circumferential outer wall of the heatable roller 4.
  • the treatment gap 8 extends along a degree 15 of the wrapping of the heatable roller 4.
  • the degree 15 of the wrapping for varying the length of the treatment gap 8 is adjustable depending on a desired penetration depth of the heat in the paper or board web 2.
  • the contact length at the circumference of the roller 4 is preferably variably adjustable from 0.25 to 2.5 m.
  • the circulating belt 14 presses with an elastic surface to increase the thermal efficiency of heat transfer the paper or board web 2 to the heatable roller 4.
  • the guide rollers 11, 12, 13 control Trum estimate the circulating belt 14 in the treatment gap. 8
  • the contact pressure in the treatment gap 8 is adjusted by the tension of the belt 14.
  • the maximum tensile stress of the belt 14 is limited to preferably 200 kN / m.
  • the compressive stress which can be achieved in the pretreatment zone of the treatment gap 8 can, for example, assume a value in the range from 0.01 MPa to 0.5 MPa. This depends on the belt tension and the dimensions of the heatable roller 4.
  • the web 2 Before entering the treatment gap 8, the web 2 can wrap around the heatable roller 4 along a partial section.
  • the surface temperature of the heatable roller 4 is preferably controlled so that within the residence time of the web 2 below the belt 14, the glass transition temperature is achieved in an optimum for the respective objective of the smoothing process penetration depth. For volume-saving smoothing such warming is required only to a depth of about 10 microns.
  • the surface temperature and the length of the pretreatment path of the treatment nip 8 are optimized to allow operation at a temperature that does not significantly exceed the glass transition temperature of the surface area of the web 2 to be plasticized.
  • the thus pretreated web 2, which can be moistened before the calender 1 previously with nozzle and / or steam humidifier is just behind the pretreatment track in the nip 3, a hard nip, smoothed.
  • the nip 3 forming counter-element 5 is a roller which is disposed immediately behind the looped portion on the heatable roller 4. Moistening behind the calender 1 is also possible if this is technologically necessary.
  • the counter-element 5 is a roller whose diameter is preferably less than or equal to 90% of the diameter of the heatable roller 4. In this way, the distance between the end of the treatment gap 8 and the inlet into the nip 3 should be kept as small as possible.
  • the circulating belt 14 has an elastic surface for ensuring a uniform contact pressure, which is adjustable by the tension of the belt 14.
  • the circulating belt 14 on the paper or board web 2 side facing an elastic surface having a closed surface cover.
  • the heat transfer from the heated roll 4 to the paper or board web 2 is thermally shielded from the environment in the treatment nip 8 by the circulating belt formed in this way.
  • the introduction of heat into the paper or board web 2 is improved because heat dissipation to the environment is reduced. If the elastic surface is a thermal insulator, the introduction of the heat into the paper or board web 2 is further improved.
  • the elastic surface of the circulating belt 14 therefore preferably consists of a material with a thermal conductivity of less than or equal to 10 W / mK, in particular less than or equal to 5 W / mK, very preferably less than or equal to 1 W / mK.
  • the band 14 is preferably made of a material having a thermal conductivity less than or equal to 1 W / mK.
  • the hardness of the elastic surface is preferably in the range of 50 Shore A to 92 Shore D.
  • the band 14 is preferably made of a flat substrate provided with one or more elastic layers. Such a plastic composite material has a high tensile strength. To increase the mechanical strength of the band, a support fabric or support band can be incorporated.
  • the circulating belt 14 may further consist of a substrate provided with an elastic layer, wherein the carrier material may also consist of a metal.
  • the hardness of the metal can provide for a sufficiently thin elastic layer for a smoothing of the circumferential band 14 facing side of the paper or board web 2.
  • the roughness of the elastic surface of the band 14 is preferably in the range of 0.5 to 5 microns.
  • the then given smoothness of the elastic surface of the belt 14 may be reflected as smoothness on the paper or board web 2.
  • the tape 14 has, for example, a heat-resistant surface coating, for example made of silicone. The heat-resistant coating provides high wear resistance and a smooth surface.
  • the pretreatment path of the treatment gap 8 also serves, in particular, for pre-smoothing the web 2.
  • the circulating belt 14 further preferably has only a small elongation which is less than or equal to 7%. The strain occurring when adjusting the belt tension in the belt 14 due to tension in the belt 14 then does not disturb the smoothing.
  • the band 14 has at least the same width as the web 2. The thickness of the band 14 depends on its width and length and may be between 4 and 20 mm.
  • At least one of the guide rollers 12 has a device 16 for selectively tensioning the belt 14.
  • the guide roller 12 for tensioning the belt 14 is in each case displaceably or pivotably mounted on the end by means of a guide 18.
  • Fig. 2 shows as a guide 18 a lever system. On the lever system acts a drive element 20, which is associated with a not shown path measuring device.
  • At least one of the guide rollers 11, 13 may be formed as a pressure roller, which presses the web 14 in the treatment gap 8 along a portion in the direction L by additional radial pressure load.
  • a guide roll 11, 13 is preferably formed on the inlet and / or outlet side of the treatment gap 8 as a pressure roller.
  • the radial pressure load can be set lower on the inlet side than the outlet side or vice versa.
  • Such a pressure roller may be a Biegeeinstellwalze.
  • Fig. 1 and Fig. 2 show a calender 1, in which the band 14, the heatable hard roll 4 wraps more than 180 °.
  • the degree 15 of the wrap is at values between 90 ° and 270 °, with the values greater than or equal to 120 ° being particularly preferred.
  • the circulating, endless belt 14, which is also referred to as belt, is guided by three guide rollers 11, 12, 13 in a loop around the heatable roller 4.
  • the belt 14 is tensioned here by the guide roller 12.
  • the contact pressure of the belt 14 is determined to the web 2.
  • a higher tension of the belt 14 also results in a higher contact pressure of the web 2 and favors the leveling of the web surface, ie the pre-smoothing.
  • the path 2 conditioned in the treatment gap 8 is then finally finished in a nip 3 immediately following and formed with the same heatable roller 4.
  • the line load in nip 3 can be adapted to the smoothness effects to be achieved.
  • Medium compressive stresses with paper or cardboard in the nip 3 of 2 N / mm 2 to 55 N / mm 2 are adjustable.
  • the compressive stresses in the lower area of said area are used for thickness correction in cardboard.
  • the compressive stresses in the upper area of said range allow the smoothing of high-quality papers, such as SC, LWC and MWC papers or wood-free coated papers.
  • the temperature of the heated roller 4 and the length of the treatment section formed under the belt 14 are adjusted so that substantially only the area near the surface of the web 2 is heated, a conditioning line is formed. in which the interior of the web 2 remains below the plastication or glass transition temperature. As a result, a volume-smoothing smoothing is possible.
  • the thickness of the near-surface layer of the web 2, which is brought above the plasticizing temperature is several times the largest unevenness of the paper or board web surface. The thickness of the layer to be heated is thus dependent on the roughness of the web 2 to be treated.
  • the length of the treatment gap 8 and the speed of the web 2 in the direction L determine the residence time of the web 2 in the treatment gap 8 and thus also the penetration depth of the heat into the web 2 and the layer thickness which is heated to a deformation temperature.
  • the ambient air entrained with the web 2 in the boundary layer degrades the heat transfer from the heated roll 4 to the web 2.
  • Substantial improvement in heat transfer is achieved by removal of the boundary layer. This can be done, for example, by a contact path for an adhesive contact between the outer wall of the heatable roller 4 and the surface of the paper or board web 2 upstream of the web treatment device 7. Also suitable is the pressing of a guide roller 11 against the heated roller 4. By these measures, the interfering boundary layer displaced against the direction of the web 2 and the heat transfer in the treatment gap 8 can be further increased.
  • the calender 1 can be operated online or offline.
  • the calender 1 makes it possible to give the surface of the web 2 a high smoothness, wherein the circulating belt 14 is mechanically or thermally stressed low.
  • the two-sided guides a control roller via a transversely to the direction of the belt provided sensor means controlled to each other can be aligned.
  • the sensor device detects the position of the belt 14 toward the center of the heatable roller 4.

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  • Paper (AREA)
  • Advancing Webs (AREA)
EP10007055A 2009-06-30 2009-06-30 Calandre destinée au traitement d'une bande de matériau Not-in-force EP2278067B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09008507A EP2270280B1 (fr) 2009-06-30 2009-06-30 Calandre destinée au traitement d'une bande de matériau

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP09008507.7 Division 2009-06-30

Publications (2)

Publication Number Publication Date
EP2278067A1 true EP2278067A1 (fr) 2011-01-26
EP2278067B1 EP2278067B1 (fr) 2011-11-23

Family

ID=41259134

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10007055A Not-in-force EP2278067B1 (fr) 2009-06-30 2009-06-30 Calandre destinée au traitement d'une bande de matériau
EP09008507A Not-in-force EP2270280B1 (fr) 2009-06-30 2009-06-30 Calandre destinée au traitement d'une bande de matériau

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09008507A Not-in-force EP2270280B1 (fr) 2009-06-30 2009-06-30 Calandre destinée au traitement d'une bande de matériau

Country Status (7)

Country Link
US (1) US8545677B2 (fr)
EP (2) EP2278067B1 (fr)
JP (1) JP2012531528A (fr)
CN (2) CN102099527B (fr)
AT (1) ATE534767T1 (fr)
CA (1) CA2765126A1 (fr)
WO (1) WO2011000529A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182037A (zh) * 2011-05-07 2011-09-14 江苏国光重型机械有限公司 宽压区带式压光机
EP2584093A1 (fr) 2011-10-20 2013-04-24 Metso Paper Inc. Système relatif à une chaîne de production d'une bande de fibres

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011004730A1 (de) 2011-02-25 2012-08-30 Voith Patent Gmbh Kalander
DE102011085101A1 (de) 2011-10-24 2013-04-25 Voith Patent Gmbh Bahnbehandlungsvorrichtung
DE102015200380A1 (de) * 2015-01-14 2016-07-14 Voith Patent Gmbh Band für eine Glättvorrichtung, Glättvorrichtung und Verfahren zur Glättung
CN116534630B (zh) * 2023-07-07 2023-09-08 新乡市腾飞纸业有限公司 一种纸张收卷装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141614A2 (fr) 1983-10-24 1985-05-15 Black-Clawson International Limited Traitement de surface du papier et du carton
WO2001071091A1 (fr) * 2000-03-22 2001-09-27 Metso Paper, Inc. Calandre a plusieurs rouleaux et dispositif de calandrage
WO2001098585A1 (fr) 2000-06-20 2001-12-27 Metso Paper, Inc. Procede de calandrage, plus specifiquement de precalandrage et calandre permettant de mettre en oeuvre ledit procede
EP0886695B1 (fr) * 1996-12-06 2002-05-22 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calandre
EP1314821A2 (fr) * 2001-11-24 2003-05-28 Voith Paper Patent GmbH Calandre et procédé de lissage d'une bande fibreuse
EP1478805B1 (fr) 2002-01-29 2008-03-26 Metso Paper, Inc. Procede pour secher une bande fibreuse couchee ou non couchee
DE102007024581A1 (de) 2007-05-25 2008-11-27 Voith Patent Gmbh Kalander und Verfahren zur Satinage von Papier- oder Kartonbahnen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0532455B1 (fr) * 1991-09-12 1996-11-27 Schaetti Ag Installation pour calendrer et/ou laminer des matières textiles en bandes
SE502960C2 (sv) * 1994-06-15 1996-02-26 Nordiskafilt Ab Albany Arrangemang för kalandrering
JPH08199465A (ja) * 1995-01-19 1996-08-06 Asahi Chem Ind Co Ltd 表面平坦性に優れる繊維不織シートの製造方法
US20040134361A1 (en) * 1996-12-06 2004-07-15 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Calender
JP2001316996A (ja) * 2000-05-08 2001-11-16 Mitsubishi Heavy Ind Ltd カレンダ処理装置
US20060060322A1 (en) * 2002-01-29 2006-03-23 Mika Viljanmaa Processing device for processing a coated or uncoated fibrous web
FI20055399A0 (fi) * 2005-07-08 2005-07-08 Metso Paper Inc Järjestely ja menetelmä päättymättömän hihnan tai vastaavan vaihtamiseksi paperi-/kartonkikoneessa tai jälkikäsittelykoneessa

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141614A2 (fr) 1983-10-24 1985-05-15 Black-Clawson International Limited Traitement de surface du papier et du carton
EP0886695B1 (fr) * 1996-12-06 2002-05-22 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calandre
WO2001071091A1 (fr) * 2000-03-22 2001-09-27 Metso Paper, Inc. Calandre a plusieurs rouleaux et dispositif de calandrage
WO2001098585A1 (fr) 2000-06-20 2001-12-27 Metso Paper, Inc. Procede de calandrage, plus specifiquement de precalandrage et calandre permettant de mettre en oeuvre ledit procede
EP1314821A2 (fr) * 2001-11-24 2003-05-28 Voith Paper Patent GmbH Calandre et procédé de lissage d'une bande fibreuse
EP1478805B1 (fr) 2002-01-29 2008-03-26 Metso Paper, Inc. Procede pour secher une bande fibreuse couchee ou non couchee
DE102007024581A1 (de) 2007-05-25 2008-11-27 Voith Patent Gmbh Kalander und Verfahren zur Satinage von Papier- oder Kartonbahnen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182037A (zh) * 2011-05-07 2011-09-14 江苏国光重型机械有限公司 宽压区带式压光机
CN102182037B (zh) * 2011-05-07 2013-03-27 江苏国光重型机械有限公司 宽压区带式压光机
EP2584093A1 (fr) 2011-10-20 2013-04-24 Metso Paper Inc. Système relatif à une chaîne de production d'une bande de fibres

Also Published As

Publication number Publication date
CN102199894B (zh) 2013-09-04
CN102099527A (zh) 2011-06-15
WO2011000529A8 (fr) 2011-04-21
CN102199894A (zh) 2011-09-28
ATE534767T1 (de) 2011-12-15
EP2270280A1 (fr) 2011-01-05
EP2278067B1 (fr) 2011-11-23
WO2011000529A1 (fr) 2011-01-06
EP2270280B1 (fr) 2013-03-20
JP2012531528A (ja) 2012-12-10
CN102099527B (zh) 2012-11-07
CA2765126A1 (fr) 2011-01-06
US8545677B2 (en) 2013-10-01
US20120090801A1 (en) 2012-04-19

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