EP2913435B1 - Calandre - Google Patents

Calandre Download PDF

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Publication number
EP2913435B1
EP2913435B1 EP15160553.2A EP15160553A EP2913435B1 EP 2913435 B1 EP2913435 B1 EP 2913435B1 EP 15160553 A EP15160553 A EP 15160553A EP 2913435 B1 EP2913435 B1 EP 2913435B1
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EP
European Patent Office
Prior art keywords
roller
soft
hard
roll
product sheet
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.)
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Application number
EP15160553.2A
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German (de)
English (en)
Other versions
EP2913435A1 (fr
Inventor
Klaus Kubik
Helmut BRUDER
Udo KRÖLLS
Karl-Heinz MONTAG
Johannes Walterfang
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
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Andritz Kuesters GmbH
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Publication date
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Publication of EP2913435A1 publication Critical patent/EP2913435A1/fr
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Publication of EP2913435B1 publication Critical patent/EP2913435B1/fr
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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 calenders for treating a web having a plurality of rolls, wherein at least one hard roll is provided which forms two nips with two soft rolls, wherein the hard roll is heated.
  • a calender is for example from the DE 196 50 576 A1 already known.
  • Such calenders serve the Doppelkalandr réelle of webs.
  • a roller With a soft roll, a roller is referred to, which has an elastic covering or covering.
  • a hard roll is meant a roll without such a reference.
  • the elastic covers or elastic coverings are sensitive to high rollover frequency and temperature. Even large line forces claim the pads by walking enormously. Therefore, in high performance calenders (high line force and temperature at maximum speed) two soft rolls are used, which, together with another roll, form two nips to achieve the desired effect in one pass, ie in one pass of the web through the two nips achieve.
  • the EP 1 516 955 A1 shows a roll stack with a middle, hard roll and three, evenly distributed over the circumference of the hard roll, soft rolls.
  • the US 4,128,053 A discloses a supercalender in which the operative planes of the soft roll with the hard roll are at an angle to each other which is less than 180 °.
  • the US 3,610,137 A shows a calender with a central roller and arranged evenly around the circumference of this central roller arranged outer rollers.
  • the FR 2 061 929 A5 discloses a remote control of the pressure of press rolls to lift the rolls as they pass through a larger gauge section of material.
  • a disadvantage of known calenders is that the soft rolls are still exposed to a large thermal load and unevenness in a nip, for example due to the passage of a thick part, such as a seam, have great effects on the other nip.
  • the invention has set itself the task of creating such a calender and a method without these disadvantages.
  • the calender according to the invention for the treatment of a web has a plurality of rolls, wherein at least one hard roll is provided, which forms two nips with two soft rolls. It is conceivable that a plurality of hard rolls are provided, each forming two nips with two soft rolls. Preferably, however, exactly one hard roller is provided, which forms two nips with two soft rolls.
  • the at least one hard roller is preferably heated.
  • the working planes of the soft rolls with the hard roll are at an angle ⁇ to each other which is smaller than 180 °. By working planes of the soft roll with the hard roll is meant the planes defined by the axis of rotation of the hard roll and the axis of rotation of the respective covering roll.
  • the thermal load of the soft rolls through the hard roll is reduced due to convection. If the planes of action of the two soft rolls with the hard roll are at an angle to each other which is less than 180 °, in other words if, therefore, the two working planes of the two soft rolls do not coincide in a single plane, then unevennesses in one effect Nip less pronounced on the other nip.
  • the axis of rotation of the hard roll is higher than the axis of rotation of at least one of the soft rolls, preferably as the axes of rotation of the two soft rolls.
  • the thermal load of the soft rolls can be reduced by the hard roll due to convection.
  • the axes of rotation of the two soft rolls are at a height, then, in particular if, as is preferred, the diameter of the two soft rolls coincides, a particularly uniform low thermal load of the soft rolls results.
  • the hard roll is arranged evenly over both soft rolls, so if both active planes are turned by amount by the same angle from the horizontal ,
  • the nips are preferably independently controllable.
  • the line force in the one nip can preferably be controlled or regulated independently of the line force in the other nip.
  • the angle ⁇ is between 110 ° and 70 °, and more preferably about 90 °.
  • the two planes of action are perpendicular to each other.
  • irregularities or a changed line force in one nip have the least possible effect on the other nip.
  • Due to the 90 ° arrangement the nips can be (almost) independently varied without influencing each other. This has great advantages, in particular during seaming. Because it is a prerequisite for the following sequence created: The first nip opens, passes through the thick place and closes immediately.
  • the thick places can be thick places extending vertically or obliquely to the feed direction over the entire width of the material web, such as seams, for example, or thickenings occurring only in a region of the material web.
  • the web speed is regularly through the rotational speed of the rollers known or can be determined by a speed sensor.
  • a control device uses the values of the thickset sensor and the web speed to calculate the point in time at which the thick point passes through the nips and shortly before each time reduces the line force of the respective nip in such a way that the nips can be passed through without any damage be caused.
  • the line force is only reduced for a short period of time. In this way it is ensured that, for example, the passage of seams through the nips causes no damage to the calender and on the other hand, the distance of the web, which was not pressurized to a desirable extent, is as small as possible.
  • the change in the line force in the nip is preferably carried out by pressure change of a soft roll.
  • the control device preferably reduces the line forces of the nips such that the times in which the line forces of the two nips are reduced, do not overlap. This is possible because the 90 ° arrangement prevents the line forces from interfering with each other.
  • At least one of the soft rolls is deflection controllable.
  • at least one of the two soft rolls, preferably both of the soft rolls is a floating roll.
  • a floating roller a roller is meant, with a circumferential roller forming the working roll circumference and a non-rotatable crosshead, which passes through the length of the roll and is circumferentially spaced from the inner circumference of the hollow roller.
  • at least one pressure chamber which can be filled with hydraulic fluid is formed, which is divided by a sealing arrangement.
  • the seal assembly has at the opposite ends of the pressure chamber Endquerdichtungen and along the crosshead and the hollow roller on both sides of the plane of action of the roller extending longitudinal seals in the form of sealing strips.
  • Such a roll is from the DE 38 32 405 C1 known.
  • a floating roller has a steel tube (hollow roller), the design must have a certain hardness or stiffness. It follows that the passage of a thick point through the nip results in a relatively large unevenness in this nip. Because the floating roller, for example, can not be set "point by point" to the expected thick spot. Due to their rigidity, not inconsiderable irregularities arise over the entire length of the nip. In order to reduce the line force in the nip for the thick area, in the case of a floating roller also the change of several pressure parameters is necessary. This takes time. The 90 ° arrangement of the working planes to one another in the preferred embodiment means that in this case the second nip is only slightly affected and the reject distance of the web remains short.
  • At least one of the soft rolls is a stamp-supported roll, preferably with an inner stroke, in which the roll tube preferably simultaneously represents the coating or the cover.
  • the first nip is opened, passes through the thick spot and preferably closes immediately again.
  • the second nip preferably continues to calender until it, too, opens shortly before the seam passes through, allowing the thickening to pass and subsequently also closing again. This means that only a minimum of non-calendered goods is lost.
  • preferably only one pressure ie the pressure of exactly one roller
  • the 90 ° arrangement prevents the line forces from influencing each other.
  • the line forces of the two nips are thus not reduced simultaneously, but with a time delay.
  • the times in which the line forces of the two nips are reduced, preferably do not overlap.
  • the line forces of the nips are preferably varied independently or almost independently.
  • the control of the line force of a nip preferably does not take into account the course of the line force of the other roll gap.
  • the angle ⁇ is not equal to 90 ° and it is in Naphaseturchgang the other line force with adjusted. It is therefore preferred that the pressures of two rolls are adjusted simultaneously and more preferably as a function of one another. This is a complex control process, which takes at least a lot of time and often produces more rejects.
  • the designated as a whole with 100 calender is a three-roll calender with two independently controllable nips for the Doppelkalandr ist of webs, consisting of a heated hard support roller 3 and two deflection controlled or bending controlled rollers 2, 4 with elastic coverings.
  • the hard roller 3 is a heated steel roller in the embodiments shown.
  • the soft rollers 2, 4 are in the embodiments shown to floating rollers with the same diameter. These can also be tempered.
  • Fig. 1 shows a known from the prior art calender, in which all three roll axes are perpendicular to each other in a vertical plane.
  • the disadvantage here is that the thermal load of the upper soft roll 2 by the heated hard roll 3 due to convection, in Fig. 1 represented by wavy arrows, is large.
  • Fig. 2 shows a calender, in which all three roll rotation axes lie in a horizontal plane.
  • the convection again symbolized by corrugated arrows leads to a lower thermal load of the soft rolls, compared with the arrangement in Fig. 1 ,
  • each plane of action can be subdivided into a region 7a or 8a, in which the axis of rotation of the respective soft roller also lies, and into a region 7b or 8b in which there is no further axis of rotation.
  • Fig. 3 shows a calender 100, in which the working plane 7 of a soft roll 2 with the hard roll 3 is at a 90 ° angle to the working plane 8 of the other soft roll 4 with the hard roll 3.
  • the rotation axis 10 of the one soft roll 2 is arranged at a height with the rotation axis 9 of the hard roll 3. Since none of the soft rolls 2, 4 are arranged above the heated hard roll 3, the thermal load of the soft rolls by the hard roll due to convection (again indicated by wavy arrows) is better than that in FIG Fig. 1 shown calender.
  • the soft roller 2 arranged at the same height as the hard roller 3 is thermally stressed to a comparable degree as the soft rollers of FIG Fig. 2 calender shown.
  • the soft roller 4 arranged under the hard roller 3 is thermally stressed to a very small extent. Since the two active planes are at a 90 ° angle to each other, the nips 5, 6 influence each other at the lowest possible, ie even less, than in the Fig. 5 shown calender. If calendered in the joints or the nips 5, 6 with different line forces, then the deflection of the heated roll 3, caused by the nip 5 runs exactly perpendicular to the pressure line of the nip 6 (the same applies vice versa). The resulting bending line error is small and can be neglected (only the line power is reduced in each case).
  • Fig. 4 shows a calender 100, in which the active planes 7, 8 of the two soft rolls 2, 4 with the hard roll 3 are also at an angle ⁇ of 90 ° to each other.
  • the axes of rotation 10, 11 of the two soft rolls 2, 4 are arranged at the same height.
  • the hard roller 3 is arranged evenly over both soft rolls 2, 4. Both working planes are turned by the same angle from the horizontal. Both soft rollers 2, 4 are therefore thermally loaded to the same extent by the convection.
  • the in Fig. 4 influence the two nips 5, 6 with each other at the lowest possible.
  • the in Fig. 4 The calender shown has the best properties of all shown calenders.
  • the web 1 is passed through a formed by a hard 3 and a soft roll nip, then deflected around a guide roller, then passed through a second nip formed by a second soft roll and the same hard roll 3, wherein the working planes 7, 8 of the soft rolls 2, 4 with the hard roll 3 are at an angle ⁇ to each other, which is smaller than 180 °.
  • the calanders of 3 and 4 the angle ⁇ is about 90 °.
  • Fig. 5 is particularly important, should a thick spot 13, such as a seam pass through the calender 100, that the broke (on non-smoothed fabric in the direction of travel) is minimal. This is achieved by a "fast" determination of the setting parameters, their assembly and disassembly (ie realization and reversal) and the independence of the two nips 5, 6 from each other. The lower the adjustment parameters and the adaptation to a new line force, the faster the seam penetration can take place, with minimal waste. If a thick spot 13, for example, a seam is reported, then determines a not shown in the figures, control device, taking into account the web speed, when it will pass through the nip 5 and the nip 6.
  • the line force in this nip is reduced so that this nip 5, without damaging the plastic coating of the soft roll, can be passed.
  • the line force of this nip is raised back to its original value.
  • the line force is lowered in this nip 6 here, too, to allow the shock reduced thick pass.
  • the contact pressure is increased again to the previous value. It is desirable if the nips 5, 6 are controlled so that they influence each other as little as possible.
  • the displacement of the pressure point on the roller bearing of the heated roller 3 by the changing load should not affect this as a discontinuity in the process here.
  • the 90 ° arrangement, as in the FIGS. 3 and 4 shown is ideally suited for this purpose, in particular if, as preferred, the soft rolls 2, 4 are floating rolls. Because their deflection is limited by the design required hardness or rigidity of the system immanent steel tube (hollow cylinder). In order to reduce the line force in the nip for the thick place, so in the case of a floating roller so the change of several pressure parameters is necessary. This takes time. Therefore, it is particularly advantageous if this change in the line force in a nip affects as little as possible on the other nip.

Landscapes

  • Treatment Of Fiber Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (8)

  1. Calandre (100) destinée à traiter une bande de matière (1), comprenant une pluralité de cylindres (2, 3, 4), au moins un cylindre dur (3) étant prévu qui forme avec deux cylindres mous (2, 4) deux emprises (5, 6), le cylindre dur (3) étant de préférence chauffé, les niveaux d'action (7, 8) des cylindres mous (2, 4) formant avec le rouleau dur (3) un angle (γ) de moins à 180°, caractérisé en ce qu'un capteur de zones épaisses (12) détecte les zones épaisses (13) de la bande de matière (1), en ce qu'il est prévu des moyens de détection de la vitesse de la bande de matière, et un dispositif de commande qui calcule à partir des valeurs du capteur de zones épaisses (12) et de la vitesse de la bande d'étanchéité l'instant auquel la zone épaisse (13) passe par les emprises (5, 6) et réduit, avant cet instant, la force linaire de l'emprise (5, 6) respective, de telle sorte que les emprises (5, 6) peut être passées sans causer de dommages, les forces linéaires exercées par les deux emprises étant réduites avec un décalage dans le temps.
  2. Calandre selon la revendication 1, caractérisée en ce que l'axe de rotation (9) du rouleau dur (3) se trouve plus en hauteur que l'axe de rotation (10, 11) d'au moins l'un des rouleaux souples (2, 4).
  3. Calandre selon la revendication 1 ou 2, caractérisée en ce que l'axe de rotation (9) du rouleau dur (3) se trouve plus en hauteur que les axes de rotation (10, 11) des deux rouleaux souples (2, 4).
  4. Calandre selon l'une des revendications 1 à 3, caractérisée en ce que les axes de rotation (10, 11) des rouleaux souples (2, 4) se trouvent à une même hauteur.
  5. Calandre selon l'une des revendications 1 à 4, caractérisée en ce que l'angle (γ) est compris entre 110° et 70° et est de préférence d'environ 90°.
  6. Calandre selon l'une des revendications 1 à 5, caractérisée en ce qu'au moins un des cylindres mous (2, 4) est commandable en flexion et est de préférence un cylindre flottant.
  7. Calandre selon l'une des revendications 1 à 5, caractérisée en ce qu'au moins un des cylindres mous (2, 4) est un cylindre commandable en flexion, supporté par piston, qui comprend éventuellement un moyeu interne dans lequel le tube de cylindre est en même temps le revêtement.
  8. Procédé pour calandrer une bande de matière, comprenant les étapes suivantes consistant à :
    - guider la bande de matière (1) à travers une emprise formée par un cylindre dur (3) et un cylindre mou,
    - dévier la bande de matière (1) autour d'un cylindre de déviation,
    - guider la bande de matière (1) à travers une seconde emprise qui est formée par un second cylindre mou et le même cylindre dur (3), les niveaux d'action (7, 8) des cylindres mous (2, 4) formant avec le cylindre dur (3) un angle (γ) qui est inférieur à 180° et de préférence d'environ 90°,
    - détecter une zone épaisse (1) située dans la bande de matière (13),
    - déterminer l'instant auquel la zone épaisse passera par les emprises (5, 6),
    - avant cet instant, réduire la force linéaire dans les emprises (5 ou 6) de façon à ce que la zone épaisse (13) puisse passer par les emprises (5, 6) sans endommager le revêtement des cylindres souples (2, 4), les forces linéaires des deux emprises (5, 6) sont réduites non pas simultanément avec un décalage dans le temps,
    - augmenter les forces linéaires à la valeur de départ.
EP15160553.2A 2011-07-28 2012-07-12 Calandre Active EP2913435B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011052229A DE102011052229A1 (de) 2011-07-28 2011-07-28 Kalander
EP12734950.4A EP2737126B1 (fr) 2011-07-28 2012-07-12 Calandre

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP12734950.4A Division-Into EP2737126B1 (fr) 2011-07-28 2012-07-12 Calandre
EP12734950.4A Division EP2737126B1 (fr) 2011-07-28 2012-07-12 Calandre

Publications (2)

Publication Number Publication Date
EP2913435A1 EP2913435A1 (fr) 2015-09-02
EP2913435B1 true EP2913435B1 (fr) 2016-06-22

Family

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Application Number Title Priority Date Filing Date
EP15160553.2A Active EP2913435B1 (fr) 2011-07-28 2012-07-12 Calandre
EP12734950.4A Active EP2737126B1 (fr) 2011-07-28 2012-07-12 Calandre

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Application Number Title Priority Date Filing Date
EP12734950.4A Active EP2737126B1 (fr) 2011-07-28 2012-07-12 Calandre

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EP (2) EP2913435B1 (fr)
CN (1) CN103842587B (fr)
DE (1) DE102011052229A1 (fr)
WO (1) WO2013013994A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022114430A1 (de) 2022-06-08 2023-12-14 Koenig & Bauer Ag Vorrichtung zum Beschichten eines Trägersubstrates mit einem Trockenfilm
WO2023237238A1 (fr) 2022-06-08 2023-12-14 Koenig & Bauer Ag Appareil de revêtement d'un substrat de support avec un matériau pulvérulent et machine de production d'un brin de produit avec un film sec appliqué à un substrat de support

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610137A (en) * 1968-11-22 1971-10-05 Beloit Corp Calender for paper and the like
FR2061929A5 (en) * 1969-10-01 1971-06-25 Gall Jean Paul Automatic guarding of sheet processing equip -
FI58801C (fi) * 1976-06-17 1981-04-10 Valmet Oy Till en pappersmaskin hoerande sk superkalander
US4194446A (en) * 1976-08-20 1980-03-25 Valmet 04 Rolls, such as filled calender rolls, having deflection compensation
DE3832405C1 (fr) 1988-09-23 1989-09-07 Eduard Kuesters, Maschinenfabrik, Gmbh & Co Kg, 4150 Krefeld, De
FI86092C (fi) * 1989-11-27 1992-07-10 Valmet Paper Machinery Inc Kalander avsedd foer on-line anslutning till en pappersmaskin.
DE19650576C2 (de) 1996-12-06 2001-02-15 Kuesters Eduard Maschf Kalander
DE10343980B4 (de) * 2003-09-19 2005-08-18 Eduard Küsters Maschinenfabrik GmbH & Co. KG Kalander
DE102009046053A1 (de) * 2009-10-27 2011-05-05 Voith Patent Gmbh Verfahren und Vorrichtung zum Öffnen eines Nips

Also Published As

Publication number Publication date
WO2013013994A1 (fr) 2013-01-31
EP2737126B1 (fr) 2018-01-31
CN103842587B (zh) 2017-02-15
EP2737126A1 (fr) 2014-06-04
CN103842587A (zh) 2014-06-04
DE102011052229A1 (de) 2013-01-31
EP2913435A1 (fr) 2015-09-02

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