EP1209286A2 - Calendre et procédé de traitement d' une bande - Google Patents

Calendre et procédé de traitement d' une bande Download PDF

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Publication number
EP1209286A2
EP1209286A2 EP01127208A EP01127208A EP1209286A2 EP 1209286 A2 EP1209286 A2 EP 1209286A2 EP 01127208 A EP01127208 A EP 01127208A EP 01127208 A EP01127208 A EP 01127208A EP 1209286 A2 EP1209286 A2 EP 1209286A2
Authority
EP
European Patent Office
Prior art keywords
roller
deflection
rollers
adjacent
rolls
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
EP01127208A
Other languages
German (de)
English (en)
Other versions
EP1209286A3 (fr
EP1209286B1 (fr
Inventor
Junk Dieter
Linder Heiko
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7664275&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1209286(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1209286A2 publication Critical patent/EP1209286A2/fr
Publication of EP1209286A3 publication Critical patent/EP1209286A3/fr
Application granted granted Critical
Publication of EP1209286B1 publication Critical patent/EP1209286B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure
    • D21G1/0026—Arrangements for maintaining uniform nip conditions
    • 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 with a roll stack, of the two end rolls and in between several intermediate rolls has, in operation two each other neighboring rolls, each with a deflection, to form a nip.
  • the invention further relates to a method for treating a material web, the passed through several nips and pressurized there with each nip through a first roller and one of these adjacent second rollers is formed becomes.
  • Such a calender is used, for example, to satinize a paper web.
  • the paper webs to be satinized currently have widths of up to 10 m.
  • the correspondingly long rollers therefore tend because of their own weight in the axial center "sag", so they have a deflection. Even if this deflection is not too big, makes them annoying in the pressure treatment of the paper web or another material web noticeable.
  • the invention has for its object the burden to be made uniform in the nip.
  • This task is performed on a calender of the type mentioned at the beginning Art solved in that the deflections distinguish adjacent rolls from each other, whereby one adjacent to the convex side of a first roller second roll a weaker deflection than the first Has roller.
  • adjacent rollers each have a deflection in which one Amplitude of the deflection of the surface line on the convex Side of the first roller essentially with one Amplitude of the deflection of the surface line of the neighboring matches the second roller on the concave side.
  • rollers Preferably points from adjacent rollers at least one force application device. You no longer have to choose rollers, the inherently required deflections exhibit. One can do such a deflection also by introducing external forces.
  • Adjacent rollers preferably have different ones Stock clearances if they are in at least one parameter differ from each other. Achieved with this configuration not just a match of the deflections, more precisely the amplitudes of the deflections on the two neighboring generatrices of the two the nip forming rollers, but you have the option also set the same bending lines.
  • the bending lines are known not only to depend on the Amplitude of deflection, but also for example from the curve shape of the bending line, which over the shear deformation for example, the degree of slenderness of the rollers depends. If you now have the option of bearing distances to vary the intermediate rolls, then you get the possibility of actually the curve shape of the Bending lines of the surface lines, i.e. of the two the nip better aligning the bounding lines.
  • the difference in the bearing distances is preferably in Range from 0.1% to 2% based on the larger bearing distance. Such a deviation is perfectly tolerable.
  • the bearing distance at least one intermediate roller is changeable. To the exchange of the roller in question can then, if necessary the bending line into the desired shape bring.
  • the task is in a method of the aforementioned Kind of solved in that the deflections of the two rollers chooses differently.
  • the deflection of the first The roller controls the amplitude of the deflection the generatrix on the convex side of the first The roller corresponds to the amplitude of the deflection the surface line on the concave side of the second roller. If you match the deflections brings, you get an improved across the width of the rollers Work product.
  • Fig. 1 shows a section of a roll stack of a calender.
  • a material web is for example, one not shown Paper web, guided and there with pressure and if necessary also acted on at elevated temperature.
  • a prerequisite for this is that the two Rollers i, i + 1 can also form the Nip N evenly.
  • the two rollers i, i + 1 have different deflections on.
  • the deflections after a certain approach chosen below to be explained.
  • the goal is the deflection to match the lower surface line of the upper roller i the deflection of the upper surface line of the lower Roller i + 1.
  • the deflection only by the Gravity and the associated weight forces caused by the rollers. The considerations apply but basically also when the deflection is caused by external forces or moments.
  • the starting point for the following consideration is the opened roll stack, i.e. the middle rolls i, i + 1 hanging, supported in their bearings, freely accordingly their own bending lines made of gravity and rigidity by. This results at least in the first approximation the shape of a parabola. For the following consideration but it is enough if you have the deflection line as a circular line.
  • the two Lines of contact are the lower surface line of the upper Roller and the upper surface line of the lower roller.
  • f EM ( i +1) 2 D ( i +1) • K 2 + 4 D ( i +1) • K 2 • f EU i - 2 D ( i +1) • K 2 where f EU i has been defined above.
  • the roll stack has twelve rolls, i.e. two deflection adjustable Final rolls and intermediate rolls in between at the roller positions 2-11, which in a known manner alternately designed as hard and soft rollers are.
  • the hard rolls are chilled cast rolls with diameters of 760/410 mm (outer diameter, Internal diameter).
  • the soft rollers are as GG tube rolls with plastic cover and show a diameter of 825/800/428 mm (outer diameter with cover, outer diameter without cover, inner diameter) on.
  • the leveling of the can be further improved Load in the nip due to the fact that one of the center rollers selects or sets different bearing distances.
  • the setting can, for example, after a change a roller may be required.
  • the shear deformation of a roller is, among other things, a function f of the degree of slenderness Da / AB .
  • the shear deformation also depends on the shear distribution number ⁇ of the roll cross section, the transverse expansion factor ⁇ of the roll material and the diameter ratio Di / Da for hollow bore Di as follows

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
EP01127208A 2000-11-23 2001-11-16 Calendre et procédé de traitement d' une bande Revoked EP1209286B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10057991 2000-11-23
DE10057991A DE10057991C5 (de) 2000-11-23 2000-11-23 Kalander und Verfahren zum Behandeln einer Materialbahn

Publications (3)

Publication Number Publication Date
EP1209286A2 true EP1209286A2 (fr) 2002-05-29
EP1209286A3 EP1209286A3 (fr) 2003-02-12
EP1209286B1 EP1209286B1 (fr) 2006-04-05

Family

ID=7664275

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01127208A Revoked EP1209286B1 (fr) 2000-11-23 2001-11-16 Calendre et procédé de traitement d' une bande

Country Status (5)

Country Link
US (1) US6698340B2 (fr)
EP (1) EP1209286B1 (fr)
AT (1) ATE322573T1 (fr)
CA (1) CA2363633A1 (fr)
DE (2) DE10057991C5 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1326392A (fr) * 1962-01-26 1963-05-10 Neyrpic Ateliers Neyret Beylie Calandres
FI74070C (fi) * 1986-04-09 1987-12-10 Valmet Oy Foerfarande foer att kontrollera boejningen av en boejningsreglerad vals samt en vals foer en pappersmaskin foer tillaempning av foerfarandet.
DE3735438C1 (de) * 1987-10-20 1989-05-18 Kleinewefers Gmbh Verfahren zum Betrieb eines Kalanders und Kalander zur Durchfuehrung dieses Verfahrens
DE3838852C1 (fr) * 1988-11-17 1990-05-23 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4026773A1 (de) * 1990-08-24 1992-03-05 Voith Gmbh J M Linienkraftregelbares mehrwalzen-glaettwerk
FI96334C (fi) * 1993-11-24 1996-06-10 Valmet Paper Machinery Inc Menetelmä paperin tai vastaavan rainamateriaalin kalanteroinnissa ja menetelmää soveltava kalanteri
DE19511145C2 (de) * 1995-03-27 2000-07-13 Voith Sulzer Finishing Gmbh Kalander für die zweiseitige Papierbehandlung
ATE315126T1 (de) * 1997-05-07 2006-02-15 Metso Paper Inc Verfahren und vorrichtung zur berechnung und steuerung der linearen lastverteilung in einem mehrspalt-kalander und mehrspalt-kalander
DE19820089C2 (de) * 1998-05-06 2000-06-15 Kuesters Eduard Maschf Verfahren zum Kalandrieren einer Warenbahn mit einem vertikalen Mehrwalzen-Kalander

Also Published As

Publication number Publication date
ATE322573T1 (de) 2006-04-15
EP1209286A3 (fr) 2003-02-12
DE10057991C5 (de) 2007-04-19
DE10057991C1 (de) 2002-06-27
US20020134253A1 (en) 2002-09-26
US6698340B2 (en) 2004-03-02
CA2363633A1 (fr) 2002-05-23
EP1209286B1 (fr) 2006-04-05
DE50109422D1 (de) 2006-05-18

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