EP0933472A2 - Procédé de fonctionnement d'une calandre et calandre - Google Patents

Procédé de fonctionnement d'une calandre et calandre Download PDF

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Publication number
EP0933472A2
EP0933472A2 EP99101366A EP99101366A EP0933472A2 EP 0933472 A2 EP0933472 A2 EP 0933472A2 EP 99101366 A EP99101366 A EP 99101366A EP 99101366 A EP99101366 A EP 99101366A EP 0933472 A2 EP0933472 A2 EP 0933472A2
Authority
EP
European Patent Office
Prior art keywords
calender
roller
drive
rollers
roll
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
EP99101366A
Other languages
German (de)
English (en)
Other versions
EP0933472B1 (fr
EP0933472A3 (fr
Inventor
Franz Kayser
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 EP0933472A2 publication Critical patent/EP0933472A2/fr
Publication of EP0933472A3 publication Critical patent/EP0933472A3/fr
Application granted granted Critical
Publication of EP0933472B1 publication Critical patent/EP0933472B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21G1/0006—Driving arrangements
    • 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
    • D21G1/0033—Arrangements for maintaining uniform nip conditions by offsetting the roll axes horizontally

Definitions

  • the invention relates to a method of operation a calender according to the preamble of the claim 1 and on a calender according to the preamble of claim 8.
  • a known calender of this type (DE 295 18 424) are five or more rolls, preferably 8 rolls, one above the other arranged.
  • the rollers form a number of Working columns, each by a hard roller and one elastic roller are limited, and an alternating gap, which is limited by two elastic rollers.
  • a separate drive is provided for the roller.
  • the additional auxiliary drives provided for the main drive the circumferential speed of the respective roller to bring up to web speed so that the roll package closed at paper insertion speed can be.
  • the invention has for its object a new way of influencing of the calender.
  • the compressive stress cross profile can be influenced.
  • the deflection one roller adapted to the deflection of the neighboring roller be so that there is a high level of uniformity results. This is especially true in the first and last Working gap, because on the end rollers an undershot Reactive force attacks that result in only one deflection dependent on the rigidity of the roller leads.
  • the compressive stress influencing according to claim 2 is based on the new finding that with a spread relief of the bending lines of adjacent rolls not in the middle of the track, but in the edge areas the web is done.
  • the features of claim 3 indicate how the drives can be controlled to discharge in a simple manner or load the edge area.
  • Claim 5 offers the advantageous possibility that the Shear forces in the web are almost zero, which is assumes that the rollers are bent is. A paper produced in this way has one higher tear resistance.
  • the embodiment according to claim 7 leads to a very uniform compressive stress cross profile.
  • a preferred degree of slenderness is according to claim 9 between 12 and 16 and according to claim 10 at about 14.
  • the two end rollers are said to have a lower degree of slenderness. Your inevitable Deflection is therefore kept smaller, so that also the adaptation of the next roller to the deflection the end roller requires little deflection.
  • the calender according to claim 12 off-line be arranged.
  • Such a calender that is independent works from the paper machine, runs with considerable lower speed than an in-line calender, connected to a paper machine. You had one for such an off-line calender single drive on one roller, all other rollers dragged along by friction, considered sufficient and therefore could experience the effects of single propulsion not use.
  • the diameter should be at least one Middle roller maximum 100 cm. This upper one Limit applies to a calender with a width of 10 m and more.
  • a calender 1 is an off-line calender between one Unwind station 2 and a winding station 3 arranged. But it could also be used as an in-line calender Connect the output of a paper machine.
  • the calender has a vertical stack 4 of eight rollers 5 to 12, namely an upper roller 5 and a lower roller 12, both as zone-controlled bending adjustment rollers can be formed, and six center rollers 6 to 11.
  • Four rollers 5, 7, 10 and 12 have a hard metallic one Surface and four rollers 6, 8, 9 and 11 one elastic plastic covering.
  • the rollers 7 and 10 are heated by superheated steam.
  • the bearing block 13 of the top roller 5 is fixed to the stand 14 of the calender 1 attached.
  • the bearing blocks 15 of the Middle rollers 6 to 11 are carried by levers 16, the pivot axes 17 fastened to the stand 14 are.
  • the bearing block 18 for the lower roller 12 is held on a vertical guide 19 and can by means of a hydraulic cylinder 20 are pushed upwards, so that one in the working columns 21 of the stack sufficient line load results.
  • When lowering the hydraulic cylinder 20 the middle rollers also follow this 6 to 11 until the associated lever 16 at a stop 22 come to the plant and all nips be open.
  • the levers 16 are powered by 23 with which the loads hanging on the levers and weights are fully or partially compensated can.
  • a paper web 24 is guided with the aid of guide rollers 25 passed through the nips.
  • On the output side is one Measuring device 26 provided that a parameter of Paper web 24 measures over the entire width, be it by a reciprocating measuring element or by several measuring elements distributed over the width. Shine, smoothness, thickness, for example, come as parameters or the like into consideration.
  • Each of the eight rollers 5 to 12 has its own drive 27, its driving torque by a control device 28 is predetermined, as shown schematically by the outputs A5 to A12 is specified.
  • the control device 28 has further outputs, in particular one Output B20, which is the pressure for the hydraulic cylinder 20 determines outputs B5 / 20, which the pressure in the bend adjustment devices of the end rollers 5 and 12 determine outputs B23, which the pressure in the force transducers 23 determine, and outputs B6 / 10, which the supply of the heat transfer medium in the heated rollers 7 and Determine 10.
  • Numerous inputs E1 are used to enter data, which are essential for paper finishing, in particular the target values of the desired paper parameters.
  • Other inputs, such as input E 26, are used for input of measured actual values, for example the smoothness, Gloss or thickness.
  • F N denotes the force that is required to overcome the calendering resistance. It serves to overcome the compression of the elastic roller cover as well as the elastic and plastic parts of the paper forming. F N changes with the physical properties (e.g. density and smoothness) from gap to gap, ie not only with the roll load characteristic).
  • M R denotes the frictional moments of the roller bearings and, if applicable, of scrapers and sealing heads (rotary inlets for heating or cooling media). The latter can significantly exceed the bearing friction. In the case of bending adjustment rollers, the friction from the oil flow between the fixed axis and the rotating jacket, as well as the hydrostatic oil gaps or the sealing strips on S rollers, dominate.
  • F U is the force to be applied by the rollers to the paper web 24, which is necessary to overcome the calendering resistance and, if applicable, any web tension ⁇ B Z that may be present.
  • the specified reaction force F R1 which cannot be made zero, can be calculated from the circumferential forces F U1 , the friction moments M R1 and the diameter D 1 of the roller 5.
  • the differences in the circumferential forces result in reaction forces for the center rolls, which can be changed within a certain range by changing the drive torque of the individual drives. It is important that the reaction forces F R are responsible for the deflection, that is, the lateral deflection of the rolls.
  • a control device 28 is provided, with which these drive torques for each individual drive are adjustable to the compressive stress cross profile in this way to influence.
  • a high level of Uniformity of the compressive stress results when the Bending of the top middle roller 6 from the middle plane of the stack of the inevitable deflection of the Top roller 5 is adjusted. Even if the deflection of the Top roller 5 should only be small, brings an adjustment the bending line of the roller 6 an improvement in Compression stress cross profile with itself.
  • Another cheap mode of operation with the particular tensile paper can be achieved, provides that no shear forces are exerted on the web. Also this sets a certain deflection of the middle rolls ahead.
  • the center rolls had 6 to 11 a slenderness ratio (length / diameter) of about 14.
  • the examples shown can be in multiple Be deviated without regard to the basic idea of Leaving invention.
  • the calender 1 can also be used in in-line operation.
  • the number the rollers can vary, with the preferred values are between four and eight.

Landscapes

  • Paper (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
EP99101366A 1998-01-29 1999-01-26 Procédé de fonctionnement d'une calandre et calandre Expired - Lifetime EP0933472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803323 1998-01-29
DE19803323A DE19803323C2 (de) 1998-01-29 1998-01-29 Verfahren zur Beeinflussung eines Bahnmaterials, wie Papier, und Kalander zur Durchführung des Verfahrens

Publications (3)

Publication Number Publication Date
EP0933472A2 true EP0933472A2 (fr) 1999-08-04
EP0933472A3 EP0933472A3 (fr) 2000-05-10
EP0933472B1 EP0933472B1 (fr) 2004-03-31

Family

ID=7855953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101366A Expired - Lifetime EP0933472B1 (fr) 1998-01-29 1999-01-26 Procédé de fonctionnement d'une calandre et calandre

Country Status (5)

Country Link
US (1) US6234075B1 (fr)
EP (1) EP0933472B1 (fr)
AT (1) ATE263277T1 (fr)
CA (1) CA2260508A1 (fr)
DE (2) DE19803323C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990070B1 (fr) * 1998-03-17 2003-05-07 Eduard Küsters Maschinenfabrik GmbH & Co. KG Ensemble calandre

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030126998A1 (en) * 1998-03-17 2003-07-10 Eduard Kusters Maschinenfabrik Gmbh & Co. Kg Calender arrangement
US7096779B2 (en) 1998-03-17 2006-08-29 Eduard Küsters Maschinenfabrik GmbH & Co. KG Calender arrangement
DE10158910B4 (de) * 2001-11-30 2005-12-22 Voith Paper Patent Gmbh Verfahren und Kalander zum Satinieren einer Papier- oder Kartonbahn
US7079263B2 (en) * 2002-06-14 2006-07-18 Kimberly-Clark Worldwide, Inc. Method and apparatus for on-line log diameter measurement and closed-loop control

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE252151C (fr) *
US3044392A (en) * 1959-07-10 1962-07-17 Kimberly Clark Co Papermaking machine
US3331313A (en) * 1965-09-24 1967-07-18 Black Clawson Co Calender stacks having transverse pressure sensing and adjustment means
DE3735438C1 (de) * 1987-10-20 1989-05-18 Kleinewefers Gmbh Verfahren zum Betrieb eines Kalanders und Kalander zur Durchfuehrung dieses Verfahrens
DE19508352B4 (de) * 1995-03-09 2005-07-21 Voith Paper Patent Gmbh Kalander für die Behandlung einer Papierbahn
DE29521610U1 (de) * 1995-03-09 1997-11-20 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander für die Behandlung einer Papierbahn
DE29518424U1 (de) * 1995-11-21 1996-03-14 Voith Sulzer Finishing GmbH, 47803 Krefeld Kalander in einer Papier- oder Streichmaschine
DE19633671C2 (de) * 1996-08-21 1999-03-11 Voith Sulzer Finishing Gmbh Kalander
DE19650576C2 (de) * 1996-12-06 2001-02-15 Kuesters Eduard Maschf Kalander

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990070B1 (fr) * 1998-03-17 2003-05-07 Eduard Küsters Maschinenfabrik GmbH & Co. KG Ensemble calandre

Also Published As

Publication number Publication date
EP0933472B1 (fr) 2004-03-31
ATE263277T1 (de) 2004-04-15
EP0933472A3 (fr) 2000-05-10
US6234075B1 (en) 2001-05-22
DE19803323A1 (de) 1999-08-05
CA2260508A1 (fr) 1999-07-29
DE19803323C2 (de) 2003-06-05
DE59908983D1 (de) 2004-05-06

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