EP1431453A1 - Calandre à pinçage allongé - Google Patents

Calandre à pinçage allongé Download PDF

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Publication number
EP1431453A1
EP1431453A1 EP03027126A EP03027126A EP1431453A1 EP 1431453 A1 EP1431453 A1 EP 1431453A1 EP 03027126 A EP03027126 A EP 03027126A EP 03027126 A EP03027126 A EP 03027126A EP 1431453 A1 EP1431453 A1 EP 1431453A1
Authority
EP
European Patent Office
Prior art keywords
jacket
radially
cylindrical shape
deformed
deformation
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
EP03027126A
Other languages
German (de)
English (en)
Other versions
EP1431453B1 (fr
Inventor
Josef Schneid
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 EP1431453A1 publication Critical patent/EP1431453A1/fr
Application granted granted Critical
Publication of EP1431453B1 publication Critical patent/EP1431453B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips

Definitions

  • the invention relates to a wide nip calender with a in the unloaded state at least in sections a circumferential jacket having a cylindrical shape, one Counter roller and a pressure shoe, which the coat on the counter roller presses and thereby from the cylindrical shape deformed out.
  • Such a wide nip calender is, for example, from DE 299 02 451 U1 known.
  • Breitnip calenders are used to make a fibrous web, for example a paper or cardboard web, to satinize, so with increased pressure and usually also to be subjected to an elevated temperature.
  • the Breitnip calender has one longer treatment length. This treatment length will formed in that the coat over part of the Circumferential surface of the counter roller bears against the counter roller. This concern is brought about by the pressure shoe presses the jacket against the counter roller.
  • the coat has in "Hibernation", ie when he is unloaded, over most of its axial length is cylindrical Shape. Seen from the outside, it is therefore over the whole The circumference is convexly curved.
  • the jacket In the area where the coat pressed against the counter roller by the pressure shoe the jacket is deformed concavely. In addition, that the jacket through the pressure shoe often also radially is deformed outwards. With that one creates at the axial ends of the jacket tapered sections, in which one avoids that the coat with the hot Counter roll comes into contact. Such a touch would the coat, which usually consists of one Plastic material is formed, thermally overstress and damage it.
  • the invention has for its object a wide nip calender specify the case where possible is little burdened.
  • This task is the beginning of a wide nip calender mentioned type in that the coat in state pressed against the counter roller by the cylindrical shape starting partly radially outwards and partly is deformed radially inwards.
  • a maximum deformation corresponds radially maximum deformation radially inwards.
  • the maximum deformation is the largest distance that the Has jacket of the cylindrical shape. This greatest distance radially outwards is the same size as radially inwards. So you get a deformation equilibrium, where the load on the circumferential jacket is relative is low.
  • outer differential volume between the cylinder shape and the deformed jacket radially outside the cylindrical shape is formed, an internal difference volume, that between the cylindrical shape and the deformed jacket is formed radially within the cylindrical shape.
  • the outer and the inner differential volume are of course only theoretical sizes because the jacket does not work a cylindrical shape and a deformed shape at the same time can have.
  • the cylinder shape can be calculated easily reproduce.
  • the roll shell is preferably on its end faces each finished with a side window, the Radius smaller than a radius of the deformed roll shell in the area of maximum deformation radially outwards is. This will be in the areas where the roll shell is deformed radially outwards, that is in the direction of rotation the roll shell at the beginning and end of the pressure shoe, made sure that the roller jacket from the counter roller is pulled away.
  • the Radius smaller than a radius of the deformed roll shell in the area of maximum deformation radially outwards is. This will be in the areas where the roll shell is deformed radially outwards, that is in the direction of rotation the roll shell at the beginning and end of the pressure shoe, made sure that the roller jacket from the counter roller is pulled away.
  • a certain one Deformation of the roll shell also in the axial direction to observe. However, this deformation is due to the Dimensioning of the side windows limited.
  • the side window preferably has a radius, which is at least as large as a radius of the deformed one Radial roll shell in the area of maximum deformation inside. In this area the roller jacket no longer pulled away from the roller. Therefore you keep the deformation of the roll shell small. Since the Contact time of the roll shell with the counter roll only is short, touch may even be allowed.
  • Fig. 1 shows schematically a wide nip calender 1 in Neckline with a circumferential coat 2, the under the effect of a pressure shoe 3 against a counter roller 4 is pressed.
  • the pressure shoe 3 has one Press surface 5, which is adapted to the curvature of the counter roller 4 is.
  • Another form is, however, in principle also possible.
  • Means are usually provided in the pressing surface 5, for lubrication between the pressure shoe 3 and to cause the sheath 2 when the sheath 2 is under pressure passed between the pressure shoe 3 and the counter roller 4 becomes.
  • Such means can, for example Discharge openings of a hydrostatic lubrication his.
  • the jacket 2 has a cylindrical shape in the unloaded state on, in the present case by a circular line 6 is shown. It is not necessary that the jacket 2 this cylindrical shape over the entire axial Takes up length. For example, at the axial ends conical sections may be provided.
  • the pressure shoe 3 points in the circumferential direction both ends rounded projections 9, 10 while it has a depression 11 in the region of its center.
  • the projections 9, 10 and the recess go 11 into one another, for example along a cylindrical surface.
  • the jacket 2 is deformed outwards with respect to the circular line 6. This results in a maximum deformation 12 in the area of the “tip” of the projection 9 (a corresponding deformation also results at the tip of the projection 10). A deformation radially inwards results in the area of the depression 11, specifically in the middle. Here, too, there is a maximum deformation 13.
  • Fig. 1 represents the deformation of the jacket in the circumferential direction represents this deformation practically only in the area where the pressure shoe 3 is arranged, that is in a partial area of the axial length of the jacket 2.
  • a further deformation occurs at the axial ends of the jacket 2, as shown in Fig. 2.
  • the jacket 2 is in the area with solid lines its maximum deformation is shown radially outwards and with dashed lines in the area of its maximum deformation radially inwards.
  • the jacket 2 is at its axial ends with side windows 14 completed.
  • These side windows 14 have a radius that corresponds to the radius of the jacket 2 in the undeformed Condition corresponds.
  • each side window 14 has a radius that is smaller as a radius of the deformed roll shell 2 in the area the maximum deformation 12 radially outwards, however at least as large as a radius of the deformed roll shell 2 radially in the region of the maximum deformation 13 inside. In this way you achieve that the deformation also in certain in the axial edge area Limits can be kept.

Landscapes

  • Paper (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
EP03027126A 2002-12-19 2003-11-26 Calandre à pinçage allongé Expired - Fee Related EP1431453B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10259442 2002-12-19
DE10259442A DE10259442C5 (de) 2002-12-19 2002-12-19 Breitnip-Kalander

Publications (2)

Publication Number Publication Date
EP1431453A1 true EP1431453A1 (fr) 2004-06-23
EP1431453B1 EP1431453B1 (fr) 2007-10-03

Family

ID=32336464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03027126A Expired - Fee Related EP1431453B1 (fr) 2002-12-19 2003-11-26 Calandre à pinçage allongé

Country Status (3)

Country Link
EP (1) EP1431453B1 (fr)
AT (1) ATE374863T1 (fr)
DE (2) DE10259442C5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1609907A1 (fr) * 2004-06-22 2005-12-28 Voith Paper Patent GmbH Calandre à pincage prolongée et procédé de satinage d' une bande de matériau
EP1643033A2 (fr) * 2004-10-02 2006-04-05 Voith Paper Patent GmbH Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642943A1 (de) * 1996-10-17 1998-04-23 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
US6164198A (en) * 1998-12-16 2000-12-26 Valmet Corporation Apparatus for calendering paper
WO2003035978A1 (fr) * 2001-10-25 2003-05-01 Metso Paper, Inc. Procede de traitement d'une bande de papier ou de carton et dispositif de traitement d'une bande de papier ou de carton

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239954C2 (de) * 1982-10-28 1984-10-18 J.M. Voith Gmbh, 7920 Heidenheim Walzenpresse für Bahnen aus Papier, Textilien od.dgl.
DE3317457A1 (de) * 1983-05-13 1984-11-15 J.M. Voith Gmbh, 7920 Heidenheim Presseinrichtung fuer bandfoermiges gut, insbesondere zum entwaessern einer papierbahn
DE3338487A1 (de) * 1983-10-22 1985-05-02 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Presswalze
DE3503373A1 (de) * 1985-02-01 1986-08-07 J.M. Voith Gmbh, 7920 Heidenheim Walzenpresse mit einer langspalt-presswalze
DE19615654A1 (de) * 1996-04-19 1997-10-23 Voith Sulzer Papiermasch Gmbh Pressenanordnung
US20030032059A1 (en) * 2000-05-23 2003-02-13 Zhen-Gang Wang Gene recombination and hybrid protein development
US6505549B2 (en) * 2000-11-20 2003-01-14 Metso Paper Karlstad Ab Method of and an apparatus for protecting the jacket upon a web break in a hot shoe press roll nip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19642943A1 (de) * 1996-10-17 1998-04-23 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
US6164198A (en) * 1998-12-16 2000-12-26 Valmet Corporation Apparatus for calendering paper
WO2003035978A1 (fr) * 2001-10-25 2003-05-01 Metso Paper, Inc. Procede de traitement d'une bande de papier ou de carton et dispositif de traitement d'une bande de papier ou de carton

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1609907A1 (fr) * 2004-06-22 2005-12-28 Voith Paper Patent GmbH Calandre à pincage prolongée et procédé de satinage d' une bande de matériau
EP1643033A2 (fr) * 2004-10-02 2006-04-05 Voith Paper Patent GmbH Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse
EP1643033A3 (fr) * 2004-10-02 2006-10-18 Voith Patent GmbH Dispositif de pressage d'une section de presse d'une machine de fabrication d'une bande fibreuse

Also Published As

Publication number Publication date
DE10259442B4 (de) 2006-05-24
EP1431453B1 (fr) 2007-10-03
DE10259442A1 (de) 2004-07-15
DE50308315D1 (de) 2007-11-15
ATE374863T1 (de) 2007-10-15
DE10259442C5 (de) 2008-01-03

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