EP0700470B1 - Dispositif de pression pour bande en deplacement - Google Patents

Dispositif de pression pour bande en deplacement Download PDF

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Publication number
EP0700470B1
EP0700470B1 EP93919793A EP93919793A EP0700470B1 EP 0700470 B1 EP0700470 B1 EP 0700470B1 EP 93919793 A EP93919793 A EP 93919793A EP 93919793 A EP93919793 A EP 93919793A EP 0700470 B1 EP0700470 B1 EP 0700470B1
Authority
EP
European Patent Office
Prior art keywords
belt
press
roll
web
pressing arrangement
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.)
Expired - Lifetime
Application number
EP93919793A
Other languages
German (de)
English (en)
Other versions
EP0700470A1 (fr
Inventor
Erik Nykopp
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.)
Individual
Original Assignee
Individual
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
Priority claimed from SE19939301802A external-priority patent/SE9301802D0/xx
Application filed by Individual filed Critical Individual
Publication of EP0700470A1 publication Critical patent/EP0700470A1/fr
Application granted granted Critical
Publication of EP0700470B1 publication Critical patent/EP0700470B1/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
    • D21G1/006—Calenders; Smoothing apparatus with extended nips
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • 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 present invention concerns a pressing arrangement for a moving web in accordance with the preamble of claim 1.
  • the unit is principally intended for surface finishing of fiber mats such as paper or board which under pressure pass between the press roll and the moving belt.
  • the press roll is heated to a temperature of at least 100° Celcius.
  • a calendering arrangement is known from DE 3632692 A wherein a web is transported thru a calender nip formed between two rolls where both rolls are controllably driven and a soft belt encloses one of the rolls.
  • An "ironing" action is achieved on the web by pressing the rolls very lightly against each other and driving them at different speeds so as to produce a satinating effect thru friction.
  • This arrangement the surface improvement of the web is obtained solely thru a speed difference and frictional polishing action between the web and the roll facing the web.
  • One main purpose wih the present invention is to achieve a pressing arrangement of the general type indicated in the introduction wherein the moving web is pressed against the press roll with a uniform pressure independent of variations in the thickness of the moving web. Another purpose is to achieve effective cooling of the belt. A further purpose is to provide the possibility of preheating the web in a controlled manner prior to the press zone.
  • the invented pressing arrangement has the characterizing features set fort in the main claim. In this manner one obtains a smooth and uniform web surface on the side facing the press roll, irrespective of variations in the thickness of the web.
  • the moving web is subjected to pressure in the press zone formed between a press roll and an elastic belt which is supported by a roll of suitable diameter or a stationary glide body or shoe.
  • average unit pressures in the press zone have to be relatively high, i.e. a minimum of approximately 2 MPa and the surface temperature of the press roll at least 100° Celsius, preferably between 150 and 250°C.
  • the web facing side of the belt would be surface finished to a roughness of typically 2 microns but importantly to a finish which yields a more uniform surface structure than that of the side of the web in contact with it in the press zone, e.g. at least the same, suitably 50%, preferably 25%, and especially 10% of the average pore size of the web.
  • the high unit pressures in the press zone cause the smooth elastic belt to follow the contour of the less uniform side of the web facing it, thus resulting in a very even pressure on the web. As a cosequence this will enhance the uniformity and evenness of the pressing action on the side of the web facing the press roll.
  • the pressing action would typically cause a minimum thickness reduction in the belt equal to about 3% in the middle of the press zone. This would normally represent an indentation which is considerably more than the deepest nonuniformity in typical paper or board.
  • the cooling action on the backside of the moving belt by means of coolant in the supporting counter body protects the belt from overheating in the middle where where the reinforcing structure normally is located.
  • the moving web is pressed against the heated press roll by the moving belt following said roll ahead of the press zone.
  • This pressure is a function of the tension in the belt and can thus be considerable depending on the physical properties of the belt and certainly much higher than if the moving web alone (without the belt) would be contacting the press roll.
  • It is also desirable to control the time of contact (preheating) prior to the press zone which can be done by adjusting the guide roll guiding the belt ahead of the press zone.
  • the supporting counter body constitutes a cylindrical roll and thus the inside of the belt, facing this roll, could have a relatively nonuniform surface as said surface contacts a moving surface (roll) instead of sliding over stationary parts in the press zone.
  • a desired length of the press zone can further be achieved by selecting a proper diameter for the roll. The bigger the diameter of both the press roll and the counter roll, the longer will be the press zone.
  • the length of the press zone is also a function of the elasticity and thickness of the moving belt which encloses the counter roll. In practice, the length of the press zone can be between approximately 1 and 10 centimeters.
  • the indentation in the belt could then be about 1 mm.
  • the surface roughness of the side of the belt facing the web is suitably 5 microns, preferably 2 microns, and most preferably 1 micron.
  • the counter roll could be cooled by water whereas oil, circulating in a closed loop including an oil cooler, could preferentially be utilized when the supporting counter body constitutes a glide shoe or glide body.
  • Fig. 1 shows a pressing arrangement for a moving web, formed between a cylindrical press roll 1 and a belt 5 supported by a counter body constituting a roll 2.
  • a moving web 6 is passed between the rotating press roll and the moving belt.
  • a guide roll 3 and a stretch roll 4 are provided for guiding the belt and maintaining it under proper tension.
  • the press and counter rolls are forced against eachother by arbitrary, known loading mechanisms not shown here, thus producing the press zone 7.
  • the press roll is heated to a temperature of at least 100°C.
  • the counter roll can be cooled by known means not shown here.
  • the counter body constitutes a glide body 9 which is supported by a beam 15.
  • a lubricating duct 10 and lubricating nozzles 12 are provided for lubricating the area between the glide body 9 and the moving belt 5.
  • a duct 13 is indicated for a cooling fluid which transfers heat within a closed loop including a heat exchanger.
  • Arbitrary, known loading mechanisms for applying load between the press roll and the glide body are not shown here.
  • the glide body can be adjusted from the end flanges 50 as indicated by the arrows 52.
  • the moving web 6 passes between the press roll 1 and the moving belt 5 in the press zone 7.
  • an adjustable 14 guide roll 16 is shown and has been included for the purpose of obtaining a preheating zone 8 of variable length prior to the press zone 7.
  • the moving belt 5 encloses guide roll 16. With the exception of this guide roll the arrangement is similar to that shown in fig. 1.

Landscapes

  • Paper (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Finger-Pressure Massage (AREA)

Claims (10)

  1. Arrangement de pression pour une bande (6) qui défile, englobant une zone de presse (7) pour la bande (6) qui défile, formée entre un rouleau presseur cylindrique (1) et une courroie élastique (5), ladite courroie étant une courroie sans fin et étant supportée par un corps antagoniste (2, 9), caractérisé en ce que la surface de la courroie (5) est plus uniforme que la structure superficielle de la bande (6) qui défile et en ce que la température superficielle du rouleau presseur (1) s'élève à au moins 100°C.
  2. Arrangement de pression selon la revendication 1, caractérisé en ce que la structure superficielle du côté de la courroie (5) opposé à la bande (6) possède une grosseur de pore qui est au moins égale à la grosseur de pore moyenne de la bande (6) qui défilé et qui représente de manière appropriée 50%, de préférence 25%, de manière de loin préférée 10% dé cette grosseur moyenne, et/ou en ce que la rugosité superficielle du côté de la courroie (5) opposé a la bande (6) s'élève à au moins 5 microns, de préférence à 2 microns, de manière de loin préférée à 1 micron.
  3. Arrangement de pression selon la revendication 1 ou 2, caractérisé en ce que ledit corps antagoniste est muni d'un moyen de refroidissement.
  4. Arrangement de pression selon la revendication 1, 2 ou 3, caractérisé en ce que ledit corps antagoniste est constitué d'un rouleau (2).
  5. Arrangement de pression selon la revendication 1, 2 ou 3, caractérisé en ce que ledit corps antagoniste est constitué d'un corps de glissement stationnaire (9).
  6. Arrangement de pression selon l'une quelconque des revendications ci-dessus, caractérisé en ce que la courroie (5) qui se déplace est guidée dans la zone de presse (7) via le rouleau presseur (1) en procurant ainsi une zone de préchauffage (8) avant la zone de presse (7).
  7. Arrangement de pression selon la revendication 6, caractérisé en ce que la courroie (5) qui se déplace est guidée dans la zone de presse (7) via la rouleau presseur (1) à l'aide d'un rouleau de guidage (16).
  8. Arrangement de pression selon la revendication 6, caractérisé en ce que la longueur de la zone de préchauffage (8) est réglable.
  9. Arrangement de pression selon les revendications 7 et 8, caractérisé en ce que la longueur de la zone de préchauffage (8) est réglée à l'aide du rouleau de guidage (16).
  10. Arrangement de pression selon l'une quelconque des revendications ci-dessus, caractérisé en ce que l'épaisseur de la courroie (5) qui se déplace, au centre de la zone de presse (7), représente moins de 97% de l'épaisseur de la courroie à l'état non chargé.
EP93919793A 1993-05-27 1993-09-08 Dispositif de pression pour bande en deplacement Expired - Lifetime EP0700470B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE19939301802A SE9301802D0 (sv) 1992-09-09 1993-05-27 Press arrangement for a moving web
SE9301802 1993-05-27
PCT/SE1993/000730 WO1994028239A1 (fr) 1993-05-27 1993-09-08 Dispositif de pression pour bande en deplacement

Publications (2)

Publication Number Publication Date
EP0700470A1 EP0700470A1 (fr) 1996-03-13
EP0700470B1 true EP0700470B1 (fr) 2000-03-22

Family

ID=20390063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93919793A Expired - Lifetime EP0700470B1 (fr) 1993-05-27 1993-09-08 Dispositif de pression pour bande en deplacement

Country Status (10)

Country Link
EP (1) EP0700470B1 (fr)
JP (1) JP2899414B2 (fr)
KR (1) KR960703446A (fr)
AT (1) ATE191023T1 (fr)
BR (1) BR9307856A (fr)
CA (1) CA2163532A1 (fr)
DE (1) DE69328199T2 (fr)
FI (1) FI111090B (fr)
PL (1) PL171819B1 (fr)
WO (1) WO1994028239A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400707A (en) * 1992-10-09 1995-03-28 Champion International Corporation Apparatus for finishing a continuous sheet of paper
US6007921A (en) * 1992-10-09 1999-12-28 Champion International Corporation Continuous finishing belt capable of finishing surface of a web of paper
WO1996021769A1 (fr) * 1995-01-10 1996-07-18 The Procter & Gamble Company Papier de haute densite et son procede de fabrication
US6821386B2 (en) 1995-01-10 2004-11-23 The Procter & Gamble Company Smooth, micropeak-containing through air dried tissue
JP3902649B2 (ja) * 1995-01-10 2007-04-11 ザ、プロクター、エンド、ギャンブル、カンパニー 円滑で通過空気乾燥ティッシュ及びその製造方法
US6551453B2 (en) 1995-01-10 2003-04-22 The Procter & Gamble Company Smooth, through air dried tissue and process of making
FI101985B1 (fi) * 1996-12-10 1998-09-30 Valmet Corp Menetelmä ja laitteisto kuiturainan kuivaamiseksi
FI102304B1 (fi) * 1997-04-02 1998-11-13 Valmet Corp Kalanterointimenetelmä ja menetelmää soveltava kalanteri
FI102305B (fi) * 1997-04-02 1998-11-13 Valmet Corp Kalanterointimenetelmä ja menetelmää soveltava kalanteri
US6203307B1 (en) * 1997-08-28 2001-03-20 Champion International Corporation System for finishing surface of a web of paper having an improved continuous finishing belt
AU9127698A (en) * 1997-10-31 1999-05-24 Beloit Technologies, Inc. Soft nip calender
US6287424B1 (en) 1998-09-22 2001-09-11 International Paper Company Method for finishing paperboard to achieve improved smoothness
US6332953B1 (en) 1998-10-02 2001-12-25 International Paper Company Paper product having enhanced printing properties and related method of manufacture
US6190500B1 (en) 1998-10-02 2001-02-20 International Paper Company Multilayer linerboard having improved printing properties and related method of manufacture
US6946186B2 (en) 2002-08-24 2005-09-20 International Paper Co. Uncoated facestock for adhesive-backed labels
WO2004101885A1 (fr) * 2003-05-13 2004-11-25 Mitsubishi Heavy Industries, Ltd. Presse a lisser de presse a papier, presse de machine a papier a presse a lisser, et procede de fabrication de papier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI74065C (fi) * 1985-10-04 1987-12-10 Waertsilae Oy Ab Kalander, t.ex. superkalander.
ATE125893T1 (de) * 1991-01-24 1995-08-15 Erik Nykopp Pressanordnung für eine fortlaufende bahn.

Also Published As

Publication number Publication date
EP0700470A1 (fr) 1996-03-13
BR9307856A (pt) 1996-01-16
ATE191023T1 (de) 2000-04-15
WO1994028239A1 (fr) 1994-12-08
FI111090B (fi) 2003-05-30
PL171819B1 (pl) 1997-06-30
CA2163532A1 (fr) 1994-12-08
DE69328199D1 (de) 2000-04-27
DE69328199T2 (de) 2000-10-05
PL311744A1 (en) 1996-03-18
FI955672A0 (fi) 1995-11-24
JP2899414B2 (ja) 1999-06-02
JPH08510014A (ja) 1996-10-22
FI955672A (fi) 1995-11-24
KR960703446A (ko) 1996-08-17

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