EP0767271B1 - Presse à zone de pressage prolongée - Google Patents

Presse à zone de pressage prolongée Download PDF

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Publication number
EP0767271B1
EP0767271B1 EP96114344A EP96114344A EP0767271B1 EP 0767271 B1 EP0767271 B1 EP 0767271B1 EP 96114344 A EP96114344 A EP 96114344A EP 96114344 A EP96114344 A EP 96114344A EP 0767271 B1 EP0767271 B1 EP 0767271B1
Authority
EP
European Patent Office
Prior art keywords
pressing
accordance
pressing device
press
belt
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
EP96114344A
Other languages
German (de)
English (en)
Other versions
EP0767271A1 (fr
Inventor
Ernst Dipl.-Ing. Kohler
Ulrich Dr. Altenhofen
Bernd Sabrowski
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.)
Wuerttembergische Filztuchfabrik D Geschmay GmbH
Wurttembergische Filztuchfabrik D Geschmay GmbH
Original Assignee
Wuerttembergische Filztuchfabrik D Geschmay GmbH
Wurttembergische Filztuchfabrik D Geschmay 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 Wuerttembergische Filztuchfabrik D Geschmay GmbH, Wurttembergische Filztuchfabrik D Geschmay GmbH filed Critical Wuerttembergische Filztuchfabrik D Geschmay GmbH
Publication of EP0767271A1 publication Critical patent/EP0767271A1/fr
Application granted granted Critical
Publication of EP0767271B1 publication Critical patent/EP0767271B1/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
    • 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

Definitions

  • the invention relates to a pressing device with an extended Press zone, which is a press roll, at least one press felt Press belt and a press shoe, wherein between Press shoe and press belt a lubricant film is located.
  • a paper web becomes one subjected to continuous drying process. It goes through the paper web also one or more drying stages, in which they raised between heated rolls of a Temperature and a significant pressure is exposed. Here becomes the water still contained in the paper web mostly evaporated.
  • the paper web which is fed to the drying stage, only a little Contains water because a smaller amount of water evaporates faster or with less energy input.
  • the purpose of the drying step is at least one Pressing device with an extended press zone (long gap presses or shoe presses) upstream.
  • Such a press device has a larger pressure zone than two in the machine direction conventional, counter-rotating rollers.
  • the Press device consists of a press roll and a corresponding press shoe. The paper web runs between Press roll and press shoe. So every area of the Paper web exposed to increased pressure for a long time and thus more drained.
  • Press shoe and press roll at least one liquid impermeable press belt.
  • the paper side is between one or two press felts.
  • the press felts suck the emerging Water on.
  • press belt To reduce the friction between the press belt and press shoe decrease, the press belt is generally with oil lubricated. For this reason, it must be completely be impermeable to liquids, because otherwise the oil through the Press the press belt and press felt and the paper web would pollute. Therefore, press belts are usually used one made of a basic fabric (carcass) with uniform Layer and a resin coating of uniform thickness exist and mostly with a fiber reinforcement (because of the high contact pressure) are provided. Through the coating however, the press belt becomes relatively stiff. This is from Disadvantage, because there are very large pressures on the press shoe Deflecting rolls of considerable flexing work and mostly also is subjected to considerable tensile stress.
  • U.S. Patent 4,482,430 there is also one Liquid-impermeable press belt described with Water is lubricated.
  • the side of the press shoe applied coating consists of a compressible Material and has grooves for absorbing the water. During the pressing process, the coating is compressed, and the press belt floats on a film of water.
  • the disadvantage of it is the low resilience of the compressible material with flexing and tensile stress.
  • the object of the present invention is therefore a To create press device with an extended press zone at which the press belt satisfactorily flexible, tensile and is low wear.
  • the press belt is permeable to liquid and the lubricant film Water or a mono- or polyhydric alcohol with up to 12 carbon atoms or a mixture of two or more of these substances.
  • the pressing device according to the invention has the great advantage that the conflict described above is avoided.
  • On liquid-permeable press belt is inevitable more flexible than a coated, liquid impermeable Tape.
  • water or alcohol as Lubricant does no harm if part of the Lubricant through the press belt into the paper web crosses.
  • the amount necessary for lubrication is compared to that Very little amount of water present in the paper web.
  • the alcohols used according to the invention can be based on their relatively high vapor pressure in the subsequent Drying process easily removed from the paper web become.
  • the alcohols can also be obtained by thermal means alone Action with the substances contained in the paper web not react.
  • Suitable is e.g. on porous press belt made of a base fabric and a porous one Coating.
  • base fabric all spinnable, temperature and water resistant plastics suitable deliver a fiber with high tensile strength. It happens all stabilized polyester, numerous polyamides, High modulus polyolefins, but also polyaramides. Also plastics with aromatic or heterocyclic Monomers are suitable, as are polyfluorinated ones Hydrocarbons.
  • a coating is available porous, generally slotted or perforated film on. It can be done by heat activation with the base fabric connected or glued to the base fabric. As Porous coating can also be made from a needled fleece Serve filaments. The same materials as are suitable for the base fabric, also mineral fibers, Glass fibers or carbon fibers.
  • the press belt can just as well be a simple spiral belt be or a simple fabric with no coating.
  • the press shoe itself can be made of metal, plastic or Ceramics exist. Plastic and ceramics are on offer especially because they have reduced friction.
  • the lubricant is sprayed on Infeed of the paper web sprayed onto the press belt from below.
  • the sprayer at the inlet can also be aligned in this way be that not the press belt, but the press shoe is sprayed.
  • water e.g. one or polyhydric butyl alcohols, amyl alcohols or hexyl alcohols as well as ethylene glycol, diethylene glycol or glycerin become.
  • the pressing device according to the invention can be among the usual Conditions like the conventional pressing devices operate.
  • Figure 1 shows a pressing device 1 with an extended Press zone 2, in which a paper web 7 between a press belt 3 (e.g. press felt) and a paper machine felt 3 'in Arrives in the direction of arrow A.
  • the press device 1 consists essentially of a press roll 4 and a Press shoe 5, in the direction of arrow B. Contact pressure between the press roll 4 and press shoe 5 lying paper web 7 is exercised.
  • the press shoe 5 is made e.g. made of ceramic. It points to the press roller 4 facing side a concave surface 6 on which the Press belt 3 rests.
  • the press belt 3 consists of a usual plastic fabric that on the bottom 8, so on the side facing the press shoe 5, with a e.g. porous smooth film is laminated.
  • the press belt 3 rotates Roll 12 um.
  • a nozzle 13 which via a supply line with a lubricant containing Storage container is connected (not shown). So that will the bottom 8 of the press belt 3 with a lubricant (a mixture of e.g. water and glycerin) sprayed, see above that between press shoe 5 and press belt 3 Lubricant film 9 is formed. Dash-dotted is one further possible arrangement of the nozzle 14 shown in the not the bottom 8 of the press belt 3, but the Surface 6 of the press shoe 5 is sprayed.

Landscapes

  • Paper (AREA)
  • Finger-Pressure Massage (AREA)
  • Massaging Devices (AREA)

Claims (18)

  1. Dispositif de compression (1) comportant une zone de contact prolongée (2) qui comprend un rouleau presseur (4), au moins un feutre comprimé (3), une bande de compression (3) et un patin de compression (5), un film de lubrifiant (9) se trouvant entre le patin de compression (5) et la bande de compression (3), caractérisé en ce que la bande de compression (3) est perméable aux liquides et en ce que le film de lubrifiant est constitué d'eau ou d'un alcool monovalent ou polyvalent comportant jusqu'à 12 atomes de carbone ou d'un mélange de deux ou plusieurs de ces corps.
  2. Dispositif de compression selon la revendication 1, caractérisé en ce que l'on prévoit seulement un feutre comprimé (3').
  3. Dispositif de compression selon la revendication 1 ou 2, caractérisé en ce que la bande de compression (3) est poreuse.
  4. Dispositif de compression selon la revendication 3, caractérisé en ce que la bande de compression (3) comporte un tissu de fond et un revêtement poreux sur sa face inférieure (8).
  5. Dispositif de compression selon la revendication 4, caractérisé en ce que le revêtement est une feuille en matière synthétique comportant des fissures ou des perforations.
  6. Dispositif de compression selon la revendication 4, caractérisé en ce que le revêtement est une étoffe nappée.
  7. Dispositif de compression selon la revendication 6, caractérisé en ce que l'étoffe nappée est constituée de filaments de matière synthétique, de fibres de carbone, de fibres minérale ou de fibres de verre.
  8. Dispositif de compression selon l'une quelconque des revendications 4 à 7, caractérisé en ce que le tissu de fond est constitué de matériau composite.
  9. Dispositif de compression selon l'une quelconque des revendications 4 à 8, caractérisé en ce que le tissu de fond est un tissu ou un tissu végétal (à base de céréales).
  10. Dispositif de compression selon l'une quelconque des revendications 4 à 9, caractérisé en ce que le tissu de fond est un tissu à côtes.
  11. Dispositif de compression selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande de compression (3) est un filtre en spirale.
  12. Dispositif de compression selon l'une quelconque des revendications 1 à 9, caractérisé en ce que la bande de compression (3) est munie de fils en matière synthétique sur sa face inférieure (8).
  13. Dispositif de compression selon l'une quelconque des revendications 1 à 12, caractérisé en ce qu'un dispositif de pulvérisation (13, 14) se trouve au voisinage du patin de compression (5).
  14. Dispositif de compression selon la revendication 13, caractérisé en ce que le dispositif de pulvérisation (13, 14) est dirigé vers la face inférieure (6) de la bande de compression (3).
  15. Dispositif de compression selon la revendication 13, caractérisé en ce que le dispositif de pulvérisation (13, 14) est dirigé vers la face supérieure (6) du patin de compression (5).
  16. Dispositif de compression selon l'une quelconque des revendications 1 à 15, caractérisé en ce que l'alcool est un alcool butylique monovalent ou polyvalent, un alcool amylique ou un alcool hexylique ou un éthylène glycol ou de la glycérine.
  17. Dispositif de compression selon l'une quelconque des revendications 1 à 16, caractérisé en ce que le film de lubrifiant est constitué par un mélange d'eau et de glycérine.
  18. Dispositif de compression selon l'une quelconque des revendications 1 à 17, caractérisé en ce que la zone de contact prolongée (2) a une longueur allant jusqu'à 25 cm.
EP96114344A 1995-10-06 1996-09-07 Presse à zone de pressage prolongée Expired - Lifetime EP0767271B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537182 1995-10-06
DE19537182A DE19537182A1 (de) 1995-10-06 1995-10-06 Preßvorrichtung mit verlängerter Preßzone

Publications (2)

Publication Number Publication Date
EP0767271A1 EP0767271A1 (fr) 1997-04-09
EP0767271B1 true EP0767271B1 (fr) 2000-01-05

Family

ID=7774144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96114344A Expired - Lifetime EP0767271B1 (fr) 1995-10-06 1996-09-07 Presse à zone de pressage prolongée

Country Status (3)

Country Link
EP (1) EP0767271B1 (fr)
AT (1) ATE188522T1 (fr)
DE (2) DE19537182A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704145A1 (de) * 1997-02-04 1998-08-06 Voith Sulzer Papiermasch Gmbh Maschine zur Herstellung einer Faserstoffbahn
DE19723172A1 (de) * 1997-06-03 1998-12-10 Geldmacher Joachim Preßvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106555B (en) * 1981-09-15 1985-10-02 Albany Int Corp Improvements relating to extended nip dewatering presses and to the manufacture of belts for use in such presses
FR2513281B1 (fr) * 1981-09-24 1985-07-26 Albany Int Corp Presse pour extraire l'eau d'une pate a papier et procede de fabrication d'une courroie pour une telle presse
FI75620C (fi) * 1982-04-01 1988-07-11 Tampella Oy Ab Laongzonspress foer en pappersmaskin.
ZA859176B (en) * 1985-03-13 1986-08-27 Albany Int Corp Papermaking belt with smooth inner surface and method of making same
DE9201143U1 (fr) * 1992-01-31 1992-03-26 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4234448A1 (de) * 1992-10-13 1993-02-11 Voith Gmbh J M Reinigungsvorrichtung fuer ein umlaufendes band in einer papiermaschine

Also Published As

Publication number Publication date
ATE188522T1 (de) 2000-01-15
EP0767271A1 (fr) 1997-04-09
DE59604099D1 (de) 2000-02-10
DE19537182A1 (de) 1997-04-10

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