EP0643167A1 - Dispositif d'enduction d'un bande de papier - Google Patents

Dispositif d'enduction d'un bande de papier Download PDF

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Publication number
EP0643167A1
EP0643167A1 EP93112695A EP93112695A EP0643167A1 EP 0643167 A1 EP0643167 A1 EP 0643167A1 EP 93112695 A EP93112695 A EP 93112695A EP 93112695 A EP93112695 A EP 93112695A EP 0643167 A1 EP0643167 A1 EP 0643167A1
Authority
EP
European Patent Office
Prior art keywords
paper web
air
nip
rollers
coating
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.)
Withdrawn
Application number
EP93112695A
Other languages
German (de)
English (en)
Inventor
Rudolf Dipl.-Ing. Beisswanger
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to EP93112695A priority Critical patent/EP0643167A1/fr
Priority to AT94111844T priority patent/ATE162251T1/de
Priority to EP19940111844 priority patent/EP0643168B1/fr
Priority to DE59405014T priority patent/DE59405014D1/de
Priority to KR1019940019334A priority patent/KR950006146A/ko
Priority to FI943657A priority patent/FI105580B/fi
Priority to US08/286,534 priority patent/US5496406A/en
Priority to JP6186190A priority patent/JPH07163924A/ja
Priority to CA002129724A priority patent/CA2129724A1/fr
Publication of EP0643167A1 publication Critical patent/EP0643167A1/fr
Withdrawn legal-status Critical Current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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/185—Supporting webs in hot air dryers
    • D21F5/187—Supporting webs in hot air dryers by air jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/14—Advancing webs by direct action on web of moving fluid
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/001—Drying webs by radiant heating
    • D21F5/002—Drying webs by radiant heating from infrared-emitting elements
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only

Definitions

  • the invention relates to a device for painting a paper web. Reference is made to the preamble of claim 1.
  • both sides of the paper web need not be deleted.
  • the invention has for its object to design a coating device according to the preamble of claim 1 such that the orange peel effect is reduced in an even better manner or completely eliminated without any significant additional effort.
  • the inventor has recognized that two parameters are crucial that have not been considered so far: one parameter is the trigger angle, i.e. the angle at which the paper web leaves the nip after the coating has been applied, and the other parameter is the web tension which prevails in the paper web after the nip. Both must be precisely adjustable.
  • the second parameter poses particular difficulties, since the coated paper web, which is still moist, cannot be passed through a pair of draw rollers, i.e. a pair of driven rollers that clamp the web between them and thus transmit a certain tensile force to the web.
  • a particularly favorable embodiment of the invention is to provide two such air girders, on two opposite sides of the paper web, and to offset these two air girders in the direction of travel of the paper web, and to arrange them in such a way that the paper web has to perform a double deflection which is thus S-shaped. It has been shown that ideal conditions can be established.
  • Figure 1 shows a coating system with two coating stations and with drying devices located between them.
  • Figures 2 to 5 show coating stations, the guiding organs are connected in different embodiments and in different arrangements.
  • a first coating station 1 which has two rollers.
  • a coating unit 1.1 is assigned to one of these two rollers.
  • the coating station is followed by a traction device, comprising two supporting air beams 2 and 3. This is followed by an infrared drying section 4, a short dryer section 5 with three drying cylinders 5.1, 5.2 and 5.3, a suction guide roller 5.4 and a series of guide rollers.
  • a second coating station 6 in turn has two rollers.
  • An application unit 6.1 is assigned to one roller.
  • An infrared drying section 7 and an end drying group 8 then follow.
  • the system shown in Figure 2 comprises a two-row cylinder dryer section 1, from which one can still see the end, a smoothing unit 3, a first coating station 5, one of these downstream dryer 6, a dryer section 7 with drying cylinders, a second coating station 8, another dryer 9, a dryer section 9.1 with drying cylinders and a reeling station 10.
  • the two coating stations 5 and 8 each have two nozzle applicators 5.1, 5.2 or 8.1 and 8.2. This means that the paper web can be coated on both sides in each coating station.
  • the dryers 6 and 9 are floating dryers, which carry the web freely and bring them to such a dry content (at least 70% dry) that the line in the subsequent cylinder dry groups 7 and 9.1 is touchable.
  • Figures 3-6 each show schematically Order stations, downstream control organs and drying facilities downstream of these.
  • the application station according to FIG. 3 comprises two rollers 10, 20.
  • One of these two application rollers, namely the roller 10, is assigned a nozzle application unit 10.1.
  • the other roller 20 is free of such an application.
  • the paper web 11 is passed in the direction of the arrow through a nip which is formed from the lateral surfaces of the two rollers 10 and 20.
  • a guide element in the form of an air bar 12 follows the roll nip.
  • the air bar is only shown schematically. It consists of a hollow profile bar which has a plurality of bores 12.1 on its side facing the paper web 11. The bores 1 extend over the entire length of the air bar 12, and thus over the entire width of the paper web 11.
  • An infrared drying section 13 is connected to the supporting air bar 12, followed by a floating drying section 14. This also has supporting air bars 14.1, 14.2, 14.3, which are only indicated in outline.
  • the paper web 11 is guided as follows: after the apex of the two rollers, the paper web 11 first wraps around the roller 10 by a specific wrap angle x. It then wraps around the air bar 12, which in turn undergoes a slight deflection. Further redirections take place within the floating dry section as it passes through the supporting air beams 14.1, 14.2, 14.3.
  • FIG. 4 again shows a coating device with two application rollers 10 and 20.
  • a nozzle application unit 10.1 or 10.2 is assigned to both application rollers.
  • the paper web 11 thus receives a line on both sides.
  • the nozzle 10.1 can also be omitted, so that only a single side of the paper web 11 receives a line.
  • Two air carrier bars 22 and 23 follow the application gap. These are arranged on opposite sides.
  • An infrared section 24 and a floating drying station 25 follow.
  • the paper web 11 leaves the nip, whereby it wraps around the roller 10 only very slightly.
  • the wrap angle x is thus so small that it cannot be seen in the illustration.
  • the wrapping of the supporting air beams 22 and 23 is only a very slight one, so that they are also not recognized.
  • only one of the two application rollers, namely the roller 10, is assigned an application unit 10.1.
  • a bank of three supporting air bars 30, 31, 32 follows the roller gap, followed by an infrared path 34 and a floating drying station 35.
  • the paper web 11 is again coated on both sides.
  • the roll nip is first followed by an air bar 40 arranged on one side of the web, followed by a bank of air bars 41 and 42 arranged on the other side of the paper web 11.
  • An infrared path 42 and a floating drying station 43 follow.
  • FIGS. 7a to 7d show embodiments of air bar.
  • the airfoil of the airbar according to FIG. 7a has a single row of bores from which the air flows out.
  • the holes are along one arranged in a straight line.
  • the bores are offset from one another.
  • two rows of air bores are arranged transversely to the direction of web travel, again in each case along a straight line.
  • the direction of web travel is indicated by an arrow A.
  • the two supporting air beams 50, 60 have slots. These can extend across the entire width of the web (i.e. over the entire length of the individual bar); however, several such slots can also be arranged one behind the other per bar. As can be seen, the slot in each bar is located upstream in relation to the incoming paper web 11. An air curtain emerges from the slots - see arrows B.
  • an air bar 60 can be seen.
  • This in turn has air slots in its two edge areas, which extend over the entire width of the paper web and thus over the entire length of the air bar.
  • Arrows B are again shown here, each of which is intended to illustrate an "air curtain”.
  • This box is provided with a row of holes 60.2. The air that was brought in from the slots is sucked in again through these bores and then discharged laterally — not shown here — from box 60.1.
  • This arrangement is used to produce a stable air cushion.
  • a perforated plate 60.2 is provided in the hollow air beam 60.

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  • Paper (AREA)
EP93112695A 1993-08-07 1993-08-07 Dispositif d'enduction d'un bande de papier Withdrawn EP0643167A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP93112695A EP0643167A1 (fr) 1993-08-07 1993-08-07 Dispositif d'enduction d'un bande de papier
AT94111844T ATE162251T1 (de) 1993-08-07 1994-07-29 Vorrichtung zum streichen einer papierbahn
EP19940111844 EP0643168B1 (fr) 1993-08-07 1994-07-29 Dispositif de l'enduction d'une bande de papier
DE59405014T DE59405014D1 (de) 1993-08-07 1994-07-29 Vorrichtung zum Streichen einer Papierbahn
KR1019940019334A KR950006146A (ko) 1993-08-07 1994-08-05 종이웨브 피복장치
FI943657A FI105580B (fi) 1993-08-07 1994-08-05 Laite paperirainan päällystämiseksi
US08/286,534 US5496406A (en) 1993-08-07 1994-08-05 Coating device having infrared and suspension drying sections
JP6186190A JPH07163924A (ja) 1993-08-07 1994-08-08 紙ウェブのコーティング装置
CA002129724A CA2129724A1 (fr) 1993-08-07 1994-08-08 Machine de couchage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93112695A EP0643167A1 (fr) 1993-08-07 1993-08-07 Dispositif d'enduction d'un bande de papier

Publications (1)

Publication Number Publication Date
EP0643167A1 true EP0643167A1 (fr) 1995-03-15

Family

ID=8213148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112695A Withdrawn EP0643167A1 (fr) 1993-08-07 1993-08-07 Dispositif d'enduction d'un bande de papier

Country Status (1)

Country Link
EP (1) EP0643167A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29511088U1 (de) * 1995-07-08 1995-09-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Vorrichtung zum Herstellen einer gestrichenen Materialbahn
EP0770731A1 (fr) * 1995-10-25 1997-05-02 Valmet Corporation Méthode et dispositif pour le séchage d'un revêtement sur une feuille de papier ou équivalent
EP1348809A1 (fr) * 2002-03-22 2003-10-01 Voith Paper Patent GmbH Appareil de couchage
EP1559834A1 (fr) * 2004-01-28 2005-08-03 Voith Paper Patent GmbH Procédé de revetement
EP2003245A1 (fr) 1997-01-27 2008-12-17 Metso Paper, Inc. Machine de couchage du papier et procédé pour coucher du papier
CN116856200A (zh) * 2023-07-25 2023-10-10 孝感市雅都新材料防伪包装有限公司 一种镭射转移纸生产涂布装置及方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507218A1 (fr) * 1991-04-04 1992-10-07 J.M. Voith GmbH Section de séchage

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507218A1 (fr) * 1991-04-04 1992-10-07 J.M. Voith GmbH Section de séchage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BUCKLEY,E.L.: "Different Technologies and Applications of Drying and Spooner-Tec Air-Support.", BULLETIN OF THE INSTITUTE OF PAPER CHEMISTRY, vol. 59, no. 4, October 1988 (1988-10-01), APPLETON US, pages 3919, XP000028285 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29511088U1 (de) * 1995-07-08 1995-09-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Vorrichtung zum Herstellen einer gestrichenen Materialbahn
EP0770731A1 (fr) * 1995-10-25 1997-05-02 Valmet Corporation Méthode et dispositif pour le séchage d'un revêtement sur une feuille de papier ou équivalent
US5771602A (en) * 1995-10-25 1998-06-30 Valmet Corporation Method and device for drying a coating on a paper web or equivalent
EP2003245A1 (fr) 1997-01-27 2008-12-17 Metso Paper, Inc. Machine de couchage du papier et procédé pour coucher du papier
EP1348809A1 (fr) * 2002-03-22 2003-10-01 Voith Paper Patent GmbH Appareil de couchage
EP1559834A1 (fr) * 2004-01-28 2005-08-03 Voith Paper Patent GmbH Procédé de revetement
CN116856200A (zh) * 2023-07-25 2023-10-10 孝感市雅都新材料防伪包装有限公司 一种镭射转移纸生产涂布装置及方法

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