EP3837394B1 - Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton - Google Patents

Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton Download PDF

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Publication number
EP3837394B1
EP3837394B1 EP19749318.2A EP19749318A EP3837394B1 EP 3837394 B1 EP3837394 B1 EP 3837394B1 EP 19749318 A EP19749318 A EP 19749318A EP 3837394 B1 EP3837394 B1 EP 3837394B1
Authority
EP
European Patent Office
Prior art keywords
web
paper machine
machine according
paper
roller
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.)
Active
Application number
EP19749318.2A
Other languages
German (de)
English (en)
Other versions
EP3837394A1 (fr
Inventor
Reinhard Leigraf
Thorsten HEIDT
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 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 Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3837394A1 publication Critical patent/EP3837394A1/fr
Application granted granted Critical
Publication of EP3837394B1 publication Critical patent/EP3837394B1/fr
Active 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
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/44—Watermarking devices
    • D21F1/46—Dandy rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • 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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • 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
    • D21F5/02—Drying on cylinders
    • D21F5/021—Construction of the cylinders
    • 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
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/006—Cutting the edges of the paper-web

Definitions

  • the invention relates to a paper machine for producing a paper or board web comprising a headbox, a former for sheet formation, a press section for dewatering and a drying section for drying the web, wherein the web is guided within the press section through at least two press nips, runs together with an endlessly circulating, water-absorbing dewatering belt on both sides through the first press nip and together with only one dewatering belt through the last press nip.
  • the invention also relates to a method for producing a paper or cardboard web having a filler content of between 20 and 42%, in particular with a machine according to the invention.
  • the object of the invention is therefore to enable safe operation even at high machine speeds.
  • the opposite, upper dewatering belt transfers the web to a lower dewatering belt of the second and last press nip, and this second press nip is designed to be extended.
  • This press section which is limited to two press nips, requires relatively little effort and, thanks to the two dewatering belts, already ensures a very high dewatering performance in the first press nip.
  • the first press nip can be formed by two cylindrical press rollers or can be extended.
  • the web is constantly guided by a belt or roller from the beginning of the former to the last press nip of the press section, which counteracts breakage even at higher machine speeds.
  • the extended, second press nip should preferably be formed by a lower shoe press roll with a flexible roll shell and a cylindrical, upper press roll. After the second press nip, the web runs alone along the smooth surface of the upper press roll until it is transferred to an air-permeable drying screen in the drying section.
  • the smooth surface of the upper press roll ensures good web guidance, but also a relatively smooth surface on the top of the web.
  • the web After the second press nip, the web has a dry content of at least 45%, in particular between 50 and 60%, so that a first, short free draw can be achieved in which the web runs unsupported.
  • the dryer fabric In the area of the web takeover, the dryer fabric should wrap around a guide roll that is slightly spaced from the upper press roll and is suctioned.
  • the web is advantageously guided by at least one drying wire in a meandering pattern alternately over heated drying cylinders and guide rollers, with at least one doctor being assigned to the first drying cylinder following the press section.
  • This scraper can be used to remove edges that have been separated from the web from the drying cylinder.
  • a pulper is arranged under and between the first drying cylinder and the following guide roll.
  • a suction device should be arranged between the first drying cylinder and the following guide roller on the side of the drying fabric facing away from the web, the suction width of which directed towards the web can be changed to adapt to different web widths and web positions transverse to the web travel direction.
  • At least one blowing device is arranged between the drying cylinder and the following guide roller on the side of the drying fabric facing away from the web in the region of at least one web edge, the blowing width of which is directed towards the respective web edge and can be changed transversely to the web running direction in order to adapt to the position and width of the web edge.
  • the separation of the web edges can be further supported by the fact that the first drying cylinder has a ceramic coating.
  • the web is at least substantially only dewatered downwards in the former and runs through the last press nip of the press section only together with a lower dewatering belt, as defined in claim 11.
  • the web is dewatered exclusively downwards in the former and accordingly the former has one or more water-permeable forming screens which are guided endlessly over guide rollers and which run exclusively under the web.
  • the web is always supported by an element from the former to the last press nip.
  • the invention is particularly suitable for webs with a high filler content of between 30 and 50%, preferably between 35 and 50% and in particular between 35 and 40% and/or a filler which is at least predominantly formed by titanium dioxide.
  • the decorative paper has a high filler content of between 20 and 42%, in particular between 35 and 40%.
  • the filler is essentially or exclusively titanium dioxide.
  • the stock suspension is applied evenly distributed across the web width to the lower, continuously rotating forming wire 19 of the adjacent former 3.
  • a pre-pressure roller 21 resting only lightly on the web 1 in the former 3 is covered with a screen and serves to even out the transparency and, if necessary, also to apply watermarks.
  • the web 1 is then transferred from the forming fabric 19 to a water-absorbing, upper dewatering belt 4 of the press section.
  • This dewatering belt 4 then guides the web 1 together with a water-absorbing dewatering belt 5 running beneath the web 1 through a first press nip of the press section.
  • This press gap is determined according to Figure 1 formed by a lower cylindrical press roller 22 and an upper, vacuum-fed press roller 23.
  • the lower dewatering belt 5 is guided away from the web 1, with the web 1 wrapping around the upper press roller 23 with the upper dewatering belt 4.
  • the negative pressure of the upper press roller 23 ensures secure guidance on the upper dewatering belt 4.
  • the first press nip is Figure 2 formed by a lower shoe press roll 22 and an upper, cylindrical press roll 23.
  • the web 1 is guided between the two dewatering belts 4, 5. Only in the wrapping area of a suction-treated guide roll of the upper dewatering belt 4 is the lower dewatering belt 5 guided away from the web 1.
  • the web 1 is then transferred from the upper dewatering belt 4 to a lower dewatering belt 6 of a second and last press nip of the press section.
  • the transfer is supported by a suction-applied guide roller 24 wrapped around the lower dewatering belt 6.
  • the second press nip is extended and is formed by a lower shoe press roller 7 and an upper, cylindrical press roller 8 with a smooth outer surface.
  • Shoe press rolls 7 have a flexible roll shell which is pressed by a press shoe with a concave pressing surface to the cylindrical counter press roll 8 to form an extended press nip. Due to the extended residence time of the web 1 in the press nip, they enable intensive yet gentle dewatering.
  • the water-absorbing drainage belts 4,5,6 are designed as endlessly rotating press felts.
  • the vacuum-fed press roller 23 as well as the vacuum-fed guide rollers 10, 12 have a perforated roller shell, the interior of which is at least partially connected to a vacuum source.
  • the top side of the web 1 at the end of the press section is smoother than the bottom side. This is further supported by the fact that a low-marking top side of the web 1 has already been produced in the former 3.
  • the lower dewatering belt 6 is guided away from the web 1 and the web 1 is guided alone on the jacket of the smooth cylindrical press roll 8 until it is transferred to an air-permeable drying screen 9 of a subsequent drying section for drying the web 1.
  • the latter wraps around a guide roller 10 which is slightly spaced from the upper press roller 8 and is suctioned during the transfer.
  • the web 1 runs between the upper press roll 8 and the drying screen 9 with a short free pull, i.e. unsupported. To ensure that this does not lead to a significant increase in the risk of tearing, the dry content of the web 1 should be at least 45% during this first free pull.
  • the web 1 is supported by the drying wire 9 and guided in a meandering pattern alternately over heated drying cylinders 11 and vacuumed guide rollers 12.
  • a removal doctor 15 and possibly also a subsequent cleaning doctor are assigned to the first drying cylinder 11 of the drying section.
  • the removal doctor 15 separates the web 1 or its transfer strips during transfer from the drying cylinder 11 and then guides them into a pulper 14 located below and between the first drying cylinder 11 and the following guide roller 12.
  • first drying cylinder 11 can also have a ceramic coating, which facilitates the removal of the web 1 or parts thereof.
  • a suction device 13 and a blowing device 17 are arranged between the first drying cylinder 11 and the following guide roller 12 on the side of the drying fabric 9 facing away from the web.
  • the negative pressure of the suction device 13 improves the adhesion of the web 1 or a transfer strip to the drying fabric 9.
  • blowing device 17 promotes the detachment of the web 1, but in particular of the transfer strip at the web edge from the drying fabric 9.
  • the suction width directed onto the web 1 and the blowing width transverse to the web travel direction 16 can be changed.

Landscapes

  • Paper (AREA)

Claims (15)

  1. Machine à papier pour la fabrication d'une bande de papier ou de carton (1), notamment d'une bande de papier décoratif (1), avec une teneur en charge comprise entre 20 et 42 %, comprenant un formeur (3) pour la formation de feuilles et une section de pressage pour l'égouttage, qui présente au moins une dernière fente de pressage, le formeur (3) possédant une ou plusieurs toiles de formation (19) perméables à l'eau, conduites sans fin sur des rouleaux de guidage (18), qui s'étendent exclusivement sous la bande (1), et la bande (1) passant conjointement avec seulement une courroie d'égouttage inférieure (6) à travers la dernière fente de pressage.
  2. Machine à papier selon la revendication 1, dans laquelle la machine à papier comprend une caisse de tête (2), ainsi qu'une section de séchage pour sécher la bande (1), la section de pressage présentant au moins deux fentes de pressage et la bande (1) étant conduite à travers une première fente de pressage conjointement avec, des deux côtés, une courroie d'égouttage (4, 5) absorbant l'eau, circulant sans fin,
    et dans laquelle, après la première fente de pressage, sa courroie d'égouttage inférieure (5) est éloignée de la bande (1), la courroie d'égouttage supérieure opposée (4) transfère la bande (1) à une courroie d'égouttage inférieure (6) de la deuxième et dernière fente de pressage, et cette deuxième fente de pressage est réalisée sous forme prolongée.
  3. Machine à papier selon la revendication 2,
    dans laquelle
    la deuxième et dernière fente de pressage prolongée est formée par un rouleau de pressage inférieur à sabot (7) à enveloppe de rouleau flexible et un rouleau de pressage supérieur cylindrique (8), la bande (1) se déplaçant seule après la deuxième fente de pressage jusqu'au transfert à une toile de séchage perméable à l'air (9) de la section de séchage sur la surface d'enveloppe lisse du rouleau de pressage supérieur (8).
  4. Machine à papier selon la revendication 3,
    dans laquelle
    la bande de papier ou de carton (1) est conduite entre le rouleau de pressage supérieur (8) et la toile de séchage (9) sans être soutenue dans une première traction libre.
  5. Machine à papier selon l'une quelconque des revendications précédentes,
    dans laquelle
    la bande (1) est conduite en méandres à l'intérieur de la section de séchage par au moins une toile de séchage (9} en passant alternativement sur des cylindres de séchage chauffés (11) et des rouleaux de guidage (12), au moins un racloir (15) étant associé au premier cylindre de séchage (11) qui suit la section de pressage.
  6. Machine à papier selon la revendication 5,
    dans laquelle
    un pulpeur (14) est agencé sous et entre le premier cylindre de séchage (11) et le rouleau de guidage (12) suivant.
  7. Machine à papier selon la revendication 5 ou 6, dans laquelle
    entre le premier cylindre de séchage (11) et le rouleau de guidage suivant (12), sur le côté de la toile de séchage (9) détourné de la bande, est agencé un dispositif d'aspiration (13) dont la largeur d'aspiration dirigée vers la bande (1) peut être modifiée transversalement à la direction de défilement de la bande (16) .
  8. Machine à papier selon l'une quelconque des revendications 5 à 7,
    dans laquelle
    entre le premier cylindre de séchage (11) et le rouleau de guidage suivant (12), sur le côté de la toile de séchage (9) détourné de la bande, dans la zone d'au moins un bord de bande, est agencé au moins un dispositif de soufflage (17) dont la largeur de soufflage dirigée vers le bord de bande peut être modifiée transversalement à la direction de défilement de la bande (16).
  9. Machine à papier selon l'une quelconque des revendications 5 à 8,
    dans laquelle
    le premier cylindre de séchage (11) présente un revêtement céramique.
  10. Machine à papier selon l'une quelconque des revendications précédentes, dans laquelle le formeur (3) présente un rouleau de pré-pression (21) qui ne repose que légèrement sur la bande (1).
  11. Procédé de fabrication d'une bande de papier ou de carton (1) présentant une teneur en charge comprise entre 20 et 42 % avec une machine selon l'une quelconque des revendications précédentes, dans lequel
    la bande (1) n'est égouttée dans le formeur (3) au moins essentiellement que vers le bas et ne passe à travers la dernière fente de pressage de la section de pressage que conjointement avec une courroie d'égouttage inférieure (6) .
  12. Procédé selon la revendication 11,
    dans lequel
    la bande (1) est égouttée exclusivement vers le bas dans le formeur (3).
  13. Procédé selon la revendication 11 ou 12,
    dans lequel
    la teneur en charge de la bande (1) est comprise entre 35 et 40 %.
  14. Procédé selon l'une quelconque des revendications 11 à 13,
    dans lequel
    la charge est formée au moins majoritairement de dioxyde de titane.
  15. Procédé selon l'une quelconque des revendications 11 à 14,
    dans lequel
    la teneur en matière sèche de la bande (1) lors de la première traction libre entre le rouleau de pressage supérieur (8) et la toile de séchage (9) est d'au moins 45 %.
EP19749318.2A 2018-08-14 2019-07-31 Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton Active EP3837394B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018119686.5A DE102018119686A1 (de) 2018-08-14 2018-08-14 Papiermaschine
PCT/EP2019/070674 WO2020035318A1 (fr) 2018-08-14 2019-07-31 Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton

Publications (2)

Publication Number Publication Date
EP3837394A1 EP3837394A1 (fr) 2021-06-23
EP3837394B1 true EP3837394B1 (fr) 2024-06-12

Family

ID=67539502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19749318.2A Active EP3837394B1 (fr) 2018-08-14 2019-07-31 Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton

Country Status (4)

Country Link
EP (1) EP3837394B1 (fr)
CN (1) CN112585318A (fr)
DE (1) DE102018119686A1 (fr)
WO (1) WO2020035318A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020131965A1 (de) * 2020-12-02 2022-06-02 Voith Patent Gmbh Papiermaschine
DE102021103519A1 (de) 2021-02-15 2022-08-18 Koehler Innovation & Technology Gmbh Verfahren zur Herstellung einer Faserstoffbahn
CN114438827B (zh) * 2022-01-19 2024-01-12 云南建投第二安装工程有限公司 一种浆板机干燥部风机箱基础改进装置及方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0598991B1 (fr) * 1992-11-24 1996-01-17 J.M. Voith GmbH Section de presse pour une machine à papier
DE19609988A1 (de) * 1996-03-14 1997-09-18 Voith Sulzer Papiermasch Gmbh Pressenpartie einer Papiermaschine
CN2345574Y (zh) * 1998-12-30 1999-10-27 宋大兴 逆顺三网成形不排污水造纸机
FI20002122A (fi) * 2000-06-02 2001-12-03 Metso Paper Inc Sovitelma paperikoneen kuivatusosan alun parantamiseksi
FI111174B (fi) * 2000-10-27 2003-06-13 Metso Paper Inc Menetelmä ja laite rainan päänviennissä paperikoneen tai vastaavan kuivatusosassa
CA2432285A1 (fr) * 2000-12-22 2002-08-08 Vibre-Tech Llc Procede et appareil servant a former une bande de papier ou de tissu
FI116400B (fi) * 2002-11-19 2005-11-15 Metso Paper Inc Paperi- tai kartonkikoneen puristinosa
AT500751B8 (de) * 2003-02-20 2007-02-15 Bartelmuss Klaus Ing Vorrichtung zur behandlung, insbesondere zur unterdruck-beaufschlagung, des in einer anlage zur papiererzeugung vorgesehenen, im umlauf bewegten mindestens einen siebbandes bzw. filzbandes
DE102004037213A1 (de) * 2004-07-30 2006-03-23 Voith Paper Patent Gmbh Pressverfahren
DE102005000046A1 (de) * 2005-04-28 2006-11-02 Voith Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn
DE102005031202A1 (de) * 2005-07-01 2007-01-25 Voith Patent Gmbh Verfahren zur Herstellung einer Papierbahn, insbesondere Tiefdruckpapier
FI7543U1 (sv) * 2007-02-16 2007-06-13 Metso Paper Inc Apparatur vid spetsdragningen vid en pappermaskin eller motsvarande
DE102010029580A1 (de) * 2010-06-01 2011-12-01 Voith Patent Gmbh Maschine zur Herstellung einer Papierbahn insbesondere Sackpapierbahn
CN203007726U (zh) * 2012-12-10 2013-06-19 天津光华包装有限公司 造纸机
CN206173736U (zh) * 2016-08-31 2017-05-17 江苏理文造纸有限公司 节能式网布脱水装置

Also Published As

Publication number Publication date
DE102018119686A1 (de) 2020-02-20
CN112585318A (zh) 2021-03-30
WO2020035318A1 (fr) 2020-02-20
EP3837394A1 (fr) 2021-06-23

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