EP3837394A1 - 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

Info

Publication number
EP3837394A1
EP3837394A1 EP19749318.2A EP19749318A EP3837394A1 EP 3837394 A1 EP3837394 A1 EP 3837394A1 EP 19749318 A EP19749318 A EP 19749318A EP 3837394 A1 EP3837394 A1 EP 3837394A1
Authority
EP
European Patent Office
Prior art keywords
web
press
paper machine
drying
press nip
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.)
Pending
Application number
EP19749318.2A
Other languages
German (de)
English (en)
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
Pending legal-status Critical Current

Links

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 cardboard web comprising a headbox, a former for sheet formation, a press section for dewatering and a drying section for drying the web, the web being guided through at least two press nips within the press section, together with on both sides runs an endlessly circulating, water-absorbing drainage belt through the first press nip and together with only one drainage belt through the last press nip.
  • the invention also relates to a method for producing a paper or cardboard web which has a filler content 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 object with regard to the paper machine was achieved in that, after the first press nip, its lower dewatering band is guided away from the web, the opposite, upper dewatering band transfers the web to a lower dewatering band in the second and last press nip, and this second press nip is extended.
  • This press section which is limited to two press nips, is associated with relatively little effort and, because of 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 rolls or can be extended.
  • the web is constantly guided by a belt or roller, which counteracts a break even at higher machine speeds.
  • the extended, second press nip should advantageously be formed by a lower shoe press roll with a flexible roll jacket and a cylindrical, upper press roll. After the second press nip, the web runs along the smooth lateral surface of the upper press roller until it is transferred to an air-permeable dryer fabric in the dryer section.
  • the smooth surface of the upper press roller 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 train in which the web runs unsupported can be realized.
  • the dryer fabric should wrap around a guide roller that is slightly spaced from the upper press roller and vacuumed.
  • the web is advantageously guided alternately in a meandering manner over heated drying cylinders and guide rollers, at least one scraper being assigned to the first drying cylinder following the press section.
  • edges separated from the web can be removed from the drying cylinder.
  • a pulper is arranged under and between the first drying cylinder and the following guide roller.
  • a suction device should be arranged between the first drying cylinder and the following guide roller on the side of the dryer fabric facing away from the web.
  • At least one blowing device is arranged, the blowing width of which is directed towards the respective web edge to adapt to the position and width of the web edge transversely to the web running direction.
  • the detachment of the web edges can also be supported in that the first drying cylinder has a ceramic coating.
  • the web in the former is at least essentially only dewatered downward and only together through the last press nip of the press section runs with a lower drainage belt.
  • the web in the former is only dewatered downwards and, accordingly, the former has one or more water-permeable forming fabrics which are guided endlessly over guide rollers and run exclusively under the web.
  • the web is always supported by one element from the former to the last press nip.
  • the invention is particularly suitable for webs with a high filler content 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.
  • Figure 1 a system diagram of a first part of a paper machine for the production of decorative paper
  • Figure 2 an alternative press section thereof.
  • the decorative paper has a high filler content between 20 and 42%, in particular between 35 and 40%.
  • the filler is essentially or exclusively formed by titanium dioxide.
  • the stock suspension is applied evenly distributed over the width of the web to the lower, endlessly circulating forming fabric 19 of the adjacent former 3.
  • sheets are formed as a result of dewatering through the water-permeable forming screen 19 guided over guide rollers 18, i.e. the drainage takes place exclusively downwards.
  • This drainage is promoted by means of a vacuum, which starts from the foils and suction boxes 20 present under the forming fabric 19.
  • 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 under the web 1 through a first press nip of the press section.
  • this press nip is formed by a lower cylindrical press roll 22 and an upper, vacuumed press roll 23.
  • the lower dewatering belt 5 is led away from the web 1, the web 1 with the upper dewatering belt 4 looping around the upper press roller 23.
  • the suppression of the upper press roller 23 ensures reliable guidance on the upper drainage belt 4.
  • the first press nip in FIG. 2 is formed by a lower shoe press roll 22 and an upper, cylindrical press roll 23.
  • the web 1 is guided between the two drainage belts 4, 5.
  • the lower dewatering band 5 is only led away from the web 1 in the looping area of a suction-guided guide roller of the upper dewatering band 4.
  • the web 1 is then transferred in both cases from the upper dewatering belt 4 to a lower dewatering belt 6 of a second and last press nip of the press section.
  • the takeover is supported by a suction guide roller 24 wrapped around by the lower dewatering belt 6.
  • the second press nip is elongated and for this purpose is formed by a lower shoe press roll 7 and an upper, cylindrical press roll 8 with a smooth outer surface.
  • Shoe press rolls 7 have a flexible roll jacket, which is pressed by a press shoe with a concave pressing surface to form an extended press nip to the cylindrical counter-press roll 8. Because of the longer dwell time of web 1 in the press nip, they enable intensive but gentle drainage.
  • the water-absorbing drainage belts 4, 5, 6 are designed as endless circulating press felts.
  • the vacuumed press roller 23 as well as the vacuumed guide rollers 10, 12 have a perforated roller jacket, the interior of which is at least partially connected to a vacuum source.
  • the top of the web 1 at the end of the press section is smoother than the bottom. This is further supported by the fact that a low-marking upper side of the web 1 was already produced in the former 3.
  • the lower dewatering belt 6 is moved away from the web 1 and the web 1 alone on the jacket of the smooth cylindrical press roller 8 until it is transferred to an air-permeable dryer fabric 9 of a subsequent dryer section for drying the web 1.
  • the air-permeable dryer fabric 9 wraps around a guide roller 10 which is slightly spaced from the upper press roller 8 and is vacuumed.
  • the web 1 runs with a short free train, i.e. unsupported. So 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% with this first free train.
  • the web 1 is supported by the dryer fabric 9, alternately guided in a meandering manner over heated drying cylinders 11 and suctioned guide rollers 12.
  • a removal scraper 15 and possibly also a subsequent cleaning scraper are assigned to the first drying cylinder 11 of the drying section.
  • the take-off scraper 15 separates the web 1 or its transfer strip when transferring it from the drying cylinder 11 and then guides it 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 detachment 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 wire 9 facing away from the web.
  • the suppression of the suction device 13 improves the adhesion of the web 1 or a transfer strip to the dryer fabric 9.
  • blowing device 17 promotes the detachment of the web 1, but in particular the transfer strip at the web edge from the dryer fabric 9.
  • the suction width and the blowing width directed at the web 1 can be changed transversely to the web running direction 16.

Abstract

L'invention concerne une machine à papier pour la fabrication d'une bande de papier ou de carton (1), comprenant une caisse de tête (2), une table de formation (3) pour la formation de feuilles, une partie de pressage pour l'élimination de l'eau ainsi qu'une sécherie pour le séchage de la bande (1), la bande (1) étant guidée, dans la partie de pressage, à travers au moins deux fentes de pressage, passant ensemble avec une bande d'égouttage (4, 5) absorbant l'eau en rotation sans fin de chaque côté à travers la première fente de pressage et ensemble avec une seule bande d'égouttage (6) à travers la dernière fente de pressage. Pour permettre un fonctionnement sûr même à des vitesses de machine supérieures à 1000 m/min, après la première fente de pressage la bande d'égouttage inférieure (5) est éloignée de la bande (1), la bande d'égouttage supérieure (4) opposée passe la bande (1) à une bande d'égouttage inférieure (6) de la deuxième et dernière fente de pressage et cette deuxième fente de pressage est allongée.
EP19749318.2A 2018-08-14 2019-07-31 Machine à papier et procédé pour la fabrication d'une bande de papier ou de carton Pending EP3837394A1 (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 (1)

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

Family

ID=67539502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19749318.2A Pending EP3837394A1 (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) EP3837394A1 (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
US6702925B2 (en) * 2000-12-22 2004-03-09 Vibre-Tech Llc Method and apparatus for forming a paper or tissue web
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

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