EP3623525A1 - Machine et procédé de fabrication d'une bande fibreuse - Google Patents

Machine et procédé de fabrication d'une bande fibreuse Download PDF

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Publication number
EP3623525A1
EP3623525A1 EP19185150.0A EP19185150A EP3623525A1 EP 3623525 A1 EP3623525 A1 EP 3623525A1 EP 19185150 A EP19185150 A EP 19185150A EP 3623525 A1 EP3623525 A1 EP 3623525A1
Authority
EP
European Patent Office
Prior art keywords
press
fibrous web
belt
roller
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.)
Withdrawn
Application number
EP19185150.0A
Other languages
German (de)
English (en)
Inventor
Caio Penteado
Jonas BERGSTRÖM
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 EP3623525A1 publication Critical patent/EP3623525A1/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • D21F11/006—Making patterned paper
    • 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
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • 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
    • D21F3/0227—Belts or sleeves therefor
    • 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
    • D21F3/029—Wet presses using special water-receiving belts
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls
    • 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
    • D21F3/10—Suction rolls, e.g. couch rolls
    • 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
    • D21F5/004—Drying webs by contact with heated surfaces or materials
    • 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
    • D21F5/181—Drying webs by hot air on Yankee cylinder
    • 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
    • D21F7/008—Steam showers
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • the invention relates to a machine for producing a fibrous web, in particular a tissue web, with a forming area, comprising a forming roll and a permeable inner belt, which at least partially wraps around this together with an outer band, for forming the fibrous web, with a pressing device directly following the forming area, comprising a a press nip formed by a press roll and a counter roll for further dewatering of the fibrous web, the press nip being the first press nip of the pressing device, the fibrous web being guided through the press nip lying between the inner band and a lower press band, and with a drying cylinder following the press device, wherein the fibrous web is guided from the forming area to the transfer, in a transfer nip formed between a transfer roller and the drying cylinder, from the inner belt to the heated surface of the drying cylinder on the inner belt .
  • the invention also relates to a method for producing a fibrous web, in particular a tissue web.
  • the document EP2796617 B1 discloses a crescent former paper machine for making tissue paper.
  • the tissue web is formed in a forming area between an outer sieve and a felt and, in a first configuration, lies on the felt together with another felt through a shoe press and then transferred in a roller nip to the surface of the subsequent drying cylinder.
  • a roller nip With this configuration, heavy tissue papers with high specific volumes are to be produced in an energy-efficient manner.
  • the tissue web is not passed through the shoe press nip, but is passed directly from the forming area to the surface of the subsequent drying cylinder.
  • the arrangement of a suction felt guide roller for conditioning the felt in front of the shoe press is proposed. The disadvantage of this arrangement is one limited increase in quality, especially the specific volume of the tissue web.
  • the object of the invention is therefore to propose a machine and a method for improving the quality of the tissue web produced, in particular the specific volume, with good runability at high production speed, with efficient use of energy, and simple construction.
  • a machine for producing a fibrous web, in particular a tissue web comprising a forming area, comprising a forming roll and a permeable inner band, which at least partially wraps around this together with an outer band, for forming the fibrous web, with a pressing device directly following the forming area a press nip formed by a press roll and a counter roll for further dewatering of the fibrous web, the press nip being the first press nip of the press device, the fibrous web being guided through the press nip lying between the inner band and a lower press band, and with a drying cylinder following the press device , wherein the fibrous web from the forming area to the transfer, formed in a between a transfer roller and the drying cylinder Transfer nip, from the inner belt to the heated surface of the drying cylinder lying on the inner belt.
  • the inner band for structuring the fibrous web is structured and the transfer roller is designed as
  • This machine is characterized by a simple structure with which a fibrous web, in particular a tissue web with a high specific volume and at the same time a high achievable dry content in the pressing device can be reliably produced at high speed.
  • the formation of the fibrous web on the structured inner band gives it a structure which leads to a high specific volume. This essentially remains even after the press nipple has passed through, since the structure of the inner band protects the structure of the fibrous web during the pressing process.
  • the compressibility of the inner band is preferably less than that of the lower press band.
  • the inner band is permeable, that means permeable to air and water. This enables two-sided dewatering of the fibrous web in the press nip, the squeezed water being partially, that is to a small extent, taken up by the inner band and the lower press band.
  • the lower press belt which is in contact with the fibrous web, can be optimized with regard to the quality, for example the specific volume, the fibrous web produced and a coordinated water absorption. This enables gentle drainage without damaging and crushing the fibrous web. As a result, higher line forces can be driven in the press nip.
  • the web guide without transfer between two fabrics enables reliable and stable operation of the machine, even with high production and speed.
  • the formation of the transfer roller as a shoe roller has an advantageous effect on the transfer of the fibrous web from the inner belt to the heated surface of the drying cylinder. Because of the fibrous web embossed structure of the inner band, the web is only pressed selectively in the transfer nip, which is only driven with a low line load or a low pressure. Therefore, the increased dwell time of the fibrous web in the press nip has a positive effect on the transfer to the drying cylinder.
  • Another advantage of the solution is the compact design with regard to the small space requirement with regard to the overall height of the machine.
  • the length of the lower press belt can be made short.
  • the felt guide of the lower press belt can therefore only extend above the machine floor. This eliminates the need for a basement. This means that this machine can also be installed in existing machine halls without a basement for the production of high-quality tissue webs with a high specific volume, for example kitchen towels.
  • the inner, structured band can be woven. It can also be designed as a permeable membrane or film structured at least on the fibrous web side.
  • the drying cylinder can be designed as a Yankee drying cylinder, in particular in the production of tissue fibrous webs.
  • the construction of Yankee drying cylinders is known. For example, they have a large diameter of over 6 m and are steam-heated.
  • This machine can be easily and inexpensively converted for the production of certain types of tissue with lower demands on the specific volume and higher demands on the production output.
  • the inner, structured belt can be replaced by a conventional press felt and the press device deactivated. This means that the press device either bypasses the guide of this press felt or this press felt is guided through the opened press nip.
  • This arrangement thus corresponds to a known crescent former machine.
  • the lower press belt is designed as a water-absorbing press belt, in particular as a press felt.
  • the press roller can be arranged within the loop formed by the inner belt and the counter roll within the loop formed by the lower press belt. It is also possible to arrange the press roll within the loop formed by the lower press belt and the counter roll within the loop formed by the inner belt.
  • the press nip can be designed as a separate press nip, that is to say as an individually standing press nip. This results in a simple construction of the machine.
  • the press roll can be designed as a shoe roll to form an extended press nip.
  • higher line forces can be driven in the press nip.
  • the extended press nip of this shoe press at the beginning of the press device, i.e. directly after the forming area, enables gentle dewatering without damaging and crushing the fibrous web.
  • a higher dry content of the fibrous web can be achieved than is the case with a belt press, for example.
  • the counter roll can be designed as a suction roll. This allows the drainage, in particular the direction of drainage, to be influenced.
  • a steam blower box can be assigned to the fibrous web before the press nip to apply steam to the fibrous web.
  • a suction device is arranged upstream of the press nip, viewed in the machine running direction, within the loop formed by the inner band.
  • a blower hood can be assigned to the suction device for direct application of steam and / or hot dry air and / or hot moist air to the fibrous web.
  • a suction deflecting roller which is partially wrapped around the inner belt is arranged within the loop formed by the inner belt and between the press nip and the transfer roller.
  • the suction deflection roller can be subjected to negative pressure.
  • the web guide can thereby be stabilized and the dry content for certain types of fibrous web in front of the drying cylinder can be increased.
  • This arrangement is particularly advantageous when the transfer roller, in accordance with the invention, is designed as a shoe press roller. As a result, the fiber web is reliably transferred to the drying cylinder even when the dry content is high.
  • the suction deflecting roller can be partially wrapped by a permeable press belt in direct contact with the fibrous web.
  • the press belt can have an increased belt tension of, for example, more than 20 kN / m, preferably more than 30 kN / m.
  • a hood can be provided within the loop formed by the press belt and in the area of the wrap for indirectly applying steam and / or hot dry air and / or hot moist air to the fibrous web his.
  • the dry content of the fibrous web can be increased further for certain types of fibrous web before it is transferred to the drying cylinder.
  • the object is also achieved by a method for producing a fibrous web, in particular a tissue web, according to claim 13.
  • the lower press belt is preferably designed as a water-absorbing press belt, in particular as a press felt.
  • FIG. 1 shows a first embodiment of a machine 1 according to the invention in a simplified, schematic representation.
  • the machine 1 for producing a fibrous web 2, in this example a tissue web 2 comprises a forming area with a forming roller 5 and an inner belt 4 which at least partially wraps around this together with an outer belt 3.
  • a headbox 6 brings a belt between these belts 3, 4 Fiber suspension. This is mainly dewatered in the common looping area of the belts 3, 4 in the area of the forming roller 5 to form the tissue web 2, and on the inner band 4 lying to and guided by a directly following pressing device 7.
  • the press device 7 comprises a press roll 8 arranged at the top and a counter roll 9 arranged below which, in cooperation, form a press nip 24 for further dewatering of the tissue web 2.
  • the counter roll 9 and the press roll 8 can also be arranged upside down.
  • the counter roller 9 is designed as a suction roller with an applied vacuum.
  • This press nip 24 of the press device 7 is the first press nip 24 after the forming area.
  • a suction device 21 in this case a suction box 21, which is acted upon by vacuum is arranged upstream of the loop formed by the inner band 4.
  • a suction hood 21 is assigned to a blow hood 20 for direct application of steam and / or hot dry air and / or hot humid air to the tissue web 2.
  • the lower press belt 11 is designed as a water-absorbing press felt. After further dewatering of the tissue web 2 in the pressing device 7, the tissue web 2 is guided lying on the inner belt around a transfer roller 13, which is designed as a shoe roller.
  • a drying cylinder 14 which in this case is designed as a Yankee drying cylinder 14 , a transfer nip 12 in which the tissue web 2 is transferred from the inner belt 4 to the heated surface of the Yankee drying cylinder 14 and is further thermally dried.
  • the tissue web 2 is exposed to hot air and / or superheated steam via a drying hood 15 arranged in the region of the Yankee drying cylinder 14.
  • the tissue web 2 is then creped on a scraper 16 and removed from the surface of the Yankee drying cylinder and is led directly or indirectly to a roll-up station, not shown.
  • the tissue web 2 is thus guided by a single belt 4 from the forming area to the Yankee drying cylinder 14.
  • the inner band 4 is permeable, that is called permeable to air and water, and it has a structure for structuring the tissue web 2 at least on the side touching the tissue web 2. This structuring of the tissue web 2 causes a high specific volume, which is also referred to as bulk.
  • the inner, structured band 4 is a woven band in this example. It can also be designed as a permeable membrane or film structured at least on the tissue web side. The compressibility of the inner, structured belt is less than that of the lower press belt. As a result, the structure of the tissue web 2 is well protected and not crushed when it passes through the press nip 24.
  • the machine 1 enables two-sided dewatering of the tissue web 2 in the press nip 24, the squeezed water being partially absorbed by the inner belt 4 and mainly by the lower press belt 11.
  • the lower press belt 11, which is in contact with the tissue web 2 is optimized with regard to the quality, for example the specific volume, the tissue web 2 produced and with regard to the dewatering capacity.
  • the transfer roller 13 is designed as a shoe press roller to form an extended transfer nip 12 together with the Yankee drying cylinder 14.
  • the machine 1 is very compact in terms of overall height.
  • the length of the lower press belt 11 is short.
  • the felt guide of the lower press belt 11 is arranged exclusively above the machine base 23. This eliminates the requirement for the presence of a cellar, which is required in known machines for the production of tissue webs with a high bulk.
  • This machine can therefore also be installed in existing machine halls without a basement for the production of high-quality tissue webs 2 with a high specific volume, for example kitchen towels.
  • FIG. 2 shows a second embodiment of a machine 1 according to the invention in a simplified, schematic representation. It differs from the embodiment Figure 1 by an inside of the loop formed by the inner band 4 and between the press nip 24 and the transfer roller 13 and from the inner Volume 4 partially wrapped suction deflecting roller 17.
  • the suction deflecting roller 17 can be subjected to negative pressure. As a result, the web guidance can be stabilized and the dry content for certain types of tissue web in front of the drying cylinder 14 can be increased.
  • This arrangement has a particularly advantageous effect together with a transfer roller 13, which is designed according to the invention as a shoe press roller.
  • the Figure 3 shows a third embodiment of a machine 1 according to the invention in a simplified, schematic representation. It differs from the embodiment Figure 2 , characterized in that the suction deflecting roller 17 is partially wrapped in a permeable press belt 18 and is in direct contact with the tissue web 2.
  • the press belt exerts pressure on the tissue web to increase the dry content.
  • the press belt 18 has an increased belt tension of more than 20 kN / m, preferably more than 30 kN / m. As a result, the dry content of the tissue web 2 can be increased for certain types of tissue web before being transferred to the drying cylinder 14.
  • a hood is provided within the loop formed by the press belt 18 and in the area of the wrap for indirectly applying steam and / or hot dry air and / or hot moist air to the fibrous web.

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  • Paper (AREA)
EP19185150.0A 2018-09-17 2019-07-09 Machine et procédé de fabrication d'une bande fibreuse Withdrawn EP3623525A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018122632.2A DE102018122632A1 (de) 2018-09-17 2018-09-17 Maschine und Verfahren zur Herstellung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
EP3623525A1 true EP3623525A1 (fr) 2020-03-18

Family

ID=67220701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19185150.0A Withdrawn EP3623525A1 (fr) 2018-09-17 2019-07-09 Machine et procédé de fabrication d'une bande fibreuse

Country Status (4)

Country Link
US (1) US20200087857A1 (fr)
EP (1) EP3623525A1 (fr)
CN (1) CN110904716A (fr)
DE (1) DE102018122632A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023283666A1 (fr) * 2021-07-15 2023-01-19 Berndorf Band Gmbh Dispositif de presse doté d'un rouleau de presse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2589786B (en) * 2018-06-27 2022-11-30 Kimberly Clark Co Through-air drying apparatus and methods of manufacture

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6547924B2 (en) 1998-03-20 2003-04-15 Metso Paper Karlstad Ab Paper machine for and method of manufacturing textured soft paper
WO2005116332A1 (fr) * 2004-05-26 2005-12-08 Metso Paper Karlstad Ab Machine a papier et procede de fabrication de papier
WO2009067079A1 (fr) * 2007-11-20 2009-05-28 Metso Paper Karlstad Ab Courroie de structure, section de presse et machine de fabrication de papier mince pour fabriquer une bande de papier mince crêpé très bouffant, et procédé associé
EP2085515A2 (fr) * 2008-02-04 2009-08-05 Voith Patent GmbH Dispositif de drainage de bandes de papier mouchoir
EP2090691A1 (fr) * 2008-02-01 2009-08-19 Voith Patent GmbH Dispositif de fabrication de bandes de tissu
EP2264243A1 (fr) * 2009-05-19 2010-12-22 Andritz AG Procédé et dispositif de traitement d'une bande de matière fibreuse dans une unité de presse à longue ligne de contact
DE102010039456A1 (de) * 2010-08-18 2012-02-23 Voith Patent Gmbh Vorrichtung zur Herstellung einer Materialbahn
DE102011007568A1 (de) * 2011-04-18 2012-10-18 Voith Patent Gmbh Vorrichtung und Verfahren zur Herstellung einer Materialbahn
EP2796617A1 (fr) 2013-04-22 2014-10-29 GapCon GmbH Application de presse à chaussure pour la fabrication de grades de tissu
US20180073195A1 (en) * 2016-09-12 2018-03-15 Structured I, Llc Former of water laid asset that utilizes a structured fabric as the outer wire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE531891C2 (sv) * 2007-11-20 2009-09-01 Metso Paper Karlstad Ab Struktureringsbeklädnad och förfarande för framställning av en tissuepappersbana

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6547924B2 (en) 1998-03-20 2003-04-15 Metso Paper Karlstad Ab Paper machine for and method of manufacturing textured soft paper
WO2005116332A1 (fr) * 2004-05-26 2005-12-08 Metso Paper Karlstad Ab Machine a papier et procede de fabrication de papier
WO2009067079A1 (fr) * 2007-11-20 2009-05-28 Metso Paper Karlstad Ab Courroie de structure, section de presse et machine de fabrication de papier mince pour fabriquer une bande de papier mince crêpé très bouffant, et procédé associé
EP2090691A1 (fr) * 2008-02-01 2009-08-19 Voith Patent GmbH Dispositif de fabrication de bandes de tissu
EP2085515A2 (fr) * 2008-02-04 2009-08-05 Voith Patent GmbH Dispositif de drainage de bandes de papier mouchoir
EP2264243A1 (fr) * 2009-05-19 2010-12-22 Andritz AG Procédé et dispositif de traitement d'une bande de matière fibreuse dans une unité de presse à longue ligne de contact
DE102010039456A1 (de) * 2010-08-18 2012-02-23 Voith Patent Gmbh Vorrichtung zur Herstellung einer Materialbahn
DE102011007568A1 (de) * 2011-04-18 2012-10-18 Voith Patent Gmbh Vorrichtung und Verfahren zur Herstellung einer Materialbahn
EP2796617A1 (fr) 2013-04-22 2014-10-29 GapCon GmbH Application de presse à chaussure pour la fabrication de grades de tissu
US20180073195A1 (en) * 2016-09-12 2018-03-15 Structured I, Llc Former of water laid asset that utilizes a structured fabric as the outer wire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023283666A1 (fr) * 2021-07-15 2023-01-19 Berndorf Band Gmbh Dispositif de presse doté d'un rouleau de presse

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DE102018122632A1 (de) 2020-03-19
US20200087857A1 (en) 2020-03-19
CN110904716A (zh) 2020-03-24

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