EP1323862A1 - Procédé pour régler le profil transversal du rétrécissement dans une machine à papier - Google Patents

Procédé pour régler le profil transversal du rétrécissement dans une machine à papier Download PDF

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Publication number
EP1323862A1
EP1323862A1 EP03001610A EP03001610A EP1323862A1 EP 1323862 A1 EP1323862 A1 EP 1323862A1 EP 03001610 A EP03001610 A EP 03001610A EP 03001610 A EP03001610 A EP 03001610A EP 1323862 A1 EP1323862 A1 EP 1323862A1
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EP
European Patent Office
Prior art keywords
shrinkage
profile
fibers
lateral
sections
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.)
Granted
Application number
EP03001610A
Other languages
German (de)
English (en)
Other versions
EP1323862B1 (fr
Inventor
Udo Grossmann
Günter Dr. Halmschlager
Erich Brunnauer
Alexander Wassermann
Eduard Bachler
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 Paper 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 Paper Patent GmbH filed Critical Voith Paper Patent GmbH
Publication of EP1323862A1 publication Critical patent/EP1323862A1/fr
Application granted granted Critical
Publication of EP1323862B1 publication Critical patent/EP1323862B1/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
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • 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
    • D21F1/08—Regulating consistency
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0027—Paper-making control systems controlling the forming section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/09—Uses for paper making sludge
    • Y10S162/10—Computer control of paper making variables
    • Y10S162/11—Wet end paper making variables

Definitions

  • the invention relates to a method for controlling the shrinkage cross profile a running web of paper or cardboard according to the preamble of Claim 1.
  • the inventive method with both a headbox with dilution water control as well as with a headbox can be carried out with an adjustable aperture.
  • a dilution water controlled Headboxes are the actuators for controlling the basis weight cross-section mostly from valves for controlling the dilution flows.
  • at aperture-controlled headboxes usually provide the adjustment spindles of the Headbox cover these actuators for controlling the basis weight cross-section represents.
  • control method shown can decouple between basis weight cross profile in the profile control algorithm and shrink cross profile are performed so that the mutual Influencing the regulations of the cross profiles at least in the first Order be avoided.
  • the smoothness and / or the strength of the material web produced are particularly suitable made of paper or cardboard. However, others can do the measurement accessible property sizes of the material web are used.
  • FIG. 1 shows a typical shrinkage cross profile 1 of a material web made of paper or cardboard.
  • the edge areas B 1 and B 3 are characterized by high shrinkage gradients and high absolute values of the shrinkage ⁇ 2 .
  • the shrinkage is at a relatively low level and is almost straight and horizontal.
  • This course of shrinkage is typical for many types of paper, but there are also many other forms of cross-section shrinkage. These depend on many parameters, such as the type of paper and the design of the process steps in paper production - for example the drying process.
  • cross-sectional shrinkage profiles with an asymmetrical profile or with a non-linear profile can also occur in the central region B 2 of the material web.
  • FIG. 2 shows a cross-sectional shrinkage profile 1 after the proportion of fibers with a lower tendency to shrink was increased in the edge regions B 1 and B 3 of the material web - or - the proportion of fibers with a higher tendency to shrink was reduced, while the composition of the stock suspension in the central region B 2 of the material web has remained unchanged.
  • FIG. 3 shows an exemplary regulation of the shrinkage cross profile a paper machine.
  • the manufacturing process is very schematic on the left the material web shown, which in the course of the manufacturing process Experiences shrinkage and is ultimately led to the trolley.
  • the headbox 2 here is an example with a dilution water control known per se, for example according to German published patent application DE 40 19 593 A1, equipped to adjust the atro basis weight cross profile.
  • This shows a machine-wide scanner on the trolley, which atro / basis weight cross-section, feeds a profile control algorithm and the actuators, here N valves 6 of the dilution water supply with N sections, actuated.
  • this regulation is expanded by the actual profile of the shrinkage (Shrinkage cross profile) via a known online mapping is calculated and compared with a target profile for the shrinkage.
  • the Profile control algorithm determines the necessary corrections and influences the actuators for influencing shrinkage via the actuator positioner, which here in the form of valves 6 in the M sections of the feed lines for the shrinkage-influencing liquid is realized.
  • the number of N sections of the dilution water control and the M sections the shrinkage control are the same in the present example, can but also turn out differently. In particular, it can be advantageous to To subdivide sections for shrinkage control in the edge area more finely than in middle area of the material web.
  • FIG of the shrinkage cross profile is shown by measuring a size that matches the Shrinkage correlated. For example, the Smoothness / surface roughness and / or the strength of the material web used become.
  • this measured profile can now directly and alone or used in conjunction with the calculated shrinkage profile. If both profiles are used for regulation, a corresponding one can be used Towards an optimization of the control mechanism become.
  • FIG. 4 shows, by way of example, a headbox according to the dilution water principle for the use of the method according to the invention, as described, for example, in the previously mentioned German patent application DE 40 19 593 A1.
  • the shrinkage-influencing suspension Q F is fed in front of the turbulence generator at several feed points 7, distributed over the headbox width.
  • This shrinkage-influencing suspension Q F contains fibers which differ in their shrinkage behavior from the fibers which are contained in the suspension Q H. For example, if the fibers in Q F have a lower tendency to shrink than those in Q H , the cross-sectional shrinkage profile 1 shown in FIG. 1 can be improved by increasing the sectional volume flow of Q F at the edges.
  • the feed points 7 for Q F can be distributed uniformly or unevenly - for example only at the edges - over the width of the headbox.
  • the geometry of the feed for Q F can preferably be designed such that the sectional total volume flow at the outlet of the nozzle remains constant despite the variation of Q F.
  • Such a design of a headbox is described in detail in German Offenlegungsschrift DE 42 11 291 A1.
  • Cross distribution pipes or central distributors can be used to distribute the suspensions over the headbox width.
  • FIG. 5 shows the initial area of a paper machine with a primary headbox 2, which applies stock suspension to a sieve 11.
  • the screen 11 is deflected via rollers 12 and the dewatering of the stock suspension takes place in a known manner via dewatering elements 13, consisting of suction boxes and dewatering strips.
  • a secondary headbox 2.1 is provided, by means of which the shrinkage-influencing stock suspension Q F can be applied in sections metered over the machine width to the already existing stock suspension layer.
  • FIG. 5a shows view A from FIG. 5, in which the secondary headbox 2.1 is shown.
  • the secondary headbox has a cross distributor 3.1, via which the shrinkage-influencing stock suspension Q F is fed machine-wide to the first chamber 8.1 of the headbox 2.1.
  • a plurality of valves 6 are interposed, which enables a metered supply of the shrinkage-influencing suspension Q F which is sectioned over the machine width.
  • a turbulence generator 9.1 and a subsequent nozzle 10.1 are shown in a known manner.
  • FIG. 6 shows in a spatial representation the beginning of a fourdrinier paper machine with a headbox 2, to which the high and low consistent stock suspension streams Q H and Q L are fed.
  • the headbox 2 distributes the stock suspension evenly over the screen 11.
  • the screen 11 is deflected over several rollers 12 and then on the headbox 2 dewatering elements 13 are provided which dewater the fibrous layer lying on the screen 11.
  • a spray pipe 17 running across the machine width.
  • the spray tube 17 has a plurality of spray nozzles 15 and 16 which, for example, are arranged exclusively at the edges of the material web and thus only spray the edges of the material web with the suspension Q F which influences shrinkage.
  • the use of fibers or fiber mixtures, the starting material of which is not wood, such as plastic fibers, is also within the scope of the disclosure.

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  • Paper (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP03001610A 1998-09-24 1999-07-05 Procédé pour régler le profil transversal du rétrécissement dans une machine à papier Expired - Lifetime EP1323862B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843729A DE19843729A1 (de) 1998-09-24 1998-09-24 Verfahren und Vorrichtung zur Verbesserung des Schrumpfungs-Querprofils
DE19843729 1998-09-24
EP99112905A EP0995834B1 (fr) 1998-09-24 1999-07-05 Procédé et dispositif pour améliorer le profil transversal du rétrécissement dans une machine à papier

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99112905A Division EP0995834B1 (fr) 1998-09-24 1999-07-05 Procédé et dispositif pour améliorer le profil transversal du rétrécissement dans une machine à papier

Publications (2)

Publication Number Publication Date
EP1323862A1 true EP1323862A1 (fr) 2003-07-02
EP1323862B1 EP1323862B1 (fr) 2006-07-26

Family

ID=7882031

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03001610A Expired - Lifetime EP1323862B1 (fr) 1998-09-24 1999-07-05 Procédé pour régler le profil transversal du rétrécissement dans une machine à papier
EP99112905A Expired - Lifetime EP0995834B1 (fr) 1998-09-24 1999-07-05 Procédé et dispositif pour améliorer le profil transversal du rétrécissement dans une machine à papier

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99112905A Expired - Lifetime EP0995834B1 (fr) 1998-09-24 1999-07-05 Procédé et dispositif pour améliorer le profil transversal du rétrécissement dans une machine à papier

Country Status (6)

Country Link
US (1) US6303001B1 (fr)
EP (2) EP1323862B1 (fr)
JP (1) JP2000096475A (fr)
AT (2) ATE254208T1 (fr)
CA (1) CA2283425C (fr)
DE (3) DE19843729A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843727A1 (de) 1998-09-24 2000-03-30 Voith Sulzer Papiertech Patent Verfahren und Stoffauflaufsystem zur Verbesserung des Konsistenzquerprofils einer Faserbahn
FI107964B (fi) * 1999-12-31 2001-10-31 Metso Paper Automation Oy Menetelmä ja laitteisto paperikoneen toimilaitteen kohdistuksen identifioimiseksi
US6564117B1 (en) * 2000-06-13 2003-05-13 Abb Automation Inc. Automated optimization of cross machine direction profile control performance for sheet making processes
DE10117236A1 (de) * 2001-04-06 2002-10-17 Voith Paper Patent Gmbh Verfahren und Vorrichtung zur Bildung einer Faserstoffbahn
DE10351295A1 (de) * 2003-10-31 2005-06-02 Voith Paper Patent Gmbh Verfahren zum Erzeugen einer Faserstoffbahn und Vorrichtung zur Durchfühung des Verfahrens
DE102005036075A1 (de) * 2005-08-01 2007-02-15 Voith Patent Gmbh Verfahren zur Herstellung von Tissuepapier
CN100400745C (zh) * 2006-07-07 2008-07-09 华南理工大学 一种添加稀释水粗调与微调纸张横幅定量的装置
FI121888B (fi) 2008-08-12 2011-05-31 Metso Paper Inc Menetelmä kuiturainan ominaisuuksien optimoimiseksi
US20100122786A1 (en) * 2008-11-20 2010-05-20 Tommy Jacobson Application of retention, drainage, and formation (rdf) chemical aids after a headbox of a papermaking process
FI122113B (fi) 2010-02-03 2011-08-31 Metso Paper Inc Menetelmä ja perälaatikko kuiturainan poikkisuuntaisen ominaisuusprofiilin parantamiseksi
DE102010030352A1 (de) * 2010-06-22 2011-12-22 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
DE102010038891A1 (de) 2010-08-04 2012-02-09 Voith Patent Gmbh Stoffauflauf für eine Maschine zur Herstellung einer Faserstoffbahn
US8871059B2 (en) * 2012-02-16 2014-10-28 International Paper Company Methods and apparatus for forming fluff pulp sheets
CN104480769B (zh) * 2014-11-04 2016-08-24 陕西科技大学 一种稀释水水力式流浆箱稀释水阀控制装置及控制方法
JP7035325B2 (ja) * 2017-03-22 2022-03-15 セイコーエプソン株式会社 シート製造装置、シート、及び、シート製造方法
US11441268B2 (en) 2018-01-05 2022-09-13 International Paper Company Paper products having increased bending stiffness and cross-direction strength and methods for making the same
DE102021105475A1 (de) 2021-03-08 2022-04-21 Voith Patent Gmbh Einstellbare Querverteilung für einen Stoffauflauf
DE102022107202A1 (de) 2022-03-28 2023-09-28 Voith Patent Gmbh Mehrlagenfaserstoffbahn

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE4019593A1 (de) * 1990-06-20 1992-01-09 Voith Gmbh J M Stoffauflauf fuer papiermaschinen
WO1996019615A1 (fr) * 1994-12-19 1996-06-27 Siemens Aktiengesellschaft Procede et dispositif permettant de detecter et de modifier dans le sens transversal certaines proprietes determinees de bandes de papier
DE19542448A1 (de) * 1995-11-14 1997-05-15 Voith Sulzer Papiermasch Gmbh Verfahren und Einrichtung zur Ermittlung der Auswirkung der Verstellung von Stellgliedern
US5658432A (en) * 1995-08-24 1997-08-19 Measurex Devron Inc. Apparatus and method of determining sheet shrinkage or expansion characteristics

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JPS4811408B1 (fr) * 1969-03-29 1973-04-13
SE440518B (sv) * 1984-02-09 1985-08-05 Svenska Traeforskningsinst Forfarande och anordning for att i en pappersmaskins torkparti forhindra tverkrympning av pappersbanan
DE3715551A1 (de) 1987-05-09 1988-12-01 Voith Gmbh J M Verfahren zum verringern des flatterns der bahnraender einer papierbahn sowie papiermaschine zum durchfuehren des verfahrens
DE3741603A1 (de) 1987-12-09 1989-06-22 Voith Gmbh J M Stoffauflauf fuer eine papiermaschine od.dgl.
DE4008282A1 (de) * 1990-03-15 1991-09-19 Voith Gmbh J M Massnahmen zur erfassung der schrumpfung oder dehnung von warenbahnen
US5707495A (en) 1990-06-20 1998-01-13 J.M. Voith Gmbh Headbox for papermaking machine with more uniform flow
JPH06280199A (ja) * 1992-01-17 1994-10-04 Nippon Paper Ind Co Ltd 剥離紙用基材
DE4211291C3 (de) 1992-04-03 2001-06-07 Voith Gmbh J M Mischeinrichtung und Verfahren zum Mischen von zwei Flüssigkeiten bei konstantem Gemischvolumenstrom zur Versorgung des Stoffauflaufs einer Papiermaschine
DE4239845C2 (de) 1992-11-05 1998-12-03 Voith Gmbh J M Verfahren zur Messung der Auswirkung von Verstellungen am Stoffauflauf und zur Korrektur des Flächengewichts- und Faserorientierungs-Querprofils
DE4237309A1 (fr) * 1992-11-05 1993-04-08 Voith Gmbh J M
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DE4422907C2 (de) 1994-06-30 1997-03-06 Voith Gmbh J M Sektionale Stoffzuführung des Stoffauflaufs einer Papiermaschine
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JPH11350369A (ja) * 1998-06-03 1999-12-21 Ishikawajima Harima Heavy Ind Co Ltd 抄紙原料への薬剤投入装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4019593A1 (de) * 1990-06-20 1992-01-09 Voith Gmbh J M Stoffauflauf fuer papiermaschinen
WO1996019615A1 (fr) * 1994-12-19 1996-06-27 Siemens Aktiengesellschaft Procede et dispositif permettant de detecter et de modifier dans le sens transversal certaines proprietes determinees de bandes de papier
US5658432A (en) * 1995-08-24 1997-08-19 Measurex Devron Inc. Apparatus and method of determining sheet shrinkage or expansion characteristics
DE19542448A1 (de) * 1995-11-14 1997-05-15 Voith Sulzer Papiermasch Gmbh Verfahren und Einrichtung zur Ermittlung der Auswirkung der Verstellung von Stellgliedern

Also Published As

Publication number Publication date
EP0995834A1 (fr) 2000-04-26
CA2283425A1 (fr) 2000-03-24
ATE254208T1 (de) 2003-11-15
DE59913719D1 (de) 2006-09-07
ATE334253T1 (de) 2006-08-15
DE59907702D1 (de) 2003-12-18
US6303001B1 (en) 2001-10-16
JP2000096475A (ja) 2000-04-04
CA2283425C (fr) 2008-11-18
EP0995834B1 (fr) 2003-11-12
DE19843729A1 (de) 2000-03-30
EP1323862B1 (fr) 2006-07-26

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