EP0631011A1 - Caisse de tête pour une machine à papier - Google Patents

Caisse de tête pour une machine à papier Download PDF

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Publication number
EP0631011A1
EP0631011A1 EP94108549A EP94108549A EP0631011A1 EP 0631011 A1 EP0631011 A1 EP 0631011A1 EP 94108549 A EP94108549 A EP 94108549A EP 94108549 A EP94108549 A EP 94108549A EP 0631011 A1 EP0631011 A1 EP 0631011A1
Authority
EP
European Patent Office
Prior art keywords
module
forming unit
headbox
distributor
volume flow
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
EP94108549A
Other languages
German (de)
English (en)
Other versions
EP0631011B1 (fr
Inventor
Hans-Joachim Dr. Schultz
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0631011A1 publication Critical patent/EP0631011A1/fr
Application granted granted Critical
Publication of EP0631011B1 publication Critical patent/EP0631011B1/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
    • D21F1/026—Details of the turbulence section
    • 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

Definitions

  • the invention relates to a headbox for the production of a paper machine including the distribution system supplying the stock suspension.
  • Such a headbox should set the stock density and fiber orientation profile of the paper stock suspension at the latest before the outlet gap in such a way that the basis weight and fiber orientation cross profile of the paper web corresponds to the desired requirements over the entire width, that is to say is generally constant.
  • disruptive factors include, for example, temperature fluctuations, pressure fluctuations, manufacturing tolerances or design-related irregularities in the headbox, which lead to problematic asymmetries in the paper.
  • a headbox which has a modular structure, the headbox consisting of a central distribution system and connected, individual modular forming units which distribute the stock suspension flatly.
  • Disadvantages of the headbox shown are, on the one hand, insufficient symmetry with regard to the suspension guidance and, on the other hand, the lack of precautions for the sectioned influencing of the suspension properties.
  • the object of the invention is to present a headbox which eliminates the disadvantages of the prior art and at the same time is structurally designed such that that relatively large headboxes can also be produced with small-scale processing machines.
  • each individual fraction of stock suspensions is treated as equally as possible with respect to the individual positions of the machine width, i.e. that the absolute symmetry also with respect to the "preexistence" of the stock suspension before it leaves the headbox makes a significant contribution to the uniformity of the paper across the machine width.
  • the possibility must also be given to carry out section-specific mixing of material suspensions with different properties, which of course also includes an influence on the material flow per section.
  • Figure 1 shows the forming unit of the headbox system according to the invention in a perspective view.
  • the illustration shows four rows of modules that are machine-wide in the running direction and structure of a modular forming unit.
  • Each row consists of a set of individual modules, which can be combined with one another in a meaningful manner, whereby of course - not shown in the figure - stacked combinations are also possible, which corresponds to a 3-dimensional modularity.
  • a connection piece system 1 is first seen, to which the transition piece 2 is connected, followed by a formation element 3, again followed by rectifiers 4 with the nozzle 5 connected to them.
  • Figure 2 shows different combinations of structural elements in the forming unit.
  • a connector can be seen under position 1, followed by position 2, a diffuser, followed by a formation element 3, followed by a rectifier 4, which in this case is also constructed as a partial diffuser, followed by a nozzle 5 with a straight upper and lower lip.
  • a rectifier 4 which in this case is also constructed as a partial diffuser, followed by a nozzle 5 with a straight upper and lower lip.
  • two different connection systems can be seen under 1 and 2, one with a 90 ° curvature or with a 45 ° connection, followed by a directly following, differently designed formation element, the also differently designed rectifier 4 and a subsequent one on both sides S -shaped material outlet nozzle 5.
  • Level C shows an extended extension 1 with a shortened intermediate piece 2, followed by an intermediate piece 3, which in the beginning consists of a pipe distribution grid with a subsequent formation element, then in part 4 a nozzle-like turbulence insert 4 with the Nozzle 5 connected thereto.
  • level D at position 3 there is alternatively shown a perforated roller insert which can be combined with any configuration of levels AC.
  • all elements of levels A-D at positions 1-5 can of course be combined in a meaningful way.
  • FIG. 3 shows a headbox system with the central distributor 1 according to the invention, which simultaneously functions as a damping element in the known sense.
  • the Material suspension is fed from the central distributor 1 to the connecting piece system of the forming unit 3 via flexible lines 2 attached to the central distributor.
  • the forming unit is constructed as described in FIGS. 1 and 2.
  • both central distributors deliver material suspensions of different qualities
  • the second central distributor is also connected to the connecting piece system via flexible lines either via a mixing valve, or an alternating connection of lines of the first and afterwards of the second central distributor is made in a mixing chamber.

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  • Paper (AREA)
EP19940108549 1993-06-03 1994-06-03 Caisse de tête pour une machine à papier Expired - Lifetime EP0631011B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934318430 DE4318430C2 (de) 1993-06-03 1993-06-03 Stoffauflaufsystem einer Papiermaschine
DE4318430 1993-06-03

Publications (2)

Publication Number Publication Date
EP0631011A1 true EP0631011A1 (fr) 1994-12-28
EP0631011B1 EP0631011B1 (fr) 2000-03-29

Family

ID=6489532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940108549 Expired - Lifetime EP0631011B1 (fr) 1993-06-03 1994-06-03 Caisse de tête pour une machine à papier

Country Status (2)

Country Link
EP (1) EP0631011B1 (fr)
DE (1) DE4318430C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708201A1 (fr) * 1994-09-20 1996-04-24 Voith Sulzer Papiermaschinen GmbH Caisse de tête d'une machine à papier
DE19845722A1 (de) * 1998-10-05 2000-04-06 Voith Sulzer Papiertech Patent Stoffauflauf
US6261418B1 (en) 1998-10-05 2001-07-17 Voith Sulzer Papiertechnik Patent Gmbh Headbox with flexible support plates
US7578906B2 (en) 2006-02-01 2009-08-25 Astenjohnson, Inc. Headbox and stock delivery system for a papermaking machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008105714A1 (fr) * 2007-03-01 2008-09-04 Metso Paper Karlstad Ab Élément structurel pour un élément fonctionnel d'une caisse d'arrivée dans une machine à papier, élément fonctionnel et caisse d'arrivée fabriqués à partir de celui-ci et procédés associés

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001318A1 (fr) * 1986-08-23 1988-02-25 J.M. Voith Gmbh Caisse de tete
DE3730775A1 (de) * 1986-09-19 1988-03-31 Valmet Oy Verfahren und vorrichtung im stoffauflauf einer papiermaschine und in dessen zulaufrohrsystem
WO1989004396A1 (fr) * 1987-11-04 1989-05-18 J.M. Voith Ag Procede pour la fabrication de materiaux en forme de bande au moyen de fibres ou d'autres particules en suspension gravitationnelle ou non dans un fluide
DE9205111U1 (fr) * 1992-04-03 1992-06-11 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4114668A1 (de) * 1991-05-06 1992-11-12 Schultz Hans Joachim Dr Ing Stoffauflauf fuer papiermaschinen, vorgeschaltete einrichtung um an einem oder mehreren stoffauflaeufen den dickstoff zur querprofilregelung einzustellen
DE4316054A1 (de) * 1993-05-13 1993-10-14 Voith Gmbh J M Stoffauflauf einer Papiermaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001318A1 (fr) * 1986-08-23 1988-02-25 J.M. Voith Gmbh Caisse de tete
DE3730775A1 (de) * 1986-09-19 1988-03-31 Valmet Oy Verfahren und vorrichtung im stoffauflauf einer papiermaschine und in dessen zulaufrohrsystem
WO1989004396A1 (fr) * 1987-11-04 1989-05-18 J.M. Voith Ag Procede pour la fabrication de materiaux en forme de bande au moyen de fibres ou d'autres particules en suspension gravitationnelle ou non dans un fluide
DE4114668A1 (de) * 1991-05-06 1992-11-12 Schultz Hans Joachim Dr Ing Stoffauflauf fuer papiermaschinen, vorgeschaltete einrichtung um an einem oder mehreren stoffauflaeufen den dickstoff zur querprofilregelung einzustellen
DE9205111U1 (fr) * 1992-04-03 1992-06-11 J.M. Voith Gmbh, 7920 Heidenheim, De
DE4316054A1 (de) * 1993-05-13 1993-10-14 Voith Gmbh J M Stoffauflauf einer Papiermaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0708201A1 (fr) * 1994-09-20 1996-04-24 Voith Sulzer Papiermaschinen GmbH Caisse de tête d'une machine à papier
US5741401A (en) * 1994-09-20 1998-04-21 Voith Sulzer Papiermaschinen Gmbh Headbox of a paper machine
DE19845722A1 (de) * 1998-10-05 2000-04-06 Voith Sulzer Papiertech Patent Stoffauflauf
US6248214B1 (en) 1998-10-05 2001-06-19 Voith Sulzer Papiertechnik Patent Gmbh Headbox
US6261418B1 (en) 1998-10-05 2001-07-17 Voith Sulzer Papiertechnik Patent Gmbh Headbox with flexible support plates
US7578906B2 (en) 2006-02-01 2009-08-25 Astenjohnson, Inc. Headbox and stock delivery system for a papermaking machine

Also Published As

Publication number Publication date
DE4318430C2 (de) 1997-03-27
EP0631011B1 (fr) 2000-03-29
DE4318430A1 (de) 1994-12-08

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