EP0826818A3 - Process and apparatus for adjusting the consistency and fibre orientation profile in a headbox - Google Patents

Process and apparatus for adjusting the consistency and fibre orientation profile in a headbox Download PDF

Info

Publication number
EP0826818A3
EP0826818A3 EP97111794A EP97111794A EP0826818A3 EP 0826818 A3 EP0826818 A3 EP 0826818A3 EP 97111794 A EP97111794 A EP 97111794A EP 97111794 A EP97111794 A EP 97111794A EP 0826818 A3 EP0826818 A3 EP 0826818A3
Authority
EP
European Patent Office
Prior art keywords
turbulence insert
suspension
flow
supply lines
headbox
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Withdrawn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
EP97111794A
Other languages
German (de)
French (fr)
Other versions
EP0826818A2 (en
Inventor
Ulrich Begemann
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 Sulzer Papiermaschinen 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 Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0826818A2 publication Critical patent/EP0826818A2/en
Publication of EP0826818A3 publication Critical patent/EP0826818A3/en
Withdrawn legal-status Critical Current

Links

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
    • D21F1/02—Head boxes of Fourdrinier machines
    • 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
    • D21F1/08—Regulating consistency

Landscapes

  • Paper (AREA)

Abstract

Die Erfindung betrifft einen Stoffauflauf für eine Papiermaschine mit
einem Turbulenzeinsatz;
einem Verteilrohr, das sich ungeteilt über die gesamte Maschinenbreite erstreckt zur Zufuhr eines Suspensionsstromes in den Turbulenzeinsatz;
einer Düse mit einem Austrittsspalt;
einer Vielzahl von Zufuhrleitungen für einen Regelstrom.The invention relates to a headbox for a paper machine
a turbulence insert;
a distribution pipe which extends undivided over the entire width of the machine for supplying a suspension flow into the turbulence insert;
a nozzle with an exit gap;
a variety of supply lines for a control current.

Die Erfindung ist dadurch gekennzeichnet, daß
die Vielzahl von Zufuhrleitungen in dem Anschlußbereich des Verteilrohres, in dem der Suspensionsstrom im wesentlichen eine Strömungskomponente in Richtung des Turbulenzeinsatzes aufweist, an den Turbulenzeinsatz unmittelbar vor dessen einströmseitigem Ende unter einem Winkel α zwischen 5° und 170° zur Richtung des Suspensionsstromes im Turbulenzeinsatz angeordnet sind, so daß
mittels der über die Zufuhrleitungen eingespeisten Regelströme die Stoffdichte des Suspensionsstromes in den Bereich der Einspeisestelle auf einen vorbestimmten Wert eingestellt werden kann, wobei der Volumenstrom des Suspensionsstromes in diesem Bereich konstant gehalten wird.

Figure 00000001
The invention is characterized in that
the plurality of supply lines in the connection area of the distribution pipe, in which the suspension flow essentially has a flow component in the direction of the turbulence insert, are arranged on the turbulence insert immediately before its inlet end at an angle α between 5 ° and 170 ° to the direction of the suspension flow in the turbulence insert , so that
by means of the control streams fed in via the supply lines, the material density of the suspension stream in the area of the feed point can be set to a predetermined value, the volume flow of the suspension stream being kept constant in this area.
Figure 00000001
EP97111794A 1996-08-30 1997-07-11 Process and apparatus for adjusting the consistency and fibre orientation profile in a headbox Withdrawn EP0826818A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19634993 1996-08-30
DE19634993A DE19634993A1 (en) 1996-08-30 1996-08-30 Method and device for adjusting the stock density and fiber orientation profile in a headbox

Publications (2)

Publication Number Publication Date
EP0826818A2 EP0826818A2 (en) 1998-03-04
EP0826818A3 true EP0826818A3 (en) 1998-04-01

Family

ID=7804064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111794A Withdrawn EP0826818A3 (en) 1996-08-30 1997-07-11 Process and apparatus for adjusting the consistency and fibre orientation profile in a headbox

Country Status (4)

Country Link
US (1) US6136152A (en)
EP (1) EP0826818A3 (en)
CN (1) CN1175644A (en)
DE (1) DE19634993A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19908898A1 (en) 1999-03-02 2000-09-07 Voith Sulzer Papiertech Patent Process for metering a fluid medium into a suspension stream of a headbox and headbox
FI105407B (en) * 1999-05-27 2000-08-15 Valmet Corp Inlet box in a papermaking machine or cardboard making machine
EP1556544A2 (en) * 2002-11-01 2005-07-27 International Paper Company Method of making a stratified paper
AU2005326567B2 (en) * 2005-02-03 2010-12-09 Pmt Italia S.P.A. Apparatus and method for controlling the consistency of a flow of stock solution in a papermaking machine
CN102154914B (en) * 2011-02-24 2013-03-20 钟洲 Method for preparing aramid paper and aramid paper prepared by method
EP3088604B1 (en) * 2015-04-28 2020-03-25 Valmet Technologies Oy Method and system for the optimization of properties of a multilayer fiber web in fiber web manufacture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002558A (en) * 1957-12-21 1961-10-03 Voith Gmbh J M Flow distributor for fiber material for use in connection with paper making machines
US3328236A (en) * 1964-06-22 1967-06-27 Black Clawson Co Bunched tube approach to a headbox of a papermaking machine
DE4323263A1 (en) * 1993-07-12 1994-01-13 Voith Gmbh J M Stock inlet for paper-making machine - has flow-controlled jet feeds across main flow channel section with main flows and turbulence zone, allowing cross=sectional adjustment, etc.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4469556A (en) * 1982-09-29 1984-09-04 Beloit Corporation Flow distributor
DE3741603A1 (en) * 1987-12-09 1989-06-22 Voith Gmbh J M FABRIC DRAIN FOR A PAPER MACHINE OR THE LIKE.
US5196091A (en) * 1991-10-29 1993-03-23 Beloit Technologies, Inc. Headbox apparatus with stock dilution conduits for basis weight control
DE4140657C2 (en) * 1991-12-10 1994-07-14 Voith Gmbh J M Headbox
DE4416909C2 (en) * 1994-05-13 1997-12-11 Voith Sulzer Papiermasch Gmbh Headbox for a paper machine
DE4437180C2 (en) * 1994-10-18 1997-03-20 Voith Sulzer Papiermasch Gmbh Process for producing a headbox and intermediate part of a headbox of a paper or board machine
US5626722A (en) * 1995-06-01 1997-05-06 Valmet Corporation Headbox of a paper/board machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002558A (en) * 1957-12-21 1961-10-03 Voith Gmbh J M Flow distributor for fiber material for use in connection with paper making machines
US3328236A (en) * 1964-06-22 1967-06-27 Black Clawson Co Bunched tube approach to a headbox of a papermaking machine
DE4323263A1 (en) * 1993-07-12 1994-01-13 Voith Gmbh J M Stock inlet for paper-making machine - has flow-controlled jet feeds across main flow channel section with main flows and turbulence zone, allowing cross=sectional adjustment, etc.

Also Published As

Publication number Publication date
US6136152A (en) 2000-10-24
EP0826818A2 (en) 1998-03-04
DE19634993A1 (en) 1998-03-05
CN1175644A (en) 1998-03-11

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