DE4239646A1 - Paper making machine stock inlet - has a diaphragm held at least at one side by elastic mountings to prevent hysteresis on adjustment - Google Patents

Paper making machine stock inlet - has a diaphragm held at least at one side by elastic mountings to prevent hysteresis on adjustment

Info

Publication number
DE4239646A1
DE4239646A1 DE19924239646 DE4239646A DE4239646A1 DE 4239646 A1 DE4239646 A1 DE 4239646A1 DE 19924239646 DE19924239646 DE 19924239646 DE 4239646 A DE4239646 A DE 4239646A DE 4239646 A1 DE4239646 A1 DE 4239646A1
Authority
DE
Germany
Prior art keywords
diaphragm
adjustment
stock inlet
making machine
paper making
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
DE19924239646
Other languages
German (de)
Other versions
DE4239646C2 (en
Inventor
Helmut Heinzmann
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to DE19924239646 priority Critical patent/DE4239646C2/en
Publication of DE4239646A1 publication Critical patent/DE4239646A1/en
Application granted granted Critical
Publication of DE4239646C2 publication Critical patent/DE4239646C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • D21F1/028—Details of the nozzle section

Landscapes

  • Paper (AREA)

Abstract

The stock inlet has a diaphragm held at least at one side by at least partially elastic mountings. USE/ADVANTAGE - The diaphragm at the suspension flow sets the paper weight profile and the lateral fibre orientation profile in the paper web. The fitting eliminates hysteresis at the upper lip diaphragm when the threaded spindles are advanced or retracted for setting.

Description

Die Erfindung betrifft einen Stoffauflauf zur Herstellung einer Papierbahn gemäß dem Oberbegriff von Anspruch 1.The invention relates to a headbox for manufacture a paper web according to the preamble of claim 1.

Ein solcher Stoffauflauf soll das Stoffdichte- und Faserorientierungsquerprofil der Papierstoffsuspension spätestens vor dem Auslaufspalt derart einstellen, daß das Flächengewichts- und Faserorientierungsquerprofil der Papierbahn über die gesamte Breite den gewünschten Anforderungen entspricht, das bedeutet in der Regel konstant ist.Such a headbox is said to be the density and Cross fiber orientation profile of the pulp suspension adjust at the latest before the outlet gap so that the Basis weight and fiber orientation cross profile of Paper web over the entire width the desired Usually meets requirements is constant.

Beim Betrieb einer Papiermaschine gibt es zahlreiche Störfaktoren, die den beiden genannten Anforderungen entgegenstehen. Zu diesen Störfaktoren gehören beispielsweise Temperaturschwankungen, Druckschwankungen und Fertigungstoleranzen aber auch Fehler in der Ausführung oder Einstellung der Papiermaschine für den dem Stoffauflauf folgenden Produktionsprozeß.There are numerous when operating a paper machine Disruptive factors that meet the two requirements mentioned oppose. These disruptive factors include for example temperature fluctuations, pressure fluctuations and manufacturing tolerances but also errors in execution or setting the paper machine for the Headbox following production process.

Es ist folgender Stand der Technik bekannt geworden:The following prior art has become known:

Aus DE-PS 29 42 966 oder DE-OS 35 35 849 ist bekannt, die Weite des Auslaufspaltes zu verändern, beispielsweise durch Gewindespindeln zum Verschwenken oder Verbiegen der Oberlippe.From DE-PS 29 42 966 or DE-OS 35 35 849 it is known that To change the width of the outlet gap, for example by Threaded spindles for swiveling or bending the Upper lip.

Ein Problem der bekannten Ausführungen liegt in der Einstellungshysterese der Blende der Oberlippe beim Vor- und Zurückstellen der Gewindespindeln.A problem with the known designs lies in Setting hysteresis of the aperture of the upper lip when and reset the threaded spindles.

Aufgabe der Erfindung ist es, eine Blende an der Düse des Stoffauflaufes derart darzustellen, daß der obengenannte Nachteil der Einstellungshysterese vermieden wird.The object of the invention is to provide an aperture on the nozzle of  To represent headbox such that the above Disadvantage of the setting hysteresis is avoided.

Die Aufgabe wird durch das kennzeichnende Merkmal des Anspruches 1 gelöst.The task is characterized by the characteristic of Claim 1 solved.

Die Erfindung ist anhand der Zeichnungen näher erläutert. Darin ist im übrigen folgendes dargestelltThe invention is explained in more detail with reference to the drawings. The following is also shown in it

Fig. 1 zeigt eine hysteresefreie Blendenlagerung mit einseitiger biegeweicher Lagerung. Fig. 1 shows a hysteresis-free aperture storage with one-sided flexible storage.

Fig. 2 zeigt eine hysteresefreie Blendenlagerung mit zweiseitiger biegeweicher Lagerung. Fig. 2 shows a hysteresis-free diaphragm mounting with double-sided flexible storage.

Fig. 1 zeigt den Auslaufbereich eines Stoffauflaufes im Querschnitt. Es ist untenliegend die Unterlippe 1 mit der gegenüberliegenden Oberlippe 2 dargestellt. Am Ende der Oberlippe 2 sind zwei biegeweiche Stege 7 angeordnet, auf denen die Blende 6 aufliegt. Die Blende 6 wird auf der Oberseite durch eine Anpreßplatte 3 und einen in einer Einbuchtung der Anpreßplatte 3 liegenden Anpreßschlauch 8 gehalten. Die Anpreßplatte 3 wiederum ist über einen Steg 9, der auf der Oberlippe 2 aufliegt, und einer Schraubverbindung 4 zwischen der Anpreßplatte 3 und der Oberlippe 2 gehalten. Die Einstellung der Blende erfolgt über bekannte Einstellelemente 5, die über die Breite der Maschine angeordnet sind und ein Vor- und Zurückfahren der Blende ermöglichen. Fig. 1 shows the outlet area of a headbox in cross section. The lower lip 1 with the opposite upper lip 2 is shown below. At the end of the upper lip 2 there are two flexible webs 7 on which the diaphragm 6 rests. The cover 6 is held on the top by a pressure plate 3 and a pressure hose 8 lying in an indentation of the pressure plate 3 . The pressure plate 3 in turn is held via a web 9 , which rests on the upper lip 2 , and a screw connection 4 between the pressure plate 3 and the upper lip 2 . The aperture is set using known adjusting elements 5 , which are arranged across the width of the machine and enable the aperture to be moved back and forth.

Fig. 2 zeigt den Auslaufbereich eines Stoffauflaufes entsprechend Fig. 1. Die Bezugszeichen sind entsprechend gewählt. Der Unterschied der beiden erfindungsgemäßen Ausführungen besteht darin, daß als biegeweiche Lagerung der Blende auf der Oberlippenseite ein separates elastisches Element 7.1 an der Oberlippe angebracht ist, das mit in diesem Fall zwei Zungen die Blende abstützt. Fig. 2 shows the outlet area of a headbox according to Fig. 1. The reference numerals are chosen accordingly. The difference between the two designs according to the invention is that a flexible elastic element 7.1 is attached to the upper lip as a flexible mounting of the screen on the upper lip side, which in this case supports the screen with two tongues.

Auf der gegenüberliegenden Seite ist zwischen Anpreßschlauch 8 und Blende 6 auf der Seite des Anpreßschlauches ein Flacheisen 10 dargestellt, welches den Anpreßdruck des Anpreßschlauches 8 an eine spiegelbildlich zur biegeweichen Lagerung 7.1 angebrachte biegeweiche Lagerung 7.2 an die Blende 6 weitergibt.On the opposite side, between the pressure hose 8 and the cover 6 on the side of the pressure hose, a flat iron 10 is shown, which passes the contact pressure of the pressure hose 8 to a flexible support 7.2 , which is attached in a mirror image of the flexible storage 7.1, to the cover 6 .

Claims (1)

Blende eines Stoffauflaufes einer, eine Faserbahn bildenden Maschine, insbesonders einer Papiermaschine, dadurch gekennzeichnet, daß die Blende mindestens auf einer Seite von mindestens teilweise elastischen Lagerelementen gehalten ist.Diaphragm of a headbox of a machine forming a fibrous web, in particular a paper machine, characterized in that the diaphragm is held on at least one side by at least partially elastic bearing elements.
DE19924239646 1992-11-26 1992-11-26 Headbox for the production of a paper web with a hysteresis-free aperture Expired - Fee Related DE4239646C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924239646 DE4239646C2 (en) 1992-11-26 1992-11-26 Headbox for the production of a paper web with a hysteresis-free aperture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924239646 DE4239646C2 (en) 1992-11-26 1992-11-26 Headbox for the production of a paper web with a hysteresis-free aperture

Publications (2)

Publication Number Publication Date
DE4239646A1 true DE4239646A1 (en) 1994-06-01
DE4239646C2 DE4239646C2 (en) 1995-04-06

Family

ID=6473630

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924239646 Expired - Fee Related DE4239646C2 (en) 1992-11-26 1992-11-26 Headbox for the production of a paper web with a hysteresis-free aperture

Country Status (1)

Country Link
DE (1) DE4239646C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713272U1 (en) * 1997-07-25 1997-11-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Headbox to form a fiber suspension layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028673A (en) * 1933-09-19 1936-01-21 American Voith Contact Co Inc Stock inlet control for paper making machines
DE2942966C2 (en) * 1979-10-24 1984-04-26 J.M. Voith Gmbh, 7920 Heidenheim Headbox nozzle
DE3535849A1 (en) * 1985-10-08 1987-04-09 Voith Gmbh J M Setting device for the lip of a papermachine hatbox

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2028673A (en) * 1933-09-19 1936-01-21 American Voith Contact Co Inc Stock inlet control for paper making machines
DE2942966C2 (en) * 1979-10-24 1984-04-26 J.M. Voith Gmbh, 7920 Heidenheim Headbox nozzle
DE3535849A1 (en) * 1985-10-08 1987-04-09 Voith Gmbh J M Setting device for the lip of a papermachine hatbox

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713272U1 (en) * 1997-07-25 1997-11-20 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Headbox to form a fiber suspension layer

Also Published As

Publication number Publication date
DE4239646C2 (en) 1995-04-06

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee