EP1319744A2 - Method and device for measuring and regulating the nip pressure in the press of a papermaking machine - Google Patents

Method and device for measuring and regulating the nip pressure in the press of a papermaking machine Download PDF

Info

Publication number
EP1319744A2
EP1319744A2 EP02027242A EP02027242A EP1319744A2 EP 1319744 A2 EP1319744 A2 EP 1319744A2 EP 02027242 A EP02027242 A EP 02027242A EP 02027242 A EP02027242 A EP 02027242A EP 1319744 A2 EP1319744 A2 EP 1319744A2
Authority
EP
European Patent Office
Prior art keywords
press
pressure
measuring
nip
web
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Withdrawn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
EP02027242A
Other languages
German (de)
French (fr)
Other versions
EP1319744A3 (en
Inventor
Harald Weigant
Harald Dipl.Ing. Michels
Simone Dipl.Ing. Koidl
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.)
Andritz AG
Original Assignee
Andritz AG
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 Andritz AG filed Critical Andritz AG
Publication of EP1319744A2 publication Critical patent/EP1319744A2/en
Publication of EP1319744A3 publication Critical patent/EP1319744A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • D21F3/06—Means for regulating the pressure
    • 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
    • D21F7/06—Indicating or regulating the thickness of the layer; Signal devices

Definitions

  • the invention relates to a method for measuring and controlling the Nip réelles in the press of a paper machine, especially in one Shoe press, across and / or along the web running direction. Furthermore concerns the invention an apparatus for performing the method.
  • the aim of the invention is thus a method and device for measurement and regulation of the nip pressure in the transverse and / or longitudinal direction a press to achieve a uniform moisture profile or Setting paper quality parameters to create.
  • the invention is therefore characterized in that the hydraulic static pressure at reference points via measuring holes in the press nip is measured.
  • the Pressure setpoint for regulating the nip pressure in the transverse direction or Determine the actual pressure curve in the longitudinal direction very well.
  • An advantageous development of the invention is characterized in that that the nip pressure of the press in the transverse direction to this setpoint regulated and thus continuously adapted. With such a Regulation can be done in any production state across the machine direction achieve an even press work.
  • a favorable embodiment of the invention is characterized in that that the setpoint of the pressure is set differently across the web width becomes. This can specifically influence the moisture profile of the paper web become.
  • the invention also relates to a device for measurement and control the nip pressure in the press of a paper machine, especially in a Shoe press, across and / or along the web running direction. It is through it characterized that across the press and / or Measuring holes are provided along the web running direction, which in the Press nip is sufficient. By measuring the pressure The entire pressure curve can be exactly determined using reference points regulate accordingly.
  • the nip pressure profile can also be particularly good the moisture profile can be controlled across the web direction.
  • the press shoe position in Longitudinal direction are shifted and thus the nip pressure longitudinal profile in Nip can be set or regulated.
  • FIG. 1 shows a schematic pressure curve in a press
  • FIG. 2 a cross section through a press roller
  • Fig. 3 is a plan view and Cross section on the press shoe of a shoe press according to the invention shows.
  • Fig. 1 shows a course of the pressure of a shoe press in Web direction x.
  • curves 1a, 1b, 1c for different products.
  • Positions 2, 2a, 2b, 2c for pressure measuring points in the web running direction are shown. By knowing the pressure values at these points, the Determine influence on paper quality and correct or regulate.
  • This counter roll 5 can optionally also be the drying cylinder a tissue machine.
  • the roller consists of an outer press jacket 6 and a support ring 7 on which the pressure shoe 8 is supported.
  • the pressure shoe 8 is attached to the press jacket 6 by means of pressing elements 9 pressed.
  • a return spring 10 is provided here for pressure relief.
  • the shoe end stop 15 is adjustable in the direction of web travel.
  • measuring bores 13, 13 ', 13 "and 14, 14', 14", 14 "'shown Measuring bores 14, 14 ', 14 ", 14"' are transverse to the web running direction arranged, while the measuring bores 13, 13 'and 13 "with a Bore 14 are arranged in the direction of web travel. These measuring holes correspond to the measuring points 2, 2a, 2b, 2c in FIG. 1.
  • Fig. 4 shows a section along line A-B in Fig. 2. It is here Shoe press roll 4 and the counter roll 5 shown. Over the web width are several pressure elements for pressing the pressure shoe intended. These can be done independently of one another via the oil supply line be operated. The relief is provided by return springs 10.
  • Fig. 5 shows a control scheme for a system according to the invention.
  • the oil pressure in the nip resulting from the admission pressure control becomes measured redundantly directly in the nip of the main zone, the measured values one Averaged and after evaluation with a correction factor used as a theoretical setpoint for the border zone control.
  • the position of the pressure measurements for the main zone is also variable.
  • Each edge zone has its own PID controller, wherein the actuator in the oil supply line to the pressure element of the respective Edge zone in front of the roller and the pressure measurement directly in the nip in the Position of the respective edge zone takes place.
  • this control concept gives the possibility of To keep pressure directly in the nip across the entire width and thus to achieve a really even line load.

Landscapes

  • Paper (AREA)

Abstract

To control the pressure on a moving paper web through the press section of a papermaking machine, where the web passes between press rollers to extract water and especially a shoe press, the pressure on the web is measured at the press nip across and/or along the direction of web movement. The hydraulic static pressure is measured in the press nip through measurement drillings at the edges of the web and across it, and continuously brought into alignment through comparison with nominal values.

Description

Die Erfindung betrifft ein Verfahren zur Messung und Regelung des Nipdrucks in der Presse einer Papiermaschine, insbesondere in einer Schuhpresse, quer und/oder längs zur Bahnlaufrichtung. Weiters betrifft die Erfindung eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for measuring and controlling the Nipdrucks in the press of a paper machine, especially in one Shoe press, across and / or along the web running direction. Furthermore concerns the invention an apparatus for performing the method.

Zur Steuerung der Entwässerung von Pressen im Bereich der Papierherstellung ist es erforderlich, den geeigneten Nipdruck einzustellen. Aus diesem Grund gibt es eine Reihe von theoretischen Berechnungsansätzen. Dies ist für ideale Bedingungen noch möglich. Speziell in Randzonen einer Papierbahn, beispielsweise am Kreppzylinder einer Tissuemaschine, treten jedoch ungleichmäßige Bedingungen auf, die sich durch eine Berechnung nicht mehr exakt erfassen lassen. Andererseits gibt es auch Betriebsparameter, die zwar berechnet, aber aus Produktionsgründen nicht eingestellt werden können.To control the dewatering of presses in the field of paper production it is necessary to set the appropriate nip pressure. Out for this reason there are a number of theoretical calculation approaches. This is still possible for ideal conditions. Especially in peripheral areas a paper web, for example on the crepe cylinder of a tissue machine, however, uneven conditions occur which are characterized by no longer allow a calculation to be recorded exactly. On the other hand, there is also operating parameters that are calculated, but for production reasons cannot be set.

Ziel der Erfindung ist es somit ein Verfahren und Vorrichtung zur Messung und Regelung des Nipdruckes in Querrichtung und/oder Längsrichtung einer Presse zur Erreichung eines gleichmäßigen Feuchteprofiles bzw. zur Einstellung von Papierqualitätsparametern zu schaffen.The aim of the invention is thus a method and device for measurement and regulation of the nip pressure in the transverse and / or longitudinal direction a press to achieve a uniform moisture profile or Setting paper quality parameters to create.

Die Erfindung ist daher dadurch gekennzeichnet, dass der hydraulisch statische Druck an Referenzpunkten über Messbohrungen im Pressnip gemessen wird. Durch die Messung von Referenzpunkten lässt sich der Drucksollwert zur Regelung des Nipdruckes in Querrichtung bzw. die Istdruckkurve in Längsrichtung sehr gut eruieren.The invention is therefore characterized in that the hydraulic static pressure at reference points via measuring holes in the press nip is measured. By measuring reference points, the Pressure setpoint for regulating the nip pressure in the transverse direction or Determine the actual pressure curve in the longitudinal direction very well.

Eine vorteilhafte Weiterbildung der Erfindung ist dadurch gekennzeichnet, dass der Nipdruck der Presse in Querrichtung auf diesen Sollwert geregelt und damit auch laufend angepasst wird. Mit einer derartigen Regelung lässt sich bei jedem Produktionszustand quer zur Maschinenlaufrichtung eine gleichmäßige Pressenarbeit erzielen.An advantageous development of the invention is characterized in that that the nip pressure of the press in the transverse direction to this setpoint regulated and thus continuously adapted. With such a Regulation can be done in any production state across the machine direction achieve an even press work.

Eine günstige Ausgestaltung der Erfindung ist dadurch gekennzeichnet, dass der Sollwert des Druckes über die Bahnbreite unterschiedlich eingestellt wird. Dadurch kann gezielt das Feuchteprofil der Papierbahn beeinflusst werden. A favorable embodiment of the invention is characterized in that that the setpoint of the pressure is set differently across the web width becomes. This can specifically influence the moisture profile of the paper web become.

Die Erfindung betrifft auch eine Vorrichtung zur Messung und Regelung des Nipdrucks in der Presse einer Papiermaschine, insbesondere in einer Schuhpresse, quer und/oder längs zur Bahnlaufrichtung. Sie ist dadurch gekennzeichnet, dass an mehreren Stellen der Presse quer und/oder längs zur Bahnlaufrichtung Messbohrungen vorgesehen sind, die in den Pressspalt (Pressnip) reichen. Durch die Messung des Druckes an Referenzpunkten lässt sich der gesamte Druckverlauf exakt eruieren und entsprechend regeln.The invention also relates to a device for measurement and control the nip pressure in the press of a paper machine, especially in a Shoe press, across and / or along the web running direction. It is through it characterized that across the press and / or Measuring holes are provided along the web running direction, which in the Press nip is sufficient. By measuring the pressure The entire pressure curve can be exactly determined using reference points regulate accordingly.

Werden Messbohrungen im Randbereich vorgesehen, so können besonders gut die nicht berechenbaren Bereiche geregelt werden.If measuring holes are provided in the edge area, you can the unpredictable areas are particularly well regulated.

Wenn über die Bahnbreite mehrere Anpresselemente, beispielsweise Anpresskolben, vorgesehen sind, die zur Gänze oder zum Teil regelbar ausgeführt sein können, kann besonders gut das Nipdruckprofil bzw. auch das Feuchteprofil quer zur Bahnlaufrichtung geregelt werden.If several pressure elements, for example, over the web width Pressure pistons are provided, which are fully or partially adjustable can be executed, the nip pressure profile can also be particularly good the moisture profile can be controlled across the web direction.

Durch einen verstellbaren Schuhanschlag kann die Pressschuhposition in Längsrichtung verschoben werden und somit das Nipdrucklängsprofil im Nip eingestellt bzw. geregelt werden.With an adjustable shoe stop, the press shoe position in Longitudinal direction are shifted and thus the nip pressure longitudinal profile in Nip can be set or regulated.

Die Erfindung wird nun anhand der Zeichnungen beispielhaft beschrieben, wobei Fig. 1 einen schematischen Druckverlauf in einer Presse, Fig. 2 einen Querschnitt durch eine Presswalze und Fig. 3 eine Draufsicht und Querschnitt auf den Pressschuh einer Schuhpresse gemäß der Erfindung zeigt.The invention will now be described by way of example with reference to the drawings, 1 shows a schematic pressure curve in a press, FIG. 2 a cross section through a press roller and Fig. 3 is a plan view and Cross section on the press shoe of a shoe press according to the invention shows.

Fig. 1 zeigt einen Verlauf des Pressdruckes einer Schuhpresse in Bahnlaufrichtung x. Es sind darin mehrere unterschiedliche Kurven 1a, 1b, 1c für verschiedene Produkte dargestellt. Weiters sind mögliche Positionen 2, 2a, 2b, 2c für Druckmessstellen in Bahnlaufrichtung eingezeichnet. Durch Kenntnis der Druckwerte an diesen Stellen lässt sich der Einfluss auf die Papierqualität feststellen und korrigieren bzw. regeln.Fig. 1 shows a course of the pressure of a shoe press in Web direction x. There are several different curves 1a, 1b, 1c for different products. Furthermore, are possible Positions 2, 2a, 2b, 2c for pressure measuring points in the web running direction are shown. By knowing the pressure values at these points, the Determine influence on paper quality and correct or regulate.

In Fig. 2 ist nun eine Schuhpresswalze 4 mit einer Gegenwalze 5 dargestellt. Diese Gegenwalze 5 kann gegebenenfalls auch der Trockenzylinder einer Tissuemaschine sein. Die Walze besteht aus einem äußeren Pressmantel 6 und einem Tragring 7 auf dem der Druckschuh 8 abgestützt ist. Der Druckschuh 8 wird mittels Anpresselementen 9 an den Pressmantel 6 angepresst. Als Gegenkraft und zur Rückholung des Pressschuhs bei Druckentlastung ist hier eine Rückholfeder 10 vorgesehen. Durch den durch den Druckschuh 8 auf den Pressmantel 6 erzeugten Druck wird die auf dem Filz 11 transportierte Papierbahn 12 gegen die Gegenwalze 5 gepresst und entwässert. Anschließend kann die Papierbahn 12 gemeinsam mit der Gegenwalze weiterbefördert werden. Ist diese Gegenwalze 5 der Trockenzylinder einer Tissuemaschine, so beginnt hier dann die thermische Trocknung des Papiers. Je mehr Wasser durch die Presse aus der Papierbahn entfernt wird, um so höher ist die Trocknungskapazität des Trockenzylinders.2 shows a shoe press roll 4 with a counter roll 5. This counter roll 5 can optionally also be the drying cylinder a tissue machine. The roller consists of an outer press jacket 6 and a support ring 7 on which the pressure shoe 8 is supported. The pressure shoe 8 is attached to the press jacket 6 by means of pressing elements 9 pressed. As a counterforce and for the return of the press shoe at A return spring 10 is provided here for pressure relief. By the the pressure generated by the pressure shoe 8 on the press jacket 6 paper web 12 transported on the felt 11 against the counter roller 5 pressed and drained. The paper web 12 can then to be conveyed together with the counter roller. Is this counter roller 5 the drying cylinder of a tissue machine, this is where it starts the thermal drying of the paper. The more water through the press is removed from the paper web, the higher the drying capacity of the drying cylinder.

Zur Regelung eines Feuchteprofils quer zur Bahnlaufrichtung und auch zum Ausgleich der Randeinflüsse werden quer zur Bahnlaufrichtung mehrere Anpresselemente 9 vorgesehen, die jedes oder zum Teil getrennt geregelt werden können.To regulate a moisture profile transverse to the web running direction and also to compensate for the edge influences are transverse to the web running direction several pressing elements 9 are provided, each separately or in part can be regulated.

Zur gezielten Beeinflussung des Nipdrucklängsprofils bzw. der Papierqualität ist der Schuhendanschlag 15 in Bahnlaufrichtung verstellbar.For the targeted influencing of the longitudinal nip pressure profile or the paper quality the shoe end stop 15 is adjustable in the direction of web travel.

In Fig. 3 ist eine Draufsicht auf einen Druckschuh 8 dargestellt. Es sind hier Messbohrungen 13, 13', 13" und 14, 14', 14", 14"' gezeigt. Die Messbohrungen 14, 14', 14", 14"' sind quer zur Bahnlaufrichtung angeordnet, während die Messbohrungen 13, 13' und 13" mit einer Bohrung 14 in Bahnlaufrichtung angeordnet sind. Diese Messbohrungen entsprechen den Messstellen 2, 2a, 2b, 2c in Fig. 1.3 shows a plan view of a pressure shoe 8. There are here measuring bores 13, 13 ', 13 "and 14, 14', 14", 14 "'shown Measuring bores 14, 14 ', 14 ", 14"' are transverse to the web running direction arranged, while the measuring bores 13, 13 'and 13 "with a Bore 14 are arranged in the direction of web travel. These measuring holes correspond to the measuring points 2, 2a, 2b, 2c in FIG. 1.

Fig. 4 zeigt einen Schnitt gemäß Linie A-B in Fig. 2. Es ist hier die Schuhpresswalze 4 sowie die Gegenwalze 5 dargestellt. Über die Bahnbreite sind zur Anpressung des Druckschuhes mehrere Anpresselemente vorgesehen. Diese können über die Ölzuleitung unabhängig voneinander betätigt werden. Die Entlastung erfolgt durch Rückholfedern 10. Fig. 4 shows a section along line A-B in Fig. 2. It is here Shoe press roll 4 and the counter roll 5 shown. Over the web width are several pressure elements for pressing the pressure shoe intended. These can be done independently of one another via the oil supply line be operated. The relief is provided by return springs 10.

Fig. 5 zeigt ein Regelschema für eine Anlage gemäß der Erfindung.Fig. 5 shows a control scheme for a system according to the invention.

Grundsätzlich erfolgt die Regelung aufgeteilt in verschiedene Bereiche über die Maschinenbreite:Basically, the regulation is divided into different areas across the machine width:

Es wird unterschieden zwischen der Hauptzone A1 in der Maschinenmitte und den Randzonen trieb- und führerseitig (Z1..Zn, Y1..Yn), wobei die Anzahl der Randzonen variabel ist. Ausgehend von der theoretischen Berechnung des zum Erreichen einer gewählten Linienlast erforderlichen Ölvordruckes für die Anpresselemente in der Hauptzone wird der Druck in der Ölzuleitung zur Hauptzone geregelt (Regelung des Vordruckes mit PID Regler). Der Bediener wählt die gewünschte Linienlast im Leitsystem.A distinction is made between the main zone A1 in the middle of the machine and the edge zones on the drive and driver side (Z1..Zn, Y1..Yn), the The number of peripheral zones is variable. Starting from the theoretical Calculation of the required to achieve a selected line load Oil pressure for the pressure elements in the main zone is the pressure in the oil supply to the main zone is regulated (control of the admission pressure with PID controller). The operator selects the desired line load in the control system.

Der sich aus der Vordruckregelung ergebende Öldruck im Nip wird redundant direkt im Nip der Hauptzone gemessen, die Messwerte einer Mittelwertbildung unterzogen und nach Bewertung mit einem Korrekturfaktor als theoretischer Sollwert für die Randzonenregelung verwendet. Die Position der Druckmessungen für die Hauptzone ist ebenfalls variabel.The oil pressure in the nip resulting from the admission pressure control becomes measured redundantly directly in the nip of the main zone, the measured values one Averaged and after evaluation with a correction factor used as a theoretical setpoint for the border zone control. The position of the pressure measurements for the main zone is also variable.

Dieser gemeinsame Randzonensollwert wird nun wiederum für jede einzelne Randzone einer Anpassung gemäß den Betriebserfordernissen unterworfen und den einzelnen PID Reglern als Remote-Sollwert zugeführt. Hierbei verfügt jede Randzone über einen eigenen PID Regler, wobei das Stellglied in der Ölzuleitung zum Anpresselement der jeweiligen Randzone vor der Walze sitzt und die Druckmessung direkt im Nip in der Position der jeweiligen Randzone erfolgt.This common boundary zone setpoint is now again for each individual marginal zone of an adjustment according to the operating requirements subjected and supplied to the individual PID controllers as a remote setpoint. Each edge zone has its own PID controller, wherein the actuator in the oil supply line to the pressure element of the respective Edge zone in front of the roller and the pressure measurement directly in the nip in the Position of the respective edge zone takes place.

Aus diesem Regelkonzept ergibt sich also erstmalig die Möglichkeit, den Druck direkt im Nip über die gesamte Breite konstant zu halten und somit eine real gleichmäßige Linienlast zu erreichen.For the first time, this control concept gives the possibility of To keep pressure directly in the nip across the entire width and thus to achieve a really even line load.

Claims (9)

Verfahren zur Messung und Regelung des Nipdrucks in der Presse einer Papiermaschine, insbesondere in einer Schuhpresse, quer und/oder längs zur Bahnlaufrichtung, dadurch gekennzeichnet, dass der hydraulisch statische Druck an Referenzpunkten über Messbohrungen im Pressnip gemessen und laufend angepasst wird.Method for measuring and controlling the nip pressure in the press of a paper machine, in particular in a shoe press, transversely and / or lengthways to the web running direction, characterized in that the hydraulic static pressure is measured at reference points via measuring bores in the press nip and is continuously adapted. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Nipdruck in der Presse quer und/oder längs auf einen Sollwert eingestellt wird.A method according to claim 1, characterized in that the nip pressure in the press is set transversely and / or lengthways to a target value. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Messwerte einer Mittelwertbildung unterzogen werden und anschließend mit einem Korrekturfaktor versehen einen neuen Sollwert bilden.Method according to claim 1 or 2, characterized in that the measured values are subjected to averaging and then provided with a correction factor form a new target value. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Nipdruck in den Randzonen laufend angepasst wird.Method according to one of claims 1 to 3, characterized in that the nip pressure in the edge zones is continuously adjusted. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Sollwert des Druckes über die Bahnbreite unterschiedlich eingestellt wird.Method according to one of claims 1 to 4, characterized in that the nominal value of the pressure is set differently over the web width. Vorrichtung zur Messung und Regelung des Nipdrucks in der Presse einer Papiermaschine, insbesondere in einer Schuhpresse, quer und/oder längs zur Bahnlaufrichtung, dadurch gekennzeichnet, dass an mehreren Stellen der Presse quer und/oder längs zur Bahnlaufrichtung Messbohrungen vorgesehen sind, die in den Pressspalt (Pressnip) reichen.Device for measuring and regulating the nip pressure in the press of a paper machine, in particular in a shoe press, transversely and / or longitudinally to the web running direction, characterized in that measuring bores are provided in several points of the press transversely and / or longitudinally to the web running direction, which are provided in the press nip (Pressnip) are enough. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass Messbohrungen im Randbereich vorgesehen sind.Apparatus according to claim 6, characterized in that measuring holes are provided in the edge area. Vorrichtung nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass über die Bahnbreite mehrere Anpresselemente, beispielsweise Anpresskolben, vorgesehen sind, die regelbar ausgeführt sind.Apparatus according to claim 6 or 7, characterized in that a plurality of pressure elements, for example pressure pistons, are provided over the web width and are designed to be controllable. Vorrichtung nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass der Schuhanschlag in Längsrichtung, insbesondere während des Betriebs, verstellbar istDevice according to one of claims 6 to 8, characterized in that the shoe stop is adjustable in the longitudinal direction, in particular during operation
EP02027242A 2001-12-17 2002-12-06 Method and device for measuring and regulating the nip pressure in the press of a papermaking machine Withdrawn EP1319744A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT19692001 2001-12-17
AT0196901A AT410452B (en) 2001-12-17 2001-12-17 To control the roller nip pressure at the shoe press in a papermaking machine, the hydraulic static pressure is measured at drillings along/across the web for comparison with nominal values for continuous alignment

Publications (2)

Publication Number Publication Date
EP1319744A2 true EP1319744A2 (en) 2003-06-18
EP1319744A3 EP1319744A3 (en) 2004-01-07

Family

ID=3689484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027242A Withdrawn EP1319744A3 (en) 2001-12-17 2002-12-06 Method and device for measuring and regulating the nip pressure in the press of a papermaking machine

Country Status (5)

Country Link
US (1) US6835283B2 (en)
EP (1) EP1319744A3 (en)
AT (1) AT410452B (en)
BR (1) BR0205407A (en)
MX (1) MXPA02012536A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10260202A1 (en) * 2002-06-25 2004-01-22 Voith Paper Patent Gmbh Device for influencing and / or monitoring a pressure profile
EP1342838B1 (en) * 2002-03-05 2006-07-05 Voith Paper Patent GmbH Machine for manufacturing a tissue web
US7527708B2 (en) 2003-10-21 2009-05-05 Metso Paper Karlstad Ab Support body, holding device therefor, apparatus with said body for treatment of a web, and methods of forming an extended nip in the apparatus and controlling load in the nip
US7686924B2 (en) 2003-10-21 2010-03-30 Metso Paper Karlstad Ab Support body, holding device therefor, apparatus with such body for treatment of a web, methods of forming an extended nip in the apparatus and controlling load in the nip
EP3488968B1 (en) * 2015-12-09 2022-12-28 Steinemann Technology AG Device for fixing a sanding shoe

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050098290A1 (en) * 2002-06-25 2005-05-12 Voith Paper Patent Gmbh System and method for influencing and/or monitoring a press pressure profile
US7185537B2 (en) * 2003-06-04 2007-03-06 Metso Paper, Inc. Nip and loading analysis system
DE10361269B4 (en) * 2003-12-24 2008-09-18 Md Papier Gmbh & Co. Kg Wide nip press for treating a material web
US9481777B2 (en) 2012-03-30 2016-11-01 The Procter & Gamble Company Method of dewatering in a continuous high internal phase emulsion foam forming process
CN110424183A (en) * 2019-08-14 2019-11-08 浙江华章科技有限公司 A kind of sizing applicator press nip value control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319323A1 (en) * 1993-06-11 1993-11-04 Voith Gmbh J M Paper-making press section - has units to reduce pressure at web edges to ends of the press shoe to eliminate pressure peaks
EP0674043A1 (en) * 1994-03-18 1995-09-27 Voith Sulzer Papiermaschinen GmbH Apparatus for treating a fibrous web
DE19642047A1 (en) * 1996-10-11 1998-04-16 Voith Sulzer Papiermasch Gmbh Press unit of a paper or paperboard-making machine
EP0950758A2 (en) * 1998-04-16 1999-10-20 Voith Sulzer Papiertechnik Patent GmbH Pressing arrangement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI76872C (en) * 1987-02-23 1988-12-12 Valmet Paper Machinery Inc Method and apparatus for controlling zone rollers.
US5047122A (en) * 1989-06-23 1991-09-10 Beloit Corporation Method for heated extended nip pressing
FI86771C (en) * 1991-10-14 1992-10-12 Valmet Paper Machinery Inc FOERFARANDE OCH ANORDNING FOER MAETNING AV NYPKRAFTEN OCH / ELLER -TRYCKET AV ETT NYP SOM BILDAS AV EN ROTERANDE VALS ELLER ETT BAND SOM ANVAENDS VID FRAMSTAELLNING AV PAPPER
US5592875A (en) * 1994-09-16 1997-01-14 Stowe Woodward Licensco, Inc. Roll having means for determining pressure distribution
CA2177803A1 (en) * 1995-06-01 1996-12-02 Robert H. Moore Nip pressure sensing system
DE19616980B4 (en) * 1996-04-27 2008-03-13 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Deflecting
DE19704447A1 (en) * 1997-02-06 1998-08-13 Schloemann Siemag Ag Flatness measuring roller
FI112262B (en) * 1997-05-30 2003-11-14 Metso Paper Inc Method and plant in a paper / cardboard machine in the press section or between the press section and the drying section in controlling the speed difference
US6370961B1 (en) * 1999-01-29 2002-04-16 Constantin M. Trantzas Nipped roller impression sensor system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319323A1 (en) * 1993-06-11 1993-11-04 Voith Gmbh J M Paper-making press section - has units to reduce pressure at web edges to ends of the press shoe to eliminate pressure peaks
EP0674043A1 (en) * 1994-03-18 1995-09-27 Voith Sulzer Papiermaschinen GmbH Apparatus for treating a fibrous web
DE19642047A1 (en) * 1996-10-11 1998-04-16 Voith Sulzer Papiermasch Gmbh Press unit of a paper or paperboard-making machine
EP0950758A2 (en) * 1998-04-16 1999-10-20 Voith Sulzer Papiertechnik Patent GmbH Pressing arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342838B1 (en) * 2002-03-05 2006-07-05 Voith Paper Patent GmbH Machine for manufacturing a tissue web
DE10260202A1 (en) * 2002-06-25 2004-01-22 Voith Paper Patent Gmbh Device for influencing and / or monitoring a pressure profile
US7527708B2 (en) 2003-10-21 2009-05-05 Metso Paper Karlstad Ab Support body, holding device therefor, apparatus with said body for treatment of a web, and methods of forming an extended nip in the apparatus and controlling load in the nip
US7686924B2 (en) 2003-10-21 2010-03-30 Metso Paper Karlstad Ab Support body, holding device therefor, apparatus with such body for treatment of a web, methods of forming an extended nip in the apparatus and controlling load in the nip
US7887674B2 (en) 2003-10-21 2011-02-15 Metso Paper Karlstad Ab Methods of forming an extended nip in a web-treatment apparatus and controlling load in the nip, employing an elastic support body as one of the nip-forming elements
US8062481B2 (en) 2006-04-21 2011-11-22 Metso Paper Karlstad Ab Support body for an apparatus having an extended nip for the treatment of a fibre web
EP3488968B1 (en) * 2015-12-09 2022-12-28 Steinemann Technology AG Device for fixing a sanding shoe

Also Published As

Publication number Publication date
ATA19692001A (en) 2002-09-15
EP1319744A3 (en) 2004-01-07
MXPA02012536A (en) 2003-06-25
BR0205407A (en) 2004-07-20
US20030127211A1 (en) 2003-07-10
AT410452B (en) 2003-05-26
US6835283B2 (en) 2004-12-28

Similar Documents

Publication Publication Date Title
DE2823738C2 (en) Method for leveling (smoothing) a paper web
DE3131799C2 (en) Roller press for paper and similar webs, in particular calenders
DE10214322B4 (en) Continuous press for pressing pressed material mats into pressed slabs
DE4341341C1 (en) Metering system for devices for coating material webs, in particular paper or board webs
EP0312878B1 (en) Process for operating a calander and calander for the application of the process
DE4442746C1 (en) Method and device for treating a material web
DE3020669C2 (en) Process for controlling the line pressure distribution in a calender and a corresponding calender
DE3201635C2 (en) Calender arrangement
AT410452B (en) To control the roller nip pressure at the shoe press in a papermaking machine, the hydraulic static pressure is measured at drillings along/across the web for comparison with nominal values for continuous alignment
DE3007452C2 (en) Process for regulating the pressure exerted in a calender and calender for carrying out this process
EP0829575A1 (en) Process and device for direct or indirect application of liquid or pasty media on a running material web
EP0773104B1 (en) Method for grading and printing paper webs and printing machine for carrying out the method
EP2527115B1 (en) Continuous press and associated process
DE102005031445A1 (en) Wetting treatment of fibrous sheet, e.g. of paper or cardboard, involves applying combination of steam and water in amounts dependent on independently measured parameters
DE102006003637A1 (en) Process for producing or treating a fibrous web
DE60122590T2 (en) A method of controlling one or more surface quality variables on a fibrous web in a shoe calender
EP0772715B1 (en) Use of a roll
DE4345345C2 (en) roller
DE3533210C2 (en)
EP0799933B1 (en) Calander for paper or the like
DE10239337A1 (en) Paper machine steel drive belt transverse position regulated by two lateral cylinders and a balancing cylinder
DE10229155A1 (en) Adjustment to the longitudinal/lateral pressure profile for a moving web, through a press gap, changes the contour of the press shoe body through an inner chamber which is pressurized and/or heated/cooled
DE19803323A1 (en) Process for operating a calender and calender
WO2016034688A1 (en) Continuously working press and method for operating presses of this type
DE2638814C2 (en) Device for regulating the web tension in a system for the continuous treatment of a web of material

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RIC1 Information provided on ipc code assigned before grant

Ipc: 7D 21F 3/06 B

Ipc: 7D 21F 3/02 A

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO

17P Request for examination filed

Effective date: 20040323

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR

17Q First examination report despatched

Effective date: 20060727

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20090701