EP2789734A1 - Ensemble pour un dispositif de ligne de production de bande de fibre - Google Patents

Ensemble pour un dispositif de ligne de production de bande de fibre Download PDF

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Publication number
EP2789734A1
EP2789734A1 EP20130162894 EP13162894A EP2789734A1 EP 2789734 A1 EP2789734 A1 EP 2789734A1 EP 20130162894 EP20130162894 EP 20130162894 EP 13162894 A EP13162894 A EP 13162894A EP 2789734 A1 EP2789734 A1 EP 2789734A1
Authority
EP
European Patent Office
Prior art keywords
rod
blade
assembly
holder
sensors
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Withdrawn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
EP20130162894
Other languages
German (de)
English (en)
Inventor
Samppa Ahmaniemi
Tero Kovanen
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.)
Valmet Technologies Oy
Original Assignee
Valmet Technologies Oy
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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP20130162894 priority Critical patent/EP2789734A1/fr
Priority to US14/243,409 priority patent/US20140314946A1/en
Priority to CN201420159548.6U priority patent/CN204000455U/zh
Publication of EP2789734A1 publication Critical patent/EP2789734A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/78—Controlling or regulating not limited to any particular process or apparatus

Definitions

  • the present invention relates to an assembly comprising a rod or a blade for a device of a fiber web production line, especially to a rod-bed or a blade holder assembly for a rod or a blade of a device for coating or sizing a fiber web, particularly a paper or a board web, according to the preamble of claim 1.
  • a typical production and treatment line comprises a head box, a wire section and a press section as well as a subsequent drying section and a reel-up.
  • the production and treatment line can further comprise other devices and sections for finishing the fiber web, for example, a sizer, a calender, a coating section.
  • the production and treatment line also comprises at least one winder for forming customer rolls as well as a roll packaging apparatus.
  • fiber webs are meant for example paper and board webs.
  • sizing is used to alter the properties of a fiber web by adding sizing agents (sizing medium), for example glue chemicals.
  • Sizing can be divided to internal sizing and surface sizing.
  • internal sizing the sizing agent is added to pulp in the wet end of the fiber web machine before forming.
  • surface sizing the sizing agent is added onto the surface of the fiber web at the fiber web machine.
  • coating especially the surface of a fiber web is formed with a layer of coating paste (coating medium) at a coating station followed by drying.
  • the coating process can be divided in supplying the coating paste onto the web surface, which is called the application of the coating paste, as well as in the adjustment of final amount of coating paste.
  • the coating or the sizing of a fiber web typically utilizes a coating device - a coater - or a sizing device - a sizer.
  • a coating device - a coater - or a sizing device - a sizer In connection with the coaters and sizers different kinds of application technology for application of the coating medium or the sizing medium on the fiber web are employed, for example curtain technology or blade coating technology or film transfer technology or rod coating technology or air brush coating technology or spray coating technology.
  • rod-bed assemblies are used for the rod functioning as dosing element of the coating or sizing medium for scraping off the excessive medium quantity of the sizing or coating medium.
  • the rod coating or sizing assembly is composed of a rod and of a rod-bed comprising a holder to which the rod is attached directly or by means of an insert that is fitted into the holder for the rod.
  • the rod-bed is in turn attached to a beam or corresponding support structure arranged on the frame of the machine.
  • a web of paper or paperboard can be coated or surface sized using film-transfer or blade technology, wherein the web being treated is passed through a nip between two opposed rolls.
  • the coating or sizing medium is applied with the help of a suitable applicators to the surface of one or both of the nip-forming rolls, wherefrom the substance is transferred to the surface of the web being treated in the nip between the rolls.
  • the thickness and cross-machine profile of the coating or sizing medium layer applied to the roll surface are controlled by a blade or rotatable rod.
  • the blade or rod is attached to a holder.
  • the holder with accompanying support and fastening means is in turn attached to a beam or corresponding support structure arranged on the frame of the machine.
  • the beam or corresponding support structure of a coating / sizing rod/blade is arranged movable by loading means arranged at each end of the beam or corresponding support structure by which the main loading of the blade or rod is provided.
  • the loading of the blade or rod is typically arranged by profiling loading means for example by spindles that load cross-directional means for example a loading hose (a hose-loaded blade) and/or by a rigid loading plate, which spindles are spaced apart at certain intervals at the cross direction of the fiber web to be coated or sized.
  • the contact force of the blade or rod on the opposing surface is increased by means of loading hoses acting on the blade or rod holder.
  • Loading hoses normally have an oval cross-section. The loading hose is set between the holder and its support.
  • coating and sizing utilizing the dosing of the coating or sizing medium especially the quality and profile of the medium is controlled by automatically or manually controlling the surface pressure created by the rod or the blade by means of the loading means and the profiling loading means.
  • the surface pressure between the rod or the blade and the counter roll is not directly measured but instead the adjustments needed are done based on measurements of the fiber web and its coating/sizing layer.
  • the rod or the blade are loaded by adjusting pressure of a loading tube that is supported on a frame of the holder or by adjusting the rigid loading plate supported on a frame of the holder.
  • the loading presses the back of the holder and the rod or the blade towards the web to be coated or towards the corresponding coating or sizing roll, in order to build up the contact pressure of the rod or the blade against the web or against the roll.
  • there is also a loading plate or corresponding support plate on the back side (on the opposite side in respect of the holder) of the loading tube that is locally loaded by loading elements, for example by spindles that are spaced apart at certain intervals at the cross direction of the fiber web to be coated or sized.
  • a blade for doctoring a moving surface or for sizing or creping a fiber web produced or finished in a web machine, especially in a paper, board or tissue machine which comprises at least one fiber optical waveguide being arranged on a surface of the blade or embedded in the material of the blade.
  • Disadvantageous of this arrangement is that during use the blade wears and thus at regular intervals a new blade must be changed.
  • a blade with a fiber optical waveguide is expensive thus the changing costs increase.
  • the waveguide may wear and thus its signal level may change and on the surface the waveguide is susceptible to damage.
  • a calibration device for the pressure of a scraping device blade which abuts the periphery of a roll or a cylinder, in particular of a paper machine, a printing machine, a calender or the like, comprising a holding blade, a sensor holder mounted thereto, and a pressure sensor, for example a piezo element are positioned such that the position of the pressure sensor on the periphery of the roller or cylinder corresponds to the position of abutment of the blade.
  • a pressure sensor for example a piezo element
  • An object of the present invention is to create an assembly comprising a rod or a blade for a device of a fiber web production line in which the disadvantages of devices known from prior art are eliminated or at least minimized.
  • Yet another object of the present invention is to provide a rod-bed or a blade holder for a rod or a blade of a device for coating or sizing a fiber web, particularly a paper or a board web, in which the actual value of the loading pressure of the rod locally is received.
  • front side of the holder is meant the side on which the rod or the blade is located i.e. the side that is facing the web to be treated or the roll onto which the coating or sizing medium is applied and corresponding by the back side the side on which the loading means are located and which is facing the beam or corresponding support structure on which the holder is attached.
  • an assembly comprising a rod or a blade for a device of a fiber web production line, especially to a rod-bed or a blade holder assembly for a rod or a blade of a device for coating or sizing a fiber web, particularly a paper or a board web according to the invention is mainly characterized by the features of the claim 1.
  • the assembly comprises a holder, in which a rod or a blade is supported on the front side of the holder, and loading means and sensors, in particular piezo sensors, located in the holder between the rod or the blade and the loading means for measuring the loading pressure of the rod or the blade locally.
  • the sensors are located spaced apart at certain intervals at the cross direction of the fiber web to be coated or sized.
  • a cross-directional profile of the loading pressure is provided based on the measurement information and based on the profile information the loading means are adjusted manually or automatically to load such that desired profile is provided in coating or sizing.
  • the loading means comprise main loading means and profiling loading means.
  • the sensors in particular piezo sensors are located in the holder between the rod or the blade and the profiling loading means for measuring the loading pressure of the rod or the blade locally.
  • the rod-bed assembly comprises a holder, an insert removably and insertably supported in a groove of the holder and in which rod-bed assembly a rod of a coating or sizing or device is rotatably supported in a recess on the front side of the insert, which rod-bed assembly further comprises sensors, in particular piezo sensors, located in between the insert and the holder on the opposite side of the insert in respect of the rod located in the insert for measuring the loading pressure of the rod.
  • the rod-bed assembly comprises a holder, in which a rod of a coating or sizing or device is rotatably supported in a recess on the front side of the holder, which rod-bed assembly further comprises sensors, in particular piezo sensors located on the back side of the holder in respect of the rod for measuring the loading pressure of the rod.
  • the blade holder assembly comprises a holder and a blade supported in the holder, which assembly further comprises sensors, in particular piezo sensors, located between the blade and the loading means for measuring the loading pressure of the blade.
  • the sensors in particular the piezo sensors are located between the blade and the loading hose and/or between the loading hose and its loading means.
  • the sensors in particular the piezo sensors, are located between the blade or the rod and the rigid loading or support plate and/or between the loading or support plate and its loading means.
  • the sensors in particular piezo sensors are located spaced apart in cross direction of the web to be coated or sized desired intervals.
  • the sensors in particular piezo sensors, are located in a band comprising a number of spaced apart sensors.
  • the sensors in particular piezo sensors are located in loading direction of the rod or the blade in line with the rod or the blade.
  • the assembly comprises as loading means a loading tube and spindles loading the loading tube located on the opposite side in respect of the rod or the blade placed in the holder of the assembly i.e. on the back side of the holder.
  • the assembly has means for transmitting the measurement results of the sensors, in particular piezo sensors, to control means for control the loading means, in particular the spindles for regulating the pressure of the loading tube.
  • the sensors are located aligned with the spindles correspondingly spaced apart.
  • the assembly according to the invention is used as an up-grade kit of the assembly, in which the up-grade kit comprises as an expert service arranged measurement with the assembly and adjustment of the loading means to load the rod or the blade to provide the desired profile.
  • the assembly according to the invention is applicable in connection with continuous measurements or as troubleshooting equipment or during a start-up of a new device.
  • the profiling of the dosing of the coating or sizing medium by the rod or the blade is improved.
  • the locally existing peaks of loading can also be avoided and thus the wear of the rod or the blade, the rod-bed or the holder and the coating or sizing roll is decreased and thus the service time of the same increased.
  • the required quality level is achieved fast and thus the production can begin in a shorter time.
  • FIG 1A is schematically shown an example of the invention in connection with a rod-bed assembly.
  • the rod-bed assembly comprises a holder 13, an insert 12 removably and insertably supported in a groove of the holder 13 and in which rod-bed assembly a rod 11 of a coating or a sizing device is rotatably supported in a recess on the front side of the insert 12, which rod-bed assembly further comprises sensors, in particular piezo sensors 10, located in between the insert 12 and the holder 13 on the opposite side of the insert 12 in respect of the rod 11 located in the insert 12 for measuring the loading pressure of the rod 11.
  • the sensors, in particular piezo sensors 10 transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means ( fig. 3 ) of the rod-bed assembly.
  • FIG 1B is schematically shown an example of the invention in connection with a rod-bed assembly.
  • the rod-bed assembly comprises a holder 13 and in which a rod 11 of a coating or a sizing device is rotatably supported in a recess on the front side of the holder 13, which rod-bed assembly further comprises sensors, in particular piezo sensors 10 located on the back side of the holder 13 on the opposite side in respect to the rod 11 for measuring the loading pressure of the rod 11.
  • the sensors, in particular piezo sensors 10 transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means ( fig. 3 ) of the rod-bed assembly.
  • FIGS 2A and 2B are schematically shown examples of the invention in connection with a blade holder assembly and the blade holder assembly comprises a holder 25 and a blade 21.
  • the assembly further comprises sensors, in particular piezo sensors 10 located between the blade 21 and the loading means for measuring the loading pressure of the blade 21.
  • the sensors, in particular piezo sensors 10 transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means (24 and fig. 3 ) of the rod-bed assembly.
  • the blade holder assembly comprises a loading hose 24 and the sensors, in particular piezo sensors.
  • the sensors 10 are located between the blade 21 and the loading hose 24 and/or between the blade 24 and the loading means behind the loading hose 24 in the holder 25.
  • the sensors, in particular piezo sensors 10 transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means of the blade holder assembly.
  • the sensors 10 are located between the blade 21 and the holder 25.
  • the sensors in particular piezo sensors 10, transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means of the blade holder assembly.
  • FIG 3 is schematically shown an example of the loading arrangement in a coater or a sizer.
  • reference number 30 is indicated a roll of the coater or of the sizer.
  • Main loading means 26 are located at each end of the frame structure 29.
  • the assembly with the rod or the blade is attached to the frame structure by its rod-bed assembly or blade holder assembly and is located in view of the figure 3 behind the frame structure 29 opposing the roll 20 such that when loaded the rod or the blade are in loading pressure contact with the roll 10 i.e. the dosing the coating or sizing medium on the roll 10.
  • To the frame structure 20 is attached a loading or support plate 28 extending in cross direction i.e. horizontally in the view of figure 3 .
  • the profiling loading means 27, for example spindles 27 are located to load the loading or support plate 28 in cross direction.
  • the profiling loading means 27 are thus located spaced apart in the cross direction.
  • the sensors, in particular piezo sensors transmit measurement information to a receiver 31, which transmits the measurement information to a control system 32, which can directly or indirectly control the loading means 26, 27 of the rod-bed assembly.
EP20130162894 2013-04-09 2013-04-09 Ensemble pour un dispositif de ligne de production de bande de fibre Withdrawn EP2789734A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20130162894 EP2789734A1 (fr) 2013-04-09 2013-04-09 Ensemble pour un dispositif de ligne de production de bande de fibre
US14/243,409 US20140314946A1 (en) 2013-04-09 2014-04-02 Assembly for a Device of a Fiber Web Production Line
CN201420159548.6U CN204000455U (zh) 2013-04-09 2014-04-03 用于纤维幅材生产线的设备的组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130162894 EP2789734A1 (fr) 2013-04-09 2013-04-09 Ensemble pour un dispositif de ligne de production de bande de fibre

Publications (1)

Publication Number Publication Date
EP2789734A1 true EP2789734A1 (fr) 2014-10-15

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EP20130162894 Withdrawn EP2789734A1 (fr) 2013-04-09 2013-04-09 Ensemble pour un dispositif de ligne de production de bande de fibre

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US (1) US20140314946A1 (fr)
EP (1) EP2789734A1 (fr)
CN (1) CN204000455U (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017119526B4 (de) * 2017-08-25 2021-02-25 Joh. Clouth GmbH & Co KG Vorrichtung zum Halten von Schaberklingen

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418476A2 (fr) * 1989-08-18 1991-03-27 JAGENBERG Aktiengesellschaft Dispositif d'enduction d'un matériau en bande passant le long d'un contre-rouleau
EP0426980A2 (fr) * 1989-11-09 1991-05-15 Reinhard Esser Procédé et arrangement de fonctionnement d'un dispositif d'application
DE4302373A1 (de) * 1993-01-28 1994-08-04 Voith Gmbh J M Streicheinrichtung für laufende Bahnen aus Papier oder Karton
EP0900879A1 (fr) * 1997-09-02 1999-03-10 Voith Sulzer Papiermaschinen Gesellschaft mbH Appareil pour racler ou/et doser un matériau fluide ou pâteux sur une surface de travail en mouvement
WO2001020077A1 (fr) * 1999-09-14 2001-03-22 Metso Paper, Inc. Unite de racloir dans une machine a papier
DE102004018421B3 (de) * 2004-04-08 2005-07-21 Joh. Clouth Gmbh & Co. Kg Kalibriervorrichtung
DE102008023966A1 (de) * 2007-05-16 2008-11-20 Metso Paper, Inc. Anordnung, Anlage und Verfahren zur Bestimmung des Klingenanpressdrucks
WO2010099830A1 (fr) 2009-03-06 2010-09-10 Voith Patent Gmbh Raclette avec système de détection
WO2012013857A1 (fr) * 2010-07-26 2012-02-02 Metso Paper, Inc. Agencement, appareil et procédé pour déterminer une pression de lame

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5968269A (en) * 1998-10-21 1999-10-19 Voith Sulzer Paper Technology Noth America, Inc. Coater with multi-part and multi-use profile bar assembly
US8613972B2 (en) * 2008-01-24 2013-12-24 Metso Paper, Inc. Papermaking coating station with pressure-sensitive film roll

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418476A2 (fr) * 1989-08-18 1991-03-27 JAGENBERG Aktiengesellschaft Dispositif d'enduction d'un matériau en bande passant le long d'un contre-rouleau
EP0426980A2 (fr) * 1989-11-09 1991-05-15 Reinhard Esser Procédé et arrangement de fonctionnement d'un dispositif d'application
DE4302373A1 (de) * 1993-01-28 1994-08-04 Voith Gmbh J M Streicheinrichtung für laufende Bahnen aus Papier oder Karton
EP0900879A1 (fr) * 1997-09-02 1999-03-10 Voith Sulzer Papiermaschinen Gesellschaft mbH Appareil pour racler ou/et doser un matériau fluide ou pâteux sur une surface de travail en mouvement
WO2001020077A1 (fr) * 1999-09-14 2001-03-22 Metso Paper, Inc. Unite de racloir dans une machine a papier
DE102004018421B3 (de) * 2004-04-08 2005-07-21 Joh. Clouth Gmbh & Co. Kg Kalibriervorrichtung
US20050223513A1 (en) 2004-04-08 2005-10-13 Joh. Clouth Gmbh & Co. Kg Calibration device
DE102008023966A1 (de) * 2007-05-16 2008-11-20 Metso Paper, Inc. Anordnung, Anlage und Verfahren zur Bestimmung des Klingenanpressdrucks
WO2010099830A1 (fr) 2009-03-06 2010-09-10 Voith Patent Gmbh Raclette avec système de détection
WO2012013857A1 (fr) * 2010-07-26 2012-02-02 Metso Paper, Inc. Agencement, appareil et procédé pour déterminer une pression de lame

Also Published As

Publication number Publication date
US20140314946A1 (en) 2014-10-23
CN204000455U (zh) 2014-12-10

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