EP2157240A2 - Dispositif d'application de rideau - Google Patents

Dispositif d'application de rideau Download PDF

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Publication number
EP2157240A2
EP2157240A2 EP09168055A EP09168055A EP2157240A2 EP 2157240 A2 EP2157240 A2 EP 2157240A2 EP 09168055 A EP09168055 A EP 09168055A EP 09168055 A EP09168055 A EP 09168055A EP 2157240 A2 EP2157240 A2 EP 2157240A2
Authority
EP
European Patent Office
Prior art keywords
deflection
material web
section
course
drying
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
EP09168055A
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German (de)
English (en)
Other versions
EP2157240A3 (fr
EP2157240B1 (fr
Inventor
Michael Dr. Trefz
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 Patent 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
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Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2157240A2 publication Critical patent/EP2157240A2/fr
Publication of EP2157240A3 publication Critical patent/EP2157240A3/fr
Application granted granted Critical
Publication of EP2157240B1 publication Critical patent/EP2157240B1/fr
Revoked 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
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters

Definitions

  • the invention relates to a machine for applying a liquid or pasty application medium on at least one surface of a moving material web, in particular of paper or cardboard by means of at least one curtain applicator and drying the applied application medium by means of at least one non-contact drying device; wherein the material web in the machine passes a plurality of deflecting arrangements which touch the material web, which define mutually offset or / and in different directions extending sections of the material web course; wherein the curtain applicator dispenses the application medium from at least one discharge opening, in particular a slot nozzle or sliding layer nozzle, in the form of a monolayer or multilayer curtain which under the influence of gravity and optionally influences further forces towards the associated surface of the material web in an application section of the material web course, which extends substantially horizontally or according to a radius of a deflection and support roller of the curtain applicator or at least has a horizontally greater movement speed component than in the vertical direction; wherein the web of material in at least one of the order section following Drying section of the material flow, the
  • curtain coating machine also known as the "curtain coater”
  • curtain coater are known in various designs and have gained in importance in recent years for the coating of paper and cardboard.
  • the water In the contactless drying section, the water is usually heated by infrared radiators or hot air dryer and evaporated. It is well known that drying should begin as soon as possible after painting. This prevents penetration of soluble constituents from the liquid coating color into the paper, i. H. whose fiber network, migrate, or the extent of this migration is limited.
  • the liquid components of the ink should be preserved in the filler matrix of the coating color, generally the application medium, since they provide good quality for later printing.
  • Fig. 8 shows several examples of common coating methods, namely for the blade or knife coating (subfigures 8a) and 8b)) and the film coating ( Fig. 8c )).
  • the first drying element is usually arranged after only one web deflection.
  • the distance between application of paint and the beginning of drying is usually between 2 and 8 meters.
  • the distance from the place of the job to the beginning of the drying is thus significantly longer than other coating methods, which is disadvantageous and can have particular disadvantages for the print quality and greater mechanical complexity due to the use of relatively many guide or guide rollers (Leit- or Deflection rollers) means.
  • the first section of the material web course immediately following the deflection in the course and / or at the end of the application section is a drying section in which the material web undergoes at least one non-contact, application medium of a heat action Drying device happens. It has surprisingly been found that the first section of the material web course immediately following the first deflection arrangement is well suited for the arrangement of at least one drying element, that this section of the material web course designated as the "first section" can thus serve as a drying section or drying section.
  • a non-contact deflection arrangement does not limit a section of the material web course in this definition, which is to be considered primarily, and can accordingly be arranged, for example, in the middle of such a "section of the material web course".
  • a contactless deflection arrangement can subdivide such a portion of the material web course bounding on the input side and output side into "subsections" of the material web course, namely into a subsection between the input contacting deflection arrangement and the contactless deflection arrangement and a subsection between the web non-contact deflection arrangement and the output side contacting diverter.
  • subsections of the material web course
  • an essential subsection of such a section of the material web course runs along or through a non-contact deflection arrangement, so that this subsection makes up the largest part of the entire section.
  • the material web be fed after deflection in the course of and / or at the end of the application section of the drying device of the drying section (s) subjected to the heat of application the heat action of the drying device on the application medium begins on a lower level with respect to the application section.
  • the material web in the drying section or after the deflection by the first deflection arrangement and - in the case of a further deflection of the material web in the direction of the material web before this further deflection - substantially vertically downwards or a larger moving velocity component in the vertical direction down than before the deflection having the or at least one non-contact, the application medium undergoing heat application drying device happens.
  • Such a configuration of the machine is particularly preferred such that the material web, in the first section of the material web course immediately following the first deflecting arrangement, extends at least initially substantially vertically downwards or has a movement speed component which is larger in the vertical direction than in the horizontal direction.
  • the material web in the drying section or after the deflection by the first deflection arrangement, and - in the case of a further deflection in the direction of the material web further deflection of the web prior to this further deflection - substantially vertically downwardly extending or vertically downwards greater movement velocity component than in the horizontal direction having the or at least one non-contact, the application medium of a heat-applying undergoes drying device.
  • section or partial section of the material web course after the deflection arrangement is preferably used at the end of the application section as a drying section, in which the material web moves downwards and still does not undergo a renewed deflection.
  • the material web in the drying section or in the first section of the material web course following immediately after the first deflecting arrangement and / or in a second section of the material web course adjoining this after a second deflecting arrangement pass a non-contact deflection arrangement which surrounds the material web by at least one deflection angle deflects such that the material web at least in a material web exit region of the non-contact deflection arrangement extends substantially vertically upward or has a greater moving velocity component in the vertical direction upward than before the deflection by the non-contact deflection arrangement or has a larger moving velocity component in the vertical direction up than in the horizontal direction.
  • the first section of the material web course can thus extend along and beyond the contactless deflection arrangement.
  • the or a further non-contact deflection arrangement in one on the first portion of the Material web course is arranged subsequent second section of the material web course.
  • the second deflection arrangement is arranged adjacent to an input of the contactless deflection arrangement and deflects the material web in such a way that the material web after the deflection by the second deflection arrangement initially runs essentially vertically downwards or initially after a larger movement velocity component in the vertical direction below as before the deflection by the second deflection arrangement, or initially has a vertically greater downward movement velocity component than in the horizontal direction.
  • non-contact deflection arrangement is proposed as particularly preferred that this is designed as a non-contact, the application medium of a heat-applying drying device or at least one non-contact, the application medium subjected to a heat drying device so that the applied application medium during deflection of a drying action is awakeziehbar.
  • a defined by the Umlenkanowskiowski "deflection" can thus serve as a drying section. It may be the first drying section after the curtain application or another, for example, second drying section act according to the curtain order.
  • the drying section provided by the deflection arrangement or its at least one drying device make up a major part of the first section of the material web course, which is preferably deflected by more than 90 °, most preferably by approximately 180 °, by the non-contact deflection arrangement and then expediently one can pass another deflection.
  • the material web after the deflection by the non-contact deflection substantially vertically upward or at least a larger moving velocity component in the vertical direction upward than before the deflection by the non-contact deflection or at least one vertically upward movement speed component than in the horizontal direction having the or at least one non-contact, the application medium of a heat undergoing drying device happens.
  • the material web after the deflection by the non-contact deflection arrangement and passing a third Deflection arrangement in a subsequent thereto third section of the material web course at least one non-contact, the application medium undergoing heat application drying device happens.
  • the third deflection arrangement is arranged adjacent to an output of the contactless deflection arrangement and deflects the material web in such a way that the material web after the deflection by the third deflection arrangement extends essentially vertically upward or a larger movement velocity component in the vertical direction upwards than before the deflection by the third deflection arrangement or has a vertically higher upward movement speed component than in the horizontal direction.
  • the drying section realized after the non-contact deflecting arrangement or the third deflecting arrangement by arranging the drying device may be the first or a further, for example second or third, drying section after the curtain application.
  • sections or subsections of the material web course before and after the contactless deflection arrangement have a guidance of the material web which is essentially parallel to one another provide.
  • a deflection realized by a respective contacting or non-contact deflection arrangement can take place in one or more stages, that is to say in a deflection angle or in several deflection angles resulting in an overall deflection angle.
  • the first deflection arrangement comprises a first deflection roller or a plurality of first deflection rollers, by means of which the material web is deflected by a first deflection angle or by a plurality of deflection angles to achieve a first overall deflection angle
  • the second deflection roller Deflection arrangement comprises a deflection roller or a plurality of deflection rollers, by means of which the material web is deflected by a second deflection angle or by a plurality of deflection angle to achieve a second overall deflection angle
  • the third deflection arrangement comprises a third deflection roller or a plurality of third deflection rollers, by means of the Material web is deflected by a
  • the machine may also contain several curtain coating units that passes the web.
  • the at least one curtain applicator preceding or following the web passes at least one further curtain applicator, which is the application medium from at least one discharge opening, in particular from a slot or Gleit Anlagendüse, in the form of a single or multi-layer curtain under the influence of gravity and possibly influence further forces towards the associated, the same or - preferably - another surface of the material web emits in a further order section of the material web course.
  • the further application section extends substantially horizontally or curved in accordance with a radius of a deflection and support roller of the curtain applicator or has at least one horizontally greater movement speed component than in the vertical direction, wherein the material web in at least one subsequent order section subsequent drying section of the material flow at least one non-contact passing the application medium under a heat-applying drying device to at least partially dry the applied application medium; and wherein the material web in the course and / or at the end of the further order section is deflected by at least one deflection angle by a further first deflection arrangement such that the material web after the deflection at least in a further first section of the material web course immediately following this deflection initially substantially vertically downwardly or has a greater moving velocity component in the vertical direction down than before the deflection. It can therefore be provided on the same material web surface or a separate order on both surfaces (front and back) of the material web, a multi-stage medium order.
  • the application media used in the case of multi-layer application can be of the same, but preferably of a different kind, e.g. Thickness, coating color etc.
  • the invention can be realized with its training proposals. It is therefore proposed according to the invention that the further first section of the material web course directly following the deflection during the course and / or at the end of the further application section is a further drying section in which the material web or at least one contactless further drying device subjecting the application medium to a heat action happens. Alternatively or additionally, it is proposed that after the deflection during and / or at the end of the further application section the material web is fed to a further drying device which subjects the application medium to a heat input to a further drying section such that the heat action of the further Drying device begins on the application medium on a relation to the other order section deeper level.
  • the material web course after the deflection in the course and / or at the end of the other order section, in particular in the other first section and optionally in a subsequent second section and / or further third section of the material web course the teaching of the invention and corresponds to the training suggestions given above.
  • sections or subsections of the material web course after the application section and after the further application section provide movement speed components of the material web in mutually opposite horizontal directions.
  • the beginning of the dry stretch as close as possible to move to the point of the application medium order (color order), for which the web is deflected downwards after the curtain application.
  • the beginning of the drying is lower than the point of impact of the application medium.
  • the material web is then preferably deflected by at least about 90 ° and preferably by about 180 °.
  • Fig. 1 shows an example of a curtain coater 10 (also called a “curtain coater”, also often abbreviated CC) having a curtain applicator head 12 to which is applied a liquid application medium, for example a coating color, which takes the form of a under the influence of gravity downwardly moving curtain or veil 14 on a preferably at least approximately horizontally extending application section 16 of the web 18 is applied.
  • a liquid application medium for example a coating color
  • the material web is drawn with a pulling group 32 through the applicator, in particular coater.
  • the material web 18 is fed to the applicator unit in the exemplary embodiment via a plurality of deflection rollers, wherein the deflection rollers 20 and 22 define the application section 16.
  • the material web in particular a paper or board web, deflected downward and then passes immediately into a first dryer 24.
  • a hot air dryer the hot air at least against the application medium carrying web surface, preferably against both web pages, blowing.
  • the dryer can be designed so that tuyeres and suction zones alternate and a recirculation mode is realized in the water-laden air sucked between hot air nozzles (exhaust air AL or A) and blown after drying as supply air (supply air ZL or Z) again against the web.
  • the web is finished in a further hot air dryer 30, which can also operate on the circulating air principle. Until finished drying, the coated side becomes the web not touched with deflecting rollers or pulleys. Via further deflection rollers and the pulling group 32, the material web is then fed to further processing or processing, for example a further coating unit, which applies to the same or the opposite material web side.
  • One or both dryers can also be designed as infrared radiation dryers.
  • the upper side of the material web in particular the paper web, is coated with a curtain applicator 10, which has the curtain application head 12, which applies to the application section of the material web 18.
  • the material web is deflected obliquely downwards by the deflection roller 22 and then passes immediately into a first dryer, in particular hot-air dryer 24. After passing through the dryer 24, the web is moved over the coated side by means of a non-contact deflection arrangement, for example a so-called Airturn ("AT"). ) 40, deflected by about 180 °.
  • the Airturn 40 does not damage the surface of the web that is still wet by brushing, since the web is supported and deflected on an air cushion.
  • a train group 32 pulls the web through the machine.
  • the material web 18 is shown after the train group 32 Fig. 2 a second curtain applicator with curtain application head 12 ', which in the order section 16' again on the same web page page as the curtain applicator 10 applied.
  • a second curtain applicator with curtain application head 12 ' which in the order section 16' again on the same web page page as the curtain applicator 10 applied.
  • the other material web side could be provided between the train group 32 and the commissioned work 10 'a web turning device.
  • Fig. 3 shows one with Fig. 2 certain similarities, the third embodiment.
  • the curtain application head 12 of the curtain applicator 10 also applies to the substantially horizontally extending application portion 16 of the web 18, and the web is then deflected by the deflection roller 22 obliquely downwards.
  • the dryer in particular hot air dryer 24, however, a non-contact deflection arrangement, for example, an Airturn 40, downstream, which deflects the web over the coated side upwards, so that, for example, results in a nearly vertical material web course. After this deflection, the material web thus enters the first dryer, in particular hot-air dryer 24.
  • Both in the case of Fig. 2 as well as in the case of Fig. 3 may correspond to the second commissioned work 10 'following arrangement of dryers of the respective first commissioned work 10 following arrangement of dryers.
  • Fig. 4 shows a fourth embodiment, which concretely shows a double-sided curtain application to the web 18.
  • the curtain applicator 10 carries in the order section 16 on the top of the material web, in particular paper web on.
  • the web is deflected obliquely downward and passes through the dryer, in particular hot air dryer 24.
  • the web over the still moist top by means of the Airturns 40 obliquely upwardly deflected, with the input side and output side of the Airturns 40 each a stronger down deflecting pulley 50a or back to a sloping path deflecting pulley 50b may be arranged.
  • the web After the deflection, the web is dried in an obliquely upwardly extending path section through the second dryer, in particular hot-air dryer 30.
  • the train is maintained by the train group 32.
  • the web By arranged before and after the train group pulleys, the web is deflected by more than 90 °, preferably 180 °, so that the web changes its direction and then in the order section 16 'the underside of the web by means of the curtain applicator head 12' of the curtain Order 10 'is deleted.
  • This application section of the material web is defined by corresponding deflection rollers 20 'and 22'.
  • the deflection roller 22 ' deflects the material web obliquely downwards, and then follows an arrangement according to the first application work corresponding arrangement of a first dryer 24' and a second dryer 30 'and provided therebetween deflection devices, namely the Airturn 40' upstream pulley 50a and downstream pulley 50b.
  • the drying of the bottom is thus carried out in a geometric arrangement analogous to the drying of the top.
  • Fig. 5 shows a fifth embodiment, in which the Application section 16 subsequent, limited by the guide rollers 22 and 62 web portion 58 is a deflection section and at the same time a drying section in which the material web on the one hand by a non-contact deflector hot air dryer 60 by more than 90 °, in the case of the embodiment by about 180 °, after deflected above and on the other hand is dried during this deflection by the hot air applied to the coated side of the web.
  • the material web 18 has been deflected by the deflection roller 22, the web immediately reaches the area of influence of the deflection and drying device 60. It is a one-sided dryer which applies only hot air to the coated side of the web.
  • the trajectory in or along the dryer is curved with a radium R.
  • the web is deflected by at least 90 °, preferably by more than 90 °, and most preferably - as in the embodiment - by about 180 °.
  • the dryer 60 may be configured to alternate along the curved contour blowing nozzles and suction zones, as in a detail of the overall illustration according to Fig. 5a) pointing part figure 5b) indicated.
  • blowing nozzles 64 and intermediate suction zones are designated 66.
  • the tuyeres blow hot air against the web.
  • the water laden air is between the Suction nozzles sucked, so that the dryer can work properly according to the recirculation principle.
  • the embodiment of Fig. 6 differs from the embodiment of Fig. 5 essentially in that the material web 18 is dried from both sides.
  • the hot-air drying device thus has, in addition to the dryer 60, a dryer arrangement acting on the other material web side, in the present case two successive dryers 70 and 72, which blow hot air against the uncoated side of the material web.
  • the execution of the outer part of the drying device in several parts or individual dryers has the advantage that the assembly is facilitated.
  • the dryers can be opened for cleaning.
  • Each part of the dryer or each dryer preferably has a supply air and an exhaust air manifold and works according to the recirculation principle.
  • FIGS. 5 and 6 appear particularly advantageous because on the one hand a very compact overall arrangement is achieved and on the other hand, the material web is dried immediately after painting.
  • Fig. 7 shows in the subfigures 7a), 7b) and 7c) typical solutions of State of the art for the arrangement of dryers following a curtain applicator.
  • the same reference numerals are used as in the embodiments according to the invention.
  • Fig. 7b is not applied to a running between two pulleys rectilinear material web section, but on a curved by a deflection and support roller material web section, which is also in a machine according to the invention into consideration.
  • Fig. 8 shows typical examples of known arrangements of a contacting coater with subsequent drying equipment. These are shown only for the sake of completeness, since due to completely different conditions little can be derived from such contacting coating machines for non-contact curtain coating machines.
  • Fig. 8a) and Fig. 8b ) show known solutions for blade or knife coaters in which applied by an applicator 80 in excess and then then to adjust the correct dosage by a doctor device 82 excess application medium by means of, for example, a blade again removed.
  • 84 denotes a gas infrared drier to which gas is supplied for operation.
  • 86 each denotes a hot air dryer, wherein in the case of Fig. 8b ) is deflected by means of an Airturns 88 on the coated side, then in the Hot air dryer 86 ready to dry.
  • Fig. 8c shows an example of a film coating arrangement 90, which applies the two-sided dosing onto the material web in contact with it.
  • a first hot air dryer 86 follows after a deflection by an Airturn 88.
  • a second hot air dryer 87 follows after another, this time touching diverter.
  • a section of the material web course immediately following a deflection arrangement of the application section which deflects the material web downwards be a drying section in which the material web is at least a non-contact, the application medium of a heat undergoing drying device happens.
  • the material web is fed after the deflection in the course and / or at the end of the application section of the drying device of a drying section such that the heat action of the drying device begins on the application medium on a lower level compared to the order section.

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  • Coating Apparatus (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
EP09168055A 2008-08-21 2009-08-18 Dispositif d'application de rideau Revoked EP2157240B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008041418A DE102008041418A1 (de) 2008-08-21 2008-08-21 Vorhang-Auftragsmaschine

Publications (3)

Publication Number Publication Date
EP2157240A2 true EP2157240A2 (fr) 2010-02-24
EP2157240A3 EP2157240A3 (fr) 2010-11-24
EP2157240B1 EP2157240B1 (fr) 2012-11-28

Family

ID=41416031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09168055A Revoked EP2157240B1 (fr) 2008-08-21 2009-08-18 Dispositif d'application de rideau

Country Status (3)

Country Link
US (1) US20100043700A1 (fr)
EP (1) EP2157240B1 (fr)
DE (1) DE102008041418A1 (fr)

Cited By (1)

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WO2012013384A1 (fr) * 2010-07-28 2012-02-02 Voith Patent Gmbh Procédé de fabrication d'une bande de matière fibreuse, en particulier d'une bande de papier ou de carton

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DE102008041419A1 (de) * 2008-08-21 2010-02-25 Voith Patent Gmbh Vorrichtung zur Erzeugung von beschichteten Papier-, Karton- oder anderen Faserstoffbahnen mit zumindest einer thermosensitiven Schicht und Verfahren zum Betreiben einer derartigen Vorrichtung
DE102011075139A1 (de) 2011-05-03 2012-11-08 Voith Patent Gmbh Verfahren zur Herstellung einer gestrichenen Faserstoffbahn
CN104244609B (zh) * 2013-06-19 2018-04-06 南昌欧菲光科技有限公司 基材双面塞孔装置
JP6272138B2 (ja) * 2014-05-22 2018-01-31 東京エレクトロン株式会社 塗布処理装置
EP3988713B1 (fr) * 2020-10-23 2023-11-01 Valmet Technologies Oy Procédé de traitement d'une bande de matière fibreuse et système de traitement pour le traitement d'une bande de matière fibreuse
DE202021106842U1 (de) 2021-01-29 2022-01-28 Voith Patent Gmbh Vorrichtung zum Aufbringen wenigstens einer Schicht auf eine Faserstoffbahn
US12599929B2 (en) 2021-02-12 2026-04-14 Johnson Matthey Public Limited Company Powder spraying system, powder spraying nozzle and method

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Also Published As

Publication number Publication date
EP2157240A3 (fr) 2010-11-24
EP2157240B1 (fr) 2012-11-28
US20100043700A1 (en) 2010-02-25
DE102008041418A1 (de) 2010-02-25

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