EP1541765A1 - Dispositif de revêtement - Google Patents

Dispositif de revêtement Download PDF

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Publication number
EP1541765A1
EP1541765A1 EP04105788A EP04105788A EP1541765A1 EP 1541765 A1 EP1541765 A1 EP 1541765A1 EP 04105788 A EP04105788 A EP 04105788A EP 04105788 A EP04105788 A EP 04105788A EP 1541765 A1 EP1541765 A1 EP 1541765A1
Authority
EP
European Patent Office
Prior art keywords
material web
shielding element
running surface
shielding
running
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
EP04105788A
Other languages
German (de)
English (en)
Other versions
EP1541765B1 (fr
Inventor
Benjamin Méndez
Manfred Ueberschär
Bernd Bohnenkamp
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
Voith Paper 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
Application filed by Voith Patent GmbH, Voith Paper Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1541765A1 publication Critical patent/EP1541765A1/fr
Application granted granted Critical
Publication of EP1541765B1 publication Critical patent/EP1541765B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 device for one or two-sided application of liquid to pasty application medium, in particular aqueous pigment suspension, on a running surface, the surface on direct order the Surface of a material web, in particular a paper or board web is and for indirect order, the surface of a transfer element, for example an order tape is, which then the application medium to the surface of the Material web transmits, with aratitechnik, being in the running direction of the current Surface in front of the commissioned work an air boundary layer fighting device is arranged.
  • liquid to pasty application medium in particular aqueous pigment suspension
  • the invention will be described below using the example of a curtain applicator described.
  • the application medium for example, pigmented coating color or Glue or starch, as a gravity-moving curtain (Curtain) to the running surface.
  • curtain coating This technique is referred to in the art as curtain coating, with the order done without excess of medium. That is, it is only so much medium applied, as in the end to remain on the web.
  • Modern machines for producing and / or finishing a material web, in particular a paper or board web have economy reasons now widths of up to 10 m and more on and are high Driven speeds of about 2000 m / min.
  • DE-A1 10012257 a device for weakening the entrained by the running surface air boundary layer is known.
  • both a suction device, elastic scrapers, brushes, a blowing device, an electrode assembly and an ultrasonic source are used alternately.
  • this DE-A1 describes that the air boundary layer weakening device is designed as a sealing element, wherein this sealing element is pressed against the running surface and rolls on this substantially slip-free.
  • a strip extending in the transverse direction of the running surface is provided which precedes the weakening or Berithmfungs owned and the removal of the uppermost layers of air over the running surface is used, which is to be relieved, in particular, the downstream attenuator in their work.
  • an air boundary layer weakening device at least one, in the transverse direction of the current Surface-extending, strip-shaped shielding is assigned.
  • This shielding element is associated with that area to which the current Surface or the running material web to the commissioned works. At a Curtain-commissioned work becomes direct and free fall curtain particularly effectively protected against the influence of harmful air boundary layers.
  • a rolling on the running surface or the material web element For example, a roller selected, it is appropriate this element or this Chrome plating. This will provide a smooth surface suitable for unrolling created.
  • an outer surface may be provided, the one Hardness of more than 90 Pussey ⁇ Jones and therefore is very soft. In particular, this results in a better sealing effect on rough track surfaces achieved.
  • the at least one further shielding element is particularly expedient for the at least one further shielding element to be arranged parallel to and at a small distance from the running surface, since this precludes the formation of air turbulence.
  • a distance of the shielding to the running surface of 0 to 5 mm, preferably 0.5 to 1 mm most effective. The distance can also be quite 0.
  • Very useful is a design such that the shielding in a Angle ⁇ is arranged to the running surface, which is about 0 to 5 °, preferably 2 ° and towards the attenuator or a previous one Shielding element diverges towards the running surface.
  • a further embodiment of the invention may also consist in that the shielding element or at least one further shielding element is arranged within the space which exists between the applicator unit and a material web tapering from above from the control or weakening device.
  • an angle of inclination ⁇ is advantageous for creating an effective shielding. This can be about 45 °. As a result, a barrier is created which counteracts the penetration of the air boundary layer.
  • the weakening or fighting device or an adjacent shielding element facing the end of the strip-shaped shielding element is adapted to the outer contour of the attenuation or control device or the previous shielding. This ensures that the air boundary layer can not rebuild in the remaining gaps.
  • the attenuation or control device it is expedient if it is designed as a sealing element pressed against the running surface or the material web and rolling on this slip-free rolling element.
  • This element acts as a fixed point for the material web in direct order and can also serve as a deflecting element for an incoming from above material web or the running surface.
  • the running surface would be an endless circulating belt, which then transfers the medium applied to its surface to the web of preferably paper or cardboard.
  • This type of order is known as an indirect order.
  • the rolling sealing element can be equipped very advantageously with a suction zone for the flowing air boundary layer. In addition, it can also serve as grounding in electrostatic charging of the running surface material web.
  • Another very advantageous embodiment of the invention may be that the shielding element for a the commissioned work and / or the weakening or Extinguishing device at least partially enclosing shield expandable is.
  • This will be optimal conditions in the surrounding area of the commissioned work created, on the one hand, the climatic conditions in terms of a improve uniform media order and on the other hand also protect the Provide environment before ejectingtechnologymedieteilchen. In addition, will also the noise protection improved.
  • the device according to the invention can be structurally simplified, by at least one shielding element as an integral part of the existing Berithmfungs worn or the previous module is formed.
  • Another advantageous solution is that the running surface or the running material web in the direction of the commissioned work one at an angle ⁇ of 5-30 °, but preferably 5-15 °, rising or at an angle ⁇ of 5-30 °, but preferably 5-15 °, sloping course decreases.
  • the object of the invention is also achieved in that a transversely the running surface extending, strip-shaped shielding the Commissioned work is subordinate. Quite surprisingly it turned out that one Arrangement after the commissioned work creates a calming zone in which no unwanted air currents occur and thereby the application medium undisturbed can be applied to the surface to be coated. This is especially true high-speed machines make sense, because here behind the commissioned work again Air boundary layers can build.
  • the device according to the invention can preferably be used for a so-called Curtain Coater (Curtain Coater), which the application medium as in the Essentially gravity-related moving, free-falling curtain or veil to the running surface.
  • Curtain Coater Cosmetic Coater
  • Such a curtain is at wide (about 10 m and more) and fast running (approx. 2000 m / min) machines are particularly difficult to keep stable and even, because Among other things, he is very much exposed to the influence of the air boundary layer.
  • the influence of the air boundary layer can be successfully minimized when the Distance between the shielding element and the delivered curtain only 3 to 60 mm, preferably 20 to 40 mm.
  • the device according to the invention is characterized by low Production costs. Another advantage is the retrofitting of existing ones Coating lines with the device according to the invention, because a problem-free Adapt to existing machine sizes and the distances contained therein between individual components is possible.
  • Figures 1 to 13 a rough schematic side views of various embodiments of the device according to the invention
  • an applicator device is designated by 1. It comprises a curtain applicator 2 whose dispensing nozzle 3 delivers the desired application medium M as a curtain 4 to a surface O which moves in the running direction L.
  • the surface O relates to a web of paper or cardboard 5, which is coated in a direct manner and on at least one web page, the application medium M, for example, aqueous coating color, hangs up as a coating layer 6.
  • a fighting or weakening device 7 is arranged. This could for example be designed as a suction box. In the example shown, however, a roller rolling on the running surface O or the running material web 5 is selected.
  • the roller or control device 7 (hereinafter referred to as “roller” or “device” 7) squeezes off the incoming air boundary layers L G, so to speak, and at the same time forms a fixed point for the material web, which has a positive effect on the running behavior of the material web running in the running direction L. Paper or cardboard.
  • the roller 7 can also be equipped with a suction zone S for additional removal of the harmful air, as Figure 2 shows.
  • the roller 7 can also be used as a grounding E when, for the electrostatic charging of the running surface O or the material web 5, an electrode arrangement 14 is provided on its opposite side of the web, which also influences the air boundary layer L G minimizes.
  • FIG. 1 shows that at least one strip-shaped shielding element 8a of the device 7 is connected upstream in order to improve the control effect against the air boundary layer L G.
  • at least one further strip-shaped shielding element 8b is provided in the running direction L immediately in front of the curtain 4, that is to say as the last element in front of the curtain 4.
  • This shielding element 8b is arranged on the side of the web to be coated and, like the shielding element 8a, also extends parallel and transversely - ie orthogonally to the running direction L of the running surface Obw.
  • the material web 5. Its length is adapted substantially to the distance between the roller 7 and the curtain 4. An enlarged view thereof is shown in FIG . 4 .
  • the shielding element 8b is inclined at an angle ⁇ with respect to the surface O or the material web 5 running approximately horizontally in this region, where ⁇ is up to 5 °, preferably up to 2 °.
  • the remaining to the running surface O or the web 5 gap b is extremely low, so that although low air turbulence of the entrained air boundary layers still exist, but lose their dangerous effect on the curtain 4.
  • the arrangement is such that the gap b diverges in the direction of the device 7 and increases toward the curtain 4.
  • the shielding element 8b can be suspended suspended.
  • the strip-shaped shielding element 8b is fastened to a support body 9.
  • the support body 9 is mainly used to ensure the rigidity of the shielding 8b, which is necessary especially for wide machines.
  • the support body 9 may extend to the height of the applicator head of the commissioned work 2 in order to simultaneously protect the curtain over its entire height against air currents can. He thus exercises a dual function, namely stiffening and shielding.
  • FIG. 5 shows in a further variant that this support body 9 is arranged at a minimum distance z from the curtain applicator unit 2.
  • this support body 9 forms with the shielding element 8b a shielding unit 10, which can thus be moved independently of the vertical or longitudinal adjustment of the applicator unit 2 and can be installed and removed.
  • a shape of the front wall surface adapted to the roller 7 forms a guide surface 10a for the air masses squeezed by the roller 7 and to be discharged from the device 1.
  • FIG. 5 also shows a shielding element 8c in dashed form. This shielding element 8c may optionally be present at the side of the material web 5 or the running surface O running away from the curtain, in order to protect the curtain 4 from undesired air flows.
  • this vertically arranged element 8c is provided above all in high-speed paper and / or coating machines, which today are operated for economic reasons at about 2000 m / min.
  • the shielding element 8c as well as the shielding element 8b or supporting body 9 or shielding assembly 10 is arranged at a minimum distance from the curtain 4, but leaves a viewing gap w to the running surface O or the material web 5 for the operator to observe the curtain application free.
  • Double arrows in FIGS. 4 and 5 show the adjustability of the shielding element 8b in the horizontal and vertical directions or for tilting in order to set the angle of attack ⁇ already described. Also, the adjustment of the commissioned work 2 is shown with double arrows.
  • the applicator 2 or the applicator head with application nozzle can be adjusted and / or pivoted in the horizontal, vertical or oblique direction, which is necessary in particular for setting up the start or stop position.
  • the distance b between the shielding element 8b and the running surface O or the material web 5 is very minimal and less than 10 mm.
  • the distance b is only up to 2 mm, but most preferably only 0.5 to 1 mm. This small distance is sufficient to keep the unwanted air turbulence low, so that air boundary layers L G kept away from the curtain 4, but at least their harmful influence is minimized. It is also possible to touch the running surface 0 or the material web 5.
  • the end of the shielding element 8b extends into the gusset of the roller 7.
  • the end of this shielding element (as well as the end of the shielding element 8a in FIG. 1) or its one end face is adapted to the outer contour of the roller 7.
  • the outer contour is analogously adapted to a subsequent shielding element 8d provided between shielding elements 8a and 8b, as FIG. 6 shows.
  • This variant is suitable above all for slower and less wide machines with consequently less wide material webs 5 to be produced.
  • FIG. 7 shows a further embodiment of the device 1 according to the invention.
  • a shielding element 8e is arranged in the space R between the applicator 2 and the roller 7.
  • an angle of inclination ⁇ is advantageous for creating an effective shielding.
  • This angle ⁇ is in the example about 45 °.
  • a barrier is created against the penetration of the air boundary layer L G into the space R toward the application area, especially when the material web 5 tapers from above to the applicator unit 2.
  • FIG. 8 shows a further embodiment variant in which, in addition to the inclined shielding element 8e located in the space R, the shielding element 8b shown in FIGS. 1, 4, 5 is also present and as a result of which the control effect is markedly increased.
  • FIG. 1 Another very advantageous embodiment variant is shown in FIG .
  • the shielding element 8b and with further shielding elements 8a, 8c, 8f and 8g to a device or roller 7 box-like, at least partially enclosing shield 11 expandable.
  • a suction device 13 is arranged within the enclosing shield 11. This suction device can alone or together with the suction zone S in the roller 7, the disturbing air aspirate.
  • the shielding element 8a has been omitted, and for this the supporting body 9 (see FIGS. 4 and 5) for supporting the shielding element 8b is present.
  • the individual shielding elements 8f, 8g and 8b and, as well as the support body 9 also form a shield, which is denoted by 15.
  • a shield in the region of the roller 7 is also to be created, wherein again a suction device 13 may be arranged in the space R.
  • Figure 11 is intended to indicate that the shielding element 8a is even expandable with horizontally and vertically or arcuately arranged shielding parts 8h such that the entire device 1 is hood-like in an almost closed climatic chamber 16.
  • the extension is possible on both sides of the running material web 5.
  • the installation of the suction device 13 shown in FIGS. 9 and 10 is advantageous. Instead of sucking, with a device 13a and the supply of a medium in the chamber 15 or in space R in Figure 9 and 10 possible, whereby specially desired climatic conditions within the climate chamber formed are adjustable.
  • steam could be fed in, which ensures that the application medium M or the application layer 6 on the material web 5 does not harden so quickly and thus becomes more uniform.
  • Figure 11 also is a still, located in close proximity to this shielding member disposed 8c after the curtain 4, which is also seen from FIG. 5
  • shielding 8a to 8h or the support body 9 can be made of stainless steel or plastic.
  • the latter material is in Connection with electrostatics, as shown in Figure 3, or in a Coronary discharge makes sense.
  • the width B of all shielding elements 8a and 8h correspond approximately to the width of Surface O or the material web 5, but at least the desired Coating width.
  • tapered web 5 is shown, which is coated directly with the discharged from the curtain 4 Medium M (for example pigment-containing pigment dispersion).
  • the material web 5 could also be coated in an indirect manner with the said application medium M, as FIG. 12 shows.
  • This belt 22 receives the application medium M from the curtain 4 and then releases it to the material web 5.
  • an air boundary layer control or attenuation device in the form of a roller 7 is provided, which rolls on the belt 22.
  • the shielding member 8b is provided.
  • FIG. 13 shows that the running surface O or the material web 5 can, in all the variants shown, after passing through the device 7 in the direction of the applicator 2, take a gradient rising or falling at an angle to an imaginary horizontal H.
  • an angle ⁇ of greater than 90 ° is achieved between the curtain 4 and the running surface O or material web 5, whereas with the curve decreasing, the angle ⁇ 'is less than 90 °.
  • a counterforce to the registered air boundary layer L G is formed.
  • the angle ⁇ is also 5-30 °, preferably 5-15 °, as a result of which stretching and thus homogenization of the curtain 4 is achieved.
  • the material web 5 does not have to run vertically correctly when directly applied, but can, as also shown symbolically in Figure 13, also in one Run to other angle of the roller 6.
  • the angle is ⁇ , starting from an imaginary dashed vertical V approximately 30 °.

Landscapes

  • Coating Apparatus (AREA)
  • Massaging Devices (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paper (AREA)
EP04105788A 2003-12-13 2004-11-16 Dispositif de revêtement Not-in-force EP1541765B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358508A DE10358508A1 (de) 2003-12-13 2003-12-13 Auftragsvorrichtung
DE10358508 2003-12-13

Publications (2)

Publication Number Publication Date
EP1541765A1 true EP1541765A1 (fr) 2005-06-15
EP1541765B1 EP1541765B1 (fr) 2007-08-08

Family

ID=34485372

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04105788A Not-in-force EP1541765B1 (fr) 2003-12-13 2004-11-16 Dispositif de revêtement

Country Status (3)

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EP (1) EP1541765B1 (fr)
AT (1) ATE369460T1 (fr)
DE (2) DE10358508A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008336A1 (fr) * 2004-07-20 2006-01-26 Metso Paper, Inc. Unite et procede de couchage par voile
WO2006070065A1 (fr) * 2004-12-31 2006-07-06 M-Real Oyj Produit de papier couche et procede et appareil pour le fabriquer
EP2093325A3 (fr) * 2008-02-19 2010-01-20 Voith Patent GmbH Unité d'application de rideau
EP2085516A3 (fr) * 2008-01-28 2010-01-27 Voith Patent GmbH Dispositif d'amélioration des conditions de travail du personnel de service d'un dispositif de brossage
DE102009008303B4 (de) * 2008-02-11 2010-08-26 Metso Paper, Inc. Verfahren zur Stabilisierung eines Streichvorhangs beim Florstreichen und eine das Verfahren anwendende Vorrichtung
DE112006001484B4 (de) * 2005-06-15 2015-06-18 Basf Se Vorhangbeschichter mit Grenzschichtablösevorrichtung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007026619A1 (de) 2007-06-08 2008-12-11 Voith Patent Gmbh Auftragsvorrichtung
DE102008040402A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
DE102008040414A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
DE102008040405A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
DE102008040404A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
DE102008040419A1 (de) 2008-07-15 2010-01-21 Voith Patent Gmbh Vorhang-Auftragswerk
DE102009046095B4 (de) * 2009-10-28 2016-07-28 Valmet Technologies, Inc. Anordnung zur Kontrolle von den in der Florstreichvorrichtung mit der Bahn geführten Luftströmungen
DE102010001616A1 (de) 2010-02-05 2011-08-11 Voith Patent GmbH, 89522 Auftragsvorrichtung
DE102010041713A1 (de) * 2010-09-30 2012-04-05 Voith Patent Gmbh Vorrichtung zum direkten oder indirekten Auftrag von flüssigem bis pastösem Auftragsmedium und Verfahren zum Betreiben einer derartigen Vorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903559A1 (de) * 1998-01-30 1999-10-21 Mitsubishi Paper Mills Ltd Verfahren und Apparatur zur Vorhangbeschichtung
DE19829449A1 (de) * 1998-07-01 2000-01-05 Voith Sulzer Papiertech Patent Auftragsvorrichtung und Auftragsverfahren
DE10012257A1 (de) * 2000-03-14 2001-09-20 Voith Paper Patent Gmbh Auftragsvorrichtung

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Publication number Priority date Publication date Assignee Title
JP3549075B2 (ja) * 1995-06-02 2004-08-04 三菱製紙株式会社 カーテン塗布装置及び塗布方法
JPH10165868A (ja) * 1996-12-11 1998-06-23 Ricoh Co Ltd 塗工装置
JPH10277458A (ja) * 1997-04-02 1998-10-20 Mitsubishi Paper Mills Ltd 塗布方法及び塗布装置
FI115295B (fi) * 1999-09-01 2005-04-15 Metso Paper Inc Verhopäällystin ja verhopäällystysmenetelmä
JP3676182B2 (ja) * 2000-04-03 2005-07-27 三菱重工業株式会社 塗工装置および塗工方法
JP3848168B2 (ja) * 2001-03-29 2006-11-22 三菱製紙株式会社 カーテン塗布装置
DE10228114A1 (de) * 2002-06-24 2004-01-15 Voith Paper Patent Gmbh Vorrichtung zum beidseitigen Streichen und zum Trocknen einer Materialbahn, insbesondere aus Papier oder Karton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903559A1 (de) * 1998-01-30 1999-10-21 Mitsubishi Paper Mills Ltd Verfahren und Apparatur zur Vorhangbeschichtung
DE19829449A1 (de) * 1998-07-01 2000-01-05 Voith Sulzer Papiertech Patent Auftragsvorrichtung und Auftragsverfahren
DE10012257A1 (de) * 2000-03-14 2001-09-20 Voith Paper Patent Gmbh Auftragsvorrichtung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006008336A1 (fr) * 2004-07-20 2006-01-26 Metso Paper, Inc. Unite et procede de couchage par voile
WO2006070065A1 (fr) * 2004-12-31 2006-07-06 M-Real Oyj Produit de papier couche et procede et appareil pour le fabriquer
DE112006001484B4 (de) * 2005-06-15 2015-06-18 Basf Se Vorhangbeschichter mit Grenzschichtablösevorrichtung
EP2085516A3 (fr) * 2008-01-28 2010-01-27 Voith Patent GmbH Dispositif d'amélioration des conditions de travail du personnel de service d'un dispositif de brossage
DE102009008303B4 (de) * 2008-02-11 2010-08-26 Metso Paper, Inc. Verfahren zur Stabilisierung eines Streichvorhangs beim Florstreichen und eine das Verfahren anwendende Vorrichtung
AT506423A3 (de) * 2008-02-11 2013-04-15 Metso Paper Inc Verfahren zur stabilisierung eines streichvorhangs beim florstreichen und eine das verfahren anwendende vorrichtung
AT506423B1 (de) * 2008-02-11 2015-04-15 Metso Paper Inc Verfahren zur stabilisierung eines streichvorhangs beim florstreichen und eine das verfahren anwendende vorrichtung
EP2093325A3 (fr) * 2008-02-19 2010-01-20 Voith Patent GmbH Unité d'application de rideau

Also Published As

Publication number Publication date
DE10358508A1 (de) 2005-07-07
ATE369460T1 (de) 2007-08-15
EP1541765B1 (fr) 2007-08-08
DE502004004559D1 (de) 2007-09-20

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