EP2067531A2 - Guidage de bord - Google Patents

Guidage de bord Download PDF

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Publication number
EP2067531A2
EP2067531A2 EP08170652A EP08170652A EP2067531A2 EP 2067531 A2 EP2067531 A2 EP 2067531A2 EP 08170652 A EP08170652 A EP 08170652A EP 08170652 A EP08170652 A EP 08170652A EP 2067531 A2 EP2067531 A2 EP 2067531A2
Authority
EP
European Patent Office
Prior art keywords
curtain
edge guide
medium
edge
gleitflüssigkeitsansaugkammer
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.)
Ceased
Application number
EP08170652A
Other languages
German (de)
English (en)
Other versions
EP2067531A3 (fr
Inventor
Takeo Nakazawa
Katsumi Ishizuka
Tadashi Sasa
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
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2067531A2 publication Critical patent/EP2067531A2/fr
Publication of EP2067531A3 publication Critical patent/EP2067531A3/fr
Ceased legal-status Critical Current

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Classifications

    • 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 present invention relates to an edge guide for guiding the edges of a discharged from a curtain applicator, falling curtain for coating a running paper, cardboard or other fibrous web, wherein at each curtain edge, an edge guide is provided, each having an inner side surface which surrounds the edge of downwards flowing curtain leads.
  • Coated paper such as printing paper, pressure-sensitive paper, thermal paper, catalogs, etc.
  • Coated paper is prepared by passing a pre-dried moving web through a coater and then finish drying.
  • Coating machines are conventionally in the form of blade coaters which work with a doctor blade element, such as a blade or doctor blade or an air knife, and which use the method of replenishment. That is, it is here applied to the web application medium in abundance and brought to the required coating weight, which scraped by means of doctor blade, the excess application medium or blown away by means of the air knife.
  • the disadvantages are such that, due to the fluid pressure when the application medium is applied to the web and also due to the pressure force of the doctor blade, a large amount of application medium penetrates into the web and the maintenance costs are high due to the wear of the doctor blade, rod or the like.
  • the excess scrapped medium must be removed, which requires additional effort.
  • curtain coaters have frequently been used to coat the surface of a web of material, ie a paperboard or other fibrous web.
  • a curtain application work coating is done "contactless" and only in quantity, in which the application medium is to remain on the fibrous web. This means that no additional dosage takes place.
  • the curtain coating is carried out in such a way that the relevant application medium is delivered to the moving web by an application head arranged above the web.
  • the at least web-width application head has at least one application medium chamber and at least one likewise web-wide nozzle for dispensing the application medium in the form of a curtain layer.
  • the delivered curtain layer then deposits on the surface of the web as a coating layer.
  • FIG. 5 is a conceptual drawing of such a known edge guide specified.
  • FIG. 5 1 is an application head
  • 2 is the edge guide
  • c is the application medium curtain
  • w is the fibrous web.
  • the edge guide 2 Since the edge guide 2 is made of metal and is hydrophilic, it has the effect of preventing a neck-in. But since the application medium has a viscosity, the flow is hindered by this and the flow velocity v of the curtain c, as seen in the figure, slowly in the vicinity of the edge guide 2. At the different locations from the surroundings of the edge guide 2 there is a uniform flow velocity. In such a condition and when the flow rate is low, it happens that the curtain c moves away from the edge guide 2 and the said undesired neck-in occurs as described above.
  • a lubricating liquid such as water or the like is allowed to flow on the surface of the edge guide 2. In FIG. 3 this is shown. This possibility is also available in the Japanese Patent No. 11-188299 disclosed.
  • FIG. 3 1 means a curtain application head, 2 an edge guide, c an application medium curtain, and w the fibrous web.
  • the edge guide 2 has a porous plate 2g on the inside, and a sliding liquid accumulation chamber 2i supplied with the lubricating liquid j seeps the sliding liquid j through the porous plate 2g.
  • the surface velocity of the leaking liquid layer is at any point equal to the falling velocity of the curtain c.
  • FIG. 4 Another known embodiment of an edge guide is in FIG. 4 shown.
  • On the picture side is a side view and on the right side a front view is shown.
  • reference numeral 2 is the edge guide, with 2a is the gutter opened to the inside, with j is a sliding liquid, such as water or the like, with h is the exhaust gas, with 2b is the Gleit thoroughlykeitsansaughunt, with 2e is the suction port and with 2d the Gleit deviskeitspassage, the groove 2a, the lubricating fluid feeds j.
  • the invention has for its object to provide an edge guide for a curtain applicator, which does not have the disadvantages of the prior art.
  • the object is achieved in that the inner side surface of the edge guide in each case has a channel for the passage of a lubricating liquid, wherein the edge guide and a Gleit thoroughlykeitsansaughunt, which is equipped with a suction port for sucking the lubricating liquid.
  • a medium suction chamber disposed below the sliding liquid suction chamber.
  • the medium suction chamber has a medium suction port which is disposed near the Gleit thoroughlykeitsansaugö réelle and in the direction of preferably with High-speed moving fibrous web is open and sucks the application medium
  • the edge guide according to the invention even if at the bottom of the channel through the Gleit thoroughlykeitsansaughunt the lubricating fluid is sucked and the edge of the curtain away from the edge guide even at high-speed moving fibrous webs no Neck-in occurs and the curtain is surprisingly stable. There are also no edge thickening of the applied to the fibrous web application medium.
  • the negative pressure of the medium suction chamber is higher than the negative pressure of the Gleit crampkeitsansaughunt.
  • the application head 1 dispenses a coating medium curtain c, which essentially flows down on a substrate to be coated in accordance with gravity.
  • the substrate is a high speed moving fibrous web.
  • edge guides 2 To guide the edge of the curtain c a pair of edge guides 2 is present (that is, per curtain side, an edge guide 2, wherein in the FIG. 1 only one side, ie only one edge guide is shown.
  • a narrow groove 2a is provided through which the sliding fluid j flows.
  • the flow of the application medium is improved on the guide surface of the edge guide.
  • 2d is a lubricating liquid supply passage (see horizontal arrow) which receives the lubricating liquid j and leads to the upper edge of the groove 2a.
  • This Gleit crampkeitsansaughunt 2b has a Gleit thoroughlykeitsansaugö réelle 2e, which in turn is open to the channel bottom and in the vicinity of the lower edge of the channel 2a and mainly sucks the sliding liquid j.
  • the sliding liquid suction port 2e is a medium suction chamber provided below the sliding liquid suction chamber 2b and having the medium suction port 2f.
  • the medium suction port 2f is the substrate to be coated, i.
  • the sliding liquid suction port 2e mainly sucks the application medium.
  • the negative pressure of the sliding liquid suction chamber 2b and the negative pressure of the medium suction chamber 2c are each extra regulated, but usually the degree of vacuum of the medium suction chamber 2c is regulated to be higher than the degree of vacuum of the sliding liquid suction chamber 2b.
  • FIG. 2 is for understanding a side view of the entire curtain applicator 10 with the edge guide according to the invention FIG. 1 shown.
  • d means a plate for the insulation of the air flow flowing with the high-speed fibrous web w.
  • e a basin is called, which absorbs in the state before the start of normal operation in which the fibrous web w does not undergo, the effluent from the application head 1 application medium t (in particular coating color) and collects, whereas with r a web guide and with the s the fibrous web w applied medium layer is designated.
  • the edge portion of the curtain c is strongly sucked by the medium suction chamber 2c until it reaches the fibrous web w, no constriction of the curtain c occurs.
  • the curtain c is stable. In addition, an edge thickening of the application layer s is avoided.
  • the present invention is not limited to the embodiment described above, and unless otherwise departing from the gist of the invention, many changes are possible.
  • the application medium curtain c is dispensed from a curtain head 1 and is a simple curtain.
  • a curtain consisting of several layers as exemplified in the FIG. 6 is specified.
  • Fig. 6 shows a partial sectional drawing of the coating device of a curtain applicator for two layers. This version is from the JP Publication No. 2006-247611 known. In such an embodiment, the present invention is also applicable.
  • the curtain applicator for two layers has the two curtain heads 1a and 1b which discharge the application media ta and tb flowing through the inside of the slits da and db, respectively, downwardly.
  • the guide plate B is present, on which the output from the applicator application media ta and tb one after another on the inclined plane Ba superimpose. Subsequently, this double medium layer falls from the curtain guide part Bb at the lower edge part of the inclined plane Ba as medium curtain ca, cb on the surface of the fibrous web w.
  • the edge guide 2 of the present invention should be arranged such that the upper edge of the edge guide 2 of the present invention impinges on the lower edge of the curtain guide part Bb.

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  • Coating Apparatus (AREA)
  • Paper (AREA)
EP08170652A 2007-12-05 2008-12-04 Guidage de bord Ceased EP2067531A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007314884A JP5228227B2 (ja) 2007-12-05 2007-12-05 カーテンコータのエッジガイド

Publications (2)

Publication Number Publication Date
EP2067531A2 true EP2067531A2 (fr) 2009-06-10
EP2067531A3 EP2067531A3 (fr) 2010-03-10

Family

ID=40602679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08170652A Ceased EP2067531A3 (fr) 2007-12-05 2008-12-04 Guidage de bord

Country Status (2)

Country Link
EP (1) EP2067531A3 (fr)
JP (1) JP5228227B2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012004875B3 (de) * 2012-03-10 2012-07-19 Andritz Küsters Gmbh Vorrichtung zur Vorhangbeschichtung einer laufenden Warenbahn
DE102014013996A1 (de) 2014-09-25 2016-03-31 Andritz Küsters Gmbh Verfahren und Vorrichtung zur Vorhangbeschichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5720139B2 (ja) * 2010-08-09 2015-05-20 株式会社リコー カーテン塗布装置及びカーテン塗布方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11188299A (ja) 1997-10-03 1999-07-13 Troller Schweizer Eng Ag 移動支持体をカーテンコーティングする方法および装置
JP2006247611A (ja) 2005-03-14 2006-09-21 Voith Paper Patent Gmbh 塗工装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07113068A (ja) * 1993-10-15 1995-05-02 Nitto Denko Corp 放射線硬化型粘着テ―プの製造法
EP0649054B1 (fr) * 1993-10-18 2001-04-25 Eastman Kodak Company Appareil et méthode pour réaliser une bordure de guidage interne en forme de bande
US5390900A (en) * 1994-04-26 1995-02-21 Int Rolling Mill Consultants Metal strip cooling system
EP0841588B1 (fr) * 1995-04-26 2002-07-10 ILFORD Imaging Switzerland GmbH Procédé et appareil pour le revêtement par rideau d'un support en mouvement
JP3625254B2 (ja) * 1998-12-11 2005-03-02 三菱製紙株式会社 塗布装置
JP2000254567A (ja) * 1999-03-09 2000-09-19 Mitsubishi Paper Mills Ltd 塗布方法および塗布装置
US6982003B2 (en) * 2001-12-13 2006-01-03 Dow Global Technologies Inc. Method and apparatus for curtain coating

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11188299A (ja) 1997-10-03 1999-07-13 Troller Schweizer Eng Ag 移動支持体をカーテンコーティングする方法および装置
JP2006247611A (ja) 2005-03-14 2006-09-21 Voith Paper Patent Gmbh 塗工装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012004875B3 (de) * 2012-03-10 2012-07-19 Andritz Küsters Gmbh Vorrichtung zur Vorhangbeschichtung einer laufenden Warenbahn
DE102014013996A1 (de) 2014-09-25 2016-03-31 Andritz Küsters Gmbh Verfahren und Vorrichtung zur Vorhangbeschichtung
EP3006115A1 (fr) 2014-09-25 2016-04-13 Andritz Küsters GmbH Procede et dispositif destines au revetement de rideau

Also Published As

Publication number Publication date
JP5228227B2 (ja) 2013-07-03
EP2067531A3 (fr) 2010-03-10
JP2009136752A (ja) 2009-06-25

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