EP2070599A2 - Unité d'application de rideau - Google Patents

Unité d'application de rideau Download PDF

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Publication number
EP2070599A2
EP2070599A2 EP08170654A EP08170654A EP2070599A2 EP 2070599 A2 EP2070599 A2 EP 2070599A2 EP 08170654 A EP08170654 A EP 08170654A EP 08170654 A EP08170654 A EP 08170654A EP 2070599 A2 EP2070599 A2 EP 2070599A2
Authority
EP
European Patent Office
Prior art keywords
medium
guide plate
curtain
height
fibrous web
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08170654A
Other languages
German (de)
English (en)
Other versions
EP2070599A3 (fr
Inventor
Takeo Chuo-ku Yaesu Nakazawa
Katsumi Chuo-ku Yaesu Ishizuka
Hiroyuki Kohno
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 EP2070599A2 publication Critical patent/EP2070599A2/fr
Publication of EP2070599A3 publication Critical patent/EP2070599A3/fr
Withdrawn legal-status Critical Current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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters

Definitions

  • the present invention relates to a curtain applicator for coating a running paper, cardboard or other fibrous web, comprising at least two above the fibrous web arranged applicator heads, each directed downward application medium and each form medium curtains, having also in the running direction of the fibrous web below the applicator heads and forming an inclined plane guide plate, which receives the output from the applicator heads in order on its inclined plane, the guide plate down the medium curtains along the inclined plane in sliding layers and then from a trailing edge at the bottom of the guide plate flow as at least two-layer medium curtain on the surface of the fibrous web.
  • Coated paper such as printing paper, pressure-sensitive paper, thermal paper, catalogs, etc. is made by running a running web through a coater and then drying.
  • coaters Machines that apply application media in this manner are called coaters.
  • 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 in this case applied to the web application medium in abundance and metered by means of doctor blade scraped off the excess application medium or blown away by means of the air knife.
  • the metering has disadvantages, such that the fluid pressure during application of the application medium to the web, through the pressure of the squeegee o. ⁇ . A lot of application medium penetrates into the web and that by the wear of squeegee, rod o. ⁇ ., The maintenance costs are high.
  • the superfluous scrapped medium must be removed and regenerated, which is complicated and expensive.
  • curtain coaters have frequently been used to coat the surface of a web of material, i. a paper-cardboard or other fibrous web used. With the help of a curtain applicator coating is done "contactless", i. There is no additional dosage.
  • 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 an application medium chamber and a likewise at least 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 This prior art is shown in a partial sectional drawing of a curtain coater for two layers.
  • the two-layer curtain applicator has 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.
  • a guide plate B is provided in the form of an inclined plane Ba.
  • the curtains ca and cb emitted by the two curtain heads 1a and 1b lay down in sequence as a two-layered medium layer ra and rb. From a downwardly directed curtain guide part Bb of the guide plate B at the lower edge part of this inclined plane Ba, this double layer reaches the surface of the fibrous web w as a two-layer medium curtain ca, cb.
  • the two coating layers sa (lower layer) and sb (upper layer) are formed on the surface of the moving web w. Furthermore, the arrow shows the direction of movement of the web w.
  • the curtain layers ca and cb fall down from the guns 1a and 1b by their own weight, but the surface tension of the coating medium causes the edge portions to be drawn toward the inside and the width of the curtain layers ca and cb to become narrower (constricted), so that a so-called "neck-in” occurs.
  • an edge guide is provided.
  • Fig. 4 is a conceptual drawing of this edge guide.
  • 1 is the applicator head
  • 2 is the edge guide
  • c is the medium curtain layer
  • B is the guide plate. Since the edge guide 2 is made of metal and is hydrophilic, it has the effect of preventing neck-in.
  • the margin guide 2 could be replaced by a shorter one. It would certainly be possible to shorten the distance s from the application head 1 to the guide plate B up to the distance s1 before tearing in the width direction.
  • the layer r (r1, r2) on the guide plate B may become irregular.
  • the invention is therefore based on the object to provide a curtain applicator available that does not have these disadvantages.
  • the object is achieved in that the application heads are adjustable in height and in their position in the direction of movement of the fibrous web edge guides are provided in the region of both lateral edges of the guide plate, which correspond substantially to the length of extending in the web running direction guide plate and in Width direction of the commissioned work, are adjustable to adjust and maintain the width of all delivered medium curtains and sliding layers.
  • a pair of edge guides are provided on a sliding basis and along the surface of the edge guides on a sliding basis the applicator heads are movable.
  • 1a designates the first application head which, when directed downwards, emits a first application medium and forms a medium curtain.
  • the downstream, second application head is called, which also directed down directed application medium and forms another medium curtain.
  • the height and the position in the direction of movement of the fibrous web w can be regulated.
  • an inclined guide plate B is arranged which receives the medium curtains discharged from the applicator heads sequentially on its inclined plane. Along this inclined plane leaves the guide plate B, the individual curtains superimposed flow down and flow from the downwardly directed curtain guide Bb at the bottom of a multi-layered (ie double-layered) medium curtain on the surface of the fibrous web w.
  • the medium curtain is designated by the application head 1a. Consequently, c2 is the medium curtain from the application head 1 b.
  • the medium layer formed on the guide plate B by means of the medium curtain c1 is indicated by r1, and by r2 the medium layer formed by means of the medium curtain c2 on the medium layer c1 is indicated.
  • a pair of edge guides 2 is provided, which is provided in the vicinity of both edges in the width direction of the guide plate B.
  • the bottom of the edge guide 2 abuts on the top of the guide plate B.
  • the measure between the inner surfaces is correct with the width of the delivered from the guns from Application medium (width of the medium curtain c1, c2) match.
  • the height From the point a at the upper edge of the edge guides 2 to the point b at the lower edge side, there is the uniform height t1, from the point b downwards, the height gradually increases until it reaches the vertex c of the height t2. From the vertex c directed downstream, the height is gradually lower until it reaches the point d of the height t3. From point d, the height remains uniform downstream at t3.
  • Fig. 3 is an apparatus for regulating the position provided in the longitudinal direction of the slide-base edge guides 2 at two places.
  • the position adjusting device 3 consists of an adjusting screw 4 which is rotatably mounted on the outside side surfaces of the edge guides on slide base 2 and the nut part 5 which is screwed with this adjusting screw 4 and at the same time fixed to the edge surface of the guide plate B.
  • the width of the application media dispensed from the applicator head is regulated to match the dimension between the inner surfaces of the edge guides 2, and there are many possible methods for doing so.
  • a spacer may be inserted from below, which is fixed from the outside and thus leakage of coating medium is prevented and at the same time the falling of the spacer is prevented. It is also possible if a lid is inserted into the slot from the side. This cover can be moved to regulate the delivery width of the slot.
  • the advantage of the embodiment described is that, even if the flow amount is small and the thickness of the medium curtain is thin, the medium curtain falling down by its own weight does not tear in the width direction and does not split (see Fig. 4 prior art).
  • 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 height of the edge guides 2 on the inclined guide plate B are straight or constantly changing.
  • the edge guide could also be in the form of a curved line, such as a sinusoid. However, it is not desirable to have steps in between.
  • a curtain coater for two layers has been shown and described, but a curtain coater for three or more layers may also be provided.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
EP08170654A 2007-12-05 2008-12-04 Unité d'application de rideau Withdrawn EP2070599A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007314878A JP2009136751A (ja) 2007-12-05 2007-12-05 カーテンコータ

Publications (2)

Publication Number Publication Date
EP2070599A2 true EP2070599A2 (fr) 2009-06-17
EP2070599A3 EP2070599A3 (fr) 2010-03-24

Family

ID=40380335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08170654A Withdrawn EP2070599A3 (fr) 2007-12-05 2008-12-04 Unité d'application de rideau

Country Status (2)

Country Link
EP (1) EP2070599A3 (fr)
JP (1) JP2009136751A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112536189A (zh) * 2020-11-30 2021-03-23 浙江聚众柔印科技有限公司 一种便于调节的柔版印刷机用的涂胶装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006247611A (ja) 2005-03-14 2006-09-21 Voith Paper Patent Gmbh 塗工装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2962311D1 (en) * 1978-03-01 1982-04-29 Agfa Gevaert Nv Method for applying a plurality of superposed photographic layers to a web by curtain coating
DE3037612A1 (de) * 1980-10-04 1982-05-13 Agfa-Gevaert Ag, 5090 Leverkusen Randleisten an gleitflaechen von kaskaden- und vorhanggiessern
JPH07171467A (ja) * 1991-09-02 1995-07-11 Fuji Photo Film Co Ltd 塗布方法及び装置
JP2529812B2 (ja) * 1992-10-27 1996-09-04 三菱化学株式会社 ダイコ―タ
JPH0889886A (ja) * 1994-09-22 1996-04-09 Konica Corp カーテン塗布方法
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
DE19903260A1 (de) * 1999-01-28 2000-08-03 Agfa Gevaert Ag Verfahren und Vorrichtung zum Vorhangbeschichten
JP4077784B2 (ja) * 2003-12-04 2008-04-23 新日本製鐵株式会社 カーテン塗覆方法及びカーテン塗覆装置
JP4902160B2 (ja) * 2005-09-22 2012-03-21 ボイス ペ−パ− パテント ゲ−エムベ−ハ− 塗工装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006247611A (ja) 2005-03-14 2006-09-21 Voith Paper Patent Gmbh 塗工装置

Also Published As

Publication number Publication date
EP2070599A3 (fr) 2010-03-24
JP2009136751A (ja) 2009-06-25

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