EP2014376A2 - Machine de revêtement par rideau - Google Patents

Machine de revêtement par rideau Download PDF

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Publication number
EP2014376A2
EP2014376A2 EP08160070A EP08160070A EP2014376A2 EP 2014376 A2 EP2014376 A2 EP 2014376A2 EP 08160070 A EP08160070 A EP 08160070A EP 08160070 A EP08160070 A EP 08160070A EP 2014376 A2 EP2014376 A2 EP 2014376A2
Authority
EP
European Patent Office
Prior art keywords
curtain
guides
guide plate
edge
guide
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Withdrawn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
EP08160070A
Other languages
German (de)
English (en)
Other versions
EP2014376A3 (fr
Inventor
Takeo Nakazawa
Toshihiro Katano
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 EP2014376A2 publication Critical patent/EP2014376A2/fr
Publication of EP2014376A3 publication Critical patent/EP2014376A3/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Withdrawn legal-status Critical Current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 coater for applying a liquid to pasty medium on a running paper, cardboard or other fibrous web, comprising a spaced from the fibrous web curtain head from which the application medium is discharged downwards, and comprising an inclined guide plate, which receives the dispensed from the curtain head application medium in the region of the upper edge of the slope of the guide plate and let down along the slope and wherein the application medium falls from a curtain guide on the surface of the web in the form of a single or multi-layer curtain.
  • printing paper for catalogs and coated paper which is used, inter alia, for pressure-sensitive grades or thermal paper, is produced by applying a coating to the surface of the web (base paper) with a coating machine and then drying it.
  • Machines that perform the coating of the strokes in this way are, as mentioned, called coaters.
  • the application medium is applied in a more than necessary amount (excess) on the web and then scraped off with a doctor element, such as a blade or a rod or blown off with an air knife (dosed).
  • curtain coating machines have been generally used in which the curtain layer is discharged from the curtain heads spaced apart from the substrate to be coated (chambers with nozzles for discharging the curtain layer), and thus the underlying web is coated.
  • Curtain coaters have long been used for photographic paper, but because of the instability of the curtain layer due to the trapping of air, bubbles trapped in the paint at high speeds, or lack of mechanical accuracy, the paint was not stable so that it would be difficult to clean Practice were not used for paper making.
  • the curtain coater in contrast to the conventional Nachdosiermethoden no wearing parts such as squeegees or rods, so that they have the advantages that the maintenance is simple, that the amount of coating can be adjusted easily and with high accuracy that the operability is good, the effect of Surface improvement for the top coat (contour coat) is high, etc.
  • the web be coated with two or more coats.
  • two curtain heads are placed one behind the other at the top of the moving web.
  • the bar is formed of two layers by allowing the dispensed curtain to descend to the top of the web.
  • this curtain-type coating machine when used for paper webs, the webs are transported at a high speed of 300 to 2000 m / min so that a large difference in speed results because the falling speed of the curtain is about 180 m / min.
  • the curtain forming the lower layer arrives wet on the dry surface of the web.
  • the friction factor between the two is relatively large, the web surface is pulled uniformly, and normally as the first layer (lower layer), a uniform coating without unevenness is formed.
  • the curtain forming the upper layer is wet on the wet surface of the first layer coating, the friction factor therebetween will be low and slippage will occur.
  • the surface of the coating of the first layer can not be pulled well, resulting in unevenness. It can also happen that the coating of the second layer (upper layer) does not form normally.
  • a coater has already been proposed by the applicant of the present invention and disclosed in NO. JP 2006-2496111 disclosed.
  • FIG. 5 shows a part of the side view of the curtain coater. Shown with this Curtain coater to two layers with two curtain heads 1a, 1b are applied.
  • the machine must be stopped in order to change the insert.
  • the stop reduces the productivity of the machine, and it also causes the slot or block to be replaced or the format element to be firmly seated and can not be removed. It would also be possible to use a sliding lid, for which the machine does not have to be stopped, but after long use, the lid is also fixed and can not be moved, so that the application medium emerges from the gap between slot d and cover.
  • the invention is therefore based on the object to provide a curtain coater, which does not have the disadvantages of the prior art.
  • a device for adjusting the order or application width which consists of a pair of adjustable edge guides, a pair of auxiliary guides and a pair of dividing plates, wherein each of the surface of the inside of the edge guide, the surface of the inside of the auxiliary guide and the surface of the inside of the partition plate forms a uniform vertical guide surface for the curtain.
  • the present invention is particularly suitable for applying heat-sensitive layers.
  • the widths of the heat-sensitive layers are changed in concert with the web, the width of the line discharged from the curtain head for the heat-sensitive layer does not change. But this layer can be output over the entire width.
  • the output is divided into a middle part and one part on both sides of the machine. With the middle part of the web is coated, whereas the two side parts are collected.
  • the technical difficulties in the case of changing widths of the bar output from the curtain head for the heat-sensitive layer can be solved.
  • the pull-in caused by the surface tension (narrowing of the width with simultaneous increase in thickness by this proportion) at the edges of the stroke is avoided.
  • edge guides abut each other on the side of the guide plate and extend downwards from the upper region of the guide plate, the inner sides of the edge guides being parallel to one another and also parallel to an imaginary center line of the curtain coater.
  • edge guides each have a pointed lower edge, which in each case expand outward.
  • the auxiliary guides are placed on the upper edges of the edge guides and firmly mounted with these. As a result, they can be adjusted together in the transverse direction.
  • the auxiliary guide are seen from the outside, ie transverse direction of the machine, wedge-shaped.
  • the surfaces of the side edge guides are inclined in the same direction as the inclined guide plate.
  • the existing lateral dividing plates are each permanently mounted on the surface of the relevant auxiliary guides.
  • the surfaces of the auxiliary guides are inclined in the same direction as the surfaces of the auxiliary guides.
  • the dividing plates and the surfaces of the auxiliary guides are inclined in opposite directions to the edge guides and the guide plate.
  • This gutter can catch the lateral parts of the application medium, which flow away from the partition plates opposite to the flow direction of a medium application medium part on the guide plate, wherein the set middle section produces the desired application width.
  • Edge guide and rotatably mounted above the guide plate The nut member is positively connected to the respective bolt and at the same time firmly attached to the side surface of the guide plate.
  • the paint width adjusting device according to the present invention may be used in cases where a curtain head is used and a single layer is applied, but may be applied to the uppermost curtain head when two or more curtain heads are used for plural layers.
  • the application medium which is first output from the curtain head down over the entire width is divided by a device for adjusting the application width.
  • the division takes place in a middle part and two lateral parts. That is to say, the lateral application medium parts each strike a dividing or separating plate. This partition plate is oppositely inclined to the inclination of the guide plate.
  • the lateral application medium part flows down on the separating plate and is collected by the color pan underneath.
  • the middle part which flows As it is down, it hits and travels near the top of the guide plate and travels along its slope, moving from the lower edge of the downward curtain guide to the surface of the web.
  • the surfaces of the inside of the edge guide, the surface of the inside of the auxiliary guide and the surface of the inside of the dividing or separating plate form a uniform vertical guide plane.
  • the side surfaces of the central part are guided by these vertical guide surfaces, and can fall down onto the web, without causing the side edges of the application layer (coating layer) to be pulled in as a result of the application medium surface tension.
  • edge guides on the guide plate be extended to the lower edge of the guide plate, or an edge guide may be provided which has a pair of vertical guide planes which narrows the central part of the paint in the area from the curtain guide to the web.
  • 1 is the curtain head, which outputs the application medium t directed downwards.
  • 2 is the guide plate which receives the medium t discharged from this curtain head 1 in the area of the upper edge of the slope 2a of the guide plate 2 and makes it flow down along the slope 2a and from the downward lower edge of the curtain guide 2b Curtain c moved to the surface of the web w.
  • the upper edge of the guide plate 2 has a bent portion 2c.
  • 9 is a device for adjusting the paint width. This device is arranged symmetrically to the vertical surfaces including the center line c1 of the curtain coater parallel. It is adjustable in the transverse direction (in width).
  • the paint width adjusting device 9 has a pair of edge guides 3 abutting against the side surfaces of the guide plate 2.
  • the edge guides 3 extend downwardly from the upper edge of the guide plate 2 and are parallel to the surfaces on the inside and also to the center line c1 of the coater.
  • the lower edge of the edge guide 3 is seen from the front (see FIG. 2 and 4 (D) pointed trained widens outwards.
  • a pair of auxiliary guides 4 are provided, which are fixedly mounted in the region of the upper edges of the edge guides 3.
  • the auxiliary guides are seen from the outside wedge-shaped (see FIG. 1a . 2C) . 3 (A) . 4 (C) ).
  • the tops of the auxiliary guides 4 and the partition plates 5 arranged thereon are each inclined in opposite directions to the inclination of the guide plate 2 and the edge guides 3 resting thereon.
  • Each dividing plate 5 is fixedly mounted on the surface of the associated auxiliary guide 4.
  • the dividing or separating plate 5 is as in the figures FIG. 1a . 2 (C) . 3 (A) . 4 (C) shown bent downwards at the edge.
  • the surfaces of the inner sides of the edge guides 3 on the Guide plate, the surfaces of the inner sides of the auxiliary guides 4 and the surfaces of the inner sides of the partition plate 5 form, as in FIG. 2 (D) and 4 (D) represented, a uniform vertical guide surface 9a.
  • the positioning device 6 is a device for positioning, with which the adjustment of the position of the device 9 for setting the stroke width in the transverse direction is made.
  • the positioning device 6 consists of the bolts 6a and nuts 6b.
  • the bolts 6 a are rotatably mounted on the side surfaces of the outer sides of the edge guides 3 on the guide plate 2.
  • the nut members 6b which are positively connected to the respective bolts 6a, are simultaneously fixedly mounted on the end surfaces of the guide plate 2.
  • the discharged application medium t which is output from the curtain head 1 downwards over the entire width, is subdivided by means of the arranged underneath device 9 for adjusting the application width in a central part tc and two lateral parts te.
  • the part te strikes the partition plate 5 for both sides of the discharged medium t, which has a gradient opposite to the guide plate 2.
  • the medium t flows down on the partition plate 5 and is collected by the ink tray 7.
  • the middle part tc of the medium t in contrast to the two edge parts te and tc, is directed downwards, hits in the region of the upper edge of the guide plate 2, flows downwards along its slope 2a and moves away from the latter bottom curtain curtain 2b as a curtain c on the surface of the web w, where the coating layer s is formed.
  • the surface of the inside of the edge guide 3, the surface of the inside of the auxiliary guide 4 and the surfaces of the inside of the Separation plate 5 a uniform vertical guide surface 9a, so that the side surfaces of the central part tc is guided by this vertical guide surface 9a and so also on the slope 2a of the guide plate 2 passes without causing the unwanted retraction of the side edges of the application medium, and on the Guide plate 2 flows down.
  • the present invention is not limited to the configuration in the embodiment described above, but it may be changed as long as the main contents of the invention are not violated.
  • a curtain head was used for single-layer application.
  • the invention is also suitable for cases in which a multi-layer application is provided.
  • the invention can be used for the top curtain head 1, where two or more curtain heads are present.
  • the positioning device 6 may not only consist of bolt 6a and nut member 6b as described, but it may also be a combination with a rack or a linear motor.

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  • Coating Apparatus (AREA)
  • Paper (AREA)
EP08160070A 2007-07-13 2008-07-10 Machine de revêtement par rideau Withdrawn EP2014376A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007184492A JP5239008B2 (ja) 2007-07-13 2007-07-13 塗工機の塗工幅調整装置

Publications (2)

Publication Number Publication Date
EP2014376A2 true EP2014376A2 (fr) 2009-01-14
EP2014376A3 EP2014376A3 (fr) 2009-02-04

Family

ID=39846641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08160070A Withdrawn EP2014376A3 (fr) 2007-07-13 2008-07-10 Machine de revêtement par rideau

Country Status (2)

Country Link
EP (1) EP2014376A3 (fr)
JP (1) JP5239008B2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017012A3 (fr) * 2007-07-20 2009-02-25 Voith Patent GmbH Machine de revêtement par rideau
US10232639B2 (en) 2015-04-14 2019-03-19 Hp Indigo B.V. Fluid application

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY154740A (en) 2008-10-20 2015-07-15 Panasonic Ip Corp America Wireless communication base station device and division number determination method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006249611A (ja) 2005-03-10 2006-09-21 Toray Ind Inc 難燃性に優れた布帛物およびその製造方法

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
DE2351369C2 (de) * 1973-10-12 1983-05-11 CIBA-GEIGY AG, 4002 Basel Beschichtungsvorrichtung
US4559896A (en) * 1983-09-15 1985-12-24 Ciba Geigy Corporation Coating apparatus
JPS63107766A (ja) * 1986-10-27 1988-05-12 Nec Corp 塗布装置
JPH0433985Y2 (fr) * 1989-10-12 1992-08-13
EP0520091B1 (fr) * 1991-06-18 1995-12-13 Agfa-Gevaert N.V. Enduiseuse à rideau
JPH07171467A (ja) * 1991-09-02 1995-07-11 Fuji Photo Film Co Ltd 塗布方法及び装置
JP2584923Y2 (ja) * 1992-04-17 1998-11-11 石川島播磨重工業株式会社 塗工装置
JPH06328030A (ja) * 1993-05-25 1994-11-29 Konica Corp 塗布装置及び塗布方法
JP3263298B2 (ja) * 1995-11-22 2002-03-04 ニチハ株式会社 建築材の塗装方法
US5683750A (en) * 1996-07-30 1997-11-04 Eastman Kodak Company High speed coating starts for multiple layer coatings using a temporary top coat
DE19735588A1 (de) * 1997-04-21 1999-02-18 Jagenberg Papiertech Gmbh Verfahren und Vorrichtung zum Auftragen einer Pigmentstreichfarbe auf eine Papier- oder Kartonbahn
US6117236A (en) * 1998-03-18 2000-09-12 Eastman Kodak Company Curtain coating apparatus and method with continuous width adjustment
DE10316999A1 (de) * 2003-04-11 2004-10-28 Bachofen & Meier Ag Vorrichtung zum Beschichten einer laufenden Materialbahn
DE20321815U1 (de) * 2003-05-06 2010-07-22 Voith Patent Gmbh Mehrschicht-Auftragsvorrichtung zum Auftragen von Auftragsmedium im Wege wenigstens eines mehrschichtigen Vorhangs oder Schleiers
JP4746894B2 (ja) * 2005-03-14 2011-08-10 ボイス ペ−パ− パテント ゲ−エムベ−ハ− 塗工装置
DE102005035317A1 (de) * 2005-07-28 2007-02-01 Voith Patent Gmbh Auftragsverfahren

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006249611A (ja) 2005-03-10 2006-09-21 Toray Ind Inc 難燃性に優れた布帛物およびその製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017012A3 (fr) * 2007-07-20 2009-02-25 Voith Patent GmbH Machine de revêtement par rideau
US10232639B2 (en) 2015-04-14 2019-03-19 Hp Indigo B.V. Fluid application

Also Published As

Publication number Publication date
JP2009018285A (ja) 2009-01-29
EP2014376A3 (fr) 2009-02-04
JP5239008B2 (ja) 2013-07-17

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