EP1598115A2 - Appareil de couchage par rideau - Google Patents

Appareil de couchage par rideau Download PDF

Info

Publication number
EP1598115A2
EP1598115A2 EP05103793A EP05103793A EP1598115A2 EP 1598115 A2 EP1598115 A2 EP 1598115A2 EP 05103793 A EP05103793 A EP 05103793A EP 05103793 A EP05103793 A EP 05103793A EP 1598115 A2 EP1598115 A2 EP 1598115A2
Authority
EP
European Patent Office
Prior art keywords
curtain
coating
slot
web
head
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
EP05103793A
Other languages
German (de)
English (en)
Other versions
EP1598115B1 (fr
EP1598115A3 (fr
Inventor
Hirofumi Morita
Akio Hirano
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
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 EP1598115A2 publication Critical patent/EP1598115A2/fr
Publication of EP1598115A3 publication Critical patent/EP1598115A3/fr
Application granted granted Critical
Publication of EP1598115B1 publication Critical patent/EP1598115B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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 invention relates to a curtain coating with a coating head the one coating color from a slot provided on the coating head from above to a running under it, especially from paper or cardboard, falls and forms a coating curtain, which on a Side of the aforementioned train arrives.
  • Coated papers such as for catalogs, brochures, Thermal paper or automatically canceled tickets are by applying a coating color to the surface of a raw paper existing railway produced.
  • Whiskers Machines for applying these coating colors are generally referred to as Whiskers, with such a coating, by a Position above the example of paper or cardboard existing Apply the coating paint on this web as a curtain coating (Curtain Coater).
  • coating paint of a predetermined thickness is applied to the The top of the train is applied in the head body 101 [head body] coating paint from the curtain coating unit 100 from above in with respect to the conveyed web (not shown) so delivered that it forms perpendicular to the plane of the paper in Fig. 6 (a) a curtain tc.
  • This curtain coating 100 generally occurs in the case of Curtains tc with a low flow rate (from 6 to 7 l / min / m width and less) the problem that, as shown in Fig. 6 (b), due to inward acting surface tension the edge areas ce of Curtain tc be pulled inside, causing the curtain tc the Coating color t becomes unstable.
  • the dispensing opening for the coating color in the coating head body 201 head body
  • guide rods gb or plates provided.
  • curtain coating works 100 in such cases, where the flow rate of the delivered Coating color t is low, in general the problem that the Edge areas ce of the curtain tc are drawn inward, resulting in destabilization of the curtain tc of the coating color t.
  • the coating color t must always flow at a certain minimum flow rate, so that this defect can be remedied. This results in the Disadvantage that actually unnecessary coating color t is consumed.
  • curtain Brush 200 which is provided with panels, also causes Coating color t adheres to the guide rods gb or plates and himself solidified there after drying. This causes the curtain tc in Clutter and leadership functionality is lost.
  • guide rods gb or plates also have the Disadvantage that they are similar in the execution of maintenance or similar. to disturb. They thus lead to a decline in labor productivity.
  • this object is achieved by that the slot also at least one next to the web surface, or forms outside the width of the web falling curtain part, wherein the Slot in the area outside the web surface or the web width at least partially wider than the slot that forms the rest or gives actual curtain on the web surface.
  • the invention thus allows for a reduced Coating color flow rate good coating performance.
  • the slot on Coating head is designed so that at least one of its two marginal ends is shaped wider than the remaining part of the slot. This allows to reduce the width of the curtain coating.
  • An expedient embodiment of the novel curtain coating unit is that the wider part of the slot Width dimension, which is at least twice the width dimension the remaining slot responsible for hitting the track, is.
  • the flow rate of the coating color therefore exceeds a certain one here necessary degree, so that the force acting in Vorhangsgabgabichtung direction increases and an even more stable coating color curtain is obtained.
  • the at least one wider Slot at the edge end the shape of a rectangle, circle, oval or the like.
  • the coating head consists of two bodies is, with the broadened slot only in one body, or in both Body is incorporated.
  • the coating head is thus easier to produce.
  • the curtain coating can be further developed by the widened slot at a certain distance from at least one edge end of the coating head or its body is arranged. He therefore does not need to be at the very end, but instead can also be positioned at other locations outside the web width.
  • Fig. 1 (a) it is a device based on the Surface of a base paper web 2 a coating color t applies, wherein the Lane 2 at a speed of 100 to 2000 m / min in the ⁇ marked arrow direction is promoted.
  • Fig. 1 (b) is a view of the device shown in Fig. 1 (a) Direction of the arrow A.
  • the curtain brush 1 gives a coating color t starting from a coating ink feed tk the closer below discussed chamber of a coating head 3 is supplied via a Slit s1 and the wider slots s2 in the form of a curtain tc on the Top of the conveyed web 2.
  • Coating color curtain part (inner part) tc1 and tc2 as edge-side Curtain part gebi Idet.
  • a Coating color layer in a predetermined thickness of, for example, 10 formed to 50 microns.
  • this curtain coating 1 is that the thickness m c1 for the inner part of the coating color curtain tc1 above the top of the web 2 0.3 mm are specified, while the thickness m c2 of the edge coating curtain parts tc2, which forms part of Show coating paint curtain next to the top of the web 2, 1 to 3 mm are given.
  • higher flow rates are achieved in the coating color curtain parts tc2 at the two side edges than in the inner part of the coating color curtain tc1.
  • a resistance to the surface tension acting with orientation inwards on the marginal coating color curtain parts tc2 is built up and thus a stabilization of the coating color curtain tc is achieved.
  • This feature makes it possible for the curtain coater 1 to have a specified order performance with a specific coating color quantity t at low flow rate.
  • the collected coating color t is in a tank, not shown returned and together with newly supplied coating color t with a predetermined pressure by means of a pump circulated. To Defoaming, filtration and the like, they will then over the Coating ink supply inlet tk of the chamber 3c (see Fig. 2 (a), which has a Cross section along the line B-B in Fig. 1 (b) shows) of the coating head 3 supplied.
  • the coating color t fed into the chamber 3c becomes the coating equipment the top of the web 2 through the slots s1, s2 in the form of curtains tc1, tc2 are delivered to the top of the web 2.
  • the brush head as shown in FIG. 1 (b), has a body 3b, two-sided seals 3p, which seal the body 3b and thus a Prevent leakage of coating color t, and double-sided coating end plates 3e, which the seals 3p closely following the Keep body 3b.
  • a slit s1 is provided on this coating head 3.
  • the slit s1 serves to form the inner coating color curtain tc1 and is provided on the coating head body 3b1, 3b2 with a width dimension m s1 of 0.3 mm, the slits s2 are again provided with a width m s21 of 1 to 3 mm at the seals 3p and serve to form the two marginal coating color curtain parts tc2.
  • a width m s1 0.3 mm for slit s1 and a width m s21 of at least 0.6 mm for slit s2 is preferred. In particular values of 1 to 3 mm have proven to be ideal.
  • the width dimension m s1 of slot s1 was selected as the width dimension m s1 of slot s1, but it is possible to specify values of 0.2 to 0.5 mm as the width dimension m s1 instead.
  • the width dimensions m s1 and m s21 for slit s1 and slit s2, respectively, can be suitably selected according to the coating conditions, such as the thickness of the coating color layer to be applied to the web 2.
  • the swab body 3b has, as shown in Figs. 2 (a) and 2 (c) first brush body 3b1 and a second brush body 3b2, the Together form the body 3 and 3 strokes, and a first lip 311 and a second lip 312, in the first and second Streichkopf stresses 3b1, 3b2 are included and to adjust the Width of slot s1 serve.
  • the first and second coating head bodies 3b1, 3b2 are made, for example each made of stainless steel, as shown in Fig. 1 (b) and Fig. 2 (c) shown, cutouts on which the chamber 3c with defined geometry and one side portion of the slot s1 each having the specified width of 0.3 mm, and are made in an elongated shape, so that they correspond to the width of the web 2 from 1 to 10 m or wider.
  • the lips 311, 312 are made of stainless steel, for example. In they are drilled through a hole that is part of the 0.3 mm wide Slit s1 forms, as shown in Fig. 2 (a), by the one (not shown) Screw for adjusting and adjusting the width of the slot s1 out becomes.
  • the gaskets 3p are shown in FIG. 2 (b), a cross section along the straight line CC in FIG. 1 (b). These are, for example, components made of rubber or rubber, for example butadiene rubber.
  • a hole 3p1 corresponding to the chamber 3c in the coating head body 3b is formed in the gaskets.
  • the coating color t passes through Slot s2 flows at a higher flow rate than through slot s1. Accordingly, the coating color curtain tc2, tc2 discharged from slit s2 is thicker than the coating color curtain tc1 discharged from slit s1.
  • the slots s2 have the a portion of the coating color curtain next to the top of the web. 2 forming slits and the edge sections tc2, tc2 of Coating color curtain form, a wider width than the slot s1, the the inner portion tc1 of the coating color curtain and thus the above the upper side of the web 2 lying part of the coating color curtain forms.
  • This causes an increase in the flow rate of the marginal Coating curtain parts tc2 causes and due to it accompanying weight increase will be the influence of the inside directed surface tension on the edge side Paint curtain parts tc2 diminished and thus prevents the edge coating color curtain parts tc2 are drawn inwards.
  • a flow rate of 7.4 l / min / m was previously required to achieve a given coating performance, as has been verified by adjusting the slot s1, (which defines the inside coating color curtain tc1 above the top of the web 2) and the width of the web corresponds to 2), to a width m s1 of 0.3 mm and adjusting the slits s2, which form the edge coating color curtain tc2 next to the top of the web 2 (ie outside the web width), to a width m s21 of 3 mm, a reduction of the coating color flow rate to 5.4 l / min / m can be achieved.
  • the invention thus enables a curtain coating, which at high Coating achieves a stable coating color curtain and with low coating color flow rates works.
  • a chamber is formed to form the inside coating paint curtain 2tc1 23c for supplying the first coating body 23b1 and the second coating body 23b2 with coating color t and a slit 2s1 which adjoins the chamber 23c and has a width dimension m s1 .
  • first and second coating body 23b1, 23b2 are each a first and second lips 2311, 2312 are provided, of which at least one or both kept adjustable by a setting screw become.
  • first lip 2311 and the second lip 2312 is the Slit 2s1 formed so that to him the first coating head body 23b1 and the second brush body 23b2.
  • a cross section along the straight line EE of the coating head 23 in Fig. 3 (a) is to form the edge coating paint curtain portions 2tc2 adjacent to the upper surface the web 22 are formed at a high flow rate, at the first and second swab bodies 23b1, 23b2 adjacent to the chamber 23c and parallel to slit 2s1, there is provided a slit 2s22 having a width dimension m s22 which is identical to width dimension m s1 .
  • a first and a second lip 2311 and 2312 are provided, which are held adjustable by means of adjusting screws.
  • the slit 2s22 is formed so as to be connected to the first swab body 23b1 and the second swab body 23b2.
  • a slit 2s21 is provided which widens toward the first lip 2311 and has a width dimension m s21 which is larger than the width of slit 2s22.
  • width dimension m s1 of slit 2s1, over which the inside-side coating curtain part 2tc1 is formed is 0.3 mm
  • width dimension m s2 for the slits 2s2 through which the edge-side coating color curtain parts 2tc2 are formed at least 0.6 mm must be selected, however, it is preferably selected in a range of 1 to 3 mm.
  • Embodiment 2 as shown in FIG. 3 (b), in FIG Extension of the slots 2s2, which are the marginal Coating color curtain parts 2tc2 form, only an extension on the first Coating head body 23b1 made.
  • the slots 2s2 ' are instead provided such that As shown in Fig. 4 (a), a drawing of the bottom, their ends are shown each by the same measure m3 in the first and second Expand the brush body 23b1 ', 23b2' into it.
  • the slots 2s2 ' are also symmetrical to the plane, in the first coating body 23b1 'to the second coating head body 23b2 connects, arranged.
  • the slots can, however, also to each other be arranged asymmetrically.
  • the wider slots 2s2 "so do not necessarily on the two be formed outermost ends of the coating color curtain, but can also be provided widened in other places.
  • the widened slots can thus be positioned at the coating head be that their position outside the top of the web 2 and destabilization of the curtain is avoided (see FIG. 1 (b), Fig. 3 (a)).
  • the position of the widened slots is thus by no means limited to a particular position.
  • the material in which the widened slots are provided can be chosen arbitrarily, for example, they can widened slots provided on both the first and second coaters In addition, they can, as in Example 1, in the Coating body seal or even be provided so that they connect both to the brush head body and its gasket.
  • FIG. 3 (b) the cross section of slit 2s2 may also be as shown in FIG 5 (a), are made round, and that shown in FIG. 4 (a) Cross-section of slot 2s2 'may also be round, as shown in Fig. 5 (b) be executed.
  • FIG. 4 (b) shown Slot 2s2 ", as shown in Fig. 5 (c), performed round.
  • Application examples of the invention are brush strokes of cardboard and papers for calendars, catalogs, brochures, thermal paper or pressure-sensitive paper, and brushes for one-sided brushing of automatically validated tickets with a magnetic Coating color. As long as it concerns Schreichwerke, which on tracks apply a coating color are the applications of the Invention no limits.

Landscapes

  • Coating Apparatus (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Paper (AREA)
EP05103793A 2004-05-18 2005-05-09 Appareil de couchage par rideau Not-in-force EP1598115B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004147611 2004-05-18
JP2004147611A JP4542816B2 (ja) 2004-05-18 2004-05-18 カーテン式コータ

Publications (3)

Publication Number Publication Date
EP1598115A2 true EP1598115A2 (fr) 2005-11-23
EP1598115A3 EP1598115A3 (fr) 2008-06-18
EP1598115B1 EP1598115B1 (fr) 2012-04-25

Family

ID=34939726

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05103793A Not-in-force EP1598115B1 (fr) 2004-05-18 2005-05-09 Appareil de couchage par rideau

Country Status (4)

Country Link
US (1) US7820247B2 (fr)
EP (1) EP1598115B1 (fr)
JP (1) JP4542816B2 (fr)
AT (1) ATE554861T1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000778A1 (de) 2007-09-27 2009-04-02 Voith Patent Gmbh Auftragsvorrichtung und Verfahren zum Betreiben einer Auftragsvorrichtung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080178799A1 (en) * 2007-01-30 2008-07-31 Hiroyuki Kohno Two-layer curtain coater system
JP4905817B1 (ja) * 2010-12-15 2012-03-28 大阪シーリング印刷株式会社 カーテンコーター、塗工液誘導具

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081061A (ja) 1994-06-17 1996-01-09 Mitsubishi Paper Mills Ltd カーテン塗布方法及びその装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341354A (en) * 1964-03-11 1967-09-12 Continental Oil Co Curtain coating method and apparatus for applying a non-uniform liquid coating material to sheet stock
JPS532108A (en) * 1976-06-28 1978-01-10 Fuji Photo Film Co Ltd Method of producing pressure sensitixed copy sheets
JPS582466Y2 (ja) * 1978-05-30 1983-01-17 野田合板株式会社 カ−テン．フロ−．コ−タ
JP2558883Y2 (ja) * 1991-12-13 1998-01-14 石川島播磨重工業株式会社 塗工装置
JP3257340B2 (ja) * 1995-05-24 2002-02-18 松下電器産業株式会社 液体塗布方法、液体塗布装置およびスリットノズル
JPH0938559A (ja) * 1995-07-31 1997-02-10 Mitsubishi Alum Co Ltd カーテンコーターヘッド
JPH10165869A (ja) * 1996-12-10 1998-06-23 Mitsubishi Paper Mills Ltd カーテン塗布装置及び塗布方法
JP2000051762A (ja) * 1998-08-12 2000-02-22 Toshiba Emi Ltd 現像ノズル
JP2004033867A (ja) * 2002-07-02 2004-02-05 Fujitsu Ltd カーテンコーターノズル

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH081061A (ja) 1994-06-17 1996-01-09 Mitsubishi Paper Mills Ltd カーテン塗布方法及びその装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007000778A1 (de) 2007-09-27 2009-04-02 Voith Patent Gmbh Auftragsvorrichtung und Verfahren zum Betreiben einer Auftragsvorrichtung

Also Published As

Publication number Publication date
US7820247B2 (en) 2010-10-26
JP2005329280A (ja) 2005-12-02
US20050271825A1 (en) 2005-12-08
EP1598115B1 (fr) 2012-04-25
JP4542816B2 (ja) 2010-09-15
ATE554861T1 (de) 2012-05-15
EP1598115A3 (fr) 2008-06-18

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