EP2591862B1 - Vorhang-Auftragswerk - Google Patents

Vorhang-Auftragswerk Download PDF

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Publication number
EP2591862B1
EP2591862B1 EP12007200.4A EP12007200A EP2591862B1 EP 2591862 B1 EP2591862 B1 EP 2591862B1 EP 12007200 A EP12007200 A EP 12007200A EP 2591862 B1 EP2591862 B1 EP 2591862B1
Authority
EP
European Patent Office
Prior art keywords
curtain coater
flow
coater according
curtain
application medium
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.)
Active
Application number
EP12007200.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2591862A1 (de
Inventor
Eduard Davydenko
Andreas Pesch
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Kuesters 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 Andritz Kuesters GmbH filed Critical Andritz Kuesters GmbH
Publication of EP2591862A1 publication Critical patent/EP2591862A1/de
Application granted granted Critical
Publication of EP2591862B1 publication Critical patent/EP2591862B1/de
Active 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
    • 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
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • 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 invention relates to a curtain applicator for dispensing liquid or pasty application medium according to the preamble of claim 1.
  • a generic curtain applicator which ensures a homogenization of the pressure and / or quantity distribution of the application medium in the transverse direction of the commissioned work.
  • a first and a second distribution chamber are arranged one behind the other in the flow direction and between them extends a flow gap which is subdivided into sectional streams.
  • the coating When coating a paper or board web with a curtain coater, the coating should be applied as evenly as possible over the entire web width.
  • the application thickness must be as constant as possible over the entire web surface.
  • the basic prerequisite for this is a uniform distribution of the coating mass over the outlet width with regard to the volume flow and the speed. This task is particularly difficult to meet for large working widths of for example 8 to 10 m and low application weights of, for example, 2 to 10 g / m 2 .
  • a curtain applicator in which the nozzle body consists of two wall-shaped parts which have a desired working width corresponding length.
  • a longitudinal groove is incorporated, which forms a distribution chamber after the joining of the two parts.
  • To the distribution chamber an over the working width extending discharge channel is connected, from which the coating color emerges.
  • the flow conditions in the distribution chamber are influenced by the supplied volume flows.
  • At least two supply channels are connected to the distribution chamber, each having a device for adjusting the supplied volume flow of coating color.
  • a device for adjusting the supplied volume flow of coating color Preferably Schlauchklemm- or diaphragm valves are used for the flow adjustment.
  • the volume flows of each feed channel are therefore set separately.
  • a second distributor chamber is arranged between the distributor chamber and the outlet channel. Between the then first distribution chamber and the second distribution chamber is an additional flow channel.
  • the disadvantage is the requirement of additional actuators for the cross profile adjustment.
  • a further disadvantage is that the individual partial flows from the individual sections can not be combined to form a uniform film flow in the outlet gap. In the exit slit and in the curtain then arise stripes that lead to coating defects and cause production disruptions.
  • the object of the invention is therefore to provide a curtain applicator, which ensures a high uniformity of the distribution of a coating medium over a discharge width.
  • a curtain applicator which connects the section streams (partial streams) to a uniform film flow in the curtain and avoids streaking.
  • a homogenization of the pressure and / or quantity distribution of the application medium in the transverse direction of the commissioned work can thus be combined with a uniform film flow.
  • the flowpath patterns are labyrinthine flowpath patterns.
  • the invention relates to a curtain applicator for dispensing liquid or pasty application medium in the form of a substantially gravitational moving curtain to a moving paper or board web.
  • the curtain applicator comprises a nozzle body having a first, along a feed width extending manifold chamber 1.
  • This distribution chamber 1 is supplied via at least one supply line (not shown), the application medium.
  • the flow direction S of the application medium to be supplied can start from one end of the distribution chamber 1.
  • the nozzle body further comprises a second distribution chamber 3, which emits the application medium via a discharge gap 4 as a curtain. Between the first 1 and second distribution chamber 3, an additional flow channel 2 is provided, which decomposes the application medium into section streams 2.1, 2.2, 2.3.
  • the flow direction S is here perpendicular to the transverse direction of the curtain applicator.
  • the second distribution chamber 3 has in the flow direction S a flow path with a plurality of changes in direction, which runs through throttling points 3.1 and expansion chambers 3.2.
  • Fig. 1 shows, preferably connects to the flow channel 2, a first throttle point 3.1.
  • This first throttle point 3.1 is formed for example by a flow loop, which reduces the flow path.
  • At the throttle point 3.1 is thus a local Strömungswegverengung. This reduction of the flow path is carried out eccentrically to a fluid line of the flow channel 2.
  • the first throttle point 3.1 is followed in the flow direction S, preferably a first expansion chamber 3.2, in which the cross section of the flow path with respect to the throttle point 3.1 is greater.
  • the flow cross-section is substantially equal to or greater than the flow area of the flow channel 2.
  • a second throttle point 3.1 which in turn is arranged eccentrically, but laterally offset to the fluid line of the flow channel 2.
  • a second expansion chamber 3.2 At the second throttle point 3.1 is preferably followed by a second expansion chamber 3.2, to which a third throttle 3.1, offset to the second throttle point 3.1, followed.
  • the outlet gap 4 Before the outlet gap 4 is preferably still another expansion chamber 3.2 provided, the dimensions of which can be greater compared to the upstream expansion chambers 3.2.
  • the flow path has a plurality of changes in direction, which provide for a connection of the flow edges of the section streams 2.1, 2.2, 2.3, wherein the expansion chambers 3.2 provide for sufficient intermediate reassurance of the flow.
  • the result is the formation of a uniform film flow in the distribution chamber 3, starting from the section streams 2.1, 2.2, 2.3.
  • the arrangement of the throttle points 3.1 can determine a flow path pattern.
  • a throttle 3.1 and an expansion chamber 3.2 are preferably arranged alternately.
  • the throttle points 3.1 and the expansion chambers 3.2 are also preferably each formed machine width.
  • the change of direction in the flow path can for example be regular.
  • the second distribution chamber 3 is formed labyrinthine.
  • the throttling points 3.1 can form a sequence of flow loops, wherein an expansion chamber 3.2 is arranged between each two flow loops.
  • At least three throttles 3.1 and two expansion chambers 3.2 are preferably arranged in the flow direction S successively.
  • the flow channel 2 is divided into a plurality of individual guide channels for the section streams 2.1, 2.2, 2.3.
  • the guide channels for the section streams 2.1, 2.2, 2.3 on the outlet side in each case into a diffuser 5.1, 5.2, 5.3 for a downstream merge the section streams 2.1, 2.2, 2.3 pass.
  • the section streams 2.1, 2.2, 2.3 preferably extend perpendicular to the transverse direction of the commissioned work from the first distribution chamber 1. Furthermore the section streams 2.1, 2.2, 2.3 preferably arranged in a row.
  • a remaining partial height of a flow channel 6 may be formed in the form of a machine-wide flow gap to merge the individual section streams 2.1, 2.2, 2.3 again before the entry into the second Distribution chamber 3 takes place.
  • the flow-contacting parts of the curtain applicator are mechanically and chemically stressed. It is therefore advantageous to produce these from stainless steels, for example from the following materials such as molybdenum-free Cr-Ni steels, molybdenum-containing Cr-Ni steels or ferritic-austenitic duplex steels.
  • the nozzle body may consist of a thermoplastic material.
  • the high performance plastics such as PEI, PEEK, PPSU, PTFE, PVDF, POM according to DIN EN ISO 1043-1 as material for the production of the nozzle body, in particular of the main body 2.4.
  • the nozzle body described according to the invention can be used for a curtain coating by the slide-die method or a slot die method.
  • Fig. 4 shows a curtain applicator for multilayer application of liquid or pasty medium to a moving paper or board web.
  • the nozzle body forms separate media streams 10, 11 for the layers to be applied, which are combined to form a curtain 12 at the exit of the outlet gaps 4 of a cascade nozzle body.
  • a plurality of the nozzle bodies described above are arranged side by side, here for example two. Via a feed lip 13 with a trailing edge 14 flows from the outlet columns. 4 exiting curtain 12 on the moving web 15, which moves under the coating device in the transport direction T.

Landscapes

  • Coating Apparatus (AREA)
EP12007200.4A 2011-11-09 2012-10-18 Vorhang-Auftragswerk Active EP2591862B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011118053A DE102011118053A1 (de) 2011-11-09 2011-11-09 Vorhang-Auftragswerk

Publications (2)

Publication Number Publication Date
EP2591862A1 EP2591862A1 (de) 2013-05-15
EP2591862B1 true EP2591862B1 (de) 2018-08-08

Family

ID=47115164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12007200.4A Active EP2591862B1 (de) 2011-11-09 2012-10-18 Vorhang-Auftragswerk

Country Status (7)

Country Link
US (1) US20130112137A1 (ja)
EP (1) EP2591862B1 (ja)
JP (1) JP2013099738A (ja)
KR (1) KR20130051401A (ja)
CN (1) CN103100507A (ja)
BR (1) BR102012027524A2 (ja)
DE (1) DE102011118053A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103691623B (zh) * 2013-12-23 2016-04-06 清华大学深圳研究生院 实现均匀喷涂低冲击的组合工艺喷嘴
EP2894254B1 (en) * 2014-01-08 2019-08-21 Valmet Technologies, Inc. Coating device for applying coating color onto a fiber web and method for coating of a fiber web
US9597703B2 (en) * 2015-02-18 2017-03-21 Lam Research Ag Slit nozzle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6291267A (ja) * 1985-10-17 1987-04-25 Sansho Kk コ−タヘツドアツセンブリ
JP3378651B2 (ja) * 1994-06-08 2003-02-17 富士写真フイルム株式会社 塗布装置及び方法
DE19755625A1 (de) 1997-12-15 1999-07-01 Jagenberg Papiertech Gmbh Schlitzdüse zum Beschichten von Materialbahnen, insbesondere Papier- oder Kartonbahnen mit Pigmentstreichfarbe
US6350318B1 (en) * 1998-12-17 2002-02-26 Eastman Kodak Company Optimized versatile coating hopper
FI119444B (fi) * 2003-09-10 2008-11-14 Metso Paper Inc Paperi-/kartonkirainan päällystyslaite
DE102004018597B3 (de) * 2004-04-16 2005-12-01 Dürr Systems GmbH Applikationskopf zur Erzeugung einer Flüssigfolie
DE102008040584A1 (de) * 2008-07-21 2010-01-28 Voith Patent Gmbh Slide-Die-Vorhang-Auftragsmaschine
DE102009036853B3 (de) 2009-08-10 2010-11-11 Andritz Küsters Gmbh Vorhang-Auftragswerk
DE102009048820A1 (de) * 2009-10-09 2011-04-14 Andritz Küsters Gmbh Vorhang-Auftragswerk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
BR102012027524A2 (pt) 2014-04-08
KR20130051401A (ko) 2013-05-20
JP2013099738A (ja) 2013-05-23
DE102011118053A1 (de) 2013-05-23
EP2591862A1 (de) 2013-05-15
CN103100507A (zh) 2013-05-15
US20130112137A1 (en) 2013-05-09

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