EP2596171A1 - Vorhangauftragswerk - Google Patents
VorhangauftragswerkInfo
- Publication number
- EP2596171A1 EP2596171A1 EP11732465.7A EP11732465A EP2596171A1 EP 2596171 A1 EP2596171 A1 EP 2596171A1 EP 11732465 A EP11732465 A EP 11732465A EP 2596171 A1 EP2596171 A1 EP 2596171A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- application medium
- opening
- application
- curtain
- applicator
- 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
Links
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 235000011837 pasties Nutrition 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims 1
- 238000009423 ventilation Methods 0.000 claims 1
- 239000000123 paper Substances 0.000 abstract description 3
- 239000002657 fibrous material Substances 0.000 abstract 3
- 239000010410 layer Substances 0.000 description 13
- 238000007766 curtain coating Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000012791 sliding layer Substances 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011177 media preparation Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/40—Filters located upstream of the spraying outlets
-
- 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
- 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 coating a running paper, cardboard or other fibrous web with at least one liquid to pasty application medium, comprising a above the fibrous web and spaced from her machine-wide application head with at least one application medium chamber, in each case at least one opening for the the application head emits the at least one application medium in the form of a free-falling curtain to the fibrous web and wherein the applicator head or the opening is connected to at least one application medium supply line, in the various facilities for collecting or buffering, venting, Filtering, temperature control, flow control, etc. are involved.
- the dosage does not apply because there is no excess. That is, when curtain coating only the amounts are applied, which should ultimately remain on the substrate.
- curtain coating also requires a venting of the coating color, because the curtain produced by the commission and is very sensitive and causes problems due to gas (air) content even before the actual coating. Moreover, in curtain coating plants, it is necessary to keep the system clean. Especially with a job media change a meticulous, time-consuming cleaning is required.
- the application medium in particular pigment-containing coating color in the feed system is finely filtered.
- This is important because of the generally small gap width of the dispensing nozzles, which is usually around 0.2 to 0.4 mm.
- a partial clogging of the nozzles (which is referred to as plugging formation) has fatal consequences, especially in curtain applicators. Namely, there is a beam splitting with contraction of the curtain edges. On the fibrous web these edges lead to a compared to the target repeatedly excessive amount of stain, which is later also rudimentary not dried.
- the negative sequence is that a strong color build-up occurs on subsequent rolls within a machine for the production and / or coating of the fibrous web, which is why too much cleaning effort is necessary.
- At least one filter is provided for the respective application medium, wherein the filter is directly in communication with the opening of the application medium chamber.
- the filter is a so-called "police filter” which is present as the last element in front of this opening to the application medium chamber or in the opening.
- the installation of the filter is dependent on the number and arrangement of the openings or nozzle entries. Thus, it may be appropriate in certain cases, if only one opening and thus only a single filter is present.
- the opening and the filter can be arranged on one of the end faces of the applicator head, ie either on the drive side or on the driver's side of the machine.
- This version is particularly suitable for so-called slot dies (slot dies) and small machine width.
- the opening and thus the filter can also be arranged alternately approximately in the middle of the machine-width application head. This version is especially designed for so-called sliding layer or cascade nozzles (Slide Dies) and small machine width.
- the opening may be at both ends of the applicator head, i. be arranged on the leader and drive side of the machine.
- This version will be chosen for Slot Dies (Slot Dies) with large machine width.
- An alternative embodiment is also that a plurality of openings are arranged distributed over the width of the applicator head. This design is particularly intended for so-called slide dies and larger machine widths.
- the filter is particularly effective if it has a conical filter insert with a small mesh size between 0, 1 and 0.4 mm. This mesh size is adapted approximately to the width of the nozzle gap.
- multiple filters can also be retrofitted into existing paint feed systems.
- the invention is applicable for both single-layer and multi-layer curtain applicators. In the latter case of application, a filter is thus used for one application medium or one coating color or one layer.
- curtain applicator comes as already described both a slot (Slot Die) and a slide layer nozzle (Slide Die) into consideration.
- front side of the applicator head can be connected to at least one bypass line.
- the relatively small proportion of the application medium, which has drained off through the withdrawal line or withdrawal lines, can be returned to the media preparation. This then returns together with fresh application medium to at least one supply line.
- FIG. 5 shows a second variant of the arrangement of a filter according to the invention
- FIG. 1 Shown in the example of Figure 1 is a curtain applicator 1 as part of a fibrous web-making machine or coating machine.
- the curtain coater 1 is used to coat a running paper, cardboard or other fibrous web 2 with a liquid to pasty application medium 3 for the purpose of their refinement or improvement of their printing properties.
- the curtain applicator unit 1 comprises a machine-width application head 4 arranged above the fibrous web 2 and spaced therefrom, with an application medium chamber 7 extending also in the width direction from the left end side 5 to the right end side 6.
- An opening or nozzle inlet 8 opens into this chamber 7 for the one application medium 3.
- this opening 8 is arranged on the left-hand side 5 shown in the figure, which is located on the drive side TS of the machine.
- the application head 4 is the application medium 3 in the form of a free-falling curtain 9 to the fibrous web 2 from.
- the opening 8 is connected on the one hand with a coating medium supply line 10, in which various facilities for collection or buffering, venting, filtering, temperature control, flow control, etc. are included, which are designated as a whole for the purpose of simplifying the illustration with 1 1.
- the application head 4 is provided with a bypass line 12 for discharging the application medium 3.
- a filter 13 is installed immediately before or in the at least one opening or nozzle inlet 8.
- This filter 13 serves as a so-called "police filter", which is arranged as the last element in front of the opening 8 to the application medium chamber 7 and enters into action immediately before the nozzle inlet.
- police filter which is arranged as the last element in front of the opening 8 to the application medium chamber 7 and enters into action immediately before the nozzle inlet.
- Dash-dot lines indicate that, alternatively, an opening 8 'and thus a filter 13' may also be provided on the right-hand side 6 or guide side FS or alternatively approximately in the center of the machine-width application head 4 (marked 8 "and 13") or also on Leader and drive side or evenly distributed over the width of the applicator head 4 (marked with 8 "'and 13"') can be arranged.
- the filter 13 or 13 ', 13 ", 13"' has a conical filter insert 14 with a mesh width Mw between 0, 1 and 0.4 mm, whereby a very fine filtering is achieved.
- bypass line 12 on the driver's side FS which in the example branches off at the front and also extends to the drip pan 17.
- FIG. 2 a gun 4a of a curtain applicator 1 a in the form of a slot die (slot die) is shown with a view in the width direction and transverse direction of the machine.
- a nozzle exit slit 20 of the slit nozzle of the applicator head 4a which has a gap width w of 0.2 to 0.4 mm and from which the curtain 9a drops onto a substrate to be coated or onto the fibrous web 2 running in the direction L and there Application layer or a so-called contour stroke 21 generated.
- FIG. 3 shows an application head 4b of a curtain applicator 1b, which is changed in comparison to FIG.
- This application head 4b is referred to as a sliding layer or as a cascade nozzle.
- the applicator head 4b has in principle for each Application medium 3b to 3n on its own application chamber 7b to 7n, which merges into a respective supply gap with a corresponding outlet nozzle gap 20b to 20n.
- the outlet nozzle gap 20b to 20n in each case branches off from the application medium chamber 7b, 7n and ends at the surface 22 of the application head 4b designed as a sliding layer nozzle.
- the running single-layer or multi-layer curtain 9b then produces a single-layer or multi-layer coating medium layer corresponding to the desired number of application layers on the fibrous web not shown here.
- FIG. 5 shows a possible arrangement of the filter 13 in the opening 8 or through the opening 8. This figure also applies analogously to openings 8 ', 8 ", 8"' and filters 13 ', 13 "and 13'". LIST OF REFERENCE NUMBERS
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010031558A DE102010031558A1 (de) | 2010-07-20 | 2010-07-20 | Vorhangauftragswerk |
PCT/EP2011/062138 WO2012010511A1 (de) | 2010-07-20 | 2011-07-15 | Vorhangauftragswerk |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2596171A1 true EP2596171A1 (de) | 2013-05-29 |
EP2596171B1 EP2596171B1 (de) | 2015-01-21 |
Family
ID=44512826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11732465.7A Active EP2596171B1 (de) | 2010-07-20 | 2011-07-15 | Vorhangauftragswerk |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2596171B1 (de) |
CN (1) | CN103080421B (de) |
DE (1) | DE102010031558A1 (de) |
WO (1) | WO2012010511A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012104933U1 (de) * | 2012-12-18 | 2013-01-14 | Metso Paper, Inc. | Vorrichtung zur Beschichtung einer Faserbahn |
EP3661658A1 (de) | 2017-08-02 | 2020-06-10 | Voith Patent GmbH | Verfahren zur beschichtung einer materialbahn |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5792317A (en) * | 1996-02-07 | 1998-08-11 | Gl&V-Paper Machine Group, Inc. | Wet end starch application |
DE10032430A1 (de) * | 2000-07-04 | 2002-01-17 | Voith Paper Patent Gmbh | Auftragsvorrichtung |
DE20321832U1 (de) * | 2003-09-16 | 2010-12-30 | Voith Patent Gmbh | Vorrichtung zur Streichfarbenaufbereitung |
DE10352807A1 (de) * | 2003-11-12 | 2005-06-23 | Voith Paper Patent Gmbh | Auftragsvorrichtung |
FI118926B (fi) * | 2007-02-15 | 2008-05-15 | Metso Paper Inc | Paperi-/kartonkirainan verhopäällystyslaite |
DE102008000122A1 (de) * | 2007-02-24 | 2008-08-28 | Voith Patent Gmbh | Überwachung eines Auftragsmedienstromes beim Auftrag auf eine Papier-, Karton- oder andere Faserstoffbahn |
DE102007029646A1 (de) * | 2007-06-26 | 2009-01-08 | Voith Patent Gmbh | Auftragsverfahren sowie Vorhangauftragswerk |
DE102008000451A1 (de) * | 2008-02-29 | 2009-09-03 | Voith Patent Gmbh | Streichstation |
DE102008040403A1 (de) * | 2008-07-15 | 2010-01-21 | Voith Patent Gmbh | Vorhang-Auftragswerk |
EP2145693A1 (de) * | 2008-07-16 | 2010-01-20 | Voith Patent GmbH | Überwachung eines Auftragsmedienstromes beim Auftrag auf eine Papier-, Karton- oder andere Faserstoffbahn |
-
2010
- 2010-07-20 DE DE102010031558A patent/DE102010031558A1/de not_active Withdrawn
-
2011
- 2011-07-15 EP EP11732465.7A patent/EP2596171B1/de active Active
- 2011-07-15 CN CN201180036199.8A patent/CN103080421B/zh active Active
- 2011-07-15 WO PCT/EP2011/062138 patent/WO2012010511A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012010511A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010031558A1 (de) | 2012-01-26 |
EP2596171B1 (de) | 2015-01-21 |
CN103080421A (zh) | 2013-05-01 |
CN103080421B (zh) | 2016-06-29 |
WO2012010511A1 (de) | 2012-01-26 |
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