EP3574144A1 - Vorhang-auftragswerk und verfahren zum auftragen eines auftragsmediums - Google Patents
Vorhang-auftragswerk und verfahren zum auftragen eines auftragsmediumsInfo
- Publication number
- EP3574144A1 EP3574144A1 EP18700287.8A EP18700287A EP3574144A1 EP 3574144 A1 EP3574144 A1 EP 3574144A1 EP 18700287 A EP18700287 A EP 18700287A EP 3574144 A1 EP3574144 A1 EP 3574144A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- curtain
- air
- material web
- application
- locking device
- 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
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
-
- 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
- B05C11/06—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 with a blast of gas or vapour
-
- 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
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0254—Coating heads with slot-shaped outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
-
- 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
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
Definitions
- the invention relates to a curtain commissioned work according to the preamble of claim 1 and a method for coating a moving material web, in particular a fibrous web according to the preamble of claim 1 1st
- a coating In the production of fibrous webs such as paper or board webs, a coating, a so-called line, is frequently applied to one or both sides of the material web to improve the surface properties.
- coating has been established by means of a curtain applicator in recent years.
- a thin curtain of a liquid or pasty medium is deposited on the material web under the influence of gravity from a nozzle.
- a disturbance of the thin curtain must be largely avoided.
- Particularly prone is such a curtain for air currents.
- the curtain is particularly sensitive.
- Object of the present invention is therefore to propose a curtain commissioned work, in which the curtain remains largely unimpaired by air currents even at a larger curtain height or a lower order amount of application medium.
- Another object of the invention is to enable maintenance and control of the curtain applicator, so that the curtain is not affected by the movements of the operator or only to a very limited extent.
- the object is completely achieved by a curtain commissioned work according to the characterizing part of claim 1, as well as a method for coating a moving material web according to the characterizing part of claim 11.
- a curtain coater is provided for applying a liquid or pasty application medium on at least one surface of a moving material web, in particular a fibrous web.
- the curtain applicator comprises an application nozzle, in particular a slot nozzle, which is suitable for dispensing a single-layer or multi-layer curtain under the influence of gravity and, if appropriate, influence of further forces on the surface of the material web. Furthermore, the curtain applicator comprises a stripping device which is adapted to keep entrained with the material web drag air away from the curtain. According to the invention, at least one further locking device provided, which is adapted to keep air movements of the ambient air away from the curtain.
- the further locking device according to the invention ensures that the curtain remains largely unaffected by air currents even at a greater curtain height.
- the invention may be possible by the invention to dispense with the usual complete housing of the curtain applicator together with a part of the running material web. This significantly simplifies the design and installation of the curtain applicator, a coating system, and also significantly reduces the costs incurred.
- Application nozzle runs the application medium only a certain distance over a crooked
- the application nozzles may also be suitable for the application of single-layer or multi-layer curtains.
- the invention is not limited to these nozzle types.
- the distance of the opening of the application nozzle from the material web is at least 100 mm, preferably at least 200 mm, particularly preferably at least 300 mm.
- the drop height of the curtain during curtain application is comparatively very large.
- the curtain here is also very susceptible to disturbances, especially for air movements of the ambient air. The advantageous effect of the invention is particularly great in such an embodiment.
- the at least one further blocking device is arranged in the direction of travel of the material web in front of the application nozzle.
- the distance between the further blocking device and the application nozzle is less than 150 cm, in particular less than 100 cm, particularly preferably between 80 cm and 50 cm.
- the risk can be reduced that air movements are generated in the space between the further barrier and the curtain applicator, which can interfere with the curtain.
- the at least one further blocking device comprises a plate which is fastened to or in the immediate vicinity of the application nozzle and extends substantially parallel to the curtain.
- a plate can be viewed in the running direction of the material web, be mounted before or after the curtain.
- a further plate can also be provided, which is attached to or in the immediate vicinity of the application nozzle. In that case, one plate will often be provided in front, and the other plate behind the curtain.
- one or both of these plates are provided at a distance from the curtain of less than 100 mm, preferably less than 50 mm.
- the further blocking device may comprise means for generating an air shield, in particular one or more air nozzles.
- the flow direction of the air of the air shield has a component which points away from the application nozzle and / or has a component which faces away from the material web.
- the blocking effect of the further blocking device is realized in these embodiments in that a targeted air flow is generated, which, however, is directed so that it does not disturb the curtain. Often the placement of such a locking device will not be as close to the curtain as possible, such as the design as a plate to avoid disturbances of the curtain by the air shield itself.
- the air flow of the air shield should be dimensioned so strong that the air movements of the ambient air, which are generated for example by the movement of the operator, do not penetrate through the air shield.
- the air shield will often extend at least over the width of the material web, or the width of the curtain, or go a little beyond.
- Another great advantage of this air shield is that the operator can easily turn off the air shield for repair or maintenance work, or even easy to reach through the air shield.
- An optionally complex disassembly of a permanently installed rigid device can be omitted.
- a suitable collecting vessel or sample carrier can be guided through the air shield to the curtain. For this neither the order process has to be interrupted nor the air shield switched off.
- the at least one further blocking device comprises at least two air nozzles for generating in each case one air shield, wherein one of the air nozzles are provided in front of and another air nozzle after the curtain. (Considered in the direction of the material web).
- the flow direction of the air of the at least two air shields each have a component which is directed towards the material web.
- the two air nozzles are advantageously mounted close to the curtain, in particular it can be provided that one or both of these air shields are provided at a distance from the curtain of less than 100mm, preferably less than 50 mm.
- the nozzles can for example be attached directly to the application nozzle.
- the two air shields or the air nozzles are provided at the same distance from the curtain.
- identical nozzles can be used.
- the two air shields are symmetrical, that is, in particular their direction and / or their air velocity and / or the amount of air are the same, thus it can be prevented, for example, that even at a small distance of the air nozzles to the curtain by the Air shield itself is disturbed.
- Advantageous air velocities for such an embodiment may be between 5 m / s and 50 m / s, in particular between 10 m / s and 15 m / s.
- the object is achieved by a method for applying a liquid or pasty application medium on at least one surface of a moving material web by means of a curtain applicator, wherein from a applicator a single or multilayer curtain under the influence of gravity and possibly influence other forces on the Surface of the web is discharged, characterized in that entrained by the running web drag air is kept away from the curtain by means of a stripping and in addition by means of a further blocking device air currents of the ambient air are kept away from the curtain.
- An advantageous embodiment of the method is characterized in that the application medium through the application nozzle at a flow rate of less than 10 l / min * m, in particular less than 6 l / min * m, more preferably between 2 l / min * m and 5 l / min * m is applied.
- a comparatively thin curtain is generated, which can be influenced particularly easily by air movements of the ambient air.
- the inventively provided further locking device is particularly advantageous. In particular, even if the drop height of the curtain is more than 100mm, more than 200 mm, or even 300mm and more.
- the material web is moved at a speed of between 100 m / min and 800 m / min, in particular between 200 m / min and 600 m / min.
- the composition and / or the thickness of the curtain can be adjusted accordingly, which in turn makes the curtain more susceptible to ambient air.
- the invention is very advantageous, in particular but not exclusively in combination with a height of the curtain of 100mm or more.
- line weights shown here between 8 g / m 2 and 14 g / m 2 are quite common. However, line weights of up to 20 g / m 2 or more can also be realized with the method according to the invention or the device according to the invention.
- the application medium can be, for example, a coating color for coating paper or other fibrous webs.
- the application medium usually contains a certain amount of solids.
- this may be CaCO 3, kaolin and / or ⁇ 2, but other solids are also used.
- the solids content of the application medium is between 55% and 72%.
- the Brookfield viscosity (measured at 100 rpm) of the application medium can be between 100 mPas and 800 mPas, in particular between 300 mPas and 600 mPas.
- the further locking device can be realized by an air shield.
- the treatment may include, for example, filtering and / or dehumidifying and / or heating.
- the speed of the air of the air shield is between 15 m / s and 60 m / s.
- Figure 1 shows a curtain applicator according to one aspect of the invention
- Figures 2 and 2b each show a curtain applicator according to another aspect of the invention.
- FIG. 3 shows a curtain applicator according to a further aspect of the invention.
- the curtain applicator shown in Figure 1 comprises an applicator 1, from which a curtain 2 is applied under the influence of gravity on a material web 4, for example a paper or board web.
- the material web 4 is thereby by means of a deflecting roller 3 diverted that their course is substantially horizontal below the curtain 2.
- the impact point of the curtain is viewed here in the running direction of the material web 4 slightly behind the guide roller 3.
- the entrained with the material web 4 drag air is kept away from the curtain 2 here by a stripping device 5.
- suitable stripping devices 5 for example so-called air knives (air-cut) are known in the industry. Frequently, the stripping device 5 extends to shortly before the point of impact of the curtain.
- the at least one further blocking device 9, 9a, 9b according to the invention is realized in the form of two plates 9a and 9b.
- the two plates 9a, 9b are here fastened directly to the application nozzle. While it is in principle also possible to fix the plates elsewhere, the attachment directly to the application nozzle 1 has the advantage that the distance of the plates 9a, 9b to the curtain 2 is extremely low. Distances of less than 100mm, and even less than 50mm are feasible here. This leads to a very compact design.
- the environment around the application nozzle for example the deflection roller 3 or the stripping device 5, is freely accessible for maintenance work and the like during operation, without the curtain 2 being disturbed by the movement of ambient air.
- FIG. 2 shows a curtain applicator according to a further aspect of the invention.
- the at least one further locking device 9, 9a, 9b realized by an air shield 9.
- the air shield 9 From an air nozzle 6, or a row of nozzles 6, the air exits to produce the air shield 9.
- the flow direction of the air, and thus the orientation of the air shield 9 can go vertically upwards, or be slightly inclined against this direction.
- this inclination will be directed away from the application nozzle 1, and thus also away from the curtain 2, in order to avoid influencing the curtain 2 by the air shield 9.
- the air shield 9 can extend at least over the entire width of the curtain 2 in the cross machine direction.
- the air nozzle 6 or nozzle row 6 is fastened directly to the stripping device 5. This may be advantageous, but depending on the situation, other possibilities of attachment may be possible and useful.
- the distance of the air shield to the application nozzle may be less than 150 cm, in particular less than 100 cm, particularly preferably less than 50 cm. At distances of 80cm and less, for example, it is possible for machine operators to grasp the air shield 9 and perform work such as sampling at the nozzle or curtain.
- this deflecting device 3a may be provided after the curtain 2 .
- the distance of this deflecting device 3a to the curtain 3 may vary in different installations.
- the applicator shown in Figure 2b differs from that of Figure 2 in that it comprises a second locking device 9, which is provided after the curtain 2 and the applicator 1.
- This second locking device 9 is also realized by an air shield 9. From an air nozzle 6, or a row of nozzles 6, the air exits to produce the air shield 9.
- the direction of flow of the air, and thus the orientation of the air shield 9 can go as in the first locking device vertically upwards, or slightly inclined to this direction.
- this inclination will be directed away from the application nozzle 1, and thus also away from the curtain 2, in order to avoid influencing the curtain 2 by the air shield 9.
- the air shield 9 can extend at least over the entire width of the curtain 2 in the cross machine direction.
- this second locking device 9 For the distance of this second locking device 9 from the curtain the same applies as for the first locking device. Again, distances between 80 cm and 50 cm are very beneficial. Due to the particular structural situation, such as the arrangement of the rollers 3a or the guidance of the web 4 but also larger or smaller distances can be selected.
- FIG. 3 shows an embodiment in which the at least one further blocking device comprises at least two air nozzles for generating an air shield in each case.
- the at least one further blocking device comprises at least two air nozzles for generating an air shield in each case.
- one of the air nozzles is provided in front of and another air nozzle after the curtain. (Considered in the direction of the material web).
- the direction of flow of the air of the two air shields each have a component which points towards the material web.
- the two air nozzles are advantageously mounted close to the curtain, the distance to the curtain may be less than 100mm, preferably less than 50 mm.
- the nozzles are attached directly to the applicator nozzle.
- the two air shields, or the air nozzles are provided at the same distance from the curtain. For identical nozzles can be used.
- the two air shields are symmetrical, that is, in particular their direction and / or their air velocity and / or the amount of air are the same. This can be prevented that even at a small distance of the air nozzles to the curtain this is disturbed by the air shield itself.
- Advantageous air velocities for such an embodiment may be between 5 m / s and 50 m / s, in particular between 10 m / s and 15 m / s.
- the invention is not limited thereto.
- the known application nozzles 1 for two or more layers of curtains 2 can be used in a curtain applicator unit according to the invention.
- the application nozzle 1 is shown by way of example in the schematic form of a so-called 'slot die', illustrated embodiments can also be realized with other types of nozzles, for example so-called 'slot dies'.
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paper (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017101373.3A DE102017101373B4 (de) | 2017-01-25 | 2017-01-25 | Vorhang-Auftragswerk und Verfahren zum Auftragen eines Auftragsmediums |
| PCT/EP2018/050622 WO2018137932A1 (de) | 2017-01-25 | 2018-01-11 | Vorhang-auftragswerk und verfahren zum auftragen eines auftragsmediums |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3574144A1 true EP3574144A1 (de) | 2019-12-04 |
| EP3574144B1 EP3574144B1 (de) | 2024-04-17 |
Family
ID=60955064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18700287.8A Active EP3574144B1 (de) | 2017-01-25 | 2018-01-11 | Vorhang-auftragswerk und verfahren zum auftragen eines auftragsmediums |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US11407001B2 (de) |
| EP (1) | EP3574144B1 (de) |
| CN (1) | CN110325683B (de) |
| DE (1) | DE102017101373B4 (de) |
| FI (1) | FI3574144T3 (de) |
| PL (1) | PL3574144T3 (de) |
| WO (1) | WO2018137932A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017101373B4 (de) * | 2017-01-25 | 2022-02-03 | Voith Patent Gmbh | Vorhang-Auftragswerk und Verfahren zum Auftragen eines Auftragsmediums |
| DE102017124280A1 (de) | 2017-10-18 | 2019-04-18 | Voith Patent Gmbh | Vorhang-Auftragswerk und Verfahren zum Auftragen eines Auftragsmediums |
| DE202022105761U1 (de) * | 2021-11-12 | 2022-10-27 | Voith Patent Gmbh | Auftragsvorrichtung |
| DE102022105510B4 (de) * | 2022-03-09 | 2024-01-04 | Voith Patent Gmbh | Auftragsdüse, Auftragswerk und Verfahren |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4128667A (en) * | 1974-01-10 | 1978-12-05 | Polaroid Corporation | Manipulation of coating streams with air foils |
| JP3549075B2 (ja) * | 1995-06-02 | 2004-08-04 | 三菱製紙株式会社 | カーテン塗布装置及び塗布方法 |
| WO1999009253A2 (de) * | 1997-08-15 | 1999-02-25 | Jagenberg Papiertechnik Gmbh | Verfahren und vorrichtung zum auftragen einer pigmentstreichfarbe auf eine papier- oder kartonbahn |
| US5976630A (en) * | 1997-09-29 | 1999-11-02 | Eastman Kodak Company | Method and apparatus for curtain coating |
| JP4609806B2 (ja) * | 2000-09-29 | 2011-01-12 | 株式会社サンツール | カーテンファイバー状スプレー塗布装置 |
| DE10057729A1 (de) * | 2000-11-22 | 2002-05-23 | Voith Paper Patent Gmbh | Vorhang-Auftragsvorrichtung |
| ATE463620T1 (de) * | 2001-05-23 | 2010-04-15 | Voith Patent Gmbh | Auftragsvorrichtung |
| DE20221963U1 (de) * | 2002-09-11 | 2009-10-01 | Voith Patent Gmbh | Vorrichtung zum Auftragen wenigstens eines Vorstrichs und eines Deckstrichs auf eine Materialbahn, insbesondere aus Papier oder Karton |
| DE60209434T2 (de) | 2002-12-12 | 2006-10-19 | Metso Paper, Inc. | Verfahren und Vorrichtung zum Vorhang- Beschichten |
| DE10349117A1 (de) * | 2003-10-22 | 2005-05-25 | Voith Paper Patent Gmbh | Maschine zum Auftragen eines flüssigen oder pastösen Auftragsmediums auf die Oberfläche einer laufenden Materialbahn |
| JP2005161152A (ja) | 2003-12-01 | 2005-06-23 | Voith Paper Patent Gmbh | 塗工装置 |
| DE102004063696A1 (de) * | 2004-12-28 | 2006-07-06 | Voith Paper Patent Gmbh | Auftragsvorrichtung |
| DE102006036450A1 (de) | 2006-08-04 | 2008-02-07 | Voith Patent Gmbh | Auftragsvorrichtung |
| EP2103357B1 (de) * | 2008-03-17 | 2013-02-20 | Ricoh Company, Ltd. | Vorhangbeschichtungsvorrichtung und Vorhangbeschichtungsverfahren |
| DE102008040419A1 (de) | 2008-07-15 | 2010-01-21 | Voith Patent Gmbh | Vorhang-Auftragswerk |
| DE102008040405A1 (de) | 2008-07-15 | 2010-01-21 | Voith Patent Gmbh | Vorhang-Auftragswerk |
| DE102009046095B4 (de) | 2009-10-28 | 2016-07-28 | Valmet Technologies, Inc. | Anordnung zur Kontrolle von den in der Florstreichvorrichtung mit der Bahn geführten Luftströmungen |
| DE102010041713A1 (de) * | 2010-09-30 | 2012-04-05 | Voith Patent Gmbh | Vorrichtung zum direkten oder indirekten Auftrag von flüssigem bis pastösem Auftragsmedium und Verfahren zum Betreiben einer derartigen Vorrichtung |
| DE102011076713A1 (de) | 2011-05-30 | 2012-12-06 | Voith Patent Gmbh | Verfahren zur Herstellung einer holzfreien gestrichenen oder leichtgewichtig gestrichenen Papierbahn |
| CN103321083B (zh) * | 2013-07-19 | 2014-11-19 | 吉安集团有限公司 | 一种帘式涂布白面牛卡纸的生产设备 |
| DE102017101373B4 (de) * | 2017-01-25 | 2022-02-03 | Voith Patent Gmbh | Vorhang-Auftragswerk und Verfahren zum Auftragen eines Auftragsmediums |
| DE102017124280A1 (de) * | 2017-10-18 | 2019-04-18 | Voith Patent Gmbh | Vorhang-Auftragswerk und Verfahren zum Auftragen eines Auftragsmediums |
-
2017
- 2017-01-25 DE DE102017101373.3A patent/DE102017101373B4/de active Active
-
2018
- 2018-01-11 EP EP18700287.8A patent/EP3574144B1/de active Active
- 2018-01-11 FI FIEP18700287.8T patent/FI3574144T3/fi active
- 2018-01-11 WO PCT/EP2018/050622 patent/WO2018137932A1/de not_active Ceased
- 2018-01-11 PL PL18700287.8T patent/PL3574144T3/pl unknown
- 2018-01-11 US US16/480,392 patent/US11407001B2/en active Active
- 2018-01-11 CN CN201880013337.2A patent/CN110325683B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20200038901A1 (en) | 2020-02-06 |
| FI3574144T3 (fi) | 2024-07-04 |
| DE102017101373A1 (de) | 2018-07-26 |
| EP3574144B1 (de) | 2024-04-17 |
| CN110325683A (zh) | 2019-10-11 |
| WO2018137932A1 (de) | 2018-08-02 |
| DE102017101373B4 (de) | 2022-02-03 |
| CN110325683B (zh) | 2022-09-23 |
| PL3574144T3 (pl) | 2024-09-16 |
| US11407001B2 (en) | 2022-08-09 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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