EP2284315A1 - Curtain application device - Google Patents
Curtain application device Download PDFInfo
- Publication number
- EP2284315A1 EP2284315A1 EP10007598A EP10007598A EP2284315A1 EP 2284315 A1 EP2284315 A1 EP 2284315A1 EP 10007598 A EP10007598 A EP 10007598A EP 10007598 A EP10007598 A EP 10007598A EP 2284315 A1 EP2284315 A1 EP 2284315A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- curtain coater
- flow
- guide channels
- coater according
- curtain
- 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
- 238000009826 distribution Methods 0.000 claims abstract description 46
- 239000011248 coating agent Substances 0.000 abstract description 7
- 238000000576 coating method Methods 0.000 abstract description 7
- 238000007766 curtain coating Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229920000491 Polyphenylsulfone Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
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
- B05C5/02—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
- 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
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
Definitions
- the invention relates to a curtain applicator for dispensing liquid or pasty application medium in the form of a substantially gravity-related moving curtain or veil on a moving surface, in particular of paper or cardboard.
- Such a curtain coating unit comprises a nozzle chamber, which is supplied to the application medium via a supply line, and which emits the application medium through an outlet opening as a curtain or veil.
- the curtain applicator is located at a distance from the substrate, resulting in the advantage of contactless application.
- a distributor system with two chambers the so-called side-fed dual cavity die
- the coating composition is passed through a first distribution chamber gap into a second distribution chamber.
- the distributor chamber gap must produce a high flow resistance.
- the resulting pressure in the first distribution chamber is significantly greater than the transverse pressure loss in the flow direction.
- the pressure differences in the flow direction of the first distribution chamber are very small compared to the total pressure in the first distribution chamber.
- the pressure distribution and thus the distribution of the volumetric flow density over the distributor chamber gap are thereby approximately uniform with large variations of the volumetric flows and the material parameters.
- the remaining deviations are compensated in the second distribution chamber.
- the distribution chamber gap must be made in small dimensions, which are in the range of 200 to 500 microns.
- the volume flow deviations over the outlet width must not exceed a range of 1 to 2%.
- the flat parts forming the distribution chamber gap must be made with a deviation from the parallelism in a range of ⁇ 1 to 3 microns.
- the length of the distributor chamber gap is usually 20 to 40 mm.
- the production cost of flat parts in such dimensions with the required precision, especially for large outlet widths of 10 to 12 m, is very large and associated with considerable costs.
- 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. adversely again is the requirement of additional actuators for the cross profile adjustment. The associated cost is therefore large.
- a slot die or a cascade die may be used.
- a slot die also referred to as slot die
- a single-layer curtain applicator the curtain forms directly at the exit from the die gap.
- Curtain applicators with a slot nozzle are for example off DE-A1-197 16 647 known.
- 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 an outlet width and is inexpensive to produce.
- a flow gap is replaced by a plurality of guide channels.
- Each guide channel comprises a pipe section, which is preferably a part with a circular cross-section, and a downstream extension of the channel flow, the so-called diffuser of the guide channel.
- the guide channels produce an approximately equal flow resistance as a flow gap.
- the plurality of guide channels replace a flow gap between two distribution chambers.
- a first and a second distribution chamber are then arranged one behind the other in the flow direction, and between them extends an additional flow gap, which is replaced according to the invention by a plurality of guide channels.
- the pipe sections of the guide channels are preferably produced and used as turned parts in a simple manner. Elaborate high-precision flat machine width or output-width parts can be replaced by turned parts.
- the invention relates to a curtain applicator for dispensing application medium in the form of a substantially gravitationally moving curtain to a moving paper or board web.
- FIG. 1 and Fig. 2 show the curtain applicator according to the prior art to 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, as shown in FIG Fig. 1 is shown.
- 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 is designed as a flow gap.
- the flow direction S is perpendicular to the transverse direction of the curtain applicator.
- the length l h and the height 2 h of the flow channel formed as a flow gap determine a flow resistance that is substantially equal in the transverse direction of the output width, since the flow gap is a continuous space.
- the prerequisite for this, however, is a high degree of precision with regard to parallelism of the flow gap walls, so that the gap height 2 h remains the same over the gap length I h .
- the problems set out in the background of the prior art occur in the production of the nozzle body, even if it is composed of two halves as usual.
- FIG. 3 and FIG. 4 show the curtain applicator according to a first embodiment of the prior art differs in that the additional flow channel 2 is decomposed into a plurality of individual guide channels, the inlet side and along the feed width with spaced pipe sections 2.1 to the first distribution chamber. 1 connect.
- the lengths and opening widths of the pipe sections 2.1 can be selected to equalize the flow resistance along the feed width.
- the pipe sections 2.1 In the direction of flow S, the pipe sections 2.1 each pass into a diffuser 2.2 for merging the section streams of the guide channels on the outlet side.
- a remaining partial height of the flow channel 3 may be formed in the form of a machine-wide flow gap to reunite the individual section streams from the individual guide channels, before the entry into the second distribution chamber 4 .
- the second distribution chamber 4 is the application medium via a discharge gap 5 as a curtain.
- the guide channels are preferably arranged in a base body 2.4 of the nozzle body.
- the guide channels with pipe section 2.1 and 2.2 diffuser extending from the first distribution chamber 1 perpendicular to the transverse direction of the commissioned work, i. preferably perpendicular to the cross-machine direction (CD) of the moving paper or board web.
- the guide channels are preferably arranged in a row for this purpose.
- the flow resistances of the guide channels along the discharge width are substantially the same and are at least 1 mWS (9.81 kPa).
- the pipe sections 2.1 of the guide channels preferably have a circular cross-section.
- the first distribution chamber 1 can not have the same length over the feed width. With a supply of the application medium from one end, the distribution chamber 1 tapers towards the other end of the task opposite this task end. A homogenization of the volume flows is improved here if the lengths I r and / or the diameters of the pipe sections 2.1 and / or the distances x between each two guide channels along the outlet width are different. As Fig.
- the number of guide channels per meter of the output width or outlet width is selectable. Preferably, the number of guide channels in the range between 10 and 33. To counteract edge currents, it is advantageous to make the distance x between the guide channels over the outlet width variable.
- Fig. 5 to 7 show preferred details of a guide channel according to the invention.
- the pipe sections 2.1 are preferably designed as exchangeable inserts. These inserts may have a chamfer on the inlet side and / or a rounding R.1.
- the guide channels in the region of the outlet end on a web width b ⁇ 0.3 mm.
- the guide channels can also have 2.2 rounded outlet ends at the respective diffuser.
- the diffusers 2.2 preferably each inlet side a circular cross section, which merges into a rectangular cross section at the outlet.
- the expansion angle ⁇ d of the flow-limiting walls of the diffusers 2.2 are preferably below 8 ° in order to avoid a backflow in the diffuser 2.2.
- the gap height of the circular pipe section 2.1 of the guide channel is 2r 0 and a gap height of the diffuser 2.2 is denoted by 2H. It is advantageous if the diffuser 2.2 is designed so that an extension of the flow-limiting walls is provided.
- Fig. 8 shows a schematic representation of the flow conditions in a guide channel with pipe section 2.1 and 2.2 diffuser.
- the opening angle of the diffuser 2.2 is denoted by ⁇ d .
- R denotes a radial distance.
- the maximum flow velocity at a distance R is given as u max .
- the diffuser 2.2 is preferably designed so that the velocity distribution of the diffuser flow has a high symmetry and a backflow is avoided. Due to the high viscosity of the coating and its relatively low velocity, this is a divergent Jeffery-Hamel flow.
- the angle ⁇ d is preferably less than 25 °.
- the flow-contacting parts of the curtain applicator are mechanically and chemically stressed. It is therefore advantageous to produce the guide channels or the replaceable inserts 2.1 and the base body 2.4, in which the diffuser 2.2 can be integrated, 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 base 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 a material for producing the nozzle body, in particular of the base body 2.4.
- the nozzle body described according to the invention can be used for a curtain coating by the slide-type method or a slot-type method.
- Fig. 9 shows a second embodiment of the curtain applicator for dispensing order medium.
- the nozzle body here has only a first, along a feed width extending manifold chamber 1 and a flow channel 2, which emits the application medium via the outlet gap 5 as a curtain.
- the flow channel 2 is divided into a plurality of individual guide channels, as described above for the first embodiment. The above statements apply accordingly.
Abstract
Description
Die Erfindung betrifft ein Vorhang-Auftragswerk zum Abgeben von flüssigem oder pastösem Auftragsmedium in Form eines sich im Wesentlichen schwerkraftbedingt bewegenden Vorhangs oder Schleiers an einen bewegten Untergrund, insbesondere aus Papier oder Karton.The invention relates to a curtain applicator for dispensing liquid or pasty application medium in the form of a substantially gravity-related moving curtain or veil on a moving surface, in particular of paper or cardboard.
Aus
Es ist schwierig, über die gesamte Arbeitsbreite einen gleichmäßig dicken Auftragsmedium-Vorhang zu erzielen, insbesondere je größer die Arbeitsbreite ist. Hohe Bahngeschwindigkeiten stellen eine weitere hohe Belastung für die Stabilität des Auftragsmedium-Vorhangs dar, da dieser beim Kontakt mit dem Untergrund aufgrund des Unterschieds zwischen der Geschwindigkeit kurz vor dem Auftreffen auf dem Untergrund und der Laufgeschwindigkeit des sich bewegenden Untergrundes gestreckt wird. Zur Erzielung eines qualitativ hochwertigen Auftragsergebnisses ist deshalb die Gleichmäßigkeit des Auftragsmedium-Vorhangs, mit der dieser die Austrittsöffnung der Abgabedüse verlässt, von großer Bedeutung. Dies gilt insbesondere dann, wenn das Auftragsmedium im Wesentlichen fertig dosiert auf den Untergrund gebracht werden soll, d.h. ein "1:1"-Auftrag ist, und wenn zudem nur sehr geringe Mengen an Auftragsmedium auf den Untergrund aufgebracht werden sollen, d.h. geringes Strichgewicht.It is difficult to achieve a uniformly thick application medium curtain over the entire working width, in particular the larger the working width. High web speeds place another high burden on the stability of the application medium curtain as it is stretched on contact with the ground due to the difference between the speed just before landing on the ground and the running speed of the moving ground. To achieve a high-quality order result, therefore, the uniformity of the application medium curtain, with which it leaves the outlet opening of the dispensing nozzle, is of great importance. This is especially true if the application medium is to be brought to the substrate essentially ready-dosed, i. is a "1: 1" job and, in addition, if only very small amounts of application medium are to be applied to the substrate, i. low coating weight.
Um eine möglichst homogene Verteilung bei einer großen Variation der Volumenströme und der Stoffparameter zu erreichen, ist zudem ein Verteilersystem mit zwei Kammern, die sogenannte Side-fed Dual Cavity Die, bekannt, vgl.
Aus
Zur Bildung eines Vorhangs kann eine Schlitzdüse oder eine Kaskadendüse verwendet werden. Bei einer Schlitzdüse, auch als Slot Die bezeichnet, eines einschichtigen Vorhang-Auftragswerks bildet sich der Vorhang unmittelbar am Austritt aus dem Düsenspalt. Vorhang-Auftragswerke mit einer Schlitzdüse sind beispielsweise aus
Aufgabe der Erfindung ist es daher, ein Vorhang-Auftragswerk zu schaffen, das eine hohe Gleichmäßigkeit der Verteilung eines Auftragsmediums über eine Auslaufbreite gewährleistet und dabei kostengünstig herstellbar ist.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 an outlet width and is inexpensive to produce.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of
Hierdurch wird ein Vorhang-Auftragswerk geschaffen, das ohne regeltechnischen Aufwand betrieben werden kann. Erfindungsgemäß wird ein Strömungsspalt ersetzt durch eine Vielzahl von Führungskanälen. Ein jeder Führungskanal umfasst einen Rohrabschnitt, der vorzugsweise ein Teil mit einem kreisförmigen Querschnitt ist, und eine in Strömungsrichtung anschließende Erweiterung der Kanalströmung, den sogenannten Diffusor des Führungskanals. Die Führungskanäle erzeugen einen annähernd gleichen Strömungswiderstand wie ein Strömungsspalt. Die strömungstechnischen Vorteile sind darin zu sehen, dass die Rohrabschnitte in Länge und Öffnungsweite anpassbar sind an eine in Ausgabebreite des Vorhangs sich verjüngende erste Verteilerkammer, wodurch im Wesentlichen gleiche Strömungswiderstände sichergestellt werden. Eine Vergleichmäßigung der Druck- und/oder Mengenverteilung des Auftragsmediums in Querrichtung des Auftragswerks wird so gewährleistet.As a result, a curtain applicator is created, which can be operated without regulatory technical effort. According to the invention, a flow gap is replaced by a plurality of guide channels. Each guide channel comprises a pipe section, which is preferably a part with a circular cross-section, and a downstream extension of the channel flow, the so-called diffuser of the guide channel. The guide channels produce an approximately equal flow resistance as a flow gap. The fluidic advantages are to be seen in the fact that the pipe sections in length and opening width are adaptable to a dispensing width of the curtain in the first tapered distribution chamber, whereby substantially equal flow resistance can be ensured. A homogenization of the pressure and / or quantity distribution of the application medium in the transverse direction of the commissioned work is guaranteed.
Vorzugsweise ersetzen die Vielzahl Führungskanäle einen Strömungsspalt zwischen zwei Verteilerkammern. Eine erste und eine zweite Verteilerkammer sind dann in Strömungsrichtung hintereinander angeordnet, und zwischen diesen erstreckt sich ein zusätzlicher Strömungsspalt, der erfindungsgemäß ersetzt ist durch eine Vielzahl Führungskanäle.Preferably, the plurality of guide channels replace a flow gap between two distribution chambers. A first and a second distribution chamber are then arranged one behind the other in the flow direction, and between them extends an additional flow gap, which is replaced according to the invention by a plurality of guide channels.
Die Rohrabschnitte der Führungskanäle sind vorzugsweise als Drehteile in einfacher Weise herstell- und einsetzbar. Aufwändige hochpräzise flache maschinenbreite bzw. ausgabebreite Teile können durch Drehteile ersetzt werden.The pipe sections of the guide channels are preferably produced and used as turned parts in a simple manner. Elaborate high-precision flat machine width or output-width parts can be replaced by turned parts.
Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.
Die Erfindung wird nachstehend anhand der in den beigefügten Abbildungen dargestellten Ausführungsbeispiele näher erläutert.
-
Fig. 1 zeigt schematisch einen Schnitt eines Düsenkörpers eines Vorhang-Auftragswerks in Querrichtung des Auftragswerks nach dem Stand der Technik, -
Fig. 2 zeigt eine Querschnittsansicht des Düsenkörpers gemäßFig. 1 , -
Fig. 3 zeigt schematisch einen Schnitt eines Düsenkörpers eines Vorhang-Auftragswerks in Querrichtung des Auftragswerks nach der Erfindung, -
Fig. 4 zeigt schematisch eine Querschnittsansicht des Düsenkörpers gemäßFig. 3 , -
Fig. 5 zeigt den Ausschnitt Z gemäßFig. 3 in vergrößerter Darstellung, -
Fig. 6 zeigt den Ausschnitt Y gemäßFig. 3 in vergrößerter Darstellung, -
Fig. 7 zeigt den Ausschnitt W nach A-A gemäßFig. 3 in vergrößerter Darstellung, -
Fig. 8 zeigt schematisch Strömungslinien für einen Führungskanal, -
Fig. 9 zeigt schematisch eine Querschnittsansicht des Düsenkörpers gemäß einem zweiten Ausführungsbeispiel.
-
Fig. 1 shows schematically a section of a nozzle body of a curtain applicator in the transverse direction of the commissioned work according to the prior art, -
Fig. 2 shows a cross-sectional view of the nozzle body according toFig. 1 . -
Fig. 3 shows schematically a section of a nozzle body of a curtain applicator in the transverse direction of the commissioned work according to the invention, -
Fig. 4 schematically shows a cross-sectional view of the nozzle body according toFig. 3 . -
Fig. 5 shows the section Z according toFig. 3 in an enlarged view, -
Fig. 6 shows the section Y according toFig. 3 in an enlarged view, -
Fig. 7 shows the section W according to AAFig. 3 in an enlarged view, -
Fig. 8 schematically shows flow lines for a guide channel, -
Fig. 9 schematically shows a cross-sectional view of the nozzle body according to a second embodiment.
Die Erfindung betrifft ein Vorhang-Auftragswerk zum Abgeben von Auftragsmedium in Form eines sich im Wesentlichen schwerkraftbedingt bewegenden Vorhangs an eine bewegte Papier- oder Kartonbahn.The invention relates to a curtain applicator for dispensing application medium in the form of a substantially gravitationally moving curtain to a moving paper or board web.
Wie
Die Länge Ih und die Höhe 2h des als Strömungsspalt ausgebildeten Strömungskanals bestimmen einen Strömungswiderstand, der in Querrichtung der Ausgabebreite im Wesentlichen gleich ist, da der Strömungsspalt ein durchgehender Raum ist. Vorraussetzung hierfür ist allerdings eine hohe Präzision hinsichtlich Parallelität der Strömungsspaltwände, damit die Spalthöhe 2h über die Spaltlänge Ih gleich bleibt. Die eingangs zum Stand der Technik dargelegten Probleme treten bei der Fertigung des Düsenkörpers auf, auch dann wenn dieser wie üblich aus zwei Hälften zusammengesetzt ist.The length l h and the
Wie
Die Führungskanäle mit Rohrabschnitt 2.1 und Diffusor 2.2 erstrecken sich von der ersten Verteilerkammer 1 senkrecht zur Querrichtung des Auftragswerks, d.h. vorzugsweise senkrecht zur Maschinenquerrichtung (CD) der bewegten Papier- oder Kartonbahn. Die Führungskanäle sind dazu vorzugsweise in einer Zeile angeordnet.The guide channels with pipe section 2.1 and 2.2 diffuser extending from the
Die Strömungswiderstände der Führungskanäle längs der Ausgabebreite sind im Wesentlichen gleich und betragen mindestens 1 mWS (9,81 kPa). Die Rohrabschnitte 2.1 der Führungskanäle weisen vorzugsweise einen kreisförmigen Querschnitt auf. Wie
Die
Wie
Wie
Wie
Der kritische Erweiterungswinkel αdk der die Strömung begrenzenden Wände der Diffusor 2.2 kann nach der Gleichung
bestimmt werden, wobei µ die Viskosität des Auftragsmediums, ρ die Dichte des Auftragsmediums, 2b0=2r0 und V der Volumenstrom pro Meter Auslaufbreite ist.The critical expansion angle α dk of the flow-limiting walls of the diffuser 2.2 can be calculated according to the equation
where μ is the viscosity of the application medium, ρ the density of the application medium, 2b 0 = 2r 0 and V is the volume flow per meter outlet width.
Die strömungsberührten Teile des Vorhang-Auftragswerks werden mechanisch und chemisch beansprucht. Vorteilhaft ist deshalb, die Führungskanäle bzw. die austauschbaren Einsätze 2.1 und den Grundkörper 2.4, in den die Diffusor 2.2 integriert sein können, aus nicht rostenden Stählen herzustellen, wie beispielsweise aus folgenden Werkstoffen wie Molybdänfreie Cr-Ni-Stähle, Molybdänhaltige Cr-Ni-Stähle oder ferritisch-austenistische Duplexstähle.The flow-contacting parts of the curtain applicator are mechanically and chemically stressed. It is therefore advantageous to produce the guide channels or the replaceable inserts 2.1 and the base body 2.4, in which the diffuser 2.2 can be integrated, 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.
Alternativ kann der Grundkörper aus einem thermoplastischen Kunststoff bestehen. Um hohe Anforderungen an die Formstabilität, chemische Beständigkeit, Verhalten gegen Feuchtigkeit (Feuchtigkeitsaufnahme unter 1,5%), Maßhaltigkeit (geringe Quellung unter 0,1%) zu erfüllen, eignen sich die Hochleistungskunststoffe (amorph und teilkristallin) wie beispielsweise PEI, PEEK, PPSU, PTFE, PVDF, POM nach DIN EN ISO 1043-1 als Werkstoff zur Herstellung des Düsenkörpers, insbesondere des Grundkörpers 2.4.Alternatively, the base body may consist of a thermoplastic material. In order to meet high demands on dimensional stability, chemical resistance, resistance to moisture (moisture absorption below 1.5%), dimensional stability (low swelling below 0.1%), the High-performance plastics (amorphous and semi-crystalline) such as PEI, PEEK, PPSU, PTFE, PVDF, POM according to DIN EN ISO 1043-1 as a material for producing the nozzle body, in particular of the base body 2.4.
Der erfindungsgemäß beschriebene Düsenkörper kann für ein Vorhangstreichen nach dem Slide-Type-Verfahren oder einem Slot-Type-Verfahren eingesetzt werden.The nozzle body described according to the invention can be used for a curtain coating by the slide-type method or a slot-type method.
Claims (15)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10007598T PL2284315T3 (en) | 2009-08-10 | 2010-07-22 | Curtain application device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009036853A DE102009036853B3 (en) | 2009-08-10 | 2009-08-10 | Curtain applicator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2284315A1 true EP2284315A1 (en) | 2011-02-16 |
EP2284315B1 EP2284315B1 (en) | 2012-01-04 |
Family
ID=42932662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10007598A Active EP2284315B1 (en) | 2009-08-10 | 2010-07-22 | Curtain application device |
Country Status (12)
Country | Link |
---|---|
US (1) | US20110030613A1 (en) |
EP (1) | EP2284315B1 (en) |
JP (1) | JP2011036856A (en) |
KR (1) | KR20110016404A (en) |
CN (1) | CN101992173A (en) |
AT (1) | ATE540164T1 (en) |
BR (1) | BRPI1002922A2 (en) |
CA (1) | CA2710460A1 (en) |
DE (1) | DE102009036853B3 (en) |
PL (1) | PL2284315T3 (en) |
RU (1) | RU2010133431A (en) |
ZA (1) | ZA201005687B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011118053A1 (en) * | 2011-11-09 | 2013-05-23 | Andritz Küsters Gmbh | Curtain applicator |
DE102013219628B4 (en) * | 2012-09-28 | 2016-08-11 | Via Optronics Gmbh | Applicator element, apparatus and method for applying a layer of viscous material to a substrate and a preform |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012179502A (en) * | 2011-02-28 | 2012-09-20 | Nordson Corp | Slot nozzle assembly and shim plate |
CN104722449A (en) * | 2015-04-09 | 2015-06-24 | 京东方科技集团股份有限公司 | Coating head, coating equipment and manufacturing method of touch display panel |
JP7377641B2 (en) * | 2019-07-31 | 2023-11-10 | タツモ株式会社 | Coating nozzle and coating device |
CN113171889B (en) * | 2021-04-27 | 2022-07-12 | 常州瑞择微电子科技有限公司 | Water curtain spray head |
EP4283039A1 (en) | 2022-05-24 | 2023-11-29 | Andritz Küsters GmbH | Device for smoothing and applying an application medium |
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EP0286563A1 (en) * | 1987-04-09 | 1988-10-12 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Device for producing a liquid curtain |
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DE19716647A1 (en) | 1997-04-21 | 1998-10-22 | Jagenberg Papiertech Gmbh | Method and device for applying a pigment coating ink to a paper or cardboard web |
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DE10057733A1 (en) | 2000-11-22 | 2002-05-23 | Voith Paper Patent Gmbh | Web curtain coating jet applicator has a valve in the jet chamber, as a spring leaf, which divides it into an ante-chamber and a main chamber to give a low coating medium volume for a coherent coating curtain |
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JP4200243B2 (en) * | 1998-03-25 | 2008-12-24 | パナソニック株式会社 | Liquid applicator |
US6419747B1 (en) * | 1999-02-26 | 2002-07-16 | The Procter & Gamble Company | Extrusion die |
US7329437B2 (en) * | 2001-08-17 | 2008-02-12 | Fujifilm Corporation | Coating method and coating apparatus |
DE10231276B4 (en) * | 2002-07-10 | 2004-11-11 | Mitsubishi Hitec Paper Flensburg Gmbh | coating head |
DE102007000782A1 (en) * | 2007-09-27 | 2009-04-02 | Voith Patent Gmbh | Device for applying two layers of curtain application medium on moving paper-, cardboard- or other fibrous web, comprises two applicator nozzles for the medium in gravitational direction, and inclined slide plate arranged below the nozzles |
DE102008041423B4 (en) * | 2008-08-21 | 2015-04-16 | Fmp Technology Gmbh Fluid Measurements & Projects | Coating tool for applying a liquid film to a substrate |
-
2009
- 2009-08-10 DE DE102009036853A patent/DE102009036853B3/en not_active Expired - Fee Related
-
2010
- 2010-07-20 CA CA2710460A patent/CA2710460A1/en not_active Abandoned
- 2010-07-22 AT AT10007598T patent/ATE540164T1/en active
- 2010-07-22 PL PL10007598T patent/PL2284315T3/en unknown
- 2010-07-22 EP EP10007598A patent/EP2284315B1/en active Active
- 2010-08-03 CN CN2010102459790A patent/CN101992173A/en active Pending
- 2010-08-06 US US12/851,984 patent/US20110030613A1/en not_active Abandoned
- 2010-08-09 KR KR1020100076243A patent/KR20110016404A/en not_active Application Discontinuation
- 2010-08-09 BR BRPI1002922-2A patent/BRPI1002922A2/en not_active IP Right Cessation
- 2010-08-09 RU RU2010133431/05A patent/RU2010133431A/en not_active Application Discontinuation
- 2010-08-10 ZA ZA2010/05687A patent/ZA201005687B/en unknown
- 2010-08-10 JP JP2010179780A patent/JP2011036856A/en active Pending
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EP0286563A1 (en) * | 1987-04-09 | 1988-10-12 | Institut De Recherches De La Siderurgie Francaise (Irsid) | Device for producing a liquid curtain |
WO1992022418A1 (en) * | 1991-06-14 | 1992-12-23 | Eastman Kodak Company | Dies |
DE19716647A1 (en) | 1997-04-21 | 1998-10-22 | Jagenberg Papiertech Gmbh | Method and device for applying a pigment coating ink to a paper or cardboard web |
DE19755625A1 (en) | 1997-12-15 | 1999-07-01 | Jagenberg Papiertech Gmbh | Slot nozzle for coating material webs, in particular paper or cardboard webs with pigment coating ink |
DE10057733A1 (en) | 2000-11-22 | 2002-05-23 | Voith Paper Patent Gmbh | Web curtain coating jet applicator has a valve in the jet chamber, as a spring leaf, which divides it into an ante-chamber and a main chamber to give a low coating medium volume for a coherent coating curtain |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011118053A1 (en) * | 2011-11-09 | 2013-05-23 | Andritz Küsters Gmbh | Curtain applicator |
DE102013219628B4 (en) * | 2012-09-28 | 2016-08-11 | Via Optronics Gmbh | Applicator element, apparatus and method for applying a layer of viscous material to a substrate and a preform |
Also Published As
Publication number | Publication date |
---|---|
CN101992173A (en) | 2011-03-30 |
JP2011036856A (en) | 2011-02-24 |
RU2010133431A (en) | 2012-02-20 |
ZA201005687B (en) | 2011-04-28 |
EP2284315B1 (en) | 2012-01-04 |
KR20110016404A (en) | 2011-02-17 |
ATE540164T1 (en) | 2012-01-15 |
US20110030613A1 (en) | 2011-02-10 |
PL2284315T3 (en) | 2012-06-29 |
DE102009036853B3 (en) | 2010-11-11 |
BRPI1002922A2 (en) | 2012-05-29 |
CA2710460A1 (en) | 2011-02-10 |
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