EP0426980B1 - Process and arrangement for operating a coating apparatus - Google Patents
Process and arrangement for operating a coating apparatus Download PDFInfo
- Publication number
- EP0426980B1 EP0426980B1 EP90117798A EP90117798A EP0426980B1 EP 0426980 B1 EP0426980 B1 EP 0426980B1 EP 90117798 A EP90117798 A EP 90117798A EP 90117798 A EP90117798 A EP 90117798A EP 0426980 B1 EP0426980 B1 EP 0426980B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating
- wiper element
- blade
- transmitter
- angular position
- 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.)
- Expired - Lifetime
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- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000005291 magnetic effect Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 2
- 239000004020 conductor Substances 0.000 claims 1
- 230000005670 electromagnetic radiation Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000011324 bead Substances 0.000 abstract description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052753 mercury Inorganic materials 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 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
- 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
- B05C11/04—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 blades
- B05C11/041—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 blades characterised by means for positioning, loading, or deforming the blades
Definitions
- the invention relates to a method for operating a coating device and suitable arrangements therefor.
- GB-A-2 046 137 describes a coating device with a measuring and control device which both regulates and measures the contact pressure of pressure hoses in order to adjust the contact pressure of the coating blade - e.g. if the same is worn or otherwise
- this assumes that when the contact pressure changes, the position of the coating blade in the area of its contact edge on the web or counter roller also changes in a practically proportional manner, but this is not the case, at least not to the extent that precise control of the position the scraper blade (for example, with an accuracy of approximately 0.3 °) is possible.
- the setting accuracy of coating devices can be checked, and the movements of the coating blade can be measured under production conditions.
- This enables a closed control loop for the coating device to be set up, so that under all operating conditions - blade wear, influence of the mating roller, prints from the coating color on the blade - a predetermined target angle of the coating blade can be exactly maintained.
- This constant angle of the coating blade at the tip of the blade is the most important basic requirement in order to maintain constant stroke quality and stroke quantity.
- the aim of the invention is to detect and correct all changes in the blade angle.
- FIG. 1 to 3 show the invention in principle in each case with an arrangement shown in a side view
- FIG. 4 shows the arrangement with the control principle.
- the doctor element which is designed in the known manner as a coating blade, is designated by 1 and its coating edge, by means of which it wipes and doses a coating compound.
- An angle a to a horizontal line H of the coating edge 18 is indicated.
- An inclination switch 2 is used to detect this angle or deviations from this angle. It consists of a glass bulb 3 in which a mercury bead 4 is located. Two parallel wire electrodes 5 and 6 are inserted into the glass bulb with approximately the same length. If the coating blade deviates in its area close to the coating edge 18, the tilt switch 2 also deviates from the exactly horizontal position, so that the mercury bead either moves towards the two electrodes or away from them.
- tilt switches In order to be able to detect both directions of the angular deviation, tilt switches must also be provided in the reverse installation manner (that is, with the two electrodes 5, 6 in a different direction). Tilt switches with both directions of the electrodes can be attached alternately - distributed over the length of the doctor blade 1.
- the tilt switches are attached to a permanent magnet 7 by means of an adhesive 8, which then adheres to the metallic doctor blade in a simple manner.
- an adhesive 8 As is known, such coating blades are made of spring steel.
- FIG. 2 shows a section of a coating device in which a coating blade 1 of the type described in FIG. 1 is installed.
- the counter-roller to which the coating blade 1 can be pressed by means of a pressure hose 11, is indicated by dash-dotted lines.
- the pneumatic pressure hose 11 is held in a holder 9 which is fastened to a supporting beam 28 which carries the entire coating device.
- the doctor blade 1 is pressed against a counter piece 12 by means of a further pneumatic pressure hose 10.
- an opening 14 for coating slip is indicated, which is either applied directly to a roller 15 or onto a paper web guided by the latter and then scraped off the coating edge of the coating blade 1.
- the tilt switch 2 is on an angle-adjustable holding frame which has two mutually angle-adjustable arms 16 and 17, of which one arm 16 is attached to a permanent magnet 7 '.
- the angular position of the arm 17 and thus also of the inclination switch 2 relative to the arm 16 is set by means of a joint 19, which can preferably be designed to be lockable.
- This device is also favorable for particularly tight spaces in the area of the strike edge 18 of the doctor blade 1.
- a sleeve (glass bulb) with an electrolyte fluid could also be used as the tilt switch, a circuit also being closed via electrodes.
- Magnetic liquids or magnetic solids are also suitable.
- the movement is measured with coils or Hall probes.
- FIG. 3 shows an arrangement in which a light-emitting diode 22 is fastened in a cover 23 to an angle piece 21.
- the light possibly bundled by an optical system and emerging through the slot in the cover, is captured, for example, by a diode arrangement (array) 25 or a CCD camera.
- the output signal of these arrangements is then processed in a corresponding manner.
- the angle piece 21 can be, for example, a ferromagnetic, magnetized material, so that it adheres to the metal leaf spring (blade) 1. Its corner angle in the area of the coating blade 1 can be dimensioned according to the specified positions of the horizontal H and the tangent T at the contact point of the coating surface on the counter roller 15.
- the light from this diode - or from a laser - can also be used as a light pointer, or its intensity deviations, which occur with a changed blade angle in a light receiver, such as a photodiode, can be used as a signal.
- FIG. 4 shows a counter roller 15 around which a paper web 32 runs.
- An application roller 33 applies coating compound to the web 32.
- a doctor blade 1 wipes off excess coating material. It is held by a blade holder 35.
- a rod-shaped pressure element 36 presses against the doctor blade 1, so that its free end 37 is pressed into the coating material on the web 32.
- the free blade end 37 is provided on the end face with the blade coating surface 18, which runs essentially parallel to the web surface in the web movement direction. This can be seen from Figures 2 and 3.
- the blade holder 35 is seated on a beam support 30 and, together with the latter, can be pivoted about an axis 41, the pivot axis of which, viewed in side view, is essentially flush with the front blade sweeping surface 18.
- the pivoting takes place via a linkage element 42 by a motor 43 with a gear 44.
- the motor 43 with the gear 44 and the blade holder 35 are seated on a further pivot axis 45 and can be pivoted away from the counter roller 15 about this pivot axis 45.
- one end of a pivot lever 46 is attached to the pivot axis 45, the other end of which carries the first-mentioned pivot axis 41.
- the force exerted by the pressure element 36 on the scraper blade 1 results from the pressure difference between two compressed gas hoses 47.
- the pressure difference is set by a differential pressure measuring device 51 via hose 49, controlled by a control apparatus 60.
- One of the respective angular positions of the coating blade is determined by the signal sensor or receiver 25 1 corresponding signal given via line 50 to a signal processor 51; its output signal reaches a controller 53 via line 52, which is a function of the measured changes in angle Outputs corresponding control signals to the servomotor 43 via a line 54.
- the motor 43 pivots the blade holder 35 about the pivot axis 41 in such a way that the front blade sweeping surface 9 always remains parallel to the web surface, even when the contact pressure changes, as seen in the direction of movement of the web 32.
- the center line of the pivot axis 41 is essentially aligned with the end face of the blade sweeping surface 18.
Landscapes
- Coating Apparatus (AREA)
- Transplanting Machines (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Fixing For Electrophotography (AREA)
- Photographic Developing Apparatuses (AREA)
- Road Signs Or Road Markings (AREA)
- Sink And Installation For Waste Water (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Push-Button Switches (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Threshing Machine Elements (AREA)
- General Preparation And Processing Of Foods (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Manufacturing Of Electric Cables (AREA)
- Saccharide Compounds (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betrieb einer Streicheinrichtung sowie geeignete Anordnungen dafür.The invention relates to a method for operating a coating device and suitable arrangements therefor.
In der GB-A-2 046 137 ist eine Streicheinrichtung mit einem Meß- und Steuergerät beschrieben, das den Anpreßdruck von Druckschläuchen sowohl regelt als auch mißt, um eine Nachstellung des Anpreßdrucks der Streichklinge - z.B. bei Verschleiß derselben oder auch sonst - durchzuführen. Hierbei wird jedoch vorausgesetzt, daß bei einer Änderung des Anpreßdrucks auch eine praktisch proportionale Änderung der Lage der Streichklinge im Bereich ihrer Anliegekante an der Warenbahn oder Gegenwalze erfolgt, was jedoch nicht der Fall ist, jedenfalls nicht in einem Maße, daß eine genaue Regelung der Lage der Streichklinge (z.B. auf etwa 0,3° genau) möglich ist.GB-A-2 046 137 describes a coating device with a measuring and control device which both regulates and measures the contact pressure of pressure hoses in order to adjust the contact pressure of the coating blade - e.g. if the same is worn or otherwise However, this assumes that when the contact pressure changes, the position of the coating blade in the area of its contact edge on the web or counter roller also changes in a practically proportional manner, but this is not the case, at least not to the extent that precise control of the position the scraper blade (for example, with an accuracy of approximately 0.3 °) is possible.
Mit der im folgenden beschriebenen Meßvorrichtung kann die Einstellgenauigkeit von Streicheinrichtungen überprüft werden, und es können unter Produktionsbedingungen die Bewegungen der Streichklinge gemessen werden. Damit läßt sich ein geschlossener Regelkreis für die Streicheinrichtung aufbauen, so daß unter allen Betriebsbedingungen - Klingenverschleiß, Einfluß der Gegenwalze, Drucke von der Streichfarbe auf die Klinge - ein vorgegebener Sollwinkel der Streichklinge genau eingehalten werden kann. Diese Winkelkonstanz der Streichklinge an der Klingenspitze ist die wichtigste Grundvoraussetzung, um konstante Strichqualität und Strichmenge beizubehalten.With the measuring device described below, the setting accuracy of coating devices can be checked, and the movements of the coating blade can be measured under production conditions. This enables a closed control loop for the coating device to be set up, so that under all operating conditions - blade wear, influence of the mating roller, prints from the coating color on the blade - a predetermined target angle of the coating blade can be exactly maintained. This constant angle of the coating blade at the tip of the blade is the most important basic requirement in order to maintain constant stroke quality and stroke quantity.
Die bekannten Streichmaschinenkonstruktionen lösen diese Aufgabe mit unterschiedlicher Genauigkeit.The known coating machine designs solve this problem with different levels of accuracy.
Die dynamischen Einflüsse führen aber zu Veränderungen des Klingenwinkels. Hinzu kommt die Winkeländerung bedingt durch Klingenverschleiß. Ziel der Erfindung ist es, alle Änderungen des Klingenwinkels zu erfassen und auszuregeln.However, the dynamic influences lead to changes in the blade angle. Added to this is the change in angle due to blade wear. The aim of the invention is to detect and correct all changes in the blade angle.
Wenn man die im folgenden beschriebene Meßvorrichtung verwendet, kann man einen gewünschten Sollwinkel genau messen und über eine Regelung unter allen Betriebsbedingungen beibehalten. Da es deshalb nicht mehr nötig ist, die Biegelinie der Streichklinge genau zu kennen und die Streicheinrichtung von der Kinematik her auszulegen (um den Sollwinkel mehr oder weniger genau beizubehalten, wobei alle Störeinflüsse zu größeren Abweichungen führen können), ergeben sich für die Konstruktion neuer Streicheinrichtungen bisher nicht realisierbare Möglichkeiten.When using the measuring device described below, you can precisely measure a desired target angle and keep it under control under all operating conditions. Since it is therefore no longer necessary to know the bending line of the coating blade precisely and to design the coating device from the kinematics (in order to maintain the setpoint angle more or less exactly, whereby all disturbing influences can lead to larger deviations), new coating devices are required for the design Possibilities that were not previously feasible.
Nachfolgend wird die Erfindung anhand der in den Figuren prinzipmäßig dargestellten Ausführungsbeispiele erläutert.The invention is explained below on the basis of the exemplary embodiments illustrated in principle in the figures.
Dabei zeigen Fig. 1 bis 3 die Erfindung jeweils bei einer in Seitenansicht dargestellten Anordung prinzipmäßig und Fig. 4 die Anordnung mit Regelprinzip.1 to 3 show the invention in principle in each case with an arrangement shown in a side view, and FIG. 4 shows the arrangement with the control principle.
In Figur 1 ist das in bekannter Weise als Streichklinge ausgebildete Rakelelement mit 1 und deren Streichkante, mittels derer sie eine Streichmasse abstreicht und dosiert, mit 18 bezeichnet. Es ist ein Winkel a zu einer horizontalen Linie H der Streichkante 18 angegeben. Zur Erfassung dieses Winkels bzw. Abweichungen von diesem Winkel dient ein Neigungsschalter 2. Dieser besteht aus einem Glaskolben 3, in welchem sich eine Quecksilberperle 4 befindet. Es sind zwei parallele Drahtelektroden 5 und 6 in den Glaskolben mit etwa gleicher Länge hineingeführt. Bei einer Abweichung der Streichklinge in ihrem der Streichkante 18 nahen Bereich weicht auch der Neigungsschalter 2 von der genau horizontalen Lage ab, so daß sich die Quecksilberperle entweder in Richtung hin zu den beiden Elektroden oder weg von diesen bewegt. Wenn sich in diesem Fall der Winkel a vergrößert, bewegt sich die Quecksilberperle hin zu den beiden Elektroden 5, 6, von welchen die eine die Anode und die andere die Kathode ist. Es wird auf diese Weise der Stromkreis geschlossen und ein Signal ausgelöst. Um beide Richtungen der Winkelabweichung erfassen zu können, müssen Neigungsschalter auch in umgekehrter Einbauweise (also mit anderer Richtung der beiden Elektroden 5,6 ) vorgesehen werden. Es können abwechselnd - verteilt über die Länge der Streichklinge 1 - Neigungsschalter mit beiden Richtungen der Elektroden angebracht werden.In FIG. 1, the doctor element, which is designed in the known manner as a coating blade, is designated by 1 and its coating edge, by means of which it wipes and doses a coating compound. An angle a to a horizontal line H of the
In diesem Fall ist vorgesehen, daß die Neigungsschalter mittels einem Klebestoff 8 an einem Permanentmagnet 7 befestigt sind, welcher dann auf einfache Weise an der metallischen Streichklinge haftet. Bekanntlich sind solche Streichklingen ja aus Federstahl hergestellt.In this case, it is provided that the tilt switches are attached to a
In Fig. 2 ist ein Ausschnitt einer Streicheinrichtung dargestellt, in welcher eine Streichklinge 1 der in Fig. 1 beschriebenen Art installiert ist. Hier ist die Gegenwalze, an welche die Streichklinge 1 mittels eines Druckschlauchs 11 angepreßt werden kann, mit 15 strichpunktiert angedeutet. Der pneumatische Druckschlauch 11 ist in einer Halterung 9 gehalten, die an einem Tragbalken 28 befestigt ist, der die gesamte Streicheinrichtung trägt. Die Streichklinge 1 wird dabei gegen ein Gegenhaltestück 12 mittels einem weiteren pneumatischen Druckschlauch 10 angepreßt. Zwischen dem Gegenhaltestück 12 und einer Vorderwand 13 ist eine Mündung 14 für Streichmasse angedeutet, die entweder direkt auf eine Walze 15 oder auf eine von dieser geführte Papierbahn aufgetragen und dann von der Streichkante der Streichklinge 1 abgerakelt wird.FIG. 2 shows a section of a coating device in which a
In diesem Fall befindet sich der Neigungsschalter 2 auf einem winkeleinstellbaren Haltegestell, das zwei gegeneinander winkelverstellbare Arme 16 und 17 aufweist, wovon der eine Arm 16 an einem Permanentmagneten 7′ befestigt ist. Mittels Gelenk 19, das vorzugsweise feststellbar ausgeführt sein kann, wird die Winkellage des Armes 17 und damit auch des Neigungsschalters 2 gegenüber dem Arm 16 eingestellt. Man kann diese Einstellung vorher im Labor für jeden Anstellwinkel a der Streichkante 18 der Streichklinge 1 vornehmen und dann einfach die gesamte Signaleinrichtung mittels des Permanentmagneten 7′ an der Streichklinge 1 anheften. Diese Einrichtung ist auch günstig für besonders enge Platzverhältnisse im Bereich der Streichkante 18 der Streichklinge 1.In this case, the
Es kommen auch andere Signalgeber als der dargestellte Neigungsschalter in Frage. Insbesondere ist an Laser zu denken, deren Signal von einer Reihe Fotodioden entsprechend der Winkellage des Laserstrahls registriert werden kann. Auch Signalgeber auf anderer elektromagnetischer oder auch akustischer Basis sind denkbar. Ein einfaches Registrierelement wäre ein an der Streichklinge befestigter Zeiger.There are also other signal transmitters than the tilt switch shown in question. In particular, one should think of lasers whose signal can be registered by a series of photodiodes in accordance with the angular position of the laser beam. Signal generators on another electromagnetic or acoustic basis are also conceivable. A simple registration element would be a pointer attached to the doctor blade.
Man könnte als Neigungsschalter auch eine Hülse (Glaskolben) mit einer Elektrolytflüssigkeit verwenden, wobei auch über Elektroden ein Stromkreis geschlossen wird.A sleeve (glass bulb) with an electrolyte fluid could also be used as the tilt switch, a circuit also being closed via electrodes.
Auch magnetische Flüssigkeiten oder magnetische Festkörper sind geeignet. Dabei wird die Bewegung mit Spulen oder Hallsonden gemessen.Magnetic liquids or magnetic solids are also suitable. The movement is measured with coils or Hall probes.
In Fig. 3 ist eine Anordnung dargestellt, bei der an einem Winkelstück 21 eine Leuchtdiode 22 in einer Abdeckung 23 befestigt ist. Das - eventuell noch durch eine Optik gebündelte, - durch den Schlitz der Abdeckung austretende Licht wird z.B. von einer Diodenanordnung (array) 25 oder einer CCD-Kamera aufgefangen. Das Ausgangssignal dieser Anordnungen wird dann in entsprechender Weise verarbeitet. Das Winkelstück 21 kann z.B. ein ferromagnetischer, magnetisierter Werkstoff sein, so daß er an der metallenen Blattfeder (Klinge) 1 haftet. Sein Eckenwinkel im Bereich der Streichklinge 1 kann nach den angegebenen Lagen der Horizontalen H und der Tangente T im Anliegepunkt der Streichfläche an der Gegenwalze 15 bemessen werden. Das Licht dieser Diode - oder eines Lasers - kann auch als Lichtzeiger benutzt werden, oder es können seine Intensitätsabweichungen, die bei einem geänderten Klingenwinkel in einen Lichtempfänger, wie Photodiode, auftreten, als Signal benutzt werden.3 shows an arrangement in which a light-emitting
Figur 4 zeigt eine Gegenwalze 15, um die eine Papierbahn 32 läuft. Eine Auftragswalze 33 trägt auf die Bahn 32 Beschichtungsmasse auf.FIG. 4 shows a
Eine Schaberklinge 1 streicht überschüssige Beschichtungsmasse ab. Sie wird von einem Klingenhalter 35 gehalten. Ein stangenförmiges Anpreßelement 36 drückt gegen die Schaberklinge 1, so daß deren freies Ende 37 in die Beschichtungsmasse auf der Bahn 32 gedrückt wird. Das freie Klingenende 37 ist stirnseitig mit der Klingenstreichfläche 18 versehen, die in Bahnbewegungsrichtung im wesentlichen parallel zur Bahnoberfläche verläuft. Dies ist aus Figur 2 und 3 ersichtlich.A
Der Klingenhalter 35 sitzt auf einem Balkenträger 30 und ist zusammen mit diesem um eine Achse 41 schwenkbar, deren Schwenkachse, in Seitenansicht gesehen, im wesentlichen mit der stirnseitigen Klingenstreichfläche 18 fluchtet. Die Verschwenkung erfolgt über ein Anlenkelement 42 durch einen Motor 43 mit einem Getriebe 44. Der Motor 43 mit dem Getriebe 44 und dem Klingenhalter 35 sitzen auf einer weiteren Schwenkachse 45 und sind zusammen um diese Schwenkachse 45 von der Gegenwalze 15 wegschwenkbar. Zu diesem Zwecke ist an der Schwenkachse 45 das eine Ende eines Schwenkhebels 46 angebracht, dessen anderes Ende die erstgenannte Schwenkachse 41 trägt.The
Die vom Anpreßelement 36 auf die Schaberklinge 1 ausgeübte Kraft ergibt sich durch die Druckdifferenz zwischen zwei Druckgasschläuchen 47. Die Druckdifferenz wird von einem Differenzdruckmeßgerät 51 über Schlauch 49 eingestellt, gesteuert von einer Regelapparatur 60. Vom Signalaufnehmer oder Empfänger 25 wird ein der jeweiligen Winkellage der Streichklinge 1 entsprechendes Signal über eine Leitung 50 an einen Signalverarbeiter 51 gegeben; dessen Ausgangsignal gelangt über Leitung 52 zu einem Regler 53, der in Abhängigkeit von den gemessenen Winkeländerungen über eine Leitung 54 entsprechende Stellsignale an den Stell-Motor 43 abgibt. Dadurch verschwenkt der Motor 43 den Klingenhalter 35 um die Schwenkachse 41 jeweils derart, daß die stirnseitige Klingen- streichfläche 9 auch bei Änderungen des Anpreßdruckes stets parallel, in Bewegungsrichtung der Bahn 32 gesehen, zur Bahnoberfläche bleibt. Die Mittellinie der Schwenkachse 41 fluchtet im wesentlichen mit der stirnseitgen Klingenstreichfläche 18.The force exerted by the
Claims (11)
- Method of operating a coating device comprising a wiper element (1) which, in its working region in which it is pressed against a counter-roller (15), smoothes and meters coating material with a coating edge (18), is constructed blade-shaped or bar-shaped and, at least in its supporting and clamping region in which it is firmly clamped in a support device, with spring elasticity or throughout as a coating blade, characterized in that, by means of at least one transmitter (2) which is fixed, in the immediate vicinity of the coating edge (18) of the wiper element (1), to this element directly or indirectly via intermediate supports (7; 7'; 16, 17, 19) and is directly influenced by the angular position of the coating blade, signals are transmitted to receivers (25), which are stationary or are directly connected to the wiper mounting (28, 9) or indirectly via support elements, which signals correspond to the angular position of the coating edge (18) or to deviations of the angular position of the coating edge (18) from a set-point value, or signal such a deviation, and that by means of these signals the angular position of the wiper element (1) is regulated.
- Method according to Claim 1, characterized in that the signals are sent without conductors from the transmitters (2) to the receivers (25) as electromagnetic radiation or acoustic radiation or light radiation.
- Method according to Claim 1 or 2, characterized in that a plurality of transmitters or receivers are disposed distributed along the coating edge (18) of the wiper element (1) and a local control of the application force of the coating edge of the wiper element is carried out as a function of the transmitter signal.
- Apparatus for operating a coating device comprising a wiper element (1) which, in its working region in which it is pressed against a counter-roller (15), smoothes and meters coating material with a coating edge (18), is constructed blade-shaped or bar-shaped and, at least in a supporting and clamping region in which it is firmly clamped in a support device, is constructed with spring elasticity or throughout as a coating blade, wherein a control device for keeping constant the angular position of the wiper element relative to the sheet and counter-roller is provided, characterized in that, in the immediate vicinity of the coating edge (18) of the wiper element (1), at least one transmitter (2) influenced directly by the angular position of the coating blade is fixed to the wiper element directly or indirectly via intermediate supports (7; 7'; 16, 17, 19), the signals from which transmitter can be supplied to receivers (25), either stationary or connected directly to the wiper mounting (28, 9) or indirectly via support elements, the signals corresponding to the angular position of the coating edge (18) or deviations of the angular position of the coating edge (18) from a set-point value, or signalling such a deviation.
- Apparatus according to Claim 4, characterized in that an inclination switch or a photodiode or a laser or an ultrasonic source, fixed to the wiper element in the immediate vicinity of its coating edge (18), is provided as transmitter (2).
- Apparatus according to Claim 4 or 5, characterized in that the transmitter (2) is held by means of a permanent magnet (7, 7') to the wiper element (1) or to its support constructed as a leaf spring, either directly or via a holding device (16, 17, 19).
- Apparatus according to Claim 6, characterized in that the transmitter (2) is fixed to an angularly adjustable holder (16, 17) on the wiper element (1) or on its support.
- Apparatus according to one of Claims 4 to 6, characterized in that the transmitter (2) is fixed by means of an angle piece (21) to the wiper element (1).
- Apparatus according to Claim 8, characterized in that the angle piece (21) is magnetic.
- Apparatus according to one of Claims 4 to 9, characterized in that a photodiode serves as transmitter (2), the luminous intensity of which photodiode is varied with regard to a receiver (25) by a light stop (23) according to the inclination of the wiper element, the light stop being mounted immovably relative to the wiper element.
- Apparatus according to one of Claims 4 to 10, characterized in that a diode array (CCD camera) is used as receiver (25).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3937322A DE3937322A1 (en) | 1989-11-09 | 1989-11-09 | METHOD FOR OPERATING A COATING DEVICE |
| DE3937322 | 1989-11-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0426980A2 EP0426980A2 (en) | 1991-05-15 |
| EP0426980A3 EP0426980A3 (en) | 1991-11-06 |
| EP0426980B1 true EP0426980B1 (en) | 1995-03-29 |
Family
ID=6393199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90117798A Expired - Lifetime EP0426980B1 (en) | 1989-11-09 | 1990-09-15 | Process and arrangement for operating a coating apparatus |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5221351A (en) |
| EP (1) | EP0426980B1 (en) |
| JP (1) | JPH03267168A (en) |
| AT (1) | ATE120387T1 (en) |
| BR (1) | BR9005523A (en) |
| CA (1) | CA2029663C (en) |
| DE (2) | DE3937322A1 (en) |
| FI (1) | FI107028B (en) |
| NO (1) | NO176127C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4124988C2 (en) * | 1991-07-27 | 1995-06-22 | Voith Gmbh J M | Coating device with blade adjustment |
| SE469034B (en) * | 1991-09-02 | 1993-05-03 | Valmet Karlstad Ab | DEVICE FOR ADJUSTING THE CRAFTING CONDITIONS |
| SE469035B (en) * | 1991-09-16 | 1993-05-03 | Valmet Karlstad Ab | PROCEDURE AND DEVICE FOR ADJUSTING THE CRAPING CONDITIONS |
| US5242498A (en) * | 1992-08-04 | 1993-09-07 | The Kohler Coating Machinery Corporation | Adjustable blade coater |
| DE4302373A1 (en) * | 1993-01-28 | 1994-08-04 | Voith Gmbh J M | Coating device for running webs of paper or cardboard |
| US5496407A (en) * | 1993-04-19 | 1996-03-05 | Mcaleavey; Michael E. | System and method for monitoring and controlling thickness |
| DE4313889C2 (en) * | 1993-04-28 | 1994-08-25 | Voith Gmbh J M | Coating device for running webs of paper or cardboard |
| US5500641A (en) * | 1994-07-22 | 1996-03-19 | Glens'son | Safety switch device for use in manufacture of round cylindrical vessels |
| DE19715117A1 (en) * | 1997-04-11 | 1998-10-15 | Voith Sulzer Papiermasch Gmbh | Assembly to coat a moving web |
| DE29707991U1 (en) * | 1997-05-03 | 1997-07-03 | EMWE GmbH, 97483 Eltmann | Device for measuring the relative positioning of a doctor blade to a roller of a paper machine |
| DE19731947A1 (en) * | 1997-07-24 | 1999-01-28 | Voith Sulzer Papiermasch Gmbh | Liquid or paste applicator regulation method |
| DE19751098C2 (en) * | 1997-11-18 | 2003-02-20 | Voith Paper Patent Gmbh | Method and device for adjusting an elongate component, which extends in the width direction of a running material web |
| FI4290U1 (en) | 1999-09-14 | 2000-01-19 | Valmet Corp | Paper machine scraper |
| DE10358221A1 (en) * | 2003-12-12 | 2005-07-07 | Voith Paper Patent Gmbh | doctor device |
| US7676298B2 (en) * | 2005-06-08 | 2010-03-09 | Crc For Advanced Composite Structures Limited | Method and apparatus for surface shaping of polymer composite components |
| EP2789734A1 (en) * | 2013-04-09 | 2014-10-15 | Valmet Technologies, Inc. | Assembly for a device of a fiber web production line |
| EP2883999B1 (en) | 2013-12-11 | 2016-04-20 | Garcia Xabier Echeverria | Doctor for a paper machine |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2555669C3 (en) * | 1975-12-11 | 1984-10-18 | J.M. Voith Gmbh, 7920 Heidenheim | Device for scraping off excess coating |
| DE2913421C3 (en) * | 1979-04-04 | 1982-04-29 | J.M. Voith Gmbh, 7920 Heidenheim | Method and device for stripping off excess coating material from a moving web |
| US4493158A (en) * | 1981-10-13 | 1985-01-15 | Koninklijke Nederlandse Papierfabrieken N.V. | Method and apparatus for removing condensate from a cylinder, in particular a cylinder for drying paper |
| SE447545B (en) * | 1985-06-12 | 1986-11-24 | Inventing Ab | SET AND DEVICE FOR LEAF COATING OF A CURRENT MATERIAL COAT |
| CH669996A5 (en) * | 1986-04-14 | 1989-04-28 | Felix Artho | Instrument for measuring surface inclination - has mobile arm with internal source emitting light along arm axis and array of photodetectors giving signal related to arm position |
| US4755806A (en) * | 1987-03-09 | 1988-07-05 | Villarreal Juan M | Movement sensor |
| US4906335A (en) * | 1987-06-08 | 1990-03-06 | Thermo Electron Web System, Inc. | Doctoring apparatus |
| US4884067A (en) * | 1987-08-13 | 1989-11-28 | Talkie Tooter (Canada) Ltd. | Motion and position sensing alarm |
| FI82733C (en) * | 1987-09-07 | 1991-04-10 | Valmet Paper Machinery Inc | VINKELKOMPENSATIONSANORDNING FOER SCHABERBLAD. |
| DE3825816A1 (en) * | 1988-07-29 | 1990-02-01 | Jagenberg Ag | DEVICE FOR CONTINUOUSLY COATING A MATERIAL RAIL THROUGH A COUNTER ROLLER |
| US4919756A (en) * | 1988-08-26 | 1990-04-24 | The Procter & Gamble Company | Method of and apparatus for compensatingly adjusting doctor blade |
-
1989
- 1989-11-09 DE DE3937322A patent/DE3937322A1/en not_active Withdrawn
-
1990
- 1990-09-15 DE DE59008798T patent/DE59008798D1/en not_active Expired - Fee Related
- 1990-09-15 AT AT90117798T patent/ATE120387T1/en not_active IP Right Cessation
- 1990-09-15 EP EP90117798A patent/EP0426980B1/en not_active Expired - Lifetime
- 1990-10-25 BR BR909005523A patent/BR9005523A/en not_active IP Right Cessation
- 1990-10-31 FI FI905384A patent/FI107028B/en not_active IP Right Cessation
- 1990-11-07 JP JP2302288A patent/JPH03267168A/en active Pending
- 1990-11-07 NO NO904836A patent/NO176127C/en unknown
- 1990-11-09 US US07/612,114 patent/US5221351A/en not_active Expired - Fee Related
- 1990-11-09 CA CA002029663A patent/CA2029663C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0426980A2 (en) | 1991-05-15 |
| BR9005523A (en) | 1991-09-17 |
| ATE120387T1 (en) | 1995-04-15 |
| CA2029663A1 (en) | 1991-05-10 |
| US5221351A (en) | 1993-06-22 |
| NO176127B (en) | 1994-10-31 |
| NO904836L (en) | 1991-05-10 |
| NO176127C (en) | 1995-02-08 |
| DE3937322A1 (en) | 1991-05-16 |
| JPH03267168A (en) | 1991-11-28 |
| FI905384A0 (en) | 1990-10-31 |
| EP0426980A3 (en) | 1991-11-06 |
| FI107028B (en) | 2001-05-31 |
| DE59008798D1 (en) | 1995-05-04 |
| NO904836D0 (en) | 1990-11-07 |
| CA2029663C (en) | 1996-11-26 |
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