EP0248985B1 - Coating device for lacquering machines - Google Patents

Coating device for lacquering machines Download PDF

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Publication number
EP0248985B1
EP0248985B1 EP87104176A EP87104176A EP0248985B1 EP 0248985 B1 EP0248985 B1 EP 0248985B1 EP 87104176 A EP87104176 A EP 87104176A EP 87104176 A EP87104176 A EP 87104176A EP 0248985 B1 EP0248985 B1 EP 0248985B1
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EP
European Patent Office
Prior art keywords
roller
coating device
coating
lacquer
rollers
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
Application number
EP87104176A
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German (de)
French (fr)
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EP0248985A3 (en
EP0248985A2 (en
Inventor
Heinz M. Rau
Hans Dipl.-Ing. Huprich
Wilhelm Götz
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Billhoefer Maschinenfabrik GmbH
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BILLHOFER MASCHINENFABRIK GmbH
Billhofer Maschinenfabrik GmbH
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Priority to AT87104176T priority Critical patent/ATE55561T1/en
Publication of EP0248985A2 publication Critical patent/EP0248985A2/en
Publication of EP0248985A3 publication Critical patent/EP0248985A3/en
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Publication of EP0248985B1 publication Critical patent/EP0248985B1/en
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    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/086—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith
    • B05C1/0865—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line a pool of coating material being formed between a roller, e.g. a dosing roller and an element cooperating therewith the cooperating element being a roller, e.g. a coating roller
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/02—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles
    • B05C1/025—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to separate articles to flat rectangular articles, e.g. flat sheets
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers

Definitions

  • the invention relates to a three-roller coating unit for coating machines for coating webs or sheets with a, possibly recessed, coating of highly viscous coating material, with an intermediate roller arranged between the application roller and a metering roller, a lacquer supply device with one between the metering roller and the intermediate roller formed, arranged under a nozzle feed device lacquer storage gap and with a counter roller to the applicator roller.
  • roller systems Most of the roller systems known to date are two-roller systems and / or if they are designed as a three-roller coating unit, they have a so-called scoop or immersion roller which is immersed in a paint reservoir. They therefore have a considerable disadvantage with regard to precise dosing, particularly in the high speed range.
  • coating agents with high consistencies i.e. a high solids content and a low solvent content, can hardly be processed on these systems or only at very low speeds.
  • a further disadvantage of these previously known systems is the strong evaporation of the solvents already in the immersion bath and in the roller system, splashing of the coating agent in the immersion rollers and the formation of large paint paths from the coating tank to the application of the coating agent to the substrate in the gap between the application roller and the counter roller.
  • the invention is therefore based on the object of designing a three-roller coating unit of the type mentioned at the outset in such a way that the remaining problems listed above are also solved.
  • rollers are arranged such that the vertical component of the transport direction of the coating agent is only directed downwards all the way from the lacquer storage gap to the substrate.
  • a further lacquer storage gap is formed between the intermediate roller and the application roller, which - in conjunction with an independent adjustability of the roller spacings from one another - results in a particularly favorable, the respective requirements (working speed, type of paint or . The like.) Adjusted possibility of optimizing the function of the coating unit.
  • a further distributor roller which can be placed on the applicator roller and is arranged between the substrate outlet nip between the application roller and the counter roller and the nip to the intermediate roller, to - what When avoiding a lacquer supply gap between the intermediate roller and application roller, it is particularly important to avoid the build-up of larger lacquer beads on the areas of the application roller where the lacquer is not released to the substrate.
  • a control and regulating device for such a coating unit for turning the rollers on and off and for speed control which should also allow differences between the peripheral speeds of the application roller and the counter roller in special cases, is also intended in the embodiment of the invention to ensure that in the event of a missing sheet or a machine stop the applicator roll lifts off the counter roll while maintaining contact with the intermediate roll, in addition to the usual one derived from the machine drive of the coating device, Drive of the rollers an auxiliary drive for driving the rollers should be provided when the machine stops. In this way it can be avoided that when the machine stops, the rollers of the coating unit, which are then normally also stationary, in the case of highly viscous, fast-drying lacquers stick firmly to one another.
  • level controllers can be provided in the area of the paint supply gaps between the rollers.
  • a particularly advantageous roller dimension which allows the paint transport according to the invention, which runs essentially vertically downwards, to be particularly effective, results from the fact that the diameters of the metering roller, the intermediate roller and the application roller are in a ratio of 1: 1.25: 1.585 to stand by each other.
  • 1 denotes the metering roller, 2 the coating roller and 3 the application roller of a three-roller coating unit, a lacquer supply gap 4 being formed between the metering roller 1 and the intermediate roller 2.
  • the coating agent is refilled into this lacquer storage gap through an inlet device 5, preferably in the form of a distributor pipe with outlet nozzles 6 directed downwards, level sensors (not shown) in the lacquer storage gap controlling the supply via the nozzles 6.
  • the three rollers 1 to 3 are essentially offset in a Y-shape so that the axis of the intermediate roller is above that of the application roller and the axis of the metering roller 1 is above that of the intermediate roller 2 such that in connection with the diameters of the rollers essentially vertically downward paint transport takes place.
  • Another lacquer storage nip 7 can be formed between the intermediate roller 2 and the application roller 3. Whether or not such a lacquer storage gap forms depends on the lacquer used in each case, the position of the rollers against one another, the speed of rotation and the extent of the lacquer supply via the nozzles 6.
  • the substrate to be coated is moved between the application roller 3 and the counter-roller 9 in order to be removed in the outlet nip 10 with the aid of preferably gripper-free blowing or suction removal devices and the like via conveyor belts (not shown). to be transported away.
  • a distributor roller 11 that can be placed on the application roller in the area between the substrate exit gap 10 and the possible additional lacquer storage gap 7 is also arranged, which is particularly required If you do not want a full-surface coating of the substrate, but recesses are to be provided in the coating.

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  • Coating Apparatus (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Fertilizers (AREA)

Abstract

1. Three-roller coating device for lacquering machines, for the coating of rails or arches with one coat of highly viscous coating agent, which coat may if required comprise uncoated areas, consisting of an intermediate roller (2) arranged between the applicator roller (3) and a dosing roller (1), a lacquer supply device, with a lacquer storage recess (4) formed between the dosing roller (1) and the intermediate roller (2) and arranged below a nozzle feeder device (5), and with a counter roller (9) to the applicator roller (3), characterised in that the rollers (1, 2, 3) are arranged in such a way that the vertical part of the direction of travel of the coating agent is directed downwards only on its entire journey from the lacquer storage recess (4) to the substrate.

Description

Die Erfindung bezieht sich auf ein Drei-Walzen-Beschichtungswerk für Lackiermaschinen zum Beschichten von Bahnen oder Bogen mit einem, ggfs. Aussparungen aufweisenden, Überzug aus hochviskosem Beschichtungsmaterial, mit einer zwischen der Auftragswalze und einer Dosierwalze angeordneten Zwischenwalze, einer Lackvorratseinrichtung mit einem zwischen der Dosierwalze und der Zwischenwalze gebildeten, unter einer Düsenzuführeinrichtung angeordneten Lack-Vorratsspalt sowie mit einer Gegenwalze zur Auftragswalze.The invention relates to a three-roller coating unit for coating machines for coating webs or sheets with a, possibly recessed, coating of highly viscous coating material, with an intermediate roller arranged between the application roller and a metering roller, a lacquer supply device with one between the metering roller and the intermediate roller formed, arranged under a nozzle feed device lacquer storage gap and with a counter roller to the applicator roller.

Die meisten bisher bekannten Walzensysteme sind Zwei-Walzen-Systeme und/oder sie besitzen bei Ausbildung als Drei-Walzen-Beschichtungswerk eine sog. Schöpf- oder Tauchwalze, die in ein Lackvorratsgefäß eintaucht. Sie haben somit einen erheblichen Nachteil hinsichtlich einer genauen Dosierung insbesondere im hohen Geschwindigkeitsbereich. Darüber hinaus sind Beschichtungsmittel mit hohen Konsistenzen, d.h. einem hohen Festkörperanteil und geringem Lösemittelanteil, auf diesen Systemen kaum oder nur mit sehr geringen Geschwindigkeiten verarbeitbar.Most of the roller systems known to date are two-roller systems and / or if they are designed as a three-roller coating unit, they have a so-called scoop or immersion roller which is immersed in a paint reservoir. They therefore have a considerable disadvantage with regard to precise dosing, particularly in the high speed range. In addition, coating agents with high consistencies, i.e. a high solids content and a low solvent content, can hardly be processed on these systems or only at very low speeds.

Ein weiterer Nachteil dieser vorbekannten Systeme sind das starke Verdunsten der Lösungsmittel schon in der Tauchwanne und im Walzensystem, ein Verspritzen des Beschichtungsmittels bei den Tauchwalzen sowie das Entstehen zur großer Lackwege von der Lackvorratswanne bis zum Auftragen des Beschichtungsmittels auf das Substrat im Spalt zwischen der Auftragswalze und der Gegenwalze.A further disadvantage of these previously known systems is the strong evaporation of the solvents already in the immersion bath and in the roller system, splashing of the coating agent in the immersion rollers and the formation of large paint paths from the coating tank to the application of the coating agent to the substrate in the gap between the application roller and the counter roller.

Das Problem einer relativ großen Lackvorratswanne, in welcher eine sog. Schöpf- oder Tauchwalze eintaucht, und die damit verbundenen vorstehend beschriebenen Probleme, sind zwar bei einer Anordnung der eingangs genannten Art vermieden, wie sie beispielsweise in der französischen Patentanmeldung 2 508 351 vorgeschlagen worden war. Bei dieser wird lediglich ein gewisser Lackvorrat in einen Spalt zwischen einer Dosierwalze und einer Zwischenwalze über eine Düsenzuführeinrichtung eingebracht und von der Zwischenwalze auf die eigentliche Auftragswalze übertragen. Die Anordnung dabei ist jedoch so getroffen, daß der Lack bei seinem Transport vom Vorratsspalt bis auf die zu beschichtende Bahn auf verschlungenen Wegen geführt wird, die teilweise wieder vertikal ansteigen und vom Bogen wegführen. Dadurch ergibt sich aber nicht nur das Problem einer stärkeren Verdunstung durch einen entsprechenden größeren Weg, den der Lackfilm nehmen muß, sondern auch noch die Schwierigkeit, daß er teilweise entgegen der Schwerkraft nach oben transportiert werden muß.The problem of a relatively large lacquer storage trough in which a so-called scoop or immersion roller is immersed, and the associated problems described above, are avoided with an arrangement of the type mentioned at the outset, as was proposed, for example, in French patent application 2 508 351 . In this case, only a certain supply of lacquer is introduced into a gap between a metering roller and an intermediate roller via a nozzle feed device and is transferred from the intermediate roller to the actual application roller. However, the arrangement is such that the paint is guided on winding paths as it is transported from the supply gap to the web to be coated, some of which rise vertically again and lead away from the sheet. This not only gives rise to the problem of greater evaporation through a correspondingly larger path that the lacquer film has to take, but also the difficulty that it has to be partially transported upward against gravity.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Drei-Walzen-Beschichtungswerk der eingangs genannten Art so auszugestalten, daß auch die oben aufgeführten restlichen Probleme gelöst sind.The invention is therefore based on the object of designing a three-roller coating unit of the type mentioned at the outset in such a way that the remaining problems listed above are also solved.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß die Walzen derart angeordnet sind, daß die vertikale Komponente der Transportrichtung des Beschichtungsmittels auf seinem ganzen Weg von dem Lack-Vorratsspalt bis zum Substrat nur nach unten gerichtet ist.To achieve this object, it is provided according to the invention that the rollers are arranged such that the vertical component of the transport direction of the coating agent is only directed downwards all the way from the lacquer storage gap to the substrate.

Durch das Wegfallen eines gesonderten Lackvorratsgefäßes, in welches eine Tauch- oder Schöpfwalze teilweise eintaucht, um den Lack über eine Zwischenwalze an die Auftragswalze abzugeben, werden bereits eine ganze Reihe von Schwierigkeiten vermieden, die vorstehend angesprochen sind. Abgesehen davon, daß das Lackvorratsgefäß insgesamt nicht mehr benötigt wird, sondern - selbstverständlich mit Hilfe stirnseitiger Abdichtscheiben - der Spalt zwischen der in der vorliegenden Anmeldung als Dosierwalze angesprochenen ersten Walze und der Zwischenwalze quasi als Lackvorratsgefäß benutzt wird, dem über eine darüber angeordnete Rohrleitung mit Düsen immer wieder Lack zugeführt wird, vermeidet man sowohl die bisherige Spritzerbildung und insbesondere aber die notwendigen langen Lackwege, bei denen der Lack nicht auf kürzestem Weg und immer von oben nach unten, sondern auf sehr langen Wegen und auch teilweise entgegen der Schwerkraft nach oben auf den rotierenden Walzen transportiert wurde.By eliminating a separate paint storage vessel, in which a dipping or scooping roller is partially immersed, in order to deliver the paint to the application roller via an intermediate roller, a whole series of difficulties which have been mentioned above are avoided. Apart from the fact that the paint reservoir is no longer required overall, but - of course with the help of sealing washers on the face - the gap between the first roller referred to in the present application as the metering roller and the intermediate roller is used as a lacquer reservoir, which is arranged via a pipeline with nozzles arranged above it Paint is fed again and again, avoiding both the previous spatter formation and in particular the long paint paths required, where the paint is not on the shortest path and always from top to bottom, but on very long paths and also partly against gravity upwards rotating rollers was transported.

Mit diesen vorstehenden Vorteilen einher geht die Möglichkeit eines universellen Einsatzes eines solchen Beschichtungswerks für sämtliche Lackarten, einer Qualitätsveredelung und hoher Produktionsleistungen verbunden mit großem Bedienungskomfort.With the above advantages, there is the possibility of universal use of such a coating plant for all types of paint, quality finishing and high production output combined with great ease of use.

In Ausgestaltung der Erfindung kann dabei weiter vorgesehen sein, daß zwischen der Zwischenwalze und der Auftragswalze ein weiterer Lack-Vorratsspalt ausgebildet ist, wodurch sich - in Verbindung mit einer unabhängigen Verstellbarkeit der Walzenabstände gegeneinander - eine besonders günstige, den jeweiligen Anforderungen (Arbeitsgeschwindigkeit, Lackart od.dgl.) angepaßte Möglichkeit einer Optimierung der Funktion des Beschichtungswerks ergibt.In an embodiment of the invention it can further be provided that a further lacquer storage gap is formed between the intermediate roller and the application roller, which - in conjunction with an independent adjustability of the roller spacings from one another - results in a particularly favorable, the respective requirements (working speed, type of paint or . The like.) Adjusted possibility of optimizing the function of the coating unit.

Insbesondere bei Einsatz eines erfindungsgemäßen Beschichtungswerks zur Lackierung oder Kaschierung von Substraten mit Aussparungen hat es sich dabei als besonders zweckmäßig erwiesen, eine weitere, zwischen dem Substrataustrittsspalt zwischen Auftragswalze und Gegenwalze und dem Spalt zur Zwischenwalze angeordnete, auf die Auftragswalze aufsetzbare Verteilerwalze vorzusehen, um - was bei Vermeidung eines Lack-Vorratsspalts zwischen Zwischenwalze und Auftragswalze besonders wichtig ist - ein Sichaufbauen größerer Lackwulste an den Bereichen der Auftragswalze zu vermeiden, an denen der Lack nicht an das Substrat abgegeben wird.In particular, when using a coating unit according to the invention for painting or laminating substrates with cutouts, it has proven to be particularly expedient to provide a further distributor roller which can be placed on the applicator roller and is arranged between the substrate outlet nip between the application roller and the counter roller and the nip to the intermediate roller, to - what When avoiding a lacquer supply gap between the intermediate roller and application roller, it is particularly important to avoid the build-up of larger lacquer beads on the areas of the application roller where the lacquer is not released to the substrate.

Eine Steuer- und Regelvorrichtung für ein derartiges Beschichtungswerk zum An- und Abstellen der Walzen und zur Drehzahlregelung, welches für Spezialfälle auch Unterschiede zwischen den Umfangsgeschwindigkeiten der Auftragswalze und der Gegenwalze ermöglichen sollte, soll in Ausgestaltung der Erfindung auch sicherstellen, daß bei Fehlbogen oder einem Maschinenstopp die Auftragswalze unter Aufrechterhaltung des Kontakts zur Zwischenwalze von der Gegenwalze abhebt, wobei darüber hinaus neben dem üblichen, vom Maschinenantrieb der Lackiervorrichtung abgeleiteten, Antrieb der Walzen ein Hilfsantrieb zum Antreiben der Walzen bei einem Maschinenstopp vorgesehen sein sollte. Auf diese Weise läßt sich vermeiden, daß bei einem Maschinenstopp die dann normalerweise ebenfalls stillstehenden Walzen des Beschichtungswerks bei hochviskosen schnelltrocknenden Lacken fest miteinander verkleben.A control and regulating device for such a coating unit for turning the rollers on and off and for speed control, which should also allow differences between the peripheral speeds of the application roller and the counter roller in special cases, is also intended in the embodiment of the invention to ensure that in the event of a missing sheet or a machine stop the applicator roll lifts off the counter roll while maintaining contact with the intermediate roll, in addition to the usual one derived from the machine drive of the coating device, Drive of the rollers an auxiliary drive for driving the rollers should be provided when the machine stops. In this way it can be avoided that when the machine stops, the rollers of the coating unit, which are then normally also stationary, in the case of highly viscous, fast-drying lacquers stick firmly to one another.

Zur Steuerung des Lackeinlaufs über die Zuführdüsen können im Bereich der Lack-Vorratsspalte zwischen den Walzen Niveauregler vorgesehen sein.In order to control the paint feed via the feed nozzles, level controllers can be provided in the area of the paint supply gaps between the rollers.

Eine besonders vorteilhafte Walzenabmessung, die den erfindungsgemäßen im wesentlichen vertikal nach unten verlaufenden Lacktransport besonders wirksam werden läßt, ergibt sich gemäß einem weiteren Merkmal der Erfindung dadurch, daß die Durchmesser der Dosierwalze, der Zwischenwalze und der Auftragswalze im Verhältnis 1 : 1,25 : 1,585 zueinander stehen.According to a further feature of the invention, a particularly advantageous roller dimension, which allows the paint transport according to the invention, which runs essentially vertically downwards, to be particularly effective, results from the fact that the diameters of the metering roller, the intermediate roller and the application roller are in a ratio of 1: 1.25: 1.585 to stand by each other.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels sowie anhand der Zeichnung. Dabei zeigen:

  • Fig. 1 eine schematische Seitenansicht des erfindungsgemäßen Beschichtungswerks und
  • Fig. 2 eine Variante des Beschichtungswerks nach Fig. 1 mit zusätzlicher Verteilerwalze.
Further advantages, features and details of the invention result from the following description of an exemplary embodiment and from the drawing. Show:
  • Fig. 1 is a schematic side view of the coating unit according to the invention and
  • Fig. 2 shows a variant of the coating unit according to Fig. 1 with an additional distributor roller.

In den Figuren ist mit 1 die Dosierwalze, mit 2 die Beschichtungswalze und mit 3 die Auftragswalze eines Drei-Walzen-Beschichtungswerks bezeichnet, wobei zwischen der Dosierwalze 1 und der Zwischenwalze 2 ein Lack-Vorratsspalt 4 gebildet ist. In diesen Lack-Vorratsspalt wird durch eine Einlaufvorrichtung 5, vorzugsweise in Form eines Verteilerrohrs mit nach unten gerichteten Austrittsdüsen 6, das Beschichtungsmittel jeweils nachgefüllt, wobei nicht dargestellte Niveaufühler im Lack-Vorratsspalt die Zufuhr über die Düsen 6 steuern. Die drei Walzen 1 bis 3 sind im wesentlichen Y-förmig so übereinander versetzt angeordnet, daß die Achse der Zwischenwalze über der der Auftragswalze und die Achse der Dosierwalze 1 über der der Zwischenwalze 2 liegt derart, daß in Verbindung mit den Durchmessern der Walzen ein im wesentlichen vertikal nur nach unten verlaufender Lacktransport stattfindet. Zwischen der Zwischenwalze 2 und der Auftragswalze 3 kann ein weiterer Lack-Vorratsspalt 7 ausgebildet sein. Ob sich ein derartiger Lack-Vorratsspalt ausbildet oder nicht, hängt von dem jeweils verwendeten Lack, der Anstellung der Walzen gegeneinander, der Drehgeschwindigkeit und dem Ausmaß der Lackzufuhr über die Düsen 6 ab.In the figures, 1 denotes the metering roller, 2 the coating roller and 3 the application roller of a three-roller coating unit, a lacquer supply gap 4 being formed between the metering roller 1 and the intermediate roller 2. The coating agent is refilled into this lacquer storage gap through an inlet device 5, preferably in the form of a distributor pipe with outlet nozzles 6 directed downwards, level sensors (not shown) in the lacquer storage gap controlling the supply via the nozzles 6. The three rollers 1 to 3 are essentially offset in a Y-shape so that the axis of the intermediate roller is above that of the application roller and the axis of the metering roller 1 is above that of the intermediate roller 2 such that in connection with the diameters of the rollers essentially vertically downward paint transport takes place. Another lacquer storage nip 7 can be formed between the intermediate roller 2 and the application roller 3. Whether or not such a lacquer storage gap forms depends on the lacquer used in each case, the position of the rollers against one another, the speed of rotation and the extent of the lacquer supply via the nozzles 6.

In Richtung des Pfeils 8 wird das zu beschichtende Substrat zwischen die Auftragswalze 3 und die Gegenwalze 9 bewegt, um im Austrittsspalt 10 mit Hilfe von vorzugsweise greiferlosen Blas- oder Saugabnahmevorrichtungen abgenommen und über nicht dargestellte Förderbänder od.dgl. abtransportiert zu werden. Bei dem in Fig. 2 dargestellten Beschichtungswerk, welches im übrigen wie das in Fig. 1 aufgebaut ist, ist zusätzlich eine auf die Auftragswalze im Bereich zwischen dem Substrataustrittsspalt 10 und dem möglichen zusätzlichen Lack-Vorratsspalt 7 aufsetzbare Verteilerwalze 11 angeordnet, die besonders dann benötigt wird, wenn man nicht eine vollflächige Beschichtung des Substrats wünscht, sondern in der Beschichtung Aussparungen vorgesehen sein sollen.In the direction of arrow 8, the substrate to be coated is moved between the application roller 3 and the counter-roller 9 in order to be removed in the outlet nip 10 with the aid of preferably gripper-free blowing or suction removal devices and the like via conveyor belts (not shown). to be transported away. In the coating unit shown in FIG. 2, which is otherwise constructed like that in FIG. 1, a distributor roller 11 that can be placed on the application roller in the area between the substrate exit gap 10 and the possible additional lacquer storage gap 7 is also arranged, which is particularly required If you do not want a full-surface coating of the substrate, but recesses are to be provided in the coating.

Claims (9)

1. Three-roller coating device for lacquering machines, for the coating of rails or arches with one coat of highly viscous coating agent, which coat may if required comprise uncoated areas, consisting of an intermediate roller (2) arranged between the applicator roller (3) and a dosing roller (1), a lacquer supply device, with a lacquer storage recess (4) formed between the dosing roller (1) and the intermediate roller (2) and arranged below a nozzle feeder device (5), and with a counter roller (9) to the applicator roller (3), characterised in that the rollers (1, 2, 3) are arranged in such a way that the vertical part of the direction of travel of the coating agent is directed downwards only on its entire journey from the lacquer storage recess (4) to the substrate.
2. Coating device according to claim 1, characterised in that a further lacquer storage recess (7) is formed between the intermediate roller (2) and the applicator roller (3).
3. Coating device according to claim 1 or 2, characterised in that the distances of the rollers from each other may be adjusted independently.
4. Coating device according to one of claims 1 to 3, characterized by a distributor roller (11), arranged between the substrate exit (10) and the recess (7) to the intermediate roller (2), which distributor roller may be brought into contact with the applicator roller.
5. Coating device according to one of claims 1 to 4, characterised by a control and adjustment device for the positioning and release of the rollers (1, 2, 3, 9) and for the adjustment of the rev/min such that in the event of a defective arch or a machine stoppage, the applicator roller (3) is lifted off the counter roller (9) but contact is maintained with the intermediate roller (2).
6. Coating device according to one of claims 1 to 5, characterised in that the circumferential speeds of the applicator roller (3) and the counter roller (9) produce a slip.
7. Coating device according to one of claims 1 to 6, characterised in that the diameter of the dosing roller (1), the intermediate roller (2) and the applicator roller (3) have a ratio to each other of 1:1.25:1.585.
8. Coating device according to one of claims 1 to 7, characterised in that the drive for the rollers is derived from the machine drive of the lacquering device and that in addition an accessory drive is provided to drive the rollers (1, 2, 3) in the event of a machine stoppage.
9. Coating device according to one of claims 1 to 8, characterised by a level regulator in the area of the lacquer storage recesses (4, 7) to regulate the flow of lacquer through the supply nozzles (6).
EP87104176A 1986-06-10 1987-03-21 Coating device for lacquering machines Expired - Lifetime EP0248985B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104176T ATE55561T1 (en) 1986-06-10 1987-03-21 COATING PLANT FOR COATING MACHINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3619485 1986-06-10
DE19863619485 DE3619485A1 (en) 1986-06-10 1986-06-10 COATING PLANT FOR LACQUERING MACHINES

Publications (3)

Publication Number Publication Date
EP0248985A2 EP0248985A2 (en) 1987-12-16
EP0248985A3 EP0248985A3 (en) 1989-01-18
EP0248985B1 true EP0248985B1 (en) 1990-08-16

Family

ID=6302689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104176A Expired - Lifetime EP0248985B1 (en) 1986-06-10 1987-03-21 Coating device for lacquering machines

Country Status (4)

Country Link
EP (1) EP0248985B1 (en)
AT (1) ATE55561T1 (en)
DE (2) DE3619485A1 (en)
ES (1) ES2016294B3 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2003789A6 (en) * 1987-03-20 1988-11-16 Barberan Albiac Jesus Paint-application machine
DE4327421C2 (en) * 1993-08-14 1999-05-20 Georgios Lukidis Device for coloring structured, flat parts
IT1269277B (en) * 1994-12-09 1997-03-26 Smac Srl Off MACHINE FOR THE GLAZE DECORATION OF CERAMIC TILES
DE29818148U1 (en) 1998-10-10 2000-02-17 MAN Roland Druckmaschinen AG, 63075 Offenbach Coating machine for finishing sheet material
DE102008012072B3 (en) * 2008-02-29 2009-08-13 Windmöller & Hölscher Kg An apparatus and method for the format application of glue to workpieces
CN102267802B (en) * 2010-07-29 2013-07-17 和合科技集团有限公司 Roller coating device for preparing anti-reflective coated photovoltaic glass
DE102015104974B3 (en) * 2015-03-31 2016-06-16 Thyssenkrupp Ag Method and application device for applying an aqueous treatment solution to the surface of a moving belt and apparatus for carrying out the method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645201A (en) * 1951-04-12 1953-07-14 Combined Locks Paper Co Apparatus for coating paper
DE1652321A1 (en) * 1967-06-03 1971-02-18 Feldmuehle Ag Roller coater
AU539577B2 (en) * 1980-04-08 1984-10-04 Wiggins Teape Group Limited, The Applying a coating to a web of sheet material
DE3105020A1 (en) * 1981-02-12 1982-09-02 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach DEVICE FOR APPLYING A FLUID, IN PARTICULAR LACQUERS ON PRINTED SHEETS OR COATS
FR2508351A1 (en) * 1981-06-25 1982-12-31 Chambre Jean Paul Feed for applying glue to moving paper strip - has gap between flattening rollers to feed glue transferred to third roller for treating paper

Also Published As

Publication number Publication date
EP0248985A3 (en) 1989-01-18
EP0248985A2 (en) 1987-12-16
ES2016294B3 (en) 1990-11-01
DE3619485A1 (en) 1987-12-17
ATE55561T1 (en) 1990-09-15
DE3764318D1 (en) 1990-09-20

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