EP0248985A2 - Coating device for lacquering machines - Google Patents

Coating device for lacquering machines Download PDF

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Publication number
EP0248985A2
EP0248985A2 EP87104176A EP87104176A EP0248985A2 EP 0248985 A2 EP0248985 A2 EP 0248985A2 EP 87104176 A EP87104176 A EP 87104176A EP 87104176 A EP87104176 A EP 87104176A EP 0248985 A2 EP0248985 A2 EP 0248985A2
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EP
European Patent Office
Prior art keywords
roller
coating
coating unit
unit according
application
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
Application number
EP87104176A
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German (de)
French (fr)
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EP0248985A3 (en
EP0248985B1 (en
Inventor
Heinz M. Rau
Hans Dipl.-Ing. Huprich
Wilhelm Götz
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Billhoefer Maschinenfabrik GmbH
Original Assignee
BILLHOFER MASCHF GmbH
Billhofer Maschinenfabrik GmbH
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Application filed by BILLHOFER MASCHF GmbH, Billhofer Maschinenfabrik GmbH filed Critical BILLHOFER MASCHF GmbH
Priority to AT87104176T priority Critical patent/ATE55561T1/en
Publication of EP0248985A2 publication Critical patent/EP0248985A2/en
Publication of EP0248985A3 publication Critical patent/EP0248985A3/en
Application granted granted Critical
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 paint supply device and with a counter roller 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 an application method of the type mentioned at the outset such that novel coating compositions (high solid) of all systems, such as UV lacquers, solvent-based lacquers and dispersions, can be applied at high speeds without scoring and without splashing.
  • the invention provides that the rollers are arranged in such a way that the coating agent is transported essentially vertically downwards from the lacquer supply gap formed between the metering and intermediate rollers and arranged under a nozzle feed device until it is applied 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 relative to 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 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 to ensure in the embodiment of the invention 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, and in addition to the usual drive of the rolls derived from the machine drive of the coating device, an auxiliary drive should be provided for driving the rolls 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, stick firmly to one another in the case of highly viscous, fast-drying lacquers.
  • 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 pointing 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 vertical only after paint transport running below 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 gap 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 nip 10 and the possible additional lacquer storage nip 7 is also arranged, which is required especially then 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)
  • Fertilizers (AREA)
  • Agricultural Chemicals And Associated Chemicals (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 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 paint supply device and with a counter roller 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.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Auftrags­verfahren der eingangs genannten Art so auszugestalten, daß auch neuartige Beschichtungsmittel (High Solid) aller Systeme, wie UV-Lacke, Lösungsmittellacke und Dispersionen mit hohen Geschwindigkeiten riefenfrei und spritzfrei aufgetragen werden können.The invention is therefore based on the object of designing an application method of the type mentioned at the outset such that novel coating compositions (high solid) of all systems, such as UV lacquers, solvent-based lacquers and dispersions, can be applied at high speeds without scoring and without splashing.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß die Walzen derart angeordnet sind, daß das Beschichtungsmittel von dem zwischen der Dosier- und der Zwischenwalze gebildeten, unter einer Düsenzuführeinrichtung angeordneten Lack-Vorratsspalt bis zum Auftragen auf das Substrat im wesentlichen vertikal nach unten transportiert wird.To achieve this object, the invention provides that the rollers are arranged in such a way that the coating agent is transported essentially vertically downwards from the lacquer supply gap formed between the metering and intermediate rollers and arranged under a nozzle feed device until it is applied 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 dispensing with a separate paint reservoir, 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 in again and again, avoiding both the previous spattering and in particular the necessary long paint paths, in which 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 unit 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 relative to 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 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 to ensure in the embodiment of the invention 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, and in addition to the usual drive of the rolls derived from the machine drive of the coating device, an auxiliary drive should be provided for driving the rolls 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, stick firmly to one another in the case of highly viscous, fast-drying lacquers.

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 pointing 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 vertical only after paint transport running below 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 gap 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 nip 10 and the possible additional lacquer storage nip 7 is also arranged, which is required especially then If you do not want a full-surface coating of the substrate, but recesses are to be provided in the coating.

Claims (9)

1. Drei-Walzen-Beschichtungswerk für Lackiermaschinen zum Be­schichten von Bahnen oder Bogen mit einem, ggfs. Aussparungen aufweisenden, Überzug aus hochviskosem Beschichtungsmittel, mit einer zwischen der Auftragswalze und einer Dosierwalze angeordneten Zwischenwalze, einer Lackvorratseinrichtung sowie mit einer Gegenwalze zur Auftragswalze, dadurch ge­kennzeichnet, daß die Walzen (1, 2, 3) derart angeordnet sind, daß das Beschichtungsmittel von dem zwischen der Do­sierwalze (1) und der Zwischenwalze (2) gebildeten, unter einer Düsenzuführeinrichtung (5) angeordneten, Lack-Vorrats­spalt (4) bis zum Auftragen auf das Substrat im wesentlichen vertikal nach unten transportiert wird.1. Three-roller coating unit for coating machines for coating webs or sheets with a, possibly recessed, coating of highly viscous coating agent, with an intermediate roller arranged between the application roller and a metering roller, a lacquer supply device and with a counter roller to the application roller, characterized in that that the rollers (1, 2, 3) are arranged such that the coating agent from the paint supply gap (4) formed between the metering roller (1) and the intermediate roller (2), arranged under a nozzle feed device (5), up to Application to the substrate is transported essentially vertically downwards. 2. Beschichtungswerk nach Anspruch 1, dadurch gekennzeichnet, daß zwischen der Zwischenwalze (2) und der Auftragswalze (3) ein weiterer Lack-Vorratsspalt (7) ausgebildet ist.2. Coating unit according to claim 1, characterized in that a further lacquer storage gap (7) is formed between the intermediate roller (2) and the application roller (3). 3. Beschichtungswerk nach Anspruch 1 oder 2, dadurch gekennzeich­net, daß die Walzenabstände gegeneinander unabhängig ver­stellbar sind.3. Coating unit according to claim 1 or 2, characterized in that the roller spacings are mutually independently adjustable. 4. Beschichtungswerk nach einem der Ansprüche 1 bis 3, gekenn­zeichnet durch eine zwischen dem Substrataustrittsspalt (10) und dem Spalt (7) zur Zwischenwalze (2) angeordnete, auf die Auftragsalze aufsetzbare Verteilerwalze (11).4. Coating unit according to one of claims 1 to 3, characterized by a between the substrate outlet gap (10) and the gap (7) to the intermediate roller (2) arranged, can be placed on the application salts distribution roller (11). 5. Beschichtungswerk nach einem der Ansprüche 1 bis 4, gekenn­zeichnet durch eine Steuer- und Regelvorrichtung zum An- und Abstellen der Walzen (1, 2, 3, 9) und zur Drehzahlregelung derart, daß bei Fehlbogen oder einem Maschinenstopp die Auf­tragswalze (3) unter Aufrechterhaltung des Kontakts zur Zwischenwalze (2) von der Gegenwalze (9) abhebt.5. Coating unit according to one of claims 1 to 4, characterized by a control and regulating device for starting and stopping the rollers (1, 2, 3, 9) and for speed control in such a way that in the event of a missing sheet or a machine stop, the application roller (3) while maintaining contact with the intermediate roller (2) from the counter roller (9). 6. Beschichtungswerk nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Umfangsgeschwindigkeiten der Auf­tragswalze (3) und der Gegenwalze (9) einen Schlupf aufweisen.6. Coating unit according to one of claims 1 to 5, characterized in that the peripheral speeds of the application roller (3) and the counter roller (9) have a slip. 7. Beschichtungswerk nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Durchmesser der Dosierwalze (1), der Zwischenwalze (2) und der Auftragswalze (3) im Verhältnis 1 : 1,25 : 1,585 zueinander stehen.7. Coating unit according to one of claims 1 to 6, characterized in that the diameters of the metering roller (1), the intermediate roller (2) and the application roller (3) are in a ratio of 1: 1.25: 1.585 to one another. 8. Beschichtungswerk nach einem der Ansprüche 1 bis 7, bei dem der Antrieb für die Walzen vom Maschinenantrieb der Lackier­vorrichtung abgeleitet ist, gekennzeichnet durch einen Hilfs­antrieb zum Antreiben der Walzen (1, 2, 3) bei einem Maschinen­stopp.8. Coating unit according to one of claims 1 to 7, in which the drive for the rollers is derived from the machine drive of the coating device, characterized by an auxiliary drive for driving the rollers (1, 2, 3) when the machine stops. 9. Beschichtungswerk nach einem der Ansprüche 1 bis 8, gekenn­zeichnet durch Niveauregler im Bereich der Lack-Vorratsspale (4, 7) zur Regelung des Lackeinlaufs über die Zuführdüsen (6).9. Coating unit according to one of claims 1 to 8, characterized by level control in the region of the lacquer storage tray (4, 7) for regulating the lacquer inlet via the feed 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
DE19863619485 DE3619485A1 (en) 1986-06-10 1986-06-10 COATING PLANT FOR LACQUERING MACHINES
DE3619485 1986-06-10

Publications (3)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715898A1 (en) * 1994-12-09 1996-06-12 OFFICINE SMAC S.p.A. A machine for painting ceramic tiles
CN102267802A (en) * 2010-07-29 2011-12-07 和合科技集团有限公司 Roller coating device for preparing anti-reflective coated photovoltaic glass
EP3075878A1 (en) * 2015-03-31 2016-10-05 ThyssenKrupp AG Method and application device for applying an aqueous treating solution to the surface of a moving web

Families Citing this family (4)

* 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
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

Citations (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
EP0037682A1 (en) * 1980-04-08 1981-10-14 The Wiggins Teape Group Limited Method of and apparatus for 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

Patent Citations (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
EP0037682A1 (en) * 1980-04-08 1981-10-14 The Wiggins Teape Group Limited Method of and apparatus for 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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0715898A1 (en) * 1994-12-09 1996-06-12 OFFICINE SMAC S.p.A. A machine for painting ceramic tiles
CN102267802A (en) * 2010-07-29 2011-12-07 和合科技集团有限公司 Roller coating device for preparing anti-reflective coated photovoltaic glass
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
EP3075878A1 (en) * 2015-03-31 2016-10-05 ThyssenKrupp AG Method and application device for applying an aqueous treating solution to the surface of a moving web

Also Published As

Publication number Publication date
ES2016294B3 (en) 1990-11-01
EP0248985A3 (en) 1989-01-18
DE3619485A1 (en) 1987-12-17
DE3764318D1 (en) 1990-09-20
ATE55561T1 (en) 1990-09-15
EP0248985B1 (en) 1990-08-16

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