EP0458035B1 - Device for applying a liquid coating product on sheet-like materials - Google Patents

Device for applying a liquid coating product on sheet-like materials Download PDF

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Publication number
EP0458035B1
EP0458035B1 EP91104505A EP91104505A EP0458035B1 EP 0458035 B1 EP0458035 B1 EP 0458035B1 EP 91104505 A EP91104505 A EP 91104505A EP 91104505 A EP91104505 A EP 91104505A EP 0458035 B1 EP0458035 B1 EP 0458035B1
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EP
European Patent Office
Prior art keywords
web
roll
application
coating
roller
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
EP91104505A
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German (de)
French (fr)
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EP0458035A2 (en
EP0458035A3 (en
Inventor
Anton Plomer
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JM Voith GmbH
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JM Voith GmbH
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Publication of EP0458035A3 publication Critical patent/EP0458035A3/en
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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
    • 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
    • B05C1/083—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 being passed between the coating roller and one or more backing rollers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device is known from DE-A-34 17 487.
  • two press rolls which are horizontally opposed to each other, are provided in to transfer the coating mass applied between them to the surface of the material.
  • a device carrying an elastic doctor blade holder is used here as the application unit, a roller doctor blade provided with circumferential grooves being used as the doctor element.
  • the order quantities can be 2 to 3 g / m2 per side of the web.
  • the object of the invention is to provide a device in which both application options, that is to say with a doctor blade applicator with sump on the one hand and applicator with a nozzle chamber on the other, are provided with little effort.
  • a certain web guide can also achieve that at most only a small wrap angle of the rollers is required.
  • a large wrap angle could be a major disadvantage if absorbent paper is used.
  • a pivotable support frame is also provided for a deflection roller arranged above the upper roller. Further deflection rollers guide the web into the basement below the operator level of the lower roller in the event that the web does not have to pass through the press nip between the two rollers. This applies to the coating variant when the nozzle roller of the lower roller is used.
  • coating slips are applied - generally with a coat weight of more than 7 g / m2.
  • This also gives the possibility of providing an additional drying device, for example an infrared dryer, for the side of the web coated with the coating slip, above the arrangement for coating.
  • a lower counter roller is provided for the web 1 shown in broken lines, to which two applicator units 5 and 6 are assigned.
  • the right application unit has a so-called nozzle chamber 10, which is generally combined with the doctor bar 8 and which feeds the application mass directly under superatmospheric pressure to the web.
  • a doctor blade is generally used as the doctor element, and excess coating slip generally flows into a collecting trough, counter to the direction of travel of the material web, via an overflow gap formed on the counter roller 1. This means that any application quantities above 4 to 5 g / m2 to approximately 15 g / m2 can be applied to each side of the web, preferably made of paper or cardboard.
  • This application unit is therefore on the side of the counter roller 1, on which the material web of the coating station is preferably fed from the paper machine.
  • the material web is guided over deflection rollers 25 to 28 partially below the foundation 54 forming operator level A - that is, in the basement - so that it thus runs towards the nozzle application unit from the other side.
  • an applicator unit 6 with a doctor blade rod 15 carried by an elastic holder and provided with circumferential grooves.
  • the elastic holder together with the doctor blade rod 15 and the support beam for these two elements form a sump of flowable on the outer surface of the counter roller 1
  • Application mass of a consistency of at most 8%, such as glue.
  • the back of the web is thus coated - ie more or less impregnated, for example for the so-called flat position correction - when the coating slip is applied by the nozzle application device 5 on the other side (front) of the web.
  • the then existing web guidance corresponding to the dash-dotted line allows an additional drying device 45 to be provided for the side of the material web above the coating station, which has the considerably thicker coating of the coating material of the nozzle applicator 5.
  • This drying device can e.g. Have infrared drying elements 48.
  • Another deflection roller 46 then guides the web past the additional drying device.
  • a press roller 2 Above the counter roller 1 there is a press roller 2, to which a similar application unit 7 as the second application unit 6 of the (lower) counter roller 1 is assigned.
  • a doctor blade 18 with an elastic holder is provided, which is carried by a doctor bar 17 and forms a sump 19 of application mass on the outer surface of the press roll 2.
  • a roller mill bearing 43 is provided, which enables an adjustment of either the bearing 44 of the press roller 2 or an adjustment of the counter roller 1 in the vertical direction by approximately 1 to 2 cm.
  • the two rollers 1 and 2 when the nozzle applicator 5 is taken out of operation, so that they form a press nip between them. It is then transferred from the sump 16 and 19 of the two applicators 6 and 7 provided on the lateral surfaces of the two rollers to the web. In this case, the web runs according to the double-dashed line, so does not pass through the basement, but is guided by further deflecting rollers 59 and 60 so that it can run directly into the press nip formed by the two rollers.
  • the doctor blades 15 and 18 have fine circumferential grooves for the purpose of precise and uniform metering.
  • the applied solids are up to about 16% for sizing and possibly up to 50% for pigmentation up to 35%.
  • the corresponding area-related application weights are then 2 to 4 gr / m2 or 4 to 7 gr / m2.
  • a deflecting roller 32 provided for the other operating case is also pivoted out of the area of the operator platform, for which purpose it is mounted on a pivoting device 33 which carries the deflecting roller 32 on an arm 34.
  • the point of application of the doctor blade 15 of the applicator 6 of the counter-roller 1 is approximately - viewed in the horizontal direction - in the middle of this roller.
  • the position of the elastic holder of the doctor blade 15 changes only slightly in the state when it is pressed against the jacket of the roller.
  • This application therefore does not need to be adjustable in the vertical direction. Of course, this simplifies the entire arrangement even further.
  • a frame 50 placed on the foundation 54 for holding the nozzle chamber applicator 5 must be provided in order to enable the angular position thereof to be adjusted with respect to the counter-roller 1 and to be pivoted away therefrom. Adjustment devices 51 and 52 are provided for this purpose.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Control Of Eletrric Generators (AREA)
  • Vehicle Body Suspensions (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

It is provided for a coating station for coating moving webs of material, such as in particular paper or cardboard, has two pressing rollers (1 and 2), one of which, namely the lower roller (1), also serves as counter-roller for the case in which the web of material is being coated by means of a nozzle application unit for coating material with a relatively high application weight of more than 5 g/m<2>. For this purpose, the mutual spacing of the two rollers can be adjusted permanently in the vertical direction. An appropriate guidance of the web partially by means of deflection rollers arranged beneath the operator plane (that is to say in the base), is such that on one side coating is achieved with coating material and on the other side of the web of material a light application of adhesive takes place for reasons of correction of the flat position and in order, on the other hand, to achieve coating (application of adhesive) in a pressing gap between the two rollers. For this purpose, the upper and lower roller - the lower roller additionally - have an application mechanism (6 and 7, respectively) provided with an elastic holder which bears a roller doctor with circumferential grooves and having a sump of application material, specifically on different sides of the two rollers (1, 2).

Description

Die Erfindung betrifft eine Einrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Einrichtung ist bekannt aus der DE-A-34 17 487. Im Falle der dort in Figur 1 dargestellten Anordnung sind zwei Preßwalzen, die sich horizontal einander gegenüberstehen, dazu vorgesehen, in dem zwischen ihnen gebildeten Preßspalt die auf ihre Mantelfläche aufgetragene Beschichtungsmasse auf die Warenbahn zu übertragen. Als Auftragswerk dient hier jeweils eine Vorrichtung, die einen elastischen Rakelhalter trägt, wobei als Rakelelement eine mit Umfangsrillen versehene Rollrakel verwendet wird. Es ist mit dieser Einrichtung möglich, sehr geringe Auftragsmengen mit Auftragsmassen von sehr geringem Feststoffgehalt aufzutragen. Die Auftragsmengen können pro Seite der Warenbahn 2 bis 3 g/m² betragen. In Figur 3 dieser Schrift ist eine Anordnung mit nur einer Walze beschrieben, bei der einerseits ein Auftragswerk der Mantelfläche der Walze zugeordnet ist und andererseits im Bereich der Mantelfläche sich ein zweites, mit einer Düsenkammer versehenes Auftragswerk zum Auftragen von Beschichtungsmasse direkt auf die eine Seite der Warenbahn befindet, wobei die andere Seite der Warenbahn von der Mantelfläche der Walze her beschichtet wird. Bei der in Figur 1 dieser Schrift dargestellten Anordnung sind die Auftragswerke jeweils im oberen, äußeren (d.h. auf der von der jeweils anderen Seite weggewandten Seite jeder Walze) Quadranten vorgesehen und gleich ausgebildet.The invention relates to a device according to the preamble of claim 1. Such a device is known from DE-A-34 17 487. In the case of the arrangement shown there in Figure 1, two press rolls, which are horizontally opposed to each other, are provided in to transfer the coating mass applied between them to the surface of the material. A device carrying an elastic doctor blade holder is used here as the application unit, a roller doctor blade provided with circumferential grooves being used as the doctor element. With this device it is possible to apply very small application quantities with application masses of very low solids content. The order quantities can be 2 to 3 g / m² per side of the web. In Figure 3 of this document, an arrangement is described with only one roller, in which on the one hand an applicator is assigned to the outer surface of the roller and on the other hand in the area of the outer surface there is a second applicator unit provided with a nozzle chamber for applying coating compound directly to one side of the Web is located, the other side of the web being coated from the outer surface of the roller. In the arrangement shown in FIG. 1 of this document, the applicator units are each provided in the upper, outer quadrant (ie on the side of each roller facing away from the other side) and are of identical design.

Die Aufgabe der Erfindung ist es demgegenüber, eine Einrichtung anzugeben, bei der beide Auftragsmöglichkeiten, also mit Rakelauftragswerk mit Sumpf einerseits und Auftragswerk mit Düsenkammer andererseits, mit wenig Aufwand vorgesehen ist.In contrast, the object of the invention is to provide a device in which both application options, that is to say with a doctor blade applicator with sump on the one hand and applicator with a nozzle chamber on the other, are provided with little effort.

Diese Aufgabe wird erfindungsgemäß bei einer Einrichtung der eingangs angegebenen Art durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst. Es werden die beiden Walzen, die nach Bedarf zwischen sich einen Preßspalt bilden können, übereinander, statt horizontal nebeneinander angeordnet. Man gewinnt dadurch Raum, um die nötigen drei Auftragswerke im Bereich der beiden Walzen so montieren zu können, daß zu jedem Auftragswerk eine Zutrittsmöglichkeit für den Bediener ohne weiteres in der üblichen Arbeitshaltung möglich ist.This object is achieved according to the invention in a device of the type specified at the outset by the features of the characterizing part of patent claim 1. The two rollers, which can form a press nip between them as required, are arranged one above the other instead of horizontally next to one another. This gives space to be able to mount the necessary three applicator units in the area of the two rollers in such a way that the operator can easily access each application unit in the usual working posture.

Durch eine bestimmte Bahnführung ist außerdem erreichbar, daß höchstens ein nur kleiner Umschlingungswinkel der Walzen erforderlich wird. Ein großer Umschlingungswinkel könnte dann von großem Nachteil sein, wenn saugfähiges Papier verwendet wird. Bei den kleinen, vorgesehenen Auftragsmengen (Trockensubstanz) besteht bei großen Umschlingungswinkeln die Gefahr, daß die Bahn in zu trockenem Zustand von einer der Walzen abläuft. Dazu ist weiter ein schwenkbares Traggestell für eine oberhalb der oberen Walze angeordnete Umlenkrolle vorgesehen. Weitere Umlenkrollen führen die Bahn in den Keller unterhalb der Bedienerebene der unteren Walze für den Fall, daß die Bahn den Preßspalt zwischen den beiden Walzen nicht durchlaufen muß. Dieser Fall gilt für die Beschichtungsvariante, wenn das Düsenauftragswerk der unteren Walze zum Einsatz kommt. In diesem Fall werden Streichmassen aufgetragen - im allgemeinen mit einem Strichgewicht von mehr als 7 g/m². Man hat dadurch auch die Möglichkeit, oberhalb der Anordnung zum Beschichten eine zusätzliche Trockeneinrichtung, z.B. einen Infrarot-Trockner, für die mit der Streichmasse beschichtete Seite der Warenbahn vorzusehen.A certain web guide can also achieve that at most only a small wrap angle of the rollers is required. A large wrap angle could be a major disadvantage if absorbent paper is used. With the small, planned application quantities (dry substance), there is a risk with large wrap angles that the web will run off one of the rollers when it is too dry. For this purpose, a pivotable support frame is also provided for a deflection roller arranged above the upper roller. Further deflection rollers guide the web into the basement below the operator level of the lower roller in the event that the web does not have to pass through the press nip between the two rollers. This applies to the coating variant when the nozzle roller of the lower roller is used. In this case, coating slips are applied - generally with a coat weight of more than 7 g / m². This also gives the possibility of providing an additional drying device, for example an infrared dryer, for the side of the web coated with the coating slip, above the arrangement for coating.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert, wobei die Einrichtung im Querschnitt prinzipmäßig mit zwei verschiedenen Bahnführungsweisen dargestellt ist.The invention is explained below using an exemplary embodiment shown in the drawing, the device being shown in cross section in principle with two different web routing methods.

Es ist eine untere Gegenwalze für die strichpunktiert dargestellte Warenbahn 1 vorgesehen, der zwei Auftragswerke 5 und 6 zugeordnet sind. Davon weist das rechte Auftragswerk eine sogenannte Düsenkammer 10, die im allgemeinen mit dem Rakelbalken 8 vereinigt ausgebildet ist, und die die Auftragsmasse vorzugsweise unter überatmosphärischem Druck der Warenbahn direkt zuführt. Als Rakelelement dient im allgemeinen eine Strichklinge, und überschüssige Streichmasse fließt im allgemeinen entgegen der Laufrichtung der Warenbahn in eine Auffangwanne über einen an der Gegenwalze 1 gebildeten Überlaufspalt ab. Damit können beliebige Auftragsmengen oberhalb 4 bis 5 g/m² bis etwa 15 g/m² je Seite der vorzugsweise aus Papier oder Karton gebildeten Warenbahn aufgetragen werden. Dieses Auftragswerk befindet sich also auf der Seite der Gegenwalze 1, auf der die Warenbahn der Streichstation vorzugsweise von der Papiermaschine her zugeführt wird. In diesem Fall, wenn dieses Auftragswerk benutzt wird, wird die Warenbahn über Umlenkrollen 25 bis 28 teilweise unterhalb des die Bedienerebene A bildenden Fundaments 54 - also im Keller - geführt, so daß sie also dem Düsenauftragswerk von der anderen Seite her zuläuft. Auf dieser (anderen) Seite befindet sich nun ein Auftragswerk 6 mit einem von einem elastischen Halter getragenen, mit Umfangsrillen versehenen Rollrakelstab 15. Der elastische Halter samt Rollrakelstab 15 sowie der Tragbalken für diese beiden Elemente bilden an der Mantelfläche der Gegenwalze 1 einen Sumpf aus fließfähiger Auftragsmasse, von einer Konsistenz von höchstens 8 %, wie z.B. Leim. Damit wird die Rückseite der Bahn beschichtet - d.h. mehr oder weniger imprägniert, z.B. für die sogenannte Flachlagekorrektur - wenn auf der anderen Seite (Vorderseite) der Warenbahn die Streichmasse von der Düsenauftragseinrichtung 5 aufgetragen wird.A lower counter roller is provided for the web 1 shown in broken lines, to which two applicator units 5 and 6 are assigned. Of these, the right application unit has a so-called nozzle chamber 10, which is generally combined with the doctor bar 8 and which feeds the application mass directly under superatmospheric pressure to the web. A doctor blade is generally used as the doctor element, and excess coating slip generally flows into a collecting trough, counter to the direction of travel of the material web, via an overflow gap formed on the counter roller 1. This means that any application quantities above 4 to 5 g / m² to approximately 15 g / m² can be applied to each side of the web, preferably made of paper or cardboard. This application unit is therefore on the side of the counter roller 1, on which the material web of the coating station is preferably fed from the paper machine. In this case, if this application unit is used, the material web is guided over deflection rollers 25 to 28 partially below the foundation 54 forming operator level A - that is, in the basement - so that it thus runs towards the nozzle application unit from the other side. On this (other) side there is now an applicator unit 6 with a doctor blade rod 15 carried by an elastic holder and provided with circumferential grooves. The elastic holder together with the doctor blade rod 15 and the support beam for these two elements form a sump of flowable on the outer surface of the counter roller 1 Application mass, of a consistency of at most 8%, such as glue. The back of the web is thus coated - ie more or less impregnated, for example for the so-called flat position correction - when the coating slip is applied by the nozzle application device 5 on the other side (front) of the web.

Durch die dann vorhandene Bahnführung entsprechend der strichpunktierten Linie kann oberhalb der Streichstation eine zusätzliche Trockeneinrichtung 45 für die Seite der Warenbahn vorgesehen werden, die den erheblich dickeren Strichauftrag der Streichmasse des Düsenauftragswerks 5 aufweist. Diese Trockeneinrichtung kann z.B. Infrarot-Trockenelemente 48 aufweisen. Eine weitere Umlenkrolle 46 leitet die Bahn dann an der zusätzlichen Trockeneinrichtung vorbei.The then existing web guidance corresponding to the dash-dotted line allows an additional drying device 45 to be provided for the side of the material web above the coating station, which has the considerably thicker coating of the coating material of the nozzle applicator 5. This drying device can e.g. Have infrared drying elements 48. Another deflection roller 46 then guides the web past the additional drying device.

Oberhalb der Gegenwalze 1 befindet sich eine Preßwalze 2, der ein ähnliches Auftragswerk 7 wie das zweite Auftragswerk 6 der (unteren) Gegenwalze 1 zugeordnet ist. Auch hier ist eine Rollrakel 18 mit elastischem Halter vorgesehen, die von einem Rakelbalken 17 getragen werden und einen Sumpf 19 aus Auftragsmasse an der Mantelfläche der Preßwalze 2 bilden. Dabei ist eine Walzenstuhllagerung 43 vorgesehen, die eine Verstellung entweder des Lagers 44 der Preßwalze 2 oder eine Verstellung der Gegenwalze 1 in vertikaler Richtung um etwa 1 bis 2 cm ermöglicht.Above the counter roller 1 there is a press roller 2, to which a similar application unit 7 as the second application unit 6 of the (lower) counter roller 1 is assigned. Here, too, a doctor blade 18 with an elastic holder is provided, which is carried by a doctor bar 17 and forms a sump 19 of application mass on the outer surface of the press roll 2. In this case, a roller mill bearing 43 is provided, which enables an adjustment of either the bearing 44 of the press roller 2 or an adjustment of the counter roller 1 in the vertical direction by approximately 1 to 2 cm.

Es ist also möglich, bei Außerbetriebnahme des Düsenauftragswerkes 5 die beiden Walzen 1 und 2 sich zu nähern, so daß sie zwischen sich einen Preßspalt bilden. Es wird dann die aus dem Sumpf 16 bzw. 19 der beiden an den Mantelflächen der beiden Walzen vorgesehenen Auftragswerke 6 bzw. 7 auf die Warenbahn übertragen. In diesem Fall verläuft die Warenbahn entsprechend der doppelpunktstrichlierten Linie, durchläuft also nicht den Keller, sondern wird von weiteren Umlenkrollen 59 und 60 so geführt, daß sie direkt in den von den beiden Walzen gebildeten Preßspalt einlaufen kann. Die Rollrakeln 15 und 18 weisen zu dem Zweck der genauen und gleichmäßigen Dosierung feine Umfangsrillen auf.It is therefore possible to approach the two rollers 1 and 2 when the nozzle applicator 5 is taken out of operation, so that they form a press nip between them. It is then transferred from the sump 16 and 19 of the two applicators 6 and 7 provided on the lateral surfaces of the two rollers to the web. In this case, the web runs according to the double-dashed line, so does not pass through the basement, but is guided by further deflecting rollers 59 and 60 so that it can run directly into the press nip formed by the two rollers. The doctor blades 15 and 18 have fine circumferential grooves for the purpose of precise and uniform metering.

Die Auftragsfeststoffgehalte betragen bei Leimung bis etwa 16 % und bei Pigmentierung bis 35 % evtl. 50 %. Die entsprechenden flächenbezogenen Auftragsgewichte betragen dann 2 bis 4 gr/m² bzw. 4 bis 7 gr/m².The applied solids are up to about 16% for sizing and possibly up to 50% for pigmentation up to 35%. The corresponding area-related application weights are then 2 to 4 gr / m² or 4 to 7 gr / m².

Da in diesem Fall auch das obere, d.h. das der Preßwalze 2 zugeordnete Auftragswerk 7 in Betrieb ist, ist auch eine Bedienerbühne vorhanden, d.h. es ist zumindest ein Bedienerboden 36 in der ausgezogen dargestellten Lage eingeschwenkt, so daß der Bedienungsmann dort seine Arbeit verrichten kann. Bei diesem Betriebsfall ist weiterhin eine für den anderen Betriebsfall vorgesehene Umlenkrolle 32 aus dem Bereich der Bedienerbühne herausgeschwenkt, wozu sie an einer Schwenkvorrichtung 33 gelagert ist, die an einem Arm 34 die Umlenkrolle 32 trägt.In this case, since the upper, i.e. the applicator 7 assigned to the press roll 2 is in operation, there is also an operator platform, i.e. at least one operator base 36 is pivoted in the position shown in solid lines, so that the operator can do his work there. In this operating case, a deflecting roller 32 provided for the other operating case is also pivoted out of the area of the operator platform, for which purpose it is mounted on a pivoting device 33 which carries the deflecting roller 32 on an arm 34.

Wie man aus der Figur erkennt, ist der Angriffspunkt der Rollrakel 15 des Auftragswerks 6 der Gegenwalze 1 etwa - in Horizontalrichtung betrachtet - in der Mitte dieser Walze. Dadurch ändert sich bei Verschiebung der Walze in vertikaler Richtung um 1 oder 2 cm die Lage des elastischen Halters der Rollrakel 15 in dem Zustand, wenn sie an den Mantel der Walze angepreßt ist, nur wenig. Man kann durch ein leichtes Verschwenken der Halteeinrichtung des elastischen Halters die dann auftretende Abstandsänderung der Rollrakel zur Mantelfläche der Gegenwalze 1 ohne weiteres ausgleichen. Dieses Auftragswerk braucht also dann nicht in vertikaler Richtung verstellbar ausgebildet zu sein. Dies vereinfacht die gesamte Anordnung natürlich noch weiter.As can be seen from the figure, the point of application of the doctor blade 15 of the applicator 6 of the counter-roller 1 is approximately - viewed in the horizontal direction - in the middle of this roller. As a result, when the roller is displaced in the vertical direction by 1 or 2 cm, the position of the elastic holder of the doctor blade 15 changes only slightly in the state when it is pressed against the jacket of the roller. You can easily compensate for the change in distance of the doctor blade to the lateral surface of the counter-roller 1 by slightly pivoting the holding device of the elastic holder. This application therefore does not need to be adjustable in the vertical direction. Of course, this simplifies the entire arrangement even further.

Für die Streicheinrichtung muß ein auf dem Fundament 54 aufgesetztes Gestell 50 zur Halterung des Düsenkammer-Auftragswerks 5 vorgesehen sein, um die Verstellung dessen Winkellage in Bezug auf die Gegenwalze 1 und ein Abschwenken desselben von dieser zu ermöglichen. Dazu sind Verstelleinrichtungen 51 und 52 vorgesehen.For the coating device, a frame 50 placed on the foundation 54 for holding the nozzle chamber applicator 5 must be provided in order to enable the angular position thereof to be adjusted with respect to the counter-roller 1 and to be pivoted away therefrom. Adjustment devices 51 and 52 are provided for this purpose.

Claims (4)

  1. Device for applying at least one coating onto a moving web, especially of paper or cardboard, the device having the following features:
    a) two rolls (1, 2) are provided one above another,
    b) on the first side of the lower roll (1) a nozzle applicator device (5) for applying a coating mass of more than 5 g/m² directly onto the one side of the web is provided, and
    b1) on the other side of the lower roll (1) there is a wiper element (15) having an elastic wiper holder, adjoining them a basin (16) of a second coating mass for application of same onto the roll face, which mass is then applied onto the second side of the web,
    c) on the same side of the upper roll (2) as the first side of the lower roll (1) provided with the nozzle applicator device (5), there is a further wiper element (18) and its elastic wiper holder (18), adjoining which a second basin (19) of flowable coating mass for application of same onto the roll face can be formed, the web then being guided through the pressing gap then formed between the two rolls (1, 2) and the coating mass being transferred onto each side of the web in a second web guidance mode,
    d) a mounting that can be lowered is provided for one of the two rolls for making and adjusting the pressing gap between the two rolls (1, 2), and
    e) for the purpose of making possible both web guidance modes, at least a part (36) of the operator platform for the applicator device (18, 19) of the upper roll (2) can be pivoted away, as also can an upwardly situated guide roll (32) mounted on pivot arms (34), this upper guide roll (32) serving for guiding the web out of the region of the upper roll (2) and above it.
  2. Device according to Claim 1, characterized by web guide rolls (27, 28, 29) in the basement - that is underneath the operator level (A) of the applicator devices (5, 6) of the counter-roll (1) - for guiding the web to the counter-roll (1) and to the nozzle applicator device (5) of same from below (basement) on the side of the counter-roll (1) which possesses the applicator device (6) having the basin (16).
  3. Device according to one of Claims 1 to 2, characterized in that the wiper element of the applicator devices (5, 6, 7) is a roller wiper having circumferential grooves for a low application weight per unit area with consistencies of the application mass of at most 50%.
  4. Device according to one of Claims 1 to 3, characterized in that the first side of the counter-roll (1) is that side at which the web is conducted away out of the papermaking machine.
EP91104505A 1990-05-08 1991-03-22 Device for applying a liquid coating product on sheet-like materials Expired - Lifetime EP0458035B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4014647A DE4014647C2 (en) 1990-05-08 1990-05-08 Device for applying a coating to a running web
DE4014647 1990-05-08

Publications (3)

Publication Number Publication Date
EP0458035A2 EP0458035A2 (en) 1991-11-27
EP0458035A3 EP0458035A3 (en) 1993-02-03
EP0458035B1 true EP0458035B1 (en) 1994-09-07

Family

ID=6405902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104505A Expired - Lifetime EP0458035B1 (en) 1990-05-08 1991-03-22 Device for applying a liquid coating product on sheet-like materials

Country Status (10)

Country Link
US (1) US5203920A (en)
EP (1) EP0458035B1 (en)
JP (1) JP3089564B2 (en)
AT (1) ATE111172T1 (en)
BR (1) BR9101886A (en)
CA (1) CA2041845A1 (en)
DE (1) DE4014647C2 (en)
ES (1) ES2058964T3 (en)
FI (1) FI106185B (en)
NO (1) NO911760L (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211401A1 (en) * 1992-04-04 1993-10-07 Voith Gmbh J M Coating device for webs of paper or cardboard
DE4218596C2 (en) * 1992-06-05 1996-05-02 Voith Gmbh J M Coating device for indirect application of coating color on a paper or cardboard web
US6077352A (en) * 1992-09-02 2000-06-20 Consolidated Papers, Inc. Mounting assembly for a single backing roll coating station
DE4341566B4 (en) * 1993-12-07 2005-03-10 Heidelberger Druckmasch Ag Release agent layers for surface protection of freshly printed sheets and apparatus for coating the freshly printed sheets with the release agent layer
BR9307832A (en) * 1993-12-11 1995-12-05 Voith Gmbh J M A mounting kit for a single counter roll paper painting station
DE4414921C2 (en) * 1994-04-28 1998-03-19 Voith Gmbh J M Method and device for applying at least one liquid medium to a running material web, in particular made of paper or cardboard
US5573593A (en) * 1995-01-17 1996-11-12 Beloit Technologies, Inc. Coating apparatus for selectively coating either or both sides of a traveling paper web
DE19511050A1 (en) * 1995-03-25 1996-09-26 Voith Sulzer Papiermasch Gmbh Method and device for producing a paper web having a CF layer
JPH0975814A (en) * 1995-09-19 1997-03-25 Fuji Photo Film Co Ltd Coating device
US6113986A (en) * 1996-02-01 2000-09-05 Fort James Company Coated base products, apparatus and process for producing same
DE19743246A1 (en) * 1997-09-30 1999-04-01 Voith Sulzer Papiertech Patent Web coating assembly enabling direct and indirect coating e.g. of paper web
DE10212818A1 (en) * 2002-03-22 2003-10-02 Voith Paper Patent Gmbh applicator
DE102004037532A1 (en) * 2004-08-03 2006-03-16 Voith Paper Patent Gmbh applicator
DE102008000160A1 (en) * 2008-01-28 2009-07-30 Voith Patent Gmbh Device for improving the working conditions of the operators of a coating device

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US1695319A (en) * 1926-02-10 1928-12-18 John Waldron Corp Coating machine
US1809146A (en) * 1928-08-11 1931-06-09 Beveridge Paper Company Process of decorating paper
US2970564A (en) * 1955-12-23 1961-02-07 Champion Paper & Fibre Co Apparatus for coating paper
US4029833A (en) * 1975-04-11 1977-06-14 Midland-Ross Corporation Web coating apparatus
US4147126A (en) * 1976-01-15 1979-04-03 Imperial Chemical Industries Limited Coating apparatus
US4354449A (en) * 1978-07-03 1982-10-19 The Black Clawson Company Two sided coater
US4325784A (en) * 1980-03-20 1982-04-20 Beloit Corporation Combined size press and breaker stack and method
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JPS59106007A (en) * 1982-12-10 1984-06-19 Toyota Central Res & Dev Lab Inc Locus control system of multijoint robot
DE3417487A1 (en) * 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim DEVICE FOR APPLYING A LIQUID ON A RUNNING TRAIN
DE3440634C2 (en) * 1984-11-07 1986-09-11 J.M. Voith Gmbh, 7920 Heidenheim Device for double-sided coating of moving webs
EP0352465A3 (en) * 1988-07-27 1990-10-10 J.M. Voith GmbH Application device for coating moving webs, and coating process
DE3836919A1 (en) * 1988-10-29 1990-05-03 Voith Gmbh J M Coating device, in particular size press

Also Published As

Publication number Publication date
ES2058964T3 (en) 1994-11-01
DE4014647A1 (en) 1991-11-14
JPH0584457A (en) 1993-04-06
NO911760L (en) 1991-11-11
NO911760D0 (en) 1991-05-06
EP0458035A2 (en) 1991-11-27
US5203920A (en) 1993-04-20
BR9101886A (en) 1991-12-17
JP3089564B2 (en) 2000-09-18
FI106185B (en) 2000-12-15
DE4014647C2 (en) 1995-03-30
ATE111172T1 (en) 1994-09-15
EP0458035A3 (en) 1993-02-03
FI912079A0 (en) 1991-04-29
FI912079A (en) 1991-11-09
CA2041845A1 (en) 1991-11-09

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