EP1607141A1 - Coating device - Google Patents

Coating device Download PDF

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Publication number
EP1607141A1
EP1607141A1 EP05103657A EP05103657A EP1607141A1 EP 1607141 A1 EP1607141 A1 EP 1607141A1 EP 05103657 A EP05103657 A EP 05103657A EP 05103657 A EP05103657 A EP 05103657A EP 1607141 A1 EP1607141 A1 EP 1607141A1
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EP
European Patent Office
Prior art keywords
wear body
application
sealing plate
running
substrate
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
EP05103657A
Other languages
German (de)
French (fr)
Other versions
EP1607141B1 (en
Inventor
Christoph Henninger
Horst Kaipf
Martin Schaubmaier
Michael Heitzinger
Rüdiger Keinberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
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Publication date
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Publication of EP1607141A1 publication Critical patent/EP1607141A1/en
Application granted granted Critical
Publication of EP1607141B1 publication Critical patent/EP1607141B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00Apparatus 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
    • B05C1/04Apparatus 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
    • B05C1/08Apparatus 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
    • B05C1/0817Apparatus 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 characterised by means for removing partially liquid or other fluent material from the roller, e.g. scrapers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H23/00Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22Addition to the formed paper
    • D21H23/32Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34Knife or blade type coaters

Definitions

  • the invention relates to a device for applying a liquid or pasty Medium on a running surface, whereby the underground with direct order the surface of a paper, board or other fibrous web and indirect Order is the surface of a transfer element which indicates the application medium emits the fibrous web.
  • the device comprises an application chamber, the based on the running direction of the current underground at least on the downstream side of an element, for example a doctor element and inlet side of a another element, such as a Stauolin or another doctor element is limited and the application chamber at its side edge one Contains limiting element for adjusting the application width, wherein the Limiting element is equipped with a flexible sealing plate, which is the space between the current underground and the drain and run-in elements essentially seals.
  • SDTA Short Dwell Time Applicator
  • So application device with a short exposure time of the application medium in the Termed technical language.
  • the application medium is coating color, glue, starch, an impregnating agent or used in a coating chamber and immediately after it is brought to the desired coating weight.
  • the present invention is therefore based on the object, a generic Further develop application device, with the disadvantages of the prior Technology are avoidable.
  • the object of the invention is achieved by a device according to the features of Mark of claim 1 solved.
  • the sealing plate already known from the prior art is according to the invention designed so that they have a current background and the expiration and inlet-side doctor elements or the ram rail directed, patch Wear body has.
  • the surfaces of the current substrate and also those of the squeegee elements, in particular the discharge element arranged doctoring element, which a Dosing and / or equalization of delivered by a contract chamber Realized on the running underground layer are thus spared and thereby significantly increase the service life of these components.
  • the invention can therefore be particularly useful for so-called, from Associated companies of the Applicant "Speedsizer” or Apply “Speedcoater”.
  • These coaters coat a fibrous web, as just described, by indirect means, by two such applicator rolls together form a gap through which the fibrous web runs.
  • the Fibrous web should have on both sides a line-free edge. This scratch-free edge is in terms of thus avoidable Abspritzungen of Order medium desired in the environment and can be used with Limiting elements that move accordingly across the current path let reach.
  • the boundary elements remain during the running Operation in the once set position.
  • the format or the desired job width on the Width of the web determines why the boundary elements in their position as well are changeable. This allows an adaptation to the respective width of the web guarantee.
  • the invention on a limiting element more precisely on the Abdichtplatte a limiting element patch wear body has a only low friction.
  • the deposit or deposit of abrasive particles is prevented, which also ensures a consistent and high quality Application layer is achieved.
  • An expedient embodiment of the wear body according to the invention can therein exist that this with respect to the rest of the flexible material of the sealing plate wear, shape and also heat resistant, whereby the entire Limiting element has a longer life than previously achieved.
  • the wear body with the rest Material of the sealing plate by gluing, welding, screwing, riveting, press in or pour in to join.
  • the wear body is at some of these Types of connection then also interchangeable and thereby increases the service life of the Limiting element continues.
  • the sealing plate is rubber, foam rubber, polyurethane or the like
  • a material for the wear body in Thermoplastics such as polyethylene, polyester, or polymers, such as Polyurethane, ceramics or material mixtures, such as rubber with graphite or else so-called bearing metals, such as bronze, are usable.
  • the materials for the Wear particles are characterized by dimensional stability, heat resistance and above all a low coefficient of friction.
  • the wear body according to the invention can have a different design Have surface. Accordingly, the current underground or Application roller facing surface of the wear body even or spherical be educated. But it can also have a sloping roof shape or the Surface can be provided with groove-shaped incisions.
  • the surface of the wear body with a for drain side and or inlet side arranged element such as the Stauré or a further squeegee element directed towards beveled or rounded edge be provided.
  • FIG. 1 shows a known application device 1 from the prior art.
  • This device 1 is assigned to a running in the direction L substrate 2.
  • the substrate 2 is the fibrous web itself and at indirect order, for example, an applicator roll, which at one here not shown portion of the roller that issued by the applicator 1 Application medium M on a also not visible here up to 10m and more wide Fiber web of paper or cardboard transfers.
  • the device 1 is a so-called application device with short residence time, because that on the running underground in an order chamber 3 applied application medium M immediately scraped off, i. to the desired Line weight brought or even immediately equalized, i. E. is equalized.
  • the device 1 consists of a matched to the width of the fibrous web Support beam 4 and a terminal block 5, which between them a blade-like baseboard 6 clamp, which in turn carries a doctor bed 7 for receiving a rotatable, circular cylindrical metering rod as doctor element.
  • element 8 be designated.
  • the element 8 is at the outlet end of the application chamber. 3 arranged. This is the end where the current underground 2 of the Order chamber runs away or runs away.
  • the opposite end is the Application chamber, the inlet-side and inlet-side end of the application chamber 3, So where the ground 2 of the application chamber 3 tapers.
  • This Chamber 3 is accordingly arranged at the inlet end a further element 9.
  • a Stauring is provided. Instead of the drawn Staumann could as element 9 but also such a squeegee element as the under Number 8 designated with doctor bed 7 and 6 skirting, find use.
  • the application chamber 3 is limited in its length (this corresponds to a width section of the device 1 or the current substrate 2) of lateral boundary elements 10, which are also referred to as a format delimiter because they determine the application width B of the applied with the application medium M line or allow a corresponding remaining edge free edge ..
  • lateral boundary elements 10 which are also referred to as a format delimiter because they determine the application width B of the applied with the application medium M line or allow a corresponding remaining edge free edge ..
  • An adaptation to the existing width of the fibrous web is possible.
  • Each limiting element 10 is provided with a flexible sealing plate 11.
  • the flexible sealing plate consists of a one-piece molded sealing material, such as rubber, Foam rubber or polyurethane.
  • the sealing plate can touch the sealing plate with the tight neighboring components, such as the current underground 2 and the Doctor blade parts 7, 8 and the existing on the inlet side bar 9 (which can also be omitted and for another squeegee element for Limitation of the application chamber 3 may be present) avoid avoiding these components mentioned due to the high friction damage are.
  • the underground 2 is affected.
  • the substrate is designed as an applicator roll, is above all the Roll surface (the reference of the applicator roll) at risk.
  • FIG. 2 Such a device 1a according to the invention is shown in perspective in FIG. 2 , in which the sealing plate 11 has been upgraded with said wear body 15. It otherwise has the same components as the known from Figure 1 device of the prior art, which is why a repetition of the structure is omitted here.
  • FIGS. 2 and 3 each show a flat surface 17 with a rounded edge 18 facing the substrate. The edge 18 can thereby contact the outer surface of the rotating metering rod 8 safely.
  • a formed below the surface 17 tab 20 of the wear body is used the attachment to the sealing plate 11 and / or the limiting element 10. Die Connection can be completed with a slide into the tab 20 Bolt 21.
  • FIG. 3 shows a single tab 20.
  • FIGS. 5 and 6 approximately correspond to the embodiment of FIG. 4 but show different surface shapes.
  • FIG. 5 shows a surface 17 with an oblique roof shape
  • FIG. 6 shows a surface provided with groove-like incisions 22.
  • the wear body 15 can with the rest of the material of the sealing plate 11th glued, welded, bolted, riveted, pressed or cast become. The wear body 15 is then also in some of these types of connections replaceable and thereby increases the service life of the limiting element as Whole thing.
  • a material for the limiting element 10 and the sealing plate 11 is rubber, Sponge rubber, polyurethane or the like provided, whereas as a material for the wear body 15 more wear-resistant materials, such as thermoplastics For example, polyethylene, polyester, or ceramic or material mixtures, such as rubber with graphite or so-called bearing metals, such as bronze usable are.
  • the materials for the wear body 15 are characterized by dimensional stability, Heat resistance and especially a low coefficient of friction than the Materials that were previously only for the sealing plates 11 or the Limiting elements 10 were used off.
  • an SDTA device is applicable, but also to the known flexible format slider, the length of the dosing of Limit free jet application nozzles, can be placed.

Abstract

The strip of paste material may be an adhesive. The paper or cardboard may be in contact with a large roller and the paste material is supplied through a slit immediately before a small diameter spreading roller (8) held in a bearing piece (7). (7) Has a thin extension flange (6) engaging mountings and holding a strip width limiting fitting (10) and a sealing body (15) with a sealing plate (11).

Description

Die Erfindung betrifft eine Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf einen laufenden Untergrund, wobei der Untergrund bei direktem Auftrag die Oberfläche einer Papier-, Karton- oder andere Faserstoffbahn und bei indirektem Auftrag die Oberfläche eines Übertragselementes ist, welche das Auftragsmedium an die Faserstoffbahn abgibt. Die Vorrichtung umfasst eine Auftragskammer, die bezogen auf die Laufrichtung des laufenden Untergrundes zumindest ablaufseitig von einem Element, beispielsweise einem Rakelelement und einlaufseitig von einem weiteren Element, beispielsweise einer Stauleiste oder einem weiteren Rakelelement begrenzt ist und die Auftragskammer an ihrem Seitenrand jeweils ein Begrenzungselement zur Einstellung der Auftragsbreite aufweist, wobei das Begrenzungselement mit einer flexiblen Abdichtplatte bestückt ist, die den Raum zwischen dem laufenden Untergrund und den ablauf- und einlaufseitigen Elementen im Wesentlichen abdichtet.The invention relates to a device for applying a liquid or pasty Medium on a running surface, whereby the underground with direct order the surface of a paper, board or other fibrous web and indirect Order is the surface of a transfer element which indicates the application medium emits the fibrous web. The device comprises an application chamber, the based on the running direction of the current underground at least on the downstream side of an element, for example a doctor element and inlet side of a another element, such as a Stauleiste or another doctor element is limited and the application chamber at its side edge one Contains limiting element for adjusting the application width, wherein the Limiting element is equipped with a flexible sealing plate, which is the space between the current underground and the drain and run-in elements essentially seals.

Eine derartige Auftragsvorrichtung wird als SDTA, d.h. Short Dwell Time Applicator, also Auftragsvorrichtung mit kurzer Einwirkzeit des Auftragsmediums, in der Fachsprache bezeichnet.Such an applicator is referred to as SDTA, i. Short Dwell Time Applicator, So application device with a short exposure time of the application medium, in the Termed technical language.

Als Auftragsmedium wird Streichfarbe, Leim, Stärke, ein Imprägniermittel oder dergleichen verwendet, welches in einer Auftragskammer aufgetragen und unmittelbar danach auf das gewünschte Strichgewicht gebracht wird.The application medium is coating color, glue, starch, an impregnating agent or used in a coating chamber and immediately after it is brought to the desired coating weight.

Die aus dem Stand der Technik bekannten Begrenzungselemente, die auch als Randbegrenzer bzw. auch als Formatbegrenzer bezeichnet werden, und wie der Name schon aussagt, einen strichfreien Rand und ein bestimmtes Format oder Auftragsbreite auf der laufenden Faserstoffbahn während ihrer Herstellung und/oder Veredelung festlegen sollen, haben verschiedene Nachteile. Bei Berührung mit dem laufenden Untergrund wird dieser aufgrund der hohen Reibung partiell beschädigt. The known from the prior art limiting elements, which also as Margin delimiter or also known as a format delimiter, and how the Name already says, a borderless margin and a specific format or Application width on the running fibrous web during their production and / or To set the finishing process, there are several disadvantages. In contact with the running underground this is partially damaged due to the high friction.

Außerdem können aus dem Rohmaterial der Faserstoffbahn und aus dem Auftragsmedium sich herauslösende Partikel an der Abdichtplatte ablagern. Diese abrasiv wirkenden Partikel beschädigen dadurch den laufenden Untergrund, also die Faserstoffbahn selbst und die sie stützende Walze oder falls der laufende Untergrund eine Auftragswalze ist, auch deren Walzenbezug. Eine Beschädigung des zur Dosierung und/oder Vergleichmäßigung des aufgebrachten Auftragsmediums dienenden Rakelelementes ist ebenfalls zu verzeichnen. Insbesondere, wenn das Rakelelement ein in einem Rakelbett drehender kreiszylindrischer Rakelstab ist, führt das zu einem lokalen Trockenlauf, mit den negativen Folgen der Schädigung der Außenfläche des Rakelstabes und der damit zusammenhängenden Qualität der Auftragsschicht.In addition, from the raw material of the fibrous web and from the Application medium deposit releasing particles on the sealing plate. These abrasive particles thus damage the running surface, ie the Fibrous web itself and the supporting roller or if the running underground an applicator roll is, including their roll cover. Damage to the Dosing and / or homogenization of the applied application medium serving squeegee element is also recorded. Especially if that Doctor blade is a rotating in a doctor bed circular cylindrical metering rod leads that leads to a local dry run, with the negative consequences of damage to the Outside surface of the metering rod and the associated quality of the Application layer.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine gattungsgemäße Auftragsvorrichtung derart weiterzubilden, mit der die Nachteile des Standes der Technik vermeidbar sind.The present invention is therefore based on the object, a generic Further develop application device, with the disadvantages of the prior Technology are avoidable.

Die Aufgabe der Erfindung wird durch eine Vorrichtung gemäß den Merkmalen des Kennzeichens des Anspruches 1 gelöst.The object of the invention is achieved by a device according to the features of Mark of claim 1 solved.

Die aus dem Stand der Technik bereits bekannte Abdichtplatte ist erfindungsgemäß so ausgebildet, dass sie einen zum laufenden Untergrund und den ablauf- und einlaufseitigen Rakelelementen bzw. der Stauleiste gerichteten, aufgesetzten Verschleißkörper aufweist.The sealing plate already known from the prior art is according to the invention designed so that they have a current background and the expiration and inlet-side doctor elements or the ram rail directed, patch Wear body has.

Die Oberflächen des laufenden Untergrundes und auch die der Rakelelemente, insbesondere des ablaufseitig angeordneten Rakelelementes, welches eine Dosierung und/oder Vergleichmäßigung der von einer Auftragskammer abgegebenen auf den laufenden Untergrund aufgebrachten Schicht realisiert, werden somit geschont und erhöhen dadurch erheblich die Standzeiten dieser Bauteile.The surfaces of the current substrate and also those of the squeegee elements, in particular the discharge element arranged doctoring element, which a Dosing and / or equalization of delivered by a contract chamber Realized on the running underground layer are thus spared and thereby significantly increase the service life of these components.

Es soll an dieser Stelle nochmals erwähnt sein, dass der laufende Untergrund bei direktem Auftrag eine Papier-, Karton oder andere Faserstoffbahn ist, die teilweise eine sogenannte Stütz- oder Gegenwalze umschlingt. Bei indirektem Auftrag ist der laufende Untergrund ein Übertragselement, welches das auf dieses aufgebrachte Auftragsmedium danach an die Faserstoffbahn abgibt. Als Übertragselement dient zumeist eine Walze, d.h. eine Auftragswalze, deren Walzenbezug durch die erfindungsgemäßen Verschleißkörper an den Strichrandbegrenzungselementen besonders geschont wird.It should be mentioned again at this point that the current underground at Direct order a paper, cardboard or other fibrous web is partially a so-called support or counter-roller wraps around. For indirect order is the running background a carry element, which applied to this Application medium then emits to the fibrous web. Serves as a transfer element usually a roller, i. an applicator roll whose roll cover by the wear body according to the invention at the bar edge boundary elements especially spared.

Die Erfindung lässt sich daher besonders zweckmäßig für sogenannte, vom zugehörigen Unternehmen der Anmelderin vertriebenen "Speedsizer" oder "Speedcoater" anwenden. Diese Streichmaschinen beschichten eine Faserstoffbahn, wie eben beschrieben, auf indirektem Wege, indem zwei solche Auftragswalzen miteinander einen Spalt bilden, durch den die Faserstoffbahn läuft. Die Faserstoffbahn soll dabei beidseitig einen strichfreien Rand aufweisen. Dieser strichfreie Rand ist hinsichtlich der damit vermeidbaren Abspritzungen von Auftragsmedium in die Umgebung gewünscht und lässt sich mit eingestzten Begrenzungselementen, die sich entsprechend quer zur laufenden Bahn verschieben lassen, erreichen. Die Begrenzungselemente verbleiben während des laufenden Betriebes in der einmal eingestellten Position. Außerdem wird mit den Begrenzungselementen das Format bzw. die gewünschte Auftragsbreite über die Breite der Bahn bestimmt, weshalb die Begrenzungselemente in ihrer position auch veränderbar sind. Damit lässt sich eine Anpassung an die jeweilige Breite der Bahn gewährleisten.The invention can therefore be particularly useful for so-called, from Associated companies of the Applicant "Speedsizer" or Apply "Speedcoater". These coaters coat a fibrous web, as just described, by indirect means, by two such applicator rolls together form a gap through which the fibrous web runs. The Fibrous web should have on both sides a line-free edge. This scratch-free edge is in terms of thus avoidable Abspritzungen of Order medium desired in the environment and can be used with Limiting elements that move accordingly across the current path let reach. The boundary elements remain during the running Operation in the once set position. In addition, with the Delimiters the format or the desired job width on the Width of the web determines why the boundary elements in their position as well are changeable. This allows an adaptation to the respective width of the web guarantee.

Der erfindungsgemäße auf ein Begrenzungselement, genauer gesagt auf die Abdichtplatte eines Begrenzungselementes aufgesetzte Verschleißkörper weist eine nur geringe Reibung auf. Die Ein- bzw. Ablagerung von abrasiv wirkenden Partikeln wird verhindert, wodurch auch eine einheitliche und qualitativ hochwertige Auftragschicht erreicht wird.The invention on a limiting element, more precisely on the Abdichtplatte a limiting element patch wear body has a only low friction. The deposit or deposit of abrasive particles is prevented, which also ensures a consistent and high quality Application layer is achieved.

Eine zweckmäßige Ausbildung des erfindungsgemäßen Verschleißkörpers kann darin bestehen, dass dieser bezüglich des übrigen flexiblen Werkstoffes der Abdichtplatte verschleiß-, form- und auch hitzebeständiger ist, wodurch das gesamte Begrenzungselement eine höhere Standzeit als bisher erreicht.An expedient embodiment of the wear body according to the invention can therein exist that this with respect to the rest of the flexible material of the sealing plate wear, shape and also heat resistant, whereby the entire Limiting element has a longer life than previously achieved.

Im Rahmen der Erfindung wird vorgeschlagen, den Verschleißkörper mit dem übrigen Werkstoff der Abdichtplatte durch verkleben, verschweißen, verschrauben, vernieten, einpressen oder eingießen zu verbinden. Der Verschleißkörper ist bei einigen dieser Verbindungsarten dann auch auswechselbar und erhöht dadurch die Standzeit des Begrenzungselementes weiter.In the context of the invention is proposed, the wear body with the rest Material of the sealing plate by gluing, welding, screwing, riveting, press in or pour in to join. The wear body is at some of these Types of connection then also interchangeable and thereby increases the service life of the Limiting element continues.

Als Werkstoff für die Abdichtplatte ist Gummi, Moosgummi, Polyurethan oder dergleichen vorgesehen, wohingegen als Werkstoff für den Verschleißkörper im Rahmen der Erfindung Thermoplaste, wie Polyethylen, Polyester, oder Polymere, wie Polyurethan, Keramik oder Materialmischungen, wie Gummi mit Graphit oder auch sogenannte Lagermetalle, wie Bronze, verwendbar sind. Die Materialien für den Verschleißkörper zeichnen sich durch Formstabilität, Hitzebeständigkeit und vor allem einen niedrigen Reibungskoeffizienten aus.As a material for the sealing plate is rubber, foam rubber, polyurethane or the like, whereas as a material for the wear body in Thermoplastics such as polyethylene, polyester, or polymers, such as Polyurethane, ceramics or material mixtures, such as rubber with graphite or else so-called bearing metals, such as bronze, are usable. The materials for the Wear particles are characterized by dimensional stability, heat resistance and above all a low coefficient of friction.

Der erfindungsgemäße Verschleißkörper kann eine verschieden ausgebildete Oberfläche aufweisen. Demgemäß kann die zum laufenden Untergrund bzw. zur Auftragswalze hin zeigende Oberfläche des Verschleißkörpers eben oder ballig ausgebildet sein. Sie kann aber auch eine schräge Dachform aufweisen oder die Oberfläche kann mit nutenförmigen Einschnitten versehen sein.The wear body according to the invention can have a different design Have surface. Accordingly, the current underground or Application roller facing surface of the wear body even or spherical be educated. But it can also have a sloping roof shape or the Surface can be provided with groove-shaped incisions.

Zusätzlich oder alternativ kann die Oberfläche des Verschleißkörpers mit einer zum ablaufseitigen und oder einlaufseitig angeordneten Element, wie der Stauleiste oder einem weiteren Rakelelement hin gerichteten gefasten oder abgerundeten Kante versehen sein. Diese Ausführungsmöglichkeiten sind nicht nur auf die Genannten beschränkt, sondern es sind weitere Möglichkeiten denkbar, die eine Ablaufmöglichkeit des vom Dosierrakelelement abgestreiften Auftragsmediums zulassen und scharfe Kanten zum laufenden Untergrund vermeiden.Additionally or alternatively, the surface of the wear body with a for drain side and or inlet side arranged element, such as the Stauleiste or a further squeegee element directed towards beveled or rounded edge be provided. These execution options are not only on the named limited, but there are other possibilities conceivable, the one Drain possibility of stripped by Dosierrakelelement application medium allow and avoid sharp edges to the running underground.

Nachfolgend soll die Erfindung anhand eines Ausführungsbeispieles näher erläutert werden. The invention will be explained in more detail with reference to an embodiment become.

Es stellen dar:

Figur 1:
eine grob schematische Seitenansicht einer Auftragsvorrichtung mit Seitenbegrenzungselement und Abdichtplatte gemäß dem Stand der Technik
Figur 2:
eine perspektivische Darstellung der erfindungsgemäßen Vorrichtung mit einem Begrenzungselement, einer Abdichtplatte und einem Verschleißkörper
Figuren 3 bis 6:
verschiedene Ausführungsformen des Verschleißkörpers
They show:
FIG. 1:
a rough schematic side view of an applicator device with side boundary element and sealing plate according to the prior art
FIG. 2:
a perspective view of the device according to the invention with a limiting element, a sealing plate and a wear body
FIGS. 3 to 6:
various embodiments of the wear body

In der Figur 1 ist eine bekannte Auftragsvorrichtung 1 aus dem Stand der Technik dargestellt. FIG. 1 shows a known application device 1 from the prior art.

Diese Vorrichtung 1 ist einem in Laufrichtung L laufenden Untergrund 2 zugeordnet. Bei direktem Auftrag ist der Untergrund 2 die Faserstoffbahn selbst und bei indirektem Auftrag beispielsweise eine Auftragswalze, die an einem hier nicht dargestellten Abschnitt der Walze das von der Auftragsvorrichtung 1 abgegebene Auftragsmedium M auf eine hier ebenfalls nicht sichtbare bis zu 10m und mehr breite Faserstoffbahn aus Papier oder Karton überträgt.This device 1 is assigned to a running in the direction L substrate 2. For direct application, the substrate 2 is the fibrous web itself and at indirect order, for example, an applicator roll, which at one here not shown portion of the roller that issued by the applicator 1 Application medium M on a also not visible here up to 10m and more wide Fiber web of paper or cardboard transfers.

Bei der Vorrichtung 1 handelt es sich um eine sogenannte Auftragseinrichtung mit kurzer Verweilzeit, weil das auf den laufenden Untergrund in einer Auftragskammer 3 aufgebrachte Auftragsmedium M sofort abgerakelt, d.h. auf das gewünschte Strichgewicht gebracht oder nur sofort vergleichmäßigt, d.h. egalisiert wird.The device 1 is a so-called application device with short residence time, because that on the running underground in an order chamber 3 applied application medium M immediately scraped off, i. to the desired Line weight brought or even immediately equalized, i. E. is equalized.

Die Vorrichtung 1 besteht aus einem an die Breite der Faserstoffbahn angepassten Tragbalken 4 und einer Klemmleiste 5, die zwischen sich eine klingenartige Fußleiste 6 einspannen, die wiederum ein Rakelbett 7 trägt zur Aufnahme eines drehbaren, kreiszylinderförmigen Rakelstabes als Rakelelement. Dieses soll als Element 8 bezeichnet sein. Das Element 8 ist am ablaufseitigen Ende der Auftragskammer 3 angeordnet. Das ist jenes Ende, wo der laufende Untergrund 2 von der Auftragskammer ab- bzw. wegläuft. Sinngemäß ist das gegenüberliegende Ende der Auftragskammer das zulaufseitige bzw. einlaufseitige Ende der Auftragskammer 3, also wo der Untergrund 2 der Auftragskammer 3 zuläuft. Zur Begrenzung dieser Kammer 3 ist demgemäß am zulaufseitigen Ende ein weiteres Element 9 angeordnet. In der Figur 1 ist dafür eine Stauleiste vorgesehen. Anstelle der gezeichneten Stauleiste könnte als Element 9 aber auch ein solches Rakelelement, wie das unter Nummer 8 bezeichnete mit Rakelbett 7 und Fußleiste 6, Verwendung finden.The device 1 consists of a matched to the width of the fibrous web Support beam 4 and a terminal block 5, which between them a blade-like baseboard 6 clamp, which in turn carries a doctor bed 7 for receiving a rotatable, circular cylindrical metering rod as doctor element. This is supposed to be element 8 be designated. The element 8 is at the outlet end of the application chamber. 3 arranged. This is the end where the current underground 2 of the Order chamber runs away or runs away. Correspondingly, the opposite end is the Application chamber, the inlet-side and inlet-side end of the application chamber 3, So where the ground 2 of the application chamber 3 tapers. To limit this Chamber 3 is accordingly arranged at the inlet end a further element 9. In the figure 1 for a Stauleiste is provided. Instead of the drawn Stauleiste could as element 9 but also such a squeegee element as the under Number 8 designated with doctor bed 7 and 6 skirting, find use.

Die Auftragskammer 3 wird in ihrer Länge (diese entspricht einem Breitenabschnitt der Vorrichtung 1 bzw. des laufenden Untergrundes 2) begrenzt von seitlichen Begrenzungselementen 10, die auch als Formatbegrenzer bezeichnet werden, weil diese die Auftragsbreite B des mit dem Auftragsmedium M aufgebrachten Striches bestimmen bzw. einen entsprechend verbleibenden strichfreien Rand ermöglichen..
Dabei ist eine Anpassung an die vorhandene Breite der Faserstoffbahn möglich.
The application chamber 3 is limited in its length (this corresponds to a width section of the device 1 or the current substrate 2) of lateral boundary elements 10, which are also referred to as a format delimiter because they determine the application width B of the applied with the application medium M line or allow a corresponding remaining edge free edge ..
An adaptation to the existing width of the fibrous web is possible.

Die Begrenzungselemente 10, wovon je eines am Seitenrand des Untergrundes angeordnet ist, sind fest installiert, können aber auch zur Mitte und nach außen hin verschiebbar eingebaut sein.The boundary elements 10, of which one each on the side edge of the substrate arranged, are fixed, but can also be to the center and to the outside be slidably installed.

Zur Abdichtung der Auftragskammer 3 dienen zusätzliche Abdichtplatten 11, wobei jedes Begrenzungselement 10 mit einer flexiblen Abdichtplatte 11 versehen ist. Die flexible Abdichtplatte besteht aus einem einteilig geformten Dichtmaterial, wie Gummi, Moosgummi oder auch Polyurethan.To seal the application chamber 3 serve additional sealing plates 11, wherein Each limiting element 10 is provided with a flexible sealing plate 11. The flexible sealing plate consists of a one-piece molded sealing material, such as rubber, Foam rubber or polyurethane.

Bei Betrieb der Vorrichtung 1 und den heutigen hohen Maschinengeschwindigkeiten von ca. 2000m/min lassen sich Berührungen der Abdichtplatte mit den eng benachbarten Bauteilen, wie dem laufenden Untergrund 2 und den Rakelelementteilen 7, 8 und der auf der Einlaufseite vorhandenen Stauleiste 9 (welche auch weggelassen sein kann und dafür ein weiteres Rakelelement zur Begrenzung der Auftragskammer 3 vorhanden sein kann) nicht vermeiden, wodurch diese genannten Bauteile aufgrund der hohen Reibung Beschädigungen ausgesetzt sind. Insbesondere ist der Untergrund 2 davon betroffen. Beim indirekten Auftragen, wo der Untergrund als Auftragswalze ausgebildet ist, ist vor allem die Walzenoberfläche (der Bezug der Auftragswalze) gefährdet.During operation of the device 1 and today's high machine speeds of about 2000m / min can touch the sealing plate with the tight neighboring components, such as the current underground 2 and the Doctor blade parts 7, 8 and the existing on the inlet side bar 9 (which can also be omitted and for another squeegee element for Limitation of the application chamber 3 may be present) avoid avoiding these components mentioned due to the high friction damage are. In particular, the underground 2 is affected. For indirect application, where the substrate is designed as an applicator roll, is above all the Roll surface (the reference of the applicator roll) at risk.

Deshalb hat man im rahmen der Erfindung Verschleißkörper entwickelt, die auf die flexiblen Abdichtleisten oder Abdichtplatten aufgesetzt werden und somit erheblich die Standzeiten der besagen gefährdeten Bauteile verlängern.Therefore, it has been developed in the context of the invention wear body on the flexible sealing strips or sealing plates are placed and thus considerably extend the service lives of said hazardous components.

In Figur 2 ist eine solche erfindungsgemäße Vorrichtung 1a perspektivisch dargestellt, bei der die Abdichtplatte 11 mit dem besagten Verschleißkörper 15 aufgerüstet wurde. Sie weist ansonsten dieselben Bauteile wie die aus Figur 1 bekannte Vorrichtung des Standes der Technik auf, weshalb auf eine Wiederholung des Aufbaues hier verzichtet wird.Such a device 1a according to the invention is shown in perspective in FIG. 2 , in which the sealing plate 11 has been upgraded with said wear body 15. It otherwise has the same components as the known from Figure 1 device of the prior art, which is why a repetition of the structure is omitted here.

Aus den Figuren 3 bis 6 sind spezielle Ausführungsformen der dem laufenden Untergrund (ist hier nicht mit dargestellt) zugewandte Oberfläche 17 des Verschleißkörpers 15 zu entnehmen.From the figures 3 to 6 special embodiments of the current underground (not shown here) facing surface 17 of the wear body 15 can be seen.

Figur 2 und 3 zeigen jeweils eine dem Untergrund zugewandte ebene Oberfläche 17 mit abgerundeter Kante 18. Die Kante 18 kann dadurch unbedenklich die Außenfläche des rotierenden Rakelstabes 8 kontaktieren. FIGS. 2 and 3 each show a flat surface 17 with a rounded edge 18 facing the substrate. The edge 18 can thereby contact the outer surface of the rotating metering rod 8 safely.

Eine unterhalb der Oberfläche 17 angeformte Lasche 20 des Verschleißkörpers dient der Befestigung an der Abdichtplatte 11 und /oder am Begrenzungselement 10. Die Verbindung lässt sich komplettieren mit einem in die Lasche 20 einschiebbaren Bolzen 21.A formed below the surface 17 tab 20 of the wear body is used the attachment to the sealing plate 11 and / or the limiting element 10. Die Connection can be completed with a slide into the tab 20 Bolt 21.

Figur 3 zeigt eine einzige Lasche 20. FIG. 3 shows a single tab 20.

In Figur 4 sind zwei voneinander beabstandete Laschen 20 gezeigt. Außerdem weist der Verschleißkörper hier eine ballige Oberfläche 17 auf. In Figure 4 , two spaced tabs 20 are shown. In addition, the wear body here has a spherical surface 17.

Figur 5 und 6 entsprechen in etwa der Ausführung von Figur 4 zeigen aber unterschiedlich ausgeführte Oberflächenformen. Figur 5 zeigt eine Oberfläche 17 mit schräger Dachform und die Figur 6 stellt eine mit nutenartigen Einschnitten 22 versehene Oberfläche dar. FIGS. 5 and 6 approximately correspond to the embodiment of FIG. 4 but show different surface shapes. FIG. 5 shows a surface 17 with an oblique roof shape, and FIG. 6 shows a surface provided with groove-like incisions 22.

Diese Oberflächenformen sind geeignet, um einerseits möglichst geringe Berührungsflächen zum laufenden Untergrund 2 zu bilden und andererseits bestmögliche seitliche Abdichtverhältnisse für das Auftragsmedium M in der Auftragskammer 3 zu garantieren.These surface shapes are suitable, on the one hand as small as possible Forming contact surfaces to the current surface 2 and on the other best possible lateral sealing conditions for the application medium M in the Order Chamber 3 to guarantee.

Der Verschleißkörper 15 kann mit dem übrigen Werkstoff der Abdichtplatte 11 verklebt, verschweißt, verschraubt, vernietet, eingepresst oder auch eingegossen werden. Der Verschleißkörper 15 ist bei einigen dieser Verbindungsarten dann auch auswechselbar und erhöht dadurch die Standzeit des Begrenzungselementes als Ganzes weiter.The wear body 15 can with the rest of the material of the sealing plate 11th glued, welded, bolted, riveted, pressed or cast become. The wear body 15 is then also in some of these types of connections replaceable and thereby increases the service life of the limiting element as Whole thing.

Als Werkstoff für das Begrenzungselement 10 und die Abdichtplatte 11 ist Gummi, Moosgummi, Polyurethan oder dergleichen vorgesehen, wohingegen als Werkstoff für den Verschleißkörper 15 verschleißfestere Werksstoffe, wie Thermoplaste aus beispielsweise Polyethylen, Polyester, oder auch Keramik oder Materialmischungen, wie Gummi mit Graphit oder auch sogenannte Lagermetalle, wie Bronze verwendbar sind.As a material for the limiting element 10 and the sealing plate 11 is rubber, Sponge rubber, polyurethane or the like provided, whereas as a material for the wear body 15 more wear-resistant materials, such as thermoplastics For example, polyethylene, polyester, or ceramic or material mixtures, such as rubber with graphite or so-called bearing metals, such as bronze usable are.

Die Werkstoffe für den Verschleißkörper 15 zeichnen sich durch Formstabilität, Hitzebeständigkeit und vor allem einen niedrigen Reibungskoeffizienten als die Werkstoffe, die bisher nur allein für die Abdichtplatten 11 oder die Begrenzungselemente 10 verwendet wurden aus.The materials for the wear body 15 are characterized by dimensional stability, Heat resistance and especially a low coefficient of friction than the Materials that were previously only for the sealing plates 11 or the Limiting elements 10 were used off.

Es soll noch erwähnt sein, dass der Verschleißkörper nicht nur bei der dargestellten Vorrichtung 1a, einer SDTA-Vorrichtung anwendbar ist, sondern auch auf die bekannten flexiblen Formatschieber, die die Länge der Dosierspalte von Freistrahlauftragsdüsen begrenzen, aufsetzbar sind. It should be mentioned that the wear body not only in the illustrated Device 1a, an SDTA device is applicable, but also to the known flexible format slider, the length of the dosing of Limit free jet application nozzles, can be placed.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Auftragsvorrichtungapplicator
22
Untergrundunderground
33
Auftragskammerapplication chamber
44
Tragbalkenstringers
55
Klemmleisteterminal block
66
Fußleistebaseboard
77
Rakelbettdoctor bed
88th
Rakelelementdoctor element
99
Stauleistedamming strip
1010
Begrenzungselementlimiting element
1111
Abdichtplattesealing
1515
Verschleißkörperwear body
1717
Oberfläche des VerschleißkörpersSurface of the wear body
1818
Kanteedge
2020
Lascheflap
2121
Bolzenbolt
LL
Laufrichtungdirection
MM
Auftragsmediumapplication medium

Claims (7)

Vorrichtung zum Auftragen eines flüssigen oder pastösen Mediums auf einen laufenden Untergrund, wobei der Untergrund (2) bei direktem Auftrag die Oberfläche einer Papier-, Karton- oder anderen Faserstoffbahn und bei indirektem Auftrag die Oberfläche eines Übertragselementes ist, welche das Auftragsmedium (M) an die Faserstoffbahn abgibt,
umfassend:
eine Auftragskammer (3), die bezogen auf die Laufrichtung (L) des laufenden Untergrundes (2) zumindest ablaufseitig von einem Element (8), beispielsweise einem Rakelelement (8) und einlaufseitig von einem weiteren Element (9), beispielsweise einer Stauleiste oder einem weiteren Rakelelement begrenzt ist und die Auftragskammer (3) an ihrem seitlichen Ende jeweils ein Begrenzungselement (10) zur Einstellung der Auftragsbreite aufweist, wobei das Begrenzungselement (10) mit einer flexiblen Abdichtplatte (11) bestückt ist, die den Raum zwischen dem laufenden Untergrund (2) und dem ablauf- und einlaufseitig angeordneten Elementen (8, 9) im Wesentlichen abdichtet,
dadurch gekennzeichnet, dass
die Abdichtplatte (11) einen zum laufenden Untergrund (2) und den ablauf- und einlaufseitigen Elementen (8, 9) gerichteten, aufgesetzten Verschleißkörper (15) aufweist.
Device for applying a liquid or pasty medium to a running substrate, wherein the substrate (2) for direct application, the surface of a paper, cardboard or other fibrous web and indirect application is the surface of a transfer element which the application medium (M) emits the fibrous web,
full:
an application chamber (3), with respect to the running direction (L) of the running substrate (2) at least on the outlet side of an element (8), for example a squeegee element (8) and inlet side of a further element (9), for example a Stauleiste or a further doctor element is limited and the application chamber (3) at its lateral end in each case a limiting element (10) for adjusting the application width, wherein the limiting element (10) is equipped with a flexible sealing plate (11), the space between the running surface ( 2) and the outlet and inlet side arranged elements (8, 9) substantially seals,
characterized in that
the sealing plate (11) facing the current substrate (2) and the drain and inlet side elements (8, 9), mounted wear body (15).
Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass
der Verschleißkörper (15) in Bezug auf den übrigen flexiblen Werkstoff der Abdichtplatte (11) verschleiß-, form- und hitzebeständiger ist und einen geringen Reibungskoeffizienten aufweist..
Device according to claim 1,
characterized in that
the wear body (15) is wear, shape and heat resistant with respect to the other flexible material of the sealing plate (11) and has a low coefficient of friction.
Vorrichtung nach Anspruch 1 und 2,
dadurch gekennzeichnet, dass
der Verschleißkörper (15) mit dem übrigen Werkstoff der Abdichtplatte (11) durch verkleben, verschweißen, verschrauben, vernieten, einpressen oder eingießen verbunden ist.
Device according to claims 1 and 2,
characterized in that
the wear body (15) with the remaining material of the sealing plate (11) by gluing, welding, screwing, riveting, press-fitting or pouring is connected.
Vorrichtung nach Anspruch 1 bis 3,
dadurch gekennzeichnet, dass
als Werkstoff für die Abdichtplatte (11) Gummi, Moosgummi, Polyurethan oder dergleichen und als Werkstoff für den Verschleißkörper (15) Thermoplaste, wie Polyethylen, Polyester, oder Polymere, wie Polyurethan, Keramik oder Materialmischungen, wie Gummi mit Graphit oder auch sogenannte Lagermetalle, wie Bronze verwendbar sind.
Apparatus according to claim 1 to 3,
characterized in that
as material for the sealing plate (11) rubber, sponge rubber, polyurethane or the like and as a material for the wear body (15) thermoplastics, such as polyethylene, polyester, or polymers, such as polyurethane, ceramic or material mixtures, such as rubber with graphite or so-called bearing metals, like bronze are usable.
Vorrichtung nach Anspruch 1 bis 4,
dadurch gekennzeichnet, dass
der Verschleißkörper (15) auswechselbar ist.
Device according to claims 1 to 4,
characterized in that
the wear body (15) is replaceable.
Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, dass
die die zum laufenden Untergrund (2) zeigende Oberfläche (17) des Verschleißkörpers (15) eben oder ballig ausgebildet ist, oder eine Dachform aufweist oder mit nutenförmigen Einschnitten (22) versehen ist und/oder mit einer zum einlauf- und/oder ablaufseitigen Element (8, 9) hin gerichteten gefasten oder abgerundeten Kante (18) versehen ist.
Device according to claim 4,
characterized in that
the surface (17) of the wear body (15) facing the running surface (2) is flat or convex, or has a roof shape or is provided with groove-shaped notches (22) and / or with an inlet and / or outlet side element (8, 9) directed towards beveled or rounded edge (18).
Vorrichtung nach einem oder mehreren der Ansprüche 1 bis 6,
dadurch gekennzeichnet, dass
das ablaufseitig angeordnete Element (8) als kreiszylindrischer Rakelstab und das einlaufseitig angeordnete Element ebenfalls als Rakelstab oder als flache Stauleiste ausgebildet ist.
Device according to one or more of claims 1 to 6,
characterized in that
the outlet side arranged element (8) is designed as a circular cylindrical metering rod and the inlet side arranged element also as a metering rod or as a flat Stauleiste.
EP05103657A 2004-06-16 2005-05-03 Coating device Not-in-force EP1607141B1 (en)

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DE102004028755A DE102004028755A1 (en) 2004-06-16 2004-06-16 applicator
DE102004028755 2004-06-16

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AT (1) ATE359869T1 (en)
DE (2) DE102004028755A1 (en)

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Also Published As

Publication number Publication date
EP1607141B1 (en) 2007-04-18
US7669550B2 (en) 2010-03-02
ATE359869T1 (en) 2007-05-15
DE502005000600D1 (en) 2007-05-31
DE102004028755A1 (en) 2006-01-12
US20050284364A1 (en) 2005-12-29

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