EP1593440A2 - Doctor blade - Google Patents

Doctor blade Download PDF

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Publication number
EP1593440A2
EP1593440A2 EP05102326A EP05102326A EP1593440A2 EP 1593440 A2 EP1593440 A2 EP 1593440A2 EP 05102326 A EP05102326 A EP 05102326A EP 05102326 A EP05102326 A EP 05102326A EP 1593440 A2 EP1593440 A2 EP 1593440A2
Authority
EP
European Patent Office
Prior art keywords
doctor
hose
additional element
clamping device
opening
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
EP05102326A
Other languages
German (de)
French (fr)
Other versions
EP1593440B1 (en
EP1593440A3 (en
Inventor
Eckard Wozny
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 Patent GmbH
Voith Paper Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH, Voith Paper Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1593440A2 publication Critical patent/EP1593440A2/en
Publication of EP1593440A3 publication Critical patent/EP1593440A3/en
Application granted granted Critical
Publication of EP1593440B1 publication Critical patent/EP1593440B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/044—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for holding the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G3/00—Doctors

Definitions

  • the invention relates to a squeegee device for means for applying liquid to pasty media on a running surface with a against the Surface pressing doctor element for dosing and / or homogenization of the applied medium and with the squeegee element holding Clamping device, a first pressurizable hose for Close and a second pressurizable hose to open the Chuck.
  • FIG. 1 For better understanding. She has one Clamping device 11, in which a not shown here squeegee element between a support bar 12 and a guide bar 13 can be clamped. To the Clamping of the doctor element, not shown, a first tube 14 with a Pressure, in particular pressurized air, whereby the tube 14 expands and the support bar 12 and the guide rail 13 in the clamping area E, in which the Squeegee element is to be held, clash. To open the Clamping device 11 serves a second parallel and by a Retaining strip 16 of separate hose 15. If this is under pressure it expands and the first tube is relieved, i. the first Hose 14 is compressed.
  • a Pressure in particular pressurized air
  • the clamping device 11 To change the doctor element is the clamping device 11 only opened to an intermediate position.
  • This is the second tube 15 with a certain pressure which is less than the maximum Pressure, as far as expanded to balls 17 by means of springs 18 in recesses 19th be pressed.
  • An edge 19 a of the recesses 19 prevents the Clamping device 11 for changing the doctor element via the intermediate position can be opened out when the lower pressure is applied.
  • the second tube 15 is at the maximum pressure acted upon, so that the balls 17 over the edge 19 a of the recesses 19th be pushed out.
  • the squeegee device 10 requires a pressure control for the second tube 15 to the clamping device 11 to the intermediate position to open. This requires a certain amount of control. Furthermore require the holes for receiving the springs 18 and the recesses 19th a certain amount of space.
  • the springs 18 and the balls 17 are mechanically stressed components that can wear out over time, wherein the springs 18 also to a function impairing pollution tend. Over time, when closed, the Clamping device 11 by the punctiform load of the balls 17th form unwanted depressions in the support bar 12.
  • the invention has the object of the doctor device of the type mentioned be improved so that the disadvantages mentioned avoided in the future become.
  • the invention solves the problem by a squeegee device of the beginning mentioned type according to the invention with an additional element for opening the Clamping device is equipped.
  • This additional element has a less stroke than the second hose available for opening.
  • the additional element actuated, the stroke as I said, is less than the stroke of the hose.
  • the second hose which is also referred to as opening hose, actuated, and the first tube, i. the clamping tube relieved.
  • opening hose which is also referred to as opening hose, actuated
  • first tube i. the clamping tube relieved.
  • the additional element may be elastic be deformable. Consequently, when closing the clamping device be compressed, and when opening the chuck back in reset its original shape.
  • the additional element realize, if it is also designed as a hose.
  • the additional element and / or the hose can be attached to an existing one Compressed air supply connected and to open the clamping device with Compressed air are applied.
  • the clamping device can be with little Open design effort, with existing already Utilities can be used.
  • the additional element can only one be elongated rubber strip.
  • the rubber strip is naturally elastic deformable. If the clamping hose is vented, this causes elastic Rubber strips by its rebound that the clamping, i. the Clamping device opens a small defined piece. This little piece Opening width is completely sufficient for changing the doctor element. Consequently the rubber strip a structurally particularly simple and therefore cost-effective Solution dar. For this alternative, foam rubber has been well proven.
  • the additional element in the arranged to open the clamping device provided second hose.
  • the additional element through the surrounding hose protected.
  • the additional element has only a total size of maximum 1/3 of the opening hose.
  • the additional element can be retrofitted. Then you can too existing doctoring devices with the advantages of the invention Squeegee device to be equipped.
  • the invention relates to offline or online (i.e. Manufacturing machine, i. Paper machine for a fibrous web) operated Coater.
  • This coating device according to the invention has a Doctor device according to one of claims 1 to 8 and is for the one-sided or two-sided, direct or indirect coating of a running fibrous web, in particular of paper or cardboard with a liquid to pasty medium intended. The coating is used to refine the fibrous web made good printing properties for later printing in To reach printing presses.
  • FIG. 2 shows a doctor device 20 with a clamping device 21.
  • a doctor element 22 in the form of a machine-wide coating blade, is held in the example shown.
  • the clamping device 21 has a support strip 23 and a guide rail 24. Between the guide rail 24 and a retaining strip 25 is acted upon by compressed air first hose 26 for closing the clamping device 21 is arranged. Between the retaining strip 25 and a base body 27 there are a second hose 28 and also formed as a hose additional element 29. The additional element 29 is placed inside the hose 28.
  • the jig 21 holds the squeegee element 22
  • the second tube 28 and the additional element 29 are compressed.
  • the clamping device 21 can be opened. When opening the clamping device 21, however, the first tube 26 is pressed together.
  • the clamping device 21 of the doctor device 20 is opened and the squeegee element 22 is already removed, for example, to be replaced with a squeegee element with newly ground tip.
  • the clamping device 21 only has to be opened slightly.
  • the additional element 29 is acted upon by compressed air, whereby the retaining strip 25 and thus the support bar 23 are moved by a relatively small stroke.
  • the second tube 28, which surrounds the additional element 29, need not be pressurized with compressed air to change the doctor element 22.
  • the hose 28 which has a diameter which is several times greater than the hose-like additional element 29, is pressurized with compressed air.
  • the retaining strip 25 and the support strip 23 are moved by a large stroke.
  • the additional element 29 does not have to be subjected to compressed air for cleaning work.
  • the additional element 29 does not have to be formed like a tube, but can also be an elongated rubber strip.
  • This elongated rubber strip is elastically deformable and opens to change the doctor element 22 with his Restoring force the clamping device 21, once in the tube 26 of the therein prevailing pressure is reduced.
  • the additional element 29 may also be next to it be arranged along the hose 28.
  • the strokes of the add additional element 29 and the hose 28, so that the hose 28th smaller can be dimensioned to the doctor device 20 to Cleaning purposes with a large stroke to open.
  • the doctor device according to the invention is used for devices for applying liquid to pasty media on a running surface O.
  • this surface O is shown only in FIG. 2 and represents a running paper, board or other fibrous web when the application medium is directly applied.
  • the surface O is a transfer element, for example an applicator roll or a circulating belt Transfer element then transfers the application medium to the moving fibrous web in a so-called nip.
  • the squeegee element 22 which presses against the surface O serves for metering and / or equalizing the applied medium and, as shown in FIG. 2 , can be designed as a doctor blade.
  • the doctor element 22 can also be a rotatable grooved or smooth doctor bar which is accommodated in a doctor bed, which in turn is supported on a blade-like foot (formed approximately in the same way as the doctor blade of FIG. 2).

Landscapes

  • Paper (AREA)
  • Coating Apparatus (AREA)

Abstract

In a papermaking process a semi-liquid suspension of fibrous material is spread evenly over a flat moving surface by a scraper blade (22) secured within a clamp. The clamping action is effected by two inflatable hoses (14, 26). The clamp action is supported by a rubber hose (29) whose contraction distance is less than that of the second hose (28). The supplementary hose (29) can also be retro-fitted to existing machinery.

Description

Die Erfindung betrifft eine Rakelvorrichtung für Einrichtungen zum Auftragen von flüssigen bis pastösen Medien auf eine laufende Oberfläche mit einem gegen die Oberfläche drückenden Rakelelement zur Dosierung und/oder Vergleichmäßigung des aufgebrachten Mediums und mit einer das Rakelelement haltenden Einspanneinrichtung, einem ersten mit Druck beaufschlagbaren Schlauch zum Schließen und einem zweiten mit Druck beaufschlagbaren Schlauch zum Öffnen der Einspanneinrichtung.The invention relates to a squeegee device for means for applying liquid to pasty media on a running surface with a against the Surface pressing doctor element for dosing and / or homogenization of the applied medium and with the squeegee element holding Clamping device, a first pressurizable hose for Close and a second pressurizable hose to open the Chuck.

Aus dem Stand der Technik ist eine gattungsgemäße Rakelvorrichtung 10 bekannt. Diese ist zum besseren Verständnis in Figur 1 dargestellt. Sie weist eine Einspanneinrichtung 11 auf, in die ein hier nicht dargestelltes Rakelelement zwischen eine Stützleiste 12 und eine Führungsleiste 13 eingespannt werden kann. Zum Einspannen des nicht gezeigten Rakelelements wird ein erster Schlauch 14 mit einem Druck, insbesondere Druckluft beaufschlagt, wodurch der Schlauch 14 expandiert und die Stützleiste 12 und die Führungsleiste 13 im Einspannbereich E, in dem das Rakelelement gehalten werden soll, aneinanderstoßen. Zum Öffnen der Einspanneinrichtung 11 dient ein zweiter parallel verlaufender und durch eine Halteleiste 16 von einander getrennter Schlauch 15. Wird dieser mit Druck beaufschlagt, expandiert er und der erste Schlauch wird entlastet, d.h. der erste Schlauch 14 wird dabei zusammengedrückt. Zum Wechseln des Rakelelements wird die Einspanneinrichtung 11 nur bis zu einer Zwischenstellung geöffnet. Dazu wird der zweite Schlauch 15 mit einem bestimmten Druck, der geringer ist als der maximale Druck, soweit expandiert bis Kugeln 17 mittels Federn 18 in Ausnehmungen 19 gedrückt werden. Ein Rand 19a der Ausnehmungen 19 verhindert, dass die Einspanneinrichtung 11 zum Wechseln des Rakelelements über die Zwischenstellung hinaus geöffnet werden kann, wenn der geringere Druck anliegt. Zu Reinigungsarbeiten an der Rakelvorrichtung 10, der eine größere Öffnungsweite als beim Rakelwechsel erfordert, wird der zweite Schlauch 15 mit dem maximalen Druck beaufschlagt, sodass die Kugeln 17 über den Rand 19a der Ausnehmungen 19 hinaus gedrückt werden.From the prior art, a generic doctor device 10 is known. This is shown in FIG. 1 for better understanding. She has one Clamping device 11, in which a not shown here squeegee element between a support bar 12 and a guide bar 13 can be clamped. To the Clamping of the doctor element, not shown, a first tube 14 with a Pressure, in particular pressurized air, whereby the tube 14 expands and the support bar 12 and the guide rail 13 in the clamping area E, in which the Squeegee element is to be held, clash. To open the Clamping device 11 serves a second parallel and by a Retaining strip 16 of separate hose 15. If this is under pressure it expands and the first tube is relieved, i. the first Hose 14 is compressed. To change the doctor element is the clamping device 11 only opened to an intermediate position. This is the second tube 15 with a certain pressure which is less than the maximum Pressure, as far as expanded to balls 17 by means of springs 18 in recesses 19th be pressed. An edge 19 a of the recesses 19 prevents the Clamping device 11 for changing the doctor element via the intermediate position can be opened out when the lower pressure is applied. To Cleaning work on the doctor device 10, which has a larger opening width than When the blade replacement is required, the second tube 15 is at the maximum pressure acted upon, so that the balls 17 over the edge 19 a of the recesses 19th be pushed out.

Nachteilig bei dieser aus dem Stand der Technik bekannten Rakelvorrichtung 10 ist, dass bei ihrer Herstellung Bohrungen zur Aufnahme der Federn 18 vorgesehen und die Ausnehmungen 19 gefertigt werden müssen. Ferner müssen die Federn 18 und die Kugeln 17 montiert werden. Dies erhöht den Fertigungs- und Montageaufwand für die Rakelvorrichtung 10. Die Rakelvorrichtung 10 erfordert eine Drucksteuerung für den zweiten Schlauch 15, um die Einspanneinrichtung 11 bis zur Zwischenstellung zu öffnen. Hierzu ist ein bestimmter Steuerungsaufwand erforderlich. Außerdem erfordern die Bohrungen zur Aufnahme der Federn 18 und die Ausnehmungen 19 einen bestimmten Platzbedarf. Bei den Federn 18 und den Kugeln 17 handelt es sich um mechanisch beanspruchte Bauteile, die im Laufe der Zeit verschleißen können, wobei die Federn 18 auch zu einer ihre Funktion beeinträchtigende Verschmutzung neigen. Im Laufe der Zeit können sich im geschlossenen Zustand der Einspanneinrichtung 11 durch die punktförmige Belastung der Kugeln 17 unerwünschte Vertiefungen in der Stützleiste 12 bilden.A disadvantage of this known from the prior art doctor device 10, that provided in their preparation holes for receiving the springs 18 and the recesses 19 must be made. Furthermore, the springs 18 and the balls 17 are mounted. This increases the manufacturing and assembly costs for the squeegee device 10. The squeegee device 10 requires a pressure control for the second tube 15 to the clamping device 11 to the intermediate position to open. This requires a certain amount of control. Furthermore require the holes for receiving the springs 18 and the recesses 19th a certain amount of space. The springs 18 and the balls 17 are mechanically stressed components that can wear out over time, wherein the springs 18 also to a function impairing pollution tend. Over time, when closed, the Clamping device 11 by the punctiform load of the balls 17th form unwanted depressions in the support bar 12.

Die Erfindung hat die Aufgabe die Rakelvorrichtung der eingangs genannten Art dahingehend zu verbessern, dass die genannten Nachteile zukünftig vermieden werden.The invention has the object of the doctor device of the type mentioned be improved so that the disadvantages mentioned avoided in the future become.

Die Erfindung löst die gestellte Aufgabe durch eine Rakelvorrichtung der eingangs genannten Art, die erfindungsgemäß mit einem zusätzlichen Element zum Öffnen der Einspanneinrichtung ausgerüstet ist. Dieses zusätzliche Element weist einen geringeren Hub auf als der zweite zum Öffnen vorhandene Schlauch. Dadurch können auf die aus dem Stand der Technik bekannten Federn 18, die Kugeln 17, die die Feder 18 aufnehmenden Bohrungen und die Ausnehmungen 19 verzichtet werden. Zum Wechseln des Rakelelements wird zukünftig das zusätzliche Element betätigt, dessen Hub wie gesagt, geringer ist als der Hub des Schlauchs. Somit öffnet das zusätzliche Element die Rakelvorrichtung nur bis zur Zwischenstellung, in der dann das Rakelelement ausgewechselt werden kann. Wenn die Rakelvorrichtung zu Reinigungszwecken über die Zwischenstellung hinaus geöffnet werden muss, wird der zweite Schlauch, der auch als Öffnungsschlauch bezeichnet wird, betätigt, und der erste Schlauch, d.h. der Klemmschlauch entlastet. Bei Einsatz der erfindungsgemäßen Rakelvorrichtung ist die Anzahl an Verschleißteilen erheblich reduziert, wodurch die Betriebssicherheit der Rakelvorrichtung verbessert wird. Durch den Wegfall der Bohrungen und der Ausnehmungen werden die Fertigungs- und Montagekosten deutlich gesenkt und der Platzbedarf für die Rakelvorrichtung reduziert.The invention solves the problem by a squeegee device of the beginning mentioned type according to the invention with an additional element for opening the Clamping device is equipped. This additional element has a less stroke than the second hose available for opening. Thereby can on the known from the prior art springs 18, the balls 17, the omitted the spring 18 receiving holes and the recesses 19 become. To change the doctor element in the future, the additional element actuated, the stroke as I said, is less than the stroke of the hose. Thus opens the additional element the squeegee device only to the intermediate position, in the then the squeegee element can be replaced. When the squeegee device too Cleaning purposes beyond the intermediate position must be opened the second hose, which is also referred to as opening hose, actuated, and the first tube, i. the clamping tube relieved. When using the Doctor device according to the invention, the number of wearing parts is considerable reduced, whereby the reliability of the doctor device is improved. By The elimination of the holes and the recesses are the manufacturing and Installation costs significantly reduced and the space required for the doctor device reduced.

In einer bevorzugten Ausführungsform kann das zusätzliche Element elastisch verformbar sein. Folglich kann es beim Schließen der Einspanneinrichtung zusammengedrückt werden, und sich beim Öffnen der Einspanneinrichtung wieder in seine ursprüngliche Form zurückstellen.In a preferred embodiment, the additional element may be elastic be deformable. Consequently, when closing the clamping device be compressed, and when opening the chuck back in reset its original shape.

Konstruktiv besonders einfach und kostengünstig lässt sich das zusätzliche Element realisieren, wenn es ebenfalls als ein Schlauch ausgebildet ist.Constructively particularly simple and inexpensive, the additional element realize, if it is also designed as a hose.

Das zusätzliche Element und/oder der Schlauch können an eine vorhandene Druckluftversorgung angeschlossen und zum Öffnen der Einspanneinrichtung mit Druckluft beaufschlagt werden. Somit lässt sich die Einspanneinrichtung mit geringem konstruktiven Aufwand öffnen, wobei auf schon bestehende Versorgungseinrichtungen zurückgegriffen werden kann.The additional element and / or the hose can be attached to an existing one Compressed air supply connected and to open the clamping device with Compressed air are applied. Thus, the clamping device can be with little Open design effort, with existing already Utilities can be used.

In diesem Zusammenhang ist es denkbar, dass das zusätzliche Element von einer Vorrichtungsseite her und der zweite Schlauch von der anderen Vorrichtungsseite her mit Druckluft beaufschlagt werden. Diese Ausführung bedeutet allerdings einen zusätzlichen apparativen Aufwand. Deshalb ist es zweckmäßiger, wenn dass zusätzliche Element und der zweite Schlauch an derselben Vorrichtungsseite, d.h. den Stirnseiten, beispielsweise an der Führerseite einer Maschine zur Herstellung und/oder Veredelung einer Faserstoffbahn, über ein Anschlussstück mit der Druckluftzufuhr verbunden sind. Auf der anderen Vorrichtungsseite (z.B. der Triebseite) sind dann beide Elemente verschlossen.In this context, it is conceivable that the additional element of a Device side and the second hose from the other side of the device be acted upon with compressed air. This version, however, means one additional equipment expense. Therefore, it is more appropriate if that additional element and the second tube on the same device side, i. the front sides, for example, on the leader side of a machine for manufacturing and / or finishing a fibrous web, via a connecting piece with the Compressed air supply are connected. On the other side of the device (e.g. Drive side) then both elements are closed.

In einer weiteren bevorzugten Ausführungsform kann das zusätzliche Element nur ein länglicher Gummistreifen sein. Der Gummistreifen ist naturgemäß elastisch verformbar. Wird der Klemmschlauch entlüftet, bewirkt dieser elastische Gummistreifen durch sein Ausfedern, dass die Klemmung, d.h. die Einspanneinrichtung ein kleines definiertes Stück öffnet. Dieses kleine Stück Öffnungsweite ist zum Wechseln des Rakelelements völlig ausreichend. Folglich stellt der Gummistreifen eine konstruktiv besonders einfache und somit kostengünstige Lösung dar. Für diese Alternative hat sich Moosgummi gut bewährt.In a further preferred embodiment, the additional element can only one be elongated rubber strip. The rubber strip is naturally elastic deformable. If the clamping hose is vented, this causes elastic Rubber strips by its rebound that the clamping, i. the Clamping device opens a small defined piece. This little piece Opening width is completely sufficient for changing the doctor element. Consequently the rubber strip a structurally particularly simple and therefore cost-effective Solution dar. For this alternative, foam rubber has been well proven.

Besonders platzsparend und elegant ist es, wenn das zusätzliche Element in dem zum Öffnen der Einspanneinrichtung vorgesehenen zweiten Schlauch angeordnet ist. Außerdem wird dann das zusätzliche Element durch den ihn umgebenden Schlauch geschützt. Das zusätzliche Element weist dabei nur eine Gesamtgröße von maximal 1/3 des Öffnungsschlauches auf.It is particularly space-saving and elegant, if the additional element in the arranged to open the clamping device provided second hose. In addition, then the additional element through the surrounding hose protected. The additional element has only a total size of maximum 1/3 of the opening hose.

Es ist jedoch auch möglich, das zusätzliche Element und den zum Öffnen der Einspanneinrichtung vorgesehenen zweiten Schlauch nebeneinander entlanglaufend anzuordnen. Dadurch addieren sich die Hübe des zusätzlichen Elementes und des Öffnungsschlauchs, sodass auch dieser kleiner dimensioniert werden kann.However, it is also possible to use the additional element and to open the Clamping provided second hose along side by side to arrange. This adds up the strokes of the additional element and the Opening hose, so that even this can be dimensioned smaller.

Das zusätzliche Element kann nachrüstbar sein. Dann können auch schon bestehende Rakelvorrichtungen mit den Vorteilen der erfindungsgemäßen Rakelvorrichtung ausgestattet werden.The additional element can be retrofitted. Then you can too existing doctoring devices with the advantages of the invention Squeegee device to be equipped.

Außerdem betrifft die Erfindung eine offline oder online (d.h. innerhalb einer Herstellungsmaschine, d.h. Papiermaschine für eine Faserstoffbahn) betriebene Streicheinrichtung. Diese Streicheinrichtung weist erfindungsgemäß eine Rakelvorrichtung nach einem der Ansprüche 1 bis 8 auf und ist für die einseitige oder beidseitige, direkte oder indirekte Beschichtung einer laufenden Faserstoffbahn, insbesondere aus Papier oder Karton mit einem flüssigen bis pastösen Medium vorgesehen. Die Beschichtung wird zur Veredelung der Faserstoffbahn vorgenommen, um gute Bedruckungseigenschaften für spätere Druckverfahren in Druckmaschinen erreichen zu können.Moreover, the invention relates to offline or online (i.e. Manufacturing machine, i. Paper machine for a fibrous web) operated Coater. This coating device according to the invention has a Doctor device according to one of claims 1 to 8 and is for the one-sided or two-sided, direct or indirect coating of a running fibrous web, in particular of paper or cardboard with a liquid to pasty medium intended. The coating is used to refine the fibrous web made good printing properties for later printing in To reach printing presses.

Nachfolgend wird ein Ausführungsbeispiel anhand der beiliegenden Zeichnungen näher erläutert.Hereinafter, an embodiment with reference to the accompanying drawings explained in more detail.

Im Einzelnen zeigen:

Fig. 1
eine aus dem Stand der Technik bekannte Rakelvorrichtung;
Fig. 2
eine erfindungsgemäße Rakelvorrichtung mit einem eingespannten Rakelelement;
Fig. 3
die Rakelvorrichtung aus Fig. 2, die zum Wechseln des Rakelelements geöffnet ist; (Zwischenstellung)
Fig. 4
die Rakelvorrichtung aus Fig. 3, die zur Reinigung geöffnet ist.
In detail show:
Fig. 1
a known from the prior art doctor device;
Fig. 2
a doctor device according to the invention with a clamped doctor element;
Fig. 3
the doctor device of Figure 2, which is open to change the doctor element; (Intermediate position)
Fig. 4
the squeegee device of Fig. 3, which is open for cleaning.

Fig. 2 zeigt eine Rakelvorrichtung 20 mit einer Einspanneinrichtung 21. Mit der Einspanneinrichtung 21 wird im dargestellten Beispiel ein Rakelelement 22, in Form einer maschinenbreiten Streichklinge gehalten. Die Einspanneinrichtung 21 weist eine Stützleiste 23 und eine Führungsleiste 24 auf. Zwischen der Führungsleiste 24 und einer Halteleiste 25 ist ein mit Druckluft beaufschlagbarer erster Schlauch 26 zum Schließen der Einspanneinrichtung 21 angeordnet. Zwischen der Halteleiste 25 und einem Grundkörper 27 befinden sich ein zweiter Schlauch 28 und ein ebenfalls als Schlauch ausgebildetes zusätzliches Element 29. Das zusätzliche Element 29 ist im Inneren des Schlauches 28 platziert. Wenn die Einspanneinrichtung 21 das Rakelelement 22 hält, werden der zweite Schlauch 28 und das zusätzliche Element 29 zusammengedrückt. Durch Beaufschlagung des zweiten Schlauchs 28 und des zusätzlichen Elementes 29 mit Druckluft kann die Einspanneinrichtung 21 geöffnet werden. Beim Öffnen der Einspanneinrichtung 21 wird dagegen der erste Schlauch 26 zusammen gedrückt. 2 shows a doctor device 20 with a clamping device 21. With the clamping device 21, a doctor element 22, in the form of a machine-wide coating blade, is held in the example shown. The clamping device 21 has a support strip 23 and a guide rail 24. Between the guide rail 24 and a retaining strip 25 is acted upon by compressed air first hose 26 for closing the clamping device 21 is arranged. Between the retaining strip 25 and a base body 27 there are a second hose 28 and also formed as a hose additional element 29. The additional element 29 is placed inside the hose 28. When the jig 21 holds the squeegee element 22, the second tube 28 and the additional element 29 are compressed. By loading the second tube 28 and the additional element 29 with compressed air, the clamping device 21 can be opened. When opening the clamping device 21, however, the first tube 26 is pressed together.

In Fig. 3 ist die Einspanneinrichtung 21 der Rakelvorrichtung 20 geöffnet und das Rakelelement 22 ist bereits ausgebaut, um beispielsweise gegen ein Rakelelement mit neu angeschliffener Spitze getauscht zu werden. Hierzu muss die Einspanneinrichtung 21 nur etwas geöffnet werden. Zum Öffnen der Einspanneinrichtung 21 für den Wechsel des Rakelelements 22 wird nur das zusätzliche Element 29 mit Druckluft beaufschlagt, wodurch die Halteleiste 25 und somit die Stützleiste 23 um einen relativ geringen Hub verschoben werden. Dadurch wird die Einspanneinrichtung 21 bzw. die Einspannstelle E weit genug geöffnet, um das Rakelelement 22 wechseln zu können. Der zweite Schlauch 28, der das zusätzliche Element 29 umgibt, muss zum Wechseln des Rakelelements 22 nicht mit Druckluft beaufschlagt werden.In Fig. 3 , the clamping device 21 of the doctor device 20 is opened and the squeegee element 22 is already removed, for example, to be replaced with a squeegee element with newly ground tip. For this purpose, the clamping device 21 only has to be opened slightly. To open the clamping device 21 for the change of the doctor element 22, only the additional element 29 is acted upon by compressed air, whereby the retaining strip 25 and thus the support bar 23 are moved by a relatively small stroke. As a result, the clamping device 21 or the clamping point E is opened far enough to change the doctor element 22 can. The second tube 28, which surrounds the additional element 29, need not be pressurized with compressed air to change the doctor element 22.

Für Reinigungsarbeiten der Rakelvorrichtung 20 ist es zweckmäßig die Einspanneinrichtung 21 weiter zu öffnen als dies zum Wechseln des Rakelelements 22 erforderlich ist. Diese Möglichkeit ist in Fig. 4 dargestellt. Deshalb wird für Reinigungszwecke der Schlauch 28, der einen mehrfach größeren Durchmesser aufweist als das schlauchartig ausgebildete zusätzliche Element 29, mit Druckluft beaufschlagt. Dadurch werden die Halteleiste 25 und die Stützleiste 23 um einen großen Hub verschoben. Das zusätzliche Element 29 muss für Reinigungsarbeiten nicht mit Druckluft beaufschlagt werden.For cleaning work of the doctor device 20, it is expedient to open the clamping device 21 further than is necessary for changing the doctor element 22. This possibility is shown in FIG. 4 . Therefore, for cleaning purposes, the hose 28, which has a diameter which is several times greater than the hose-like additional element 29, is pressurized with compressed air. As a result, the retaining strip 25 and the support strip 23 are moved by a large stroke. The additional element 29 does not have to be subjected to compressed air for cleaning work.

Das zusätzliche Element 29 muss auch nicht schlauchartig ausgebildet sein, sondern kann auch ein länglicher Gummistreifen sein. Dieser längliche Gummistreifen ist elastisch verformbar und öffnet zum Wechseln des Rakelelements 22 mit seiner Rückstellkraft die Einspanneinrichtung 21, sobald im Schlauch 26 der darin herrschende Druck reduziert wird. The additional element 29 does not have to be formed like a tube, but can also be an elongated rubber strip. This elongated rubber strip is elastically deformable and opens to change the doctor element 22 with his Restoring force the clamping device 21, once in the tube 26 of the therein prevailing pressure is reduced.

Statt das zusätzliche Element 29 im Schlauch 28 zu platzieren, kann es auch neben dem Schlauch 28 entlanglaufend angeordnet sein. Somit können sich die Hübe des zusätzlichen Elementes 29 und des Schlauchs 28 addieren, sodass der Schlauch 28 kleiner dimensioniert werden kann, um die Rakelvorrichtung 20 zu Reinigungszwecken mit einem großen Hub zu öffnen.Instead of placing the additional element 29 in the tube 28, it may also be next to it be arranged along the hose 28. Thus, the strokes of the add additional element 29 and the hose 28, so that the hose 28th smaller can be dimensioned to the doctor device 20 to Cleaning purposes with a large stroke to open.

Die erfindungsgemäße Rakelvorrichtung wird für Einrichtungen zum Auftragen von flüssigen bis pastösen Medien auf eine laufende Oberfläche O eingesetzt. Diese Oberfläche O ist aus Übersichtlichkeitsgründen nur Figur 2 dargestellt und stellt bei direktem Auftrag des Auftragsmediums eine laufende Papier-, Karton- oder andere Faserstoffbahn dar. Bei indirektem Auftrag ist die Oberfläche O ein Übertragselement, beispielsweise eine Auftragswalze oder auch ein umlaufendes Band, wobei das Übertragselement dann das Auftragsmedium an die laufende Faserstoffbahn in einem sogenannten Nip überträgt.
Das gegen die Oberfläche O drückende Rakelelement 22 dient der Dosierung und/oder Vergleichmäßigung des aufgebrachten Mediums und kann so wie in der Figur 2 dargestellt ist, als Rakelklinge ausgebildet sein. Das Rakelelement 22 kann aber auch ein drehbarer gerillter oder glatter Rakelstab sein, der in einem Rakelbett aufgenommen ist, welches sich wiederum auf einem klingenartigen Fuß (ausgebildet in etwa wie die Rakelklinge von Figur 2) abstützt. The doctor device according to the invention is used for devices for applying liquid to pasty media on a running surface O. For reasons of clarity, this surface O is shown only in FIG. 2 and represents a running paper, board or other fibrous web when the application medium is directly applied. In the case of indirect application, the surface O is a transfer element, for example an applicator roll or a circulating belt Transfer element then transfers the application medium to the moving fibrous web in a so-called nip.
The squeegee element 22 which presses against the surface O serves for metering and / or equalizing the applied medium and, as shown in FIG. 2 , can be designed as a doctor blade. However, the doctor element 22 can also be a rotatable grooved or smooth doctor bar which is accommodated in a doctor bed, which in turn is supported on a blade-like foot (formed approximately in the same way as the doctor blade of FIG. 2).

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Rakelvorrichtungdoctor device
1111
Einspanneinrichtungchuck
1212
Stützleistesupporting strip
1313
Führungsleisteguide rail
1414
erster Schlauchfirst hose
1515
zweiter Schlauchsecond hose
1616
Halteleisteretaining strip
1717
KugelBullet
1818
Federfeather
1919
Ausnehmungrecess
19a19a
Rand der AusnehmungEdge of the recess
2020
Rakelvorrichtungdoctor device
2121
Einspanneinrichtungchuck
2222
Rakelelementdoctor element
2323
Stützleistesupporting strip
2424
Führungsleisteguide rail
2525
Halteleisteretaining strip
2626
erster Schlauchfirst hose
2727
Grundkörperbody
2828
zweiter Schlauchsecond hose
2929
zusätzliches Elementadditional element
Ee
Einspannstelleclamping
OO
Oberflächesurface

Claims (8)

Rakelvorrichtung für Einrichtungen zum Auftragen von flüssigen bis pastösen Medien auf eine laufende Oberfläche mit einem gegen die Oberfläche drückenden Rakelelement (22) zur Dosierung und/oder Vergleichmäßigung des aufgebrachten Mediums und mit einer das Rakelelement (22) haltenden Einspanneinrichtung (11, 21), einem ersten mit Druck beaufschlagbaren und damit einen Hub ausführenden Schlauch (14, 26) zum Schließen und einem zweiten mit Druck beaufschlagbaren und ebenfalls einen Hub ausführenden Schlauch (15, 28) zum Öffnen der Einspanneinrichtung (11, 21), dadurch gekennzeichnet, dass ein zusätzliches Element (29) zum Öffnen der Einspanneinrichtung (21) vorgesehen ist, das einen geringeren Hub aufweist als der zweite Schlauch (28).Squeegee device for devices for applying liquid to pasty media on a running surface with a pressing against the surface doctor element (22) for metering and / or equalization of the applied medium and with a squeegee element (22) holding the clamping device (11, 21) first pressurizable and thus a stroke exporting hose (14, 26) for closing and a second pressurizable and also a hub exporting hose (15, 28) for opening the clamping device (11, 21), characterized in that an additional Element (29) is provided for opening the clamping device (21) having a lower stroke than the second tube (28). Rakelvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das zusätzliche Element (29) elastisch verformbar ist.Doctor device according to claim 1, characterized in that the additional element (29) is elastically deformable. Rakelvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das zusätzliche Element (29) ebenfalls ein mit Druck beaufschlagbarer Schlauch ist.Doctor device according to claim 2, characterized in that the additional element (29) is also a pressurizable hose. Rakelvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das zusätzliche Element (29) ein länglicher Gummistreifen, insbesondere Moosgummistreifen ist. Doctor device according to claim 2, characterized in that the additional element (29) is an elongated rubber strip, in particular sponge rubber strip. Rakelvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das zusätzliche Element (29) innerhalb des zweiten, zum Öffnen der Einspanneinrichtung (21) vorgesehenen Schlauches (28) angeordnet ist.Doctor device according to one of claims 1 to 4, characterized in that the additional element (29) within the second, for opening the clamping device (21) provided hose (28) is arranged. Rakelvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das zusätzliche Element (29) und der zum Öffnen der Einspanneinrichtung (21) vorgesehene zweite Schlauch (28) nebeneinander entlanglaufend angeordnet sind.Doctor device according to one of claims 1 to 5, characterized in that the additional element (29) and the opening of the clamping device (21) provided for the second tube (28) are arranged side by side running along. Rakelvorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das zusätzliche Element (29) nachrüstbar ist.Doctor device according to one of claims 1 to 7, characterized in that the additional element (29) can be retrofitted. Streicheinrichtung, dadurch gekennzeichnet, dass sie für eine einseitige oder beidseitige direkte oder indirekte Beschichtung einer laufenden Papier-, Karton- oder anderen Faserstoffbahn mit einem flüssigen bis pastösen Medium vorgesehen ist und eine Rakelvorrichtung (20) nach einem der Ansprüche 1 bis 7 aufweist.Coating device, characterized in that it is provided for a one-sided or two-sided direct or indirect coating of a running paper, board or other fibrous web with a liquid to pasty medium and a doctor device (20) according to one of claims 1 to 7.
EP05102326A 2004-04-17 2005-03-23 Doctor blade Not-in-force EP1593440B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004018770A DE102004018770A1 (en) 2004-04-17 2004-04-17 Scraper blade pneumatic clamp for papermaking assembly incorporates secondary expansion hose
DE102004018770 2004-04-17

Publications (3)

Publication Number Publication Date
EP1593440A2 true EP1593440A2 (en) 2005-11-09
EP1593440A3 EP1593440A3 (en) 2010-12-22
EP1593440B1 EP1593440B1 (en) 2012-05-09

Family

ID=34939051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05102326A Not-in-force EP1593440B1 (en) 2004-04-17 2005-03-23 Doctor blade

Country Status (3)

Country Link
EP (1) EP1593440B1 (en)
AT (1) ATE556787T1 (en)
DE (1) DE102004018770A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1789628B2 (en) † 2004-08-21 2011-01-12 Voith Patent GmbH Doctor blade device
CN104582862A (en) * 2012-06-11 2015-04-29 Btgipi有限公司 Insert and holder for a metering device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103861768B (en) * 2014-03-29 2016-08-17 周午贤 A kind of self adaptation high degree type cage guide device for painting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8232839U1 (en) * 1982-11-23 1984-06-14 Jagenberg AG, 4000 Düsseldorf DEVICE FOR COATING CONTINUOUS MATERIALS
US4789432A (en) * 1987-06-08 1988-12-06 Thermo Electron Web Systems, Inc. Doctoring apparatus
FI91367C (en) * 1990-12-13 1994-06-27 Valmet Paper Machinery Inc Bending compensated blade beam
DE4334555C2 (en) * 1993-10-11 2003-06-26 Jagenberg Papiertech Gmbh Mount for a squeegee rod
DE4341341C1 (en) * 1993-12-06 1995-03-09 Jagenberg Ag Metering system for devices for coating material webs, in particular paper or board webs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1789628B2 (en) † 2004-08-21 2011-01-12 Voith Patent GmbH Doctor blade device
US8082875B2 (en) 2004-08-21 2011-12-27 Voith Patent Gmbh Doctor device
CN104582862A (en) * 2012-06-11 2015-04-29 Btgipi有限公司 Insert and holder for a metering device

Also Published As

Publication number Publication date
EP1593440B1 (en) 2012-05-09
EP1593440A3 (en) 2010-12-22
DE102004018770A1 (en) 2005-11-03
ATE556787T1 (en) 2012-05-15

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