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EP1728561B1 - Two-layer curtain coating apparatus - Google Patents

Two-layer curtain coating apparatus Download PDF

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Publication number
EP1728561B1
EP1728561B1 EP06111144A EP06111144A EP1728561B1 EP 1728561 B1 EP1728561 B1 EP 1728561B1 EP 06111144 A EP06111144 A EP 06111144A EP 06111144 A EP06111144 A EP 06111144A EP 1728561 B1 EP1728561 B1 EP 1728561B1
Authority
EP
European Patent Office
Prior art keywords
curtain
coating
nozzle
layer
curtain nozzle
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.)
Not-in-force
Application number
EP06111144A
Other languages
German (de)
French (fr)
Other versions
EP1728561A1 (en
Inventor
Hirofumi Morita
Akio Hirano
Hiroyuki Kohno
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
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 filed Critical Voith Patent GmbH
Publication of EP1728561A1 publication Critical patent/EP1728561A1/en
Application granted granted Critical
Publication of EP1728561B1 publication Critical patent/EP1728561B1/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
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • 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
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/06—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying two different liquids or other fluent materials, or the same liquid or other fluent material twice, to the same side of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
    • B05D1/305—Curtain coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/34—Applying different liquids or other fluent materials simultaneously
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed

Definitions

  • the present invention relates to a two-layer curtain coater which provides a surface of a running paper, board or other fibrous web with a first coating composition consisting of a first coating slurry and a second coating composition consisting of a second coating slurry curtain two-coat coating slurry curtain and the first coating composition and applying the second coating slip in two superimposed layers to the surface of the fibrous web.
  • a coating machine which on the surface of a paper web (base paper) a first coating composition and a second coating material, which have different properties, in two layers crossed one another, for the production of heat-sensitive paper, in which on the surface of a paper web (base paper), a heat-sensitive coating as a color developer layer and a resin coating as a protective layer are coated, and for the production of art paper or coated paper, in which on the surface of a paper web (base paper) a coating for primer and a coating on the equipment are deleted, for example, in Fig. 4 shown conventional two-layer curtain coater A has been proposed.
  • a twin curtain nozzle N is provided above a transported paper web W.
  • a first coating slip C1 supplied from a first nozzle head Nh1 of the curtain nozzle N a first coating compound curtain C1c is formed, and one of a second nozzle head Nh2 is formed
  • a second coating mass curtain C2c is formed.
  • a surface Ws of the paper web W, which, as in Fig. 4 (b) is transported in the direction of the arrow X is provided with a two-layer coating curtain F, which is formed jointly by the first coating mass curtain C1 c and the second coating mass curtain C2c.
  • a first coating material layer C1I and a second coating material layer C2I are formed in two layers one above the other by brushing.
  • the coating material when the operation is to be started from a standstill and coating begins to flow in the nozzle, the coating material must be able to flow until stabilization of the coating mass flow, a coating mass curtain is formed in the stationary state. Before the start of the painting you have to let the coating slip out of the nozzle.
  • the two-layer coating curtain F supplied from the curtain nozzle N consists of a first coating slurry curtain C1c and a second coating slurry curtain C2c, there is a significant disadvantage that the first coating composition C1 and the second coating composition C2 can not be collected separately from each other.
  • the conventional two-layer curtain coating machine A since the first coating slip C1 and the second coating slip C2, which have been flown out of the curtain nozzle N during the coating preparation, are intermingled upon collection and reuse is difficult, the conventional two-layer curtain coating machine A has the disadvantage that during the course of the prior art Prepare a lot of first coat of paint C1 and second slip C2 to be consumed.
  • a multi-layer applicator is disclosed. With such a multi-layer application device, both individual curtains and those individual curtains are deliverable, which can be combined to form a multiple curtain, so that a multiple layer is formed on the moving surface.
  • the preparation phase collecting devices are provided, with each of which separately from each other, the respective application medium can be collected.
  • the EP A1-1 544 353 and the DE A1- 199 03 559 each show devices for curtain coating, with each of which a single layer can be applied.
  • the curtain dispensing nozzles are each assigned a collecting device for collecting the dispensed individual curtain.
  • Object of the present invention is to provide a two-layer curtain coater available, taking into account the aforementioned circumstances, which can avoid a coating mass loss in the coating preparation.
  • the object is achieved in that the two-layer curtain coater has a first curtain nozzle forming the first coating curtain and a second curtain nozzle forming the second coating curtain, and the first curtain nozzle and the second curtain nozzle are in a coating preparation position (standby position) where they are remote from each other, and a carding execution position (operating position) in which they are connected to each other and freely movable, wherein in the coating preparation position, the first coating slip and the second coating slip are collected separately by a first collecting tray for the first coating curtain from the first curtain nozzle and a second collecting tray is present for the second coating mass curtain from the second curtain nozzle and in the coating execution position, the two-layer coating mass curtain consisting of the first and the second coating mass curtain forms and deposits in two layers one above the other on the surface of the paper web.
  • the first coating slurry curtain from the first curtain nozzle is caught by the first collection tray, the second coating slurry curtain from the second one Curtain nozzle is collected with the second sump and thereby the first coating slip and the second coating slip unmixed and collected separately, the collected first coating slip and the collected second coating slip can be reused unchanged, so that a coating mass loss can be avoided in the coating preparation.
  • FIGS. 1 to 3 show an embodiment of the two-layer curtain coater according to the invention.
  • This two-layer curtain coating machine 1 has a pair of nozzles consisting of a first curtain nozzle 10 and a second curtain nozzle 20, which is arranged above a moving paper web (base paper) W.
  • the first curtain nozzle 10 and the second curtain nozzle 20 are provided in common along the transport direction of the paper web W indicated by an arrow X.
  • the first curtain nozzle 10 is a device that forms a first coating compound curtain C1c from the first coating slip C1 supplied from the nozzle head 10h, and is fixedly mounted in a fixed position over the paper web W.
  • the second curtain nozzle 20 is a device that forms a second coating slurry C2c from the second coating material C2 supplied from the nozzle head 20h, and is downstream of the first curtain nozzle 10 in the direction of transport of the paper web W.
  • the second curtain nozzle 20 is so freely movably supported by guide means 3, which consist of a guide track 3G and a slider 3S, on a carrier 2 which extends over the transporting direction of the paper web W so as to move toward the first curtain nozzle 10 this moved away.
  • guide means 3 consist of a guide track 3G and a slider 3S, on a carrier 2 which extends over the transporting direction of the paper web W so as to move toward the first curtain nozzle 10 this moved away.
  • the second curtain nozzle 20 is due to the operation of a provided between the second curtain nozzle 20 and the carrier 2 cylinder drive member 4 between the in Fig. 1 shown in prank preparation position, in which the second curtain nozzle 20 is removed from the first curtain nozzle 10, and the in Fig. 3 shown, in which the second curtain nozzle 20 is connected to the first curtain nozzle 10 moves.
  • the position of the fixed first curtain nozzle 10 is the coating preparation position
  • the position of the fixed first curtain nozzle 10 is the carding execution position
  • first curtain nozzle 10 and the second curtain nozzle 20 in the in Fig. 1 are shown below the first curtain nozzle 10, a first drip pan 11, and below the second curtain nozzle 20 is a second drip tray 21st
  • the first sump 11 is connected to the first curtain nozzle 10 (nozzle head 10h) via a pipe 13 provided between the first sump 11 and a pump 12, and the second sump 21 is connected via a pipe 23 between the second Drip pan 21 and a pump 22 is provided, with the second curtain nozzle 20 (nozzle head 20h) connected.
  • the first drip pan 11 and the second drip pan 21 are designed such that they can be moved between a working position (FIG. Fig. 1 ) directly below the first curtain nozzle 10 and the second curtain nozzle 20 located in the coating preparation position and one in the Figures 2 and 3 shown retreat position, that is, a position that is away from the position directly below located in the prank preparation position and Ausreichauspositionposition first curtain nozzle 10 and second curtain nozzle 20 can be moved with not shown guide means and drive means.
  • the two-layer curtain coater 1 configured as described above, as shown in FIG Fig. 1 in the course of the coating preparation, the first curtain nozzle 10 and the second curtain nozzle 20 are in the coating preparation position in which they are apart from each other and at the same time brings the first sump 11 and the second sump 21 to the working position directly below the first curtain nozzle 10 and the second curtain nozzle 20th
  • the first coating mass curtain C1c formed with a first coating slip C1 supplied from a nozzle head 10h
  • the second coating slurry curtain C2c flowing with a second coating slip C2c flows which is supplied from the nozzle head 20h.
  • the first coating mass curtain C1c flowing from the first curtain nozzle 10 is caught by the first collecting tray 11, and the first coating paste C1 collected in the first collecting tray 11 is passed through the operation of the pump 12 is returned via the tube 13 in the nozzle head 10h of the first curtain nozzle 10.
  • the second coating mass curtain C2c flowing from the second curtain nozzle 20 is collected with the second collecting tray 21, and the second coating paste C2 collected in the second collecting tray 21 is returned to the nozzle head 20h of the second curtain nozzle 20 via the pipe 23 through the operation of the pump 22.
  • the first coating slip C1 flowing out of the first curtain nozzle 10 and the second coating slip C2 flowing out of the second curtain nozzle 20 are caught by being separated from each other by the first collection tray 11 and the second collection tray 21, and between the first Curtain nozzle 10 and the first drip pan 11 and between the second curtain nozzle 20 and the second drip tray 21 are circulated, as indicated in each case by the arrows a, b and c, effectively reused.
  • the two-layer curtain coater 1 starts the coating, first, as in FIG Fig. 2 shown, the first drip pan 11 and the second drip tray 21 from the working position ( Fig. 1 ) are brought into the retracted position, and then, as in Fig. 3 1, the first curtain nozzle 10 and the second curtain nozzle 20 from the coating preparation position (FIG. Fig. 1 ) placed in the prank execution position.
  • the first coating material layer C1l is first formed by brushing, and then by applying the material from the first coating material C2c second curtain nozzle 20 flowing second coating slurry curtain C2c on the first coat layer C1l the first coating slip C1 and the second coating slip C2 in two layers one above the other on the surface Ws of the paper web W deleted.
  • the first curtain nozzle 10 and the second curtain nozzle 20 are brought into the coating preparation position where they are apart from each other, the first coating compound curtain C1c is collected from the first curtain nozzle 10 with the first drip pan 11, the second coating mass curtain C2c from the second curtain nozzle 20 is collected with the second drip tray 21 and the first coating composition C1 and the second coating C2 are collected unmixed and separated from each other, the collected first Coating C1 and the collected second coating C2 are reused unchanged, so that a coating mass loss in the coating preparation can be avoided.
  • the first curtain nozzle 10 is fixedly mounted and the second curtain nozzle 20 is freely movable but when the first curtain nozzle 10 and the second curtain nozzle 20 are between the coating preparation position where they are apart from each other. and the carding execution position in which they are connected to each other should be moved freely to each other, can also be moved so that the second curtain nozzle 20 is fixed and the first curtain nozzle 10 is free to move or the first curtain nozzle 10 and the second curtain nozzle 20 free are mobile.
  • the cylinder driving member 4 is used, but as a means moving the first curtain nozzle 10 and the second curtain nozzle 20 to each other, of course, various drive means other than the cylinder may be used Drive element, for example, a ball screw mechanism can be used.

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  • Paper (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Materials For Medical Uses (AREA)

Abstract

The coating machine (1) which coats the surfaces with different coating mass has a first nozzle (10) producing the first mass curtain (C1c) and a second nozzle (20) producing the second mass curtain (C2c). The two nozzles move freely between a standby position where they are spaced from one another into a coating position where they are connected to one another. In the standby position the masses can be collected up separately through the two receptacles (11,21) whilst in the coating position the two masses are formed as a double layer curtain deposited one above the other onto the surface of the paper web (Ws).

Description

Die vorliegende Erfindung betrifft eine Zweischicht-Vorhangstreichmaschine, die eine Oberfläche einer laufenden Papier-, Karton- oder anderen Faserstoffbahn mit einem aus einer ersten Streichmasse bestehenden ersten Streichmassenvorhang und einem aus einer zweiten Streichmasse bestehenden zweiten Streichmassenvorhang bestehenden Zweischicht-Streichmassenvorhang versieht und die die erste Streichmasse und die zweite Streichmasse in zwei übereinander gelegten Schichten auf die Oberfläche der Faserstoffbahn aufbringt.The present invention relates to a two-layer curtain coater which provides a surface of a running paper, board or other fibrous web with a first coating composition consisting of a first coating slurry and a second coating composition consisting of a second coating slurry curtain two-coat coating slurry curtain and the first coating composition and applying the second coating slip in two superimposed layers to the surface of the fibrous web.

Als Streichmaschine, die auf die Oberfläche einer Papierbahn (Rohpapier) eine erste Streichmasse und eine zweite Streichmasse, die unterschiedliche Eigenschaften haben, in zwei Schichten übereinander streicht, zur Herstellung von wärmeempfindlichem Papier, bei dem auf die Oberfläche einer Papierbahn (Rohpapier) eine wärmeempfindliche Streichmasse als Farbentwicklerschicht und eine Harzstreichmasse als Schutzschicht gestrichen sind, und zur Herstellung von Kunstdruckpapier oder gestrichenem Papier, bei dem auf die Oberfläche einer Papierbahn (Rohpapier) eine Streichmasse zur Grundierung und eine Streichmasse zur Ausrüstung gestrichen sind, ist beispielsweise die in Fig. 4 gezeigte herkömmliche Zweischicht-Vorhangstreichmaschine A vorgeschlagen worden.As a coating machine, which on the surface of a paper web (base paper) a first coating composition and a second coating material, which have different properties, in two layers crossed one another, for the production of heat-sensitive paper, in which on the surface of a paper web (base paper), a heat-sensitive coating as a color developer layer and a resin coating as a protective layer are coated, and for the production of art paper or coated paper, in which on the surface of a paper web (base paper) a coating for primer and a coating on the equipment are deleted, for example, in Fig. 4 shown conventional two-layer curtain coater A has been proposed.

Bei dieser Zweischicht-Vorhangstreichmaschine A ist über einer transportierten Papierbahn W eine Zwillings-Vorhangdüse N vorgesehen. Mit einer von einem ersten Düsenkopf Nh1 der Vorhangdüse N zugeführten ersten Streichmasse C1 wird ein erster Streichmassenvorhang C1c ausgebildet, und mit einer von einem zweiten Düsenkopf Nh2 der Vorhangdüse N zugeführten zweiten Streichmasse C2 wird ein zweiter Streichmassenvorhang C2c ausgebildet. Eine Oberfläche Ws der Papierbahn W, die, wie in Fig. 4(b) gezeigt, in Richtung des Pfeils X transportiert wird, wird mit einem Zweischicht-Streichmassenvorhang F versehen, der gemeinsam von dem ersten Streichmassenvorhang C1 c und dem zweiten Streichmassenvorhang C2c gebildet wird. Dadurch werden auf der Oberfläche Ws der Papierbahn W eine erste Streichmassenschicht C1I und eine zweite Streichmassenschicht C2I in zwei Schichten übereinander durch Streichen ausgebildet.In this two-layer curtain coater A, a twin curtain nozzle N is provided above a transported paper web W. With a first coating slip C1 supplied from a first nozzle head Nh1 of the curtain nozzle N, a first coating compound curtain C1c is formed, and one of a second nozzle head Nh2 is formed Curtain nozzle N supplied second coating slip C2, a second coating mass curtain C2c is formed. A surface Ws of the paper web W, which, as in Fig. 4 (b) is transported in the direction of the arrow X is provided with a two-layer coating curtain F, which is formed jointly by the first coating mass curtain C1 c and the second coating mass curtain C2c. As a result, on the surface Ws of the paper web W, a first coating material layer C1I and a second coating material layer C2I are formed in two layers one above the other by brushing.

Da die dem Anmelder bekannte, vorstehend beschriebene herkömmliche Technik keine Technik ist, die in Büchern o. Ä. offengelegt ist, und keinen Bezug zu aus der Literatur bekannten Erfindungen hat, gibt es keine anzugebenden Quellendaten zu dieser herkömmlichen Technik.Since the conventional technique known to the Applicant, described above, is not a technique described in books or the like. and has no relation to inventions known from the literature, there is no source data to be given on this conventional technique.

Um jedoch bei der herkömmlichen Vorhangstreichmaschine eine Verschmutzung der Düse durch Streichmasse zu vermeiden, muss normalerweise die Streichmasse aus der Düse fließen gelassen werden. Um zu verhindern, dass bei einem Stillstand der Streichmasse Luft in die Düse eindringt und ein Teil der Streichmasse trocknet, muss man während des Streichens sowieso und auch während der Streichvorbereitung normalerweise die Streichmasse aus der Düse fließen und einen Streichmassenvorhang sich bilden lassen.However, in order to avoid contamination of the nozzle by coating compound in the conventional curtain coater, it is normally necessary to allow the coating to flow out of the nozzle. In order to prevent air from entering the nozzle at a standstill of the coating composition and drying a portion of the coating composition, it is normally necessary during the coating to pass the coating material out of the nozzle and also during the coating preparation to form a coating slip curtain.

Weiterhin muss bei der herkömmlichen Vorhangstreichmaschine, wenn der Betrieb aus dem Stillstand gestartet werden soll und Streichmasse in der Düse zu fließen beginnt, die Streichmasse so lange fliessen können, bis durch Stabilisierung des Streichmassenstroms sich ein Streichmassenvorhang im stationären Zustand ausbildet. Vor dem Beginn des Streichens muss man Streichmasse aus der Düse fließen lassen.Furthermore, in the conventional curtain coater, when the operation is to be started from a standstill and coating begins to flow in the nozzle, the coating material must be able to flow until stabilization of the coating mass flow, a coating mass curtain is formed in the stationary state. Before the start of the painting you have to let the coating slip out of the nozzle.

Daher wird bei der vorgenannten Zweischicht-Vorhangstreichmaschine A, wie in Fig. 4(a) gezeigt, der Zweischicht-Streichmassenvorhang F, der bei der Streichvorbereitung von der Vorhangdüse N zugeführt wird, von einer in Fig. 4(b) gezeigten Auffangwanne P aufgefangen, die aus einer Rückzugsposition unter die Vorhangdüse N geschoben worden ist.Therefore, in the aforementioned two-layer curtain coater A, as in FIG Fig. 4 (a) shown, the two-layer coating curtain F, which is supplied in the coating preparation of the curtain nozzle N, of an in Fig. 4 (b) collected catch pan P, which has been pushed from a retreat position under the curtain N nozzle.

Da jedoch der von der Vorhangdüse N zugeführte Zweischicht-Streichmassenvorhang F aus einem ersten Streichmassenvorhang C1c und einem zweiten Streichmassenvorhang C2c besteht, liegt der erhebliche Nachteil vor, dass die erste Streichmasse C1 und die zweite Streichmasse C2 nicht voneinander getrennt aufgefangen werden können.However, since the two-layer coating curtain F supplied from the curtain nozzle N consists of a first coating slurry curtain C1c and a second coating slurry curtain C2c, there is a significant disadvantage that the first coating composition C1 and the second coating composition C2 can not be collected separately from each other.

Da somit die erste Streichmasse C1 und die zweite Streichmasse C2, die während der Streichvorbereitung aus der Vorhangdüse N fließen gelassen worden sind, beim Auffangen miteinander vermischt sind und eine Wiederverwendung schwierig ist, besteht bei der herkömmlichen Zweischicht-Vorhangstreichmaschine A der Nachteil, dass während der Streichvorbereitung sehr viel erste Streichmasse C1 und zweite Streichmasse C2 verbraucht werden.Thus, since the first coating slip C1 and the second coating slip C2, which have been flown out of the curtain nozzle N during the coating preparation, are intermingled upon collection and reuse is difficult, the conventional two-layer curtain coating machine A has the disadvantage that during the course of the prior art Prepare a lot of first coat of paint C1 and second slip C2 to be consumed.

Zum Stand der Technik wird noch auf die EP A2-1 475 162 hingewiesen. In dieser Druckschrift ist eine Mehrschicht-Auftragsvorrichtung offenbart. Mit einer solchen Mehrschicht-Auftragsvorrichtung, sind sowohl Einzelvorhänge als auch solche Einzelvorhänge abgebbar, die sich zu einem Mehrfachvorhang zusammenführen lassen, so dass eine Mehrfachschicht auf dem sich bewegenden Untergrund entsteht. Die vorgesehenen, in Bewegungsrichtung des Untergrundes nebeneinander liegenden Abgabedüsen verbleiben während der Vorbereitungsphase und auch in Streichausführungsphase in der eingestellten Position. In der Vorbereitungsphase sind Auffangeinrichtungen vorgesehen, mit denen jeweils getrennt voneinander das jeweilige Auftragsmedium, aufgefangen werden kann.The state of the art is still on the EP A2-1 475 162 pointed. In this document, a multi-layer applicator is disclosed. With such a multi-layer application device, both individual curtains and those individual curtains are deliverable, which can be combined to form a multiple curtain, so that a multiple layer is formed on the moving surface. The provided, in the direction of movement of the substrate adjacent discharge nozzles remain during the preparation phase and in the string execution phase in the set position. In the preparation phase collecting devices are provided, with each of which separately from each other, the respective application medium can be collected.

Die EP A1- 1 544 353 und die DE A1- 199 03 559 zeigen jeweils Vorrichtungen zur Vorhangbeschichtung, mit denen jeweils eine Einfachschicht aufbringbar ist.
Den Vorhang-Abgabedüsen ist jeweils eine Auffangeinrichtung zum Auffangen des abgegebenen Einzelvorhangs zugeordnet.The EP A1-1 544 353 and the DE A1- 199 03 559 each show devices for curtain coating, with each of which a single layer can be applied.
The curtain dispensing nozzles are each assigned a collecting device for collecting the dispensed individual curtain.

Aufgabe der vorliegenden Erfindung ist es, unter Berücksichtigung der vorgenannten Gegebenheiten eine Zweischicht-Vorhangstreichmaschine zur Verfügung zu stellen, die einen Streichmassenverlust bei der Streichvorbereitung vermeiden kann.Object of the present invention is to provide a two-layer curtain coater available, taking into account the aforementioned circumstances, which can avoid a coating mass loss in the coating preparation.

Erfindungsgemäss wird die Aufgabe dadurch gelöst, dass die Zweischicht-Vorhangstreichmaschine eine den ersten Streichmassenvorhang ausbildende erste Vorhangdüse und eine den zweiten Streichmassenvorhang ausbildende zweite Vorhangdüse aufweist und die erste Vorhangdüse und die zweite Vorhangdüse in eine Streichvorbereitungsposition (Bereitschaftsposition), in der sie voneinander entfernt sind, und eine Streichausführungsposition (Betriebsposition), in der sie miteinander verbunden sind und frei bewegbar sind, wobei in der Streichvorbereitungsposition die erste Streichmasse und die zweite Streichmasse voneinander getrennt auffangbar sind, indem eine erste Auffangwanne für den ersten Streichmassenvorhang aus der ersten Vorhangdüse und eine zweite Auffangwanne für den zweiten Streichmassenvorhang aus der zweiten Vorhangdüse vorhanden ist und in der Streichausführungsposition sich der Zweischicht-Streichmassenvorhang bestehend aus dem ersten und dem zweiten Streichmassenvorhang ausbildet und in zwei Schichten übereinander auf die Oberfläche der Papierbahn ablegt.According to the invention, the object is achieved in that the two-layer curtain coater has a first curtain nozzle forming the first coating curtain and a second curtain nozzle forming the second coating curtain, and the first curtain nozzle and the second curtain nozzle are in a coating preparation position (standby position) where they are remote from each other, and a carding execution position (operating position) in which they are connected to each other and freely movable, wherein in the coating preparation position, the first coating slip and the second coating slip are collected separately by a first collecting tray for the first coating curtain from the first curtain nozzle and a second collecting tray is present for the second coating mass curtain from the second curtain nozzle and in the coating execution position, the two-layer coating mass curtain consisting of the first and the second coating mass curtain forms and deposits in two layers one above the other on the surface of the paper web.

Da bei der erfindungsgemäßen Zweischicht-Vorhangstreichmaschine während der Streichvorbereitung die erste Vorhangdüse und die zweite Vorhangdüse in eine Streichvorbereitungsposition gebracht werden, in der sie voneinander entfernt sind, der erste Streichmassenvorhang aus der ersten Vorhangdüse mit der ersten Auffangwanne aufgefangen wird, der zweite Streichmassenvorhang aus der zweiten Vorhangdüse mit der zweiten Auffangwanne aufgefangen wird und dadurch die erste Streichmasse und die zweite Streichmasse unvermischt und voneinander getrennt aufgefangen werden, können die aufgefangene erste Streichmasse und die aufgefangene zweite Streichmasse unverändert wiederverwendet werden, sodass ein Streichmassenverlust bei der Streichvorbereitung vermieden werden kann.In the two-layer curtain coating machine according to the invention, during the coating preparation, since the first curtain nozzle and the second curtain nozzle are brought into a coating preparation position where they are apart from each other, the first coating slurry curtain from the first curtain nozzle is caught by the first collection tray, the second coating slurry curtain from the second one Curtain nozzle is collected with the second sump and thereby the first coating slip and the second coating slip unmixed and collected separately, the collected first coating slip and the collected second coating slip can be reused unchanged, so that a coating mass loss can be avoided in the coating preparation.

Nachstehend wird die vorliegende Erfindung anhand von Zeichnungen, die eine Ausführungsform zeigen, näher beschrieben.Hereinafter, the present invention will be described in detail with reference to drawings showing an embodiment.

Es zeigen:

Fig. 1:
eine schematische Darstellung, die eine Ausführungsform der erfindungsgemäßen Zweischicht-Vorhangstreichmaschine zeigt.
Fig. 2:
eine schematische Darstellung, die die Funktionsweise der in Fig. 1 gezeigten Zweischicht-Vorhangstreichmaschine zeigt.
Fig. 3:
eine schematische Darstellung, die die Funktionsweise der in Fig. 1 gezeigten Zweischicht-Vorhangstreichmaschine zeigt.
Figuren 4(a) und (b):
schematische Darstellungen, die eine herkömmliche Zweischicht-Vorhangstreichmaschine zeigen.
Show it:
Fig. 1 :
a schematic representation showing an embodiment of the two-layer curtain coater according to the invention.
Fig. 2 :
a schematic representation of the functioning of in Fig. 1 shown two-layer curtain coater shows.
3 :
a schematic representation of the functioning of in Fig. 1 shown two-layer curtain coater shows.
FIGS. 4 (a) and (b) :
schematic diagrams showing a conventional two-layer curtain coater.

Die Figuren 1 bis 3 zeigen eine Ausführungsform der erfindungsgemäßen Zweischicht-Vorhangstreichmaschine. Diese Zweischicht-Vorhangstreichmaschine 1 weist ein aus einer ersten Vorhangdüse 10 und einer zweiten Vorhangdüse 20 bestehendes Düsenpaar auf, das über einer laufenden Papierbahn (Rohpapier) W angeordnet ist.The FIGS. 1 to 3 show an embodiment of the two-layer curtain coater according to the invention. This two-layer curtain coating machine 1 has a pair of nozzles consisting of a first curtain nozzle 10 and a second curtain nozzle 20, which is arranged above a moving paper web (base paper) W.

Die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 sind gemeinsam entlang der mit einem Pfeil X gekennzeichneten Transportrichtung der Papierbahn W vorgesehen. Die erste Vorhangdüse 10 ist eine Vorrichtung, die aus der von dem Düsenkopf 10h zugeführten ersten Streichmasse C1 einen ersten Streichmassenvorhang C1c formt, und sie ist in einer festgelegten Position über der Papierbahn W fest angebracht.The first curtain nozzle 10 and the second curtain nozzle 20 are provided in common along the transport direction of the paper web W indicated by an arrow X. The first curtain nozzle 10 is a device that forms a first coating compound curtain C1c from the first coating slip C1 supplied from the nozzle head 10h, and is fixedly mounted in a fixed position over the paper web W.

Die zweite Vorhangdüse 20 ist eine Vorrichtung, die aus der von dem Düsenkopf 20h zugeführten zweiten Streichmasse C2 einen zweiten Streichmassenvorhang C2c formt, und sie ist der ersten Vorhangdüse 10 in Transportrichtung der Papierbahn W nachgelagert.The second curtain nozzle 20 is a device that forms a second coating slurry C2c from the second coating material C2 supplied from the nozzle head 20h, and is downstream of the first curtain nozzle 10 in the direction of transport of the paper web W.

Die zweite Vorhangdüse 20 wird an einem Träger 2, der über der Transportrichtung der Papierbahn W verläuft, durch Führungsmittel 3, die aus einer Führungsbahn 3G und einem Gleitstück 3S bestehen, so frei beweglich gehalten, dass sie sich zu der ersten Vorhangdüse 10 hin und von dieser weg bewegt.The second curtain nozzle 20 is so freely movably supported by guide means 3, which consist of a guide track 3G and a slider 3S, on a carrier 2 which extends over the transporting direction of the paper web W so as to move toward the first curtain nozzle 10 this moved away.

Die zweite Vorhangdüse 20 wird aufgrund der Betätigung eines zwischen der zweiten Vorhangdüse 20 und dem Träger 2 vorgesehenen Zylinder-Antriebselements 4 zwischen der in Fig. 1 gezeigten Streichvorbereitungsposition, in der die zweite Vorhangdüse 20 von der ersten Vorhangdüse 10 entfernt ist, und der in Fig. 3 gezeigten Streichausführungsposition, in der die zweite Vorhangdüse 20 mit der ersten Vorhangdüse 10 verbunden ist, bewegt.The second curtain nozzle 20 is due to the operation of a provided between the second curtain nozzle 20 and the carrier 2 cylinder drive member 4 between the in Fig. 1 shown in prank preparation position, in which the second curtain nozzle 20 is removed from the first curtain nozzle 10, and the in Fig. 3 shown, in which the second curtain nozzle 20 is connected to the first curtain nozzle 10 moves.

Wenn nun die im Beispiel fest angebrachte erste Vorhangdüse 10 beim Bewegen der zweiten Vorhangdüse 20 relativ zur zweiten Vorhangdüse 20 bewegt wird und die zweite Vorhangdüse 20 in der Streichvorbereitungsposition ist, ist die Position der feststehenden ersten Vorhangdüse 10 die Streichvorbereitungsposition, und wenn die zweite Vorhangdüse 20 in der Streichausführungsposition ist, ist die Position der feststehenden ersten Vorhangdüse 10 die Streichausführungsposition.Now, when the first curtain nozzle 10 fixed in the example is moved relative to the second curtain nozzle 20 when the second curtain nozzle 20 is moved and the second curtain nozzle 20 is in the coating preparation position, the position of the fixed first curtain nozzle 10 is the coating preparation position, and if the second curtain nozzle 20 is in the carding execution position, the position of the fixed first curtain nozzle 10 is the carding execution position.

Wenn die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 in der in Fig. 1 gezeigten Streichvorbereitungsposition sind, in der sie voneinander entfernt sind, befindet sich unter der ersten Vorhangdüse 10 eine erste Auffangwanne 11, und unter der zweiten Vorhangdüse 20 befindet sich eine zweite Auffangwanne 21.When the first curtain nozzle 10 and the second curtain nozzle 20 in the in Fig. 1 are shown below the first curtain nozzle 10, a first drip pan 11, and below the second curtain nozzle 20 is a second drip tray 21st

Die erste Auffangwanne 11 ist über ein Rohr 13, das zwischen der ersten Auffangwanne 11 und einer Pumpe 12 vorgesehen ist, mit der ersten Vorhangdüse 10 (Düsenkopf 10h) verbunden, und die zweite Auffangwanne 21 ist über ein Rohr 23, das zwischen der zweiten Auffangwanne 21 und einer Pumpe 22 vorgesehen ist, mit der zweiten Vorhangdüse 20 (Düsenkopf 20h) verbunden.The first sump 11 is connected to the first curtain nozzle 10 (nozzle head 10h) via a pipe 13 provided between the first sump 11 and a pump 12, and the second sump 21 is connected via a pipe 23 between the second Drip pan 21 and a pump 22 is provided, with the second curtain nozzle 20 (nozzle head 20h) connected.

Die erste Auffangwanne 11 und die zweite Auffangwanne 21 sind so gestaltet, dass sie zwischen einer Arbeitsposition (Fig. 1) direkt unter der sich in der Streichvorbereitungsposition befindenden ersten Vorhangdüse 10 und zweiten Vorhangdüse 20 und einer in den Figuren 2 und 3 gezeigten Rückzugsposition, also einer Position, die von der Position direkt unter der sich in der Streichvorbereitungsposition und Streichausführungsposition befindenden ersten Vorhangdüse 10 und zweiten Vorhangdüse 20 entfernt ist, mit nicht dargestellten Führungsmitteln und Antriebsmitteln bewegt werden können.The first drip pan 11 and the second drip pan 21 are designed such that they can be moved between a working position (FIG. Fig. 1 ) directly below the first curtain nozzle 10 and the second curtain nozzle 20 located in the coating preparation position and one in the Figures 2 and 3 shown retreat position, that is, a position that is away from the position directly below located in the prank preparation position and Ausreichauspositionposition first curtain nozzle 10 and second curtain nozzle 20 can be moved with not shown guide means and drive means.

Die wie vorstehend gestaltete Zweischicht-Vorhangstreichmaschine 1 bringt, wie in Fig. 1 gezeigt, während der Streichvorbereitung die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 in die Streichvorbereitungsposition, in der sie voneinander entfernt sind, und bringt gleichzeitig die erste Auffangwanne 11 und die zweite Auffangwanne 21 in die Arbeitsposition direkt unter der ersten Vorhangdüse 10 und der zweiten Vorhangdüse 20.The two-layer curtain coater 1 configured as described above, as shown in FIG Fig. 1 in the course of the coating preparation, the first curtain nozzle 10 and the second curtain nozzle 20 are in the coating preparation position in which they are apart from each other and at the same time brings the first sump 11 and the second sump 21 to the working position directly below the first curtain nozzle 10 and the second curtain nozzle 20th

Während der Streichvorbereitung fließt aus der ersten Vorhangdüse 10 der erste Streichmassenvorhang C1c, der mit einer ersten Streichmasse C1 ausgebildet wird, die von einem Düsenkopf 10h zugeführt wird, und aus der zweiten Vorhangdüse 20 fließt der zweite Streichmassenvorhang C2c, der mit einer zweiten Streichmasse C2 ausgebildet wird, die von dem Düsenkopf 20h zugeführt wird.During the coating preparation, from the first curtain nozzle 10 flows the first coating mass curtain C1c formed with a first coating slip C1 supplied from a nozzle head 10h, and from the second curtain nozzle 20 the second coating slurry curtain C2c flowing with a second coating slip C2c flows which is supplied from the nozzle head 20h.

Der aus der ersten Vorhangdüse 10 fließende erste Streichmassenvorhang C1c wird mit der ersten Auffangwanne 11 aufgefangen, und die in der ersten Auffangwanne 11 gesammelte erste Streichmasse C1 wird durch den Betrieb der Pumpe 12 über das Rohr 13 in den Düsenkopf 10h der ersten Vorhangdüse 10 zurückgeführt.The first coating mass curtain C1c flowing from the first curtain nozzle 10 is caught by the first collecting tray 11, and the first coating paste C1 collected in the first collecting tray 11 is passed through the operation of the pump 12 is returned via the tube 13 in the nozzle head 10h of the first curtain nozzle 10.

Der aus der zweiten Vorhangdüse 20 fließende zweite Streichmassenvorhang C2c wird mit der zweiten Auffangwanne 21 aufgefangen, und die in der zweiten Auffangwanne 21 gesammelte zweite Streichmasse C2 wird durch den Betrieb der Pumpe 22 über das Rohr 23 in den Düsenkopf 20h der zweiten Vorhangdüse 20 zurückgeführt.The second coating mass curtain C2c flowing from the second curtain nozzle 20 is collected with the second collecting tray 21, and the second coating paste C2 collected in the second collecting tray 21 is returned to the nozzle head 20h of the second curtain nozzle 20 via the pipe 23 through the operation of the pump 22.

Auf diese Weise werden während der Streichvorbereitung die aus der ersten Vorhangdüse 10 fließende erste Streichmasse C1 und die aus der zweiten Vorhangdüse 20 fließende zweite Streichmasse C2 dadurch, dass sie von der ersten Auffangwanne 11 und der zweiten Auffangwanne 21 voneinander getrennt aufgefangen werden und zwischen der ersten Vorhangdüse 10 und der ersten Auffangwanne 11 bzw. zwischen der zweiten Vorhangdüse 20 und der zweiten Auffangwanne 21 im Kreislauf geführt werden, wie jeweils mit den Pfeilen a, b und c angegeben, effektiv wiederverwendet.In this way, during the coating preparation, the first coating slip C1 flowing out of the first curtain nozzle 10 and the second coating slip C2 flowing out of the second curtain nozzle 20 are caught by being separated from each other by the first collection tray 11 and the second collection tray 21, and between the first Curtain nozzle 10 and the first drip pan 11 and between the second curtain nozzle 20 and the second drip tray 21 are circulated, as indicated in each case by the arrows a, b and c, effectively reused.

Wenn die Zweischicht-Vorhangstreichmaschine 1 mit der Streichausführung beginnt, werden zunächst, wie in Fig. 2 gezeigt, die erste Auffangwanne 11 und die zweite Auffangwanne 21 aus der Arbeitsposition (Fig. 1) in die Rückzugsposition gebracht, und anschließend werden, wie in Fig. 3 gezeigt, die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 aus der Streichvorbereitungsposition (Fig. 1) in die Streichausführungsposition gebracht.When the two-layer curtain coater 1 starts the coating, first, as in FIG Fig. 2 shown, the first drip pan 11 and the second drip tray 21 from the working position ( Fig. 1 ) are brought into the retracted position, and then, as in Fig. 3 1, the first curtain nozzle 10 and the second curtain nozzle 20 from the coating preparation position (FIG. Fig. 1 ) placed in the prank execution position.

In der in Fig. 2 gezeigten Situation wird zunächst durch Zuführen des aus der ersten Vorhangdüse 10 fließenden ersten Streichmassenvorhangs C2c zu der Oberfläche Ws der in Richtung des Pfeils X transportierten Papierbahn W die erste Streichmassenschicht C1l durch Streichen ausgebildet, und anschließend werden durch Aufbringen des aus der zweiten Vorhangdüse 20 fließenden zweiten Streichmassenvorhangs C2c auf die erste Streichmassenschicht C1l die erste Streichmasse C1 und die zweite Streichmasse C2 in zwei Schichten übereinander auf die Oberfläche Ws der Papierbahn W gestrichen.In the in Fig. 2 First, by supplying the first coating compound curtain C2c flowing out of the first curtain nozzle 10 to the surface Ws of the paper web W conveyed in the direction of the arrow X, the first coating material layer C1l is first formed by brushing, and then by applying the material from the first coating material C2c second curtain nozzle 20 flowing second coating slurry curtain C2c on the first coat layer C1l the first coating slip C1 and the second coating slip C2 in two layers one above the other on the surface Ws of the paper web W deleted.

Wenn die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 durch Bewegen aus der in Fig. 1 gezeigten Streichvorbereitungsposition in die in Fig. 3 gezeigte Streichausführungsposition miteinander verbunden worden sind, wird von dem aus der ersten Vorhangdüse 10 fließenden ersten Streichmassenvorhang C1c und dem aus der zweiten Vorhangdüse 20 fließenden zweiten Streichmassenvorhang C2c der Zweischicht-Streichmassenvorhang F gebildet, und durch Versehen der Oberfläche Ws der in Richtung des Pfeils X transportierten Papierbahn W mit dem Zweischicht-Streichmassenvorhang F werden die erste Streichmassenschicht C1I und die zweite Streichmassenschicht C2I in zwei Schichten übereinander auf der Oberfläche Ws der Papierbahn W durch Streichen ausgebildet.When the first curtain nozzle 10 and the second curtain nozzle 20 are moved out of position in FIG Fig. 1 shown prank preparation position in the in Fig. 3 From the first coating slurry curtain C1c flowing from the first curtain nozzle 10 and the second coating slurry curtain C2c flowing from the second curtain nozzle 20, the two-layer coating curtain F is formed, and the surface Ws transported in the direction of the arrow X is conveyed to each other Paper web W with the two-layer coating mass curtain F, the first coating composition layer C1I and the second coating material layer C2I are formed in two layers one above the other on the surface Ws of the paper web W by brushing.

Da, wie vorstehend ausführlich dargelegt worden ist, bei der Zweischicht-Vorhangstreichmaschine 1 der Ausführungsform der vorliegenden Erfindung während der Streichvorbereitung die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 in die Streichvorbereitungsposition, in der sie voneinander entfernt sind, gebracht werden, der erste Streichmassenvorhang C1c aus der ersten Vorhangdüse 10 mit der ersten Auffangwanne 11 aufgefangen wird, der zweite Streichmassenvorhang C2c aus der zweiten Vorhangdüse 20 mit der zweiten Auffangwanne 21 aufgefangen wird und die erste Streichmasse C1 und die zweite Streichmasse C2 unvermischt und voneinander getrennt aufgefangen werden, können die aufgefangene erste Streichmasse C1 und die aufgefangene zweite Streichmasse C2 unverändert wiederverwendet werden, sodass ein Streichmassenverlust bei der Streichvorbereitung vermieden werden kann.Since, as stated in detail above, in the two-layer curtain coater 1 of the embodiment of the present invention, during the coating preparation, the first curtain nozzle 10 and the second curtain nozzle 20 are brought into the coating preparation position where they are apart from each other, the first coating compound curtain C1c is collected from the first curtain nozzle 10 with the first drip pan 11, the second coating mass curtain C2c from the second curtain nozzle 20 is collected with the second drip tray 21 and the first coating composition C1 and the second coating C2 are collected unmixed and separated from each other, the collected first Coating C1 and the collected second coating C2 are reused unchanged, so that a coating mass loss in the coating preparation can be avoided.

Bei der Zweischicht-Vorhangstreichmaschine 1 der Ausführungsform ist vorgesehen, dass die erste Vorhangdüse 10 fest angebracht ist und die zweite Vorhangdüse 20 frei beweglich ist, aber wenn die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 zwischen der Streichvorbereitungsposition, in der sie voneinander entfernt sind, und der Streichausführungsposition, in der sie miteinander verbunden sind, frei zueinander bewegt werden sollen, kann auch so verfahren werden, dass die zweite Vorhangdüse 20 fest angebracht wird und die erste Vorhangdüse 10 frei beweglich ist oder die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 frei beweglich sind.In the two-layer curtain coater 1 of the embodiment, it is provided that the first curtain nozzle 10 is fixedly mounted and the second curtain nozzle 20 is freely movable but when the first curtain nozzle 10 and the second curtain nozzle 20 are between the coating preparation position where they are apart from each other. and the carding execution position in which they are connected to each other should be moved freely to each other, can also be moved so that the second curtain nozzle 20 is fixed and the first curtain nozzle 10 is free to move or the first curtain nozzle 10 and the second curtain nozzle 20 free are mobile.

Bei der Zweischicht-Vorhangstreichmaschine 1 der Ausführungsform wird als Mittel zum Bewegen der zweiten Vorhangdüse 20 das Zylinder-Antriebselement 4 verwendet, aber als Mittel, das die erste Vorhangdüse 10 und die zweite Vorhangdüse 20 zueinander bewegt, können selbstverständlich auch verschiedene andere Antriebsmittel als das Zylinder-Antriebselement, beispielsweise ein Kugelumlaufspindelmechanismus, verwendet werden.In the two-layer curtain coater 1 of the embodiment, as the means for moving the second curtain nozzle 20, the cylinder driving member 4 is used, but as a means moving the first curtain nozzle 10 and the second curtain nozzle 20 to each other, of course, various drive means other than the cylinder may be used Drive element, for example, a ball screw mechanism can be used.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1, A1, A
Vorhang-StreichmaschineCurtain coater
22
Trägercarrier
33
Führungsmittelguide means
3G3G
Führungsbahnguideway
3S3S
Gleitstückslide
44
Zylinder-AntriebselementCylinder drive element
1010
erste Vorhangdüsefirst curtain nozzle
10h10h
Düsenkopfnozzle head
1111
erste Auffangwannefirst drip tray
1212
Pumpepump
1313
Rohrpipe
2020
zweite Vorhangdüsesecond curtain nozzle
20h20h
Düsenkopfnozzle head
2121
zweite Auffangwannesecond drip tray
2222
Pumpepump
2323
Rohrpipe
C1C1
erste Streichmassefirst coating
C1cC1c
erster Streichmassenvorhangfirst coating mass curtain
C1lC1L
erste Streichmassenschichtfirst coating layer
C2C2
zweite Streichmassesecond coating
C2cc2c
zweiter Streichmassenvorhangsecond coating mass curtain
C2IC2I
zweite Streichmassenschichtsecond coating layer
FF
Zweischicht-StreichmassenvorhangTwo-layer coating compound curtain
NN
Vorhangdüsecurtain
Nh1nh1
erster Düsenkopffirst nozzle head
Nh2nh2
zweiter Düsenkopfsecond nozzle head
PP
Auffangwannedrip tray
WW
Papierbahnpaper web
WsWs
Oberfläche der PapierbahnSurface of the paper web
XX
Pfeilarrow

Claims (1)

  1. Two-layer curtain coating apparatus (1), which provides a surface (Ws) of a moving paper, board or other fibrous web (W) with a two-layer coating compound curtain (F) composed of a first coating compound curtain (C1c) consisting of a first coating compound (C1) and a second coating compound curtain (C2c) consisting of a second coating compound (C2), and which applies the first coating compound (C1) and the second coating compound (C2) to the surface of the fibrous web in two layers (C1c, C2c,) disposed one above the other,
    characterized in that
    the two-layer curtain coating apparatus (1) has a first curtain nozzle (10) forming the first coating compound curtain (C1c) and a second curtain nozzle (20) forming the second coating compound curtain (C2c), and it being possible for the first curtain nozzle (10) and the second curtain nozzle (20) to be moved freely into a coating preparation position, in which they are at a distance from each other, and a coating execution position, in which they are connected to each other, it being possible for the first coating compound (C1) and the second coating compound (C2) to be collected separately from one another in the coating preparation position, by there being a first collecting trough (P) for the first coating compound curtain (C1c) from the first curtain nozzle (10) and a second collecting trough (P) for the second coating compound curtain (C2c) from the second curtain nozzle (20) and, in the coating execution position, the two-layer coating compound curtain (F) composed of the first (C1c) and the second (C2c) coating compound curtain being formed and laid on the surface of the paper web (Ws) in two layers one above the other.
EP06111144A 2005-06-03 2006-03-15 Two-layer curtain coating apparatus Not-in-force EP1728561B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005164242A JP4766660B2 (en) 2005-06-03 2005-06-03 2-layer curtain coater

Publications (2)

Publication Number Publication Date
EP1728561A1 EP1728561A1 (en) 2006-12-06
EP1728561B1 true EP1728561B1 (en) 2009-01-07

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ID=36926808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06111144A Not-in-force EP1728561B1 (en) 2005-06-03 2006-03-15 Two-layer curtain coating apparatus

Country Status (4)

Country Link
EP (1) EP1728561B1 (en)
JP (1) JP4766660B2 (en)
AT (1) ATE419927T1 (en)
DE (1) DE502006002543D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1939007A3 (en) * 2006-12-27 2009-11-18 FUJIFILM Corporation Multi-layer coating method, and planographic printing plate and manufacturing method thereof
DE102007029646A1 (en) * 2007-06-26 2009-01-08 Voith Patent Gmbh Application process as well as curtain applicator
WO2013011554A1 (en) * 2011-07-19 2013-01-24 フォイト パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング Tandem curtain coating machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE553416A (en) * 1955-12-17
JPH03186377A (en) * 1989-12-15 1991-08-14 Fuji Photo Film Co Ltd Application device
JP2767967B2 (en) * 1990-03-28 1998-06-25 石川島播磨重工業株式会社 Curtain coater
DE19903559B4 (en) * 1998-01-30 2004-02-26 Mitsubishi Paper Mills Limited Process and apparatus for curtain coating
DE10057729A1 (en) * 2000-11-22 2002-05-23 Voith Paper Patent Gmbh Web coating station, has two applicators, to deliver the coatings as falling curtains, with different coating media and a structured gap between the strike points of each at the moving substrate for the overlaid layers
DE10320146A1 (en) * 2003-05-06 2004-11-25 Voith Paper Patent Gmbh Multi-layer application device for applying application medium by means of at least one multi-layer curtain or veil
DE10359676A1 (en) * 2003-12-18 2005-07-14 Voith Paper Patent Gmbh Machine for one-sided or two-sided application of a liquid or pasty application medium on the surface of a moving material web and associated operating method

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ATE419927T1 (en) 2009-01-15
JP2006334538A (en) 2006-12-14
DE502006002543D1 (en) 2009-02-26
EP1728561A1 (en) 2006-12-06
JP4766660B2 (en) 2011-09-07

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