EP2253384A1 - Coating device for elongated workpieces - Google Patents

Coating device for elongated workpieces Download PDF

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Publication number
EP2253384A1
EP2253384A1 EP10162699A EP10162699A EP2253384A1 EP 2253384 A1 EP2253384 A1 EP 2253384A1 EP 10162699 A EP10162699 A EP 10162699A EP 10162699 A EP10162699 A EP 10162699A EP 2253384 A1 EP2253384 A1 EP 2253384A1
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EP
European Patent Office
Prior art keywords
workpiece
coating
coating device
suction chamber
die
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
EP10162699A
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German (de)
French (fr)
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EP2253384B1 (en
EP2253384B2 (en
Inventor
Gerhard Stahl
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Cefla Deutschland GmbH
Original Assignee
Delle Vedove Deutschland GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0207—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the work being an elongated body, e.g. wire or pipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0278—Arrangement or mounting of spray heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B16/00—Spray booths
    • B05B16/90—Spray booths comprising conveying means for moving objects or other work to be sprayed in and out of the booth, e.g. through the booth
    • B05B16/95—Spray booths comprising conveying means for moving objects or other work to be sprayed in and out of the booth, e.g. through the booth the objects or other work to be sprayed lying on, or being held above the conveying means, i.e. not hanging from the conveying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths

Definitions

  • the invention relates to a coating device for elongated workpieces.
  • the workpiece is usually continuously through a suction, in which negative pressure prevails.
  • the inlet and the outlet opening of the suction chamber, through which the workpiece is guided in this case has a die.
  • the matrix is modeled on the outer contour of the workpiece, so that a small gap remains between the die opening and the workpiece.
  • the suction chamber is connected to a vacuum pump to create negative pressure within the suction chamber. In this case, ambient air is sucked through the gap between the die and the workpiece in the suction chamber.
  • coating material such as paint is supplied to the suction chamber, wherein due to the turbulence occurring in the air entering the chamber, a corresponding swirling of the coating medium and thus the generation of a mist is caused.
  • the injection frame has an opening through which the workpiece is passed.
  • the cross section The opening is modeled on the profile of the workpiece, so that a gap between the workpiece and spray frame is formed.
  • Within the spray frame several holes are provided, which are aligned either horizontally or vertically. The hole points in the direction of the workpiece and serves as a nozzle.
  • targeted delivery of the coating material takes place. This is particularly useful in complex profiles with grooves, etc., such as window frame profiles, to ensure complete, all-inclusive coating of the workpiece.
  • the provision of the coating frame within the suction chamber has the disadvantage that, moreover, a coating mist is produced in the suction chamber and, as a result, deposition of the coating material takes place on the coating frame itself.
  • the changing of the coating frame is also extremely expensive, since this, the suction chamber must be opened.
  • the provision of a coating frame in the suction chamber is only suitable for a complete coating of the workpiece on all surfaces, since a coating mist is produced in the suction chamber.
  • the object of the invention is to provide a coating device for elongated workpieces, in which the applicator is well accessible for applying a coating medium.
  • the coating device according to the invention for elongated workpieces which are in particular elongated profiles made of wood or plastic, has a conveying device for moving the workpiece in the longitudinal direction.
  • the conveyor is, for example, a conveyor belt, a plurality of driven and non-driven conveyor rollers and the like.
  • the coating device has a suction chamber, through which the workpiece is passed.
  • the suction chamber is preferably used for removing excess coating material.
  • the suction chamber is preferably connected to a suction device.
  • the suction device can generate negative pressure in the suction chamber,
  • the suction chamber has an inlet opening and an outlet opening, through which the workpiece is passed.
  • a die is arranged in the inlet and / or the outlet opening.
  • the die preferably has a die opening whose cross-section substantially corresponds to the profile of the workpiece, wherein a gap is formed between the workpiece and the die opening.
  • the coating device has an application device for applying a coating medium to at least one surface of the workpiece. According to the invention, the application device is integrated in the inlet die and / or the outlet die. As a result, it is possible in a simple manner to exchange the application device, for example, for cleaning clogged nozzles, etc.
  • the application device preferably has nozzles pointing into the suction chamber.
  • the nozzles which are designed in particular as slit nozzles, deliver coating material, such as a coating varnish, in the direction of the workpiece and also in the direction of the interior of the suction chamber. Not used for coating the workpiece surface coating material is thus removed via the suction chamber.
  • the applicator integrated in the inlet and / or outlet die in a particularly preferred embodiment of the invention preferably has a plurality of nozzles. These can be arranged around the entire circumference of the die opening, so that a coating of all workpiece surfaces is possible. In particular, however, it is also possible to provide one or more nozzles only on individual sides of the die opening or, depending on the coating requirement, to switch off individual nozzles or not to supply them with coating material. In particular, by the ability to turn off individual nozzles or close, it is possible to coat with a die depending on the control of the nozzle different surfaces of the workpiece. For this purpose, it is preferred that each nozzle or a group of nozzles, each with a separate supply line, is connected to the supply of coating material. By switching off or closing a corresponding valve in the supply line, it is thus possible to switch off individual or groups of nozzles.
  • nozzles designed as slot nozzles it is preferred that a plurality of slot nozzles are arranged next to one another.
  • at least two slot nozzles are then preferably connected to separate feed lines.
  • the cross-sectional opening of the die can be varied in a simple manner in order to be able to process other, smaller workpieces with the aid of the same die. It is thus not necessary to replace the entire die, but only to use a cover in the die to coat another workpiece can.
  • the nozzles provided in the region of the cover element are then preferably switched off or separated from the die. Also, a redirection or introduction of coating material into a channel of the cover is possible, so that a further nozzle is formed by the cover itself. This makes it possible to coat also an edge of the workpiece, which points in the direction of the cover and not the original die.
  • a steering element is provided at the nozzle outlet.
  • the steering element serves to deflect the coating medium in the direction of the workpiece.
  • the steering element is in this case designed such that a deflection angle is adjustable. This can be done for example by changing the position of the steering element relative to the nozzle exit.
  • the setting of the parking angle can also be realized by exchanging differently designed steering elements. In a preferred embodiment, this is realized in that the steering element is plate-shaped and at least partially covers the slot nozzle. In this case, it is preferable for the edge of the steering element pointing in the direction of the workpiece to be chamfered or to have a chamfer. Depending on the chamfer angle and / or size of the surface of the chamfers, a different setting angle can be defined.
  • the embodiment of the coating device according to the invention shown in the figures has a suction chamber 10, which is connected to a suction device, not shown, such as a vacuum pump.
  • a suction device such as a vacuum pump.
  • the extraction of the air from the suction chamber 10 is effected by suction openings 12 arranged laterally, for example on a side wall of the suction chamber.
  • the suction chamber which is for example rectangular, has an inlet opening 14 and an outlet opening 16. Through the two openings 14, 16, a movement of a workpiece 18 in the direction of the arrow 20 takes place.
  • the transport of the workpiece 18, which is, for example, a board, is carried out by a conveyor 22, in which it is in the illustrated embodiment is at least partially driven rollers.
  • a die 24 is arranged both at the inlet opening 14 and at the outlet opening 16.
  • the die 24 has a die opening 26 (FIG. Fig. 3 ) on.
  • the cross section of the die opening corresponds to the cross section of the workpiece 18 to be coated, wherein the cross section of the die opening is slightly larger, so that between the workpiece 18 and an inner side 28 of the die opening 26, a gap is formed.
  • ambient air is drawn from the suction device connected to the suction chamber 10, as indicated by the arrows 30 (FIG. Fig. 1 ), sucked into the suction chamber.
  • coating medium such as paint from the suction chamber is avoided.
  • the coating of an upper side 32 of the workpiece 18 takes place on the side of the outlet opening 16 of the suction chamber 10, that is shortly before the exit of the workpiece 18 from the suction chamber 10.
  • 24 nozzles are arranged in the die, in particular as slit 36th , 38, 40 ( Fig. 4 ) are formed.
  • the slot dies provided in the die are provided with a plurality of feed lines 42 (FIG. Fig. 2 ) connected.
  • the supply lines 42 are connected to a reservoir, not shown, for the coating agent such as the paint. Further, the supply lines are connected to a pump for supplying the coating material to the slit nozzles 36, 38, 40.
  • a deflection element 44 has the in Fig. 4 illustrated cross section, wherein at one edge of the steering member 44, a chamfer 46 is provided.
  • the chamfer 46 points in the direction of the workpiece, or in the direction of the die opening 26 as well as in the direction of the slot nozzles 36, 38, 40.
  • the attachment of the steering elements 44 is effected by screws 48, wherein a screw head on an outer side 50 (FIG. Fig. 4 ) of the steering element 44 abuts.
  • the deflection angle of the coating medium on the surface 32 of the workpiece 18 can be adjusted.
  • Fig. 3 are for clarity two steering elements 44, not shown, so that the slot-shaped openings of the slot nozzles 36, 38, 40 are visible,
  • a cover element 52 (FIG. Fig. 2 ).
  • the die opening 26 is partially closed, so that a new smaller die opening 54 is formed.
  • the cover 52 in the die opening 26 in the illustrated embodiment the three right feed lines in Fig. 2 closed.
  • the other supply lines for example, only the slot nozzles 38 and 40 are then supplied with coating medium.
  • the slit nozzles 36 are no longer with coating medium provided.
  • the lateral slot nozzle 40 is over the in Fig. 2 upper left feed line 42 supplied with coating medium when an all-round coating of the workpiece takes place.

Abstract

The device has a conveying device (22) for moving a workpiece (18) in a longitudinal direction (20) of a suction chamber (10) through which the workpiece is guided. Application devices (42) apply a coating medium on a surface of the workpiece. A die plate (24) e.g. inlet die plate and/or the outlet die plate, is arranged at an inlet opening (14) and/or an outlet opening (16) of the suction chamber. The application devices are integrated in the die plate. The application devices comprise nozzles e.g. slot nozzles, that points the suction chamber.

Description

Die Erfindung betrifft eine Beschichtungsvorrichtung für langgestreckte Werkstücke.The invention relates to a coating device for elongated workpieces.

Zur Beschichtung langgestreckter Werkstücke ist es bekannt eine Beschichtung mit Hilfe von Vakuumkammern durchzuführen. Hierbei wird das Werkstück meist kontinuierlich durch eine Absaugkammer, in der Unterdruck herrscht, geführt. Die Einlass- und die Auslaßöffnung der Absaugkammer, durch die dass Werkstück geführt wird, weist hierbei eine Matrize auf. Die Matrize ist der Außenkontur des Werkstücks nachgebildet, so dass zwischen der Matrizenöffnung und dem Werkstück ein geringer Spalt verbleibt. Die Absaugkammer ist mit einer Vakuumpumpe verbunden, um innerhalb der Absaugkammer Unterdruck zu erzeugen. Hierbei wird Umgebungsluft durch den Spalt zwischen Matrize und Werkstück in die Absaugkammer eingesaugt. Zur allseitigen Beschichtung der Werkstücke ist es bekannt, in der Absaugkammer einen Nebel aus Beschichtungsmaterial zu erzeugen. Hierzu wird Beschichtungsmaterial wie beispielsweise Lack der Absaugkammer zugeführt, wobei aufgrund der beim Lufteintreten in die Kammer auftretenden Verwirbelungen ein entsprechendes Verwirbeln des Beschichtungsmediums und somit das Erzeugen eines Nebels hervorgerufen wird.For coating elongate workpieces, it is known to perform a coating with the aid of vacuum chambers. Here, the workpiece is usually continuously through a suction, in which negative pressure prevails. The inlet and the outlet opening of the suction chamber, through which the workpiece is guided, in this case has a die. The matrix is modeled on the outer contour of the workpiece, so that a small gap remains between the die opening and the workpiece. The suction chamber is connected to a vacuum pump to create negative pressure within the suction chamber. In this case, ambient air is sucked through the gap between the die and the workpiece in the suction chamber. For all-round coating of the workpieces, it is known to produce a mist of coating material in the suction chamber. For this purpose, coating material such as paint is supplied to the suction chamber, wherein due to the turbulence occurring in the air entering the chamber, a corresponding swirling of the coating medium and thus the generation of a mist is caused.

Ferner ist es aus DE 43 37 438 bekannt, zusätzlich innerhalb der Absaugkammer einen Spritzrahmen vorzusehen. Der Spritzrahmen weist eine Öffnung auf, durch die das Werkstück hindurchgeführt wird. Der Querschnitt der Öffnung ist dem Profil des Werkstücks nachgebildet, so dass ein Spalt zwischen Werkstück und Spritzrahmen ausgebildet ist. Innerhalb des Spritzrahmens sind mehrere Bohrungen vorgesehen, die entweder horizontal oder vertikal ausgerichtet sind. Die Bohrung weist in Richtung des Werkstücks und dient als Düse. Durch den innerhalb der Absaugkammer vorgesehenen Beschichtungsrahmen erfolgt somit ein gezieltes Zuführen des Beschichtungsmaterials. Dies ist insbesondere bei komplexen Profilen mit Nuten etc., wie beispielsweise Fensterrahmenprofilen zweckmäßig, um ein vollständiges allumfassendes Beschichten des Werkstückes sicherzustellen. Das Vorsehen des Beschichtungsrahmens innerhalb der Absaugkammer weist jedoch den Nachteil auf, dass weiterhin ein Beschichtungsnebel in der Absaugkammer entsteht und hierdurch eine Ablagerung des Beschichtungsmaterials auf dem Beschichtungsrahmen selbst erfolgt. Das Wechseln des Beschichtungsrahmens ist ferner äußerst aufwendig, da hierzu die Absaugkammer geöffnet werden muss. Ferner ist das Vorsehen eines Beschichtungsrahmens in der Absaugkammer nur für eine vollständige Beschichtung des Werkstücks an allen Oberflächen geeignet, da in der Absaugkammer ein Beschichtungsnebel entsteht.Furthermore, it is off DE 43 37 438 known to additionally provide a spray frame within the suction chamber. The injection frame has an opening through which the workpiece is passed. The cross section The opening is modeled on the profile of the workpiece, so that a gap between the workpiece and spray frame is formed. Within the spray frame several holes are provided, which are aligned either horizontally or vertically. The hole points in the direction of the workpiece and serves as a nozzle. As a result of the coating frame provided within the suction chamber, targeted delivery of the coating material takes place. This is particularly useful in complex profiles with grooves, etc., such as window frame profiles, to ensure complete, all-inclusive coating of the workpiece. However, the provision of the coating frame within the suction chamber has the disadvantage that, moreover, a coating mist is produced in the suction chamber and, as a result, deposition of the coating material takes place on the coating frame itself. The changing of the coating frame is also extremely expensive, since this, the suction chamber must be opened. Furthermore, the provision of a coating frame in the suction chamber is only suitable for a complete coating of the workpiece on all surfaces, since a coating mist is produced in the suction chamber.

Um beispielsweise ein dreiseitiges Beschichtung eines vierseitigen Werkstücks vorzunehmen, ist es bekannt, innerhalb der Absaugkammer ein Auflageelement, wie ein Auflageblech vorzusehen. Dieses liegt an der nicht zu beschichtenden Fläche des Werkstücks an. Da das Werkstück jedoch üblicherweise nicht vollständig eben ist, kann zwischen Auflageblech und dem Werkstück ein Spalt auftreten. Dies führt dazu, dass auch Beschichtungsmedium an die nicht zu beschichtende Oberfläche gelangt. Diese Problematik besteht insbesondere wenn es sich bei dem Werkstück um ein Naturprodukt wie Holz handelt.For example, to make a three-sided coating of a four-sided workpiece, it is known to provide a support element, such as a support plate, within the suction chamber. This is due to the non-coated surface of the workpiece. However, since the workpiece is usually not completely flat, a gap may occur between the support plate and the workpiece. As a result, coating medium also reaches the surface that is not to be coated. This problem exists in particular when the workpiece is a natural product such as wood.

Aufgabe der Erfindung ist es, eine Beschichtungsvorrichtung für langgestreckte Werkstücke zu schaffen, bei der die Auftrageinrichtung zum Auftragen eines Beschichtungsmediums gut zugänglich ist.The object of the invention is to provide a coating device for elongated workpieces, in which the applicator is well accessible for applying a coating medium.

Die Lösung der Aufgabe erfolgt erfindungsgemäß durch die Merkmale des Anspruchs 1.The object is achieved according to the invention by the features of claim 1.

Die erfindungsgemäße Beschichtungsvorrichtung für langgestreckte Werkstücke, bei denen es sich insbesondere um langgestreckte Profile aus Holz oder Kunststoff handelt, weist eine Fördereinrichtung zum Bewegen des Werkstücks in Längsrichtung auf. Bei der Fördereinrichtung handelt es sich beispielsweise um ein Förderband, mehrere angetriebene und nicht angetriebene Förderrollen und dergleichen. Ferner weist die Beschichtungsvorrichtung eine Absaugkammer auf, durch die das Werkstück hindurchgeführt wird. Die Absaugkammer dient hierbei vorzugsweise zum Abführen überschüssigen Beschichtungsmaterials. Hierzu ist die Absaugkammer vorzugsweise mit einer Absaugeinrichtung verbunden. Durch die Absaugeinrichtung kann Unterdruck in der Absaugkammer erzeugt werden,The coating device according to the invention for elongated workpieces, which are in particular elongated profiles made of wood or plastic, has a conveying device for moving the workpiece in the longitudinal direction. The conveyor is, for example, a conveyor belt, a plurality of driven and non-driven conveyor rollers and the like. Furthermore, the coating device has a suction chamber, through which the workpiece is passed. The suction chamber is preferably used for removing excess coating material. For this purpose, the suction chamber is preferably connected to a suction device. The suction device can generate negative pressure in the suction chamber,

Die Absaugkammer weist eine Einlassöffnung sowie eine Auslassöffnung auf, durch die das Werkstück hindurchgeführt wird. In der Einlass- und/oder der Auslassöffnung ist eine Matrize angeordnet. Die Matrize weist vorzugsweise eine Matrizenöffnung auf, deren Querschnitt im wesentlichen dem Profil des Werkstücks entspricht, wobei zwischen dem Werkstück und der Matrizenöffnung ein Spalt ausgebildet ist. Ferner weist die Beschichtungsvorrichtung eine Auftrageinrichtung zum Auftragen eines Beschichtungsmediums auf zumindest eine Oberfläche des Werkstücks auf. Erfindungsgemäß ist die Auftrageinrichtung in die Einlassmatrize und/oder die Auslassmatrize integriert. Hierdurch ist es auf einfache Weise möglich, die Auftragseinrichtung beispielsweise zum Reinigen verstopfter Düsen etc. auszutauschen.The suction chamber has an inlet opening and an outlet opening, through which the workpiece is passed. In the inlet and / or the outlet opening a die is arranged. The die preferably has a die opening whose cross-section substantially corresponds to the profile of the workpiece, wherein a gap is formed between the workpiece and the die opening. Furthermore, the coating device has an application device for applying a coating medium to at least one surface of the workpiece. According to the invention, the application device is integrated in the inlet die and / or the outlet die. As a result, it is possible in a simple manner to exchange the application device, for example, for cleaning clogged nozzles, etc.

Insbesondere bei in die Matrize integrierten Auftragseinrichtungen ist ein Umbauen der Beschichtungsvorrichtung für Werkstücke mit anderem Querschnitt schneller möglich. Dies liegt darin begründet, dass gleichzeitig mit dem Austauschen der Matrizen ein Austauschen der Auftrageinrichtung erfolgt. Es ist somit nicht erforderlich, eine beispielsweise innerhalb der Absaugkammer angeordnete Auftrageinrichtung zusätzlich zu einer Einlass- und Auslassmatrize auszutauchen.In particular with application devices integrated into the matrix, a conversion of the coating device for workpieces with a different cross section is possible more rapidly. This is due to the fact that simultaneously with replacement of the matrices exchanging the applicator takes place. It is thus not necessary to dive out an application device arranged, for example, within the suction chamber, in addition to an inlet and outlet die.

Vorzugsweise weist die Auftragseinrichtung in die Absaugkammer weisende Düsen auf. Durch die insbesondere als Schlitzdüsen ausgeführten Düsen wird Beschichtungsmaterial wie ein Beschichtungslack in Richtung des Werkstücks und auch in Richtung des Inneren der Absaugkammer abgegeben. Nicht zur Beschichtung der Werkstückoberfläche genutztes Beschichtungsmaterial wird somit über die Absaugkammer abgeführt.The application device preferably has nozzles pointing into the suction chamber. The nozzles, which are designed in particular as slit nozzles, deliver coating material, such as a coating varnish, in the direction of the workpiece and also in the direction of the interior of the suction chamber. Not used for coating the workpiece surface coating material is thus removed via the suction chamber.

Die in besonders bevorzugter Ausführungsform der Erfindung in die Einlass- und/oder Auslassmatrize integrierte Auftrageinrichtung weist vorzugsweise mehrere Düsen auf. Diese können um den gesamten Umfang der Matrizenöffnung angeordnet sein, so dass ein Beschichten aller Werkstückoberflächen möglich ist. Insbesondere ist es jedoch auch möglich, nur an einzelnen Seiten der Matrizenöffnung eine oder mehrere Düsen vorzusehen oder je nach Beschichtungsanforderung einzelne Düsen auszuschalten bzw. nicht mit Beschichtungsmaterial zu versorgen. Insbesondere durch die Möglichkeit einzelne Düsen auszuschalten oder zu verschließen, ist es möglich, mit einer Matrize je nach Ansteuerung der Düse unterschiedliche Oberflächen des Werkstücks zu beschichten. Hierzu ist es bevorzugt, dass jede Düse oder eine Gruppe von Düsen mit jeweils einer gesonderten Zuführleitung, zur Zufuhr von Beschichtungsmaterial verbunden ist. Durch Abschalten oder Schließen eines entsprechenden Ventils in der Zuführleitung ist es somit möglich, einzelne oder Gruppen von Düsen abzuschalten.The applicator integrated in the inlet and / or outlet die in a particularly preferred embodiment of the invention preferably has a plurality of nozzles. These can be arranged around the entire circumference of the die opening, so that a coating of all workpiece surfaces is possible. In particular, however, it is also possible to provide one or more nozzles only on individual sides of the die opening or, depending on the coating requirement, to switch off individual nozzles or not to supply them with coating material. In particular, by the ability to turn off individual nozzles or close, it is possible to coat with a die depending on the control of the nozzle different surfaces of the workpiece. For this purpose, it is preferred that each nozzle or a group of nozzles, each with a separate supply line, is connected to the supply of coating material. By switching off or closing a corresponding valve in the supply line, it is thus possible to switch off individual or groups of nozzles.

Insbesondere bei als Schlitzdüsen ausgebildeten Düsen, ist es bevorzugt, dass mehrere Schlitzdüsen nebeneinander angeordnet sind. Insbesondere an Breitseiten eines Werkstücks ist es bevorzugt, mindestens zwei Schlitzdüsen nebeneinander anzuordnen. Diese sind sodann vorzugsweise mit gesonderten Zuführleitungen verbunden. Hierdurch ist es beispielsweise auch möglich ein Abdeckelement vorzusehen, durch das ein Teil der Matrizenöffnung verschließbar ist. Hierdurch kann auf einfache Weise die Querschnittsöffnung der Matrize variiert werden, um andere, kleinere Werkstücke mit Hilfe der selben Matrize verarbeiten zu können. Es ist somit nicht erforderlich, die gesamte Matrize auszuwechseln, sondern lediglich ein Abdeckelement in die Matrize einzusetzen, um ein anderes Werkstück beschichten zu können. Die im Bereich des Abdeckelements vorgesehenen Düsen werden sodann vorzugsweise ausgeschaltet bzw. von der Matrize getrennt. Auch ein Um- bzw. Einleiten von Beschichtungsmaterial in einen Kanal des Abdeckelements ist möglich, so dass durch das Abdeckelement selbst eine weitere Düse ausgebildet ist. Hierdurch ist es möglich, auch eine Kante des Werkstücks zu beschichten, die in Richtung des Abdeckelements und nicht der Ursprungsmatrize weist.In particular, in the case of nozzles designed as slot nozzles, it is preferred that a plurality of slot nozzles are arranged next to one another. In particular, on broad sides of a workpiece, it is preferred at least two slot nozzles to arrange next to each other. These are then preferably connected to separate feed lines. As a result, it is also possible, for example, to provide a cover element by which a part of the die opening can be closed. As a result, the cross-sectional opening of the die can be varied in a simple manner in order to be able to process other, smaller workpieces with the aid of the same die. It is thus not necessary to replace the entire die, but only to use a cover in the die to coat another workpiece can. The nozzles provided in the region of the cover element are then preferably switched off or separated from the die. Also, a redirection or introduction of coating material into a channel of the cover is possible, so that a further nozzle is formed by the cover itself. This makes it possible to coat also an edge of the workpiece, which points in the direction of the cover and not the original die.

In einer bevorzugten Weiterbildung der erfindungsgemäßen Düse, bei der es sich insbesondere um eine Schlitzdüse handelt, ist an dem Düsenausgang ein Lenkelement vorgesehen. Das Lenkelement dient zum Ablenken des Beschichtungsmediums in Richtung des Werkstücks. Vorzugsweise ist das Lenkelement hierbei derart ausgebildet, dass ein Ablenkwinkel einstellbar ist. Dies kann beispielsweise durch Verändern der Lage des Lenkelements relativ zum Düsenausgang erfolgen. Das Einstellen des Abstellwinkels kann auch durch Austauschen unterschiedlich ausgebildeter Lenkelemente realisiert werden. In einer bevorzugten Ausführungsform ist dies dadurch realisiert, dass das Lenkelement plattenförmig ausgebildet ist und die Schlitzdüse zumindest teilweise überdeckt. Bevorzugt ist hierbei, dass die in Richtung des Werkstücks weisende Kante des Lenkelements abgeschrägt ist, bzw. eine Fase aufweist. Je nach Fasenwinkel und/oder Größe der Oberfläche der Fasen kann ein unterschiedlicher Abstellwinkel definiert werden.In a preferred embodiment of the nozzle according to the invention, which is in particular a slot nozzle, a steering element is provided at the nozzle outlet. The steering element serves to deflect the coating medium in the direction of the workpiece. Preferably, the steering element is in this case designed such that a deflection angle is adjustable. This can be done for example by changing the position of the steering element relative to the nozzle exit. The setting of the parking angle can also be realized by exchanging differently designed steering elements. In a preferred embodiment, this is realized in that the steering element is plate-shaped and at least partially covers the slot nozzle. In this case, it is preferable for the edge of the steering element pointing in the direction of the workpiece to be chamfered or to have a chamfer. Depending on the chamfer angle and / or size of the surface of the chamfers, a different setting angle can be defined.

Nachfolgend wird die Erfindung anhand einer bevorzugten Ausführungsform unter Bezugnahme auf die anliegenden Zeichnungen näher erläutert.The invention will be explained in more detail with reference to a preferred embodiment with reference to the accompanying drawings.

Es zeigen:

Fig. 1
eine schematische Seitenansicht der Beschichtungsvorrichtung im Schnitt,
Fig. 2
eine schematische Schnittansicht in Richtung der Linie II-II in Fig. 1 bzw. eine schematische Draufsicht einer Außenseite der Beschichtungsvorrichtung,
Fig. 3
eine schematische Draufsicht auf eine Rückseite einer Matrize, und
Fig. 4
eine schematische Schnittansicht einer Ausführungsform eines mit der Matrize verbundenen Lenkelements.
Show it:
Fig. 1
a schematic side view of the coating device in section,
Fig. 2
a schematic sectional view in the direction of the line II-II in Fig. 1 or a schematic plan view of an outer side of the coating device,
Fig. 3
a schematic plan view of a back of a die, and
Fig. 4
a schematic sectional view of an embodiment of a steering element connected to the die.

Das in den Figuren dargestellte Ausführungsbeispiel der erfindungsgemäßen Beschichtungsvorrichtung weist eine Absaugkammer 10 auf, die mit einer nicht dargestellten Saugeinrichtung, wie einer Vakuumpumpe verbunden ist. Die Absaugung der Luft aus der Absaugkammer 10 erfolgt durch seitlich, beispielsweise an einer Seitenwand der Absaugkammer angeordnete Absaugöffnungen 12. Die beispielsweise quaderförmig ausgebildete Absaugkammer weist eine Eintrittsöffnung 14 sowie eine Austrittsöffnung 16 auf. Durch die beiden Öffnungen 14, 16 erfolgt ein Hindurchbewegen eines Werkstücks 18 in Richtung des Pfeils 20.The embodiment of the coating device according to the invention shown in the figures has a suction chamber 10, which is connected to a suction device, not shown, such as a vacuum pump. The extraction of the air from the suction chamber 10 is effected by suction openings 12 arranged laterally, for example on a side wall of the suction chamber. The suction chamber, which is for example rectangular, has an inlet opening 14 and an outlet opening 16. Through the two openings 14, 16, a movement of a workpiece 18 in the direction of the arrow 20 takes place.

Der Transport des Werkstücks 18, bei dem es sich beispielsweise um ein Brett handelt, erfolgt durch eine Fördereinrichtung 22, bei der es sich im dargestellten Ausführungsbeispiel um zumindest teilweise angetriebene Rollen handelt.The transport of the workpiece 18, which is, for example, a board, is carried out by a conveyor 22, in which it is in the illustrated embodiment is at least partially driven rollers.

Im dargestellten Ausführungsbeispiel ist sowohl an der Einlaßöffnung 14 als auch an der Auslassöffnung 16 eine Matrize 24 angeordnet.In the illustrated embodiment, a die 24 is arranged both at the inlet opening 14 and at the outlet opening 16.

Die Matrize 24 weist einen Matrizenöffnung 26 (Fig. 3) auf. Der Querschnitt der Matrizenöffnung entspricht dem Querschnitt des zu beschichtenden Werkstücks 18, wobei der Querschnitt der Matrizenöffnung etwas größer ist, so dass zwischen dem Werkstück 18 und einer Innenseite 28 der Matrizenöffnung 26 ein Spalt ausgebildet ist. Durch diesen Spalt wird von der mit der Absaugkammer 10 verbundenen Saugeinrichtung Umgebungsluft, wie durch die Pfeile 30 (Fig. 1) angedeutet, in die Absaugkammer eingesaugt. Durch das Einsaugen von Luft in die Absaugkammer ist ein Austreten von Beschichtungsmedium wie Lack aus der Absaugkammer vermieden.The die 24 has a die opening 26 (FIG. Fig. 3 ) on. The cross section of the die opening corresponds to the cross section of the workpiece 18 to be coated, wherein the cross section of the die opening is slightly larger, so that between the workpiece 18 and an inner side 28 of the die opening 26, a gap is formed. Through this gap, ambient air is drawn from the suction device connected to the suction chamber 10, as indicated by the arrows 30 (FIG. Fig. 1 ), sucked into the suction chamber. By sucking air into the suction chamber leakage of coating medium such as paint from the suction chamber is avoided.

Im dargestellten Ausführungsbeispiel erfolgt das Beschichten einer Oberseite 32 des Werkstücks 18 auf der Seite der Ausgangsöffnung 16 der Absaugkammer 10, das heißt kurz vor dem Austritt des Werkstücks 18 aus der Absaugkammer 10. Hierzu sind in der Matrize 24 Düsen angeordnet, die insbesondere als Schlitzdüsen 36, 38, 40 (Fig. 4) ausgebildet sind. Die in der Matrize vorgesehenen Schlitzdüsen sind mit mehreren Zuführleitungen 42 (Fig. 2) verbunden. Die Zuführleitungen 42 sind mit einem nicht dargestellten Vorratsbehälter für das Beschichtungsmittel wie den Lack verbunden. Ferner sind die Zuführleitungen mit einer Pumpe zum Zuführen des Beschichtungsmaterials zu den Schlitzdüsen 36, 38, 40 verbunden.In the illustrated embodiment, the coating of an upper side 32 of the workpiece 18 takes place on the side of the outlet opening 16 of the suction chamber 10, that is shortly before the exit of the workpiece 18 from the suction chamber 10. For this purpose, 24 nozzles are arranged in the die, in particular as slit 36th , 38, 40 ( Fig. 4 ) are formed. The slot dies provided in the die are provided with a plurality of feed lines 42 (FIG. Fig. 2 ) connected. The supply lines 42 are connected to a reservoir, not shown, for the coating agent such as the paint. Further, the supply lines are connected to a pump for supplying the coating material to the slit nozzles 36, 38, 40.

Wie aus Fig. 4 ersichtlich, sind die Schlitzdüsen 36, 38, 40 von einem Ablenkelement 44 verdeckt. Das Ablenkelement 44 weist den in Fig. 4 dargestellten Querschnitt auf, wobei an einer Kante des Lenkelements 44 ein Fase 46 vorgesehen ist. Die Fase 46 weist in Richtung des Werkstücks, bzw. in Richtung der Matrizenöffnung 26 sowie auch in Richtung der Schlitzdüsen 36, 38, 40. Die Befestigung der Lenkelemente 44 erfolgt durch Schrauben 48, wobei ein Schraubenkopf an einer Außenseite 50 (Fig, 4) der Lenkelement 44 anliegt.How out Fig. 4 As can be seen, the slot nozzles 36, 38, 40 are covered by a deflection element 44. The deflector 44 has the in Fig. 4 illustrated cross section, wherein at one edge of the steering member 44, a chamfer 46 is provided. The chamfer 46 points in the direction of the workpiece, or in the direction of the die opening 26 as well as in the direction of the slot nozzles 36, 38, 40. The attachment of the steering elements 44 is effected by screws 48, wherein a screw head on an outer side 50 (FIG. Fig. 4 ) of the steering element 44 abuts.

Je nach Winkel der Fase 46 kann der Ablenkwinkel des Beschichtungsmediums auf die Oberfläche 32 des Werkstücks 18 eingestellt werden.Depending on the angle of the chamfer 46, the deflection angle of the coating medium on the surface 32 of the workpiece 18 can be adjusted.

In Fig. 3 sind zur Verdeutlichung zwei Lenkelemente 44, nicht dargestellt, so dass die schlitzförmigen Öffnungen der Schlitzdüsen 36, 38, 40 sichtbar sind,In Fig. 3 are for clarity two steering elements 44, not shown, so that the slot-shaped openings of the slot nozzles 36, 38, 40 are visible,

Je nachdem welche der Seiten des Werkstücks 18 beschichtet werden soll, ist es möglich einzelne Zuführleitungen 42 zu den Schlitzdüsen 36, 38, 40 zu unterbrechen bzw. die entsprechenden Zuführventile zu schließen. Hierdurch ist es auf einfache Weise möglich, nur eine einzige Oberfläche zu beschichten, wobei aufgrund der erfindungsgemäßen Anordnung der Auftragseinrichtung, das heißt im wesentlichen der Düsen und der dazugehörigen Bauteile innerhalb der Matrize ein Beschichten der übrigen Oberflächen durch Beschichtungsnebel oder Spritzer vermieden ist. Überflüssiges Beschichtungsmaterial wird durch die obere Absaugöffnung 12 (Fig. 1) absaugt, so dass es nicht auf andere Oberflächen des Werkstückträgers 18 gelangt.Depending on which of the sides of the workpiece 18 is to be coated, it is possible to interrupt individual feed lines 42 to the slot nozzles 36, 38, 40 or to close the corresponding feed valves. This makes it possible in a simple manner to coat only a single surface, wherein due to the inventive arrangement of the applicator, that is substantially the nozzle and the associated components within the die coating of the remaining surfaces is avoided by coating mist or splashes. Excess coating material is passed through the upper suction opening 12 (FIG. Fig. 1 ) sucks so that it does not reach other surfaces of the workpiece carrier 18.

Ferner ist es möglich, in die Matrizenöffnung 26 ein Abdeckelement 52 (Fig. 2) anzuordnen. Durch das Abdeckelement 52 wird die Matrizenöffnung 26 teilweise verschlossen, so dass eine neue kleinere Matrizenöffnung 54 ausgebildet ist. Hierdurch ist es möglich kleinere Werkstücke mit ferner ggf. anderem Profil mit Hilfe der selben Matrize zu beschichten. Zusätzlich zu dem Vorsehen des Abdeckelements 52 in der Matrizenöffnung 26 werden im dargestellten Ausführungsbeispiel die drei rechten Zuführleitungen in Fig. 2 geschlossen. Mit Hilfe der übrigen Zuführleitungen werden sodann beispielsweise nur noch die Schlitzdüsen 38 und 40 mit Beschichtungsmedium versorgt. Die Schlitzdüsen 36 werden nicht mehr mit Beschichtungsmedium versorgt. Die seitliche Schlitzdüse 40 wird über die in Fig. 2 obere linke Zuführleitung 42 mit Beschichtungsmedium versorgt, wenn eine allseitige Beschichtung des Werkstücks erfolgt.Furthermore, it is possible to insert into the die opening 26 a cover element 52 (FIG. Fig. 2 ). By the cover 52, the die opening 26 is partially closed, so that a new smaller die opening 54 is formed. This makes it possible to coat smaller workpieces with further possibly other profile using the same die. In addition to the provision of the cover 52 in the die opening 26 in the illustrated embodiment, the three right feed lines in Fig. 2 closed. With the help of the other supply lines, for example, only the slot nozzles 38 and 40 are then supplied with coating medium. The slit nozzles 36 are no longer with coating medium provided. The lateral slot nozzle 40 is over the in Fig. 2 upper left feed line 42 supplied with coating medium when an all-round coating of the workpiece takes place.

Claims (11)

Beschichtungsvorrichtung für langgestreckte Werkstücke, mit
einer Fördereinrichtung (22) zum Bewegen des Werkstücks (18) in Längsrichtung (20),
einer Absaugkammer (10), durch die das Werkstück (18) hindurch geführt wird,
einer Auftrageinrichtung (36, 38, 40, 42, 44) zum Auftragen eines Beschichtungsmediums auf zumindest eine Oberfläche (32) des Werkstücks (18), und
einer an einer Einlassöffnung (14) und/oder einer Auslassöffnung (16) der Absaugkammer (10) angeordneten Matrize (24),
dadurch gekennzeichnet, dass
die Auftragseinrichtung (36, 38, 40, 42, 44) in die Einlassmatrize (24) und/oder die Auslassmatrize (24) integriert ist.Coating device for elongated workpieces, with
a conveyor (22) for moving the workpiece (18) in the longitudinal direction (20),
a suction chamber (10) through which the workpiece (18) is passed,
an application device (36, 38, 40, 42, 44) for applying a coating medium to at least one surface (32) of the workpiece (18), and
a die (24) arranged on an inlet opening (14) and / or an outlet opening (16) of the suction chamber (10),
characterized in that
the applicator (36, 38, 40, 42, 44) is integrated in the inlet die (24) and / or the outlet die (24). Beschichtungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Auftragseinrichtung (36, 38, 40, 42, 44) in die Absaugkammer (10) weisende Düsen (36, 38, 40) aufweist, die vorzugsweise als Schlitzdüsen ausgebildet sind.Coating device according to claim 1, characterized in that the application device (36, 38, 40, 42, 44) in the suction chamber (10) facing nozzles (36, 38, 40), which are preferably formed as slit nozzles. Beschichtungsvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass zumindest eine der mehreren Düsen (36, 38, 40) mit mindestens einer Zuführleitung (42) verbunden ist.Coating device according to claim 2, characterized in that at least one of the plurality of nozzles (36, 38, 40) is connected to at least one supply line (42). Beschichtungsvorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Auftragseinrichtung (36, 38, 40, 42, 44) insbesondere zur Beschichtung einer Breitseite (32) des Werkstücks (10) mindestens zwei nebeneinander angeordnete Düsen (36, 38) insbesondere Schlitzdüsen aufweist.Coating device according to one of claims 1 to 3, characterized in that the application device (36, 38, 40, 42, 44) in particular for coating a broad side (32) of the workpiece (10) at least two juxtaposed nozzles (36, 38) in particular Slit nozzles has. Beschichtungsvorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Zuführleitungen (42) zumindest teilweise abschaltbar sind.Coating device according to claim 3 or 4, characterized in that the supply lines (42) are at least partially switched off. Beschichtungsvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Matrizenöffnung (26) mit einem Abdeckelement (52) teilweise verschließbar ist.Coating device according to one of claims 1 to 5, characterized in that the die opening (26) with a cover (52) is partially closed. Beschichtungsvorrichtung nach einem der Ansprüche 1 bis 6, gekennzeichnet durch ein an einem Düsenausgang angeordnetes Lenkelement (44) zum Ablenken des Beschichtungsmediums in Richtung des Werkstücks (18).Coating device according to one of claims 1 to 6, characterized by a steering element (44) arranged at a nozzle outlet for deflecting the coating medium in the direction of the workpiece (18). Beschichtungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das Lenkelement (44) derart ausgebildet ist, dass ein Ablenkwinkel einstellbar ist.Coating device according to claim 7, characterized in that the steering element (44) is designed such that a deflection angle is adjustable. Beschichtungsvorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass das Lenkelement (44) zum Abdecken des Ausgangs einer Schlitzdüse (36, 38, 40) plattenförmig ausgebildet ist.Coating device according to claim 7 or 8, characterized in that the steering element (44) for covering the output of a slot nozzle (36, 38, 40) is plate-shaped. Beschichtungsvorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass das Lenkelement (44) an einer in Richtung des Werkstücks (18) weisenden Kante eine Fase (46) zur Festlegung des Ablenkwinkels aufweist.Coating device according to one of claims 7 to 9, characterized in that the steering element (44) at a pointing in the direction of the workpiece (18) edge has a chamfer (46) for fixing the deflection angle. Beschichtungsvorrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Absaugkammer (10) mit einer Saugeinrichtung zur Unterdruckerzeugung verbunden ist.Coating device according to one of claims 1 to 10, characterized in that the suction chamber (10) is connected to a suction device for generating negative pressure.
EP10162699.2A 2009-05-18 2010-05-12 Coating device for elongated workpieces Not-in-force EP2253384B2 (en)

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CN107971171A (en) * 2017-09-30 2018-05-01 科澳特石油工程技术有限公司 The outer oiling device of petroleum pipeline

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EP2253384B2 (en) 2019-08-28

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