EP0333040A2 - Process and device for cleaning spraying devices - Google Patents

Process and device for cleaning spraying devices Download PDF

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Publication number
EP0333040A2
EP0333040A2 EP89104211A EP89104211A EP0333040A2 EP 0333040 A2 EP0333040 A2 EP 0333040A2 EP 89104211 A EP89104211 A EP 89104211A EP 89104211 A EP89104211 A EP 89104211A EP 0333040 A2 EP0333040 A2 EP 0333040A2
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EP
European Patent Office
Prior art keywords
interior
cleaned
cleaning
nozzle arrangement
spray
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
EP89104211A
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German (de)
French (fr)
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EP0333040B1 (en
EP0333040A3 (en
Inventor
Kurt Vetter
Michael Baumann
Thomas Hezel
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Duerr GmbH
Original Assignee
Duerr GmbH
Behr Industrieanlagen GmbH and Co KG
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Publication of EP0333040A2 publication Critical patent/EP0333040A2/en
Publication of EP0333040A3 publication Critical patent/EP0333040A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
    • B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles
    • 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
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads

Definitions

  • the invention relates to a method according to the preamble of claim 1 and an apparatus for performing this method.
  • Spraying devices such as Spray guns for atomizing or atomizing paint, such as those used to coat vehicle bodies or other workpieces, must be cleaned at regular intervals, especially in the area of the paint nozzles and any air nozzles that may be present. are freed from the self-coating covering created by paint mist and drops of paint.
  • From DE-PS 28 54 325 it is already known to free the spray head of a paint spray gun after a predetermined operating time from remote spray material such as paint or varnish, that it is inserted into the opening of a collecting cup and from a nozzle located centrally on the bottom of the cup Flushing liquid is applied. By inserting the spray head into the cup, its interior is sealed airtight to the outside.
  • the invention has for its object to provide a method and a device by means of which a spray gun or other spraying devices can be cleaned more thoroughly than before, in particular in the area of the spray material nozzle and any air nozzles present, in a time-saving manner with low consumption of cleaning medium, on their outside exposed to a constant risk of coating .
  • An important additional advantage of the invention is that the cleaning process can be controlled fully automatically in a simple manner. This is particularly important when using the invention for painting robots, but significant advantages of the invention also come into play when cleaning hand spray guns.
  • the drawing shows, largely schematically, a device 1 for cleaning a spray gun 2 (indicated by dashed lines).
  • the cleaning device 1 has a container with an interior space 3 that is rotationally symmetrical about a generally vertical axis. On its top side, the interior space 3 is concentric with its axis Opening 4 through which the part of the spray gun 2 to be cleaned can be inserted into the interior.
  • the space between the spray gun 2 used in the device 1 and the edge of the opening 4 can be sealed by a sealing device 5, which prevents the escape of cleaning liquid and paint residues.
  • the sealing device 5 is used for centering the position, ie fixing the cleaning position of the spray gun 2 in the cleaning device 1.
  • the sealing device is preferably designed such that unavoidable radial and axial positional deviations between the spray gun 2 and the container of the cleaning device 1 can be compensated. At in the example shown, it consists of an elastic, bead-like lip seal.
  • the sealing device can also contain a sealing ring arranged in a floating manner in a receiving structure (not shown).
  • a nozzle arrangement 6 In the interior of the interior 3 there is a nozzle arrangement 6 rotatable about an axis running transversely to the axis of the container.
  • the nozzle arrangement 6 is supported by means of two shafts 7, which contain the feed lines for a cleaning liquid to be supplied to the nozzle arrangement and are rotatably supported in two passages 12 sealed against the outside. Lines are connected to the ends of the shafts 7 via a rotary seal 13.
  • the inflow of the cleaning liquid is controlled by valves 9, preferably by solenoid valves, which facilitate an automatic operating sequence.
  • the nozzle arrangement 6 contains a plurality of nozzles 8 or other nozzle openings through which the cleaning liquid is sprayed onto the area of the spray gun 2 to be cleaned. It consists essentially of a generally U-shaped or approximately semicircular curved bracket, which is pivotally mounted about the axis of the shafts 7 extending transversely through the two bracket legs and is arranged such that the spray gun 2 with its area to be cleaned in the space between protrudes the two stirrup legs.
  • the bracket is pivotable by at least about 180 °, so it can be pivoted about the end of the spray gun 2 projecting into the interior 3 from its front side, which is visible in the drawing, to its rear side, so that all relevant areas of the spray gun at all points during the pivoting movement be sprayed directly.
  • the nozzle arrangement 6 is moved by a pneumatically or electrically controlled drive device 16 which is coupled to one of the shafts 7 and which is connected to an adjusting device.
  • the rotary movement takes place by certain, previously set angular amounts in the two directions of rotation, which can be reversed on the drive device 16.
  • Attached to the other shaft 7 is a position sensor 14, which outputs information about the current position of the nozzle arrangement 6 via a position sensor 15.
  • two proximity sensors can be attached to the position sensor 15.
  • stationary nozzles can also be provided.
  • the bracket is in a lateral basic position (not shown). For example, in this position, rinsing liquid or rinsing fluid can be emptied from the inside of the spray gun 2 into the cleaning device 1 with internal rinsing.
  • the internal flushing of spray guns is known per se, but here there is the advantage of the problem-free disposal of the flushing liquid.
  • the used cleaning fluid flowing off the spray gun is collected by a funnel-shaped part 10 of the interior 3 and collected in a collecting container 20 via the center of the funnel-shaped part.
  • the cleaning liquid should constantly flow out of the interior 3 during the spraying process.
  • an automatically controllable valve 19 is present between the interior 3 and the collecting container 20, the collecting container 20 can be discharged by compressed air into a drain when the valve is closed be drained. Instead, it can also be emptied by means of negative pressure, that is to say by suction or by pumping.
  • the emptying can be timed and is preferably carried out after the cleaning process has ended, possibly at a time when the cleaned spraying device is already in operation again.
  • the invention is particularly well suited for the fully automatically controlled cleaning of a spray device arranged on a painting robot or other program-controlled automatic movement machine.
  • the cleaning device itself can also be expediently attached to the robot.
  • the part of the spray gun 2 to be cleaned is inserted by the robot from above from a defined entry position (expediently at a slow speed) vertically downward through the opening 4 into the device 1.
  • Sensors can be used to report that the spray gun 2 is in the correct position.
  • the spray gun is then sprayed with cleaning fluid via the nozzle arrangement 6 in accordance with a predetermined sequence diagram while simultaneously moving the swivel bracket.
  • the spray gun 2 is preferably dried with compressed air, which is blown on the spray head of the spray gun 2 by air nozzles 18 which are mounted separately on the wall of the interior 3 and are connected to a line (not shown).
  • the air nozzles could also be arranged on the pivotable nozzle arrangement 6.
  • the cleaning procedure preferably follows a process control.
  • the process control can also be taken over by the control of the painting robot.
  • the device described enables the spray gun to be cleaned reliably in a short time and with low consumption of cleaning fluid.
  • the cleaning of the spray gun of a painting robot can be carried out within a period of 5 to 7 seconds, the consumption of cleaning fluid for a single cleaning process being in the range of 15 to 20 cm 3.

Abstract

In order to clean the outside of a spraying device (2) in the region of the spraying nozzle and, if present, air nozzles, the respective part of the spraying device (2) is inserted through an opening (4) into a container in which all the points to be cleaned are impacted directly with the cleaning liquid from a nozzle arrangement (6) which is moved around the part to be cleaned in an arcuate shape. The invention is particularly suitable for the fully automatic cleaning of the spray pistol guided by a paint-spraying robot. …<IMAGE>…

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruchs 1 sowie eine Vorrichtung zum Durchführen dieses Verfahrens.The invention relates to a method according to the preamble of claim 1 and an apparatus for performing this method.

Sprühvorrichtungen wie z.B. Spritzpistolen zum Zerstäuben oder Vernebeln von Farbe, wie sie zum Beschichten von Fahr­zeugkarossen oder sonstigen Werkstücken verwendet werden, müssen vor allem im Bereich der Farbdüsen und eventuell vor­handener Luftdüsen in regelmäßigen Abständen gereinigt, d.h. von dem durch Farbnebel und Farbtropfen entstehenden Eigen­beschichtungsbelag befreit werden. Aus der DE-PS 28 54 325 ist es bereits bekannt, den Sprühkopf einer Farbspritzpistole jeweils nach einer vorbestimmten Betriebszeit dadurch von ab­gesetztem Sprühmaterial wie Farbe oder Lack zu befreien, daß er in die Öffnung eines Auffangbechers eingesetzt und von einer zentral am Becherboden befindlichen Düse mit Spülflüs­sigkeit beaufschlagt wird. Durch das Einsetzen des Sprüh­kopfes in den Becher wird dessen Innenraum luftdicht nach außen abgeschlossen. Das sich im Becherinneren ansammelnde Gemisch aus Spülflüssigkeit und Verlustfarbe wird durch eine Leitung abgesaugt. Durch das Besprühen und Spülen der Außen­seite des Sprühkopfes innerhalb eines nach außen abgeschlos­senen Reinigungsbehälters werden Probleme hinsichtlich der Umweltbelastung durch Spülflüssigkeit und Farbreste vermieden.Spraying devices such as Spray guns for atomizing or atomizing paint, such as those used to coat vehicle bodies or other workpieces, must be cleaned at regular intervals, especially in the area of the paint nozzles and any air nozzles that may be present. are freed from the self-coating covering created by paint mist and drops of paint. From DE-PS 28 54 325 it is already known to free the spray head of a paint spray gun after a predetermined operating time from remote spray material such as paint or varnish, that it is inserted into the opening of a collecting cup and from a nozzle located centrally on the bottom of the cup Flushing liquid is applied. By inserting the spray head into the cup, its interior is sealed airtight to the outside. The mixture of rinsing liquid and waste paint that accumulates inside the cup is sucked off through a line. By spraying and rinsing the outside of the spray head inside a cleaning container sealed to the outside, problems with regard to the environmental impact of rinsing liquid and paint residues are avoided.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zu schaffen, durch die eine Spritzpistole oder sonstige Sprühvorrichtungen an ihrer einer ständigen Beschichtungsgefahr ausgesetzten Außenseite insbesondere im Bereich der Sprühmaterialdüse und eventuell vorhandener Luft­düsen zeitsparend mit geringem Verbrauch an Reinigungsmedium gründlicher als bisher gereinigt werden kann.The invention has for its object to provide a method and a device by means of which a spray gun or other spraying devices can be cleaned more thoroughly than before, in particular in the area of the spray material nozzle and any air nozzles present, in a time-saving manner with low consumption of cleaning medium, on their outside exposed to a constant risk of coating .

Dieser Aufgabe wird durch das im Anspruch 1 gekennzeichnete Verfahren bzw. durch die im Anspruch 5 gekennzeichnete Vor­richtung gelöst.This object is achieved by the method characterized in claim 1 or by the device characterized in claim 5.

Ein wesentlicher zusätzlicher Vorteil der Erfindung besteht darin, daß der Reinigungsvorgang auf einfache Weise voll­automatisch gesteuert werden kann. Dies ist besonders bei Anwendung der Erfindung für Lackierroboter wichtig, doch kom­men wesentliche Vorteile der Erfindung auch beim Reinigen von Handspritzpistolen zur Geltung.An important additional advantage of the invention is that the cleaning process can be controlled fully automatically in a simple manner. This is particularly important when using the invention for painting robots, but significant advantages of the invention also come into play when cleaning hand spray guns.

Weitere Vorteile der Erfindung ergeben sich durch die in den Unteransprüchen beschriebenen Merkmale.Further advantages of the invention result from the features described in the subclaims.

Als Ausführungsbeispiel der Erfindung wird anhand der Zeich­nung eine Vorrichtung zum Reinigen einer Farbspritzpistole beschrieben.As an embodiment of the invention, a device for cleaning a paint spray gun is described with reference to the drawing.

Die Zeichnung zeigt weitgehend schematisch eine Vorrichtung 1 zum Reinigen einer (gestrichelt angedeuteten) Spritzpistole 2. Die Reinigungsvorrichtung 1 hat einen Behälter mit einem um eine in der Regel vertikale Achse rotationssymmetrisch ausge­bildeten Innenraum 3. An seiner Oberseite hat der Innenraum 3 konzentrisch zu seiner Achse eine Öffnung 4, durch welche der zu reinigende Teil der Spritzpistole 2 in den Innenraum ein­setzbar ist. Der Zwischenraum zwischen der in die Vorrichtung 1 eingesetzten Spritzpistole 2 und dem Rand der Öffnung 4 ist durch eine Abdichtvorrichtung 5 abdichtbar, die den Austritt von Reinigungsflüssigkeit und Farbresten verhindert. Zugleich dient die Abdichtvorrichtung 5 zur Lagezentrierung, d.h. Festlegung der Reinigungsposition der Spritzpistole 2 in der Reinigungsvorrichtung 1. Die Abdichtvorrichtung ist vorzugs­weise derart ausgestaltet, daß unvermeidbare radiale und axiale Lageabweichungen zwischen der Spritzpistole 2 und dem Behälter der Reinigungsvorrichtung 1 ausgleichbar sind. Bei dem dargestellten Beispiel besteht sie aus einer elastischen wulstartigen Lippendichtung. Die Abdichtvorrichtung kann auch einen in einer Aufnahmekonstruktion (nicht dargestellt) schwimmend angeordneten Dichtring enthalten.The drawing shows, largely schematically, a device 1 for cleaning a spray gun 2 (indicated by dashed lines). The cleaning device 1 has a container with an interior space 3 that is rotationally symmetrical about a generally vertical axis. On its top side, the interior space 3 is concentric with its axis Opening 4 through which the part of the spray gun 2 to be cleaned can be inserted into the interior. The space between the spray gun 2 used in the device 1 and the edge of the opening 4 can be sealed by a sealing device 5, which prevents the escape of cleaning liquid and paint residues. At the same time, the sealing device 5 is used for centering the position, ie fixing the cleaning position of the spray gun 2 in the cleaning device 1. The sealing device is preferably designed such that unavoidable radial and axial positional deviations between the spray gun 2 and the container of the cleaning device 1 can be compensated. At in the example shown, it consists of an elastic, bead-like lip seal. The sealing device can also contain a sealing ring arranged in a floating manner in a receiving structure (not shown).

Im Inneren des Innenraums 3 ist eine um eine quer zur Behäl­terachse verlaufende Achse drehbare Düsenanordnung 6 ange­bracht. Die Düsenanordnung 6 ist mittels zweier Wellen 7 ge­lagert, welche die Zuleitungen für eine der Düsenanordnung zuzuführende Reinigungsflüssigkeit enthalten und in zwei Durchführungen 12 gegen die Außenseite abgedichtet drehbar gelagert sind. Mit den Enden der Wellen 7 sind Leitungen über eine Drehdichtung 13 verbunden. Der Zufluß der Reini­gungsflüssigkeit wird durch Ventile 9 gesteuert, vorzugsweise durch Magnetventile, die einen automatischen Betriebsablauf erleichtern.In the interior of the interior 3 there is a nozzle arrangement 6 rotatable about an axis running transversely to the axis of the container. The nozzle arrangement 6 is supported by means of two shafts 7, which contain the feed lines for a cleaning liquid to be supplied to the nozzle arrangement and are rotatably supported in two passages 12 sealed against the outside. Lines are connected to the ends of the shafts 7 via a rotary seal 13. The inflow of the cleaning liquid is controlled by valves 9, preferably by solenoid valves, which facilitate an automatic operating sequence.

Die Düsenanordnung 6 enthält mehrere Düsen 8 oder sonstige Düsenöffnungen, durch welche die Reinigungsflüssigkeit auf den zu reinigenden Bereich der Spritzpistole 2 gesprüht wird. Sie besteht im wesentlichen aus einem allgemein U-förmig oder annähernd halbkreisförmig gebogenen Bügel, der um die quer durch die beiden Bügelschenkel verlaufende Achse der Wellen 7 schwenkbar gelagert ist und derart angeordnet ist, daß die Spritzpistole 2 mit ihrem zu reinigenden Bereich in den Raum zwischen den beiden Bügelschenkeln ragt. Der Bügel ist um mindestens etwa 180° schwenkbar, kann also um das in den Innenraum 3 ragende Ende der Spritzpistole 2 von deren in der Zeichnung sichtbaren Vorderseite bis zu ihrer Rückseite ge­schwenkt werden, so daß während der Schwenkbewegung alle be­treffenden Bereiche der Spritzpistole an allen Stellen direkt besprüht werden. Je nach Ausführung der schwenkbaren Düsen­anordnung kann es auch zweckmäßig sein, wenn die Spritz­pistole 2 bis unterhalb der Schwenkachse in den Innenraum 3 hineinragt.The nozzle arrangement 6 contains a plurality of nozzles 8 or other nozzle openings through which the cleaning liquid is sprayed onto the area of the spray gun 2 to be cleaned. It consists essentially of a generally U-shaped or approximately semicircular curved bracket, which is pivotally mounted about the axis of the shafts 7 extending transversely through the two bracket legs and is arranged such that the spray gun 2 with its area to be cleaned in the space between protrudes the two stirrup legs. The bracket is pivotable by at least about 180 °, so it can be pivoted about the end of the spray gun 2 projecting into the interior 3 from its front side, which is visible in the drawing, to its rear side, so that all relevant areas of the spray gun at all points during the pivoting movement be sprayed directly. Depending on the design of the pivotable nozzle arrangement, it can also be expedient if the spray gun 2 projects into the interior 3 below the pivot axis.

Die Düsenanordnung 6 wird von einer mit einer der Wellen 7 gekoppelten pneumatisch oder elektrisch gesteuerten Antriebs­vorrichtung 16 bewegt, die mit einer Einstelleinrichtung ver­bunden ist. Die Drehbewegung erfolgt um bestimmte, zuvor ein­gestellte Winkelbeträge in den beiden Drehrichtungen, die an der Antriebsvorrichtung 16 umsteuerbar sind. An der anderen Welle 7 ist ein Lagegeber 14 angebracht, der über einen Lage­fühler 15 Informationen über die augenblickliche Stellung der Düsenanordnung 6 abgibt. Zur Umkehrung des Antriebs und Rück­meldung der Bügelgrundstellung können an dem Lagefühler 15 zwei Näherungsinitiatoren angebracht sein.The nozzle arrangement 6 is moved by a pneumatically or electrically controlled drive device 16 which is coupled to one of the shafts 7 and which is connected to an adjusting device. The rotary movement takes place by certain, previously set angular amounts in the two directions of rotation, which can be reversed on the drive device 16. Attached to the other shaft 7 is a position sensor 14, which outputs information about the current position of the nozzle arrangement 6 via a position sensor 15. To reverse the drive and report back to the basic stirrup position, two proximity sensors can be attached to the position sensor 15.

Bei anderen Ausführungsbeispielen der Erfindung können zu­sätzlich zu der beschriebenen Schwenkbügelanordnung oder einer sonstigen bewegbaren Düsenanordnung auch ortsfeste Düsen vorgesehen werden.In other exemplary embodiments of the invention, in addition to the described swivel bracket arrangement or another movable nozzle arrangement, stationary nozzles can also be provided.

Findet keine Schwenkbewegung statt, so steht der Bügel in einer seitlichen Grundstellung (nicht dargestellt). Bei­spielsweise bei dieser Stellung kann Spülflüssigkeit oder Spülfluid aus dem Inneren der Spritzpistole 2 unter Innen­spülung in die Reinigungsvorrichtung 1 hinein entleert wer­den. Die Innenspülung von Spritzpistolen ist zwar an sich bekannt, doch ergibt sich hier der Vorteil der problemlosen Entsorgung der Spülflüssigkeit.If there is no pivoting movement, the bracket is in a lateral basic position (not shown). For example, in this position, rinsing liquid or rinsing fluid can be emptied from the inside of the spray gun 2 into the cleaning device 1 with internal rinsing. The internal flushing of spray guns is known per se, but here there is the advantage of the problem-free disposal of the flushing liquid.

Die von der Spritzpistole abfließende, verbrauchte Reini­gungsflüssigkeit wird durch einen trichterförmigen Teil 10 des Innenraums 3 gesammelt und über die Mitte des trichter­förmigen Teils in einem Sammelbehälter 20 aufgefangen. Vor­zugsweise soll während des Sprühvorgangs die Reinigungsflüs­sigkeit ständig aus dem Innenraum 3 abfließen. Wenn zwischen dem Innenraum 3 und dem Sammelbehälter 20 ein automatisch steuerbares Ventil 19 vorhanden ist, kann der Sammelbehälter 20 bei geschlossenem Ventil durch Druckluft in eine Abfluß­ leitung entleert werden. Die Entleerung kann stattdessen auch durch Unterdruck, also durch Absaugen oder durch Ab­pumpen erfolgen. Die Entleerung kann zeitlich gesteuert werden und erfolgt vorzugsweise nach Beendigung des Reini­gungsvorgangs, möglicherweise zu einer Zeit, wenn die gereinigte Sprühvorrichtung schon wieder in Betrieb ist.The used cleaning fluid flowing off the spray gun is collected by a funnel-shaped part 10 of the interior 3 and collected in a collecting container 20 via the center of the funnel-shaped part. Preferably, the cleaning liquid should constantly flow out of the interior 3 during the spraying process. If an automatically controllable valve 19 is present between the interior 3 and the collecting container 20, the collecting container 20 can be discharged by compressed air into a drain when the valve is closed be drained. Instead, it can also be emptied by means of negative pressure, that is to say by suction or by pumping. The emptying can be timed and is preferably carried out after the cleaning process has ended, possibly at a time when the cleaned spraying device is already in operation again.

Die Erfindung eignet sich besonders gut für die vollauto­matisch gesteuerte Reinigung einer an einem Lackierroboter oder sonstigen programmgesteuerten Bewegungsautomaten ange­ordneten Sprühvorrichtung. In diesem Fall kann auch die Rein­nigungsvorrichtung selbst zweckmäßig an den Roboter angebaut werden. Für den Betrieb der Vorrichtung wird der zu reinigen­de Teil der Spritzpistole 2 vom Roboter von oben aus einer definierten Einfahrposition (zweckmäßig mit langsamer Ge­schwindigkeit) senkrecht nach unten durch die Öffnung 4 in die Vorrichtung 1 eingeführt. Mit (nicht dargestellten) Sensoren kann gemeldet werden, daß die Spritzpistole 2 die richtige Position einnimmt. Über die Düsenanordnung 6 wird die Spritzpistole dann nach einem vorgegebenen Ablaufschema unter gleichzeitiger Bewegung des Schwenkbügels mit Reini­gungsflüssigkeit besprüht. Vorzugsweise wird die Spritzpisto­le 2 nach der Reinigung mit Preßluft getrocknet, die durch separat an der Wand des Innenraums 3 montierte, an eine (nicht dargestellte) Leitung angeschlossene Luftdüsen 18 auf dem Sprühkopf der Spritzpistole 2 geblasen wird. Die Luft­düsen könnten auch auf der schwenkbaren Düsenanordnung 6 an­geordnet werden. Während des Reinigungsvorgangs und des Trocknungsvorgangs werden gegebenenfalls vorhandene Luft­bohrungen (Öffnungen für Hörner- und Zerstäuberluft) in der Außenseite der Spritzpistole 2 durch Ausblasen von Luft vor dem Eindringen von Reinigungsflüssigkeit und Schmutzresten geschützt.The invention is particularly well suited for the fully automatically controlled cleaning of a spray device arranged on a painting robot or other program-controlled automatic movement machine. In this case, the cleaning device itself can also be expediently attached to the robot. For the operation of the device, the part of the spray gun 2 to be cleaned is inserted by the robot from above from a defined entry position (expediently at a slow speed) vertically downward through the opening 4 into the device 1. Sensors (not shown) can be used to report that the spray gun 2 is in the correct position. The spray gun is then sprayed with cleaning fluid via the nozzle arrangement 6 in accordance with a predetermined sequence diagram while simultaneously moving the swivel bracket. After cleaning, the spray gun 2 is preferably dried with compressed air, which is blown on the spray head of the spray gun 2 by air nozzles 18 which are mounted separately on the wall of the interior 3 and are connected to a line (not shown). The air nozzles could also be arranged on the pivotable nozzle arrangement 6. During the cleaning process and the drying process, any air holes (openings for horn and atomizing air) in the outside of the spray gun 2 are protected from the ingress of cleaning liquid and dirt residues by blowing out air.

Das Ablaufschema des Reinigungsvorgangs folgt vorzugsweise einer Prozeßsteuerung. Die Ablaufsteuerung kann auch von der Steuerung des Lackierroboters übernommen werden.The cleaning procedure preferably follows a process control. The process control can also be taken over by the control of the painting robot.

Die beschriebene Vorrichtung ermöglicht eine zuverlässige Reinigung der Spritzpistole in kurzer Zeit und mit geringem Verbrauch an Reinigungsflüssigkeit. Beispielsweise ist die Reinigung der Spritzpistole eines Lackierroboters innerhalb eines Zeitraums von 5 bis 7 Sekunden durchführbar, wobei der Verbrauch an Reinigungsflüssigkeit für einen einmaligen Reinigungsvorgang im Bereich von 15 bis 20 cm³ liegen kann.The device described enables the spray gun to be cleaned reliably in a short time and with low consumption of cleaning fluid. For example, the cleaning of the spray gun of a painting robot can be carried out within a period of 5 to 7 seconds, the consumption of cleaning fluid for a single cleaning process being in the range of 15 to 20 cm 3.

Claims (19)

1) Verfahren zum Reinigen eines durch abgesprühtes Be­schichtungsmaterial verunreinigten Bereiches an der Außen­seite einer zur Werkstückbeschichtung dienenden Sprühvorrich­tung, beispielsweise einer von einem Bewegungsautomaten ge­führten Spritzpistole, wobei der zu reinigende Bereich der Sprühvorrichtung in einen Innenraum einer Reinigungsvorrich­tung eingesetzt
und in diesem Innenraum von einer Düsenanordnung mit einem Reinigungsmedium besprüht wird,
dadurch gekennzeichnet,
daß die Düsenanordnung beim Besprühen der eingesetzten Sprüh­vorrichtung um deren zu reinigenden Bereich herumbewegt wird.1) Method for cleaning an area contaminated by sprayed coating material on the outside of a spray device used for workpiece coating, for example a spray gun guided by an automatic machine, the area to be cleaned of the spray device being inserted into an interior of a cleaning device
and is sprayed with a cleaning medium in this interior by a nozzle arrangement,
characterized,
that the nozzle arrangement is moved around the area to be cleaned when spraying the spray device used. 2) Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch Programmsteuerung zunächst nach dem Einführen der Sprühvorrichtung in den Inneraum der zu reinigende Bereich während einer vorbestimmten Zeit besprüht wird, wobei die Flüssigkeit aus dem Inneraum ständig in einen Sammelbehälter abfließt, und danach der Sammelbehälter entleert wird.2) Method according to claim 1, characterized in that by program control first after the introduction of the spraying device into the interior of the area to be cleaned is sprayed for a predetermined time, the liquid constantly flowing out of the interior into a collecting container, and then the collecting container is emptied becomes. 3) Verfahren nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß die Sprühvorrichtung durch selbsttätige Pro­grammsteuerung in regelmäßigen Zeitabständen unter Unter­brechung des Beschichtungsbetriebes in den Innenraum der Reinigungsvorrichtung eingeführt wird.3) Method according to claim 1 or 2, characterized in that the spraying device is introduced into the interior of the cleaning device by automatic program control at regular intervals with the interruption of the coating operation. 4) Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Sprühvorrichtung in dem Innenraum zuerst mit Reinigungsflüssigkeit und dann mit Druckluft beaufschlagt wird.4) Method according to one of the preceding claims, characterized in that the spraying device in the interior is first acted upon with cleaning liquid and then with compressed air. 5) Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Sammelbehälter durch Druckwirkung in eine Abfluß­leitung entleert wird.5) Method according to claim 2, characterized in that the collecting container is emptied into a drain line by the action of pressure. 6) Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Spülfluid aus dem Inneren der zu reinigenden Sprühvorrichtung in den Innenraum der Reinigungsvorrichtung geleitet wird.6) Method according to one of the preceding claims, characterized in that a rinsing fluid is passed from the inside of the spray device to be cleaned into the interior of the cleaning device. 7) Vorrichtung zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 6 mit einem Behälter mit einem nach außen durch eine Öffnung (4) zugänglichen Innenraum (3), in den die Sprühvorrichtung (2) mit ihrem zu reinigen­den Bereich einsetzbar ist, und einer in dem Innenraum (3) des Behälters angeordneten Düsenanordnung (6), dadurch gekennzeichnet, daß die Düsenanordnung (6) um mindestens eine Achse (7) bewegbar ist.7) Device for performing the method according to one of claims 1 to 6 with a container having an interior (3) accessible to the outside through an opening (4), in which the spray device (2) with its area to be cleaned can be used, and one Nozzle arrangement (6) arranged in the interior (3) of the container, characterized in that the nozzle arrangement (6) can be moved about at least one axis (7). 8) Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Düsenanordnung (6) um eine Achse schwenkbar ist, die quer zur Längsachse der eingesetzten zu reinigenden Sprühvorrichtung (2) liegt.8) Device according to claim 7, characterized in that the nozzle arrangement (6) is pivotable about an axis which is transverse to the longitudinal axis of the spray device to be cleaned (2). 9) Vorrichtung nach Anspruch 7 oder 8, dadurch gekenn­zeichnet, daß die Düsenanordnung (6) einen Träger mit mehre­ren darauf angeordneten Düsen enthält.9) Device according to claim 7 or 8, characterized in that the nozzle arrangement (6) contains a carrier with a plurality of nozzles arranged thereon. 10) Vorrichtung nach Anspruch 8 oder 9, dadurch gekenn­zeichnet, daß die Düsenanordnung (6) aus einem allgemein U-förmig oder annähernd halbkreisförmig gebogenen Bügel besteht, der um eine quer durch die beiden Bügelenden verlaufende Achse (7) schwenkbar gelagert ist und derart angeordnet ist, daß die Sprühvorrichtung (2) mit ihrem zu reinigenden Bereich in den Raum zwischen den beiden Bügel­schenkeln ragt.10) Device according to claim 8 or 9, characterized in that the nozzle arrangement (6) consists of a generally U-shaped or approximately semicircular curved bracket which is pivotally mounted about an axis extending transversely through the two bracket ends and arranged in such a way is that the spray device (2) protrudes with its area to be cleaned in the space between the two arm legs. 11) Vorrichtung nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, daß die Düsenanordnung (6) auf einer Welle (7) montiert ist, die von einer Antriebsvorrichtung (16) um einstellbare Winkelbeträge in steuerbare Richtungen drehbar und in eine definierte Ruhelage stellbar ist.11) Device according to one of claims 7 to 10, characterized in that the nozzle arrangement (6) is mounted on a shaft (7) which is rotatable by a drive device (16) by adjustable angular amounts in controllable directions and in a defined rest position . 12) Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Antriebsvorrichtung (16) pneumatisch gesteuert wird.12) Device according to claim 11, characterized in that the drive device (16) is controlled pneumatically. 13) Vorrichtung nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, daß der Innenraum (3) um eine verti­kale Achse wenigstens annähernd rotationssymmetrisch ist, und daß die Öffnung (4) an der Oberseite des Innenraums (3) im wesentlichen zentrisch zu der vertikalen Achse angeordnet ist.13) Device according to one of claims 7 to 12, characterized in that the interior (3) is at least approximately rotationally symmetrical about a vertical axis, and that the opening (4) at the top of the interior (3) is substantially centered on the vertical Axis is arranged. 14) Vorrichtung nach einem der Ansprüche 7 bis 13, dadurch gekennzeichnet, daß die Öffnung (4) des Innenraums (3) mit einer die Lage der eingesetzten Sprühvorrichtung (2) definierenden Abdichtvorrichtung (5) versehen ist, mit der bei eingesetzter Sprühvorrichtung (2) der Innenraum nach außen abdichtbar ist.14) Device according to one of claims 7 to 13, characterized in that the opening (4) of the interior (3) is provided with a sealing device (5) defining the position of the spray device (2) used, with the spray device (2 ) the interior can be sealed to the outside. 15) Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß durch die Abdichtvorrichtung (5) radiale und axiale Lage­abweichungen zwischen der zu reinigenden Sprühvorrichtung (2) und dem Behälter ausgleichbar sind.15) Device according to claim 14, characterized in that radial and axial positional deviations between the spraying device (2) to be cleaned and the container can be compensated for by the sealing device (5). 16) Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, daß die Abdichtvorrichtung einen in einer Aufnahme schwim­mend angeordneten Dichtring enthält.16) Device according to claim 15, characterized in that the sealing device contains a floating sealing ring arranged in a receptacle. 17) Vorrichtung nach einem der Ansprüche 7 bis 16, gekennzeichnet durch eine Einrichtung (10) zum Auffangen der verbrauchten Reinigungsflüssigkeit und einen vertikal unter­halb des Innenraums (3) befindlichen Sammelbehälter (20).17) Device according to one of claims 7 to 16, characterized by a device (10) for collecting the used cleaning liquid and a vertically below the interior (3) collecting container (20). 18) Vorrichtung nach Anspruch 17, dadurch gekennzeichnet, daß sich zwischen der Auffangeinrichtung (10) und dem Sammel­behälter (20) eine steuerbare Absperrvorrichtung (19) be­findet.18) Device according to claim 17, characterized in that there is a controllable shut-off device (19) between the collecting device (10) and the collecting container (20). 19) Vorrichtung nach einem der Ansprüche 7 bis 18, gekennzeichnet durch in dem Innenraum (3) angeordnete Luft­düsen (18) zum Trocknen der zu reinigenden Sprühvorrichtung (2).19) Device according to one of claims 7 to 18, characterized by air nozzles (18) arranged in the interior (3) for drying the spray device (2) to be cleaned.
EP89104211A 1988-03-16 1989-03-09 Process and device for cleaning spraying devices Expired - Lifetime EP0333040B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808801A DE3808801A1 (en) 1988-03-16 1988-03-16 METHOD AND DEVICE FOR CLEANING A SPRAYING DEVICE
DE3808801 1988-03-16

Publications (3)

Publication Number Publication Date
EP0333040A2 true EP0333040A2 (en) 1989-09-20
EP0333040A3 EP0333040A3 (en) 1990-07-25
EP0333040B1 EP0333040B1 (en) 1994-01-05

Family

ID=6349888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104211A Expired - Lifetime EP0333040B1 (en) 1988-03-16 1989-03-09 Process and device for cleaning spraying devices

Country Status (3)

Country Link
US (1) US4977911A (en)
EP (1) EP0333040B1 (en)
DE (2) DE3808801A1 (en)

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WO1997018903A1 (en) * 1995-11-17 1997-05-29 Crystal Cap Cleaners Inc. Method and apparatus for cleaning spray guns
US6418944B1 (en) 1996-11-18 2002-07-16 Kevin R. White Method and apparatus for cleaning spray guns
DE10129667A1 (en) * 2001-06-20 2003-01-02 Abb Patent Gmbh Paint pistol air cap cleaning arrangement has cover element with opening matching cap size, holder above opening holding paint pistol in cleaning position with cap in cleaning chamber
EP1367302A3 (en) * 2002-05-27 2004-04-14 Dürr Systems GmbH Sealing arrangement
WO2007004736A1 (en) * 2005-07-06 2007-01-11 Honda Motor Co., Ltd. Method of washing paint gun
EP1764157A2 (en) 2005-09-15 2007-03-21 Dürr Systems GmbH Component of a rotary atomizer
WO2009009282A3 (en) * 2006-12-21 2009-03-26 Illinois Tool Works Coating material dispensing apparatus
DE102007048248A1 (en) 2007-10-08 2009-05-14 Dürr Systems GmbH Robot with a cleaning device and associated operating method
US7628343B2 (en) 2006-08-08 2009-12-08 Illinois Tool Works Inc. Triggers for fluid applicators
US7665672B2 (en) 2004-01-16 2010-02-23 Illinois Tool Works Inc. Antistatic paint cup
US7744011B2 (en) 2004-01-16 2010-06-29 Illinois Tool Works Inc. Antistatic paint cup
US7757972B2 (en) 2004-06-03 2010-07-20 Illinois Tool Works Inc. Conversion adapter for a fluid supply assembly
US7766250B2 (en) 2004-06-01 2010-08-03 Illinois Tool Works Inc. Antistatic paint cup
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CN109772628A (en) * 2019-02-27 2019-05-21 上海外高桥造船有限公司 Safety-type spray robot
EP2056970B2 (en) † 2006-08-24 2019-12-25 Volkswagen Aktiengesellschaft Cleaning apparatus for sprayers, in particular spray guns, and method for cleaning a sprayer
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DE4129778A1 (en) * 1991-09-07 1992-07-09 Daimler Benz Ag Automatic cleaning device for painting robots - has encapsulated spray tank to clean complete working arm
WO1997018903A1 (en) * 1995-11-17 1997-05-29 Crystal Cap Cleaners Inc. Method and apparatus for cleaning spray guns
US6355114B1 (en) 1995-11-17 2002-03-12 Kevin R. White Method and apparatus for cleaning spray guns
US6418944B1 (en) 1996-11-18 2002-07-16 Kevin R. White Method and apparatus for cleaning spray guns
DE10129667A1 (en) * 2001-06-20 2003-01-02 Abb Patent Gmbh Paint pistol air cap cleaning arrangement has cover element with opening matching cap size, holder above opening holding paint pistol in cleaning position with cap in cleaning chamber
EP1367302A3 (en) * 2002-05-27 2004-04-14 Dürr Systems GmbH Sealing arrangement
DE10394135B4 (en) * 2003-02-21 2012-07-05 Philip Jessup Contactless sprayer cleaning device
US8196770B2 (en) 2004-01-16 2012-06-12 Illinois Tool Works Inc. Fluid supply assembly
US7665672B2 (en) 2004-01-16 2010-02-23 Illinois Tool Works Inc. Antistatic paint cup
US7744011B2 (en) 2004-01-16 2010-06-29 Illinois Tool Works Inc. Antistatic paint cup
US7753289B2 (en) 2004-01-16 2010-07-13 Illinois Tool Works Inc. Antistatic paint cup
US7766250B2 (en) 2004-06-01 2010-08-03 Illinois Tool Works Inc. Antistatic paint cup
US7757972B2 (en) 2004-06-03 2010-07-20 Illinois Tool Works Inc. Conversion adapter for a fluid supply assembly
US7874323B2 (en) 2004-06-10 2011-01-25 Illinois Tool Works, Inc. Fluid supply assembly
WO2007004736A1 (en) * 2005-07-06 2007-01-11 Honda Motor Co., Ltd. Method of washing paint gun
EP1764157A2 (en) 2005-09-15 2007-03-21 Dürr Systems GmbH Component of a rotary atomizer
US7785420B2 (en) 2006-08-01 2010-08-31 Hedson Technologies Ab Method for cleaning a spray gun
US7628343B2 (en) 2006-08-08 2009-12-08 Illinois Tool Works Inc. Triggers for fluid applicators
EP2056970B2 (en) † 2006-08-24 2019-12-25 Volkswagen Aktiengesellschaft Cleaning apparatus for sprayers, in particular spray guns, and method for cleaning a sprayer
US8104423B2 (en) 2006-12-21 2012-01-31 Illinois Tool Works Inc. Coating material dispensing apparatus and method
WO2009009282A3 (en) * 2006-12-21 2009-03-26 Illinois Tool Works Coating material dispensing apparatus
CN101687207B (en) * 2006-12-21 2013-07-17 伊利诺斯工具制品有限公司 Coating material dispensing apparatus
DE102007048248A1 (en) 2007-10-08 2009-05-14 Dürr Systems GmbH Robot with a cleaning device and associated operating method
US8726830B2 (en) 2007-10-08 2014-05-20 Dürr Systems GmbH Robot comprising a cleaning device and associated operating method
EP3012031A1 (en) 2007-10-08 2016-04-27 Dürr Systems GmbH Robot with a cleaning device and associated operating method
EP3012032A1 (en) 2007-10-08 2016-04-27 Dürr Systems GmbH Robot with a cleaning device and associated operating method
EP3245033B1 (en) 2015-01-13 2021-10-27 Luca Toncelli Programmable station and plant for the production of plates with chromatic effects
CN109772628A (en) * 2019-02-27 2019-05-21 上海外高桥造船有限公司 Safety-type spray robot

Also Published As

Publication number Publication date
DE3808801A1 (en) 1989-10-05
DE58906609D1 (en) 1994-02-17
EP0333040B1 (en) 1994-01-05
US4977911A (en) 1990-12-18
EP0333040A3 (en) 1990-07-25

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