EP0827781B1 - Rotary sprayer - Google Patents
Rotary sprayer Download PDFInfo
- Publication number
- EP0827781B1 EP0827781B1 EP97115078A EP97115078A EP0827781B1 EP 0827781 B1 EP0827781 B1 EP 0827781B1 EP 97115078 A EP97115078 A EP 97115078A EP 97115078 A EP97115078 A EP 97115078A EP 0827781 B1 EP0827781 B1 EP 0827781B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bell
- annular groove
- cleaning fluid
- spray
- rotary sprayer
- 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.)
- Expired - Lifetime
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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
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1092—Means for supplying shaping gas
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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
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Definitions
- the invention relates to a rotary atomizer for the application of paints by means of electrostatic internal or external charging with a spray bell with a front tear-off edge, with one arranged in a motor housing Drive motor, which housing supply lines for the supply of paint, Cleaning fluid and compressed air and at least one high-voltage connection receives, and with at least one intended for axial spraying spray nozzle for cleaning fluid, the the bell-side end of the housing is arranged according to the preamble of claim 1.
- a flushing device for cleaning the bell outer surface is in the DE 195 17 477 A1 has been proposed, which for a spray nozzle Cleaning provided cleaning fluid, preferably solvent, immediately is sprayed onto the outer surface of the bell.
- cleaning fluid preferably solvent
- a similar spray device for cleaning a bell atomizer is from the US5106025 become known.
- the cleaning fluid also becomes immediate sprayed onto the outer surface of the bell.
- the splash losses due to the ricochet part of the solvent from the outer surface of the bell is removed by a convex bell outer surface and minimized by a certain spray angle.
- the radial position of the at least one spray nozzle is according to the invention a slot opening in the rear facing the housing facing the Spray bell molded annular groove opposite, the at least a spray nozzle cooperates with the annular groove, via which annular groove the cleaning fluid reaches the outer surface of the bell and contaminants located there detaches and eliminates, and wherein the annular groove with at least a radial recess is provided, through which the cleaning fluid introduced into the annular groove reaches the outer surface of the bell.
- the sprayed cleaning fluid in the prior art only partially reaches the surface of the spray bell to be cleaned or spread over it as a film, while the rest is reflected and is not available for cleaning, forms the applied according to the invention Cleaning fluid a covering the entire outer surface of the spray bell Film that removes adhering paint residues due to its reactive properties rinsed off the outer surface of the bell.
- the annular groove via at least one on the groove base arranged radial bore with the bell outer surface in terms of flow connected, with six designed as bores or as slots radial or also the involute-like or following the direction of rotation of the bell tangential through openings the best effect is achieved.
- the annular groove is parallel to the outer wall of the bell molded into the back of the bell, the annular groove advantageously being conical Has groove flanks.
- annular groove at an angle between 10 ° and 30 °, preferably 20 °, inclined in relation to the central axis of the spray bell the back of the bell is molded.
- the spray nozzle for the cleaning fluid at a short distance from Spray bell arranged.
- the distance between the spray nozzle is preferably for the cleaning fluid and the back of the spray bell at most 2 mm.
- Fig. 1 is a rotary atomizer 10 with a drive 12 and with a front Spray bell 14 and arranged concentrically around the drive 12 High-voltage electrodes 16 and one feeding the high-voltage electrodes 16 High voltage connection line 18 shown.
- the high voltage electrodes 16 are fastened radially to a housing 20 which has a drive 12 forming engine, preferably compressed air turbine engine.
- a shaft 22 for driving the spray bell 14 is brought out and a spray nozzle 24 for supplying the spray bell 14 with cleaning fluid.
- annular groove 26 is formed parallel to the outer surface 28 of the spray bell 14, at the bottom of the groove there are recesses 30 which provide a flow connection form to the outer surface 28.
- the spray nozzle 24 and the annular groove 26 with the recesses 30 form the cleaning device according to the invention for the removal of impurities and color residues on the surface 28 of the spray bell 14.
- the relevant spray bell 14 is cleaned. Both the inner colorant paths and the front end face cleaned as well as the outer surface of the spray bell 14, on which Colorant residues and other impurities can accumulate.
- cleaning fluid for example solvent
- the spray nozzle 24 possibly enriched with compressed air, supplied and arrives due to the strict geometric assignment of the ring channel 26 to the radial position of the Spray nozzle 24 without loss into the annular groove 26, from where the cleaning fluid due to centrifugal force flows to the base of the groove radially further outside and through the The recesses 30 provided there reach the lateral surface 28.
- the recesses 30 can be radial bores or slots. You can but also involute-like, i.e. following an involute, or tangential in each case according to the direction of rotation through the existing outer wall his.
- the cleaning fluid spreads evenly over the circumferential surface and thereby the on the The surface of any accumulated impurities first dissolves and then peels off and due to the centrifugal flow leads to one at the Front end of the spray bell located tear-off edge 29, on which in the paint spraying operation the relevant colorant and in the so-called rinsing mode the relevant Detergent or cleaning fluid is thrown off.
Description
Die Erfindung betrifft einen Rotationszerstäuber für das Auftragen von Anstrichstoffen mittels elektrostatischer Innen- oder Außenaufladung mit einer Sprühglocke mit einer stirnseitigen Abrißkante, mit einem in einem Motorgehäuse angeordneten Antriebsmotor, welches Gehäuse Versorgungsleitungen für die Zufuhr von Anstrichstoff, Reinigungsfluid und Druckluft sowie wenigstens einen Hochspannungsanschluß aufnimmt, und mit wenigstens einer zum axialen Sprühen vorgesehenen Sprühdüse fur Reinigungsfluid, die an der glockenseitigen Stirnseite des Gehäuses angeordnet ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a rotary atomizer for the application of paints by means of electrostatic internal or external charging with a spray bell with a front tear-off edge, with one arranged in a motor housing Drive motor, which housing supply lines for the supply of paint, Cleaning fluid and compressed air and at least one high-voltage connection receives, and with at least one intended for axial spraying spray nozzle for cleaning fluid, the the bell-side end of the housing is arranged according to the preamble of claim 1.
Es ist bekannt, daß bei den zum Auftragen von Anstrichstoffen, zum Beispiel von elektrisch leitfähigen wasserlöslichen Lacken, mittels elektrostatischem Beschichten verwendeten Rotationssprühzerstäubern, die mit hoher Drehzahl rotierenden Sprühglocken auf ihrer dem Antriebsmotor zugewandten rückwärtigen Außenfläche verschmutzen, das heißt mit Farbresten und sonstigen Verunreinigungen bedeckt sind.It is known that in the application of paints, for example electrically conductive water-soluble paints, by means of electrostatic coating used rotary spray atomizers that rotate at high speed Spray bells on their rear outer surface facing the drive motor soiling, that is covered with paint residues and other impurities are.
Da solche Verunreinigungen sich nachteilig auf den Betrieb der Sprühvorrichtung sowie auf das hiermit erzielte Arbeitsergebnis auswirken, muß dafür gesorgt werden, daß die Glockenaußenfläche beim bestimmungsgemäßen Farbauftrag stets frei von Verunreinigungen ist.Because such contaminants adversely affect the operation of the sprayer as well as affect the result of work achieved with this, care must be taken that the outer surface of the bell always applies when the paint is used as intended is free of impurities.
Eine Spülvorrichtung zur Reinigung der Glockenaußenfläche ist in der DE 195 17 477 A1 vorgeschlagen worden, wobei durch eine Spritzdüse das zur Reinigung vorgesehene Reinigungsfluid, vorzugsweise Lösungsmittel, unmittelbar auf die Glockenaußenfläche aufgespritzt wird. Dabei hat sich allerdings gezeigt, daß ein nicht unbeträchtlicher Teil des Lösungsmittels abprallt und demgemäß nicht zur Reinigung der Glockenaußenfläche zur Verfügung steht, so daß ein erheblicher Verbrauch an entsorgungspflichtigem Reinigungsfluid resultiert.A flushing device for cleaning the bell outer surface is in the DE 195 17 477 A1 has been proposed, which for a spray nozzle Cleaning provided cleaning fluid, preferably solvent, immediately is sprayed onto the outer surface of the bell. However, it has been shown that a not inconsiderable part of the solvent bounces off and accordingly not is available for cleaning the bell outer surface, so that a considerable Consumption of cleaning fluid requiring disposal results.
Eine ähnliche Sprühvorrichtung zur Reinigung eines Glockenzerstäubers ist aus der US5106025 bekannt geworden. Hier wird das Reinigungsfluid ebenfalls unmittelbar auf die Glockenaußenfläche aufgespritzt. Die Spritzverluste durch das Abprallen eines Teils des Lösungsmittels von der Glockenaußenfläche, werden durch eine konvexe Glockenaußenfläche sowie durch einen bestimmten Aufspritzwinkel minimiert.A similar spray device for cleaning a bell atomizer is from the US5106025 become known. Here the cleaning fluid also becomes immediate sprayed onto the outer surface of the bell. The splash losses due to the ricochet part of the solvent from the outer surface of the bell is removed by a convex bell outer surface and minimized by a certain spray angle.
Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine Spülvorrichtung der eingangs genannten Art anzugeben, welche auf konstruktiv einfache Weise einen sparsamen Verbrauch an Reinigungsfluid bei gleichzeitig guter Reinigung der Glockenaußenfläche ermöglicht.Starting from this prior art, it is an object of the invention to provide a rinsing device of the type mentioned at the beginning, which in a structurally simple Way an economical consumption of cleaning fluid with good at the same time Allows cleaning of the bell outer surface.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the characterizing features of Claim 1 solved.
Demgemäß liegt erfindungsgemäß die radiale Position der wenigstens einen Sprühdüse einer Nutöffnung einer in die dem Gehäuse zugewandten rückseitigen Stirnseite der Sprühglocke eingeformten Ringnut gegenüber, wobei die wenigstens eine Sprühdüse mit der Ringnut zusammenarbeitet, über welche Ringnut das Reinigungsfluid an die Glockenaußenfläche gelangt und dort befindliche Verunreinigungen ablöst und beseitigt, und wobei die Ringnut mit wenigstens einer radialen Ausnehmung versehen ist, durch welche das in die Ringnut eingebrachte Reinigungsfluid an die Glockenaußenfläche gelangt.Accordingly, the radial position of the at least one spray nozzle is according to the invention a slot opening in the rear facing the housing facing the Spray bell molded annular groove opposite, the at least a spray nozzle cooperates with the annular groove, via which annular groove the cleaning fluid reaches the outer surface of the bell and contaminants located there detaches and eliminates, and wherein the annular groove with at least a radial recess is provided, through which the cleaning fluid introduced into the annular groove reaches the outer surface of the bell.
Während, wie zuvor ausgeführt, im Stand der Technik das aufgesprühte Reinigungsfluid nur zum Teil die zu reinigende Oberfläche der Sprühglocke erreicht beziehungsweise sich darauf als Film verteilt, während der Rest reflektiert wird und zur Reinigung nicht zur Verfügung steht, bildet das erfindungsgemäß aufgebrachte Reinigungsfluid einen die gesamte Außenfläche der Sprühglocke bedeckenden Film, der aufgrund seiner reaktiven Eigenschaften anhaftende Farbreste ablöst und von der Glockenaußenfläche abspült. While, as previously stated, the sprayed cleaning fluid in the prior art only partially reaches the surface of the spray bell to be cleaned or spread over it as a film, while the rest is reflected and is not available for cleaning, forms the applied according to the invention Cleaning fluid a covering the entire outer surface of the spray bell Film that removes adhering paint residues due to its reactive properties rinsed off the outer surface of the bell.
Dabei ist entsprechend einer bevorzugten Ausführungsform der Erfindung die Ringnut über wenigstens eine am Nutgrund angeordnete radiale Bohrung mit der Glockenaußenfläche strömungsmäßig verbunden, wobei mit sechs als Bohrungen oder als Schlitze ausgebildeten radialen oder auch der Drehrichtung der Glocke folgenden evolventenartigen beziehungsweise tangentialen Durchgangsöffnungen die beste Wirkung erzielt wird.Here is a preferred Embodiment of the invention, the annular groove via at least one on the groove base arranged radial bore with the bell outer surface in terms of flow connected, with six designed as bores or as slots radial or also the involute-like or following the direction of rotation of the bell tangential through openings the best effect is achieved.
Hierdurch wird erreicht, daß das nach außen gelangende Reinigungsfluid sich filmartig auf der Glockenaußenfläche ausbreitet, wobei das auf der Glockenaußenfläche befindliche Reinigungsfluid mitsamt aufgenommener Verunreinigungen an die frontseitige Abrißkante der Sprühglocke strömt und dort fliehkraftbedingt die Sprühglocke verläßt.This ensures that the cleaning fluid escaping to the outside becomes spreads like a film on the outer surface of the bell, this on the outer surface of the bell cleaning fluid with all the contaminants it contains the front tear-off edge of the spray bell flows and there the centrifugal force Spray bell leaves.
In weiterer Ausgestaltung der Erfindung ist die Ringnut parallel zur Glockenaußenwand in die Glockenrückseite eingeformt, wobei vorteilhafterweise die Ringnut konische Nutflanken aufweist.In a further embodiment of the invention, the annular groove is parallel to the outer wall of the bell molded into the back of the bell, the annular groove advantageously being conical Has groove flanks.
Ferner kann es vorteilhaft sein, daß die Ringnut unter einem Winkel zwischen 10° und 30°, vorzugsweise 20°, gegenüber der Mittelachse der Sprühglocke geneigt in die Glockenrückseite eingeformt ist.It may also be advantageous that the annular groove at an angle between 10 ° and 30 °, preferably 20 °, inclined in relation to the central axis of the spray bell the back of the bell is molded.
Um eine einwandfreie Funktion der erfindungsgemäßen Reinigungsvorrichtung sicherzustellen, ist die Spritzdüse für das Reinigungsfluid in geringem Abstand zur Sprühglocke angeordnet. Vorzugsweise beträgt der Abstand zwischen der Spritzdüse für das Reinigungsfluid und der Rückseite der Sprühglocke höchstens 2 mm.In order to ensure that the cleaning device according to the invention functions properly, is the spray nozzle for the cleaning fluid at a short distance from Spray bell arranged. The distance between the spray nozzle is preferably for the cleaning fluid and the back of the spray bell at most 2 mm.
Gemäß einer alternativen, nicht weniger vorteilhaften Alternative kann vorgesehen sein, daß die Spritzdüse für das Reinigungsfluid in die Ringnut eintaucht.According to an alternative, no less advantageous alternative can be provided be that the spray nozzle for the cleaning fluid dips into the annular groove.
In beiden Ausführungsvarianten ist gewährleistet, daß die aus der Spritzdüse austretende Menge an Reinigungsfluid komplett in die Ringnut einströmt und damit für die Oberflächenreinigung zur Verfügung steht. In both variants it is ensured that the one emerging from the spray nozzle Amount of cleaning fluid flows completely into the ring groove and thus for surface cleaning is available.
Diese und weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind Gegenstand der Unteransprüche.These and other advantageous refinements and improvements of the invention are the subject of the subclaims.
Anhand eines in der schematischen Zeichnung dargestellten Ausführungsbeispiels
sollen die Erfindung, vorteilhafte Ausgestaltungen und Verbesserungen sowie besondere
Vorteile der Erfindung näher erläutert und beschrieben werden.
Es zeigen:
- Fig. 1
- eine Seitenansicht eines Rotationszerstäubers mit Elektroden für die Außenaufladung mit einer erfindungsgemäßen Sprühglocke und
- Fig. 2
- eine erfindungsgemäße Sprühglocke im Längsschnitt mit dem anschließenden Motorgehäuse in Teildarstellung.
Show it:
- Fig. 1
- a side view of a rotary atomizer with electrodes for external charging with a spray bell and
- Fig. 2
- a spray bell according to the invention in longitudinal section with the subsequent motor housing in partial representation.
In Fig. 1 ist ein Rotationszerstäuber 10 mit einem Antrieb 12 und mit einer frontseitigen
Sprühglocke 14 sowie mit konzentrisch um den Antrieb 12 angeordneten
Hochspannungselektroden 16 und einer die Hochspannungselektroden 16 speisenden
Hochspannungsverbindungsleitung 18 gezeigt. Die Hochspannungselektroden
16 sind radial an einem Gehäuse 20 befestigt, welches einen den Antrieb 12
bildenden Motor, vorzugsweise Druckluft-Turbinenmotor, aufnimmt.In Fig. 1 is a
An der zur Sprühglocke 14 weisenden Stirnseite des Gehäuses 20 ist, wie aus Fig.
2 ersichtlich, eine Welle 22 zum Antrieb der Sprühglocke 14 herausgeführt sowie
eine Spritzdüse 24 zur Beaufschlagung der Sprühglocke 14 mit Reinigungsfluid.On the end face of the
Erfindungsgemäß ist an der dem Gehäuse 20 zugewandten Rückseite der Sprühglocke
14 eine Ringnut 26 parallel zur Außenfläche 28 der Sprühglocke 14 eingeformt,
an deren Nutgrund Ausnehmungen 30 vorgesehen sind, welche eine Strömungsverbindung
zur Außenfläche 28 bilden. Die Spritzdüse 24 und die Ringnut 26
mit den Ausnehmungen 30 bilden die erfindungsgemäße Reinigungseinrichtung für
die Beseitigung von Verunreinigungen und Farbrückständen auf der Mantelfläche
28 der Sprühglocke 14.According to the invention is on the rear side of the spray bell facing the
Die Wirkungsweise dieser Reinigungseinrichtung wird nachstehend erläutert. The operation of this cleaning device is explained below.
Sobald ein Beschichtungszyklus, zum Beispiel das Lackieren einer Fahrzeugkarosserie,
welches ein bevorzugtes Anwendungsgebiet der vorliegenden Erfindung darstellt,
abgeschlossen ist, erfolgt die Reinigung der betreffenden Sprühglocke 14.
Dabei werden sowohl die innenliegenden Farbmittelwege und die frontseitige Stirnfläche
gereinigt als auch die Mantelfläche der Sprühglocke 14, auf welcher sich
Farbmittelreste und sonstige Verunreinigungen anlagern können.As soon as a coating cycle, for example painting a vehicle body,
which represents a preferred field of application of the present invention,
is completed, the
Hierzu wird über die Spritzdüse 24 Reinigungsfluid, zum Beispiel Lösungmittel, das
gegebenenfalls mit Druckluft angereichert ist, zugeführt und gelangt aufgrund der
strengen geometrischen Zuordnung des Ringkanals 26 zur radialen Position der
Spritzdüse 24 verlustfrei in die Ringnut 26, von wo aus das Reinigungsfluid fliehkraftbedingt
zum radial weiter außerhalb befindlichen Nutgrund fließt und durch die
dort vorgesehenen Ausnehmungen 30 an die Mantelfläche 28 gelangt.For this purpose, cleaning fluid, for example solvent, is applied via the spray nozzle 24
possibly enriched with compressed air, supplied and arrives due to the
strict geometric assignment of the ring channel 26 to the radial position of the
Spray nozzle 24 without loss into the annular groove 26, from where the cleaning fluid due to centrifugal force
flows to the base of the groove radially further outside and through the
The
Die Ausnehmungen 30 können radiale Bohrungen oder Schlitze sein. Sie können
aber auch evolventenartig, das heißt einer Evolvente folgend, oder tangential jeweils
der Drehrichtung entsprechend durch die vorhandene Außenwandung geführt
sein.The
Aufgrund dieser Anordnung wird erfindungsgemäß erreicht, daß das Reinigungsfluid
sich gleichmäßig über die Mantelfläche ausbreitet und hierbei die auf der
Mantelfläche eventuell angelagerten Verunreinigungen zunächst anlöst und dann
ablöst und infolge der fliehkraftbedingten Strömung mit sich führt bis zu einer an der
Stirnseite der Sprühglocke befindlichen Abrißkante 29, an welcher im Farbsprühbetrieb
das betreffende Farbmittel und im sogenannten Spülbetrieb das betreffende
Spülmittel beziehungsweise Reinigungsfluid abgeschleudert wird.Because of this arrangement it is achieved according to the invention that the cleaning fluid
spreads evenly over the circumferential surface and thereby the on the
The surface of any accumulated impurities first dissolves and then
peels off and due to the centrifugal flow leads to one at the
Front end of the spray bell located tear-off
Während bei den bisher bekannten Verfahrensweisen zur Reinigung der Außenfläche
infolge des direkten strahlförmigen Auftreffens des Reinigungsmittels auf die
Glockenaußenfläche Zerstäubungen resultieren, bei denen aufgenommene Farb
reste und Verunreinigungen mitgerissen werden, die sich anschließend unkontrolliert,
insbesondere bei der Außenaufladung, am Antriebsgehäuse 20 anlagern und
so zu Störungen führen können, wird mit Hilfe der erfindungsgemäßen Gestaltung
der Sprühglocke 14 zum Zwecke der Außenreinigung der Sprühglocke 14 eine
gleichbleibende Säuberung der Außenfläche 28 der Sprühglocke 14 ohne störende
Nebeneffekte erreicht.While in the previously known procedures for cleaning the outer surface
due to the direct jet impact of the cleaning agent on the
Bell outer surface atomizations result in which absorbed paint
residues and impurities are entrained, which subsequently become uncontrolled,
in particular for external charging, attach to the
Claims (11)
- Rotary sprayer for applying coating materials by means of electrostatic internal or external charging, with a spray bell (14) with a breakaway edge (29) on the end face, driven by a drive motor arranged in a housing (20), which housing (20) receives supply lines for the feeding in of coating material, cleaning fluid and compressed air and also at least one high-voltage connection, and with at least one spray nozzle (24) for cleaning fluid, which is intended for axial spraying and is arranged on the bell-side end face of the housing (20), characterized in that the radial position of the at least one spray nozzle (24) lies opposite a groove opening of an annular groove (26) formed in the rear end face of the spray bell (14), facing the housing (20), the at least one spray nozzle (24) working together with the annular groove (26), via which annular groove (26) the cleaning fluid reaches the outer face (28) of the bell and detaches and removes contaminants located there, and in that the annular groove (26) is provided with at least one radial clearance (30), through which the cleaning fluid introduced into the annular groove (26) reaches the outer face (28) of the bell.
- Rotary sprayer according to Claim 1, characterized in that the annular groove (26) is connected in flow terms to the outer face (28) of the bell via at least one radial bore (30) arranged on the base of the groove.
- Rotary sprayer according to Claim 1 or 2, characterized in that six radial clearances (30), formed as bores or as slots, connect the annular channel (26) in flow terms to the outer face (28) of the bell.
- Rotary sprayer according to one of the preceding claims, characterized in that the annular groove (26) is formed in the rear side of the bell parallel to the outer face (28) of the bell.
- Rotary sprayer according to one of the preceding claims, characterized in that the distance between the spray nozzle (24) for the cleaning fluid and the rear side of the spray bell (14) is at most 2 mm.
- Rotary sprayer according to one of Claims 1 to 4, characterized in that the spray nozzle (24) for the cleaning fluid enters the annular groove (26).
- Rotary sprayer according to one of the preceding claims, characterized in that the amount of cleaning fluid emanating from the spray nozzle (24) completely flows into the annular groove (26).
- Rotary sprayer according to one of the preceding claims, characterized in that the cleaning fluid reaching the outside from the annular groove (26) through the at least one radial clearance (30) spreads out in the manner of a film on the outer face (28) of the bell.
- Rotary sprayer according to one of the preceding claims, characterized in that the cleaning fluid located on the outer face (28) of the bell flows together with picked-up contaminants to the breakaway edge (29), where it leaves the spray bell (14) as a result of centrifugal force.
- Rotary sprayer according to one of the preceding claims, characterized in that the annular groove (26) has conical groove flanks.
- Rotary sprayer according to one of the preceding claims, characterized in that the annular groove (26) is formed in the rear side of the bell inclined at an angle of between 10° and 30°, preferably 20°, with respect to the centre axis of the spray bell (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19636159A DE19636159A1 (en) | 1996-09-06 | 1996-09-06 | Rotary atomizer |
| DE19636159 | 1996-09-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0827781A2 EP0827781A2 (en) | 1998-03-11 |
| EP0827781A3 EP0827781A3 (en) | 1998-09-16 |
| EP0827781B1 true EP0827781B1 (en) | 2002-11-06 |
Family
ID=7804779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97115078A Expired - Lifetime EP0827781B1 (en) | 1996-09-06 | 1997-09-01 | Rotary sprayer |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0827781B1 (en) |
| DE (2) | DE19636159A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10101369A1 (en) | 2001-01-13 | 2002-07-18 | Itw Oberflaechentechnik Gmbh | Spraying method and spraying device for coating liquid |
| DE10101372A1 (en) | 2001-01-13 | 2002-08-01 | Itw Oberflaechentechnik Gmbh | Spraying method and spraying device for coating liquid |
| DE10101367A1 (en) * | 2001-01-13 | 2002-08-01 | Itw Oberflaechentechnik Gmbh | Spraying method and spraying device for coating liquid |
| ATE385072T1 (en) | 2001-02-24 | 2008-02-15 | Marquardt Gmbh | DEVICE FOR ROTATION ANGLE ADJUSTMENT |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8607841U1 (en) * | 1986-03-21 | 1986-05-15 | Behr-Industrieanlagen GmbH & Co, 7121 Ingersheim | Device for atomizing liquid paint, in particular paint atomizer |
| DE3912700C1 (en) * | 1989-04-18 | 1990-10-11 | Ransburg-Gema Gmbh, 6056 Heusenstamm, De | Rotary spray coater - has atomiser ring with solvent channels, and includes annular air inlets |
| FR2652518B1 (en) * | 1989-10-03 | 1994-04-08 | Sames Sa | DEVICE FOR PROJECTING A COATING PRODUCT WITH A ROTATING SPRAYING MEMBER. |
| DE4201379A1 (en) * | 1992-01-20 | 1993-07-22 | Baral Karl Heinz | Cleaner for atomiser orifices of paint spray gun - directs alternate blasts of air and solvent through orifices |
| DE9419641U1 (en) * | 1994-12-07 | 1995-02-02 | Duerr Gmbh & Co | Rotary atomizer with a bell body |
| DE19506969A1 (en) * | 1995-02-13 | 1996-08-14 | Ind Lackieranlagen Schmidt Gmb | Fine atomiser for paint or lacquer |
| DE19517477A1 (en) * | 1995-05-12 | 1996-11-14 | Abb Patent Gmbh | Air-turbine-driven rotary atomiser with built-in rinsing device |
-
1996
- 1996-09-06 DE DE19636159A patent/DE19636159A1/en not_active Withdrawn
-
1997
- 1997-09-01 DE DE59708656T patent/DE59708656D1/en not_active Expired - Lifetime
- 1997-09-01 EP EP97115078A patent/EP0827781B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE19636159A1 (en) | 1998-03-12 |
| DE59708656D1 (en) | 2002-12-12 |
| EP0827781A3 (en) | 1998-09-16 |
| EP0827781A2 (en) | 1998-03-11 |
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