EP1745854B1 - Coating device - Google Patents

Coating device Download PDF

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Publication number
EP1745854B1
EP1745854B1 EP06014517A EP06014517A EP1745854B1 EP 1745854 B1 EP1745854 B1 EP 1745854B1 EP 06014517 A EP06014517 A EP 06014517A EP 06014517 A EP06014517 A EP 06014517A EP 1745854 B1 EP1745854 B1 EP 1745854B1
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EP
European Patent Office
Prior art keywords
air
accordance
air cap
extension pipe
cap
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EP06014517A
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German (de)
French (fr)
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EP1745854A1 (en
Inventor
Guido Zimmermann
Elmar Krayer
Alfred Göhring
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J Wagner GmbH
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J Wagner GmbH
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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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • 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
    • B05B15/60—Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits
    • B05B15/652—Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits whereby the jet can be oriented
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
    • B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
    • B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet

Definitions

  • the invention relates to a device for applying paint or other liquid media to hard-to-reach surfaces, such as for coating the radiators of a radiator, consisting of a spray gun for conveying the paint or the liquid, with this releasably connected extension tube, in the free end of which is actuated by means of a nozzle needle nozzle, and a removably mounted on the extension tube air cap, through which an air supplied through the extension tube is supplied to the jet emerging from the nozzle spray jet.
  • the DE 585 239 A spray gun can be removed for painting hard-to-reach objects.
  • a certain amount of the air flow is deflected by the housing, namely in a through hole in the direction of the outlet opening of the nozzle, so that is directed by this proportion of the air flow of the spray jet in the direction of the surfaces to be coated. Therefore is, and this is to be regarded as particularly disadvantageous, made the mixing of the air flow with the paint spray jet outside the nozzle.
  • the air flow is namely deflected by the bore and impinges outside of the nozzle on the there emerging paint spray.
  • radiator nozzles devices of the type mentioned by the company J. Wagner GmbH in 88677 Markdorf under the name "Finecoat radiator nozzle RN30
  • the spray jet can be adjusted by rotating the extension tube at short notice to the respective object, but since in the known device in the air caps always only one air duct is provided and thus only one air flow is available for deflecting the spray jet, the The spray jet fills, namely, since it is not trapped by the air flow, already after a short distance, so that in many cases a diffuse spray pattern and thus an uneven coating is given.
  • the spray jet on the object to be coated gives a relatively small spray pattern, so that the time required to coat gap-shaped structures, such as radiator fins, is sometimes considerable.
  • the object of the invention is therefore to provide an applicator device of the aforementioned type, by means of which not only to achieve a large area and a uniform spray pattern and thus a quick spraying of surfaces is possible, but it is mainly a mixing of the air flow and the Spray jet within the spray gun to avoid contamination in the area of the outlet opening of the nozzle of the spray gun.
  • an applicator device of the aforementioned type characterized in that the air stream acting on the spray jet is divided into two or more partial air streams by two or more separate air ducts are provided in the air cap, the height of the nozzle and on the This facing side are designed to be open and that deflected by means of an angled arranged in the region of the nozzle baffle the partial air streams in the direction of the spray jet and this is surrounded by the partial air streams approximately semicircular.
  • the air cap is snapped onto the extension tube or directly on the spray gun or a connected thereto intermediate member.
  • the air cap is the Vecinrungsrohr or an intermediate member of the spray gun with a circumferential locking groove and the air cap to be provided with at least one radially elastically deformable tab which engages with a locking projection in the locking groove of the extension tube or the intermediate member.
  • the air cap on the extension tube or the intermediate member is to be incorporated in the free end of an open longitudinal slot and the air cap is provided with a protruding over a stop rib, which engages for locking the air cap in the longitudinal slot of the extension tube or the intermediate member , wherein the stop of the air cap can be formed by one or more arranged on the inner circumferential surface longitudinal ribs, whose the Extension tube or the intermediate member associated plant surfaces should be matched to the incorporated in this circumferential groove and the tab.
  • ribs projecting radially inwards from the air cap, the extension tube and / or the intermediate member, preferably the ribs provided for the position-oriented locking of the air cap.
  • the air cap is equipped according to the invention with two or more tuftleitkanälen, then act when spraying paint or other medium on the spray jet from the side of two or more air streams, so that the spray jet is about semicircular enveloped by the air currents and only slightly in the open area fan out.
  • a large-area spray pattern with an oval in the projection surface is produced on the object to be coated, so that coatings are made in a much shorter time than with the known radiator nozzles.
  • it is advantageous that a uniform coating can be achieved by the guidance of the spray jet.
  • An additional construction effort is to accomplish this, not required, in the air cap only two or more separate air ducts are incorporated or spatialformen. With the aid of the cross-sectional areas through which the respective quantities of air flowing through are determined, the spray jet can be more or less influenced.
  • extension tube or the spray gun and / or the intermediate member and the air cap are provided with associated markings and the extension tube or the intermediate member, preferably in the region of the spray gun associated end, a radially projecting projection, for example in the form of a longitudinal rib, whose position is matched to the air ducts.
  • the air cap on the extension tube or the spray gun or an associated intermediate song it is possible to mount them position-oriented in a short time and also to decrease, without this being affected by the material to be processed. Namely, the material to be processed can not reach the components effecting the latching connection. Also, the assembly of the air cap by the provided markings and their orientation to the respective surface to be machined by the molded projection are greatly facilitated, so that with ease of handling a reliable and trouble-free operation over a long period are given.
  • FIG. 1 illustrated and designated 1 device is used to apply paint or similar liquid media to hard to reach areas, such as the radiators 2 of a radiator on which by means of a spray jet 3, a coating 4 is applied, and consists essentially of a spray gun 11th , an extension tube 12 held rotatably and releasably thereon for easy access to the radiators 2, and an air cap 16 arranged on the extension tube 12, from which the spray jet 3 exits laterally deflected.
  • the VeriDeutsch ceremoniessrohr 12 is in this case held by means of a screw-on the spray gun 11 union nut 13 and has a nozzle 14 which is actuated by means of a nozzle needle 15.
  • an air stream 5 is provided, which is supplied via an air duct 20, which is directed onto the spray jet 3, through an air duct 20 provided between the expansion pipe 12 and a pipe 18 inserted therein. Furthermore, the medium to be atomized flows to the nozzle 15 through a channel 19 formed between the nozzle needle 15 and the tube 18.
  • 16 two air ducts 21 and 22 are incorporated in the air cap, whose cross-sectional areas formed oval are and whose longitudinal axes a and a 'are inclined at an angle ⁇ of about 90 ° to each other.
  • the air ducts 21, 22 designed on the side facing this open.
  • two air flow streams 6 and 7 emerge from the air cap 16, which impinge on an angularly projecting baffle 17 formed on the air cap 16 and are deflected by the latter in the direction of the spray jet 3.
  • the air streams 6 and 7 thus wrap the spray jet 3 approximately circularly and deflect it at an angle which can be influenced by the inclination of the baffle 17 laterally, so that the radiators 2 located laterally next to the extension tube 12 cover a large area and uniformly with the coating 4 can be provided.
  • end surfaces 17 "of the baffle 17 and 17 ' extend parallel to the longitudinal axes a, a' and b, b ', b" of the air ducts 21, 22 and 21', 22 'and 22 "respectively.
  • the air cap 16 is, as in particular the FIG. 3 can be seen, orientation oriented latched on the extension tube 12.
  • a circumferential locking groove 31 is incorporated in the extension tube 12 and the air cap 16 has a plurality of circumferentially evenly distributed elastically deformable tabs 32 which engage in the locking groove 31 by means of protruding locking lugs 33.
  • the tabs 32 are in the embodiment shown, as in particular the FIG. 4 can be seen formed by incorporated in the air cap 16 U-shaped slots 32 '.
  • ribs 34 and 36 and 36 ' are provided which serve to guide the nozzle 14 and allow the position-oriented orientation of the air cap 16.
  • the rib 34 is dimensioned larger in its axial extent than the ribs 36 and 36 '.
  • a longitudinal slot 37 is incorporated into the extension tube 12, in which the latched air cap 12 - as in FIG. 3 is shown - engages with the rib 34.
  • 16 arrow-like associated markings 38 and 39 are mounted on this and the air cap.
  • the air cap 12 can thus be aligned accordingly when plugging onto the extension tube 12.
  • a projection 40 in the form of a longitudinal rib which is aligned with the position of the air guide channels 21, 22 or 21 ', 22' and 22 '", is attached to the end of the extension tube 12 facing the spray gun 11.
  • the union nut 13 is released , the extension tube 12 can be easily rotated by means of the projection 40 according to the operation to be performed in order to For example, to coat at a rotation of 180 ° opposite radiators of a radiator.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Auftragen von Farbe oder anderen flüssigen Medien auf schwer zugängliche Flächen, wie zum Beispiel zum Beschichten der Radiatoren eines Heizkörpers, bestehend aus einer Spritzpistole zur Förderung der Farbe oder der Flüssigkeit, einem mit dieser lösbar verbundenen Verlängerungsrohr, in dessen freies Ende eine mittels einer Düsennadel betätigbare Düse eingesetzt ist, und einer an dem Verlängerungsrohr abnehmbar angebrachten Luftkappe, durch die ein durch das Verlängerungsrohr zugeführter Luftstrom dem aus der Düse austretenden Spritzstrahl zugeleitet ist.The invention relates to a device for applying paint or other liquid media to hard-to-reach surfaces, such as for coating the radiators of a radiator, consisting of a spray gun for conveying the paint or the liquid, with this releasably connected extension tube, in the free end of which is actuated by means of a nozzle needle nozzle, and a removably mounted on the extension tube air cap, through which an air supplied through the extension tube is supplied to the jet emerging from the nozzle spray jet.

Aus der US 2 610 092 ist eine Auftragsvorrichtung dieser Art bekannt. In einer Düseneinrichtung sind hierbei Kanäle zur Zuführung von Druckluft eingearbeitet, durch die der austretende Flüssigkeitsstrahl abgelenkt wird. Die Düseneinrichtung ist mittels eines mit einem Gewinde versehenen Schließringes an der Spritzpistole befestigt. Das Entfernen der Düseneinrichtung ist somit aufwendig, weil hierzu erst der Schließring abgeschraubt werden muss.From the US 2 610 092 An application device of this type is known. In a nozzle device in this case channels for supplying compressed air are incorporated, through which the exiting liquid jet is deflected. The nozzle device is attached to the spray gun by means of a threaded locking ring. The removal of the nozzle device is therefore complicated, because this only the locking ring must be unscrewed.

Auch der DE 585 239 kann eine Spritzpistole zum Anstreichen von schwer zugänglichen Gegenständen entnommen werden. Die Luftleitkanäle, durch die der Luftstrom in Richtung der Austrittsöffnung der Düse geführt ist, Ummantelt den aus der Düse austretenden Spritzstrahl nahezu vollständig. Ein bestimmter Betrag des Luftstromes wird durch das Gehäuse, nämlich in einer Durchgangsbohrung in Richtung auf die Austrittsöffnung der Düse umgelenkt, so dass durch diesen Anteil des Luftstromes der Spritzstrahl in Richtung der zu beschichtenden Oberflächen gelenkt wird. Demnach wird, und dies ist als besonders nachteilig anzusehen, die Vermischung des Luftstromes mit dem Farbspritzstrahl außerhalb der Düse vorgenommen. Der Luftstrom wird nämlich durch die Bohrung umgelenkt und trifft außerhalb der Düse auf den dort austretenden Farbspritzstrahl auf. Somit entstehen aufgrund der Vermischung außerhalb der Spritzpistole Farbverschmutzungen, Farbablagerungen und sonstige unerwünschte Nebeleffekte durch die unzuverlässige und ungenaue Vermischung des Luftstromes mit dem Farbspritzstrahl.Also the DE 585 239 A spray gun can be removed for painting hard-to-reach objects. The air ducts, through which the air flow is guided in the direction of the outlet opening of the nozzle, covers the spray jet emerging from the nozzle almost completely. A certain amount of the air flow is deflected by the housing, namely in a through hole in the direction of the outlet opening of the nozzle, so that is directed by this proportion of the air flow of the spray jet in the direction of the surfaces to be coated. Therefore is, and this is to be regarded as particularly disadvantageous, made the mixing of the air flow with the paint spray jet outside the nozzle. The air flow is namely deflected by the bore and impinges outside of the nozzle on the there emerging paint spray. Thus, due to the mixing outside of the spray gun color contamination, color deposits and other unwanted fog effects caused by the unreliable and inaccurate mixing of the air flow with the paint spray.

Des Weiteren werden auch als Heizkörperdüsen bezeichnete Vorrichtungen der eingangs genannten Gattung von der Firma J. Wagner GmbH in 88677 Markdorf unter der Bezeichnung "Finecoat Heizkörperdüse RN30 " angeboten. Zwar kann der Spritzstrahl durch Drehen des Verlängerungsrohres kurzfristig auf das jeweilige Objekt eingestellt werden, da jedoch bei der bekannten Vorrichtung in den Luftkappen stets nur ein Luftleitkanal vorgesehen ist und somit zum Ablenken des Spritzstrahls auch nur ein Luftstrom zur Verfügung steht, erfolgt die seitliche Ablenkung des Spritzstrahles mehr oder weniger indifferent. Der Spritzstrahl fächert sich nämlich, da er nicht von dem Luftstrom eingeschlossen ist, bereits nach kurzer Wegstrecke auf, so dass vielfach ein diffuses Spritzbild und somit eine ungleichmäßige Beschichtung gegeben ist. Ferner ist hierbei von Nachteil, dass der Spritzstrahl auf dem zu beschichtenden Gegenstand ein relativ kleines Spritzbild ergibt. Der Zeitaufwand zum Beschichten von spaltförmigen Gebilden, wie zum Beispiel Heizkörperrippen, ist daher mitunter erheblich.Furthermore, also referred to as radiator nozzles devices of the type mentioned by the company J. Wagner GmbH in 88677 Markdorf under the name "Finecoat radiator nozzle RN30 Although the spray jet can be adjusted by rotating the extension tube at short notice to the respective object, but since in the known device in the air caps always only one air duct is provided and thus only one air flow is available for deflecting the spray jet, the The spray jet fills, namely, since it is not trapped by the air flow, already after a short distance, so that in many cases a diffuse spray pattern and thus an uneven coating is given. the spray jet on the object to be coated gives a relatively small spray pattern, so that the time required to coat gap-shaped structures, such as radiator fins, is sometimes considerable.

Auch ist das Entfernen der Luftkappe zeitaufwendig, da diese auf dem Verlängerungsrohr aufgeschraubt ist und in die Gewindegänge wie auch bei der Auftragsvorrichtung nach der US 2 610 092 Farbe oder ein anderes zu verarbeitendes Medium eindringt, das aushärten kann und durch das das Lösen der Luftkappe, abgesehen von den vorzunehmenden Schraubbewegungen, erheblich erschwert wird. Ein zufriedenstellendes Arbeiten ist demnach mit den bekannten Vorrichtungen oftmals nicht gegeben.Also, the removal of the air cap is time-consuming, as it is screwed onto the extension tube and in the threads as well as in the applicator after the US 2 610 092 color or another medium to be processed penetrates, which can harden and by which the release of the air cap, apart from the screw movements to be made, is considerably more difficult. A satisfactory work is therefore often not given with the known devices.

Aufgabe der Erfindung ist es daher, eine Auftragsvorrichtung der vorgenannten Art zu schaffen, mittels der nicht nur ein großflächiges und ein gleichmäßig ausgebildetes Spritzbild zu erzielen und somit ein schnelles Besprühen von Flächen ermöglicht ist, sondern es soll vor allem auch eine Vermischung des Luftstromes und des Farbspritzstrahles innerhalb der Spritzpistole erfolgen, um Verschmutzungen im Bereich der Austrittsöffnung der Düse der Spritzpistole zu vermeiden.The object of the invention is therefore to provide an applicator device of the aforementioned type, by means of which not only to achieve a large area and a uniform spray pattern and thus a quick spraying of surfaces is possible, but it is mainly a mixing of the air flow and the Spray jet within the spray gun to avoid contamination in the area of the outlet opening of the nozzle of the spray gun.

Gemäß der Erfindung wird dies bei einer Auftragsvorrichtung der vorgenannten Gattung dadurch erreicht, dass der auf den Spritzstrahl einwirkende Luftstrom in zwei oder mehrere Teilluftströme unterteilt ist, indem in der Luftkappe zwei oder mehrere voneinander getrennte Luftleitkanäle vorgesehen sind, die in Höhe der Düse und auf der dieser zugekehrten Seite offen ausgebildet sind und dass mit Hilfe einer abgewinkelten im Bereich der Düse angeordneten Prallwand die Teilluftströme in Richtung des Spritzstrahles umgelenkt und dieser von den Teilluftströmen etwa halbkreisförmig umschlossen ist.According to the invention this is achieved in an applicator device of the aforementioned type, characterized in that the air stream acting on the spray jet is divided into two or more partial air streams by two or more separate air ducts are provided in the air cap, the height of the nozzle and on the This facing side are designed to be open and that deflected by means of an angled arranged in the region of the nozzle baffle the partial air streams in the direction of the spray jet and this is surrounded by the partial air streams approximately semicircular.

Zweckmäßig ist es hierbei, dass die Luftkappe auf dem Verlängerungsrohr oder unmittelbar auf der Spritzpistole oder einem mit dieser verbundenem Zwischenglied aufgerastet ist. Zur Verrastung der Luftkappe ist das Veclängerungsrohr bzw. ein Zwischenglied der Spritzpistole mit einer umlaufenden Rastnut und die Luftkappe mit mindestens einer radial elastisch verformbaren Lasche zu versehen, die mit einem Rastvorsprung in die Rastnut des Verlängerungsrohres bzw. des Zwischengliedes eingreift.It is expedient in this case that the air cap is snapped onto the extension tube or directly on the spray gun or a connected thereto intermediate member. To lock the air cap is the Veclängerungsrohr or an intermediate member of the spray gun with a circumferential locking groove and the air cap to be provided with at least one radially elastically deformable tab which engages with a locking projection in the locking groove of the extension tube or the intermediate member.

Zur lageorientierten Verrastung der Luftkappe auf dem Verlängerungsrohr bzw. dem Zwischengliedes ist in dessen freies Ende ein offener Längsschlitz einzuarbeiten und die Luftkappe ist mit einer über einem Anschlag überstehenden Rippe zu versehen, die zur Verrastung der Luftkappe in den Längsschlitz des Verlängerungsrohres bzw. des Zwischengliedes eingreift, wobei der Anschlag der Luftkappe durch eine oder mehrere auf deren Innenmantelfläche angeordnete Längsrippen gebildet sein kann, deren dem Verlängerungsrohr bzw. des Zwischengliedes zugeordnete Anlagenflächen auf die in dieses eingearbeitete umlaufende Nut und die Lasche abgestimmt sein sollten.For position-oriented locking of the air cap on the extension tube or the intermediate member is to be incorporated in the free end of an open longitudinal slot and the air cap is provided with a protruding over a stop rib, which engages for locking the air cap in the longitudinal slot of the extension tube or the intermediate member , wherein the stop of the air cap can be formed by one or more arranged on the inner circumferential surface longitudinal ribs, whose the Extension tube or the intermediate member associated plant surfaces should be matched to the incorporated in this circumferential groove and the tab.

Zweckmäßig ist es des Weiteren, die Düse durch von der Luftkappe, dem Verlängerungsrohr und/oder dem Zwischenglied radial nach innen abstehende Rippen, vorzugsweise den zur lageorientierten Verrastung der Luftkappe vorgesehene Rippen, zu zentrieren.It is furthermore expedient to center the nozzle by means of ribs projecting radially inwards from the air cap, the extension tube and / or the intermediate member, preferably the ribs provided for the position-oriented locking of the air cap.

Ferner ist es angezeigt, den auf den Spritzstrahl einwirkenden Luftstrom in zwei oder mehrere Teilluftströme zu unterteilen, indem in der Luftkappe zwei oder mehrere voneinander getrennte Luftleitkanäle vorgesehen werden, die in Höhe der Düse und auf der dieser zugekehrten Seite offen ausgebildet sind.Furthermore, it is advisable to subdivide the air stream acting on the spray jet into two or more partial air streams by providing in the air cap two or more separate air ducts which are open at the level of the nozzle and on the side facing it.

Bei unmittelbar auf der Spritzpistole bzw. einem mit dieser verbundenen Zwischenglied angeordneten Luftkappe ist es selbstverständlich auch möglich, in die Luftkappe nur einen Luftleitkanal zur Ablenkung des Spritzstrahls vorzusehen.When directly on the spray gun or an associated with this intermediate member air cap, it is of course also possible to provide in the air cap only one air duct for deflecting the spray jet.

Wird die Luftkappe gemäß der Erfindung mit zwei oder mehreren tuftleitkanälen ausgestattet, so wirken beim Versprühen von Farbe oder einem anderen Medium auf den Spritzstrahl von der Seite zwei oder mehrere Luftströme ein, so dass der Spritzstrahl etwa halbkreisförmig von den Luftströme umhüllt ist und sich nur geringfügig im offenen Bereich auffächern kann. Dadurch wird auf dem zu beschichtenden Gegenstand ein großflächiges Spritzbild mit einer in der Projektion ovalen Fläche erzeugt, so dass Beschichtungen in wesentlich kürzerer Zeit als mit den bekannten Heizkörperdüsen vorzunehmen sind. Des Weiteren ist von Vorteil, dass durch die Führung des Spritzstrahls auch eine gleichmäßige Beschichtung zu erzielen ist. Ein zusätzlicher Bauaufwand ist, um dies zu bewerkstelligen, nicht erforderlich, in die Luftkappe sind lediglich zwei oder mehrere voneinander getrennte Luftleitkanäle einzuarbeiten bzw. einzuformen. Mit Hilfe der Querschnittsflächen, durch die jeweils die durchströmenden Luftmengen bestimmt sind, Ist der Spritzstrahl mehr oder weniger beeinflussbar.If the air cap is equipped according to the invention with two or more tuftleitkanälen, then act when spraying paint or other medium on the spray jet from the side of two or more air streams, so that the spray jet is about semicircular enveloped by the air currents and only slightly in the open area fan out. As a result, a large-area spray pattern with an oval in the projection surface is produced on the object to be coated, so that coatings are made in a much shorter time than with the known radiator nozzles. Furthermore, it is advantageous that a uniform coating can be achieved by the guidance of the spray jet. An additional construction effort is to accomplish this, not required, in the air cap only two or more separate air ducts are incorporated or einzuformen. With the aid of the cross-sectional areas through which the respective quantities of air flowing through are determined, the spray jet can be more or less influenced.

Zweckmäßig ist es des Weiteren, die Stirnfläche der Prallwand abschnittsweise jeweils parallel zu den Längsachsen, der Luftleitkanäle auszurichten.It is furthermore expedient to align the end face of the baffle wall in sections, in each case parallel to the longitudinal axes, of the air guide channels.

Die Handhabung der Vorrichtung bzw. der Spritzpistole wird erleichtert, wenn das Verlängerungsrohr bzw. die Spritzpistole und/oder das Zwischenglied und die Luftkappe mit einander zugeordneten Markierungen versehen sind und das Verlängerungsrohr bzw. das Zwischenglied, vorzugsweise im Bereich des der Spritzpistole zugeordneten Endes, einen radial abstehenden Vorsprung, zum Beispiel in Form einer Längsrippe aufweist, dessen Lage auf die Luftleitkanäle abgestimmt ist.The handling of the device or the spray gun is facilitated when the extension tube or the spray gun and / or the intermediate member and the air cap are provided with associated markings and the extension tube or the intermediate member, preferably in the region of the spray gun associated end, a radially projecting projection, for example in the form of a longitudinal rib, whose position is matched to the air ducts.

Aufgrund der vorgeschlagenen Verrastbarkeit der Luftkappe auf dem Verlängerungsrohr bzw. der Spritzpistole oder einem dieser zugeordneten Zwischenlied ist es möglich, diese in kurzer Zeit lageorientiert zu montieren und auch abzunehmen, ohne dass dies durch das zu verarbeitende Material beeinträchtigt werden kann. Das zu verarbeitende Material kann nämlich nicht zu den die Rastverbindung bewerkstelligenden Bauteilen gelangen. Auch werden die Montage der Luftkappe durch die vorgesehenen Markierungen und deren Ausrichtung auf die jeweils zu bearbeitende Fläche durch den angeformten Vorsprung sehr erleichtert, so dass bei einfacher Handhabung eine betriebssichere und störungsfreie Funktion über einen langen Zeitraum gegeben sind.Due to the proposed Verrastbarkeit the air cap on the extension tube or the spray gun or an associated intermediate song, it is possible to mount them position-oriented in a short time and also to decrease, without this being affected by the material to be processed. Namely, the material to be processed can not reach the components effecting the latching connection. Also, the assembly of the air cap by the provided markings and their orientation to the respective surface to be machined by the molded projection are greatly facilitated, so that with ease of handling a reliable and trouble-free operation over a long period are given.

In der Zeichnung ist ein Ausführungsbeispiel der gemäß der Erfindung ausgebildeten Auftragsvorrichtung dargestellt, das nachfolgend im einzelnen erläutert ist.In the drawing, an embodiment of the invention formed according to the application device is shown, which is explained in detail below.

Hierbei zeigt:

Figur 1
eine Spritzpistole mit einem Verlängerungsrohr und auf diesem angeordneter Luftkappe, in Draufsicht,
Figur 2
das an der Spritzpistole nach Figur 1 angebrachte Verlängerungsrohr mit Luftkappe in Vorderansicht und vergrößerter Darstellung.
Figur 3
die auf dem Verlängerungsrohr der Spritzpistole nach Figur 1 aufgerastete Luftkappe, in einem Axialschnitt und vergrößerter Wiedergabe,
Figur 4
die Luftkappe nach Figur 3, in perspektivischer Darstellung,
Figur 5
den Verlauf des Spritzstrahls und der Luftströme bei der Luftkappe nach Figur 3, in schematischer Darstellung,
Figur 6
die Luftkappe nach Figur 5, in Draufsicht, und
Figur 7
eine Luftkappe mit drei seitlich auf den Spritzstrahl einwirkenden Luftströme, in Draufsicht.
Hereby shows:
FIG. 1
a spray gun with an extension tube and arranged on this air cap, in plan view,
FIG. 2
following the spray gun FIG. 1 attached extension tube with air cap in front view and enlarged view.
FIG. 3
following the extension tube of the spray gun FIG. 1 latched air cap, in an axial section and enlarged playback,
FIG. 4
the air cap after FIG. 3 , in perspective,
FIG. 5
the course of the spray jet and the air flows at the air cap after FIG. 3 in a schematic representation,
FIG. 6
the air cap after FIG. 5 , in plan view, and
FIG. 7
an air cap with three laterally acting on the spray jet air streams, in plan view.

Die in Figur 1 dargestellte und mit 1 bezeichnete Vorrichtung dient zum Auftragen von Farbe oder ähnlichen flüssigen Medien auf schwer zugängliche Flächen, wie zum Beispiel auf die Radiatoren 2 eines Heizkörpers, auf denen mittels eines Spritzstrahls 3 eine Beschichtung 4 aufzubringen ist, und besteht im wesentlichen aus einer Spritzpistole 11, einem an diesem verdrehbar und lösbar gehaltenen Verlängerungsrohr 12, um leicht zu den Radiatoren 2 zu gelangen, und einer auf dem Verlängerungsrohr 12 angeordneten Luftkappe 16, aus der der Spritzstrahl 3 seitlich abgelenkt austritt. Das Veriängerungsrohr 12 ist hierbei mit Hilfe einer auf die Spritzpistole 11 aufschraubbaren Überwurfmutter 13 gehalten und weist eine Düse 14 auf, die mittels einer Düsennadel 15 betätigbar ist.In the FIG. 1 illustrated and designated 1 device is used to apply paint or similar liquid media to hard to reach areas, such as the radiators 2 of a radiator on which by means of a spray jet 3, a coating 4 is applied, and consists essentially of a spray gun 11th , an extension tube 12 held rotatably and releasably thereon for easy access to the radiators 2, and an air cap 16 arranged on the extension tube 12, from which the spray jet 3 exits laterally deflected. The Veriängerungsrohr 12 is in this case held by means of a screw-on the spray gun 11 union nut 13 and has a nozzle 14 which is actuated by means of a nozzle needle 15.

Zur Zerstäubung der bei geöffneter Düse 14 aus dieser austretenden Farbe ist ein Luftstrom 5 vorgesehen, der über einen zwischen dem Veriängerungsrohr 12 und einem in dieses eingesetzten Rohr 18 vorgesehenen Luftkanal 20 einem auf den Spritzstrahl 3 gerichteten Luftkanal 20' zugeführt wird. Des Weiteren strömt durch einen zwischen der Düsennadel 15 und dem Rohr 18 gebildeten Kanal 19 das zu zerstäubende Medium der Düse 15 zu.For atomizing the nozzle 14 when the nozzle exits therefrom, an air stream 5 is provided, which is supplied via an air duct 20, which is directed onto the spray jet 3, through an air duct 20 provided between the expansion pipe 12 and a pipe 18 inserted therein. Furthermore, the medium to be atomized flows to the nozzle 15 through a channel 19 formed between the nozzle needle 15 and the tube 18.

Um den Spritzstrahl 3 seitlich abzulenken und dabei teilweise zu umhüllen, so dass sich auf dem Radiator 2 ein ovales Spritzfeld ergibt und der Spritzstrahl 3 nur im offenen Bereich aufgefächert wird, sind in die Luftkappe 16 zwei Luftleitkanäle 21 und 22 eingearbeitet, deren Querschnittsflächen oval ausgebildet sind und deren Längsachsen a und a' unter einem Winkel α von etwa 90° zueinander geneigt verlaufen. Im Bereich ... der Düse 14 sind die Luftleitkanäle 21, 22 auf der dieser zugekehrten Seite offen gestaltet.In order to divert the spray jet 3 laterally and thereby partially enveloping, so that on the radiator 2 results in an oval spray field and the spray jet 3 is fanned only in the open area, 16 two air ducts 21 and 22 are incorporated in the air cap, whose cross-sectional areas formed oval are and whose longitudinal axes a and a 'are inclined at an angle α of about 90 ° to each other. In the area ... the nozzle 14, the air ducts 21, 22 designed on the side facing this open.

Aus der Luftkappe 16 treten demnach zwei Luftleitströme 6 und 7 aus, die auf eine an der Luftkappe 16 angeformten winkelig abstehenden Prallwand 17 auftreffen und von dieser in Richtung des Spritzstrahls 3 abgelenkt werden. Die Luftströme 6 und 7 hüllen somit den Spritzstrahl 3 etwa halkreisförmig ein und lenken diesen unter einem Winkel, der durch die Neigung der Prallwand 17 beeinflussbar ist, seitlich ab, so dass die seitlich neben dem Verlängerungsrohr 12 befindlichen Radiatoren 2 großflächig und gleichmäßig mit der Beschichtung 4 versehen werden können.Accordingly, two air flow streams 6 and 7 emerge from the air cap 16, which impinge on an angularly projecting baffle 17 formed on the air cap 16 and are deflected by the latter in the direction of the spray jet 3. The air streams 6 and 7 thus wrap the spray jet 3 approximately circularly and deflect it at an angle which can be influenced by the inclination of the baffle 17 laterally, so that the radiators 2 located laterally next to the extension tube 12 cover a large area and uniformly with the coating 4 can be provided.

Bei der Ausgestaltung nach Figur 7 sind in die Luftleitkappe 16' drei Luftleitkahäle 21', 22' und 22" eingearbeitet, die im Querschnitt ebenfalls oval ausgebildet sind. Die Längsachsen b' und b" der beiden äußeren Luftleitkanäle 22' und 22" verlaufen hierbei unter einem Winkel β von etwa 120° zur Längsachse b des mittleren Luftleitkanals 21' geneigt, außerdem sind die Querschnittsflächen der Luftleitkanäle 22' und 22" kleiner bemessen als die Querschnittsfläche des Luftleitkanals 21'. Der Sprifizstrahl 3 wird somit durch den aus dem Luftleitkanal 21' austretenden Luftstrom 8 seitlich in Richtung des Radiators 2 abgelenkt. Die beiden aus den Luftleitkanälen 22' und 22" austretenden Luftströme 9 und 10 hüllen den Spritzstrahl 3 seitlich ein, dieser kann demnach nur geringfügig auffächem:In the embodiment according to FIG. 7 are in the air cap 16 'three Luftleitkahäle 21', 22 'and 22 "incorporated, which are also oval in cross-section.The longitudinal axes b' and b" of the two outer air ducts 22 'and 22 "in this case at an angle β of about 120 ° to the longitudinal axis b of the central air duct 21 'inclined, also the cross-sectional areas of the air ducts 22' and 22 "dimensioned smaller than the cross-sectional area of the air duct 21 '. The spray beam 3 is thus deflected laterally in the direction of the radiator 2 by the air flow 8 emerging from the air duct 21 '. The two air streams 9 and 10 emerging from the air ducts 22 'and 22 "envelop the spray jet 3 laterally, so it can only slightly fan out:

Auch verlaufen die Stirnflächen 17" der Prallwand 17 bzw. 17' jeweils parallel zu den Längsachsen a, a' bzw. b, b', b" der Luftleitkanäle 21, 22 bzw. 21', 22' und 22".Also, the end surfaces 17 "of the baffle 17 and 17 'extend parallel to the longitudinal axes a, a' and b, b ', b" of the air ducts 21, 22 and 21', 22 'and 22 "respectively.

Die Luftkappe 16 ist, wie dies insbesondere der Figur 3 zu entnehmen ist, lageorientiert auf dem Verlängerungsrohr 12 aufgerastet. Um dies zu bewerkstelligen ist in das Verlängerungsrohr 12 eine umlaufende Rastnut 31 eingearbeitet und die Luftkappe 16 weist mehrere über den Umfang gleichmäßig verteilt angeordnete elastisch verformbare Laschen 32 auf, die mittels abstehender Rastnasen 33 in die Rastnut 31 eingreifen. Die Laschen 32 sind bei dem gezeigten Ausführungsbeispiel, wie dies insbesondere der Figur 4 zu entnehmen ist, durch in die Luftkappe 16 eingearbeitete U-förmige Schlitze 32'gebildet.The air cap 16 is, as in particular the FIG. 3 can be seen, orientation oriented latched on the extension tube 12. To accomplish this, a circumferential locking groove 31 is incorporated in the extension tube 12 and the air cap 16 has a plurality of circumferentially evenly distributed elastically deformable tabs 32 which engage in the locking groove 31 by means of protruding locking lugs 33. The tabs 32 are in the embodiment shown, as in particular the FIG. 4 can be seen formed by incorporated in the air cap 16 U-shaped slots 32 '.

Außerdem sind auf der Innenmantelfläche der Luftkappe 12 radial nach innen abstehende Rippen 34 sowie 36 und 36' vorgesehen, die zur Führung der Düse 14 dienen und die die lageorientierte Ausrichtung der Luftkappe 16 ermöglichen. Die Rippe 34 ist hierbei in ihrer axialen Erstreckung größer bemessen als die Rippen 36 und 36'. Des Weiteren ist in das Verlängerungsrohr 12 ein Längsschlitz 37 eingearbeitet, in den die aufgerastete Luftkappe 12 - wie dies in Figur 3 gezeigt ist - mit der Rippe 34 eingreift.In addition, on the inner circumferential surface of the air cap 12 radially inwardly projecting ribs 34 and 36 and 36 'are provided which serve to guide the nozzle 14 and allow the position-oriented orientation of the air cap 16. The rib 34 is dimensioned larger in its axial extent than the ribs 36 and 36 '. Furthermore, a longitudinal slot 37 is incorporated into the extension tube 12, in which the latched air cap 12 - as in FIG. 3 is shown - engages with the rib 34.

Beim Aufstecken der Luftkappe 16 auf das Verlängerungsrohr 12 liegt zunächst die Stimfläche der Rippe 34 an der Stirnfläche des Verlängerungsrohres 12 an. Wird sodann die Luftkappe 12 verdreht, rastet bei entsprechender Ausrichtung der Luftkappe 12 die Rippe 34 in den Längsschlitz 37 ein, die Rippen 36 und 36' stützen sich dabei an der Stimfläche des Verlängerungsrohres 12 ab. Die Stirnflächen der Rippen 36 und 36' wirken hierbei als Anschlag 35, der mit der Rastnut 31 und den Rastvorsprüngen 33 der Laschen 32 derart abgestimmt ist, dass eine axiale Verspannung der Luftleitkappe 12 gegeben ist.When attaching the air cap 16 on the extension tube 12 is initially the end face of the rib 34 on the end face of the extension tube 12 at. If the air cap 12 is then rotated, the rib 34 snaps into the longitudinal slot 37 when the air cap 12 is aligned accordingly; the ribs 36 and 36 'rest on the end face of the extension tube 12. The end faces of the ribs 36 and 36 'act as a stop 35, which is matched with the locking groove 31 and the latching projections 33 of the tabs 32 such that an axial tension of the air guide cap 12 is given.

Um das Aufsetzen der Luftkappe 16 auf dem Verlängerungsrohr 12 zu erleichtern, sind auf diesem und der Luftkappe 16 pfeilartige einander zugeordnete Markierungen 38 und 39 angebracht. Die Luftkappe 12 kann somit bereits beim Aufstecken auf das Verlängerungsrohr 12 entsprechend ausgerichtet werden.In order to facilitate the placement of the air cap 16 on the extension tube 12, 16 arrow-like associated markings 38 and 39 are mounted on this and the air cap. The air cap 12 can thus be aligned accordingly when plugging onto the extension tube 12.

Des Weiteren ist an dem der Spritzpistole 11 zugekehrten Ende des Verlängerungsrohres 12 ein Vorsprung 40 in Form einer Längsrippe angebracht, der auf die Lage der Luftleitkanäle 21, 22 bzw. 21', 22' und 22'" ausgerichtet ist. Wird die Überwurfmutter 13 gelöst, kann das Verlängerungsrohr 12 mit Hilfe des Vorsprungs 40 entsprechend dem vorzunehmenden Arbeitsvorgang leicht verdreht werden, um beispielsweise bei einer Verdrehung um 180° gegenüberliegende Radiatoren eines Heizkörpers zu beschichten.Furthermore, a projection 40 in the form of a longitudinal rib, which is aligned with the position of the air guide channels 21, 22 or 21 ', 22' and 22 '", is attached to the end of the extension tube 12 facing the spray gun 11. The union nut 13 is released , the extension tube 12 can be easily rotated by means of the projection 40 according to the operation to be performed in order to For example, to coat at a rotation of 180 ° opposite radiators of a radiator.

Claims (14)

  1. A device (1) for applying paint or other fluid media onto surfaces that are difficult to access, such as for coating the fins (2) of a radiator, consisting of a spray gun (11) for transporting the paint (2) or the fluid, of an extension pipe (12) in a releasable connection with the spray gun (11), into the free end of which extension pipe (12) there is inserted a nozzle (14) that can be actuated by means of a valve needle (15), and of an air cap (16) removably attached to the extension pipe (12), by means of which an air flow (5) supplied through the extension pipe (12) is supplied to the spray jet (3) emerging from the nozzle (14),
    characterised in that,
    the air flow (5) acting on the spray jet (3) is dividend into two or more partial air flows (6, 7 or 8, 9, 10) by the air cap (16, 16') having two or more air guide ducts (21, 22 or 21', 22', 22") provided in it that are separated from one another and are configured open at the level of the nozzle (14) and on the side facing towards them, and that with the help of an angled baffle wall (17 or 17') arranged in the area of the nozzle (14), the partial air flows (6, 7 or 9, 10) are redirected in the direction of the spray jet (3) and this is enclosed by the partial air flows (6, 7 or 9, 10) in an approximately semi-circular arrangement.
  2. The device in accordance with Claim 1,
    characterised i n that
    the air cap (16) is clipped onto the extension pipe (12) or directly onto the spray gun (11) or an intermediate element connected to it.
  3. The device in accordance with Claim 1,
    characterised in that
    the air guide ducts (21, 22 or 21', 22', 22") have an oval or elliptic cross section.
  4. The device in accordance with Claim 1,
    characterised in that
    in the case of two air guide ducts (21, 22) provided in the air cap (16), the longitudinal axes (a, a') of which are arranged running at an angle α of approx. 70° to 110° in relation to one another.
  5. The device in accordance with Claim 4,
    characterised in that
    the cross-sectional surfaces of the two air guide ducts (21, 22) are approximately equal in size.
  6. The device in accordance with Claim 1 or 3,
    characterised in that
    when there are three air guide ducts (21', 22', 22") provided in the air cap (16'), the longitudinal axes (b', b") of the two outer air guide ducts (22', 22") are each arranged running at an angle β of 90° or more, preferably 120°, in relation to the longitudinal angle (b) of the middle air guide duct (21').
  7. The device in accordance with Claim 6,
    characterised in that,
    the two outer air guide ducts (22', 22") each have cross-sectional surfaces of about the same size or up to 50% smaller than the cross-sectional surface of the middle air guide duct (21').
  8. The device in accordance with one or more of Claims 1 to 7,
    characterised in that,
    the end face (17") of the baffle wall (17, 17') is aligned in sections each in parallel to the longitudinal axes (a, a' or b, b', b") of the air guide ducts (21, 22 or 21',22', 22").
  9. The device in accordance with Claim 2,
    characterised in that,
    for locking the air cap (16), the extension pipe (12) or an intermediate element of the spray gun (11) is provided with a circumferential locking groove (31) and the air cap (16) with at least one radial, elastically deformable lug (32) having a locking projection (33) which engages in the locking groove (31) of the extension pipe (12) or the intermediate element.
  10. The device in accordance with one or more of Claims 1 to 9,
    characterised in that,
    for positionally oriented locking of the air cap (16) on the extension pipe (12) or the intermediate element into its free end, an open longitudinal slot (37) is worked in and the air cap (16) is provided with a rib (34) projecting beyond a stop (35), in which case the rib (34) engages in the longitudinal slot (37) of the extension pipe (12) or the intermediate element for locking of the air cap (16)..
  11. The device in accordance with Claim 10,
    characterised in that,
    the stop (35) of the air cap (16) is formed by the end faces of one or more longitudinal ribs (36, 36') arranged on their inner jacket surface, with their contact surfaces facing the extension pipe (12) or the intermediate element being adapted to the circumferential locking groove (31) worked into it, and to the lug (32).
  12. The device in accordance with one or more of Claims 8 to 11,
    characterised in that,
    the nozzle (14) is centred by ribs projecting radially inward from the air cap (16), the extension pipe (12) and/or the intermediate piece, in a preferred embodiment the ribs (34, 36, 36') provided for positionally oriented locking of the air cap (16).
  13. The device in accordance with one of Claims 1 or 12,
    characterised in that,
    the extension pipe (12) or the spray gun (11) and/or the intermediate element and the air cap (16) are provided with markings (38, 39) facing one another, and preferably protruding.
  14. The device in accordance with one or more of Claims 1 to 13,
    characterised in that,
    the extension pipe (12) or the intermediate element is provided, preferably in the area of the end allocated to the spray gun (11), with a radially protruding projection (40), for example in the form of a longitudinal rib, the length of which is adapted to the air guide ducts (21, 22).
EP06014517A 2005-07-20 2006-07-13 Coating device Active EP1745854B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115463773A (en) * 2022-09-29 2022-12-13 湖北超卓航空科技股份有限公司 Deflection system for cold spraying spray gun and cold spraying device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0605105D0 (en) * 2006-03-14 2006-04-26 Bwi Plc Spray gun heads
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics
WO2022123192A1 (en) * 2020-12-09 2022-06-16 Harris Innovations Ltd Atomizer apparatus

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Publication number Priority date Publication date Assignee Title
DE585239C (en) * 1933-09-30 Prea G M B H Spray gun for painting hard-to-reach objects
US2610092A (en) 1950-10-26 1952-09-09 Spray Engineering Co Spray discharge nozzle
US5165605A (en) * 1989-03-30 1992-11-24 Iwata Air Compressor Mfg. Co., Ltd. Low pressure air atomizing spray gun
US6267300B1 (en) * 1999-12-09 2001-07-31 The Boeing Company Spray back fluid applicator
US6971590B2 (en) * 2003-12-30 2005-12-06 3M Innovative Properties Company Liquid spray gun with manually rotatable frictionally retained air cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115463773A (en) * 2022-09-29 2022-12-13 湖北超卓航空科技股份有限公司 Deflection system for cold spraying spray gun and cold spraying device

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