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EP1912745B1 - Method for spraying on pigmented liquids - Google Patents

Method for spraying on pigmented liquids Download PDF

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Publication number
EP1912745B1
EP1912745B1 EP06776707A EP06776707A EP1912745B1 EP 1912745 B1 EP1912745 B1 EP 1912745B1 EP 06776707 A EP06776707 A EP 06776707A EP 06776707 A EP06776707 A EP 06776707A EP 1912745 B1 EP1912745 B1 EP 1912745B1
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EP
European Patent Office
Prior art keywords
nozzle
compressed air
inlet
liquid
pigmented
Prior art date
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Application number
EP06776707A
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German (de)
French (fr)
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EP1912745A1 (en
Inventor
Berthold Heigl
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Individual
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Individual
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Priority to PL06776707T priority Critical patent/PL1912745T3/en
Publication of EP1912745A1 publication Critical patent/EP1912745A1/en
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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
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • 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
    • 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
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • 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
    • B05B7/24—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 with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/2405—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle
    • B05B7/2435—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using an atomising fluid as carrying fluid for feeding, e.g. by suction or pressure, a carried liquid from the container to the nozzle the carried liquid and the main stream of atomising fluid being brought together by parallel conduits placed one inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • 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
    • B05B7/12—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages
    • B05B7/1209—Spray pistols; Apparatus for discharge designed to control volume of flow, e.g. with adjustable passages the controlling means for each liquid or other fluent material being manual and interdependent

Definitions

  • the invention is directed to a device for spraying pigmented liquids by means of an air stream comprising a main body, a spray nozzle arranged at the front of the main body, a compressed air inlet and a subsequent compressed air channel, an inlet for a pigmented liquid, wherein an adjustable compressed air flow supplied by the compressed air channel is passed at an inlet for the pigmented liquid and loaded with liquid droplets and these liquid droplets are discharged through the spray nozzle, as long as the compressed air flow is maintained.
  • Such devices are commonly referred to as an airbrush or "airbrush gun".
  • the entrainment of the liquid droplets is due to a negative pressure generated by a Venturi effect.
  • very different media can be applied with such a device. In the following, the sake of simplicity is always spoken only of color.
  • a generic device is off US 5,454,517 known.
  • a disadvantage of such devices is that when changing to a different color or after a long break in use, the nozzle must be cleaned, which is time consuming and laborious and also involves the risk that damaging the delicate, arranged in the nozzle needle which can lead to drastic dysfunctions or inability to function.
  • a device for spraying pigmented liquids by means of an air flow is known, the one Base body, a arranged at the front of the body spray nozzle with a centrally disposed therein, acted upon by a spring needle, a compressed air inlet and a subsequent compressed air channel and a pigmented liquid inlet, wherein a supplied through the compressed air duct controllable compressed air flow at the inlet for the pigmented liquid can be guided past and loaded with liquid droplets and these liquid droplets can be dispensed through the spray nozzle while maintaining the compressed air flow.
  • the spray nozzle and needle are seated in a nozzle carrier having the inlet for the pigmented liquid.
  • the nozzle carrier can be removed or replaced as a whole.
  • the invention is based on the object, such a device in such a way that it is very inexpensive to produce and advantageous in handling, in particular, a cleaning of the nozzle can be avoided with the associated problems.
  • a device having the features according to claim 1 is provided. It is envisaged that the nozzle and the needle are seated in a paint-guiding nozzle member, the paint-carrying nozzle member having the inlet for the pigmented liquid, and the ink-carrying nozzle member as a whole being removable or replaceable.
  • This embodiment has the very significant advantage that all acted upon by color parts can be removed or replaced together, so that a color change is completely easy and no manual cleaning required. When placing a new spray head is given no bias by another color and therefore ensures that the new color can be sprayed completely undisturbed.
  • an air duct in the form of a flexible hose is provided, the diameter of which is advantageously variable, in order to adjust the air flow rate in this way.
  • This may conveniently be accomplished by arranging a wheel in a guide which extends obliquely to the hose and the wheel more or less the free cross-section of the hose depending on the axial position of the wheel which is actuatable from the outside of the housing less free.
  • the actuating lever is associated with an adjustable stop for the actuating lever to achieve a constant uniform spray pattern.
  • This adjustable stop is preferably formed by a threaded rod, which is axially displaceable by means of an externally accessible knurled nut.
  • a nozzle hood surrounding the color channel is materially connected to the nozzle and can be fixed by a locking screw.
  • the drawing shows a longitudinal section through a device according to the invention.
  • a device has an elongated, base-like, stick-like base body 1, at the front end of which a paint-guiding nozzle part 2 is arranged.
  • the ink-carrying nozzle part 2 comprises a conical nozzle hood 3 with a passage and guide bore 4 for a nozzle 5, a safety hood 6 engaging over the nozzle hood 3 and an annular body 7.
  • the annular body 7 has an annular circumferential groove 8, in which a guide collar 9 of the base body 1 engages, so that the annular body is mounted pivotably through 360 °.
  • a nozzle carrier 10 is further arranged, from which a nozzle tube 11 extends away, at the front end of the nozzle 5 is formed.
  • a needle 12 Inside the nozzle tube 11 sits a needle 12, which is acted upon by a coil spring 13.
  • the coil spring 13 and the needle 12 are arranged in a longitudinal bore 14 of the nozzle carrier 10, wherein in this longitudinal bore 14 a, as described below, longitudinally displaceable actuating tappet 15 acts.
  • the nozzle carrier 10 has a substantially round outer shape and is positively inserted into the annular body 7, wherein a lateral projection 16 of the nozzle carrier 10 in a - not visible in the drawing - slot of the annular body 7 engages and is fixed relative to the annular body 7 rotatably , which in turn but is rotatable relative to the base body 1.
  • a color inlet 17 is formed in the form of a recess, wherein in the paint inlet 17, either a connecting hose can be used to a paint reservoir or the insertion of a small, directly attachable paint reservoir.
  • the annular body 7 has an external thread 18, onto which the internal thread 19 of the securing hood 6 can be screwed.
  • the nozzle hood 3 can be attached to the ring body 7 via the securing hood 6, wherein at the same time the nozzle carrier 10, which sits in the frontal recess of the base body 1, is axially fixed.
  • the ink-carrying nozzle part 2 is rotatable in total relative to the base body 1 and the nozzle carrier 10 with the ink inlet 17, the nozzle 5, the nozzle needle 12 and the coil spring 13 are interchangeable, so that no ink-carrying part remains and can be easily re-worked with a new color when inserting a new nozzle holder 10.
  • the rear end of the nozzle needle 12 is connected to the coil spring 13, whereas the front end of the coil spring is supported on the narrowing nozzle 5, so that upon movement of the actuating plunger 15 forward, the coil spring 13 is compressed and upon a backward movement of the actuating plunger 15 the Coil spring 13, the nozzle needle 12 with withdraws.
  • the actuating plunger 15 is connected via its inner end 20 with a pivotable about a pivot axis, operable in the direction of arrow P operating lever H, the displacement against the force of a return spring 22 in the direction of arrow P causes the actuating plunger 15 to the right or is moved rearwardly, so that the coil spring 13, the needle 12 can shift in the drawing to the right, whereby with increasing movement to the right or rear, the passage opening of the nozzle 5 is increasingly increased and accordingly more color can be delivered.
  • an air inlet 23 is provided at the rear end of the main body 1.
  • an air channel 24 connects from the inside to a hose-like, flexible material. Slanted to the air channel 24 extends a guide 25 for a provided with a knurled surface thumb wheel 26 which engages in the compressed air channel 24 and this further opens by displacement to the front and by shifting to Rear closes, so that the compressed air passage can be adjusted in this way.
  • the compressed air channel 24 opens into the conically tapered nozzle hood 3, wherein the air flow is accelerated and flows past the nozzle 5 and due to the built-up by the Venturi effect, the ink from a color adjoining the color inlet 17 color channel 27 entrains, so by the nozzle 5 a color-air mixture flows out.
  • the compressed air structure can be done for example by means of a compressor.
  • the working pressure is a maximum of 3 bar.
  • the air duct 24 passes by the lever H and is squeezed at the point 28 when the lever H is in the front closing state.
  • moving the lever H direction of the arrow P is then, as already described, by displacing the needle to the rear of the nozzle 5 released and at the same time the compressed air channel 24 is opened.
  • the path of the release lever 17 can be limited or adjusted by a knurled nut 29 in order to maintain a constant spray line strength over a longer period of time.
  • the knurled nut 29 is seated on a threaded rod 30, which is displaced axially by a rotary movement of the knurled nut 29 and thus forms an adjustable stop for the release lever 17.

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  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

In a device for spraying on pigmented liquids by means of an air flow comprising a base body, a spray nozzle disposed at the front side of the base body, said spray nozzle having a needle acted upon by a spring disposed in the center thereof, a compressed air inlet and an adjacent compressed air duct, an inlet for a pigmented liquid, with a controllable compressed air flow supplied via the compressed air duct being guided past an inlet for the pigmented liquid where it is loaded with droplets of liquid, said droplets of liquid being discharged by the spray nozzle as long as the compressed air flow is maintained, it is provided that the nozzle (5) and the needle (12) are positioned in a nozzle carrier (10), with the nozzle carrier (10) being provided with the inlet (17) for the pigmented liquid, and with the nozzle carrier being removable or replaceable, respectively, as a whole.

Description

Die Erfindung richtet sich auf eine Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten mittels eines Luftstroms umfassend einen Grundkörper, eine an der Vorderseite des Grundkörpers angeordnete Sprühdüse, einen Drucklufteinlass und einen anschließenden Druckluftkanal, einen Einlass für eine pigmentierte Flüssigkeit, wobei ein durch den Druckluftkanal zugeführter regelbarer Druckluftstrom an einem Einlass für die pigmentierte Flüssigkeit vorbeigeführt und mit Flüssigkeitströpfchen beladen wird und diese Flüssigkeitströpfchen durch die Sprühdüse abgegeben werden, solange der Druckluftstrom aufrecht erhalten wird.The invention is directed to a device for spraying pigmented liquids by means of an air stream comprising a main body, a spray nozzle arranged at the front of the main body, a compressed air inlet and a subsequent compressed air channel, an inlet for a pigmented liquid, wherein an adjustable compressed air flow supplied by the compressed air channel is passed at an inlet for the pigmented liquid and loaded with liquid droplets and these liquid droplets are discharged through the spray nozzle, as long as the compressed air flow is maintained.

Derartige Vorrichtungen werden üblicher Weise als Luftbürste oder "Airbrush-Pistole" bezeichnet. Die Mitnahme der Flüssigkeitströpfchen erfolgt aufgrund eines durch einen Venturi-Effekt erzeugten Unterdrucks. Im Prinzip lassen sich mit einer solchen Vorrichtung ganz unterschiedliche Medien auftragen. Nachfolgend wird der Einfachheit halber stets nur von Farbe gesprochen.Such devices are commonly referred to as an airbrush or "airbrush gun". The entrainment of the liquid droplets is due to a negative pressure generated by a Venturi effect. In principle, very different media can be applied with such a device. In the following, the sake of simplicity is always spoken only of color.

Eine gattungsgemäße Vorrichtung ist aus US 5,454,517 bekannt. Ein Nachteil derartiger Vorrichtungen besteht darin, dass bei einem Wechsel zu einer anderen Farbe oder nach einer längeren Gebrauchspause die Düse gereinigt werden muss, was zeit- und arbeitsaufwändig ist und auch die Gefahr mit sich bringt, dass die empfindliche, in der Düse angeordnete Nadel beschädigt wird, was zu drastischen Funktionsstörungen oder zur Funktionsunfähigkeit führen kann.A generic device is off US 5,454,517 known. A disadvantage of such devices is that when changing to a different color or after a long break in use, the nozzle must be cleaned, which is time consuming and laborious and also involves the risk that damaging the delicate, arranged in the nozzle needle which can lead to drastic dysfunctions or inability to function.

Aus der EP 1 340 550 A2 ist eine Vorrichtung zum Aufsprühen von pigmentierten Flüssigkeiten mittels eines Luftstroms bekannt, die einen Grundkörper, eine an der Vorderseite des Grundkörpers angeordnete Sprühdüse mit einer darin mittig angeordneten, von einer Feder beaufschlagten Nadel, einen Drucklufteinlass und einen anschließenden Druckluftkanal sowie einen Einlass für eine pigmentierte Flüssigkeit umfasst, wobei ein durch den Druckluftkanal zugeführter regelbarer Druckluftstrom an dem Einlass für die pigmentierte Flüssigkeit vorbeiführbar und mit Flüssigkeitströpfchen beladbar ist und diese Flüssigkeitströpfchen durch die Sprühdüse bei aufrechterhaltendem Druckluftstrom abgebbar sind. Die Sprühdüse und die Nadel sitzen in einem Düsenträger, der den Einlass für die pigmentierte Flüssigkeit aufweist. Der Düsenträger ist als Ganzes entfern- bzw. austauschbar.From the EP 1 340 550 A2 a device for spraying pigmented liquids by means of an air flow is known, the one Base body, a arranged at the front of the body spray nozzle with a centrally disposed therein, acted upon by a spring needle, a compressed air inlet and a subsequent compressed air channel and a pigmented liquid inlet, wherein a supplied through the compressed air duct controllable compressed air flow at the inlet for the pigmented liquid can be guided past and loaded with liquid droplets and these liquid droplets can be dispensed through the spray nozzle while maintaining the compressed air flow. The spray nozzle and needle are seated in a nozzle carrier having the inlet for the pigmented liquid. The nozzle carrier can be removed or replaced as a whole.

Ähnliche weitere Vorrichtungen zum Aufsprühen von pigmentierten Flüssigkeiten werden in der WO 01/66261 A2 , US 2004/0065755 A1 sowie DE 195 25 611 A1 beschrieben.Similar other devices for spraying pigmented liquids are described in US Pat WO 01/66261 A2 . US 2004/0065755 A1 such as DE 195 25 611 A1 described.

Hiervon ausgehend liegt der Erfindung die Aufgabe zu Grunde, eine derartige Vorrichtung so auszugestalten, dass sie sehr kostengünstig herstellbar und vorteilhaft in der Handhabung ist, wobei insbesondere eine Reinigung der Düse mit den damit einhergehenden Problemen vermieden werden kann.On this basis, the invention is based on the object, such a device in such a way that it is very inexpensive to produce and advantageous in handling, in particular, a cleaning of the nozzle can be avoided with the associated problems.

Zur Lösung dieser Aufgabe ist eine Vorrichtung mit den Merkmalen gemäß Anspruch 1 vorgesehen. Es ist vorgesehen, dass die Düse und die Nadel in einem farbführenden Düsenteil sitzen, wobei das farbführende Düsenteil den Einlass für die pigmentierte Flüssigkeit aufweist, und wobei das farbführende Düsenteil als Ganzes entfernbar bzw. austauschbar sind.To solve this problem, a device having the features according to claim 1 is provided. It is envisaged that the nozzle and the needle are seated in a paint-guiding nozzle member, the paint-carrying nozzle member having the inlet for the pigmented liquid, and the ink-carrying nozzle member as a whole being removable or replaceable.

Diese Ausgestaltung hat den ganz erheblichen Vorteil, dass alle von Farbe beaufschlagten Teile gemeinsam entfernt bzw. ausgetauscht werden können, sodass ein Farbwechsel völlig problemlos ist und keinerlei manuelle Reinigungsarbeiten erforderlich macht. Beim Aufsetzen eines neuen Spritzkopfes ist keine Vorbelastung durch eine andere Farbe gegeben und dementsprechend gewährleistet, dass die neue Farbe völlig unbeeinträchtigt versprüht werden kann.This embodiment has the very significant advantage that all acted upon by color parts can be removed or replaced together, so that a color change is completely easy and no manual cleaning required. When placing a new spray head is given no bias by another color and therefore ensures that the new color can be sprayed completely undisturbed.

Vorteilhafterweise ist ein Luftkanal in Form eines flexiblen Schlauches vorgesehen, dessen Durchmesser günstigerweise veränderbar ist, um auf diese Weise den Luftdurchsatz zu verstellen.Advantageously, an air duct in the form of a flexible hose is provided, the diameter of which is advantageously variable, in order to adjust the air flow rate in this way.

Dies kann günstigerweise so bewerkstelligt werden, dass ein Rad in einer Führung angeordnet ist, welche schräg zum Schlauch verläuft, und das Rad den freien Querschnitt des Schlauchs in Abhängigkeit von der axialen Position des Rads, welches von der Außenseite des Gehäuses betätigbar ist, mehr oder weniger frei gibt.This may conveniently be accomplished by arranging a wheel in a guide which extends obliquely to the hose and the wheel more or less the free cross-section of the hose depending on the axial position of the wheel which is actuatable from the outside of the housing less free.

Dem Betätigungshebel ist zur Erzielung eines konstant gleichmäßigen Sprühbildes ein verstellbarer Anschlag für den Betätigungshebel zugeordnet.The actuating lever is associated with an adjustable stop for the actuating lever to achieve a constant uniform spray pattern.

Dieser verstellbarer Anschlag ist vorzugsweise durch eine Gewindestange bebildet, welche mittels einer von außen zugänglichen Rändelmutter axial verlagerbar ist.This adjustable stop is preferably formed by a threaded rod, which is axially displaceable by means of an externally accessible knurled nut.

Gemäß einer vorteilhaften Ausgestaltung ist weiterhin vorgesehen, dass eine den Farbkanal umgebende Düsenhaube mit der Düse stoffschlüssig verbunden ist und durch eine Sicherungsschraube festlegbar ist.According to an advantageous embodiment, it is further provided that a nozzle hood surrounding the color channel is materially connected to the nozzle and can be fixed by a locking screw.

Nachfolgend wird die Erfindung anhand eines bevorzugten Ausfiihrungsbeispiels in Verbindung mit der Zeichnung näher erläutert. Dabei zeigt die Zeichnung einen Längsschnitt durch eine erfindungsgemäße Vorrichtung.The invention will be explained in more detail below on the basis of a preferred exemplary embodiment in conjunction with the drawing. The drawing shows a longitudinal section through a device according to the invention.

Eine erfindungsgemäße Vorrichtung weist einen länglichen, stiftartig in der Hand haltbaren Grundkörper 1 auf, an dessen vorderen Ende ein farbführendes Düsenteil 2 angeordnet ist.A device according to the invention has an elongated, base-like, stick-like base body 1, at the front end of which a paint-guiding nozzle part 2 is arranged.

Das farbführende Düsenteil 2 umfasst eine konische Düsenhaube 3 mit einer Durchlass- und Führungsbohrung 4 für eine Düse 5, eine die Düsenhaube 3 übergreifende Sicherungshaube 6 und einen Ringkörper 7.The ink-carrying nozzle part 2 comprises a conical nozzle hood 3 with a passage and guide bore 4 for a nozzle 5, a safety hood 6 engaging over the nozzle hood 3 and an annular body 7.

Der Ringkörper 7 weist eine ringförmig umlaufende Nut 8 auf, in die ein Führungskragen 9 des Grundkörpers 1 eingreift, sodass der Ringkörper um 360° schwenkbar gelagert ist.The annular body 7 has an annular circumferential groove 8, in which a guide collar 9 of the base body 1 engages, so that the annular body is mounted pivotably through 360 °.

In dem farbführenden Düsenteil 2 ist weiterhin ein Düsenträger 10 angeordnet, von dem sich ein Düsenrohr 11 wegerstreckt, an dessen vorderen Ende die Düse 5 ausgebildet ist. Im Inneren des Düsenrohrs 11 sitzt eine Nadel 12, welche von einer Schraubenfeder 13 beaufschlagt ist. Die Schraubenfeder 13 und die Nadel 12 sind in einer Längsbohrung 14 des Düsenträgers 10 angeordnet, wobei in diese Längsbohrung 14 ein, wie nachfolgend beschrieben, längsverschiebbarer Betätigungsstößel 15 einwirkt.In the ink-carrying nozzle part 2, a nozzle carrier 10 is further arranged, from which a nozzle tube 11 extends away, at the front end of the nozzle 5 is formed. Inside the nozzle tube 11 sits a needle 12, which is acted upon by a coil spring 13. The coil spring 13 and the needle 12 are arranged in a longitudinal bore 14 of the nozzle carrier 10, wherein in this longitudinal bore 14 a, as described below, longitudinally displaceable actuating tappet 15 acts.

Der Düsenträger 10 besitzt eine im Wesentlichen runde Außenform und ist formschlüssig in den Ringkörper 7 einsetzbar, wobei ein seitlicher Ansatz 16 des Düsenträgers 10 in einen - in der Zeichnung nicht erkennbaren - Schlitz des Ringkörpers 7 eingreift und dementsprechend relativ zu dem Ringkörper 7 drehfest festgelegt ist, welcher seinerseits aber relativ zum Grundkörper 1 verdrehbar ist.The nozzle carrier 10 has a substantially round outer shape and is positively inserted into the annular body 7, wherein a lateral projection 16 of the nozzle carrier 10 in a - not visible in the drawing - slot of the annular body 7 engages and is fixed relative to the annular body 7 rotatably , which in turn but is rotatable relative to the base body 1.

In dem Ansatz 16 ist in Form einer Ausnehmung ein Farbeinlass 17 ausgebildet, wobei in den Farbeinlass 17 entweder ein Verbindungsschlauch zu einem Farbvorratsbehälter eingesetzt werden kann oder der Steckansatz eines kleinen, unmittelbar aufsetzbaren Farbvorratsbehälters.In the projection 16, a color inlet 17 is formed in the form of a recess, wherein in the paint inlet 17, either a connecting hose can be used to a paint reservoir or the insertion of a small, directly attachable paint reservoir.

Der Ringkörper 7 weist ein Außengewinde 18 auf, auf welches das Innengewinde 19 der Sicherungshaube 6 aufschraubbar ist. Auf diese Weise kann über die Sicherungshaube 6 die Düsenhaube 3 am Ringkörper 7 befestigt werden, wobei gleichzeitig der Düsenträger 10, der in der stirnseitigen Ausnehmung des Grundkörpers 1 sitzt, axial festgelegt wird.The annular body 7 has an external thread 18, onto which the internal thread 19 of the securing hood 6 can be screwed. In this way, the nozzle hood 3 can be attached to the ring body 7 via the securing hood 6, wherein at the same time the nozzle carrier 10, which sits in the frontal recess of the base body 1, is axially fixed.

Aus dem Vorstehenden wird deutlich, dass das farbführende Düsenteil 2 insgesamt relativ zum Grundkörper 1 verdrehbar ist und der Düsenträger 10 mit dem Farbeinlass 17, der Düse 5, der Düsennadel 12 und der Schraubenfeder 13 austauschbar sind, sodass kein farbführendes Teil zurückbleibt und beim Einsetzen eines neuen Düsenträgers 10 völlig problemlos mit einer neuen Farbe weitergearbeitet werden kann.From the above it is clear that the ink-carrying nozzle part 2 is rotatable in total relative to the base body 1 and the nozzle carrier 10 with the ink inlet 17, the nozzle 5, the nozzle needle 12 and the coil spring 13 are interchangeable, so that no ink-carrying part remains and can be easily re-worked with a new color when inserting a new nozzle holder 10.

Das hintere Ende der Düsennadel 12 ist mit der Schraubenfeder 13 verbunden, wohingegen das vordere Ende der Schraubenfeder sich an der sich verengenden Düse 5 abstützt, sodass bei einer Bewegung des Betätigungsstößels 15 nach vorne die Schraubenfeder 13 komprimiert wird und bei einer Rückwärtsbewegung des Betätigungsstößels 15 die Schraubenfeder 13 die Düsennadel 12 mit zurücknimmt.The rear end of the nozzle needle 12 is connected to the coil spring 13, whereas the front end of the coil spring is supported on the narrowing nozzle 5, so that upon movement of the actuating plunger 15 forward, the coil spring 13 is compressed and upon a backward movement of the actuating plunger 15 the Coil spring 13, the nozzle needle 12 with withdraws.

Der Betätigungsstößel 15 ist über sein inneres Ende 20 mit einem um eine Schwenkachse schwenkbar gelagerten, in Richtung des Pfeils P betätigbaren Betätigungshebel H verbunden, dessen Verlagerung gegen die Kraft einer Rückstellfeder 22 in Richtung des Pfeils P dazu führt, dass der Betätigungsstößel 15 nach rechts bzw. hinten bewegt wird, sodass die Schraubenfeder 13 die Nadel 12 in der Zeichnung nach rechts verlagern kann, wodurch mit zunehmender Bewegung nach rechts bzw. hinten die Durchlassöffnung der Düse 5 zunehmend vergrößert wird und dementsprechend mehr Farbe abgegeben werden kann.The actuating plunger 15 is connected via its inner end 20 with a pivotable about a pivot axis, operable in the direction of arrow P operating lever H, the displacement against the force of a return spring 22 in the direction of arrow P causes the actuating plunger 15 to the right or is moved rearwardly, so that the coil spring 13, the needle 12 can shift in the drawing to the right, whereby with increasing movement to the right or rear, the passage opening of the nozzle 5 is increasingly increased and accordingly more color can be delivered.

Am rückseitigen Ende des Grundkörpers 1 ist ein Lufteinlass 23 vorgesehen. An den Lufteinlass 23 schließt sich nach innen ein Luftkanal 24 aus einem schlauchartigen, flexiblen Material an. Schräg zu dem Luftkanal 24 verläuft eine Führung 25 für ein mit einer gerändelten Oberfläche versehenes Stellrad 26, welches in den Druckluftkanal 24 eingreift und diesen durch Verlagerung nach vorne weiter öffnet und durch Verlagerung nach hinten schließt, sodass auf diese Weise der Druckluftdurchlass eingestellt werden kann.At the rear end of the main body 1, an air inlet 23 is provided. At the air inlet 23, an air channel 24 connects from the inside to a hose-like, flexible material. Slanted to the air channel 24 extends a guide 25 for a provided with a knurled surface thumb wheel 26 which engages in the compressed air channel 24 and this further opens by displacement to the front and by shifting to Rear closes, so that the compressed air passage can be adjusted in this way.

Der Druckluftkanal 24 mündet in die sich konisch verjüngendes Düsenhaube 3, wobei der Luftstrom beschleunigt wird und an der Düse 5 vorbei strömt und aufgrund des durch den Venturi-Effekt aufgebauten Unterdrucks die Farbe aus einem sich an den Farbeinlass 17 anschließenden Farbkanal 27 mitnimmt, sodass durch die Düse 5 ein Farb-Luft-Gemisch ausströmt.The compressed air channel 24 opens into the conically tapered nozzle hood 3, wherein the air flow is accelerated and flows past the nozzle 5 and due to the built-up by the Venturi effect, the ink from a color adjoining the color inlet 17 color channel 27 entrains, so by the nozzle 5 a color-air mixture flows out.

Der Druckluftaufbau kann beispielsweise mittels eines Kompressors erfolgen. Der Arbeitsdruck beträgt maximal 3 bar.The compressed air structure can be done for example by means of a compressor. The working pressure is a maximum of 3 bar.

Der Luftkanal 24 führt an dem Hebel H vorbei und wird an der Stelle 28, wenn sich der Hebel H im vorderen Schließzustand befindet, abgequetscht. Beim Verlagern des Hebels H Richtung des Pfeils P wird dann, wie bereits beschrieben, durch Verlagerung der Nadel nach hinten die Düse 5 freigegeben und gleichzeitig der Druckluftkanal 24 geöffnet.The air duct 24 passes by the lever H and is squeezed at the point 28 when the lever H is in the front closing state. When moving the lever H direction of the arrow P is then, as already described, by displacing the needle to the rear of the nozzle 5 released and at the same time the compressed air channel 24 is opened.

Der Weg des Auslösehebels 17 kann durch eine Rändelmutter 29 begrenzt bzw. eingestellt werden, um über einen längeren Zeitraum eine konstante Sprühstrichstärke aufrecht erhalten zu können. Die Rändelmutter 29 sitzt auf einer Gewindestange 30, die durch eine Drehbewegung der Rändelmutter 29 axial verlagert wird und so einen verstellbaren Anschlag für den Auslösehebel 17 bildet.The path of the release lever 17 can be limited or adjusted by a knurled nut 29 in order to maintain a constant spray line strength over a longer period of time. The knurled nut 29 is seated on a threaded rod 30, which is displaced axially by a rotary movement of the knurled nut 29 and thus forms an adjustable stop for the release lever 17.

Claims (6)

  1. Device for spraying on pigmented liquids by means of an air flow comprising a base body (1), a spray nozzle (5) disposed at the front side of the base body (1), with a needle (12) disposed centrally in said spray nozzle (5) and acted upon by a spring, a compressed air inlet (23) and an adjacent compressed air duct (24), an inlet (17) for a pigmented liquid, with a controllable compressed air flow supplied via the compressed air duct (24) being guidable past the inlet (17) for the pigmented liquid, where it is loadable with droplets of liquid, said droplets of liquid being dischargeable by the spray nozzle (5) as along as the compressed air flow is maintained, wherein the spray nozzle (5) and the needle (12) are positioned in a nozzle support (10), said nozzle support (10) having the inlet (17) for the pigmented liquid, and said nozzle support (10) being removable or replaceable, respectively, as a whole,
    characterized in that
    a nozzle cover (3) being attachable to a ring body (7) mounted to the base body (1) for rotation through 360° and fixable by means of a safety cover (6) that may be screwed thereon, thus axially fixing the nozzle support (10) being insertable in the ring body (7).
  2. Device according to claim 1, characterized in that an air duct in the shape of a flexible hose (24) is provided.
  3. Device according to claim 2, characterized in that the diameter of the hose (24) is variable.
  4. Device according to claim 3, characterized in that a wheel (26) is disposed in a guide (25) which extends at an angle with respect to the hose (24), with the wheel (26), which is operable from the outside of a housing, opening the free cross-section of the hose (24) to a higher or lower extent, depending on the axial position of the wheel (26).
  5. Device according to claim 1, characterized in that an adjustable stop (30) is provided for an actuating lever (H).
  6. Device according to claim 5, characterized in that the adjustable stop is formed by a threaded rod (30) which is axially displaceable by means of an externally accessible knurled nut (29).
EP06776707A 2005-08-12 2006-08-09 Method for spraying on pigmented liquids Active EP1912745B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06776707T PL1912745T3 (en) 2005-08-12 2006-08-09 Method for spraying on pigmented liquids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005038162A DE102005038162A1 (en) 2005-08-12 2005-08-12 Device for spraying pigmented liquids
PCT/EP2006/007880 WO2007019997A1 (en) 2005-08-12 2006-08-09 Method for spraying on pigmented liquids

Publications (2)

Publication Number Publication Date
EP1912745A1 EP1912745A1 (en) 2008-04-23
EP1912745B1 true EP1912745B1 (en) 2009-10-14

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EP06776707A Active EP1912745B1 (en) 2005-08-12 2006-08-09 Method for spraying on pigmented liquids

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US (1) US8500043B2 (en)
EP (1) EP1912745B1 (en)
JP (1) JP5011295B2 (en)
KR (1) KR101219229B1 (en)
CN (1) CN101242909B (en)
AT (1) ATE445464T1 (en)
BR (1) BRPI0614564B1 (en)
CA (1) CA2618816C (en)
DE (2) DE102005038162A1 (en)
ES (1) ES2334829T3 (en)
PL (1) PL1912745T3 (en)
WO (1) WO2007019997A1 (en)

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Also Published As

Publication number Publication date
KR101219229B1 (en) 2013-01-18
KR20080033357A (en) 2008-04-16
BRPI0614564B1 (en) 2018-07-03
US20100282868A1 (en) 2010-11-11
CA2618816A1 (en) 2007-02-22
PL1912745T3 (en) 2010-03-31
CN101242909B (en) 2010-06-09
DE102005038162A1 (en) 2007-02-15
DE102005038162A8 (en) 2007-07-05
EP1912745A1 (en) 2008-04-23
US8500043B2 (en) 2013-08-06
WO2007019997A1 (en) 2007-02-22
ATE445464T1 (en) 2009-10-15
JP5011295B2 (en) 2012-08-29
CA2618816C (en) 2013-04-02
DE502006005124D1 (en) 2009-11-26
JP2009504366A (en) 2009-02-05
BRPI0614564A2 (en) 2009-12-01
HK1119116A1 (en) 2009-02-27
CN101242909A (en) 2008-08-13
ES2334829T3 (en) 2010-03-16

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