EP0105493A2 - Nozzle for a spray-gun, especially for a low-pressure spray-gun - Google Patents

Nozzle for a spray-gun, especially for a low-pressure spray-gun Download PDF

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Publication number
EP0105493A2
EP0105493A2 EP83109795A EP83109795A EP0105493A2 EP 0105493 A2 EP0105493 A2 EP 0105493A2 EP 83109795 A EP83109795 A EP 83109795A EP 83109795 A EP83109795 A EP 83109795A EP 0105493 A2 EP0105493 A2 EP 0105493A2
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EP
European Patent Office
Prior art keywords
outlet opening
nozzle
compressed air
paint
nozzle needle
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.)
Withdrawn
Application number
EP83109795A
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German (de)
French (fr)
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EP0105493A3 (en
Inventor
Robert Beckersjürgen
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Individual
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Individual
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Publication date
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Publication of EP0105493A2 publication Critical patent/EP0105493A2/en
Publication of EP0105493A3 publication Critical patent/EP0105493A3/en
Withdrawn legal-status Critical Current

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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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • B05B1/3066—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice the valve element being at least partially hollow and liquid passing through it when the valve is opened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
    • B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
    • B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
    • 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
    • B05B7/0081—Apparatus supplied with low pressure gas, e.g. "hvlp"-guns; air supplied by a fan
    • 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
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0433—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of gas surrounded by an external conduit of liquid upstream the mixing chamber
    • 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 nozzle for a spray gun, in particular low-pressure spray gun, surrounding with a color channel with an outlet opening and with an the outlet orifice ring opening for the exit of the exiting from the exit opening F arbstahl atomizing compressed air, wherein the color channel is coaxial to the discharge opening a Nozzle needle is arranged, which is pressed by a spring into a closed position in which its front end closes the outlet opening, and which is axially movable to release the outlet opening against the pressure of the spring.
  • Such low-pressure spray guns have the advantage that they work with little paint mist. However, they cannot always achieve a sufficiently fine atomization of the paint.
  • a nozzle of the type mentioned at the outset is designed such that at least the front end region of the nozzle needle is hollow and can be connected to the compressed air source.
  • compressed air is thus fed into the area of the outlet opening via the nozzle needle, so that it flows from the paint channel to the outlet opening guided ink jet not only atomizes the ink jet by means of the compressed air emerging from the ring opening, but also additionally by the compressed air from the nozzle needle added coaxially to the ink jet, i.e. compressed air acts both on the outside and inside of the ink jet emerging from the outlet opening and causes a fine atomization. It is essential that the compressed air does not mix with the paint inside the nozzle, so that no foamed paint-air mixture is released.
  • the atomizing effect of the compressed air jet emerging from the nozzle needle is particularly effective when the diameter of the bore provided in the at least front end region of the nozzle needle is equal to the diameter of the outlet opening.
  • the atomizing effect can be increased further in that the outlet opening is formed by a cylindrical wall region extending in the axial direction and the paint channel widens conically at the rear end of the cylindrical wall region.
  • the nozzle shown consists of an outer tubular body 1 and an inner tubular body 2 held coaxially therein.
  • the central opening of the outer nozzle cap 8 is significantly larger than the outlet opening 10 of the inner nozzle cap 9.
  • the front ends of the outer nozzle cap 8 and the inner nozzle cap 9 run in the shape of a truncated cone inward, so that an annular space 13 is formed between them, the diameter of which points in the direction of the front end of the outer nozzle cap 8 is reduced.
  • a nozzle needle 6 is held coaxially, which can be moved back and forth in the axial direction against spring pressure in a manner which is not shown, but is customary, so that it is released when the corresponding one is released Actuating lever is pressed by the spring in the figures to the left in the closed position ( Figure 2). (The deviations in the representation of the left part in FIG. 2 are based on drawing inaccuracies).
  • the nozzle needle 6 has a coaxial inner bore 7, the diameter of which is equal to the diameter of the outlet opening 10.
  • the annular paint channel 5 formed between the nozzle needle 7 and the inner tubular body 2 is connected via a connecting piece 3 to the paint reservoir, to which compressed air is supplied via a line (not shown). Accordingly, compressed air is also supplied to the annular space 4 formed between the inner tubular body 2 and the outer tubular body 1 and the bore 7 of the nozzle needle 6 in the spraying operation.
  • the nozzle needle 6 is shifted to the left in the figures, as is customary in known spray guns, so that it seals the outlet opening 10 from the paint channel 5 (FIG. 2), and then the compressed air supply to the annular space 4 and Hole 7 of the nozzle needle 6 interrupted.

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  • Nozzles (AREA)

Abstract

In a nozzle intended for a spray gun and having an annular opening (13) which surrounds a paint channel (5) with outlet opening (10) for the emergence of compressed air, a coaxially arranged nozzle needle (6) for opening and closing the outlet opening (10) is present in the paint channel (5). The nozzle needle (6) is hollow at least in its end region adjacent to the outlet opening (10) and this hollow space (7) can be connected to the compressed air source. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Düse für eine Spritzpistole, insbesondere Niederdruck-Spritzpistole, mit einem Farbkanal mit einer Austrittsöffnung und mit einer die Austrittsöffnung umgebenden Ringöffnung für den Austritt von den aus der Austrittsöffnung austretenden Farbstahl zerstäubender Druckluft, wobei im Farbkanal koaxial zur Austrittsöffnung eine Düsennadel angeordnet ist, die von einer Feder in eine Schließstellung gedrückt wird, in der ihr vorderes Ende die Austrittsöffnung verschließt, und die zur Freigabe der Austrittsöffnung gegen den Druck der Feder axial bewegbar ist.The invention relates to a nozzle for a spray gun, in particular low-pressure spray gun, surrounding with a color channel with an outlet opening and with an the outlet orifice ring opening for the exit of the exiting from the exit opening F arbstahl atomizing compressed air, wherein the color channel is coaxial to the discharge opening a Nozzle needle is arranged, which is pressed by a spring into a closed position in which its front end closes the outlet opening, and which is axially movable to release the outlet opening against the pressure of the spring.

Derartige Düsen für Spritzpistole sind bekannt. Niederdruck-Spritzpistolen arbeiten mit großen Luftmengen bei niedrigem Druck von etwa 0,2 bis etwa 1 bar. Im Betrieb einer derartigen Spritzpistole wird üblicherweise bei Betätigung eines Griffhebels die Verbindung der Ringöffnung zur Druckluftquelle geöffnet, und erst dann die Verbindung zwischen Farbvorratsbehälter und Farbkanal hergestellt, so daß aus dem mit Druckluft beaufschlagten Farbvorratsbehälter zu versprühende Farbe in den Farbkanal gefördert und aus der Austrittsöffnung herausgedrückt wird. Der austretende Farbstrahl wird von der umgebenden Druckluft mitgerissen und zerstäubt. Kehrt der Griffhebel in seine Ausgangsstellung zurück, so wird zunächst die Verbindung zwischen Farbkanal und Farbvorratsbehälter und danach die Verbindung zwischen Ringöffnung und Druckluftquelle unterbrochen.Such nozzles for spray guns are known. Low pressure spray guns work with large amounts of air at low pressure from about 0.2 to about 1 bar. In the operation of such a spray gun, the connection of the ring opening to the compressed air source is usually opened when a handle lever is actuated, and only then is the connection between the paint reservoir and the paint channel established, so that paint to be sprayed from the compressed air reservoir is conveyed into the paint channel and pressed out of the outlet opening becomes. The emerging ink jet is entrained and atomized by the surrounding compressed air. When the handle returns to its initial position, the connection between the ink duct and the ink reservoir is interrupted and then the connection between the ring opening and the compressed air source.

Derartige Niederdruck-Spritzpistolen haben den Vorteil, das sie mit geringem Farbnebel arbeiten. Mit ihnen kann jedoch nicht immer eine ausreichend feine Zerstäubung der Farbe erreicht werden.Such low-pressure spray guns have the advantage that they work with little paint mist. However, they cannot always achieve a sufficiently fine atomization of the paint.

Es ist Aufgabe der Erfindung, die Düse einer Spritzpistole, insbesondere einer Niederdruck-Spritzpistole derart zu verbessern, daß eine feinere und wirksamere Zerstäubung der Farbe erreicht wird.It is an object of the invention to improve the nozzle of a spray gun, in particular a low-pressure spray gun, in such a way that a finer and more effective atomization of the paint is achieved.

Zur Lösung dieser Aufgabe wird eine Düse der eingangs erwähnten Art erfindungsgemäß derart ausgestaltet, daß zumindest der vordere Endbereich der Düsennadel hohl und mit der Druckluftquelle verbindbar ist.To achieve this object, a nozzle of the type mentioned at the outset is designed such that at least the front end region of the nozzle needle is hollow and can be connected to the compressed air source.

Bei der erfindungsgemäßen Düse wird somit über die Düsennadel Druckluft in den Bereich der Austrittsöffnung geleitet, so daß der vom Farbkanal zur Austrittsöffnung geführte Farbstrahl nicht nur mit Hilfe der aus der Ringöffnung austretenden Druckluft, sondern zusätzlich auch durch die koaxial zum Farbstrahl diesem zugesetzte Druckluft aus der Düsennadel eine Zerstäubung des Farbstrahls bewirkt, d.h. sowohl an der Außenseite als auch im Inneren des aus der Austrittsöffnung austretenden Farbstrahls wirkt Druckluft und bewirkt eine feine Zerstäubung. Dabei ist es wesentlich, daß sich die Druckluft nicht im Inneren der Düse mit der Farbe vermischt, also kein aufgeschäumtes Farb-Luftgemisch abgegeben wird.In the nozzle according to the invention, compressed air is thus fed into the area of the outlet opening via the nozzle needle, so that it flows from the paint channel to the outlet opening guided ink jet not only atomizes the ink jet by means of the compressed air emerging from the ring opening, but also additionally by the compressed air from the nozzle needle added coaxially to the ink jet, i.e. compressed air acts both on the outside and inside of the ink jet emerging from the outlet opening and causes a fine atomization. It is essential that the compressed air does not mix with the paint inside the nozzle, so that no foamed paint-air mixture is released.

Diese wesentliche Verbesserung wird bei der erfindungsgemäßen Düse mit äußerst geringem Konstruktionsaufwand erreicht, weil lediglich die bereits vorhandene Düsennadel hohl ausgebildet und in einer der Verbindung der Ringöffnung mit der Druckluftquelle entsprechenden Weise mit der Druckluftquelle verbunden zu werden braucht, wobei es selbstverständlich möglich ist, die Druckluftzufuhr zur Ringöffnung und zur Bohrung der Düsennadel über ein einziges Ventil zu steuern.This essential improvement is achieved in the nozzle according to the invention with extremely little design effort, because only the nozzle needle already present has to be hollow and has to be connected to the compressed air source in a manner corresponding to the connection of the ring opening to the compressed air source, it being of course possible to supply the compressed air to control the ring opening and the drilling of the nozzle needle via a single valve.

Die Zerstäubungswirkung des aus der Düsennadel austretenden Druckluftstrahls ist besonders wirksam, wenn der Durchmesser der im zumindest vorderen Endbereich der Düsennadel vorgesehenen Bohrung gleich dem Durchmesser der Austrittsöffnung ist.The atomizing effect of the compressed air jet emerging from the nozzle needle is particularly effective when the diameter of the bore provided in the at least front end region of the nozzle needle is equal to the diameter of the outlet opening.

Weiterhin hat sich gezeigt, daß die Zerstäubungswirkung dadurch noch gesteigert werden kann, daß die Austrittsöffnung von einem sich in axialer Richtung erstreckenden zylinderischen Wandbereich gebildet ist und der Farbkanal sich am hinteren Ende des zylinderischen Wandbereichs eine Kante bildend konisch erweitert.Furthermore, it has been shown that the atomizing effect can be increased further in that the outlet opening is formed by a cylindrical wall region extending in the axial direction and the paint channel widens conically at the rear end of the cylindrical wall region.

Bei einer derart geformten Austrittsöffnung wirken sowohl die am Übergang zum Farbkanal vorhandene Kante als auch die am gegenüberliegenden Ende des zylinderischen Wandbereichs vorhandene Kante als Abriß- oder Zerstäubungskanten, wodurch auf den von der Druckluft aus der Düsennadel in Richtung auf die Austrittsöffnung beschleunigten Farbstrahl an zwei Stellen zusätzliche Scherkräfte wirken, die die Zerstäubung fördern.With an outlet opening shaped in this way, both the edge present at the transition to the paint channel and also act the presence at the opposite end of the cylindrical wall portion edge as demolition or Zerstäubungskanten, whereby the accelerated by the compressed air from the nozzle needle in the direction of the outlet opening F arbstrahl in two places additional shear forces act to promote the atomization.

Die Erfindung wird im folgenden anhand der schematisch und stark vereinfacht Teilschnitte durch eine Düse zeigenden Figuren näher erläutert.

  • Figur 1 zeigt die Düse einer Niederdruck-Spritzpistole mit geöffneter Austrittsöffnung;
  • Figur 2 zeigt die Düse aus Figur 1 mit geschlossener Austrittsöffnung.
The invention is explained in more detail below with reference to the schematically and greatly simplified partial sections through the figures showing a nozzle.
  • Figure 1 shows the nozzle of a low pressure spray gun with the outlet opening open;
  • FIG. 2 shows the nozzle from FIG. 1 with the outlet opening closed.

Die dargestellte Düse besteht aus einem äußeren Rohrkörper 1 und einem koaxial in diesem gehalterten inneren Rohrkörper 2. Auf das vordere, also das in den Figuren linke Ende des äußeren Rohrkörpers 1 ist eine eine Mittelöffnung aufweisende äußere Düsenkappe und auf das vordere Ende des inneren Rohrkörpers 2 eine eine Austrittsöffnung 10 aufweisende innere Düsenkappe 9 aufgeschraubt. Die Mittelöffnung der äußeren Düsenkappe 8 ist deutlich größer als die Austrittsöffnung 10 der inneren Düsenkappe 9. Die vorderen Enden von äußerer Düsenkappe 8 und innerer Düsenkappe 9 verlaufen kegelstumpfförmig nach innen, so daß zwischen ihnen ein Ringraum 13 gebildet ist, dessen Durchmesser sich in Richtung auf das vordere Ende der äußeren Düsenkappe 8 verringert.The nozzle shown consists of an outer tubular body 1 and an inner tubular body 2 held coaxially therein. On the front end, that is the left end of the outer tubular body 1 in the figures, there is an outer nozzle cap which has a central opening and on the front end of the inner tubular body 2 an inner nozzle cap 9 having an outlet opening 10 is screwed on. The central opening of the outer nozzle cap 8 is significantly larger than the outlet opening 10 of the inner nozzle cap 9. The front ends of the outer nozzle cap 8 and the inner nozzle cap 9 run in the shape of a truncated cone inward, so that an annular space 13 is formed between them, the diameter of which points in the direction of the front end of the outer nozzle cap 8 is reduced.

Im inneren Rohrkörper 2 ist koaxial eine Düsennadel 6 gehaltert, die in nicht dargestellter, jedoch üblicher Weise in axialer Richtung gegen Federdruck hin- und herbewegbar ist, so daß sie bei Freigabe des entsprechenden Betätigungshebels von der Feder in den Figuren nach links in die Schließstellung (Figur 2) gedrückt wird. (Die Abweichungen in der Darstellung des linken Teils in Figur 2 beruhen auf zeichnerischen Ungenauigkeiten). Die Düsennadel 6 weist eine koaxial verlaufende Innenbohrung 7 auf, deren Durchmesser gleich dem Durchmesser der Austrittsöffnung 10 ist.In the inner tubular body 2, a nozzle needle 6 is held coaxially, which can be moved back and forth in the axial direction against spring pressure in a manner which is not shown, but is customary, so that it is released when the corresponding one is released Actuating lever is pressed by the spring in the figures to the left in the closed position (Figure 2). (The deviations in the representation of the left part in FIG. 2 are based on drawing inaccuracies). The nozzle needle 6 has a coaxial inner bore 7, the diameter of which is equal to the diameter of the outlet opening 10.

Der zwischen Düsennadel 7 und innerem Rohrkörper 2 gebildete, ringförmige Farbkanal 5 ist über einen Anschlußstutzen 3 mit dem Farbvorratsbehälter verbunden, dem über eine nicht dargestellte Leitung Druckluft zugeführt wird. Entsprechend werden im Spritzbetrieb auch dem zwischen inneren Rohrkörper 2 und äußerem Rohrkörper 1 gebildeten Ringraum 4 sowie der Bohrung 7 der Düsennadel 6 Druckluft zugeführt.The annular paint channel 5 formed between the nozzle needle 7 and the inner tubular body 2 is connected via a connecting piece 3 to the paint reservoir, to which compressed air is supplied via a line (not shown). Accordingly, compressed air is also supplied to the annular space 4 formed between the inner tubular body 2 and the outer tubular body 1 and the bore 7 of the nozzle needle 6 in the spraying operation.

In der in Figur 1 gezeigten Stellung wird somit Farbe in den Farbkanal 5 und aus der Austrittsöffnung 10 gedrückt, wobei die dem Farbkanal 5 zugeführte Farbe bei Erreichen des vorderen Endbereichs der Düsennadel 6 von der durch die Bohrung 7 zugeführten Druckluft erheblich beschleunigt wird. Da der Durchmesser der Bohrung 7 gleich dem Durchmesser der Austrittsöffnung 10 ist, wirkt die Druckluft sofort auf die Farbe, wenn diese in den Bereich der hinteren Kante 11 der eine zylinderische Begrenzungswand aufweisenden Austrittsöffnung 10 kommt. Dadurch wird die Farbe über diese Kante 11 beschleunigt und eine erhebliche Scherwirkung ausgeübt. Diese Scherwirkung wiederholt sich, wenn die Farbe die vordere Kante 12 der Austrittsöffnung 10 erreicht hat, wo sie dann auch in den Einflußbereich der aus dem Ringraum 13 austretenden Druckluft gerät.In the position shown in FIG. 1, paint is thus pressed into the paint channel 5 and out of the outlet opening 10, the paint supplied to the paint channel 5 being considerably accelerated by the compressed air supplied through the bore 7 when the front end region of the nozzle needle 6 is reached. Since the diameter of the bore 7 is equal to the diameter of the outlet opening 10, the compressed air acts immediately on the paint when it comes into the area of the rear edge 11 of the outlet opening 10 which has a cylindrical boundary wall. This accelerates the color over this edge 11 and exerts a considerable shear effect. This shear effect is repeated when the paint has reached the front edge 12 of the outlet opening 10, where it then also comes into the area of influence of the compressed air emerging from the annular space 13.

Da somit die Farbe sowohl von der durch die Bohrung 7 der Düsennadel 6 als auch von der durch den Ringraum 13 zugeführten Druckluft zerstäubt wird und diese Zerstäubung noch durch die beiden aufeinander folgenden Kanten - 11 und 12 der Austrittsöffnung 10 gefördert wird, ergibt sich eine sehr feine Zerstäubung, wie sie bisher mit Niederdruck- Spritzpistolen nicht zu erreichen war.Since the paint is thus atomized both by the bore 7 of the nozzle needle 6 and by the compressed air supplied through the annular space 13 and this atomization is further promoted by the two successive edges 11 and 12 of the outlet opening 10, a very good result fine atomization that was previously not possible with low pressure spray guns.

Um den Spritzvorgang zu beenden, wird, wie bei bekannten Spritzpistolen üblich, die Düsennadel 6 in den Figuren nach links verlagert, so daß sie die Austrittsöffnung 10 gegenüber dem Farbkanal 5 abdichtet (Figur 2), und danach wird die Druckluftzufuhr zum Ringraum 4 und zur Bohrung 7 der Düsennadel 6 unterbrochen.To end the spraying process, the nozzle needle 6 is shifted to the left in the figures, as is customary in known spray guns, so that it seals the outlet opening 10 from the paint channel 5 (FIG. 2), and then the compressed air supply to the annular space 4 and Hole 7 of the nozzle needle 6 interrupted.

Claims (3)

1. Düse für eine Spritzpistole, insbesondere Niederdruck-Spritzpistole, mit einem Farbkanal (5) mit einer Austrittsöffnung (10) und mit einer die Austrittsöffnung (10) umgebende Ringöffnung (13) für den Austritt von den aus der Austrittsöffnung (10) austretenden Farbstrahl zerstäubender Druckluft, wobei im Farbkanal (5) koaxial zur Austrittsöffnung (10) eine Düsennadel (6) angeordnet ist, die von einer Feder in eine Schließstellung gedrückt wird, in der ihr vorderes Ende die Austrittsöffnung (10) verschließt, und die zur Freigabe der Austrittsöffnung (10) gegen den Druck der Feder axial bewegbar ist, dadurch gekennzeichnet, daß zumindest der vordere Endbereich der Düsennadel (6) hohl und mit der Druckluftquelle verbindbar ist.1. Nozzle for a spray gun, in particular low-pressure spray gun, with a paint channel (5) with an outlet opening (10) and with an annular opening (13) surrounding the outlet opening (10) for the exit from the paint jet emerging from the outlet opening (10) atomizing compressed air, wherein in the paint channel (5) coaxial to the outlet opening (10) a nozzle needle (6) is arranged, which is pressed by a spring into a closed position in which its front end closes the outlet opening (10), and which to release the Outlet opening (10) can be moved axially against the pressure of the spring, characterized in that at least the front end region of the nozzle needle (6) is hollow and can be connected to the compressed air source. 2. Düse nach Anspruch 1, dadurch gekennzeichnet, daß der Durchmesser der im zumindest vorderen Endbereich der Düsennadel (6) vorgesehenen Bohrung (7) gleich dem Durchmesser der Austrittsöffnung (10) ist.2. Nozzle according to claim 1, characterized in that the diameter of the bore (7) provided in the at least front end region of the nozzle needle (6) is equal to the diameter of the outlet opening (10). 3. Düse nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Austrittsöffnung (10) von einem sich in axialer Richtung erstreckenden, zylinderischen Wandbereich gebildet ist und daß sich der Farbkanal (5) am hinteren Ende des zylinderischen Wandbereichs eine Kante (12) bildend konisch erweitert.3. Nozzle according to claim 1 or 2, characterized in that the outlet opening (10) is formed by an axially extending, cylindrical wall region and that the paint channel (5) at the rear end of the cylindrical wall region forms an edge (12) flared.
EP83109795A 1982-09-30 1983-09-30 Nozzle for a spray-gun, especially for a low-pressure spray-gun Withdrawn EP0105493A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19828227445U DE8227445U1 (en) 1982-09-30 1982-09-30 NOZZLE UNIT, WITH TWO TAKE-OFF EDGES
DE8227445U 1982-09-30

Publications (2)

Publication Number Publication Date
EP0105493A2 true EP0105493A2 (en) 1984-04-18
EP0105493A3 EP0105493A3 (en) 1985-08-21

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EP83109795A Withdrawn EP0105493A3 (en) 1982-09-30 1983-09-30 Nozzle for a spray-gun, especially for a low-pressure spray-gun

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DE (1) DE8227445U1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192390A2 (en) * 1985-02-19 1986-08-27 Junkosha Co. Ltd. Apparatus and method for surface treatment
DE3824887A1 (en) * 1988-07-22 1990-01-25 Castolin Gmbh Nozzle for flame-spray burner
GB2227433A (en) * 1988-11-02 1990-08-01 United Technologies Corp Gas assisted liquid atomizer
US5090619A (en) * 1990-08-29 1992-02-25 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
EP0669100A1 (en) * 1994-02-28 1995-08-30 IMMUNO Aktiengesellschaft Application device for multi-component tissue adhesive
EP0682986A2 (en) * 1994-05-11 1995-11-22 F.LLI TALAMONTI MACCHINE S.n.c. Improved spray gun for glue applications
EP0755720A1 (en) * 1995-07-28 1997-01-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for spraying a liquid
FR2779805A1 (en) 1998-06-15 1999-12-17 Air Liquide FOG INJECTOR FOR FUEL BURNER AND BURNER PROVIDED WITH SUCH INJECTOR
US6860870B2 (en) 1998-09-17 2005-03-01 Focal, Inc. Self-cleaning fluid delivery device for medical applications
ES2243122A1 (en) * 2003-12-01 2005-11-16 Manuel Agullo Carbonell (Titular Al 50%) Venturi effect based paint gun includes an actuator with a pipe admitting a second paint component into the spray gun
US7217254B2 (en) 2002-09-20 2007-05-15 Genzyme Corporation Multi-pressure biocompatible agent delivery device and method
WO2010151666A1 (en) * 2009-06-25 2010-12-29 E. I. Du Pont De Nemours And Company Spray device and use thereof
WO2010151762A1 (en) * 2009-06-25 2010-12-29 E. I. Du Pont De Nemours And Company Spray method and use thereof
WO2016140683A1 (en) * 2015-03-05 2016-09-09 Axalta Coating Systems Ip Co., Llc Spray gun with a hollow needle to assure gravity feed and method for use thereof
CN108031579A (en) * 2018-01-22 2018-05-15 中国科学技术大学 Spray gun and its pipette tips, aerial spraying device
CN112264211A (en) * 2020-10-16 2021-01-26 易忠萍 Cloud platform atomizer is used to dry fog presses down dirt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536007A1 (en) * 1974-09-10 1976-03-25 Sig Schweiz Industrieges Drip free glue spray nozzle - includes axially movable needle actuated by pneumatic piston
GB2063713A (en) * 1979-11-15 1981-06-10 Devilbiss Europa Gmbh Spray guns

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2536007A1 (en) * 1974-09-10 1976-03-25 Sig Schweiz Industrieges Drip free glue spray nozzle - includes axially movable needle actuated by pneumatic piston
GB2063713A (en) * 1979-11-15 1981-06-10 Devilbiss Europa Gmbh Spray guns

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0192390A3 (en) * 1985-02-19 1987-05-06 Junkosha Co. Ltd. Apparatus and method for surface treatment
EP0192390A2 (en) * 1985-02-19 1986-08-27 Junkosha Co. Ltd. Apparatus and method for surface treatment
DE3824887A1 (en) * 1988-07-22 1990-01-25 Castolin Gmbh Nozzle for flame-spray burner
GB2227433A (en) * 1988-11-02 1990-08-01 United Technologies Corp Gas assisted liquid atomizer
US5090619A (en) * 1990-08-29 1992-02-25 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
WO1992004585A1 (en) * 1990-08-29 1992-03-19 Pinnacle Innovations Snow gun having optimized mixing of compressed air and water flows
US5665067A (en) * 1994-02-28 1997-09-09 Immuno Aktiengesellschaft Apparatus for applying a multiple-component tissue adhesive
EP0669100A1 (en) * 1994-02-28 1995-08-30 IMMUNO Aktiengesellschaft Application device for multi-component tissue adhesive
EP0682986A2 (en) * 1994-05-11 1995-11-22 F.LLI TALAMONTI MACCHINE S.n.c. Improved spray gun for glue applications
EP0682986A3 (en) * 1994-05-11 1997-12-17 F.LLI TALAMONTI MACCHINE S.n.c. Improved spray gun for glue applications
US5873524A (en) * 1995-07-28 1999-02-23 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and device for spraying a liquid product
FR2737138A1 (en) * 1995-07-28 1997-01-31 Air Liquide METHOD AND DEVICE FOR SPRAYING A LIQUID PRODUCT
EP0755720A1 (en) * 1995-07-28 1997-01-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for spraying a liquid
AU702850B2 (en) * 1995-07-28 1999-03-04 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and device for spraying a liquid product
FR2779805A1 (en) 1998-06-15 1999-12-17 Air Liquide FOG INJECTOR FOR FUEL BURNER AND BURNER PROVIDED WITH SUCH INJECTOR
US6860870B2 (en) 1998-09-17 2005-03-01 Focal, Inc. Self-cleaning fluid delivery device for medical applications
US7217254B2 (en) 2002-09-20 2007-05-15 Genzyme Corporation Multi-pressure biocompatible agent delivery device and method
ES2243122A1 (en) * 2003-12-01 2005-11-16 Manuel Agullo Carbonell (Titular Al 50%) Venturi effect based paint gun includes an actuator with a pipe admitting a second paint component into the spray gun
WO2010151762A1 (en) * 2009-06-25 2010-12-29 E. I. Du Pont De Nemours And Company Spray method and use thereof
WO2010151666A1 (en) * 2009-06-25 2010-12-29 E. I. Du Pont De Nemours And Company Spray device and use thereof
CN102458676A (en) * 2009-06-25 2012-05-16 纳幕尔杜邦公司 Spray device and use thereof
CN102458671A (en) * 2009-06-25 2012-05-16 纳幕尔杜邦公司 Spray method and use thereof
US9233484B2 (en) 2009-06-25 2016-01-12 Axalta Coating Systems Ip Co., Llc Spray device and use thereof
WO2016140683A1 (en) * 2015-03-05 2016-09-09 Axalta Coating Systems Ip Co., Llc Spray gun with a hollow needle to assure gravity feed and method for use thereof
CN108031579A (en) * 2018-01-22 2018-05-15 中国科学技术大学 Spray gun and its pipette tips, aerial spraying device
CN112264211A (en) * 2020-10-16 2021-01-26 易忠萍 Cloud platform atomizer is used to dry fog presses down dirt
CN112264211B (en) * 2020-10-16 2022-02-18 刘春平 Cloud platform atomizer is used to dry fog presses down dirt

Also Published As

Publication number Publication date
EP0105493A3 (en) 1985-08-21
DE8227445U1 (en) 1983-01-05

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