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EP1294490A1 - Spray pistol - Google Patents

Spray pistol

Info

Publication number
EP1294490A1
EP1294490A1 EP01967097A EP01967097A EP1294490A1 EP 1294490 A1 EP1294490 A1 EP 1294490A1 EP 01967097 A EP01967097 A EP 01967097A EP 01967097 A EP01967097 A EP 01967097A EP 1294490 A1 EP1294490 A1 EP 1294490A1
Authority
EP
European Patent Office
Prior art keywords
pressure
spray gun
air supply
gun according
compressed air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01967097A
Other languages
German (de)
French (fr)
Other versions
EP1294490B1 (en
Inventor
Ewald Schmon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SATA GmbH and Co KG
Original Assignee
SATA GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SATA GmbH and Co KG filed Critical SATA GmbH and Co KG
Publication of EP1294490A1 publication Critical patent/EP1294490A1/en
Application granted granted Critical
Publication of EP1294490B1 publication Critical patent/EP1294490B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B05B12/004—Arrangements for controlling delivery; Arrangements for controlling the spray area comprising sensors for monitoring the delivery, e.g. by displaying the sensed value or generating an alarm
    • B05B12/006—Pressure or flow rate sensors
    • B05B12/008—Pressure or flow rate sensors integrated in or attached to a discharge apparatus, e.g. a spray gun
    • 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
    • B05B7/2478—Gun with a container which, in normal use, is located above the gun
    • 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
    • B05B15/62—Arrangements for supporting spraying apparatus, e.g. suction cups
    • 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

Definitions

  • the invention relates to a paint spray gun according to the preamble of claim 1.
  • a spray pressure that is too low can e.g. lead to color changes in the base coat, to an increase in the structure of the orange peel in the clear coat and uni-coat and to a reduction in the working speed and possibly the jet width.
  • too high a spray pressure can result in excessive spraying of the spray material and thus lead to greater losses and undesirable stress on the working environment.
  • the available pressure should also be monitored during the spraying process, e.g. recognize a possible pressure drop due to additional consumers in the compressed air line network or a pressure increase due to the connection of resources.
  • the spray gun is therefore often preceded by a pressure control valve with a pressure gauge.
  • the pressure that can be set using a control button on the pressure control valve can be read on the pressure gauge.
  • this pressure regulating valve with a manometer arranged at the air inlet of the paint spray gun leads to an extension of the spray gun, as a result of which its handiness is impaired.
  • the pressure gauge or pressure control valve leads to a drop in pressure as a result of the internal deflections.
  • the pressure control valve which is usually screwed on, must be dismantled for cleaning the spray gun in washing machines or cleaning basins, since the accuracy of the display of the pressure gauge can be impaired by penetrating solvent or paint or paint residues.
  • the pressure control valve with the manometer must therefore be unscrewed during each cleaning process, which is associated with a considerable amount of work.
  • Paint spray guns are also known which have a connection on the underside of the handle for coupling a conventional pressure gauge.
  • the pressure gauges commonly used usually have a semicircular or helical bent tubular steel spring as the pressure transducer, the change in shape caused by the pressure is indicated by a pointer on a corresponding clock face.
  • the tubular steel spring and the display device are housed in a separate housing.
  • the handling of the spray gun is impaired by the coupled pressure gauge.
  • the pressure gauges must also be removable for cleaning the paint spray gun, so that relatively complex coupling or connection systems are required for connecting the pressure gauge to the spray gun.
  • the object of the invention is to provide a compact and handy spray gun with a pressure measuring device which is easy to monitor during spraying.
  • the pressure measuring device is integrated in the device for regulating the compressed air supply. This allows a very compact and space-saving way to combine fine adjustment of the air intake and pressure measurement with a corresponding display.
  • a display device which can be designed as an analog or digital display is arranged on an actuator of the pressure regulating device in such a way that it can be read from the rear. This has the advantage that the pressure display is always in view when spraying.
  • the pressure transducer is only connected to the compressed air supply channel via a capillary and is otherwise together with the other components the pressure measuring device hermetically sealed to the outside.
  • This capillary can prevent the solvents, paint or paint residues used to clean the spray gun from getting into the area of the pressure transducer and thus impairing or preventing proper pressure measurement.
  • the paint spray gun according to the invention can thus be cleaned without dismantling the measuring device, there being no danger for the generally sensitive pressure transducer.
  • Fig. 1 a partially sectioned side view of a spray gun according to the invention
  • FIG. 2 a rear view of the spray gun from FIG. 1.
  • the spray gun shown in FIGS. 1 and 2 contains a gun body 1 with a handle 2 and an upper part 3, on which a suspension hook 4 is formed.
  • a through hole 5 runs continuously from front to back and in which a nozzle needle 6 is guided axially displaceably.
  • the through-hole 5 forms an enlarged receiving space 7, into which an oblique inlet hole 8 opens for the attachment of an ink-receiving container (not shown).
  • a nozzle arrangement 9 is mounted, which contains a paint nozzle 10 which can be fixed by means of a thread on the upper part 3 of the gun body 1.
  • the paint nozzle 10 has at its front end a nozzle bore 11 which, together with a tapering front end part of the nozzle needle 6, which can be moved axially via an actuating lever 12, forms an adjustable inlet for the paint, the lacquer or the like.
  • the actuating lever 12 is connected to the nozzle needle 6 in such a way that when the actuating lever 12 is pulled back, it is displaced backwards against the force of a spring 13 and the nozzle bore 11 opens to deliver the paint.
  • the prestress of the compression spring 13 can be adjusted via an adjusting screw 14 arranged at the rear end of the through bore 5 with a corresponding lock nut 15.
  • a valve arrangement 17 for controlling the air supply to the nozzle arrangement 9 can also be actuated by the actuating lever 12 via a rod 16.
  • the valve arrangement 17 contains a closing cone 18 connected to the rod 16 and a valve seat 20 provided in a bore 19 in the gun body 1, against which the closing cone 18 is pressed by a spring 21.
  • the closing cone 18 is lifted against the force of the spring 21 via the rod 16 from the valve seat 20, a connection between a lower part 22 located upstream of the valve arrangement 17 and an upper part 23 of a compressed air supply duct located downstream of the valve arrangement 17 the compressed air supply to the nozzle arrangement 9 is opened.
  • a compressed air connection 24 for a compressed air line is arranged, which is connected to the lower part 22 of the drain air supply channel.
  • the compressed air is conducted from the upper part 23 of the dry air supply duct to an air guide system 25 and from there to an annular gap 26 which surrounds the nozzle bore 11.
  • the compressed air creates a vacuum in the area of the nozzle bore 11, through which the paint is sucked out of the nozzle bore 11 and entrained with the compressed air to form a round jet.
  • the compressed air for shaping the round jet can also emerge into a flat jet via so-called hom air bores 27 in projecting horns 28 of an air cap 29 surrounding the paint nozzle 10.
  • the air cap 29 can be fastened to the upper part 3 of the housing 1 via a union nut 30.
  • a device for regulating the intake air is also arranged.
  • This device contains a rotatable sleeve 31, which has a transverse bore 32 in the region of the junction of the lower part 22 of the compressed air supply duct in the bore 19.
  • the sleeve 31 is rotatably connected to a rear receiving part 33 which is rotatably arranged at the rear end of the bore 19. By rotating the receiving part 33, the sleeve 31 can thus also be rotated and the air passage in the region of the transverse bore 32 can thus be regulated.
  • the pressure detection chamber 34 is connected to the compressed air supply channel via a capillary 36 running in the axial direction of the receiving part 33. Via the capillary 36, the pressure in the part 22 of the compressed air supply duct located upstream of the valve arrangement can be affected without impairment can be detected by check valves or the like.
  • the capillary 36 can also prevent a cleaning agent or solvent used in the cleaning of the spray gun and possibly dissolved paint or varnish particles from reaching the pressure detection chamber 34 via the dry air supply channel and there impairing the measuring accuracy or even leading to a measurement prevent.
  • This capillary 36 expediently has a diameter between 0.5 and 1.8 mm.
  • a housing 37 is also fastened to the receiving part 35, in which a circuit arrangement 38 for converting and / or evaluating the signals of the drain detector 35, a battery (not shown) for the power supply and a digital display device 39 shown in FIG. 2 is accommodated.
  • the connection between the receiving part 35 and the housing 37 is completely sealed, so that no cleaning agent or the like reaches the sensitive components of the pressure measuring device.
  • the housing 37 is expediently designed as a rotary knob. As a result, the device for regulating the compressed air supply and the pressure measuring device can be combined in a very compact and space-saving manner.
  • the invention is not limited to the embodiment described above and shown in the drawing.
  • other suitable pressure transducers or pressure sensors can also be used.
  • the pressure transducers can also be attached at other suitable locations.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Nozzles (AREA)

Abstract

The invention relates to a spray pistol comprising a pistol body (1); a nozzle system (9) which is arranged on the pistol body (1); a compressed air supply channel (22, 23) which is arranged in the pistol body (1) and which comprises a valve system (17) for controlling the supply of compressed air to the nozzle system (9); a regulating device (6, 13) for regulating the supply of the substance to be sprayed; an actuating element (12) for actuating the valve system (17) and the regulating device (6, 13); a device (31, 33, 37) for regulating the supply of compressed air to the nozzle system (9); and a pressure-measuring device (35, 38, 39) for detecting and indicating the pressure in the compressed air supply channel (22, 23). The aim of the invention is to create a compact and handy spray pistol comprising a pressure-measuring device which is easy to monitor when spraying. In order to achieve this, the pressure-measuring device (35, 38, 39) is integrated into the device (31, 33, 37) used to regulate the compressed air supply.

Description

Spritzpistole spray gun
Die Erfindung betrifft eine Farbspritzpistole nach dem Oberbegriff des Anspruches 1.The invention relates to a paint spray gun according to the preamble of claim 1.
Beim Arbeiten mit einer Spritzpistole ist es äußerst wichtig, den Spritzdruck derart einzustellen, daß sich eine optimale Zerstäubung für ein optimales Arbeitsergebnis bei guter Arbeitsgeschwindigkeit und hohem Auftragswirkungsgrad ergibt. Ein zu niedriger Spritzdruck kann z.B. zu Farbtonveränderungen im Basislack, zu einer Erhöhung der Orangenhautstruktur im Klarlack und Unilack und zu einer Reduzierung der Arbeitsgeschwindigkeit sowie eventuell der Strahlbreite fuhren. Auf der anderen Seite kann ein zu hoher Spritzdruck eine zu große Vernebelung des Spritzmaterials zu Folge haben und damit zu größeren Verlusten und unerwünschter Belastung der Arbeitsumgebung führen. Auch während des Spritzvorgangs sollte der zur Verfügung stehende Druck überwacht werden, um so z.B. einen möglichen Druckabfall durch zusätzliche Verbraucher im Druckluftleitungsnetz oder einen Druckanstieg durch Zuschalten von Ressourcen zu erkennen.When working with a spray gun, it is extremely important to set the spray pressure in such a way that optimum atomization results for an optimal work result with good working speed and high application efficiency. A spray pressure that is too low can e.g. lead to color changes in the base coat, to an increase in the structure of the orange peel in the clear coat and uni-coat and to a reduction in the working speed and possibly the jet width. On the other hand, too high a spray pressure can result in excessive spraying of the spray material and thus lead to greater losses and undesirable stress on the working environment. The available pressure should also be monitored during the spraying process, e.g. recognize a possible pressure drop due to additional consumers in the compressed air line network or a pressure increase due to the connection of resources.
Zur Einstellung und Überwachung des Spritzdrucks wird der Spritzpistole daher vielfach ein Druckregelventil mit Manometer vorgeschaltet. An dem Manometer kann der über einen Stellknopf am Druckregelventil einstellbare Druck abgelesen werden. Dieses am Lufteingang der Farbspritzpistole angeordnete Druckregelventil mit Manometer fuhrt jedoch zu einer Verlängerung der Spritzpistole, wodurch deren Handlichkeit verschlechtert wird. Außerdem führt das Manometer bzw. das Druckregelventil infolge der inneren Umlenkungen zu einem Druckabfall. Darüber hinaus muß das in der Regel angeschraubte Druckregelventil zum Reinigen der Spritzpistole in Waschgeräten oder Reinigungsbecken abgebaut werden, da die Anzeigegenauigkeit des Manometers durch eindringendes Lösungsmittel oder Lack- bzw. Farbreste beeinträchtigt werden kann. Das Druckregelventil mit dem Manometer muß daher bei jedem Reinigungsvorgang abgeschraubt werden, was mit einem erheblichen Arbeitsaufwand verbunden ist.To adjust and monitor the spray pressure, the spray gun is therefore often preceded by a pressure control valve with a pressure gauge. The pressure that can be set using a control button on the pressure control valve can be read on the pressure gauge. However, this pressure regulating valve with a manometer arranged at the air inlet of the paint spray gun leads to an extension of the spray gun, as a result of which its handiness is impaired. In addition, the pressure gauge or pressure control valve leads to a drop in pressure as a result of the internal deflections. In addition, the pressure control valve, which is usually screwed on, must be dismantled for cleaning the spray gun in washing machines or cleaning basins, since the accuracy of the display of the pressure gauge can be impaired by penetrating solvent or paint or paint residues. The pressure control valve with the manometer must therefore be unscrewed during each cleaning process, which is associated with a considerable amount of work.
Es sind auch bereits Farbspritzpistolen bekannt, die an der Griffunterseite einen Anschluß zum Ankuppeln eines konventionellen Manometers aufweisen. Die üblicherweise verwendeten Manometer weisen als Druckaufhehmer in der Regel eine halbkreis- oder wendeiförmig gebogene Stahlrohrfeder auf, deren durch den Druck bedingte Formänderung über einen Zeiger auf einem entsprechenden Ziffernblatt angezeigt wird. Die Stahlrohrfeder und die Anzeigeeinrichtung sind in einem gesonderten Gehäuse untergebracht. Auch bei dieser Ausführung wird jedoch die Handhabung der Spritzpistole durch das angekuppelte Manometer beeinträchtigt. Die Manometer müssen darüber hinaus zur Reinigung der Farbspritzpistole abnehmbar sein, so daß relativ aufwendige Kupplungs- oder Verbindungsysteme für den Anschluß des Manometers an die Spritzpistole erforderlich sind.Paint spray guns are also known which have a connection on the underside of the handle for coupling a conventional pressure gauge. The pressure gauges commonly used usually have a semicircular or helical bent tubular steel spring as the pressure transducer, the change in shape caused by the pressure is indicated by a pointer on a corresponding clock face. The tubular steel spring and the display device are housed in a separate housing. In this version, too, the handling of the spray gun is impaired by the coupled pressure gauge. The pressure gauges must also be removable for cleaning the paint spray gun, so that relatively complex coupling or connection systems are required for connecting the pressure gauge to the spray gun.
Es wurde auch bereits vorgeschlagen, an einer Seite des Pistolenkörpers ein konventionelles Manometer anzubringen. Auch eine derartige Spritzpistole weist durch das seitlich vorstehende Manometer eine schlechtere Handlichkeit auf. Außerdem muß eine solche Spritzpistole mit äußerster Sorgfalt behandelt werden, damit das seitlich angebrachte Manometer beim Ablegen der Spritzpistole nicht beschädigt wird.It has also been proposed to attach a conventional pressure gauge to one side of the gun body. Such a spray gun is also less manageable due to the laterally protruding manometer. In addition, such a spray gun must be handled with the utmost care so that the pressure gauge attached to the side is not damaged when the spray gun is put down.
Aufgabe der Erfindung ist es, eine kompakte und handliche Spritzpistole mit einer während des Spritzens einfach zu überwachenden Druckmeßeinrichtung zu schaffen.The object of the invention is to provide a compact and handy spray gun with a pressure measuring device which is easy to monitor during spraying.
Diese Aufgabe wird erfindungsgemäß durch eine Spritzpistole mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved according to the invention by a spray gun with the features of claim 1.
Bei der erfindungsgemäßen Spritzpistole ist die Druckmeßeinrichtung in die Einrichtung zur Regulierung der Druckluftzufuhr integriert. Dadurch kann auf sehr kompakte und platzsparende Weise eine Feineinstellung der Drackluftzufuhr und eine Druckmessung mit entsprechender Anzeige kombiniert werden.In the spray gun according to the invention, the pressure measuring device is integrated in the device for regulating the compressed air supply. This allows a very compact and space-saving way to combine fine adjustment of the air intake and pressure measurement with a corresponding display.
Vorteilhafte Ausfuhrungsformen und zweckmäßige Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments and expedient developments of the invention are specified in the subclaims.
So ist in einer besonders zweckmäßigen Ausführung eine als Analog- oder Digitalanzeige ausführbare Anzeigeeinrichtung derart an einem Stellglied der Druckreguliereinrichtung angeordnet, daß sie von hinten ablesbar ist. Dadurch ergibt sich der Vorteil, daß die Druckanzeige beim Spritzen immer im Blickfeld ist.In a particularly expedient embodiment, a display device which can be designed as an analog or digital display is arranged on an actuator of the pressure regulating device in such a way that it can be read from the rear. This has the advantage that the pressure display is always in view when spraying.
In einer geschützten Ausführung steht der Druckaufhehmer nur über eine Kapillare mit dem Druckluftzufuhrkanal in Verbindung und ist ansonsten zusammen mit den anderen Bauteilen der Druckmeßeinrichtung nach außen hermetisch abgedichtet. Durch diese Kapillare kann verhindert werden, daß die zur Reinigung der Spritzpistole verwendeten Lösemittel, Lackoder Farbreste in den Bereich des Druckaufhehmers gelangen und damit eine ordnungsgemäße Druckmessung beeinträchtigen oder verhindern. Die erfindungsgemäße Farbspritzpistole kann so ohne Demontage der Meßeinrichtung gereinigt werden, wobei keine Gefahr für den im allgemeinen empfindlichen Druckaufhehmer besteht.In a protected version, the pressure transducer is only connected to the compressed air supply channel via a capillary and is otherwise together with the other components the pressure measuring device hermetically sealed to the outside. This capillary can prevent the solvents, paint or paint residues used to clean the spray gun from getting into the area of the pressure transducer and thus impairing or preventing proper pressure measurement. The paint spray gun according to the invention can thus be cleaned without dismantling the measuring device, there being no danger for the generally sensitive pressure transducer.
Weitere Besonderheiten und Vorzüge der Erfindung ergeben sich aus der folgenden Beschreibung eines vorteilhaften Ausf hrungsbeispiels anhand der Zeichnung. Es zeigen:Further special features and advantages of the invention result from the following description of an advantageous exemplary embodiment with reference to the drawing. Show it:
Fig. 1 : eine zum Teil geschnittene Seitenansicht einer erfindungsgemäßen Spritzpistole undFig. 1: a partially sectioned side view of a spray gun according to the invention and
Fig. 2: eine Rückansicht der Spritzpistole von Fig. 1.FIG. 2: a rear view of the spray gun from FIG. 1.
Die in den Fig. 1 und 2 dargestellte Spritzpistole enthält einen Pistolenkörper 1 mit einem Handgriff 2 und einem Oberteil 3, an dem ein Aufhängehaken 4 angeformt ist. Durch das Oberteil 3 verläuft eine von vorne nach hinten durchgehende und mehrfach abgestufte Durchgangsbohrung 5, in der eine Düsennadel 6 axial verschiebbar geführt ist. Die Durchgangsbohrung 5 bildet in einem vorderen Bereich einen erweiterten Aufhahmeraum 7, in den eine schräge Zulaufbohrung 8 zum Aufsatz eines nicht dargestellten Farbaufhahmebehälters mündet. An dem vorderen Ende der Durchgangsbohrung 5 ist eine Düsenanordnung 9 montiert, die eine mittels eines Gewindes am Oberteil 3 des Pistolenkörpers 1 fixierbare Farbdüse 10 enthält. Die Farbdüse 10 weist an ihrem vorderen Ende eine Düsenbohrung 11 auf, die zusammen mit einem spitz zulaufenden vorderen Endteil der über einen Betätigungshebel 12 axial bewegbaren Düsennadel 6 einen regulierbaren Zulauf für die Farbe, den Lack oder dgl. bildet. Der Betätigungshebel 12 ist derart mit der Düsennadel 6 verbunden, daß diese beim Zurückziehen des Betätigungshebels 12 entgegen der Kraft einer Feder 13 nach hinten verschoben wird und die Düsenbohrung 11 zur Abgabe der Farbe öffnet. Über eine am hinteren Ende der Durchgangsbohrung 5 angeordnete Stellschraube 14 mit entsprechender Kontermutter 15 ist die Vorspannung der Druckfeder 13 einstellbar. Durch den Betätigungshebel 12 ist über eine Stange 16 außerdem eine Ventilanordnung 17 zur Steuerung der Drackluftzufuhr zur Düsenanordnung 9 betätigbar. Die Ventilanordung 17 enthält einen mit der Stange 16 verbundenen Schließkegel 18 und einen in einer Bohrung 19 im Pistolenkörper 1 vorgesehenen Ventilsitz 20, gegen den der Schließkegel 18 durch eine Feder 21 gedrückt wird. Beim Zurückziehen des Betätigungshebels 12 wird der Schließkegel 18 entgegen der Kraft der Feder 21 über die Stange 16 vom Ventilsitz 20 abgehoben, wobei eine Verbindung zwischen einem stromaufwärts der Ventilanordnung 17 gelegenen unteren Teil 22 und einem stromabwärts der Ventilanordnung 17 gelegenen oberen Teil 23 eines Druckluftzufuhrkanals für die Druckluftzufuhr zur Düsenanordnung 9 geöffnet wird. An der Unterseite des Handgriffs 2 ist ein mit dem unteren Teil 22 des Drackluftzufuhrkanals in Verbindung stehender Druckluftanschluß 24 für eine Druckluftleitung angeordnet.The spray gun shown in FIGS. 1 and 2 contains a gun body 1 with a handle 2 and an upper part 3, on which a suspension hook 4 is formed. Through the upper part 3 a through hole 5 runs continuously from front to back and in which a nozzle needle 6 is guided axially displaceably. In a front area, the through-hole 5 forms an enlarged receiving space 7, into which an oblique inlet hole 8 opens for the attachment of an ink-receiving container (not shown). At the front end of the through bore 5, a nozzle arrangement 9 is mounted, which contains a paint nozzle 10 which can be fixed by means of a thread on the upper part 3 of the gun body 1. The paint nozzle 10 has at its front end a nozzle bore 11 which, together with a tapering front end part of the nozzle needle 6, which can be moved axially via an actuating lever 12, forms an adjustable inlet for the paint, the lacquer or the like. The actuating lever 12 is connected to the nozzle needle 6 in such a way that when the actuating lever 12 is pulled back, it is displaced backwards against the force of a spring 13 and the nozzle bore 11 opens to deliver the paint. The prestress of the compression spring 13 can be adjusted via an adjusting screw 14 arranged at the rear end of the through bore 5 with a corresponding lock nut 15. A valve arrangement 17 for controlling the air supply to the nozzle arrangement 9 can also be actuated by the actuating lever 12 via a rod 16. The valve arrangement 17 contains a closing cone 18 connected to the rod 16 and a valve seat 20 provided in a bore 19 in the gun body 1, against which the closing cone 18 is pressed by a spring 21. When the actuating lever 12 is withdrawn, the closing cone 18 is lifted against the force of the spring 21 via the rod 16 from the valve seat 20, a connection between a lower part 22 located upstream of the valve arrangement 17 and an upper part 23 of a compressed air supply duct located downstream of the valve arrangement 17 the compressed air supply to the nozzle arrangement 9 is opened. On the underside of the handle 2, a compressed air connection 24 for a compressed air line is arranged, which is connected to the lower part 22 of the drain air supply channel.
Von dem oberen Teil 23 des Drackluftzufuhrkanals wird die Druckluft zu einem Luftleitsystem 25 und von dort zu einem Ringspalt 26 geleitet, der die Düsenbohrung 11 umgibt. Die Druckluft erzeugt im Bereich der Düsenbohrung 11 ein Vakuum, durch das die Farbe aus der Düsenbohrung 11 gesaugt und mit der Druckluft unter Bildung eines Rundstrahls mitgerissen wird. Über sogenannte Homluftbohrungen 27 in vorstehenden Hörnern 28 einer die Farbdüse 10 umgebenden Luftkappe 29 kann außerdem die Druckluft zur Formung des Rundstrahls in einen Flachstrahl austreten. Die Luftkappe 29 ist über eine Überwurfmutter 30 an dem Oberteil 3 des Gehäuses 1 befestigbar.The compressed air is conducted from the upper part 23 of the dry air supply duct to an air guide system 25 and from there to an annular gap 26 which surrounds the nozzle bore 11. The compressed air creates a vacuum in the area of the nozzle bore 11, through which the paint is sucked out of the nozzle bore 11 and entrained with the compressed air to form a round jet. The compressed air for shaping the round jet can also emerge into a flat jet via so-called hom air bores 27 in projecting horns 28 of an air cap 29 surrounding the paint nozzle 10. The air cap 29 can be fastened to the upper part 3 of the housing 1 via a union nut 30.
In der Bohrung 19 im Pistolenkörper 1 ist außerdem eine Einrichtung zur Regulierung der Drackluftzufuhr angeordnet. Diese Einrichtung enthält eine drehbare Hülse 31, die eine Querbohrung 32 im Bereich der Einmündung des unteren Teils 22 des Druckluftzufuhrkanals in die Bohrung 19 aufweist. Die Hülse 31 ist drehfest mit einem hinteren Aufhahmeteil 33 verbunden, das am hinteren Ende der Bohrung 19 verdrehbar angeordnet ist. Durch Drehung des Aufhahmeteils 33 kann somit auch die Hülse 31 gedreht und damit der Luftdurchlaß im Bereich der Querbohrung 32 reguliert werden.In the bore 19 in the gun body 1, a device for regulating the intake air is also arranged. This device contains a rotatable sleeve 31, which has a transverse bore 32 in the region of the junction of the lower part 22 of the compressed air supply duct in the bore 19. The sleeve 31 is rotatably connected to a rear receiving part 33 which is rotatably arranged at the rear end of the bore 19. By rotating the receiving part 33, the sleeve 31 can thus also be rotated and the air passage in the region of the transverse bore 32 can thus be regulated.
Innerhalb des Aufhahmeteils 33 ist eine Ausnehmung mit einem Druckerfassungsraum 34 für einen z.B. piezoelektrischen Drackaufhehmer 35 einer Druckmeßeinrichtung zur Erfassung und Anzeige des verfügbaren Drucks vorgesehen. Der Druck-erfassungsraum 34 steht über eine in Axialrichtung des Aufhahmeteils 33 verlaufende Kapillare 36 mit dem Druckluftzufuhrkanal in Verbindung. Über die Kapillare 36 kann der Druck im stromaufwärts der Ventilanordnung liegenden Teil 22 des Drackluftzufuhrkanals ohne Beeinträchtigung durch Rückschlagventile oder dgl. erfaßt werden. Durch die Kapillare 36 kann außerdem verhindert werden, daß ein bei der Reinigung der Spritzpistole verwendetes Reinigungs- bzw. Lösungsmittel und evtl. gelöste Färb- oder Lackpartikel über den Drackluftzufuhrkanal in den Druckerfassungsraum 34 gelangen und dort zu einer Beeinträchtigung der Meßgenauigkeit führen oder sogar eine Messung verhindern. Diese Kapillare 36 weist zweckmäßigerweise einen Durchmesser zwischen 0,5 und 1,8 mm auf.Provided within the receiving part 33 is a recess with a pressure detection space 34 for a, for example, piezoelectric drain detector 35 of a pressure measuring device for detecting and displaying the available pressure. The pressure detection chamber 34 is connected to the compressed air supply channel via a capillary 36 running in the axial direction of the receiving part 33. Via the capillary 36, the pressure in the part 22 of the compressed air supply duct located upstream of the valve arrangement can be affected without impairment can be detected by check valves or the like. The capillary 36 can also prevent a cleaning agent or solvent used in the cleaning of the spray gun and possibly dissolved paint or varnish particles from reaching the pressure detection chamber 34 via the dry air supply channel and there impairing the measuring accuracy or even leading to a measurement prevent. This capillary 36 expediently has a diameter between 0.5 and 1.8 mm.
An dem Aufhahmeteil 35 ist außerdem ein Gehäuse 37 befestigt, in dem eine Schaltungsanordnung 38 zur Umwandlung und/oder Auswertung der Signale des Drackaufhehmers 35, eine - nicht gezeigte - Batterie zur Stromversorgung und eine in Fig. 2 dargestellte digitale Anzeigeeinrichtung 39 untergebracht ist. Die Verbindung zwischen dem Aufhahmeteil 35 und dem Gehäuse 37 ist vollständig abgedichtet, so daß darüber kein Reinigungsmittel oder dgl. zu den empfindlichen Bauteilen der Druckmeßeinrichtung gelangt. Das Gehäuse 37 ist zweckmäßigerweise als Drehknopf ausgebildet. Dadurch können auf sehr kompakte und platzsparende Weise die Einrichtung zur Regulierung der Drackluftzufuhr und die Druckmeßeinrichtung kombiniert werden.A housing 37 is also fastened to the receiving part 35, in which a circuit arrangement 38 for converting and / or evaluating the signals of the drain detector 35, a battery (not shown) for the power supply and a digital display device 39 shown in FIG. 2 is accommodated. The connection between the receiving part 35 and the housing 37 is completely sealed, so that no cleaning agent or the like reaches the sensitive components of the pressure measuring device. The housing 37 is expediently designed as a rotary knob. As a result, the device for regulating the compressed air supply and the pressure measuring device can be combined in a very compact and space-saving manner.
Die Erfindung ist nicht auf das vorstehend beschriebene und in der Zeichnung dargestellte Ausführungsbeispiel beschränkt. So können z.B. anstelle piezoelektrischer Druckaufhehmer auch andere geeignete Druckaufhehmer bzw. Drucksensoren verwendet werden. Darüber hinaus können die Druckaufhehmer auch an anderen geeigneten Stellen angebracht sein. The invention is not limited to the embodiment described above and shown in the drawing. For example, instead of piezoelectric pressure transducers, other suitable pressure transducers or pressure sensors can also be used. In addition, the pressure transducers can also be attached at other suitable locations.

Claims

Ansprüche Expectations
1. Spritzpistole mit1. Spray gun with
- einem Pistolenkörper (1),- a gun body (1),
- einer am Pistolenkörper (1) angeordneten Düsenanordnung (9),- A nozzle arrangement (9) arranged on the gun body (1),
- einem im Pistolenkörper (1) angeordneten Drackluftzufuhrkanal (22, 23) mit einer Ventilanordnung (17) zur Steuerung der Drackluftzufuhr zur Düsenanordnung- One in the gun body (1) arranged drain air supply channel (22, 23) with a valve arrangement (17) for controlling the drain air supply to the nozzle arrangement
(9),(9)
- einer Stelleinrichtung (6, 13) zur Einstellung der Spritzmaterialzufuhr,- an adjusting device (6, 13) for adjusting the spray material supply,
- einem Betätigungselement (12) zur Betätigung der Ventilanordnung (17) und der Stelleinrichtung (6, 13),- an actuating element (12) for actuating the valve arrangement (17) and the actuating device (6, 13),
- einer Einrichtung (31, 33, 37) zur Regulierung der Druckluftzufuhr zur Düsenanordnung (9), und- A device (31, 33, 37) for regulating the compressed air supply to the nozzle arrangement (9), and
- einer Drackmeßeinrichtung (35, 38, 39) zur Erfassung und Anzeige des Drucks im Drackluftzufuhrkanal (22)- A pressure measuring device (35, 38, 39) for detecting and displaying the pressure in the dry air supply duct (22)
dadurch gekennzeichnet,characterized,
daß die Drackmeßeinrichtung (35, 38, 39) in die Einrichtung (31, 33, 37) zur Regulierung der Drackluftzufuhr integriert ist.that the pressure measuring device (35, 38, 39) is integrated in the device (31, 33, 37) for regulating the supply of dry air.
2. Spritzpistole nach Ansprach 1, dadurch gekennzeichnet, daß die Einrichtung (31, 33, 37) zur Regulierung der Drackluftzufuhr eine durch ein Stellglied (33, 37) verstellbare Hülse (31) mit einer Querbohrung (32) zur Einstellung eines Durchgangsquerschnitts des Drackluftzufuhrkanals (22, 23) enthält.2. Spray gun according spoke 1, characterized in that the device (31, 33, 37) for regulating the Drackluftzufuhr an adjustable by an actuator (33, 37) sleeve (31) with a transverse bore (32) for adjusting a passage cross section of the Drackluftzuführkanals (22, 23) contains.
3. Spritzpistole nach Ansprach 2, dadurch gekennzeichnet, daß die Drackmeßeinrichtung (35, 38, 39) einen im Stellglied (33, 37) angeordneten Druckaufhehmer (35) enthält. 3. Spray gun according spoke 2, characterized in that the pressure measuring device (35, 38, 39) in the actuator (33, 37) arranged pressure transducer (35).
4. Spritzpistole nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Drackmeßeinrichtung (35, 38, 39) eine im Stellglied (33, 37) eingebaute Anzeigeeinrichtung (39) enthält.4. Spray gun according to claim 2 or 3, characterized in that the pressure measuring device (35, 38, 39) in the actuator (33, 37) built-in display device (39).
5. Spritzpistole nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Stellglied (33, 37) ein mit der Hülse (31) verdrehfest verbundenes Aufhahmeteil (33) und ein mit diesem verbundenes Gehäuse (37) aufweist.5. Spray gun according to claim 3 or 4, characterized in that the actuator (33, 37) with the sleeve (31) non-rotatably connected receiving part (33) and a housing (37) connected thereto.
6. Spritzpistole nach Ansprach 5, dadurch gekennzeichnet, daß der Druckaufhehmer (35) in dem Aufhahmeteil (33) und die Anzeigeeinrichtung (39) im Gehäuse (37) untergebracht ist.6. Spray gun according spoke 5, characterized in that the pressure receiver (35) in the receiving part (33) and the display device (39) is housed in the housing (37).
7. Spritzpistole nach Ansprach 6, dadurch gekennzeichnet, daß die Anzeigeeinrichtung (39) an einer hinteren Stirnseite des Gehäuses (37) angeordnet ist.7. Spray gun according spoke 6, characterized in that the display device (39) is arranged on a rear end face of the housing (37).
8. Spritzpistole nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, daß der Druckaufhehmer (35) über eine Kapillare (36) mit dem Drackluftzufuhrkanal (22, 23) in Verbindung steht.8. Spray gun according to one of claims 3 to 7, characterized in that the pressure receiver (35) via a capillary (36) is connected to the drain air supply channel (22, 23).
9. Spritzpistole nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß das Stellglied (33, 37) als Verstellknopf ausgeführt ist.9. Spray gun according to one of claims 2 to 8, characterized in that the actuator (33, 37) is designed as an adjustment button.
10. Spritzpistole nach einem der Ansprüche 4 bis 9, dadurch gekennzeichnet, daß die Anzeigeeinrichtung (39) als Digitalanzeige ausgebildet ist. 10. Spray gun according to one of claims 4 to 9, characterized in that the display device (39) is designed as a digital display.
EP01967097A 2000-06-30 2001-06-27 Spray pistol Expired - Lifetime EP1294490B1 (en)

Applications Claiming Priority (3)

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DE10031858 2000-06-30
DE10031858A DE10031858B4 (en) 2000-06-30 2000-06-30 spray gun
PCT/EP2001/007323 WO2002000355A1 (en) 2000-06-30 2001-06-27 Spray pistol

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EP1294490A1 true EP1294490A1 (en) 2003-03-26
EP1294490B1 EP1294490B1 (en) 2007-06-13

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EP (1) EP1294490B1 (en)
JP (1) JP4776141B2 (en)
CN (1) CN1167514C (en)
DE (1) DE10031858B4 (en)
WO (1) WO2002000355A1 (en)

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US11826771B2 (en) 2018-08-01 2023-11-28 Sata Gmbh & Co. Kg Set of nozzles for a spray gun, spray gun system, method for embodying a nozzle module, method for selecting a nozzle module from a set of nozzles for a paint job, selection system and computer program product
US11865558B2 (en) 2018-08-01 2024-01-09 Sata Gmbh & Co. Kg Nozzle for a spray gun, nozzle set for a spray gun, spray guns and methods for producing a nozzle for a spray gun
US12097519B2 (en) 2020-09-11 2024-09-24 Sata Gmbh & Co. Kg Sealing element for sealing a transition between a spray gun body and an attachment of a spray gun, attachment, in particular a paint nozzle arrangement for a spray gun and a spray gun, in particular a paint spray gun

Also Published As

Publication number Publication date
EP1294490B1 (en) 2007-06-13
US6845924B2 (en) 2005-01-25
CN1167514C (en) 2004-09-22
WO2002000355A1 (en) 2002-01-03
JP2004501746A (en) 2004-01-22
DE10031858B4 (en) 2008-07-03
US20030164408A1 (en) 2003-09-04
DE10031858A1 (en) 2002-01-17
JP4776141B2 (en) 2011-09-21
CN1429135A (en) 2003-07-09

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