[go: up one dir, main page]

EP0032391A1 - Apparatus for atomizing liquid paint - Google Patents

Apparatus for atomizing liquid paint Download PDF

Info

Publication number
EP0032391A1
EP0032391A1 EP81100134A EP81100134A EP0032391A1 EP 0032391 A1 EP0032391 A1 EP 0032391A1 EP 81100134 A EP81100134 A EP 81100134A EP 81100134 A EP81100134 A EP 81100134A EP 0032391 A1 EP0032391 A1 EP 0032391A1
Authority
EP
European Patent Office
Prior art keywords
bell
paint
deflecting
overflow surface
labyrinth
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
EP81100134A
Other languages
German (de)
French (fr)
Other versions
EP0032391B1 (en
Inventor
Kurt Vetter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0032391A1 publication Critical patent/EP0032391A1/en
Application granted granted Critical
Publication of EP0032391B1 publication Critical patent/EP0032391B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member
    • B05B3/1014—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1092—Means for supplying shaping gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell

Definitions

  • the invention relates to a device for atomizing liquid paint, in particular a paint sprayer, with an atomizer bell rotatable about a central axis, which has an annular, coaxial overflow surface on its axially front end face and a central axial breakthrough at its base and is provided with a rotationally symmetrical deflection part above the base is, which faces the opening with the back of its center and is adjacent with its radially outer edge of the overflow surface, the space between the deflecting part and the bottom being connected in a liquid-conducting manner to the exposed bell space above the overflow surface; and with a nozzle located at the free end of a coaxial paint feed tube, which protrudes into the intermediate space and opens out towards the center of the deflecting part.
  • the atomizer bell is provided with an essentially circular disk-shaped deflection part which has a concave, slightly conical end face on its front side and a conical hub on its rear side, which lies opposite the nozzle opening at a distance.
  • the edge of the deflecting part projects freely beyond an annular fastening part connected to it in front of the radially inner edge of the overflow surface, from which it maintains a certain distance, but which is less than the axial extent of the concave overflow surface, so that the entire deflecting part lies within the bell.
  • the elastic fastening part clamped in by the radially inner circumference of the bell has a plurality of radial channels distributed uniformly over its circumference, which are adjacent to the rear side of the edge of the deflecting part and open out tangentially to the inner edge of the overflow surface.
  • the paint therefore flows axially out of the nozzle into the space enclosed by the fastening part between the deflecting part and the base of the bell, where the color flow is deflected radially by the hub of the deflecting part, whereupon the centrifugal action of the deflecting part rotating with the bell starts on the deflected ink flow and ensures that the color on the back of the deflection part flows to the edge where it reaches the overflow surface of the bell through the channels.
  • a disadvantage of the deflecting part of the known device is that (even with electrostatic operation of the device - then discharged) particles of the paint atomized into mist reach the front of the deflecting part by suction, where they are not thrown off if the paint is like paint contains volatile solvent which evaporates or evaporates after the paint has been atomized and causes the paint to adhere to the front of the deflecting part. Even with watery colors, fog droplets settle on the front of the deflecting part, which are not thrown off due to the drying due to water evaporation.
  • agglomerates are formed on the front of the deflection part of the known device from metal particles, which adhere due to the particularly high volatility of the solvent and the effectiveness of the binder. These agglomerates are detached here and there and centrifugally thrown against the transfer area, where they get into the paint stream and finally onto the object to be sprayed with paint, where they form annoying defects in the paint.
  • the invention is based on the object of avoiding the disadvantages described and of creating a device of the type mentioned at the outset which reduces the effort required for changing the color and prevents the formation of harmful agglomerates from metal particles.
  • the deflecting part has in its center a cannula labyrinth with a radial component, which has a coaxial inlet opposite the nozzle opening and a coaxial outlet to the front of the deflecting part; and that the front of the deflecting part forms an annular, coaxial overflow surface for overflow by a partial flow of the paint, which opens at the edge of this surface into the main flow of paint flowing on the front overflow surface of the bell.
  • the radially outer edge of the overflow surface of the deflection part and the radially inner edge of the overflow surface of the bell lie flush. The partial flow of the paint can therefore flow smoothly into the main flow.
  • the preferred embodiment is a device whose atomizer bell, as in the known device, is provided with a fastening part integrally formed on the radially outer edge of the deflecting part for fastening the deflecting part to the radially inner circumference of the bell, with essentially radial at the transition from the deflecting part to the fastening part , tubules extending from the space are formed.
  • an annular cavity is formed at the transition from the deflecting part to the fastening part, into which the channels open and which via an annular gap between the bell and the deflecting part at the meeting point of the adjacent edges of the overflow surfaces of the bell and the deflecting part opens into the exposed bell room. This ensures a more uniform loading of the overflow surface of the bell over the circumference of the bell, so that a correspondingly improved application of paint is produced.
  • an annular groove, closed by the bell, is provided in the fastening part as a cavity, which is easy to manufacture and easily accessible for cleaning.
  • the preferred embodiment is a device, the deflection part of which, as in the known device, is essentially a circular disk with a central hub, which projects against the nozzle.
  • the hub contains the cannula labyrinth, which is accommodated there at a suitable location and has enough space.
  • the deflecting part has a stepped, essentially cylindrical recess with an inner shoulder on its front, on which rests an insert ring, the central, rounded front hole of which forms the outlet of the cannula labyrinth and which is flush with the overflow surface of the deflecting part at the front.
  • the shape of the insert ring can be worked out very precisely and then inserted into the deflection part.
  • the inlet of the cannula labyrinth in the hub is designed as a coaxial bore, which is connected to the annular space at the base of the depression behind the insert ring via a plurality of uniformly distributed puncture cannulas.
  • the cannula labyrinth including inlet and outlet is dimensioned such that the partial flow of the paint can be adjusted to less than half of the total flow through the nozzle.
  • the embodiment of the device according to the invention which can be fastened to a frame by means of a rod 10, mainly consists of a rotating atomizer bell 12, a hollow shaft 14 which supports the bell with its front end in a rotationally fixed manner, and a pneumatically operated motor 16 for driving the shaft Blower device 18, from a paint feed device 20 and from a pneumatic cylinder-piston unit 22 for actuating a valve 24 of the paint feed device.
  • the one-piece atomizer bell 12 for example made as a turned part made of aluminum, in turn consists of a circular disk-shaped base 26 forming its base 28 with an internally threaded bore 30 as the central opening, and a ring 32 with a circular cylindrical opening formed onto the edge of the base 26 to the front 34, which ends at the base 28 lying in a radial plane and has a forwardly diverging, cone-shaped bevel 36 on its axially front edge, from an integrally formed on the ring 32, axially forwardly projecting, annular lip 38, the edge of which many small , has evenly distributed on the circumference, internal grooves 40, and as a starting at the bevel 36, ending at the grooves 40, that is, end-face, annular overflow surface 42, the profile of which is approximately half of a straight line beginning at the bevel 36 and out an arc ending at the grooves 40 is composed.
  • the straight profile section results in an extremely weak axially converging inner ring surface and the circular arc-shaped profile section results
  • the atomizer bell 12 is screwed with its threaded bore 30 onto the front end of the hollow shaft 14, which is provided with an external thread, and is tightened for a rotationally fixed connection with its base 26 against a stop ring 44, which is axially stuck on a thread-free section of the hollow shaft 14.
  • a coaxial paint feed pipe 46 of the paint feed device 20 runs without contact within the hollow shaft 14, which also includes a nozzle 48, which is partially screwed into the paint feed pipe 46 ending at the bottom 28 of the bell 12 and sealed and a conical valve seat 50 of the valve 24 inside the pipe end of the device 20 forms, the valve body of which is the frustoconical tip 52 of a valve actuating needle 54 which lies with all-round radial play in the paint feed tube 46 and forms an annular paint feed channel 56 with it.
  • the atomizer bell 12 is provided with a deflecting part 58, which deflects the ink flow emerging axially from the nozzle 48 in all radial directions and divides it into a main flow flowing on its rear side and a partial flow flowing on its front side, which should be approximately a quarter of the total flow.
  • This deflecting part 58 essentially has a flat circular disk 60 with a central hub 62.
  • the circular disk 60 has on its outer edge an axially diverging, conical outer circumferential surface 64, the opening angle of which corresponds exactly to the opening angle of the bevel 36, so that it forms a constantly wide annular gap 66 with the circumferential surface 64.
  • the front side of the circular disk 60 represents an overflow surface 68 of the deflecting part 58 which is extremely weakly converging axially towards the rear and which merges smoothly and smoothly into the overflow surface 42 of the bell 12 at the annular gap 66 in its mouth plane.
  • the rear side of the deflecting part 58 which receives the main flow of paint, is of conical hub 62 outside the circular disk 60, in which it is essentially cylindrical, and mainly in a radia from an outside of the hub len plane surface 70 of the circular disk 60 is formed.
  • the axially rearward-pointing tip of the hub 62 lies at a distance from the mouth of the nozzle 48, into the free cross-section of which it projects.
  • An axial bore 72 of the hub 62 starting at its tip is the inlet of a cannula labyrinth 74 of the deflection part 58, which has on its front side a coaxial recess 76 with an inner shoulder 78, on which an insert ring 80 adapted to the recess 76 has a bore rounded off at its front edge 82 is located, which forms the axial outlet of the cannula labyrinth 74.
  • the insert ring 80 forms with the bottom of the recess 76 an annular space 84 of the cannula labyrinth 74, to which straight needle cannulas 86 still diverging axially towards the front belong, which on the one hand into the hub bore 72 and on the other hand open into the annular space 84.
  • a fastening part 88 is integrally formed on the edge of the deflection part 58, which has an elastic retaining ring 90 with a trapezoidal cross-section encompassed radially or axially on one side by the opening 34 and the base 28 of the atomizer bell 12, which has the intermediate space 92 between the circular disk 60 of the deflection part 58 and the base 28 of the bell 12 surrounds.
  • annular groove 96 in the fastening part 88 forms a cavity which is closed by the ring 32 of the bell 12 and which communicates with the intermediate space 92 via many radial channels evenly distributed over the circumference of the circular disk 60 98 is connected, which are arranged at the transition from the fastening part 88 to the deflection part 58 on the rear surface 70 thereof.
  • the pneumatic motor 16 for driving the hollow shaft 14 has a turbine impeller 100 with rotor blades 102 which are acted upon by compressed air which emerges from radial nozzles 104.
  • the blowing device 18 has a line 106 for supplying compressed air, which ends in an annular chamber 108, which is provided on its end face with several, evenly on the circumference of the Stop ring 44 distributed, axially parallel nozzles 110 is provided, which open towards the ring 32 of the atomizer bell 12 to the outside.
  • the ink supply device 20 is shown in a highly simplified manner by being restricted to one color.
  • the device could be a multi-color atomizer.
  • a suction device is required which, when changing the color, vacuums the ink supply channel 56 which ends at the valve 24 before the next color is sprayed.
  • the unit 22 is double-acting. Its piston rod is firmly connected to the valve actuation needle 54.

Landscapes

  • Nozzles (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

Zur Beseitigung der bestehenden Probleme, beim Farbwechsel die neue Farbe von der alten unverunreinigt zu vernebeln und beim Zerstäuben von Metalliclacken die Bildung von Fehlstellen im niedergeschlagenen Lack zu vermeiden, wird ausgehend von einer Einrichtung mit einer Zerstäuberglocke (12), in deren zentralem Durchbruch (34) ein den aus einer Düse (48) axial austretenden Farbstrom umlenkendes Teil (58) angeordnet ist, vorgeschlagen, daß das Umlenkteil (58) im Zentrum ein Kanülenlabyrinth (74) aufweist, das einen Teil des Farbstromes auf die Vorderseite des Umlenkteils (58) leitet, wo er dieses überströmt und am Rand auf die Innenseite der Glocke (12) überwechselt, damit auf der Vorderseite des Umlenkteils (58) abgesetzte Nebeltröpfchen oder Metallpartikel von dem dort fließenden Teilstrom der Farbe auf- und mitgenommen werden, so daß sie nicht haften bleiben bzw. agglomerieren können.In order to eliminate the existing problems of atomizing the new paint from the old one without contamination when changing the paint and avoiding the formation of defects in the deposited paint when atomizing metallic paints, a device with an atomizer bell (12), in the central opening (34 ) a part (58) deflecting the ink flow emerging axially from a nozzle (48) is proposed that the deflection part (58) has a cannula labyrinth (74) in the center, which part of the color flow onto the front of the deflection part (58) conducts where it overflows and at the edge changes to the inside of the bell (12), so that on the front of the deflecting part (58) deposited mist droplets or metal particles are taken up and carried away by the partial flow of paint flowing there, so that they do not adhere can stay or agglomerate.

Description

Die Erfindung betrifft eine Einrichtung zum Vernebeln flüssiger Farbe, insbesondere einen Lackzerstäuber, mit einer um eine Zentralachse rotierbaren Zerstäuberglocke, die auf ihrer axial vorderen Stirnseite eine ringförmige, koaxiale Überströmungsfläche und an ihrem Grund einen zentralaxialen Durchbruch aufweist sowie über dem Grund mit einem rotationssymmetrischen Umlenkteil versehen ist, das mit der Rückseite seines Zentrums dem Durchbruch gegenübersteht und mit seinem radial äußeren Rand der Uberströmungsfläche benachbart ist, wobei der Zwischenraum zwischen dem Umlenkteil und dem Grund mit dem freiliegenden Glockenraum oberhalb der Uberströmungsfläche flüssigkeitsleitend verbunden ist; und mit einer am freien Ende eines koaxialen Farbzuführrohres sitzenden Düse, die in den Zwischenraum ragt und gegenüber dem Zentrum des Umlehkteils ausmündet.The invention relates to a device for atomizing liquid paint, in particular a paint sprayer, with an atomizer bell rotatable about a central axis, which has an annular, coaxial overflow surface on its axially front end face and a central axial breakthrough at its base and is provided with a rotationally symmetrical deflection part above the base is, which faces the opening with the back of its center and is adjacent with its radially outer edge of the overflow surface, the space between the deflecting part and the bottom being connected in a liquid-conducting manner to the exposed bell space above the overflow surface; and with a nozzle located at the free end of a coaxial paint feed tube, which protrudes into the intermediate space and opens out towards the center of the deflecting part.

Bei einer vorbekannten Einrichtung dieser Art ist deren Zerstäuberglocke mit einem im wesentlichen kreisscheibenförmigen Umlenkteil versehen, das auf seiner Vorderseite eine konkave, schwach konische Stirnfläche und auf seiner Rückseite eine kegelige Nabe aufweist, die der Düsenöffnung mit Abstand gegenüberliegt. Der Rand des Umlenkteiles ragt frei über ein mit ihm verbundenes ringförmiges Befestigungsteil hinaus vor den radial inneren Rand der überströmungsfläche, von der er einen gewissen Abstand hält, der aber geringer ist als die axiale Ausdehnung der konkaven Überströmungsfläche, so daß das ganze Umlenkteil innerhalb der Glocke liegt. Das vom radial inneren Umfang der Glocke eingespannte elastische Befestigungsteil weist mehrere, gleichmäßig auf seinen Umfang verteilte radiale Kanälchen auf, die der Rückseite des Randes des Umlenkteiles benachbart sind und tangential auf den inneren Rand der Überströmungsfläche ausmünden. Die Farbe strömt daher axial aus der Düse in den vom Befestigungsteil umschlossenen Zwischenraum zwischen Umlenkteil und Glockengrund, wo der Farbstrom von der Nabe des Umlenkteiles radial umgelenkt wird, worauf die Zentrifugalwirkung des mit der Glocke rotierenden Umlenkteiles auf den umgelenkten Farbstrom einsetzt und dafür sorgt, daß die Farbe auf der Rückseite des Umlenkteiles zu deren Rand fließt, wo sie durch die Kanälchen auf die Überströmungsfläche der Glocke gelangt.In a previously known device of this type, the atomizer bell is provided with an essentially circular disk-shaped deflection part which has a concave, slightly conical end face on its front side and a conical hub on its rear side, which lies opposite the nozzle opening at a distance. The edge of the deflecting part projects freely beyond an annular fastening part connected to it in front of the radially inner edge of the overflow surface, from which it maintains a certain distance, but which is less than the axial extent of the concave overflow surface, so that the entire deflecting part lies within the bell. The elastic fastening part clamped in by the radially inner circumference of the bell has a plurality of radial channels distributed uniformly over its circumference, which are adjacent to the rear side of the edge of the deflecting part and open out tangentially to the inner edge of the overflow surface. The paint therefore flows axially out of the nozzle into the space enclosed by the fastening part between the deflecting part and the base of the bell, where the color flow is deflected radially by the hub of the deflecting part, whereupon the centrifugal action of the deflecting part rotating with the bell starts on the deflected ink flow and ensures that the color on the back of the deflection part flows to the edge where it reaches the overflow surface of the bell through the channels.

An dem Umlenkteil der bekannten Einrichtung ist nachteilig, daß(auch bei einem elektrostatischen Betrieb der Einrichtung - dann entladene) Partikel der zu Nebel zerstäubten Farbe durch Sog auf die Vorderseite des Umlenkteiles gelangen, wo sie nicht abgeschleudert werden, falls die Farbe wie bei Lacken ein leicht flüchtiges Lösungsmittel enthält, das nach dem Vernebeln der Farbe verdunstet oder verdampft und die Farbe auf der Vorderseite des Umlenkteiles haften läßt. Auch bei wässrigen Farben setzen sich Nebeltröpfchen auf der Vorderseite des Umlenkteiles ab, welche wegen des Antrocknens infolge Wasserverdunstung nicht abgeschleudertwerden. Diese auf der Vorderseite des Umlenkteiles sitzen gebliebenden Farbpartikel müssen vor einem Farbwechsel entfernt werden, wozu bei der bekannten Einrichtung ein Kapillarrohr einer Spüleinrichtung dient, aus dem ein organisches bzw. wässriges Lösungsmittel auf die Vorderseite des Umlenkteiles gespritzt wird, bevor die Einrichtung mit der neuen Farbe beschickt wird. Das erfordert außer dem empfindlichen Kapillarrohr einen besonderen Zeitaufwand beim Farbwechsel.A disadvantage of the deflecting part of the known device is that (even with electrostatic operation of the device - then discharged) particles of the paint atomized into mist reach the front of the deflecting part by suction, where they are not thrown off if the paint is like paint contains volatile solvent which evaporates or evaporates after the paint has been atomized and causes the paint to adhere to the front of the deflecting part. Even with watery colors, fog droplets settle on the front of the deflecting part, which are not thrown off due to the drying due to water evaporation. These color particles remaining on the front of the deflecting part must be removed before a color change, for which purpose a capillary tube of a flushing device is used in the known device, from which an organic or aqueous solvent is sprayed onto the front of the deflecting part before the device with the new color is loaded. In addition to the sensitive capillary tube, this requires a special amount of time when changing colors.

Beim Zerstäuben von Metalliclacken, die außer Farbpigmenten und Lösungsmittel Metallpartikel und Bindemittel enthalten, bilden sich auf der Vorderseite des Umlenkteiles der bekannten Einrichtung aus Metallpartikeln Agglomerate, die infolge der besonders hohen Flüchtigkeit des Lösungsmittels und der Wirksamkeit des Bindemittels anhaften. Diese Agglomerate werden hin und wieder da und dort abgelöst und gegegen die Überströgsfläche zentrifugal abgeschleudert, wo sie in den Farbstrom und schließlich auf den mit Farbe zu besprühenden Gegenstand gelangen, wo sie störende Fehlerstellen im Lack bilden.When atomizing metallic paints which contain metal particles and binders in addition to color pigments and solvents, agglomerates are formed on the front of the deflection part of the known device from metal particles, which adhere due to the particularly high volatility of the solvent and the effectiveness of the binder. These agglomerates are detached here and there and centrifugally thrown against the transfer area, where they get into the paint stream and finally onto the object to be sprayed with paint, where they form annoying defects in the paint.

Der Erfindung liegt nun die Aufgabe zugrunde, die geschilderten Nachteile zu vermeiden und eine Einrichtung der eingangs genannten Art zu schaffen, die den zum Farbwechsel erforderlichen Aufwand vermindert und die Bildung von schädlichen Agglomeraten aus Metallpartikeln verhindert.The invention is based on the object of avoiding the disadvantages described and of creating a device of the type mentioned at the outset which reduces the effort required for changing the color and prevents the formation of harmful agglomerates from metal particles.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß das Umlenkteil in seinem Zentrum ein Kanülenlabyrinth mit radialer Komponente aufweist, welches einen der Düsenöffnung gegenüberliegenden, koaxialen Einlaß und einen koaxialen Auslaß auf die Vorderseite des Umlenkteiles aufweist; und daß die Vorderseite des Umlenkteiles eine ringförmige, koaxiale Uberströmungsfläche zum Überströmen durch einen Teilstrom der Farbe bildet, der am Rand dieser Fläche in den auf der stirnseitigen Uberströmungsfläche der Glocke fließenden Hauptstrom der Farbe einmündet. Dadurch wird vorteilhafterweise erreicht, daß auf die Vorderseite des Umlenkteiles abgesetzte Nebeltröpfchen von dem dort fließenden Teilstrom der Farbe aufgenommen und dadurch aufgelöst werden, so daß sie nicht zurückbleiben, und daß auf der Uberströmungsfläche des Umlenkteiles abgesetzten Metallpartikeln gleiches widerfährt, so daß sie nicht agglomerieren können. Beim Farbwechsel nachgeschicktes Lösungsmittel beseitigt den nach Spritzende haften gebliebenen Farbnaßfilm durch Wegspülen.This object is achieved in that the deflecting part has in its center a cannula labyrinth with a radial component, which has a coaxial inlet opposite the nozzle opening and a coaxial outlet to the front of the deflecting part; and that the front of the deflecting part forms an annular, coaxial overflow surface for overflow by a partial flow of the paint, which opens at the edge of this surface into the main flow of paint flowing on the front overflow surface of the bell. This advantageously ensures that mist droplets deposited on the front of the deflecting part are absorbed by the partial flow of paint flowing there and thereby dissolved so that they do not remain, and that metal particles deposited on the overflow surface of the deflecting part do the same so that they cannot agglomerate . When the color is changed, the solvent that is left behind removes the wet paint film that remains after spraying by rinsing it away.

Bei einer bevorzugten Ausführungsform der erfindungsgemäßen Einrichtung liegen der radial äußere Rand der Überströmungsfläche des Umlenkteiles und der radial innere Rand der Überströmungsfläche der Glocke bündig. Der Teilstrom der Farbe kann daher glatt in den Hauptstrom einfließen.In a preferred embodiment of the device according to the invention, the radially outer edge of the overflow surface of the deflection part and the radially inner edge of the overflow surface of the bell lie flush. The partial flow of the paint can therefore flow smoothly into the main flow.

Die bevorzugte Ausführungsform ist eine Einrichtung, deren Zerstäuberglocke wie bei der bekannten Einrichtung mit einem einstückig an den radial äußeren Rand des Umlenkteiles angeformten Befestigungsteil zum Befestigen des Umlenkteiles am radial inneren Umfang der Glocke versehen ist, wobei am Übergang vom Umlenk- zum Befestigungsteil im wesentlichen radiale, vom Zwischenraum ausgehende Kanälchen ausgebildet sind. Bei der bevorzugten Ausführungsform ist darüber hinaus vorgesehen, daß am Übergang vom Umlenk- zum Befestigungsteil ein ringförmiger Hohlraum ausgebildet ist, in den die Kanälchen münden und der über einen Ringspalt zwischen Glocke und Umlenkteil an der Begegnungsstelle der benachbarten Ränder der Uberströmungsflächen der Glocke und des Umlenkteiles in den freiliegenden Glockenraum mündet. Dadurch ist eine über den Umfang der Glocke gleichmäßigere Beschickung der stirnseitigen Uberströmungsfläche der Glocke gewährleistet, so daß ein entsprechend verbesserter Farbauftrag entsteht.The preferred embodiment is a device whose atomizer bell, as in the known device, is provided with a fastening part integrally formed on the radially outer edge of the deflecting part for fastening the deflecting part to the radially inner circumference of the bell, with essentially radial at the transition from the deflecting part to the fastening part , tubules extending from the space are formed. In the preferred embodiment it is also provided that an annular cavity is formed at the transition from the deflecting part to the fastening part, into which the channels open and which via an annular gap between the bell and the deflecting part at the meeting point of the adjacent edges of the overflow surfaces of the bell and the deflecting part opens into the exposed bell room. This ensures a more uniform loading of the overflow surface of the bell over the circumference of the bell, so that a correspondingly improved application of paint is produced.

Bei der bevorzugten Ausführungsform ist als Hohlraum eine von der Glocke geschlossene Ringnut im Befestigungsteil vorgesehen, die einfach herstellbar und zwecks Reinigung leicht zugänglich ist.
Die bevorzugte Ausführungsform ist eine Einrichtung, deren Umlenkteil wie bei der bekannten Einrichtung im wesentlichen eine Kreisscheibe mit zentraler Nabe ist, die gegen die Düse vorspringt. Bei der bevorzugten Ausführungsform enthält die Nabe das Kanülenlabyrinth, das dort an geeigneter Stelle untergebracht ist und genügend Platz findet.In the preferred embodiment, an annular groove, closed by the bell, is provided in the fastening part as a cavity, which is easy to manufacture and easily accessible for cleaning.
The preferred embodiment is a device, the deflection part of which, as in the known device, is essentially a circular disk with a central hub, which projects against the nozzle. In the preferred embodiment, the hub contains the cannula labyrinth, which is accommodated there at a suitable location and has enough space.

Bei der bevorzugten Ausführungsform weist das Umlenkteil auf seiner Vorderseite eine abgestufte, im wesentlichen zylindrische Vertiefung mit Innenschulter auf, auf der ein Einsatzring ruht, dessen zentrale, vorn ausgerundete Bohrung den Auslaß des Kanülenlabyrinths bildet und der vorn bündig mit der Überströmungsfläche des Umlenkteiles abschließt. Der Einsatzring kann in seiner Form sehr genau ausgearbeitet und dann in das Umlenkteil eingefügt werden.
Bei der bevorzugten Ausführungsform ist der Einlaß des Kanülenlabyrinths in der Nabe als koaxiale Bohrung ausgebildet, die über mehrere,gleichmäßig verteilte Stichkanülen mit dem Ringraum am Grund der Vertiefung hinter dem Einsatzring verbunden ist. Diese Labyrinthgestaltung ist einfach herstellbar und sichert eine axial langsame Teilströmung auf die Überströmungsfläche des Umlenkteiles.
Bei der bevorzugten Ausführungsform ist das Kanülenlabyrinth einschließlich Ein- und Auslaß so bemessen, daß der Teilstrom der Farbe auf weniger als die Hälfte des Gesamtstromes durch die Düse einstellbar ist.In the preferred embodiment, the deflecting part has a stepped, essentially cylindrical recess with an inner shoulder on its front, on which rests an insert ring, the central, rounded front hole of which forms the outlet of the cannula labyrinth and which is flush with the overflow surface of the deflecting part at the front. The shape of the insert ring can be worked out very precisely and then inserted into the deflection part.
In the preferred embodiment, the inlet of the cannula labyrinth in the hub is designed as a coaxial bore, which is connected to the annular space at the base of the depression behind the insert ring via a plurality of uniformly distributed puncture cannulas. This labyrinth design is easy to manufacture and ensures an axially slow partial flow onto the overflow surface of the deflection part.
In the preferred embodiment, the cannula labyrinth including inlet and outlet is dimensioned such that the partial flow of the paint can be adjusted to less than half of the total flow through the nozzle.

Im folgenden ist die Erfindung anhand der durch die Zeichnung beispielhaft dargestellten, bevorzugten Ausführungsform der erfindungsgemäßen Einrichtung im einzelnen erläutert. Es zeigt:

  • Fig. 1 eine verkleinerte Seitenansicht der Ausführungsform; und
  • Fig. 2 einen abgebrochen dargestellten zentralaxialen Längsschnitt durch die Ausführungsform.
The invention is explained in detail below with reference to the preferred embodiment of the device according to the invention, which is shown by way of example in the drawing. It shows:
  • Fig. 1 is a reduced side view of the embodiment; and
  • Fig. 2 shows a broken central axial longitudinal section through the embodiment.

Die Ausführungsform der erfindungsgemäßen Einrichtung, die mittels einer Stange 10 an einem Gerüst befestigbar ist, besteht hauptsächlich aus einer rotierenden Zerstäuberglocke 12, aus einerdie Glocke mit ihrem vorderen Ende drehfest tragenden Hohlwelle 14, aus einem pneumatisch betriebenen Motor 16 zum Antrieb der Welle, aus einer Blasvorrichtung 18, aus einer Farbzuführvorrichtung 20 und aus einem pneumatischen Zylinder-KolbenAggregat 22 zum Betätigen eines Ventils 24 der Farbzuführvorrichtung.The embodiment of the device according to the invention, which can be fastened to a frame by means of a rod 10, mainly consists of a rotating atomizer bell 12, a hollow shaft 14 which supports the bell with its front end in a rotationally fixed manner, and a pneumatically operated motor 16 for driving the shaft Blower device 18, from a paint feed device 20 and from a pneumatic cylinder-piston unit 22 for actuating a valve 24 of the paint feed device.

Die einstückige,beispielsweise als Drehteil aus Aluminium gefertigte Zerstäuberglocke 12 besteht ihrerseits aus einem ihren Grund 28 bildenden, kreisscheibenförmigen Boden 26 mit einer ein Innengewinde aufweisenden Bohrung 30 als zentralem Durchbruch, aus einem an den Rand des Bodens 26 nach vorn angeformten Ring 32 mit kreiszylindrischem Durchbruch 34, der an dem in einer radialen Ebene liegenden Grund 28 endet und an seinem axial vorderen Rand eine nach vorn divergierende,kegelmantelförmige Schräge 36 aufweist, aus einer an den Ring 32 angeformten, axial nach vorn vorspringenden, ringförmigen Lippe 38, deren Kante viele kleine, gleichmäßig auf den Umfang verteilte, innenliegende Nuten 40 aufweist,und ais einer an der Schräge 36 beginnenden, an den Nuten 40 endenden, also stirnseitigen, ringförmigen Uberströmungsfläche 42, deren Profil ungefähr je zur Hälfte aus einer an der Schräge 36 beginnenden Geraden und aus einem an den Nuten 40 endenden Kreisbogen zusammengesetzt ist. Der gerade Profilabschnitt ergibt eine äußerst schwach axial nach hinten konvergierende innere Ringfläche und der kreisbogenförmige Profilabschnitt ergibt eine tangential angesetzte, axial nach vorn abnehmend divergierende Ringfläche, die sich zur Überströmungsfläche 42 ergänzen.The one-piece atomizer bell 12, for example made as a turned part made of aluminum, in turn consists of a circular disk-shaped base 26 forming its base 28 with an internally threaded bore 30 as the central opening, and a ring 32 with a circular cylindrical opening formed onto the edge of the base 26 to the front 34, which ends at the base 28 lying in a radial plane and has a forwardly diverging, cone-shaped bevel 36 on its axially front edge, from an integrally formed on the ring 32, axially forwardly projecting, annular lip 38, the edge of which many small , has evenly distributed on the circumference, internal grooves 40, and as a starting at the bevel 36, ending at the grooves 40, that is, end-face, annular overflow surface 42, the profile of which is approximately half of a straight line beginning at the bevel 36 and out an arc ending at the grooves 40 is composed. The straight profile section results in an extremely weak axially converging inner ring surface and the circular arc-shaped profile section results in a tangentially set, axial decreasing forward diverging ring surface, which complement the overflow surface 42.

Die Zerstäuberglocke 12 ist mit ihrer Gewinde-Bohrung 30 auf das mit einem Außengewinde versehene vordere Ende der Hohlwelle 14 geschraubt und zur drehfesten Verbindung mit ihrem Boden 26 gegen einen Anschlagring 44 festgezogen, der auf einem gewindefreien Abschnitt der Hohlwelle 14 axial festsitzt. Innerhalb der Hohlwelle 14 verläuft berührungsfrei ein koaxiales Farbzuführrohr 46 der Farbzuführvorrichtung 20, zu der auch eine Düse 48 gehört, die in das am Grund 28 der Glocke 12 endende Farbzuführrohr 46 unter Abdichtung teilweise eingeschraubt ist und innerhalb des Rohrendes einen konischen Ventilsitz 50 des Ventils 24 der Vorrichtung 20 bildet, dessen Ventilkörper die kegelstumpfförmige Spitze 52 einer Ventilbetätigungsnadel 54 ist, die mit allseitigem radialem Spiel in dem Farbzuführrohr 46 liegt und mit diesem einen ringförmigen Farbzuführkanal 56 bildet.The atomizer bell 12 is screwed with its threaded bore 30 onto the front end of the hollow shaft 14, which is provided with an external thread, and is tightened for a rotationally fixed connection with its base 26 against a stop ring 44, which is axially stuck on a thread-free section of the hollow shaft 14. A coaxial paint feed pipe 46 of the paint feed device 20 runs without contact within the hollow shaft 14, which also includes a nozzle 48, which is partially screwed into the paint feed pipe 46 ending at the bottom 28 of the bell 12 and sealed and a conical valve seat 50 of the valve 24 inside the pipe end of the device 20 forms, the valve body of which is the frustoconical tip 52 of a valve actuating needle 54 which lies with all-round radial play in the paint feed tube 46 and forms an annular paint feed channel 56 with it.

Die Zerstäuberglocke 12 ist mit einem Umlenkteil 58 versehen, das den aus der Düse 48 axial austretenden Farbstrom in alle radialen Richtungen umlenkt und in einen auf seiner Rückseite fließenden Hauptstrom sowie einen auf seiner Vorderseite fliessenden Teilstrom aufteilt, der ungefähr ein Viertel des Gesamtstroms betragen soll. Dieses Umlenkteil 58 weist im wesentlichen eine flache Kreisscheibe 60 mit zentraler Nabe 62 auf. Die Kreisscheibe 60 besitzt an ihrem äußeren Rand eine axial nach vorn divergierende, kegelmantelförmige Umfangsfläche 64, deren öffnungswinkel mit dem öffnungswinkel der Schräge 36 genau übereinstimmt, so daß diese mit der Umfangsfläche 64 einen konstant breiten Ringspalt 66 bildet. Die Vorderseite der Kreisscheibe 60 stellt eine axial nach hinten äußerst schwach konvergierende Überströmungsfläche 68 des Umlenkteiles 58 dar, welche am Ringspalt 66 in dessen Mündungsebene stufen- und knicklos in die Uberströmungsfläche 42 der Glocke 12 übergeht.The atomizer bell 12 is provided with a deflecting part 58, which deflects the ink flow emerging axially from the nozzle 48 in all radial directions and divides it into a main flow flowing on its rear side and a partial flow flowing on its front side, which should be approximately a quarter of the total flow. This deflecting part 58 essentially has a flat circular disk 60 with a central hub 62. The circular disk 60 has on its outer edge an axially diverging, conical outer circumferential surface 64, the opening angle of which corresponds exactly to the opening angle of the bevel 36, so that it forms a constantly wide annular gap 66 with the circumferential surface 64. The front side of the circular disk 60 represents an overflow surface 68 of the deflecting part 58 which is extremely weakly converging axially towards the rear and which merges smoothly and smoothly into the overflow surface 42 of the bell 12 at the annular gap 66 in its mouth plane.

Die den Hauptstrom der Farbe aufnehmende Rückseite des Umlenkteiles 58 ist von der außerhalb der Kreisscheibe 60,in der sie im wesentlichen zylindrisch ist, kegelförmigen Nabe 62 und von einer außerhalb der Nabe hauptsächlich in einer radialen Ebene liegenden Fläche 70 der Kreisscheibe 60 gebildet. Die axial nach hinten weisende Spitze der Nabe 62 liegt mit Abstand vor der Mündung der Düse 48, in deren freien Querschnitt sie hineinragt. Eine an ihrer Spitze beginnende axiale-Bohrung 72 der Nabe 62 ist Einlaß eines Kanülenlabyrinths 74 des Umlenkteiles 58, das auf seiner Vorderseite eine koaxiale Vertiefung 76 mit Innenschulter 78 aufweist, auf der ein der Vertiefung 76 angepaßter Einsatzring 80 mit einer an ihrer Vorderkante aufgerundeten Bohrung 82 liegt, die den axialen Auslaß des Kanülenlabyrinths 74 bildet. Der Einsatzring 80, dessen Vorderseite am Rand glatt in die Überströmungsfläche 68 des Umlenkteiles 58 übergeht, bildet mit dem Grund der Vertiefung 76 einen Ringraum 84 des Kanülenlabyrinths 74, zu dem noch axial nach vorn divergierende,gerade Stichkanülen 86 gehören, die einerseits in die Nabenbohrung 72 und andererseits in den Ringraum 84 münden.The rear side of the deflecting part 58, which receives the main flow of paint, is of conical hub 62 outside the circular disk 60, in which it is essentially cylindrical, and mainly in a radia from an outside of the hub len plane surface 70 of the circular disk 60 is formed. The axially rearward-pointing tip of the hub 62 lies at a distance from the mouth of the nozzle 48, into the free cross-section of which it projects. An axial bore 72 of the hub 62 starting at its tip is the inlet of a cannula labyrinth 74 of the deflection part 58, which has on its front side a coaxial recess 76 with an inner shoulder 78, on which an insert ring 80 adapted to the recess 76 has a bore rounded off at its front edge 82 is located, which forms the axial outlet of the cannula labyrinth 74. The insert ring 80, the front of which smoothly merges into the overflow surface 68 of the deflection part 58, forms with the bottom of the recess 76 an annular space 84 of the cannula labyrinth 74, to which straight needle cannulas 86 still diverging axially towards the front belong, which on the one hand into the hub bore 72 and on the other hand open into the annular space 84.

An den Rand des Umlenkteiles 58 ist ein Befestigungsteil 88 einstückig angeformt, das einen vom Durchbruch 34 und vom Grund 28 der Zerstäuberglocke 12 radial bzw. axial einseitig umfaßten, elastischen Haltering 90 mit trapezförmigem Querschnitt aufweist, welcherden Zwischenraum 92 zwischen der Kreisscheibe 60 des Umlenkteiles 58 und dem Grund 28 der Glocke 12 umfängt. Im Anschluß an den in den freiliegenden Glockenraum 94 mündenden Ringspalt 66 ist durch eine Ringnut 96 im Befestigungsteil 88 ein vom Ring 32 der Glocke 12 verschlossener Hohlraum gebildet, der mit dem Zwischenraum 92 über viele, gleichmäßig auf den Umfang der Kreisscheibe 60 verteilte,radiale Kanälchen 98 in Verbindung steht, welche am übergang vom Befestigungsteil 88 zum Umlenkteil 58 an dessen rückwärtiger Fläche 70 angeordnet sind.A fastening part 88 is integrally formed on the edge of the deflection part 58, which has an elastic retaining ring 90 with a trapezoidal cross-section encompassed radially or axially on one side by the opening 34 and the base 28 of the atomizer bell 12, which has the intermediate space 92 between the circular disk 60 of the deflection part 58 and the base 28 of the bell 12 surrounds. Following the annular gap 66 opening into the exposed bell space 94, an annular groove 96 in the fastening part 88 forms a cavity which is closed by the ring 32 of the bell 12 and which communicates with the intermediate space 92 via many radial channels evenly distributed over the circumference of the circular disk 60 98 is connected, which are arranged at the transition from the fastening part 88 to the deflection part 58 on the rear surface 70 thereof.

Der pneumatische Motor 16 zum Antrieb der Hohlwelle 14 weist ein Turbinen-Laufrad 100 mit Laufschaufeln 102 auf, die von Druckluft beaufschlagt werden, die aus radialen Düsen 104 austritt.The pneumatic motor 16 for driving the hollow shaft 14 has a turbine impeller 100 with rotor blades 102 which are acted upon by compressed air which emerges from radial nozzles 104.

Die Blasvorrichtung 18 weist eine Leitung 106 zum Zuführen von Druckluft auf, welche in einer Ringkammer 108 endet, die an ihrer Stirnseite mit mehreren, gleichmäßig auf den Umfang des Anschlagringes 44 verteilten, achsparallelen Düsen 110 versehen ist, die dem Ring 32 der Zerstäuberglocke 12 gegenüber ins Freie münden. Die dort austretende Druckluft verformt als Lenkluft in Verbindung mit einer elektrostatischen Vorrichtung den beim Zerstäuben der Farbe entstehenden Radialstrahl zu einem Rund- oder Ringstrahl mit axialer Hauptkomponente.The blowing device 18 has a line 106 for supplying compressed air, which ends in an annular chamber 108, which is provided on its end face with several, evenly on the circumference of the Stop ring 44 distributed, axially parallel nozzles 110 is provided, which open towards the ring 32 of the atomizer bell 12 to the outside. The compressed air escaping there, as steering air in conjunction with an electrostatic device, deforms the radial jet that arises when the paint is atomized into a circular or ring jet with an axial main component.

Die Farbzuführvorrichtung 20 ist durch Beschränkung auf eine Farbe stark vereinfacht dargestellt. Die Einrichtung könnte ein Mehrfarbenzerstäuber sein. In diesem Fall wird eine Saugvorrichtung benötigt, die beim Farbwechsel den am Ventil 24 endenden Farbzuführkanal 56 leersaugt, bevor die nächste Farbe versprüht wird.
Das Aggregat 22 ist doppeltwirkend. Seine Kolbenstange ist fest mit der Ventilbetätigungsnadel 54 verbunden.The ink supply device 20 is shown in a highly simplified manner by being restricted to one color. The device could be a multi-color atomizer. In this case, a suction device is required which, when changing the color, vacuums the ink supply channel 56 which ends at the valve 24 before the next color is sprayed.
The unit 22 is double-acting. Its piston rod is firmly connected to the valve actuation needle 54.

Die Wirkungsweise der beschriebenen Vorrichtung ergibt sich ohne weiteres aus deren Aufbau und den Funktionen ihrer Einzelteile.The mode of operation of the device described results directly from its structure and the functions of its individual parts.

Claims (8)

1. Einrichtung zum Vernebeln flüssiger Farbe, insbesondere Lackzerstäuber, mit einer um eine Zentralachse rotierbaren Zerstäuberglocke, die auf ihrer axial vorderen Stirnseite eine ringförmige, koaxiale Uberströmungsfläche und an ihrem Grund einen zentralaxialen Durchbruch aufweist sowie über dem Grund mit einem rotationssymmetrischen Umlenkteil versehen ist, das mit der Rückseite seines Zentrums dem Durchbruch gegenübersteht und mit seinem radial äußeren Rand der Überstrtömungsfläche benachbart ist, wobei der Zwischenraum zwischen dem Umlenkteil und dem Grund mit dem freiliegenden Glockenraum oberhalb der Uberströmungsfläche flüssigkeitsleitend verbunden ist; und mit einer am freien Ende eines koaxialen Farbzuführrohres sitzenden Düse, die in den Zwischenraum ragt und gegenüber dem Zentrum des Umlenkteiles ausmündet, dadurch gekennzeichnet, daß das Umlenkteil (58) in seinem Zentrum (62) ein Kanülenlabyrinth (74) mit radialer Komponente aufweist, welches einen der Düsenöffnung gegenüberliegenden, koaxialen Einlaß (72) und einen koaxialen Auslaß (80) auf die Vorderseite des Umlenkteiles aufweist; und daß die Vorderseite des Umlenkteiles (58) eine ringförmige, koaxiale Uberströmungsfläche (68) zum Überströmen durch einen Teilstrom der Farbe bildet, der am Rand dieser Fläche (68) in den auf der stirnseitigen überströmungsfläche (42) der Glocke (12) fließenden Hauptstrom der Farbe einmündet.1.Device for atomizing liquid paint, in particular paint atomizer, with an atomizer bell rotatable about a central axis, which has an annular, coaxial overflow surface on its axially front end face and a central axial breakthrough at its base and is provided with a rotationally symmetrical deflection part above the base, which with the back of its center facing the opening and with its radially outer edge adjacent to the overflow surface, the space between the deflection part and the base being connected to the exposed bell space above the overflow surface in a liquid-conducting manner; and with a nozzle located at the free end of a coaxial paint feed tube, which protrudes into the intermediate space and opens out towards the center of the deflection part, characterized in that the deflection part (58) has a cannula labyrinth (74) with a radial component in its center (62), which has a coaxial inlet (72) opposite the nozzle opening and a coaxial outlet (80) to the front of the deflecting part; and that the front of the deflecting part (58) forms an annular, coaxial overflow surface (68) for overflow by a partial flow of the paint which, at the edge of this surface (68), flows into the main stream flowing on the overflow surface (42) of the bell (12) the color flows. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der radial äußere Rand der Überströmungsfläche (68) des Umlenkteiles (58) und der radial innere Rand der Uberströmungsfläche (42) der Glocke (12) bündig liegen.2. Device according to claim 1, characterized in that the radially outer edge of the overflow surface (68) of the deflecting part (58) and the radially inner edge of the overflow surface (42) of the bell (12) are flush. 3. Einrichtung nach Anspruch 1 oder 2, deren Zerstäuberglocke mit einem einstückig an den radial äußeren Rand des Umlenkteiles angeformten Befestigungsteil zum Befestigen des Umlenkteiles am radial inneren Umfang der Glocke versehen ist, wobei am Übergang vom Umlenk- zum Befestigungsteil im wesentlichen radiale, vom Zwischenraum ausgehende Kanälchen ausgebildet sind, dadurch gekennzeichnet, daß am übergang vom Umlenk- zum Befestigungsteil (58 bzw. 88) ein ringförmiger Hohlraum (96) ausgebildet ist, in den die Kanälchen (98) münden und der über einen Ringspalt (66) zwischen Glocke (12) und Umlenkteil (58) an der Begegnungsstelle der benachbarten Ränder der Überströmungsflächen (42, 68) der Glocke und des Umlenkteiles in den freiliegenden Glockenraum (94) mündet.3. Device according to claim 1 or 2, the atomizer bell is provided with an integrally formed on the radially outer edge of the deflecting fastening part for fastening the deflecting part on the radially inner circumference of the bell, At the transition from the deflection part to the fastening part, essentially radial channels starting from the intermediate space are formed, characterized in that an annular cavity (96) is formed at the transition from the deflection part to the fastening part (58 or 88), into which the channels ( 98) and which opens into the exposed bell space (94) via an annular gap (66) between the bell (12) and the deflection part (58) at the meeting point of the adjacent edges of the overflow surfaces (42, 68) of the bell and the deflection part. 4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß als Hohlraum eine von der Glocke (12) geschlossene Ringnut (96) im Befestigungsteil (88) vorgesehen ist.4. Device according to claim 3, characterized in that an annular groove (96) closed by the bell (12) is provided in the fastening part (88) as the cavity. 5. Einrichtung nach einem der Ansprüche 1 bis 4, deren Umlenkteil im wesentlichen eine Kreisscheibe mit zentraler Nabe ist, die gegen die Düse vorspringt, dadurch gekennzeichnet, daß die Nabe (62) das Kanülenlabyrinth (74) enthält.5. Device according to one of claims 1 to 4, the deflecting part is essentially a circular disc with a central hub which projects against the nozzle, characterized in that the hub (62) contains the cannula labyrinth (74). 6. Einrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Umlenkteil (58) auf seiner Vorderseite eine abgestufte, im wesentlichen zylindrische Vertiefung (76) mit Innenschulter (78) aufweist, auf der ein Einsatzring (80) ruht, dessen zentrale, vorn ausgerundete Bohrung (82) den Auslaß des Kanülenlabyrinths (74) bildet und der vorn bündig mit der Uberströmungsfläche (68) des Umlenkteiles abschließt.6. Device according to one of claims 1 to 5, characterized in that the deflecting part (58) has on its front a stepped, substantially cylindrical recess (76) with an inner shoulder (78) on which an insert ring (80) rests, the Central, rounded front hole (82) forms the outlet of the cannula labyrinth (74) and which is flush at the front with the overflow surface (68) of the deflection part. 7. Einrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Einlaß des Kanülenlabyrinths (74) in der Nabe (62) als koaxiale Bohrung (72) ausgebildet ist, die über mehrere, gleichmäßig verteilte Stichkanülen (86) mit dem Ringraum (84) am Grund der Vertiefung (76) hinter dem Einsatzring (80) verbunden ist.7. Device according to claim 6, characterized in that the inlet of the cannula labyrinth (74) in the hub (62) is designed as a coaxial bore (72) which has several, evenly distributed needle cannulas (86) with the annular space (84) on Bottom of the recess (76) behind the insert ring (80) is connected. 8. Einrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Kanülenlabyrinth (74) einschließlich Ein- und Auslaß (72 bzw. 82) so bemessen ist, daß der Teilstrom der Farbe auf ein Fünftel bis ein Drittel des Gesamtstromes durch die Düse (48) einstellbar ist.8. Device according to one of claims 1 to 7, characterized in that the cannula labyrinth (74) including inlet and outlet (72 or 82) is dimensioned so that the partial flow of the paint to a fifth to a third of the total flow through Nozzle (48) is adjustable.
EP81100134A 1980-01-15 1981-01-10 Apparatus for atomizing liquid paint Expired EP0032391B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3001209 1980-01-15
DE3001209A DE3001209C2 (en) 1980-01-15 1980-01-15 Device for atomizing liquid paint, in particular paint atomizer

Publications (2)

Publication Number Publication Date
EP0032391A1 true EP0032391A1 (en) 1981-07-22
EP0032391B1 EP0032391B1 (en) 1984-04-18

Family

ID=6092060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100134A Expired EP0032391B1 (en) 1980-01-15 1981-01-10 Apparatus for atomizing liquid paint

Country Status (5)

Country Link
US (1) US4405086A (en)
EP (1) EP0032391B1 (en)
JP (1) JPS56102958A (en)
DE (1) DE3001209C2 (en)
ES (1) ES8200239A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050758A1 (en) * 1980-10-24 1982-05-05 Hermann Behr & Sohn GmbH & Co. Atomiser
EP0104394A2 (en) * 1982-08-28 1984-04-04 Hermann Behr & Sohn GmbH & Co. Device for atomising liquid paint
DE3241504A1 (en) * 1982-10-21 1984-04-26 Basf Farben + Fasern Ag, 2000 Hamburg DEVICE AND METHOD FOR ELECTROSTATICALLY COVERING OBJECTS WITH FLUIDS
US4505430A (en) * 1982-11-22 1985-03-19 Ransburg Corporation Self-cleaning atomizer
EP0171042A1 (en) * 1984-08-07 1986-02-12 Behr-Industrieanlagen GmbH & Co. Apparatus for the electrostatic spray-coating of articles
FR2586206A1 (en) * 1985-08-19 1987-02-20 Graco Inc CENTRIFUGAL ATOMIZER HEAD AND THIS ATOMIZER
EP0224052A2 (en) * 1985-11-22 1987-06-03 Binks Manufacturing Company Rapidly cleanable atomizer
EP0250942A2 (en) * 1986-06-26 1988-01-07 Illinois Tool Works Inc. Air bearing rotary atomizer
DE3720200A1 (en) * 1987-06-16 1988-12-29 Ransburg Gmbh SPRAY COATING DEVICE WITH A ROTATIONAL SPRAY ORGAN
GB2224671A (en) * 1988-09-23 1990-05-16 Graco Inc "rotary atomizer"
EP0410717A2 (en) * 1989-07-26 1991-01-30 Illinois Tool Works Inc. Rotary atomizing device
EP0785032A1 (en) * 1996-01-19 1997-07-23 Toyota Jidosha Kabushiki Kaisha Rotary atomizing electrostatic coating apparatus
US5934574A (en) * 1995-12-05 1999-08-10 Van Der Steur; Gunnar Rotary atomizer
EP1480756B2 (en) † 2002-03-01 2022-05-18 Sames Kremlin Device for spraying liquid coating product

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965763U (en) * 1982-10-25 1984-05-02 富士写真フイルム株式会社 Rotating atomization head of the spray device
DE3509874C2 (en) * 1985-03-19 1994-05-19 Behr & Sohn Hermann Misting device for liquid paint
US4997130A (en) * 1986-06-26 1991-03-05 Illinois Tool Works, Inc. Air bearing rotary atomizer
US4919333A (en) * 1986-06-26 1990-04-24 The Devilbiss Company Rotary paint atomizing device
DE8704300U1 (en) * 1987-03-23 1987-09-24 Behr-Industrieanlagen GmbH & Co, 7121 Ingersheim Rotary atomizer with a turbine motor
DE3816417A1 (en) * 1987-05-15 1988-12-01 Ransburg Corp Rotational atomizer apparatus for liquid coating materials
DE3912700C1 (en) * 1989-04-18 1990-10-11 Ransburg-Gema Gmbh, 6056 Heusenstamm, De Rotary spray coater - has atomiser ring with solvent channels, and includes annular air inlets
US5100057A (en) * 1990-03-30 1992-03-31 Nordson Corporation Rotary atomizer with onboard color changer and fluid pressure regulator
FR2661115B1 (en) * 1990-04-24 1992-07-31 Sames Sa DEVICE FOR CENTRIFUGAL SPRAYING OF A COATING PRODUCT, ESPECIALLY FOR APPLICATION BY ELECTROSTATIC SPRAYING.
US5310114A (en) * 1992-09-16 1994-05-10 Cann Roger S Apparatus and method for measuring paint usage in a painting system
DE4342339A1 (en) * 1993-12-11 1995-06-14 Abb Patent Gmbh Rotary atomiser for paint spraying
DE4342336A1 (en) * 1993-12-11 1995-06-14 Abb Patent Gmbh Rotary atomiser, e.g. for paint spraying
DE19506969A1 (en) * 1995-02-13 1996-08-14 Ind Lackieranlagen Schmidt Gmb Fine atomiser for paint or lacquer
US5697559A (en) * 1995-03-15 1997-12-16 Nordson Corporation Electrostatic rotary atomizing spray device
US6056215A (en) * 1995-03-15 2000-05-02 Nordson Corporation Electrostatic rotary atomizing spray device
US6003784A (en) * 1996-04-26 1999-12-21 Gunnar van der Steur Rotary atomizer with internal chamber
US5947377A (en) * 1997-07-11 1999-09-07 Nordson Corporation Electrostatic rotary atomizing spray device with improved atomizer cup
US6189804B1 (en) * 1998-03-27 2001-02-20 Behr Systems, Inc. Rotary atomizer for particulate paints
US8141797B2 (en) 2001-01-25 2012-03-27 Durr Systems Inc. Rotary atomizer for particulate paints
WO2002043873A1 (en) * 2000-11-30 2002-06-06 Abb K. K. Rotary atomizing head
US8303874B2 (en) * 2006-03-28 2012-11-06 E I Du Pont De Nemours And Company Solution spun fiber process
DE102006019890B4 (en) * 2006-04-28 2008-10-16 Dürr Systems GmbH Atomizer and associated operating method
US8602326B2 (en) * 2007-07-03 2013-12-10 David M. Seitz Spray device having a parabolic flow surface
DE102009038290A1 (en) * 2009-08-21 2011-02-24 Abb Ag atomizer
US9399233B2 (en) * 2012-10-01 2016-07-26 Nissan Motor Co., Ltd. Bell cup for a rotary atomizing type electrostatic coating device
US11607705B2 (en) * 2016-04-29 2023-03-21 Michael Kronz Air purging apparatus for a coater
WO2018236467A1 (en) * 2017-04-27 2018-12-27 Michael Kronz A coating apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063642A (en) * 1959-03-31 1962-11-13 Sames Mach Electrostat Rotating heads for electrostatic atomizing and spraying apparatus
FR1363681A (en) * 1962-07-17 1964-06-12 Installation for electrostatically depositing a fluid covering material on an object
GB962030A (en) * 1961-06-13 1964-06-24 Ford Motor Co Method and apparatus for atomizing liquids
DE1427668A1 (en) * 1965-05-21 1969-04-24 Iducal Berlin Hermann Schlimme Paint spray gun with rotating spray edge for electrostatic and pneumatic atomization
DE1577874A1 (en) * 1962-07-17 1969-07-31 Oesterle Dr Ing Kurt M Device for the electrostatic deposit of liquid coating material on a base
DE1427677A1 (en) * 1962-11-15 1970-02-26 Wallis Neil Rudolf Method and apparatus for paint spraying

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017116A (en) * 1958-07-23 1962-01-16 Edward O Norris Electrostatic spraying device
US3233580A (en) * 1962-11-05 1966-02-08 Plastic Materials Inc Material mixing and applying apparatus
AT279775B (en) * 1967-06-15 1970-03-25 Villamos Automatika Intezet Device for simultaneous electrostatic spraying of various substances
FR2412351A1 (en) * 1977-12-20 1979-07-20 Air Ind ELECTROSTATIC PAINTING PROJECTOR WITH BOWL OR ROTATING DISC WITH A PNEUMATIC SEAL
DK143154C (en) * 1979-01-19 1981-11-16 Niro Atomizer As SPRAY WHEEL TO SPRAY FLUID

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3063642A (en) * 1959-03-31 1962-11-13 Sames Mach Electrostat Rotating heads for electrostatic atomizing and spraying apparatus
GB962030A (en) * 1961-06-13 1964-06-24 Ford Motor Co Method and apparatus for atomizing liquids
FR1363681A (en) * 1962-07-17 1964-06-12 Installation for electrostatically depositing a fluid covering material on an object
DE1577874A1 (en) * 1962-07-17 1969-07-31 Oesterle Dr Ing Kurt M Device for the electrostatic deposit of liquid coating material on a base
DE1427677A1 (en) * 1962-11-15 1970-02-26 Wallis Neil Rudolf Method and apparatus for paint spraying
DE1427668A1 (en) * 1965-05-21 1969-04-24 Iducal Berlin Hermann Schlimme Paint spray gun with rotating spray edge for electrostatic and pneumatic atomization

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0050758A1 (en) * 1980-10-24 1982-05-05 Hermann Behr & Sohn GmbH & Co. Atomiser
EP0104394A2 (en) * 1982-08-28 1984-04-04 Hermann Behr & Sohn GmbH & Co. Device for atomising liquid paint
EP0104394A3 (en) * 1982-08-28 1985-06-19 Hermann Behr & Sohn Gmbh & Co. Device for atomising liquid paint
DE3241504A1 (en) * 1982-10-21 1984-04-26 Basf Farben + Fasern Ag, 2000 Hamburg DEVICE AND METHOD FOR ELECTROSTATICALLY COVERING OBJECTS WITH FLUIDS
EP0107030A2 (en) * 1982-10-21 1984-05-02 BASF Lacke + Farben AG Method and apparatus for electrostatically coating objects with fluids
EP0107030A3 (en) * 1982-10-21 1985-09-25 Basf Farben + Fasern Aktiengesellschaft Method and apparatus for electrostatically coating objects with fluids
US4505430A (en) * 1982-11-22 1985-03-19 Ransburg Corporation Self-cleaning atomizer
EP0171042A1 (en) * 1984-08-07 1986-02-12 Behr-Industrieanlagen GmbH & Co. Apparatus for the electrostatic spray-coating of articles
FR2586206A1 (en) * 1985-08-19 1987-02-20 Graco Inc CENTRIFUGAL ATOMIZER HEAD AND THIS ATOMIZER
EP0224052A3 (en) * 1985-11-22 1987-09-02 Binks Manufacturing Company Rapidly cleanable atomizer
EP0224052A2 (en) * 1985-11-22 1987-06-03 Binks Manufacturing Company Rapidly cleanable atomizer
EP0250942A2 (en) * 1986-06-26 1988-01-07 Illinois Tool Works Inc. Air bearing rotary atomizer
EP0250942A3 (en) * 1986-06-26 1989-10-25 The Devilbiss Company (A Delaware Corp.) Air bearing rotary atomizer
DE3720200A1 (en) * 1987-06-16 1988-12-29 Ransburg Gmbh SPRAY COATING DEVICE WITH A ROTATIONAL SPRAY ORGAN
GB2224671A (en) * 1988-09-23 1990-05-16 Graco Inc "rotary atomizer"
GB2224671B (en) * 1988-09-23 1992-12-23 Graco Inc Rotary atomizer
EP0410717A2 (en) * 1989-07-26 1991-01-30 Illinois Tool Works Inc. Rotary atomizing device
EP0410717A3 (en) * 1989-07-26 1991-10-16 Illinois Tool Works Inc. Rotary atomizing device
US5934574A (en) * 1995-12-05 1999-08-10 Van Der Steur; Gunnar Rotary atomizer
EP0785032A1 (en) * 1996-01-19 1997-07-23 Toyota Jidosha Kabushiki Kaisha Rotary atomizing electrostatic coating apparatus
US5909849A (en) * 1996-01-19 1999-06-08 Toyota Jidosha Kabushiki Kaisha Rotary atomizing electrostatic coating apparatus
EP1480756B2 (en) † 2002-03-01 2022-05-18 Sames Kremlin Device for spraying liquid coating product

Also Published As

Publication number Publication date
EP0032391B1 (en) 1984-04-18
US4405086A (en) 1983-09-20
JPS6140468B2 (en) 1986-09-09
ES498489A0 (en) 1981-11-01
DE3001209A1 (en) 1981-07-23
ES8200239A1 (en) 1981-11-01
DE3001209C2 (en) 1985-07-25
JPS56102958A (en) 1981-08-17

Similar Documents

Publication Publication Date Title
EP0032391B1 (en) Apparatus for atomizing liquid paint
EP0715896B1 (en) A rotary atomiser with a rotating bell
DE2541927C3 (en) Atomizing nozzle
DE3931726A1 (en) ROTATIONAL SPRAYER
EP0294606B1 (en) Apparatus for atomizing liquid paint
EP0108929B2 (en) Apparatus for dispensing a liquid
DE69104761T2 (en) Rotary atomizer with integrated color changing device and fluid pressure regulator.
EP0104394B1 (en) Device for atomising liquid paint
DE2852038A1 (en) LIQUID SPRAY DEVICE, IN PARTICULAR LIQUID SPRAY GUN
DE3214314A1 (en) ELECTROSTATIC SPRAYER
DE1577919B2 (en) ELECTROSTATICALLY WORKING PAINT SPRAY DEVICE WITH ADJUSTABLE OPENING ANGLE OF THE PAINT CONE
DE3501145A1 (en) FLOW-ENHANCING LIQUID SPRAYING NOZZLE
EP0217744B1 (en) Spray device for a compressible container
DE3912700C1 (en) Rotary spray coater - has atomiser ring with solvent channels, and includes annular air inlets
DE2514160B2 (en) Electrostatic sprayer for powdery spray material
DE3151929C2 (en) Device for the successive application of different coating liquids
DE3634443C2 (en)
DE2757522C2 (en) Round or ring jet nozzle for generating and blasting a mist or aerosol for coating objects
DE2659428C2 (en) Device for the electrostatic spraying of liquid coating material to be applied to workpieces
DE8607841U1 (en) Device for atomizing liquid paint, in particular paint atomizer
DE3720200A1 (en) SPRAY COATING DEVICE WITH A ROTATIONAL SPRAY ORGAN
DE8000844U1 (en) Device for atomizing liquid paint
DE19935253A1 (en) Electrostatic rotary atomizer
DE19938093B4 (en) Method and rotary atomizer for serial coating of workpieces
DE19517477A1 (en) Air-turbine-driven rotary atomiser with built-in rinsing device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE FR GB SE

17P Request for examination filed

Effective date: 19811016

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE FR GB SE

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921230

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930205

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940111

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19940131

BERE Be: lapsed

Owner name: BEHR HANS

Effective date: 19940131

EUG Se: european patent has lapsed

Ref document number: 81100134.6

Effective date: 19940810

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19991216

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19991224

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20010109

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20010109