EP0283957A2 - Vorrichtung zum Zerstäuben einer Flüssigkeit - Google Patents

Vorrichtung zum Zerstäuben einer Flüssigkeit Download PDF

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Publication number
EP0283957A2
EP0283957A2 EP88104367A EP88104367A EP0283957A2 EP 0283957 A2 EP0283957 A2 EP 0283957A2 EP 88104367 A EP88104367 A EP 88104367A EP 88104367 A EP88104367 A EP 88104367A EP 0283957 A2 EP0283957 A2 EP 0283957A2
Authority
EP
European Patent Office
Prior art keywords
air
jet
jets
fan
nozzle
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
EP88104367A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0283957A3 (en
EP0283957B1 (de
Inventor
Peter Konhäuser
Jürgen Sprenger
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.)
J Wagner GmbH
Original Assignee
J Wagner GmbH
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 J Wagner GmbH filed Critical J Wagner GmbH
Publication of EP0283957A2 publication Critical patent/EP0283957A2/de
Publication of EP0283957A3 publication Critical patent/EP0283957A3/de
Application granted granted Critical
Publication of EP0283957B1 publication Critical patent/EP0283957B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—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 device for the pneumatic atomization of a liquid to form a flat jet, in particular a paint spray gun, according to the preamble of patent claim 1.
  • the liquid to be atomized is supplied to the nozzle almost without pressure, the atomization of the liquid emerging from the nozzle being carried out by the atomizing air which emerges from an annular gap concentrically surrounding the nozzle opening.
  • a flat spray is often desirable.
  • the paint spray gun is provided with two so-called air horns, namely, at a distance from the nozzle on both sides diagonally to the nozzle axis, air outlet openings that direct a jet of horn air, usually somewhat obliquely forward, against the spray jet and compress it into a flat jet.
  • the object of the invention is to improve a device of the type mentioned at the outset in such a way that a flat jet which is essentially completely independent of its respective thickness is achieved, without any special design outlay and without an increased risk of contamination.
  • the solution to this problem results from the characterizing features of patent claim 1.
  • the shaped air jet is fanned out into a jet fan which, together with the opposite fan, compresses the spray jet so uniformly that an actually completely flat flat spray jet is produced. Because the compressed air for the two fan jets is supplied by a separate, controllable compressed air source, it is possible to compress the liquid jet more or less independently of the atomizing air, i.e. to obtain a continuous transition from a round jet to an extremely flat flat jet.
  • a particularly useful embodiment of the invention is characterized in claim 2.
  • the horn air jet is fanned out by an air jet hitting it at a certain angle, which results in a very uniform fan jet, which - together with the opposite fan jet - compresses the spray jet so evenly that an actually completely flat flat spray jet is created.
  • This fan jet is much more uniform than could be achieved with many individual horn air holes.
  • the fact that the horn air jet and the fan jet have the same energy, i.e. if the strength of the horn air also changes the fan air accordingly, it is ensured that the flatness of the flat jet is guaranteed over a wide area, i.e. from a comparatively thick to an extremely thin flat jet.
  • the supply channel for the paint to be sprayed is indicated at 10, the paint exiting to the outside from the mouth end of the channel 10 designed as a nozzle 10a.
  • the paint supply channel 10 is surrounded concentrically by an atomizing air ring channel 11, the atomizing air then coming out of the the nozzle 10a emerges concentrically surrounding the annular gap 11a.
  • the resulting annular and conically widening spray is not shown in FIG. 1.
  • the horn air jets 12a emit at a predetermined angle to the nozzle axis A.
  • two fan air outlet openings 13 are also arranged symmetrically to the nozzle axis A, which essentially lie in the nozzle plane and eject fan air jets 13a parallel to the nozzle axis A.
  • Each of the two horn air jets 12a encloses a predetermined angle ⁇ with the fan air jet 13a assigned to it.
  • the horn air jet 12a coincides with the fan air jet 13a assigned to it at a point T, this point lying outside the spray jet, which, as mentioned, is not shown.
  • the angular collision of the two air jets results in a common fan jet 14 on each side of the nozzle axis A, which is directed at the nozzle axis A at an angle ⁇ .
  • the - imagined - point of impact of the fan rays 14 is designated B in the sketch, the length of the line TB is L. Both fan rays 14 lie in planes perpendicular to the plane of the drawing, these planes each containing the straight line TB. If the two fan jets 14 met (paint and atomizing air switched off), the result would be the flat air jet designated 15 in the sketch, which likewise runs in a plane perpendicular to the paper plane and contains the nozzle axis A. Finally, an angle ⁇ is indicated on the sketch, which is intended to indicate the angular extent of the - not shown - color flat beam.
  • the horn air supply and the fan air supply lie on a common compressed air supply, which can be regulated separately from the atomizing air supply.
  • the air strengths are the same. Differences occurring due to unequal line deflections and the like can be determined by appropriate dimensioning of the bore sizes and / or bore lengths can be compensated for by inserts and the like.
  • a round jet results when the color and atomizing air are switched on.
  • the color jet changes with increasing air pressure via an oval shape to a pronounced flat jet, this change taking place continuously.
  • the angle ⁇ of the color flat jet becomes larger the larger the angle ⁇ , the angle ⁇ or the length L, namely when one of these parameters or a combination of these parameters changes.
  • a change in the inclination of the fan jets and the horn air jets to the nozzle axis A while maintaining the angle ⁇ leads to a change in the flat jet angle ⁇ . The steeper the fan jets hit the spray jet, the greater the flat jet angle ⁇ .
  • horn air and fan air jets are in terms of bundling (needle jet) and jet guidance (axis) and the more precisely these jets meet in their axes, the more precise the design of the air fans and thus the flatness of the surface jet.
  • the flatness of the surface jet thus depends essentially on the guide length of the air holes for horn air and fan air and the accuracy of their direction. It is also essential that the angle ⁇ is not chosen to be greater than 90 °, because otherwise color flashbacks can occur.
  • two horn air outlet openings and two fan air outlet openings can also be provided on both sides of the nozzle axis A;
  • a sufficiently flat flat jet can be achieved on each side of the nozzle axis with just a pair of horn air fan air.
  • Paint nozzle diameter 1.5mm; Diameter of the openings of the horn air: 1mm (one Opening per side); Fan air outlet opening diameter: 1mm (one opening per side); Distance of the fan air outlet holes to the nozzle axis: 3.5mm (parallel to the nozzle axis); Distance of the point of impact T in the flow direction from the nozzle plane: 3.8 mm; Angle of inclination ⁇ of the horn air jet to the fan jet: 70 °; Distance of point B from the paint nozzle: 9mm; Size of the angle ⁇ : 35 °;
  • the pressure of the atomizer air is adjusted to the desired atomization quality depending on the color quality and viscosity.
  • the pressure for the horn and fan air can be changed between zero (omnidirectional jet) and the maximum network pressure (flattest flat jet).
  • FIG. 2 shows a section through the essential part of a practical embodiment of the device according to the invention. Corresponding parts are designated in FIG. 1 with the same reference numbers.
  • the basic structure corresponds to the usual pneumatic flat jet guns with air horns.
  • the drawing can be understood by the person skilled in the art and does not require any additional explanation, 16 being a conventional needle electrode.
  • FIG. 3 differs from that of FIG. 2 in that the two jet fans of the shaped air are not formed by fan jets but by the fact that the shaped air jets 20 are directed against baffles 21, of which the shaped air jets 20 act as jet fans against the liquid jet be reflected.
  • the beam fans are therefore formed here mechanically.

Landscapes

  • Nozzles (AREA)
EP88104367A 1987-03-24 1988-03-18 Vorrichtung zum Zerstäuben einer Flüssigkeit Expired - Lifetime EP0283957B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3709543 1987-03-24
DE3709543A DE3709543C2 (de) 1987-03-24 1987-03-24 Vorrichtung zum Zerstäuben einer Flüssigkeit

Publications (3)

Publication Number Publication Date
EP0283957A2 true EP0283957A2 (de) 1988-09-28
EP0283957A3 EP0283957A3 (en) 1989-05-03
EP0283957B1 EP0283957B1 (de) 1992-05-13

Family

ID=6323808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104367A Expired - Lifetime EP0283957B1 (de) 1987-03-24 1988-03-18 Vorrichtung zum Zerstäuben einer Flüssigkeit

Country Status (4)

Country Link
US (1) US4844347A (un)
EP (1) EP0283957B1 (un)
JP (1) JPS63256154A (un)
DE (1) DE3709543C2 (un)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630930A1 (fr) * 1988-05-03 1989-11-10 Sames Sa Dispositif de pulverisation pneumatique de liquide
FR2636252A1 (fr) * 1988-09-13 1990-03-16 Sames Machine Electrostatique Dispositif de pulverisation pneumatique de liquide, a jet pulverise plat
EP0650766A2 (en) * 1993-10-28 1995-05-03 Ransburg Corporation Suction feed nozzle assembly for HVLP spray gun
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04247252A (ja) * 1991-02-04 1992-09-03 Iwata Air Compressor Mfg Co Ltd 低圧広角パターンスプレーガン
CA2039086A1 (en) * 1991-03-26 1992-09-27 Thomas Barty Spray gun nozzle head
US5307992A (en) * 1992-11-18 1994-05-03 Usbi Co. Method and system for coating a substrate with a reinforced resin matrix
US5530223A (en) * 1993-08-05 1996-06-25 Angelo Po Grandi Cucine S.P.A. Convection and steam oven with a pre-atomizer
GB2283927B (en) * 1993-11-22 1998-01-21 Itw Ltd An improved spray nozzle
DE19537089A1 (de) * 1995-10-05 1997-04-10 Abb Research Ltd Verfahren und Einrichtung zum Pulversprühen
IT1287979B1 (it) * 1996-11-05 1998-09-10 A N I Spa Off Mec Dispositivo di verniciatura a bassa fumosita'
DE10112562B4 (de) * 2001-03-15 2005-02-17 Düsen-Schlick GmbH Aussenmischdüse
DE10202712A1 (de) 2002-01-24 2003-07-31 Duerr Systems Gmbh Verfahren zum Steuern der Sprühstrahlbreite eines Zerstäubers und Zerstäuber für die Serienbeschichtung von Werkstücken
US8955325B1 (en) 2011-08-31 2015-02-17 The United States Of America, As Represented By The Secretary Of The Navy Charged atomization of fuel for increased combustion efficiency in jet engines
KR101776019B1 (ko) * 2015-07-31 2017-09-07 세메스 주식회사 노즐 및 이를 포함하는 기판 처리 장치
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
DE102018118738A1 (de) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Grundkörper für eine Spritzpistole, Spritzpistolen, Spritzpistolen-Set, Verfahren zur Herstellung eines Grundkörpers für eine Spritzpistole und Verfahren zum Umrüsten einer Spritzpistole
DE102018118737A1 (de) 2018-08-01 2020-02-06 Sata Gmbh & Co. Kg Düse für eine Spritzpistole, Düsensatz für eine Spritzpistole, Spritzpistolen und Verfahren zur Herstellung einer Düse für eine Spritzpistole
DE102020106171A1 (de) * 2020-03-06 2021-09-09 Sata Gmbh & Co. Kg Spritzpistole, insbesondere Farbspritzpistole

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553401A (en) * 1945-12-03 1951-05-15 Vilbiss Co Spray gun
US2646313A (en) * 1950-09-13 1953-07-21 Vilbiss Co Spray nozzle
DE966200C (de) * 1951-08-09 1957-07-11 Bersch & Fratscher G M B H Farbspritzpistole mit pneumatischer Farbventilsteuerung
DE1066919B (un) * 1957-10-21 1959-10-08
US4349153A (en) * 1980-07-29 1982-09-14 Champion Spark Plug Company Spray nozzle
DE3111571A1 (de) * 1981-03-24 1982-10-14 Erich 7777 Salem Roser Spruehgeraet zum verspruehen von fluessigkeiten oder anderen fliessfaehigen materialien, insbesondere farben

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1425333A (en) * 1920-10-09 1922-08-08 Spray Engineering Co Method of and apparatus for applying coating
GB259721A (un) * 1924-11-10
DE724706C (de) * 1935-12-10 1942-09-04 Otto Heinrich Spritzvorrichtung mit am Duesenkopf vorgesehenen Hilfsduesen
US2304857A (en) * 1940-03-25 1942-12-15 Saylor Beall Mfg Co Nozzle
US2303280A (en) * 1940-09-09 1942-11-24 Alexander F Jenkins Spray gun
US2271779A (en) * 1941-05-15 1942-02-03 Vilbiss Co Spray nozzle
US4645127A (en) * 1984-08-31 1987-02-24 Spraying Systems Co. Air atomizing spray nozzle
GB2171032B (en) * 1985-02-18 1988-04-20 Nat Res Dev Distributing liquid onto a substrate
DE3505618A1 (de) * 1985-02-19 1986-08-21 Kopperschmidt-Mueller Gmbh & Co Kg, 4800 Bielefeld Verfahren zum beschichten von gegenstaenden mit hilfe eines spruehstrahls und vorrichtung zur durchfuehrung dieses verfahrens

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553401A (en) * 1945-12-03 1951-05-15 Vilbiss Co Spray gun
US2646313A (en) * 1950-09-13 1953-07-21 Vilbiss Co Spray nozzle
DE966200C (de) * 1951-08-09 1957-07-11 Bersch & Fratscher G M B H Farbspritzpistole mit pneumatischer Farbventilsteuerung
DE1066919B (un) * 1957-10-21 1959-10-08
US4349153A (en) * 1980-07-29 1982-09-14 Champion Spark Plug Company Spray nozzle
DE3111571A1 (de) * 1981-03-24 1982-10-14 Erich 7777 Salem Roser Spruehgeraet zum verspruehen von fluessigkeiten oder anderen fliessfaehigen materialien, insbesondere farben

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630930A1 (fr) * 1988-05-03 1989-11-10 Sames Sa Dispositif de pulverisation pneumatique de liquide
US4961536A (en) * 1988-05-03 1990-10-09 Correard Jean Yves Pneumatic liquid spraying device
FR2636252A1 (fr) * 1988-09-13 1990-03-16 Sames Machine Electrostatique Dispositif de pulverisation pneumatique de liquide, a jet pulverise plat
EP0364311A1 (fr) * 1988-09-13 1990-04-18 Sames S.A. Dispositif de pulvérisation pneumatique de liquide, à jet pulvérisé plat
EP0650766A2 (en) * 1993-10-28 1995-05-03 Ransburg Corporation Suction feed nozzle assembly for HVLP spray gun
EP0650766A3 (en) * 1993-10-28 1995-09-20 Ransburg Corp Suction-fed nozzle for low pressure spray guns.
US11950677B2 (en) 2019-02-28 2024-04-09 L'oreal Devices and methods for electrostatic application of cosmetics

Also Published As

Publication number Publication date
JPS63256154A (ja) 1988-10-24
EP0283957A3 (en) 1989-05-03
EP0283957B1 (de) 1992-05-13
US4844347A (en) 1989-07-04
DE3709543C2 (de) 1996-06-05
DE3709543A1 (de) 1988-10-06

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