EP0829306A2 - Pulvérisateur rotatif - Google Patents

Pulvérisateur rotatif Download PDF

Info

Publication number
EP0829306A2
EP0829306A2 EP97115490A EP97115490A EP0829306A2 EP 0829306 A2 EP0829306 A2 EP 0829306A2 EP 97115490 A EP97115490 A EP 97115490A EP 97115490 A EP97115490 A EP 97115490A EP 0829306 A2 EP0829306 A2 EP 0829306A2
Authority
EP
European Patent Office
Prior art keywords
electrode
spray
housing
voltage source
atomizer according
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
EP97115490A
Other languages
German (de)
English (en)
Other versions
EP0829306A3 (fr
EP0829306B1 (fr
Inventor
Gunter Dr. Börner
Harald Sonnleitner
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.)
ABB Patent GmbH
Original Assignee
ABB Patent 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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0829306A2 publication Critical patent/EP0829306A2/fr
Publication of EP0829306A3 publication Critical patent/EP0829306A3/fr
Application granted granted Critical
Publication of EP0829306B1 publication Critical patent/EP0829306B1/fr
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
    • 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
    • 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
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0533—Electrodes specially adapted therefor; Arrangements of electrodes

Definitions

  • the invention relates to a rotary spray atomizer for applying electrically conductive paint, in particular water-based paint, to surfaces with a housing in which a drive motor for rotating a spray bell attached to the front and connected to a paint supply is arranged, which releases the paint supplied as a result of rotation in a spray mist. and with at least two concentrically arranged electrodes extending parallel to the longitudinal axis of the housing towards the front, fed by at least one high-voltage source and accommodated in electrode holders, which produce an electric field which acts on the spray mist emitted by the spray head against the application surface.
  • Rotary spray atomizers have long been known in the prior art for electrostatic coating with electrically conductive paint (DE 31 30 096 C2 or DE 31 51 929 C2).
  • the paint to be applied is fed to a spray bell which is rotatably mounted and driven by a motor, preferably by a motor operated with compressed air, and is thrown off due to the centrifugal force caused by the rotation.
  • a motor preferably by a motor operated with compressed air
  • an electrical field generated around the spray head is used, which is generated with the help of concentrically arranged electrodes, which are supplied by a common high-voltage source.
  • the surface to be coated is switched to a low potential, usually earth, so that due to the resulting difference in potential, the color particles charged by the electric field are accelerated towards the application surface, where they adhere.
  • the high-voltage source arranged in each of the electrode holders for supplying the associated electrode is a cascade consisting of diodes and capacitors, which serves as a voltage amplifier.
  • Another advantageous embodiment of the invention provides that at least two electrode holders are evenly spaced around the housing, the front end of which is designed as a tip which receives the associated electrode.
  • the radial distance between the housing and an electrode holder is set so that it corresponds at most to the diameter of the electrode holder.
  • the length of an electrode holder corresponds to at least five times its diameter.
  • the high voltage at each electrode can be set separately for the formation of an optimal electric field.
  • the division of the central high-voltage source into several high-voltage sources without a supply line results in a significantly lower discharge energy. This reduces the risk potential.
  • the electrode holders are advantageously arranged on a ring which concentrically surrounds the housing.
  • the electrode holders can also be arranged on holding arms which are attached radially to the housing.
  • each high-voltage source with the associated electrode forms a structural unit that is interchangeable en bloc and thus allows a quick troubleshooting.
  • the basic principle according to the invention of supplying the electrodes with high voltage individually means that failure of an electrode due to damage or contamination can be quickly recognized. Since the design of the high-voltage supply according to the invention is simple If necessary, permanent monitoring of the electrical parameters in the low-voltage range, namely on the supply line, faults that occur are immediately recognized and displayed, so that the necessary remedial measures can be started immediately.
  • FIG. 1 shows a side view of a spray atomizer according to the invention.
  • FIG. Shows a spray atomizer 10 for processing electrically conductive application materials with a housing 12 connected to ground, with a spray bell 14 attached at the front and two diametrically opposed electrodes 16 which are located on the free ends facing the front of the housing 12 18 of electrode holders 20 are arranged.
  • the electrode holders 20 are arranged axially parallel to the longitudinal axis of the housing 12 on a ring 26 concentrically adjoining the rear of the housing 12 and, as shown in the longitudinal section shown in the single figure on the right side, receive a high voltage source 22 which is connected to the front outstanding electrode 16 cooperates and is supplied with low voltage via a schematically illustrated line 24.
  • a monitoring arrangement which monitors the electrical parameters can be inserted into this low-voltage supply line.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
EP97115490A 1996-09-13 1997-09-08 Pulvérisateur rotatif Expired - Lifetime EP0829306B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19637308A DE19637308A1 (de) 1996-09-13 1996-09-13 Rotationssprühzerstäuber
DE19637308 1996-09-13

Publications (3)

Publication Number Publication Date
EP0829306A2 true EP0829306A2 (fr) 1998-03-18
EP0829306A3 EP0829306A3 (fr) 1999-03-17
EP0829306B1 EP0829306B1 (fr) 2003-11-12

Family

ID=7805523

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97115490A Expired - Lifetime EP0829306B1 (fr) 1996-09-13 1997-09-08 Pulvérisateur rotatif

Country Status (2)

Country Link
EP (1) EP0829306B1 (fr)
DE (2) DE19637308A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044748A1 (fr) * 1998-03-04 1999-09-10 Abb Patent Gmbh Pulverisateur rotatif a sources haute tension
WO2002043874A1 (fr) * 2000-12-01 2002-06-06 Abb Service S.R.L. Cabine de pulverisation equipee d'un disque electrostatique ameliore

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0913612B1 (fr) 1997-11-03 2003-04-02 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE & CO. KG. Procédé de connexion d'un tuyau avec un raccord de tuyau, une connexion entre un tuyau et un raccord de tuyau ainsi qu'un raccord de tuyau pour ceci

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151929C2 (de) 1981-12-30 1985-11-14 Ransburg Gmbh, 6056 Heusenstamm Vorrichtung zum aufeinanderfolgenden Auftragen verschiedener Überzugsflüssigkeiten
DE3130096C2 (fr) 1980-08-04 1987-07-09 Ransburg Japan, Ltd., Tokio/Tokyo, Jp

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731145A (en) * 1970-11-23 1973-05-01 Nordson Corp Electrostatic spray gun with self-contained miniaturized power pack integral therewith
GB1425506A (en) * 1972-03-03 1976-02-18 Redelec High-voltage dc generator in an electrostatic apparatus
DE2514717A1 (de) * 1975-04-04 1976-10-14 Bauer Reinhold Beflockungsgeraet
US4589597A (en) * 1983-10-03 1986-05-20 Graco Inc. Rotary atomizer spray painting device
US4771949A (en) * 1984-10-29 1988-09-20 Hermann Behr & Sohn Gmbh & Co. Apparatus for electrostatic coating of objects
DE3616684A1 (de) * 1986-05-16 1987-11-19 Behr Industrieanlagen Zerstaeuber zum elektrostatischen beschichten von gegenstaenden
DE3709508A1 (de) * 1987-03-23 1988-10-06 Behr Industrieanlagen Vorrichtung zum elektrostatischen beschichten von werkstuecken
US5044564A (en) * 1989-11-21 1991-09-03 Sickles James E Electrostatic spray gun
DE4227455C2 (de) * 1992-08-19 1996-04-04 Wagner Int Vorrichtung zum elektrostatischen Nachbeschichten der Innenflächen von Schweißnähten
JPH08108106A (ja) * 1994-10-07 1996-04-30 Ikuo Tochisawa 静電塗装方法及び静電塗装機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130096C2 (fr) 1980-08-04 1987-07-09 Ransburg Japan, Ltd., Tokio/Tokyo, Jp
DE3151929C2 (de) 1981-12-30 1985-11-14 Ransburg Gmbh, 6056 Heusenstamm Vorrichtung zum aufeinanderfolgenden Auftragen verschiedener Überzugsflüssigkeiten

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044748A1 (fr) * 1998-03-04 1999-09-10 Abb Patent Gmbh Pulverisateur rotatif a sources haute tension
WO2002043874A1 (fr) * 2000-12-01 2002-06-06 Abb Service S.R.L. Cabine de pulverisation equipee d'un disque electrostatique ameliore
US6833029B2 (en) 2000-12-01 2004-12-21 Transmetal S.P.A. Spray booth with improved electrostatic disk

Also Published As

Publication number Publication date
DE59710984D1 (de) 2003-12-18
EP0829306A3 (fr) 1999-03-17
EP0829306B1 (fr) 2003-11-12
DE19637308A1 (de) 1998-03-19

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