EP1068023B1 - Pulverisateur rotatif a sources haute tension - Google Patents

Pulverisateur rotatif a sources haute tension Download PDF

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Publication number
EP1068023B1
EP1068023B1 EP98913638A EP98913638A EP1068023B1 EP 1068023 B1 EP1068023 B1 EP 1068023B1 EP 98913638 A EP98913638 A EP 98913638A EP 98913638 A EP98913638 A EP 98913638A EP 1068023 B1 EP1068023 B1 EP 1068023B1
Authority
EP
European Patent Office
Prior art keywords
electrode
housing
spray
atomizer according
spray atomizer
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.)
Expired - Lifetime
Application number
EP98913638A
Other languages
German (de)
English (en)
Other versions
EP1068023A1 (fr
Inventor
Gunther BÖRNER
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 EP1068023A1 publication Critical patent/EP1068023A1/fr
Application granted granted Critical
Publication of EP1068023B1 publication Critical patent/EP1068023B1/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
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • 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
    • 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

Definitions

  • the invention relates to a rotary spray atomizer for applying electrically conductive paint, especially water paint, on surfaces with a housing, in which is a drive motor for the rotary actuation of a front, with a Paint supply connected spray head is arranged, the result of the paint supplied Rotation in a spray, and with at least two parallel to the Longitudinal axis of the housing concentrically arranged to the front, powered by at least one high voltage source and in electrode holders housed electrodes that generate an electric field that the from Spray head spray spray applied against the application surface.
  • Rotary spray atomizers have long been electrostatic in the prior art Coating with electrically conductive paint is generally known (DE 31 30 096 C2 or DE 31 51 929 C2).
  • an engine preferably an engine operated with compressed air, driven spray head the paint to be applied and due to the rotation-related Centrifugal force thrown off.
  • a grounded all around Spray field generated electrical field for use which is concentric with the help arranged tip electrodes by a common high voltage source be supplied, is generated.
  • the sprayed paint droplets are charged in the electrical field that forms between the high-voltage electrodes and the grounded spray head by ions that are created by ionization processes at the tip electrodes.
  • the surface to be coated is switched to a lower potential, usually earth, so that due to the potential difference caused by this, the color particles charged by the electric field are accelerated towards the application surface, where they stick.
  • the field strengths are before the individual tip electrodes and thus the ionization current never the same. This causes an uneven charging of the paint droplets around the atomizer and increases the likelihood of pollution. This unevenness intensifies itself during operation due to wear and dirt. With the previous technology, the different field strengths at the tip electrodes don't fix it.
  • EP 829 306 A which was not previously published, proposed that Decentralize high voltage supply to the electrodes and instead of a single one external high voltage source that supplies all electrodes in each electrode to provide a permanently installed separate high voltage source, so that the high voltage insulation of the rotary atomizer can be omitted.
  • the complete electrode unit is that is, to replace the electrode holder with the electrode regardless of which components are damaged.
  • This is neither economical nor environmentally friendly, since in the event of a detected malfunction usually only either Electrode or the high voltage source or part of the high voltage source, but not both main components are affected by damage.
  • each electrode holder plug-in cascade is arranged as a high voltage source, which the associated, each feeds the electrode arranged on the front. So the high voltage is only present the tip of the electrode holder.
  • the power supply is arranged in each electrode holder High voltage source depending on the power requirement of one of the rotary atomizers immediately adjacent low voltage DC source, for example an accumulator, or provided via a low-voltage line and thus the Requirement for complex high-voltage insulation on the electrode holder limited.
  • the housing of the rotary atomizer Insulated is insulated in accordance with the protection class known in installation technology Housing, with the retained metallic rotor shaft for the necessary grounding is used at least in sections as a conductor, with a current flowing through the air gap in the bearings does not take place because the housing is insulated and itself is accordingly on free potential. that is, there is no difference potential compared to that of the rotor shaft.
  • one at the rear end of the shaft Arrange ring of electrically conductive material which comprises the shaft and with a Earth wire is connected.
  • the gap width of the annular air gap can here be larger than with a shaft bearing, because for the reasons explained above Current flow does not exist.
  • the one arranged in each of the electrode holders is High-voltage source provided to feed the associated electrode formed as a cascade consisting of diodes and capacitors, the serves as a voltage amplifier.
  • the high voltage source can be next to the cascade also a transformer and an inverter can be integrated, which comes from the feeding DC voltage (low voltage) required to supply the cascade AC voltage generated.
  • Measuring elements for cascade current and cascade voltage are provided.
  • the electrode holder is provided with a spring element which is between the electrode and the cascade is arranged.
  • Contact needles on the one hand, with the electrode and on the other hand work together with the cascade, make the electrical connection between the cascade and the electrode safely.
  • the contact security is increased and at the same time the simple Interchangeability of the cascade guaranteed.
  • each electrode holder is designed to be removable and with a union nut or with a bayonet lock connect the assigned housing connection, whereby to avoid contact problems due to moisture or dirt entering the Gap between the respective electrode holder and the connection for this on the housing of the rotary atomizer sealing rings are used.
  • each electrodeholder evenly spaced around the case, the front end of each is designed as a tip which receives the associated electrode.
  • the radial Distance between the housing and an electrode holder should be set so that it corresponds at most to the diameter of an electrode holder.
  • the length of an electrode holder corresponds to at least five times its diameter.
  • the electrode holders are advantageous arranged on a ring that concentrically surrounds the housing.
  • the electrode holders can also each be arranged on holding arms which are attached radially to the housing.
  • FIG. 1 shows a spray atomizer 10 for processing electrically conductive application materials with a housing 12, with a spray head 11 attached to the front and two diametrically opposed electrodes 13 are shown, which the free ends 18 of electrode holders facing the front of the housing 12 24 are arranged.
  • the electrode holders 24 are axially parallel to the longitudinal axis of the housing 12 on one arranged rearward on the housing 12 concentrically adjoining ring 16.
  • an electrode holder 24 consists of a high voltage generator 17, which is housed in a housing 15, and a receptacle 14 for the electrode 13.
  • a contact pin 23 carries the high voltage from the high voltage generator 17 for electrode holder 14.
  • the high voltage generator is on the ring with a plug contact 20 with a low voltage supply line 19 connected.
  • the electrode holder 14 is open the housing 15 of the high voltage generator 17 screwed on, so that an exchange of the electrode without the complete change of the electrode holder 24 can.
  • the integrated in the housing 15 high voltage generator 17 is in the subsequent Ring 16 inserted interchangeably.
  • the attachment takes place by means of a Union nut 21 with thread or with bayonet lock. For sealing are arranged between the electrode holder 24 and the concentric ring 16 O-rings 22.
  • a control and / or control device can be integrated, by means of which the electrical parameters adjusted, monitored and corrected if necessary.
  • Fig. 3 is a partial section through the housing, through which is designed as a turbine Drive 40 and the spray head 11 shown.
  • the drive shaft is designed as a metallic hollow shaft 46 and is also supported in the conductive turbine housing 44. However, there is no galvanic connection between the shaft 46 and the turbine housing 44; both are by one Air gap 45 separated from each other.
  • the turbine housing 44 is insulated layer 42 isolated from other parts carrying earth potential. The commutation the current comes from the shaft 46 via an earthed ring 48.
  • the ring is made of one material, for example Made of carbon, which results in low spattering in combination with the Shaft material, preferably steel, tends.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Claims (10)

  1. Pulvérisateur rotatif pour l'application sur des surfaces de peinture conductrice de l'électricité, en particulier de peinture à l'eau, comprenant un carter (12) dans lequel est disposé un moteur d'entraínement (40) pour la rotation d'une tête de pulvérisation (11) rapportée frontalement, relié à une arrivée de peinture et distribuant la peinture sous l'effet de la rotation sous forme de brouillard, ainsi qu'au moins deux porte-électrode (24) disposés sur un cercle concentrique au carter (12), s'étendant parallèlement à l'axe longitudinal du carter vers le côté frontal et refermant chacun une électrode (13) dépassant frontalement, alimentée par une source haute tension (17), lesdites électrodes (13) produisant un champ électrique qui sollicite le brouillard distribué par la tête de pulvérisation (11) contre surface d'application, caractérisé par le fait qu'une source haute tension (17) en forme de cascade (15) est disposée de façon enfichable dans chaque porte-électrode (24, cette source alimentant l'électrode (13) associée et étant reliée à une source basse tension en vue de son alimentation.
  2. Pulvérisateur rotatif selon la revendication 1, caractérisé par le fait qu'un élément de ressort (18) est disposé dans chaque porte-électrode (24) entre la cascade (15) et l'électrode (13) associée pour assurer la liaison électrique et garantir un contact fiable.
  3. Pulvérisateur rotatif selon la revendication 1 ou 2, caractérisé par le fait que la source tension (17) en forme de cascade disposée dans chaque porte-électrode (24) entre la cascade (15) et l'électrode (13) associée est constituée d'un agencement en cascade de diodes et de condensateurs, servant d'amplificateur de tension.
  4. Pulvérisateur rotatif selon l'une revendications précédentes, caractérisé par le fait qu'il comprend six porte-électrode (24) disposés à distance uniforme les uns des autres autour du carter (12), leur extrémité frontale étant conformée en pointe (14) recevant l'électrode (13) associée.
  5. Pulvérisateur rotatif selon l'une des revendications précédentes, caractérisé par le fait que la distance radiale entre le carter (12) et un porte-électrode (24) correspond au plus au diamètre du porte-électrode (24).
  6. Pulvérisateur rotatif selon l'une des revendications précédentes, caractérisé par le fait que la longueur d'un porte-électrode (24) correspond au moins à cinq fois son diamètre.
  7. Pulvérisateur rotatif selon l'une des revendications précédentes, caractérisé par le fait que les porte-électrode (24) sont disposés sur un anneau (16) concentrique entourant le carter (12).
  8. Pulvérisateur rotatif selon l'une des revendications 1 à 6, caractérisé par le fait que les porte-électrode (24) sont disposés respectivement sur des bras porteurs disposés radialement sur le carter (12).
  9. Pulvérisateur rotatif selon l'une des revendications précédentes, caractérisé par le fait que chaque source haute tension (17) forme avec l'électrode (13) associée un module pouvant être remplacé en bloc.
  10. Pulvérisateur rotatif selon l'une des revendications précédentes, caractérisé par le fait que le carter de turbine (42) est hors potentiel et que la commutation de courant s'effectue à l'extérieur de la turbine (40) par des électrodes, en particulier une bague (48).
EP98913638A 1998-03-04 1998-03-04 Pulverisateur rotatif a sources haute tension Expired - Lifetime EP1068023B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/001217 WO1999044748A1 (fr) 1998-03-04 1998-03-04 Pulverisateur rotatif a sources haute tension

Publications (2)

Publication Number Publication Date
EP1068023A1 EP1068023A1 (fr) 2001-01-17
EP1068023B1 true EP1068023B1 (fr) 2002-03-27

Family

ID=8166885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98913638A Expired - Lifetime EP1068023B1 (fr) 1998-03-04 1998-03-04 Pulverisateur rotatif a sources haute tension

Country Status (8)

Country Link
US (1) US6439485B1 (fr)
EP (1) EP1068023B1 (fr)
JP (1) JP4128742B2 (fr)
KR (1) KR100486466B1 (fr)
CA (1) CA2322256C (fr)
DE (1) DE59803579D1 (fr)
ES (1) ES2174429T3 (fr)
WO (1) WO1999044748A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7070130B1 (en) * 2002-11-06 2006-07-04 E. I. Dupont De Nemours And Company Rotatable electrode ring and use thereof in electrostatically assisted high-speed rotary application of spray coating agents
RU2245195C1 (ru) * 2003-06-30 2005-01-27 Залюбовский Андрей Фадеевич Устройство для электростатического нанесения водорастворимых красителей
JP4445830B2 (ja) * 2004-10-14 2010-04-07 ランズバーグ・インダストリー株式会社 静電式散布装置
EP1911521B1 (fr) * 2005-08-01 2010-07-14 Abb K.K. Dispositif de revêtement électrostatique
JP5373784B2 (ja) * 2007-07-10 2013-12-18 イリノイ トゥール ワークス インコーポレイティド 塗装材料の放出装置および放出方法
USD656538S1 (en) * 2009-03-13 2012-03-27 Durr Systems, Inc. Linear color changer component
USD659753S1 (en) * 2009-04-20 2012-05-15 Panasonic Electric Works Sunx, Co., Ltd. Light irradiation device for print machine

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
US2784114A (en) * 1951-11-26 1957-03-05 Ransburg Electro Coating Corp Spray coating apparatus and method
US3393662A (en) * 1964-12-30 1968-07-23 Ronald J. Blackwell Apparatus for electrostatic spray coating
US4682735A (en) * 1983-06-29 1987-07-28 Graco Inc. Electrostatic field indicator light for electrostatic nozzles
EP0171042B1 (fr) * 1984-08-07 1988-07-27 Behr-Industrieanlagen GmbH & Co. Dispositif pour l'enduction électrostatique d'articles
US4771949A (en) * 1984-10-29 1988-09-20 Hermann Behr & Sohn Gmbh & Co. Apparatus for electrostatic coating of objects
DE3609240C2 (de) * 1986-03-19 1996-08-01 Behr Industrieanlagen Vorrichtung zum elektrostatischen Beschichten von Gegenständen
US4887770A (en) * 1986-04-18 1989-12-19 Nordson Corporation Electrostatic rotary atomizing liquid spray coating apparatus
DE3709508A1 (de) * 1987-03-23 1988-10-06 Behr Industrieanlagen Vorrichtung zum elektrostatischen beschichten von werkstuecken
DE3720201C1 (de) * 1987-06-16 1988-09-08 Ransburg Gmbh Spruehbeschichtungseinrichtung mit einer ringfoermigen Elektrodenanordnung fuer elektrisch leitfaehige Beschichtungsfluessigkeiten
JPS6411661A (en) * 1987-07-02 1989-01-17 Toyota Motor Corp Rotary atomizing electrostatic coating device
US4995560A (en) * 1989-07-18 1991-02-26 Illinois Tool Works, Inc. Paint hose extension for electrostatic spray gun
JP2926071B2 (ja) * 1990-05-18 1999-07-28 エービービー株式会社 静電塗装装置
US5397063A (en) * 1992-04-01 1995-03-14 Asahi Sunac Corporation Rotary atomizer coater
JPH0810658A (ja) * 1994-06-28 1996-01-16 Abb Ransburg Kk 回転霧化型静電塗装装置
ES2188744T3 (es) * 1995-04-06 2003-07-01 Abb Kk Dispositivo de revestimiento del tipo que presenta una cabeza de pulverizacion rotativa.
JPH08257441A (ja) * 1996-02-02 1996-10-08 Trinity Ind Corp 回転霧化式静電塗装機
DE19637308A1 (de) * 1996-09-13 1998-03-19 Abb Patent Gmbh Rotationssprühzerstäuber

Also Published As

Publication number Publication date
JP4128742B2 (ja) 2008-07-30
WO1999044748A1 (fr) 1999-09-10
JP2002505184A (ja) 2002-02-19
US6439485B1 (en) 2002-08-27
ES2174429T3 (es) 2002-11-01
DE59803579D1 (de) 2002-05-02
KR100486466B1 (ko) 2005-04-29
KR20010041137A (ko) 2001-05-15
CA2322256A1 (fr) 1999-09-10
CA2322256C (fr) 2006-09-05
EP1068023A1 (fr) 2001-01-17

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