EP1068023A1 - High voltage source rotary spray - Google Patents
High voltage source rotary sprayInfo
- Publication number
- EP1068023A1 EP1068023A1 EP98913638A EP98913638A EP1068023A1 EP 1068023 A1 EP1068023 A1 EP 1068023A1 EP 98913638 A EP98913638 A EP 98913638A EP 98913638 A EP98913638 A EP 98913638A EP 1068023 A1 EP1068023 A1 EP 1068023A1
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- 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, in particular water-based paint, to surfaces with a housing in which a drive motor is arranged for the rotary actuation of a spray head attached to the front and connected to a paint supply, which dispenses the supplied paint 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 rotatably mounted spray head 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.
- An electrical field generated around the earthed spray head is used, which is generated with the help of concentrically arranged tip electrodes, which are supplied by a common high-voltage source.
- the ejected 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 resulting potential difference, the color particles charged by the electric field are accelerated towards the application surface, where they stick.
- the geometry of the tip electrodes is never completely the same, the field strengths in front of the individual tip electrodes and thus the ionization current are never the same. This causes an uneven charging of the paint droplets around the atomizer and increases the likelihood of contamination. This non-uniformity is exacerbated by wear and dirt during operation. With the previous technology, the different field strengths at the tip electrodes cannot be corrected.
- a pluggable cascade is arranged as a high-voltage source in each electrode holder, which feeds the associated electrode, which is respectively arranged on the front.
- the high voltage therefore only applies to the tip of the electrode holder
- This type of voltage supply ensures that long lines of high-voltage supply with a voltage of approx. 100 kV are avoided and, on the other hand, that the locally arranged high-voltage generator can be easily replaced at any time. This significantly improves operational availability
- the voltage supply to the high-voltage source arranged in each electrode holder is provided by a low-voltage direct-voltage source directly adjacent to the rotary atomizer, for example an accumulator, or via a low-voltage line, thus restricting the need for complex high-voltage insulation to the electrode holder
- the housing of the rotary atomizer is insulated in accordance with the degree of protection insulated housing known in installation technology, the retained metallic rotor shaft being used at least in sections as a conductor for the necessary grounding, a current flow through the air gaps in the bearings not takes place because the housing is insulated and is accordingly at free potential, that is to say that it has no potential difference from that of the rotor shaft
- the high-voltage source which is arranged in each of the electrode holders and is intended to supply the associated electrode, is designed as a cascade consisting of diodes and capacitors, which serves as a voltage amplifier.
- a transformer and an inverter can also be integrated into the high-voltage source, which generates the alternating voltage required to supply the cascade from the direct current (low voltage) supply.
- measuring elements for cascade current and cascade voltage are provided.
- the electrode holder is advantageously provided with a spring element which is arranged between the electrode and the cascade.
- Contact needles which work on the one hand with the electrode and on the other hand with the cascade, ensure the electrical connection between the cascade and the electrode.
- the resilient loading on the one hand the contact security is increased and at the same time the easy interchangeability of the cascade is guaranteed.
- each electrode holder is designed to be removable and connected to the associated housing connection by means of a union nut or by means of a bayonet lock, sealing rings being used to avoid contact problems as a result of moisture or dirt entering the gaps between the respective electrode holder and the connection for this purpose on the housing of the rotary atomizer are used.
- six 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 can be set so that it corresponds at most to the diameter of an electrode holder. 5
- the length of an electrode holder corresponds to at least five times its diameter.
- 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 electrode can be regulated separately. This ensures uniform charging of the paint droplets.
- the configuration of the high-voltage supply according to the invention allows simple, if appropriate permanent, monitoring of the electrical parameters in the low-voltage range, namely on the supply line, any faults that occur are immediately recognized and displayed, so that the necessary remedial measures can be started immediately.
- Figure 1 is an overview of a rotary spray atomizer according to the invention in longitudinal section.
- FIG. 2 shows a rotary atomizer divided along the longitudinal axis with an electrode holder according to the invention shown in longitudinal section and
- Fig. 3 shows a split along the longitudinal axis, shown in partial section
- Rotary atomizer with an electrode holder Rotary atomizer with an electrode holder.
- FIG. 1 shows a spray atomizer 10 for processing electrically conductive application materials with a housing 12, with a spray head 11 attached at the front and two diametrically opposed electrodes 13, which on the free ends 18 of electrode holders 24 facing the front of the housing 12 are arranged.
- the electrode holders 24 are arranged axially parallel to the longitudinal axis of the housing 12 on a ring 16 concentrically adjoining the rear of the housing 12.
- an electrode holder 24 consists of a high-voltage generator 17, which is accommodated in a housing 15, and a receptacle 14 for the electrode 13
- Contact pin 23 conducts the high voltage from the high-voltage generator 17 to the electrode receptacle 14.
- a reliable contact to the electrode 13 is ensured via a spring element 18, which is designed here as a helical compression spring.
- the high-voltage generator is connected to a low-voltage supply line 19 on the ring with a plug contact 20.
- the electrode receptacle 14 is screwed onto the housing 15 of the high-voltage generator 17, so that the electrode can be replaced without having to change the electrode holder 24 completely.
- the high-voltage generator 17 integrated in the housing 15 is interchangeably inserted in the adjoining ring 16.
- the attachment is carried out by means of a union nut 21 with thread or with a bayonet lock.
- 16 O-rings 22 are arranged between the electrode holder 24 and the concentric ring 16.
- a control and / or control device can be integrated in the low-voltage supply line 19, by means of which the electrical parameters can be set, monitored and corrected if necessary. 7
- FIG. 3 shows a partial section through the housing, through the drive 40 designed as a turbine and the spray head 11.
- the drive shaft is designed as a metallic hollow shaft 46 and is supported in the likewise conductive turbine housing 44. However, there is no galvanic connection between the shaft 46 and the turbine housing 44; both are separated from one another by an air gap 45.
- the turbine housing 44 is insulated
- the current is commutated by the shaft 46 via an earthed ring 48.
- the turbine housing 44 is thus at a free potential and a current flow through the air gap 45 is avoided.
- the ring is made of a material, for example carbon, which tends to have little spattering in combination with the shaft material, preferably steel.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1998/001217 WO1999044748A1 (en) | 1998-03-04 | 1998-03-04 | High voltage source rotary spray |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1068023A1 true EP1068023A1 (en) | 2001-01-17 |
EP1068023B1 EP1068023B1 (en) | 2002-03-27 |
Family
ID=8166885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98913638A Expired - Lifetime EP1068023B1 (en) | 1998-03-04 | 1998-03-04 | High voltage source rotary spray |
Country Status (8)
Country | Link |
---|---|
US (1) | US6439485B1 (en) |
EP (1) | EP1068023B1 (en) |
JP (1) | JP4128742B2 (en) |
KR (1) | KR100486466B1 (en) |
CA (1) | CA2322256C (en) |
DE (1) | DE59803579D1 (en) |
ES (1) | ES2174429T3 (en) |
WO (1) | WO1999044748A1 (en) |
Families Citing this family (4)
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 |
JP4445830B2 (en) * | 2004-10-14 | 2010-04-07 | ランズバーグ・インダストリー株式会社 | Electrostatic sprayer |
KR100904009B1 (en) * | 2005-08-01 | 2009-06-22 | 에이비비 가부시키가이샤 | Electrostatic coating device |
JP5373784B2 (en) * | 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 | Coating material discharging apparatus and discharging method |
Family Cites Families (17)
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 |
DE3563917D1 (en) * | 1984-08-07 | 1988-09-01 | Behr Industrieanlagen | Apparatus for the electrostatic spray-coating of articles |
US4771949A (en) * | 1984-10-29 | 1988-09-20 | Hermann Behr & Sohn Gmbh & Co. | Apparatus for electrostatic coating of objects |
DE3609240C2 (en) * | 1986-03-19 | 1996-08-01 | Behr Industrieanlagen | Device for the electrostatic coating of objects |
US4887770A (en) * | 1986-04-18 | 1989-12-19 | Nordson Corporation | Electrostatic rotary atomizing liquid spray coating apparatus |
DE3709508A1 (en) * | 1987-03-23 | 1988-10-06 | Behr Industrieanlagen | Apparatus for the electrostatic coating of workpieces |
DE3720201C1 (en) * | 1987-06-16 | 1988-09-08 | Ransburg Gmbh | Spray coating device with a ring-shaped electrode arrangement for electrically conductive coating liquids |
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 (en) * | 1990-05-18 | 1999-07-28 | エービービー株式会社 | Electrostatic coating equipment |
US5397063A (en) * | 1992-04-01 | 1995-03-14 | Asahi Sunac Corporation | Rotary atomizer coater |
JPH0810658A (en) * | 1994-06-28 | 1996-01-16 | Abb Ransburg Kk | Rotational spraying type electrostatic coating apparatus |
EP0767005B1 (en) * | 1995-04-06 | 2002-12-18 | Abb K.K. | Rotary atomizing head type coating machine |
JPH08257441A (en) * | 1996-02-02 | 1996-10-08 | Trinity Ind Corp | Rotary atomization type electrostaic spray coating device |
DE19637308A1 (en) * | 1996-09-13 | 1998-03-19 | Abb Patent Gmbh | Rotary spray atomizer |
-
1998
- 1998-03-04 JP JP2000534339A patent/JP4128742B2/en not_active Expired - Fee Related
- 1998-03-04 DE DE59803579T patent/DE59803579D1/en not_active Expired - Lifetime
- 1998-03-04 ES ES98913638T patent/ES2174429T3/en not_active Expired - Lifetime
- 1998-03-04 EP EP98913638A patent/EP1068023B1/en not_active Expired - Lifetime
- 1998-03-04 KR KR10-2000-7009185A patent/KR100486466B1/en not_active IP Right Cessation
- 1998-03-04 WO PCT/EP1998/001217 patent/WO1999044748A1/en active IP Right Grant
- 1998-03-04 CA CA002322256A patent/CA2322256C/en not_active Expired - Fee Related
-
2000
- 2000-09-05 US US09/655,283 patent/US6439485B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9944748A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2322256A1 (en) | 1999-09-10 |
CA2322256C (en) | 2006-09-05 |
EP1068023B1 (en) | 2002-03-27 |
JP4128742B2 (en) | 2008-07-30 |
ES2174429T3 (en) | 2002-11-01 |
KR20010041137A (en) | 2001-05-15 |
KR100486466B1 (en) | 2005-04-29 |
JP2002505184A (en) | 2002-02-19 |
DE59803579D1 (en) | 2002-05-02 |
US6439485B1 (en) | 2002-08-27 |
WO1999044748A1 (en) | 1999-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3609240C2 (en) | Device for the electrostatic coating of objects | |
EP0252954B1 (en) | Electrostatic device for powder spraying with triboelectric powder charging | |
DE69002640T2 (en) | Electrostatic spray coating device with rotary atomizer. | |
DE2707218C3 (en) | Electrostatic paint sprayer | |
EP0796663B1 (en) | Rotary atomiser for electrostatic assisted coating of objects with paints or varnishes | |
DE112008002095B4 (en) | Electrostatic coating device | |
EP1362640B1 (en) | Sprayer for electrostatic in-series coating of workpieces | |
DE102005049234A1 (en) | Electrostatic sprayer | |
WO2010105849A1 (en) | Electrode assembly for an electrostatic atomizer | |
EP0283918A2 (en) | Device for electrostatic coating of objects | |
DE4105116C2 (en) | Apparatus and method for the electrostatic coating of objects | |
DE3429075A1 (en) | Device for the electrostatic coating of articles | |
DE1965509C3 (en) | Electrostatic spray gun | |
EP1177050B1 (en) | High-speed rotary atomizer with an air guide ring | |
EP1068023B1 (en) | High voltage source rotary spray | |
EP0171042B1 (en) | Apparatus for the electrostatic spray-coating of articles | |
EP0829306B1 (en) | Rotary atomising device | |
EP1242190A1 (en) | High-speed rotation atomiser for application of powder paint | |
DE10053295A1 (en) | High-speed rotary atomizer for applying powder coating | |
DD268174A5 (en) | DEVICE FOR ELECTROSTATIC COATING OF WORKPIECES | |
DE2652059C2 (en) | Device for the electrostatic application of electrically conductive, in particular water-thinned, dyes | |
EP1481733B1 (en) | Spray bell for rotary sprayers | |
EP2794116B1 (en) | Electrode assembly and electrostatic atomiser having such an electrode assembly |
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 |
|
17P | Request for examination filed |
Effective date: 20001109 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT SE |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 20010719 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ABB PATENT GMBH |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT SE |
|
REF | Corresponds to: |
Ref document number: 59803579 Country of ref document: DE Date of ref document: 20020502 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2174429 Country of ref document: ES Kind code of ref document: T3 |
|
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 |
Effective date: 20021230 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20090324 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20090312 Year of fee payment: 12 |
|
EUG | Se: european patent has lapsed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20110419 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110404 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100305 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20120403 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20120323 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20120322 Year of fee payment: 15 Ref country code: IT Payment date: 20120322 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100305 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20130304 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20131129 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59803579 Country of ref document: DE Effective date: 20131001 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20130304 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20131001 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130402 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130304 |