EP1177050B1 - Hochrotationszerstäuber mit lenkluftring - Google Patents
Hochrotationszerstäuber mit lenkluftring Download PDFInfo
- Publication number
- EP1177050B1 EP1177050B1 EP99910346A EP99910346A EP1177050B1 EP 1177050 B1 EP1177050 B1 EP 1177050B1 EP 99910346 A EP99910346 A EP 99910346A EP 99910346 A EP99910346 A EP 99910346A EP 1177050 B1 EP1177050 B1 EP 1177050B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bell
- air ring
- ring
- rotary atomizer
- directing air
- 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
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
- 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
-
- 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
- B05B5/0426—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
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
Definitions
- the invention relates to a rotary atomizer with external charging, the Applying conductive lacquers, in particular water-based lacquer, to one to be coated Surface of a body can be used.
- Rotary atomizers are for example in DE 31 30 096 C2, DE 31 51 929 C2 and EP 0 829 306 A2.
- the water-based paint is fed centrally to a bell that moves at high speed rotates (10000 rpm to 70000 rpm). Due to the centrifugal force Paint led to the edge of the bell and thrown from there in the form of small drops.
- the droplets move parallel to the surface of the at the first flight moment object to be coated, which is located in the front of the atomizer.
- a Airflow from the atomizer towards the object to be coated becomes the Droplets are then directed towards the object to be coated.
- the air will behind the bell from the atomizer directed out of holes or slots.
- the droplets become electrostatic charged. This is done by needle electrodes, which are attached radially around the bell are and are at negative DC potential.
- the tension is in Range between - 40 kV and - 100 kV.
- the high field strengths that occur the needle tips (> 25 kV / cm) lead to ionization of the air in front of the needle tips.
- the resulting electrons attach themselves to air molecules and form negative ones Ions that are in the electric field to the bell at earth potential and move to the grounded object to be coated.
- the higher the field strength and charge the higher the force and thus the efficiency of the order are.
- There is an upper limit for the applied voltage From a given Voltage levels beat the uniform corona discharges into so-called Streamers around. On the one hand, this leads to a very uneven charging of the droplets and, on the other hand, the breakdown between the needle electrodes and initiate the grounded bell.
- the invention has for its object a high-ration atomizer with external discharge and steering air ring, with which an increased efficiency with reduced Tendency to discharge is reached.
- the steering air ring is not directly earthed for this purpose but connected to the earth potential via an ohmic resistor.
- Fig. 1 shows a section of an atomizer with a turbine 3, which is made of a conductive material (metal and carbon). This is immediately grounded.
- the turbine is usually equipped with an air bearing. Rolling bearings are also possible.
- the shaft 4 of the turbine 3 is a hollow shaft in which the conductive ink supply line 5 and the solvent supply line and color return line, not shown here, are located.
- the bell 6 is attached, which is usually made of metal.
- the paint supplied in the paint tube 5 exits through the openings 7 and 8 and runs on the face of the bell 6 to the edge of the bell from which the paint is sprayed.
- the turbine 4 is surrounded by a housing 1 made of non-conductive material (usually plastic).
- the air 20, 21 is guided to the front of the atomizer by appropriate components made of insulating material 2, 9, 11 .
- the steering air ring 13 made of conductive material has openings 12 for the steering air 21.
- the steering air ring 13 is electrically connected to the turbine 3 via one or more parallel resistors 17 (resistance components). Good contacting can be achieved, for example, by springs 16 .
- the conductive steering air ring 13 is provided with an insulating part 11 toward the bell, which primarily covers the edge of the steering air ring 13 .
- Auxiliary air 20 is also passed through openings 10 in this insulating ring 11 , which avoids air turbulence at the edge of the bell.
- the bell 6 is additionally covered on the outside with an insulating part 22 in order to further increase the security against flashovers.
- connection between the steering air ring 13 and the grounded turbine 2 can also take place via components 23 which are made of a material which accordingly has the same electrical resistance as the resistors 17 listed above. This is shown in Fig. 3 as an embodiment.
- the steering air ring 13 is manufactured itself from high-resistance material and to connect it to earth.
- the resistance between the edge of the steering air ring that the needle electrodes is facing, and the earth potential is in the range of 10 M ⁇ to 500 M ⁇ .
- the aim should be that at the edge of the steering air ring 13 , which faces the electrode holder 18 with the needle electrodes 19 , no high field strengths occur, which lead to streamer discharges.
- a high-resistance connection can be introduced between the conductive steering air ring 13 and the plastic cover 15 , which reduces the potential.
- 4 shows a simple exemplary embodiment. Between the steering air ring 13 and the plastic cover 15 , a ring 14 made of high-resistance material (for example plastic with added graphite or soot) is placed. This must finally touch the plastic cover 15 around the entire circumference.
- the total flow of the atomizer is the sum of the three partial currents to the earthed object I o , to the earthed bell I g and to the steering air ring I l .
- I I O + I l + I G.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1999/001705 WO2000054888A1 (de) | 1999-03-16 | 1999-03-16 | Hochrotationszerstäuber mit lenkluftring |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1177050A1 EP1177050A1 (de) | 2002-02-06 |
EP1177050B1 true EP1177050B1 (de) | 2003-01-22 |
Family
ID=8167242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99910346A Expired - Lifetime EP1177050B1 (de) | 1999-03-16 | 1999-03-16 | Hochrotationszerstäuber mit lenkluftring |
Country Status (9)
Country | Link |
---|---|
US (1) | US6565021B2 (es) |
EP (1) | EP1177050B1 (es) |
JP (1) | JP4343445B2 (es) |
KR (1) | KR100492233B1 (es) |
AU (1) | AU2933299A (es) |
CA (1) | CA2367140C (es) |
DE (1) | DE59904125D1 (es) |
ES (1) | ES2189399T3 (es) |
WO (1) | WO2000054888A1 (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011006617B4 (de) | 2011-04-01 | 2018-08-16 | Bayerische Motoren Werke Aktiengesellschaft | Rotationszerstäuber mit Außenelektroden zum Beschichten eines Werkstücks |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10202711A1 (de) * | 2002-01-24 | 2003-07-31 | Duerr Systems Gmbh | Zerstäuber für die elektrostatische Serienbeschichtung von Werkstücken |
JP2004167411A (ja) * | 2002-11-21 | 2004-06-17 | Anest Iwata Corp | 静電塗装用高電圧発生器 |
US6929823B2 (en) * | 2003-05-01 | 2005-08-16 | E. I. Du Pont De Nemours And Company | Process for the high-speed rotary application of liquid, pigmented coating agents |
JP2007000826A (ja) * | 2005-06-27 | 2007-01-11 | Duerr Japan Kk | ベル型塗装装置 |
US20090020626A1 (en) | 2007-07-16 | 2009-01-22 | Illinois Tool Works Inc. | Shaping air and bell cup combination |
US20090314855A1 (en) * | 2008-06-18 | 2009-12-24 | Illinois Tool Works Inc. | Vector or swirl shaping air |
DE102009013979A1 (de) | 2009-03-19 | 2010-09-23 | Dürr Systems GmbH | Elektrodenanordnung für einen elektrostatischen Zerstäuber |
US9022361B2 (en) | 2012-01-05 | 2015-05-05 | Ledebuhr Industries, Inc. | Rotary atomizer drip control method and apparatus |
DE102015000709A1 (de) * | 2015-01-21 | 2016-07-21 | Dürr Systems GmbH | Glockenteller oder Lenkluftring mit nicht-metallischem Material zur Funkenvermeidung |
WO2019035473A1 (ja) * | 2017-08-18 | 2019-02-21 | Abb株式会社 | 静電塗装機 |
WO2019035472A1 (ja) * | 2017-08-18 | 2019-02-21 | Abb株式会社 | 静電塗装機 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1209653A (en) * | 1968-07-02 | 1970-10-21 | Air O Static Inc | Apparatus for electrostatic spray coating |
JPS58190457U (ja) * | 1982-06-10 | 1983-12-17 | 富士写真フイルム株式会社 | 静電塗装装置 |
US4771949A (en) * | 1984-10-29 | 1988-09-20 | Hermann Behr & Sohn Gmbh & Co. | Apparatus for electrostatic coating of objects |
US4887770A (en) * | 1986-04-18 | 1989-12-19 | Nordson Corporation | Electrostatic rotary atomizing liquid spray coating apparatus |
US5085373A (en) * | 1987-03-23 | 1992-02-04 | Behr Industrieanlagen Gmbh & Co. | Apparatus for coating workpieces electrostatically |
EP0283918B1 (de) * | 1987-03-23 | 1991-07-10 | Behr Industrieanlagen GmbH & Co. | Vorrichtung zum elektrostatischen Beschichten von Werkstücken |
FR2692501B1 (fr) * | 1992-06-22 | 1995-08-04 | Sames Sa | Dispositif de projection electrostatique de produit de revetement liquide a tete de pulverisation rotative. |
JP2830683B2 (ja) * | 1992-09-11 | 1998-12-02 | トヨタ自動車株式会社 | 回転霧化静電塗装装置 |
JPH06320065A (ja) * | 1993-05-07 | 1994-11-22 | Toyota Motor Corp | ベル型静電塗装装置 |
JP3254828B2 (ja) * | 1993-07-12 | 2002-02-12 | トヨタ自動車株式会社 | 回転霧化静電塗装方法およびその装置 |
JPH07256156A (ja) * | 1994-03-25 | 1995-10-09 | Toyota Motor Corp | 回転霧化静電塗装装置 |
EP0767005B1 (en) * | 1995-04-06 | 2002-12-18 | Abb K.K. | Rotary atomizing head type coating machine |
-
1999
- 1999-03-16 CA CA002367140A patent/CA2367140C/en not_active Expired - Fee Related
- 1999-03-16 DE DE59904125T patent/DE59904125D1/de not_active Expired - Lifetime
- 1999-03-16 JP JP2000604953A patent/JP4343445B2/ja not_active Expired - Fee Related
- 1999-03-16 WO PCT/EP1999/001705 patent/WO2000054888A1/de active IP Right Grant
- 1999-03-16 ES ES99910346T patent/ES2189399T3/es not_active Expired - Lifetime
- 1999-03-16 AU AU29332/99A patent/AU2933299A/en not_active Abandoned
- 1999-03-16 KR KR10-2001-7008606A patent/KR100492233B1/ko not_active IP Right Cessation
- 1999-03-16 EP EP99910346A patent/EP1177050B1/de not_active Expired - Lifetime
-
2001
- 2001-09-17 US US09/953,726 patent/US6565021B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011006617B4 (de) | 2011-04-01 | 2018-08-16 | Bayerische Motoren Werke Aktiengesellschaft | Rotationszerstäuber mit Außenelektroden zum Beschichten eines Werkstücks |
Also Published As
Publication number | Publication date |
---|---|
KR20020003189A (ko) | 2002-01-10 |
JP4343445B2 (ja) | 2009-10-14 |
JP2002538957A (ja) | 2002-11-19 |
ES2189399T3 (es) | 2003-07-01 |
AU2933299A (en) | 2000-10-04 |
WO2000054888A1 (de) | 2000-09-21 |
EP1177050A1 (de) | 2002-02-06 |
US20020066809A1 (en) | 2002-06-06 |
CA2367140A1 (en) | 2000-09-21 |
CA2367140C (en) | 2007-06-12 |
KR100492233B1 (ko) | 2005-05-31 |
US6565021B2 (en) | 2003-05-20 |
DE59904125D1 (de) | 2003-02-27 |
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