EP1105220A1 - Elektrodenhalter für eine pulversprühpistole - Google Patents
Elektrodenhalter für eine pulversprühpistoleInfo
- Publication number
- EP1105220A1 EP1105220A1 EP99929157A EP99929157A EP1105220A1 EP 1105220 A1 EP1105220 A1 EP 1105220A1 EP 99929157 A EP99929157 A EP 99929157A EP 99929157 A EP99929157 A EP 99929157A EP 1105220 A1 EP1105220 A1 EP 1105220A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray coating
- coating device
- electrode holder
- powder
- electrode
- 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
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
-
- 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
- Spray coating device for coating powder according to the preamble of claim 1.
- a spray coating device of this type is known from EP 0 383 030 B1. It contains one Electrode holder with an approximately only three millimeter long centering ring, which is used to center the electrode holder from the front into the downstream end of a powder channel of the spray coating device.
- the high-voltage path from a high-voltage generator to at least one high-voltage electrode must be well shielded from the powder path, so that electrostatic charging of the coating powder only from the electrode, so that no electromagnetic fields or electromagnetic forces that are disadvantageous for the powder conveying and spray coating act in the powder channel of the spray coating device he follows.
- leakage currents between the high-voltage conduction path and other parts, for example the powder channel are undesirable because they mean a loss of energy and can also result in undesired electrostatic charging of the powder particles in the powder channel, which in turn leads to powder deposits in the powder channel and in special cases can lead to a "walking" of powder dust along the leakage current path.
- the object of the invention is to avoid electrical leakage currents and undesirable electromagnetic fields between high-voltage conductors and coating powder in the powder channel of the spray coating device, without it being necessary to make the spray coating device larger and / or heavier.
- FIG. 1 shows a longitudinal section through a gun-shaped spray coating device according to the invention
- FIG. 2 shows a front view of a front end face of an electrode holder of the spray coating device from FIG. 1, FIG.
- FIG. 3 shows a rear view of the rear end face of the electrode holder from FIG. 2.
- the spray coating device according to the invention shown in FIG. 1 contains a one-piece housing 2 made of electrically insulating material, which forms a handle 4 and a barrel 6.
- a powder channel 8 extends through the housing 2 and is formed by a handle tube piece 10 and a barrel tube piece 12 which are connected to one another at an angle of less than 180 ° corresponding to the angle between the handle 4 and the barrel 6.
- a powder hose 14 for the supply of coating powder can be connected to the powder channel 8.
- a high-voltage generator 16 accommodated in a chamber of the housing 2 for generating a high voltage in the range between 10 kV and 140 kV or another voltage value is connected on its primary side with a low-voltage cable 18 which can be fastened to the housing 2 and on its secondary side via an electrical conductor 20 with a High-voltage electrode 22 can be electrically connected.
- An electrode holder 24 forms a downstream end section of the powder channel 8.
- the electrode holder 24 has a tube piece 26 which is inserted into the housing 2 from the front and has an inner diameter which is flush with the inner diameter of the barrel tube piece 12.
- the pipe section 26 is a one-piece body made of electrically insulating material and has a rear, upstream pipe section 28, whose outer diameter is smaller than a pipe section 30 adjoining it at the front. Between the two A radial shoulder 32 is formed in pipe section sections 28 and 30.
- An electrical contact device 34 is arranged on this shoulder 32. It contains an electrical contact 36 which is connected to the high-voltage conductor 20 and a contact 38 which is contacted by the latter and which is arranged on the shoulder 32. This electrical contact 38 is connected to the at least one electrode 22 by an electrical connecting line 40 extending through the pipe section 26.
- the axial distance between the electrical contact device 34 and the rear end 42 of the rear tube section 28 is at least 1.5 cm, preferably at most 4 cm, and according to the preferred embodiment is between 2.0 and 3.0 cm, accordingly preferably about 2 cm. 5 cm.
- a groove 44 is formed which surrounds the powder channel 8 with a radial spacing and is in flow connection on the one hand with the front end of a compressed air channel 46 extending through the housing 2 and on the other hand with an air channel extending through the electrode holder 24 48 is in flow communication.
- the tip of the electrode 22 protrudes a few millimeters from the air duct 48 and is located upstream in the vicinity of a spray nozzle opening 52
- End portion of the air duct 48 containing the electrode 22 is formed by a pipe section 54 of the electrode holder 24, which extends axially forward from a web 56.
- the web 56 extends diametrically through the pipe section 26, which is inserted into the housing 2 from the front.
- All parts of the electrode holder 24 together consist of a one-piece body made of electrically insulating material, for. B. plastic.
- the electrode holder 24, together with the electrode 22 and the electrical connection 40 and the contact 38, is an exchangeable body which is arranged interchangeably between a nozzle body 58 of the spray nozzle opening 52 and the housing 2.
- a union nut 60 needs to be removed from the front end of the barrel 6 so that the nozzle body 58 releases the electrode holder 24.
- a pipe socket 62 which is integral with it, extends forward, into which the nozzle body 58 is inserted from the front.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29924481U DE29924481U1 (de) | 1998-08-22 | 1999-06-09 | Sprühbeschichtungsvorrichtung für Beschichtungspulver |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19838278A DE19838278A1 (de) | 1998-08-22 | 1998-08-22 | Sprühbeschichtungsvorrichtung für Beschichtungspulver |
DE19838278 | 1998-08-22 | ||
PCT/EP1999/003963 WO2000010722A1 (de) | 1998-08-22 | 1999-06-09 | Elektrodenhalter für eine pulversprühpistole |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1105220A1 true EP1105220A1 (de) | 2001-06-13 |
EP1105220B1 EP1105220B1 (de) | 2003-04-23 |
Family
ID=7878450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99929157A Expired - Lifetime EP1105220B1 (de) | 1998-08-22 | 1999-06-09 | Elektrodenhalter für eine pulversprühpistole |
Country Status (8)
Country | Link |
---|---|
US (1) | US6562138B1 (de) |
EP (1) | EP1105220B1 (de) |
JP (1) | JP4369058B2 (de) |
AT (1) | ATE238104T1 (de) |
CA (1) | CA2341186C (de) |
DE (2) | DE19838278A1 (de) |
ES (1) | ES2194475T3 (de) |
WO (1) | WO2000010722A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005017931A1 (de) * | 2005-04-18 | 2006-10-19 | Itw Gema Ag | Pulversprühbeschichtungspistole und Pistolengehäuse hierzu |
DE202005012863U1 (de) * | 2005-08-12 | 2005-10-27 | J. Wagner Ag | Elektrodenhalter für eine Pulversprühvorrichtung |
EP2050506A1 (de) * | 2007-10-19 | 2009-04-22 | Boxal Netherlands B.V. | Pulverbeschichtungssprühvorrichtung |
CN104245147B (zh) | 2012-04-12 | 2018-11-06 | 诺信公司 | 包括耐磨电极支撑件的粉末喷枪 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964683A (en) | 1975-09-02 | 1976-06-22 | Champion Spark Plug Company | Electrostatic spray apparatus |
GB8721481D0 (en) | 1987-09-11 | 1987-10-21 | Volstatic Ltd | Powder delivery apparatus |
DE3904438A1 (de) * | 1989-02-14 | 1990-08-16 | Gema Ransburg Ag | Spruehbeschichtungsgeraet zum elektrostatischen spruehbeschichten |
DE19546970B4 (de) * | 1995-12-15 | 2006-08-17 | Itw Gema Ag | Pulversprühvorrichtung zur elektrostatischen Sprühbeschichtung |
-
1998
- 1998-08-22 DE DE19838278A patent/DE19838278A1/de not_active Withdrawn
-
1999
- 1999-06-09 EP EP99929157A patent/EP1105220B1/de not_active Expired - Lifetime
- 1999-06-09 DE DE59905216T patent/DE59905216D1/de not_active Expired - Lifetime
- 1999-06-09 JP JP2000566030A patent/JP4369058B2/ja not_active Expired - Fee Related
- 1999-06-09 WO PCT/EP1999/003963 patent/WO2000010722A1/de active IP Right Grant
- 1999-06-09 US US09/763,352 patent/US6562138B1/en not_active Expired - Lifetime
- 1999-06-09 CA CA002341186A patent/CA2341186C/en not_active Expired - Fee Related
- 1999-06-09 AT AT99929157T patent/ATE238104T1/de not_active IP Right Cessation
- 1999-06-09 ES ES99929157T patent/ES2194475T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0010722A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19838278A1 (de) | 2000-02-24 |
CA2341186A1 (en) | 2000-03-02 |
WO2000010722A1 (de) | 2000-03-02 |
CA2341186C (en) | 2005-05-03 |
US6562138B1 (en) | 2003-05-13 |
ES2194475T3 (es) | 2003-11-16 |
ATE238104T1 (de) | 2003-05-15 |
EP1105220B1 (de) | 2003-04-23 |
DE59905216D1 (de) | 2003-05-28 |
JP2002523212A (ja) | 2002-07-30 |
JP4369058B2 (ja) | 2009-11-18 |
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