EP1105220B1 - Porte-electrode pour pistolet d'application de poudre - Google Patents

Porte-electrode pour pistolet d'application de poudre Download PDF

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Publication number
EP1105220B1
EP1105220B1 EP99929157A EP99929157A EP1105220B1 EP 1105220 B1 EP1105220 B1 EP 1105220B1 EP 99929157 A EP99929157 A EP 99929157A EP 99929157 A EP99929157 A EP 99929157A EP 1105220 B1 EP1105220 B1 EP 1105220B1
Authority
EP
European Patent Office
Prior art keywords
spray coating
coating device
electrode holder
electrode
powder
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
EP99929157A
Other languages
German (de)
English (en)
Other versions
EP1105220A1 (fr
Inventor
Gerald Haas
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.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7878450&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1105220(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Priority to DE29924481U priority Critical patent/DE29924481U1/de
Publication of EP1105220A1 publication Critical patent/EP1105220A1/fr
Application granted granted Critical
Publication of EP1105220B1 publication Critical patent/EP1105220B1/fr
Anticipated expiration legal-status Critical
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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
    • B05B5/03—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 kind is made GB 2 209 729 A is known.
  • Another Spray coating device of this kind is made of EP 0 383 030 B1. It contains one Electrode holder with one only about three millimeters long centering ring, which for centering the Electrode holder from the front to the downstream end a powder channel of the spray coating device is used.
  • the High voltage path from a high voltage generator to at least one high voltage electrode of the Powder well be shielded so that one electrostatic charging of the coating powder only from the electrode.
  • leakage currents between the high voltage conduction path and others Parts, such as the powder channel undesirable, because they mean a loss of energy and as well an unwanted electrostatic charge the Powder particles in the powder channel may result which in turn leads to powder deposits in the Pulverkanal and in special cases to a "hiking" lead powder dust along the Kriechstromweges can.
  • the greater the material thickness of electrical insulating material between the high voltage line parts and the powder channel is the better is the electrical insulation.
  • One such Enlargement of the material thickness is the wish contrary, the spray coater as possible small and with low weight.
  • the object of the invention is to be achieved electrical leakage currents and unwanted electromagnetic fields between high voltage conductors and coating powder in the powder channel of To avoid spray coating device without it becomes necessary, the spray coater bigger and / or harder to train.
  • the spray coating device shown in FIG according to the invention includes a one-piece housing. 2 made of electrically insulating material, which has a Handle 4 and a run 6 forms. Through the housing 2 extends a powder channel 8, which by a Handle tube piece 10 and a barrel tube piece 12 formed which is at an angle of less than 180 ° according to the angle between the handle 4 and the Run 6 are connected to each other. To the powder channel 8 is a powder hose 14 for the supply of Coating powder can be connected.
  • a housed in a chamber of the housing 2 High voltage generator 16 for generating a High voltage in the range between 10 kV and 140 kV or another voltage value is on its primary side with a fastened to the housing 2 Low voltage cable 18 and on its secondary side via an electrical conductor 20 with a High voltage electrode 22 electrically connected.
  • An electrode holder 24 forms a downstream End section of the powder channel 8.
  • the electrode holder 24 has a pipe section 26, which in the housing. 2 is inserted from the front and flush with the Inner diameter of the barrel pipe section 12 subsequent Inside diameter has.
  • the pipe piece 26 is a one-piece body of electrically insulating Material and has a rear, upstream Pipe section 28 whose outer diameter is smaller is as a forward adjoining Pipe section 30. Between the two Pipe sections 28 and 30 is a radial shoulder 32 formed.
  • An electrical contact device 34 is at this Paragraph 32 arranged. It contains one with the High voltage conductor 20 connected electrical contact 36 and one contacted by this, at the paragraph 32nd Arranged contact 38. This electrical contact 38 is by a through the pipe section 26 extending electrical connection line 40 with the at least an electrode 22 connected.
  • the axial distance between the electrical Contact device 34 and the rear end 42 of the rear pipe section 28 is at least 1.5 cm, preferably at most 4 cm, and is according to preferred embodiment between 2.0 and 3.0 cm, consequently, preferably at about 2.5 cm.
  • the tip of the electrode 22 protrudes a few millimeters out the air duct 48 and is upstream near a spray nozzle opening 52.
  • the Electrode 22 containing end portion of the air channel 48th is through a pipe section 54 of the electrode holder 24th formed, which extends from a web 56 axially to extends in front.
  • the web 56 extends diametrically through the pipe section 26, which in the housing 2 of is inserted in the front.
  • Electrode holder 24 All parts of the electrode holder 24 are made together from a one-piece body of electric insulating material, eg. B. plastic.
  • an exchangeable body which is between one Nozzle body 58 of the spray nozzle opening 52 and the housing 2 is arranged interchangeably.
  • To exchange the Electrode holder 24 only needs one Union nut 60 from the front end of the barrel 6 be removed so that the nozzle body 58 the Electrode holder 24 releases.
  • Pipe section 30 From the larger in outside diameter front Pipe section 30 extends with it one-piece pipe socket 62 forward, in which the Nozzle body 58 is inserted from the front.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Claims (7)

  1. Appareil de revêtement par projection de poudre, comportant un canal de poudre (8); un porte-électrode (24) qui est placé dans la partie d'extrémité aval du canal de poudre et présente un bout de tube d'une seule pièce (26) en matière isolante qui forme une partie du canal de poudre, la partie arrière amont (28) du bout de tube ayant un plus petit diamètre extérieur qu'une partie (30) de celui-ci qui se joint à la précédente vers l'avant ; un dispositif de contact électrique (34/38) pour la mise en contact d'un conducteur à haute tension (20) avec une ligne électrique de connexion (40) qui s'étend par le porte-électrode (24) jusqu'à au moins une électrode à haute tension (22) portée par celui-ci, le dispositif de contact (34/38) étant placé sur un talon dirigé vers l'arrière (32) entre les deux parties (28, 30) du bout de tube ; caractérisé par le fait que la distance axiale entre le dispositif de contact électrique (34/38) et l'extrémité arrière du la partie arrière (28) du bout de tube est d'au moins 1,5 cm et que dans la talon dirigé vers l'arrière (32) est formée une rainure (44) qui entoure annulairement avec distance radiale le canal de poudre (8) et d'une part est reliée à un canal d'air comprimé (46) et d'autre part communique avec un canal d'air (48) qui s'étend à travers le porte-électrode (24) et par lequel de l'air comprimé peut être apporté à l'électrode ou aux électrodes (22).
  2. Appareil de revêtement par projection selon la revendication 1, caractérisé par le fait que la distance est au maximum de 4 cm.
  3. Appareil de revêtement par projection selon la revendication 1, caractérisé par le fait que la distance est comprise entre 2 cm et 3 cm.
  4. Appareil de revêtement par projection selon l'une des revendications précédentes, caractérisé par le fait que de la partie de plus grand diamètre extérieur (30) du bout de tube fait saillie vers l'avant une tubulure (62) d'une seule pièce avec ladite partie.
  5. Appareil de revêtement par projection selon la revendication 4, caractérisé par le fait que dans la tubulure (62) est engagée la partie arrière d'une buse de projection (58).
  6. Appareil de revêtement par projection selon l'une des revendications précédentes, caractérisé par le fait que dans le bout de tube (26) s'étend une nervure (56) d'une seule pièce avec celui-ci d'où fait saillie vers l'avant au centre du canal de poudre un bout de tube (54) qui porte au moins une électrode (22).
  7. Appareil de revêtement par projection selon l'une des revendications précédentes, caractérisé par le fait que le porte-électrode (24) est engagé de l'avant, de manière remplaçable, dans un corps (2) dans lequel est formé le canal de poudre (8).
EP99929157A 1998-08-22 1999-06-09 Porte-electrode pour pistolet d'application de poudre Expired - Lifetime EP1105220B1 (fr)

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 (fr) 1998-08-22 1999-06-09 Porte-electrode pour pistolet d'application de poudre

Publications (2)

Publication Number Publication Date
EP1105220A1 EP1105220A1 (fr) 2001-06-13
EP1105220B1 true EP1105220B1 (fr) 2003-04-23

Family

ID=7878450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99929157A Expired - Lifetime EP1105220B1 (fr) 1998-08-22 1999-06-09 Porte-electrode pour pistolet d'application de poudre

Country Status (8)

Country Link
US (1) US6562138B1 (fr)
EP (1) EP1105220B1 (fr)
JP (1) JP4369058B2 (fr)
AT (1) ATE238104T1 (fr)
CA (1) CA2341186C (fr)
DE (2) DE19838278A1 (fr)
ES (1) ES2194475T3 (fr)
WO (1) WO2000010722A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7992515B2 (en) 2005-08-12 2011-08-09 J. Wagner Ag Electrode holder for a powder spraying device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005017931A1 (de) * 2005-04-18 2006-10-19 Itw Gema Ag Pulversprühbeschichtungspistole und Pistolengehäuse hierzu
EP2050506A1 (fr) * 2007-10-19 2009-04-22 Boxal Netherlands B.V. Appareil de revêtement en poudre par pulvérisation
WO2013154696A1 (fr) * 2012-04-12 2013-10-17 Nordson Corporation Pistolet de pulvérisation de poudre comprenant un support d'électrode résistant à l'usure
USD1060607S1 (en) * 2022-08-25 2025-02-04 Sistem Teknik Makina Sanayi Ve Ticaret Anonim Sirketi Paint spray gun

Family Cites Families (4)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7992515B2 (en) 2005-08-12 2011-08-09 J. Wagner Ag Electrode holder for a powder spraying device

Also Published As

Publication number Publication date
ES2194475T3 (es) 2003-11-16
JP2002523212A (ja) 2002-07-30
ATE238104T1 (de) 2003-05-15
DE59905216D1 (de) 2003-05-28
WO2000010722A1 (fr) 2000-03-02
US6562138B1 (en) 2003-05-13
DE19838278A1 (de) 2000-02-24
CA2341186C (fr) 2005-05-03
EP1105220A1 (fr) 2001-06-13
JP4369058B2 (ja) 2009-11-18
CA2341186A1 (fr) 2000-03-02

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