EP0236794B1 - Appareil de pulvérisation électrostatique pour poudre de revêtement - Google Patents

Appareil de pulvérisation électrostatique pour poudre de revêtement Download PDF

Info

Publication number
EP0236794B1
EP0236794B1 EP87102178A EP87102178A EP0236794B1 EP 0236794 B1 EP0236794 B1 EP 0236794B1 EP 87102178 A EP87102178 A EP 87102178A EP 87102178 A EP87102178 A EP 87102178A EP 0236794 B1 EP0236794 B1 EP 0236794B1
Authority
EP
European Patent Office
Prior art keywords
powder
conduit
gas
spray
gas outlet
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
EP87102178A
Other languages
German (de)
English (en)
Other versions
EP0236794A3 (en
EP0236794A2 (fr
Inventor
Karl Buschor
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=25841927&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0236794(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19863608415 external-priority patent/DE3608415A1/de
Priority claimed from DE19863608426 external-priority patent/DE3608426C3/de
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Priority to AT87102178T priority Critical patent/ATE59584T1/de
Publication of EP0236794A2 publication Critical patent/EP0236794A2/fr
Publication of EP0236794A3 publication Critical patent/EP0236794A3/de
Application granted granted Critical
Publication of EP0236794B1 publication Critical patent/EP0236794B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B05B5/03—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

Definitions

  • the invention relates to an electrostatic spray device for coating powder, with a powder channel and a spray opening at its downstream end, with a powder deflection device downstream after the spray opening in the radial center of the powder flow for generating a gas wall transverse to the powder flow, with an axially through a Channel section of the powder channel and through the spray opening in the powder channel axis first carrier, which carries the powder deflecting device and which has a gas channel supplying the powder deflecting gas and at least one electrode for electrostatically charging the coating powder within the powder channel.
  • the invention relates to an electrostatic spray device for coating powder, with a powder channel and a spray opening at its downstream end, with a powder deflection device downstream after the spray opening in the radial center of the powder flow for generating a powder cloud, with an axially through a channel section of the powder channel and through the spray opening in the powder channel axis, the carrier which carries the powder deflection device and is provided with a gas channel and with at least one electrode for electrostatically charging the coating powder within the powder channel.
  • Such electrostatic spray devices are known from Japanese patent application 54-80 06 with publication number 55-99 361 (A) and their excerpt publication in "Patents abstracts of Japan", October 29, 1980, Vol. 4, No. 155.
  • Their powder deflection device consists of a section of the carrier which is thicker in the form of drops, and openings formed therein, which are arranged in a star shape, but inclined forward in the flow direction of the powder stream, and produce a gas wall transversely to the powder stream, in order thereby to convert the powder stream into a powder cloud.
  • an electrostatic spray device with an axially arranged in the powder channel support for a pneumatic powder deflection device downstream of the spray opening is known, in which an annular electrode upstream of the spray opening along a short channel section forms the outer jacket wall of the powder channel. It is also known from US Pat. No. 4,289,278 to arrange an electrode axially in the powder channel upstream of its spray opening in its radial center and to flush it with gas so that no powder particles can attach to the electrode. The electrode can be arranged directly in the powder stream or in a gas channel opening into this.
  • DE-PS 25 39 627 corresponds essentially to US Pat. No. 3,940,061 and shows an air-flushed electrode in the center of a spray opening of an electrostatic spray device.
  • the object of the invention is to improve the coating quality and economy of the coating method with such a spray device. Furthermore, powder losses on the way from the spray device to the object to be coated are to be reduced. In addition, the spray device is said to be able to apply a thicker layer of powder to the object to be coated by a single spraying process.
  • the carrier is provided with at least one gas outlet opening connecting the gas channel to the powder channel, that at least one of the electrodes is arranged in the gas outlet opening in such a way that from the gas channel through the gas outlet opening into the powder channel flowing gas flows along the electrode and thereby injects electrical charges from the electrode into the coating powder, that the distance of the radial center of the gas outlet opening in the lateral surface of the carrier, and the distance of the downstream end of the electrode, each from a transverse plane at the downstream end of the spray opening is between 12 mm and 16 mm, preferably 14 mm.
  • the powder deflection device has a baffle body, that the carrier is provided with at least one gas outlet opening connecting the gas channel to the powder channel, that at least one of the electrodes is arranged in the gas outlet opening in such a way that the Gas channel flows through the gas outlet opening into the powder channel along the electrode and thereby injects electrical charges from the electrode into the coating powder, that the distance of the radial center of the gas outlet opening in the lateral surface of the carrier, and the distance of the downstream end of the electrode, each from a transverse plane of the spray opening at its downstream end is approximately half as large as the outer diameter of the powder channel, which is annular in cross section, in its channel section between the gas outlet opening and the spray opening.
  • the electrostatic spray device has a tubular base body 2, which consists of 3 individual parts 4, 6 and 8 arranged coaxially one inside the other.
  • a powder channel 14 extends axially through the innermost part 8, the downstream end of which is provided with a spray opening 18.
  • a device 22 with a rod-shaped carrier 25 which extends axially along the channel axis 20 of the powder channel 14 and gives it an annular cross-sectional shape along the carrier 25, while the powder channel 14 upstream of the device 22 has a hollow cylindrical section 72.
  • a gas channel 24 extends through the Carrier 25 along the channel axis 20. The gas channel 24 is connected to a gas connection 28.
  • an electrical line 48 which is connected to an electrical high-voltage source which, as is known, can either be arranged in the base body 2 or can be arranged externally.
  • the channel section 68 which is annular in cross section, is delimited on the outside by a cylindrical wall 62 and on the inside by a cylindrical jacket surface 70 of the rod-shaped carrier 25.
  • the gas channel 24 opens via two gas outlet openings 80, which are formed in the carrier 25, into the section 68 of the powder channel 14 which is annular in cross section.
  • These gas outlet openings 80 are formed by bores which do not run radially but at an angle to the powder flow direction in accordance with the drawings, so that they are inclined towards the spray opening 18. They are evenly distributed around the circumference of the carrier 25.
  • an electrode 82 In each gas outlet opening 80 there is an electrode 82, each of which is connected to the electrical line 48.
  • the electrode ends 84 preferably end approximately in the lateral surface 70.
  • the electrode ends 84 can also end, for example, 0.1 to 3.0 mm in front of the lateral surface 70, or protrude slightly therefrom. In the latter case, a stronger gas flow is required to keep the electrode ends clean.
  • the diameter of the gas outlet openings 80 is only slightly larger than the diameter of the electrodes 82. Instead of two, only one gas outlet opening 80 could be provided, but two or more gas outlet openings 80 with at least one electrode 82 each result in better electrostatic effects. Since the electrodes 82 are accommodated in the gas outlet openings 80 and are surrounded by the gas of the gas channel 24, no powder can be deposited on these electrodes, even if only a little gas or gas is present via the gas channel 24 relatively low pressure is supplied.
  • the carrier 25 is provided outside the spray opening 18 with a powder deflection device for essentially radially deflecting the powder emerging from the spray opening 18.
  • This powder deflection device 102 has an annular transverse gas opening 104 opening out transversely to the longitudinal direction of the powder channel 14 for generating a gas wall 106 transverse to the longitudinal direction 20 of the powder channel 14.
  • a plurality of essentially radially opening outlets can also be used to produce a circular disk-shaped opening
  • Gas wall 106 may be provided across the powder channel 14.
  • the gas channel 24 supplies the transverse gas opening 104 with gas, preferably air, via radial bores 108 and an adjoining ring channel 110.
  • the transverse gas opening 104 is formed by an annular gap between the end face 112 of the carrier 25 and a cap 114 inserted into the end face of the carrier.
  • the carrier 25 has a constant diameter over its entire length up to the cap 114, which is the same size as the diameter of the cap 114. In deviation from this, the carrier 25 and the cap 114 could have different diameters.
  • the distance 116 between the electrode ends 84, and thus also the radial center of the gas outlet openings 80 in the lateral surface 70, from the downstream end 118 of the spray opening 18 is essentially the same size as the outer diameter 117 of the powder channel 14 immediately upstream of the spray opening 18. Regardless of the diameter 117 of the powder channel 14, the distance 116 is preferably approximately 12 mm to 16 mm. The preferred value is 14 mm.
  • the powder channel section 119 then acts as a stowage area when the pneumatically conveyed powder is stowed through the gas wall 106 and is thereby compressed in the powder channel section 119.
  • the gas flow of the gas wall 106 is so slow that it cannot exert any suction on the powder flow in the spray opening 18.
  • the powder channel section 119 acts as a suction area when the powder is "sucked out” by the gas of the gas wall 106 by means of an injector-like suction effect from the powder channel section 119 through the spray opening 18. This is the case if the flow velocity of the gas of the gas wall 106 is greater than the flow velocity of the powder in the powder channel section 119.
  • the gas wall 106 acts as an “impact body”, by means of which the powder flow is driven apart radially and converted into a powder cloud.
  • the gas of the gas channel 24 receives electrical charges from the electrodes 82 and injects these electric charges in the powder channel section 119 through the entire channel cross section into the powder stream.
  • the gas flow from the gas wall 106 displaces and swirls the radially inner powder particles with respect to the radially outer powder particles, as a result of which the more highly charged powder particles release electrical charges to the less charged powder particles and "suck up" further electrical charge units from the electrodes 82.
  • All parts of the spray device which are touched by the powder are preferably made of plastic.
  • the electrostatic spray devices according to the invention shown in FIGS. 2 and 3 have a tubular base body 2, which consists of three individual parts 4, 6 and 8 arranged axially one inside the other.
  • a powder channel 14 extends axially through the innermost part 8, the downstream end of which is provided with a spray opening 18.
  • a device 22 which runs axially to the channel axis 20 and which forms a gas channel 24 which extends along the channel axis 20.
  • the gas channel 24 stands with one Gas connection 28 in connection.
  • an electrical line 48 which is connected to an electrical high-voltage source which, as is known, can either be arranged in the base body 2 or can be arranged externally.
  • the device 22 is provided with a rod-shaped carrier 25 which extends axially along the channel axis 20 of the powder channel 14 and gives it an annular cross-sectional shape along the carrier 25, while the powder channel 24 has a hollow cylindrical section 72 upstream of the device 22.
  • the channel section 68 which is annular in cross section, is delimited on the outside by a cylindrical channel wall 62 and on the inside by a cylindrical jacket surface 70 of the rod-shaped carrier 25.
  • the gas channel 24 opens out via two gas outlet openings 80, which are formed in the carrier 25, into the section 68 of the powder channel 14, which section has an annular cross section.
  • These gas outlet openings 80 are formed by bores which do not run radially but at an angle to the powder flow direction according to the drawings. They are evenly distributed around the circumference of the carrier 25.
  • the electrode ends 84 end approximately in the lateral surface 70. They preferably do not extend to the lateral surface 70, but end short, approximately 1 mm beforehand, so that no powder particles can adhere to them.
  • the diameter of the gas outlet openings 80 is only slightly larger than the diameter of the electrodes 82. Instead of two, only one gas outlet opening 80 could be provided, but two or more gas outlet openings, each with at least one electrode, give better electrostatic effects.
  • the carrier 25 is outside the spray opening 18 with a Flow deflection device is provided for essentially radial deflection of the powder emerging from the spray opening 18.
  • the carrier 25 is provided downstream of the spray opening 18 with a baffle 120, which creates a blocking effect in the section 119 of the powder channel 14 between the gas outlet openings 80 and the spray opening 18.
  • the impact body 120 is provided on its front side facing away from the spray opening 18 with a cross-air opening 124, which is supplied with gas from the powder channel 24 via radial bores 128 and an adjoining annular channel section 130, and this essentially radially via the front end face 132 of the impact body 120 conducts to prevent powder from adhering to this end face 132.
  • the transverse air opening 124 is annular in accordance with FIG. 2, the ring radius of this opening 124 being made as small as is technically possible.
  • Electrodes 84 are located in the gas outlet openings 80; on the other hand, the distance between the electrode ends 84 and thus also the distance between the radial center of the gas outlet openings 80 and the downstream end 118 of the spray opening 18 is important, this distance 126 preferably being approximately the same size as the radius of the outer diameter 117 of the powder channel 14 in the powder channel section 119 directly upstream of spray opening 18.
  • the embodiment according to FIG. 3 is identical to the embodiment from FIG. 2, with the embodiment according to FIG. 3 additionally in the radial center of the impact body 120 an axially opening gas outlet opening 134 is formed, which is connected to the gas channel 24 and in which there is a further electrode 136 around which the gas flows for electrostatic charging of the powder.
  • the further electrode 136 is also connected to the electrical line 48 via an extension wire 138.
  • the end of the connecting wire 138 serves as the electrode 136.
  • the impact body forms a flow congestion area in the powder channel immediately upstream of the spray opening, in which the powder is compressed. Since the electrode is located in the gas outlet opening and its gas flows around and around it, no powder particles can adhere to it.
  • the electric field lines emanating from the electrode run along ideal trajectories of the powder particles from the electrode to the object to be coated, essentially without electrical stray field lines. The avoidance of stray field lines leads to a stronger charge of the powder particles with the same electrical energy, so that these are better attracted to the object to be coated and adhere better to it.
  • the gas transfers the electrical charge of the electrode into the compacted powder.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Claims (10)

1. Dispositif de pulvérisation électrostatique pour poudre de revêtement, comprenant un canal de poudre (14) et un orifice de pulvérisation (18) à son extrémité aval, comprenant un dispositif de déviation de la poudre (104, 106, 108, 112) en aval de l'orifice de pulvérisation (18) dans le centre du courant de poudre dans le sens radial pour engendrer une paroi gazeuse (106) transversalement par rapport au courant de poudre, et comprenant un support (25) qui s'étend axialement dans l'axe (20) du canal de poudre à travers une portion de canal (68, 119) du canal de poudre (14) et à travers l'orifice de pulvérisation (18), qui porte le dispositif de déviation de la poudre (104, 106, 108, 112) et qui comporte un canal de gaz (24) alimentant en gaz le dispositif de déviation de la poudre, ainsi qu'au moins une électrode (82) à l'intérieur du canal de poudre (14) pour charger la poudre de revêtement d'électricité statique, caractérisé par le fait que le support (25) est muni d'au moins un orifice de sortie du gaz (80) reliant le canal de gaz (24) au canal de poudre (14), par le fait qu'au moins l'une des électrodes (82) est disposée dans l'orifice de sortie du gaz (80) de telle manière que du gaz en écoulement depuis le canal de gaz (24) vers le canal de poudre (14) à travers l'orifice de sortie du gaz (80) s'écoule le long de l'électrode (82) en injectant dans la poudre de revêtement des charges électriques provenant de l'électrode, et par le fait que la distance (116) du centre de l'orifice de sortie du gaz (80) dans le sens radial dans la surface latérale (70) du support (25), et la distance de l'extrémité aval (84) de l'électrode (82), par rapport à chaque fois à un plan transversal situé à l'extrémité aval (118) de l'orifice de pulvérisation (18), est comprise entre 12 mm et 16 mm et s'élève de préférence à 14 mm.
2. Dispositif de pulvérisation selon la revendication 1, caractérisé par le fait que l'extrémité (84) de l'électrode (82) qui est en aval par rapport au courant de gaz est située dans la zone comprise entre l'extrémité aval de l'orifice de sortie du gaz (80) et 3 mm en amont de celle-ci.
3. Dispositif de pulvérisation selon la revendication 1, caractérisé par le fait que l'extrémité (84) de l'électrode (82) qui est en aval par rapport au courant de gaz est située à peu près à l'extrémité aval de l'orifice de sortie du gaz (80) dans la surface latérale (70) du support (25).
4. Dispositif de pulvérisation selon l'une des revendi­cations 1 à 3, caractérisé par le fait que l'orifice de sortie du gaz (80) est dirigé obliquement par rapport à la direction radiale du canal de poudre (14) dans la direction d'écoulement de la poudre de revêtement en étant incliné dans le canal de poudre (14).
5. Dispositif de pulvérisation électrostatique pour poudre de revêtement, comprenant un canal de poudre (14) et un orifice de pulvérisation (18) à son extrémité aval, comprenant un dispositif de déviation de la poudre (120) en aval de l'orifice de pulvérisation (18) dans le centre du courant de poudre dans le sens radial pour engendrer un nuage de poudre, et comprenant un support (25) qui s'étend axialement dans l'axe (20) du canal de poudre à travers une portion de canal (119) du canal de poudre (14) et à travers l'orifice de pulvérisation (18), qui porte le dispositif de déviation de la poudre (120) et qui est muni d'un canal de gaz (24), ainsi que d'au moins une électrode (82) pour charger la poudre de revêtement d'électricité statique à l'intérieur du canal de poudre (14), caractérisé par le fait que le dispositif de déviation de la poudre comporte un corps d'impact (120), par le fait que le support (25) est muni d'au moins un orifice de sortie du gaz (80) reliant le canal de gaz (24) au canal de poudre (14), par le fait qu'au moins l'une des électrodes (82) est disposée dans l'orifice de sortie du gaz (80) de telle manière que du gaz en écoulement depuis le canal de gaz (24) vers le canal de poudre (14) à travers l'orifice de sortie du gaz (80) s'écoule le long de l'électrode (82) en injectant dans la poudre de revêtement des charges électriques provenant de l'électrode (82), et par le fait que la distance (126) du centre de l'orifice de sortie du gaz (80) dans le sens radial dans la surface latérale (70) du support (25), et la distance de l'extrémité aval (84) de l'électrode (82), par rapport à chaque fois à un plan transversal de l'orifice de pulvérisation (18) à son extrémité aval (118), est à peu près la moitié du diamètre extérieur (117) du canal de poudre (14), annulaire en section transversale, dans sa portion de canal (119) située entre l'orifice de sortie du gaz (80) et l'orifice de pulvérisation (18).
6. Dispositif de pulvérisation selon la revendication 5, caractérisé par le fait que l'extrémité (84) de l'électrode (82) se trouve à peu près dans le plan de la surface latérale (70) du support (25) ou jusqu'à 1 mm environ en amont dans l'orifice de sortie du gaz (80).
7. Dispositif de pulvérisation selon la revendication 5 ou 6, caractérisé par le fait que l'orifice de sortie du gaz (80) est dirigé obliquement par rapport à la direction radiale du canal de poudre (14) dans la direction d'écoule­ment de la poudre de revêtement en étant incliné dans le canal de poudre (14).
8. Dispositif de pulvérisation selon l'une des revendi­cations 5 à 7, caractérisé par le fait que, dans le centre (20) du corps d'impact (120) dans le sens radial, un orifice axial de sortie du gaz (134) débouche axialement vers l'avant sur le côté du corps d'impact (120) opposé à l'orifice de pulvérisation (18) en étant en liaison avec le canal de gaz (24), et par le fait qu'une autre électrode (136) est disposée dans cet orifice axial de sortie du gaz (134) pour charger la poudre d'électricité statique.
9. Dispositif de pulvérisation selon l'une des revendi­cations 5 à 8, caractérisé par le fait que le corps d'impact (120) comporte, sur son côté antérieur du corps (132) opposé à l'orifice de pulvérisation (18), au moins un orifice de sortie du gaz (124) qui débouche radialement pour l'essen­tiel, qui est situé pour l'essentiel au centre du corps d'impact dans le sens radial et qui est relié au canal de gaz (24).
10. Dispositif de pulvérisation selon l'une des revendi­cations 5 à 9, caractérisé par le fait que le support (25) comporte, régulièrement répartis sur sa périphérie, à l'intérieur du canal de poudre (14) et en amont de l'orifice de pulvérisation (18), au moins deux orifices de sortie du gaz (80) comprenant chacun au moins une électrode (82).
EP87102178A 1986-03-13 1987-02-16 Appareil de pulvérisation électrostatique pour poudre de revêtement Expired - Lifetime EP0236794B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87102178T ATE59584T1 (de) 1986-03-13 1987-02-16 Elektrostatische sprueheinrichtung fuer beschichtungspulver.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3608415 1986-03-13
DE3608426 1986-03-13
DE19863608415 DE3608415A1 (de) 1986-03-13 1986-03-13 Elektrostatische sprueheinrichtung fuer beschichtungspulver
DE19863608426 DE3608426C3 (de) 1986-03-13 1986-03-13 Elektrostatische Sprüheinrichtung für Beschichtungspulver

Publications (3)

Publication Number Publication Date
EP0236794A2 EP0236794A2 (fr) 1987-09-16
EP0236794A3 EP0236794A3 (en) 1988-08-31
EP0236794B1 true EP0236794B1 (fr) 1991-01-02

Family

ID=25841927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102178A Expired - Lifetime EP0236794B1 (fr) 1986-03-13 1987-02-16 Appareil de pulvérisation électrostatique pour poudre de revêtement

Country Status (4)

Country Link
US (1) US4788933A (fr)
EP (1) EP0236794B1 (fr)
JP (1) JPH0673644B2 (fr)
ES (1) ES2019888B3 (fr)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8915968U1 (de) * 1989-08-11 1992-12-17 Gema Volstatic Ag, St. Gallen Elektrostatische Pulverbeschichtungseinrichtung
DE4141663C2 (de) * 1991-12-17 1996-09-19 Wagner Int Elektrostatische Pulver-Beschichtungspistole
US5344082A (en) * 1992-10-05 1994-09-06 Nordson Corporation Tribo-electric powder spray gun
US5711489A (en) * 1994-08-18 1998-01-27 Nihon Parkerizing Co., Ltd. Electrostatic powder coating method and apparatus
AU5782896A (en) * 1996-04-04 1997-10-29 Nordson Corporation Tribo-electric powder spray coating using conical spray
EP0912292B1 (fr) * 1996-05-03 2001-12-12 Minnesota Mining And Manufacturing Company Procédé de fabrication d'articles abrasifs
JP4150078B2 (ja) * 1996-05-03 2008-09-17 スリーエム カンパニー 多孔質研磨用製品の製造方法
DE69627538T2 (de) * 1996-05-03 2004-04-08 Minnesota Mining And Manufacturing Company, St. Paul Nichtgewebte schleifmittel
US6328224B1 (en) 1997-02-05 2001-12-11 Illinois Tool Works Inc. Replaceable liner for powder coating apparatus
US5853126A (en) * 1997-02-05 1998-12-29 Illinois Tool Works, Inc. Quick disconnect for powder coating apparatus
EP0857515A3 (fr) 1997-02-05 1998-09-16 Illinois Tool Works Inc. Echappement de l'air de la turbine d'un appareil de revêtement à poudre
US5850976A (en) * 1997-10-23 1998-12-22 The Eastwood Company Powder coating application gun and method for using the same
DE10053292C1 (de) * 2000-10-27 2002-05-23 Eisenmann Lacktechnik Kg Hochrotationszerstäuber zur Aufbringung von Pulverlack
US6889921B2 (en) * 2002-09-30 2005-05-10 Illinois Tool Works Inc. Bell cup skirt
US20040256811A1 (en) * 2002-11-22 2004-12-23 Proper George N. Seal for high-pressure pumping system
ITRE20030019A1 (it) 2003-02-19 2004-08-20 Annovi Reverberi Spa "pompa ad alta pressione a pistoni tuffanti"
US7128277B2 (en) * 2003-07-29 2006-10-31 Illinois Tool Works Inc. Powder bell with secondary charging electrode
US20050023385A1 (en) * 2003-07-29 2005-02-03 Kui-Chiu Kwok Powder robot gun
US20050056212A1 (en) * 2003-09-15 2005-03-17 Schaupp John F. Split shroud for coating dispensing equipment
US7762481B2 (en) * 2003-11-06 2010-07-27 Fanuc Robotics America, Inc. Electrostatic rotary atomizer with indirect internal charge
US20050173556A1 (en) * 2004-02-09 2005-08-11 Kui-Chiu Kwok Coating dispensing nozzle
GB0625583D0 (en) * 2006-12-21 2007-01-31 Itw Ltd Paint spray apparatus
US8371517B2 (en) * 2007-06-29 2013-02-12 Illinois Tool Works Inc. Powder gun deflector
US20090020626A1 (en) * 2007-07-16 2009-01-22 Illinois Tool Works Inc. Shaping air and bell cup combination
US8096264B2 (en) * 2007-11-30 2012-01-17 Illinois Tool Works Inc. Repulsion ring
US10155233B2 (en) * 2008-04-09 2018-12-18 Carlisle Fluid Technologies, Inc. Splash plate retention method and apparatus
DE102011004352B4 (de) 2011-02-18 2014-05-15 Gema Switzerland Gmbh Vorrichtung zum pneumatischen Fördern von Pulver
JP6242854B2 (ja) 2012-04-12 2017-12-06 ノードソン コーポレーションＮｏｒｄｓｏｎ Ｃｏｒｐｏｒａｔｉｏｎ 耐摩耗性電極支持体を備える粉体スプレーガン
DE102012210439B4 (de) 2012-06-20 2019-03-14 Gema Switzerland Gmbh Vorrichtung zum Fördern von Beschichtungspulver aus einem Pulverbehälter und Verfahren zum Reinigen einer Pulverfördervorrichtung
US9375734B1 (en) * 2015-06-16 2016-06-28 Efc Systems, Inc. Coating apparatus turbine having internally routed shaping air
EP3892384A1 (fr) * 2020-04-07 2021-10-13 Rolf Schlicht GmbH Dispositif de distribution

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326182A (en) * 1963-06-13 1967-06-20 Inoue Kiyoshi Electrostatic spray device and method
CH622972A5 (en) * 1977-09-09 1981-05-15 Gema Ag Device for electrostatic powder coating of objects
JPS5532433A (en) * 1978-08-25 1980-03-07 Toshiba Corp System for controlling inverter
JPS5534159A (en) * 1978-09-01 1980-03-10 Onoda Cement Co Ltd Powder charging device and electrostatic powder depositing device
JPS5599361A (en) * 1979-01-26 1980-07-29 Kansai Paint Co Ltd Hand spray electrostatic powder coating gun
US4341347A (en) * 1980-05-05 1982-07-27 S. C. Johnson & Son, Inc. Electrostatic spraying of liquids
GB2105616A (en) * 1981-09-08 1983-03-30 Volstatic Coatings Charging apparatus for an electrostatic gun
DE3412694A1 (de) * 1983-04-07 1984-10-11 Kopperschmidt-Mueller GmbH & Co KG, 7057 Winnenden Verfahren und vorrichtung zum elektrostatischen aufspruehen von pulverteilchen auf eine zu beschichtende oberflaeche
CA1254030A (fr) * 1985-04-18 1989-05-16 John Sharpless Outil pistoleur de particules

Also Published As

Publication number Publication date
JPS6323762A (ja) 1988-02-01
ES2019888B3 (es) 1991-07-16
EP0236794A3 (en) 1988-08-31
US4788933A (en) 1988-12-06
EP0236794A2 (fr) 1987-09-16
JPH0673644B2 (ja) 1994-09-21

Similar Documents

Publication Publication Date Title
EP0236794B1 (fr) Appareil de pulvérisation électrostatique pour poudre de revêtement
EP0236795B1 (fr) Appareil de pulvérisation électrostatique pour poudre de revêtement
DE69310026T2 (de) Vorrichtung zum elektrostatischen Sprühen von pulverformigen Stoffen mit einem rotierenden Ionisierungskopf
EP0779105B1 (fr) Dispositif de revêtement par pulvérisation pour le revêtement par pulvérisation electrostatique
DE3600808A1 (de) Elektrostatische pulverspruehvorrichtung mit triboelektrischer pulveraufladung
CH624316A5 (fr)
DE102009013979A1 (de) Elektrodenanordnung für einen elektrostatischen Zerstäuber
DD255482A5 (de) Vorrichtung zum elektrostatischen beschichten von gegenstaenden
DE2852038A1 (de) Fluessigkeitsspruehvorrichtung, insbesondere fluessigkeitsspritzpistole
EP1362640A1 (fr) Dispositif pulvérisateur pour le revêtement électrostatique de pièces en séries
EP0163118B1 (fr) Pistolet de pulvérisation pour le revêtement à poudre
EP1283074A2 (fr) Dispositif de pulvérisation de poudre
DE3718154A1 (de) Sprueheinheit mit einem rotationsspruehorgan
EP0941145B1 (fr) Dispositif de pulverisation pour poudrage
DE1475160B2 (de) Druckgaszerstäuber zum Versprühen von Flüssigkeiten
EP0723815B1 (fr) Dispositif de pulvérisation pour matériaux de revêtement
DE2065699C3 (de) Vorrichtung zum elektrostatischen Beschichten von Gegenständen mit pulverförmigem Beschichtungsmaterial
DE10319916A1 (de) Sprühgerät für Beschichtungsmaterial, insbesondere Beschichtungspulver
EP1201316B1 (fr) Pulvérisateur à vitesse de rotation élevée pour peinture en poudre
DE2514117B2 (de) Vorrichtung zum elektrostatischen Aufsprühen von Überzugsmassen
DE19546973A1 (de) Pulver-Sprühbeschichtungsvorrichtung
DE3608426C2 (fr)
EP0637466B1 (fr) Dispositif de projection électrostatique de produit en poudre
EP0171042A1 (fr) Dispositif pour l'enduction électrostatique d'articles
DE3644849A1 (de) Elektrostatische sprueheinrichtung fuer beschichtungspulver

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: 19870216

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT CH ES FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT CH ES FR GB IT LI

17Q First examination report despatched

Effective date: 19900223

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH ES FR GB IT LI

REF Corresponds to:

Ref document number: 59584

Country of ref document: AT

Date of ref document: 19910115

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: GEMA VOLSTATIC AG

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: WAGNER INTERNATIONAL AG

Effective date: 19910918

26 Opposition filed

Opponent name: WAGNER INTERNATIONAL AG

Effective date: 19910918

Opponent name: BOELLHOFF VERFAHRENSTECHNIK GMBH & CO. KG

Effective date: 19910930

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 19930212

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20060201

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20060217

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060223

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20060224

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20060227

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060228

Year of fee payment: 20

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 EXPIRATION OF PROTECTION

Effective date: 20070215

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 EXPIRATION OF PROTECTION

Effective date: 20070217

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070217