EP0252954A1 - Dispositif electrostatique de pulverisation a chargement tribo-electrique de la poudre. - Google Patents

Dispositif electrostatique de pulverisation a chargement tribo-electrique de la poudre.

Info

Publication number
EP0252954A1
EP0252954A1 EP87900639A EP87900639A EP0252954A1 EP 0252954 A1 EP0252954 A1 EP 0252954A1 EP 87900639 A EP87900639 A EP 87900639A EP 87900639 A EP87900639 A EP 87900639A EP 0252954 A1 EP0252954 A1 EP 0252954A1
Authority
EP
European Patent Office
Prior art keywords
powder
powder tube
particles
tube
electrodes
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
Application number
EP87900639A
Other languages
German (de)
English (en)
Other versions
EP0252954B1 (fr
Inventor
Gerhard Friedrich Vohringer
Kurt Pfeifer
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.)
Esb Elektrostatische Spruh- und Beschichtungsanlagen Gf Vohringer GmbH
ESB VOEHRINGER
Original Assignee
Esb Elektrostatische Spruh- und Beschichtungsanlagen Gf Vohringer GmbH
ESB VOEHRINGER
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
Application filed by Esb Elektrostatische Spruh- und Beschichtungsanlagen Gf Vohringer GmbH, ESB VOEHRINGER filed Critical Esb Elektrostatische Spruh- und Beschichtungsanlagen Gf Vohringer GmbH
Priority to AT87900639T priority Critical patent/ATE43517T1/de
Publication of EP0252954A1 publication Critical patent/EP0252954A1/fr
Application granted granted Critical
Publication of EP0252954B1 publication Critical patent/EP0252954B1/fr
Expired legal-status Critical Current

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
    • B05B5/047—Discharge apparatus, e.g. electrostatic spray guns using tribo-charging

Definitions

  • the invention relates to an electrostatic powder spraying device with triboelectric powder charging by means of a powder tube enclosing a conveying channel for the spray powder and at least one displacement body arranged in the flow channel to increase the flow velocity, the powder tube being grounded on the outside and having a triboelectric material in at least on its inside the frictional electrical voltage series is arranged at a distance from the material of the powder particles to be sprayed.
  • a comparable powder spraying device is known from DE-A-29 38 8 ⁇ , according to which the powder is charged in a tubular nozzle body, the flow channel of which is narrowed by a guide body in order to increase the speed and thereby generate a flow vortex.
  • the outside of the nozzle is grounded or connected to high voltage in order to separate the opposite charges of particles on contact with the wall of the nozzle lined with triboelectric material or a displacement body. This is intended to improve the charging of the particles, but a separate electric field is used between the nozzle and the workpiece to guide the charged particles to the material.
  • the electrostatic field peaks, Edges and other protrusions of the workpiece form neutral zones on the workpiece.
  • the coating powder can therefore only penetrate into corners and cracks of the workpiece to an insufficient extent. The coating therefore becomes uneven, which is a major reason why surface damage such as rust stains or the like occurs early on the coated workpiece.
  • the invention is based on the electrostatic powder spraying device defined at the outset and pursues the task of designing this device in the simplest possible manner in such a way that the precipitation of the coating powder is evened out on workpieces of complex design and the precipitation efficiency is increased.
  • a reloading device for the triboelectrically charged powder particles with the same polarity adopted in the frictional charging is used to achieve this object.
  • the charging voltage of the powder particles can be increased to such an extent that these particles find their way to the workpiece without an electrostatic guiding field established between the spraying device and the workpiece and largely independently of other directional forces such as gas pressure flow forces and the like.
  • the powder particles can penetrate to the bottom of even complicated recesses on the workpiece, even the coating over the entire surface and improve protection against damage or destruction from the outside.
  • the recharging should primarily be carried out by electrodes fed from an electrical high-voltage line, such as radially inwardly protruding wire electrodes. However, it may be appropriate to carry out a further recharge shortly before the powder emerges from the nozzle, which under certain circumstances can again take place triboelectrically.
  • FIG. 1 shows a partial longitudinal section through an electrostatic powder spraying device according to the invention, which is shown schematically in the rest,
  • FIG. 3 shows a partially sectioned side view of a powder spray gun designed according to the invention
  • the supporting part of the device shown in FIGS. 1 and 2 is a powder tube (1), to which a flow conveying gas with a large number of powder particles evenly distributed therein is supplied from the supply end (2) according to arrow (3), which according to FIG .l are shown as positive charge carriers (4) and the powder tube (1) at its outlet end Leave (5) again in order to be guided to a workpiece that is connected to earth potential, in particular by means of electrostatic * charge forces.
  • This discharge body (7) is connected to a ground connection (9) by a line (ö).
  • the discharge body (7) expediently consists of highly conductive metal such as copper or brass
  • the powder tube (1) is expediently formed by an insulator, in particular an insulating plastic.
  • Polytetrafluoroethylene (PTFE) is preferred.
  • PTFE polytetrafluoroethylene
  • a particular advantage of this material is the great difference between its electricity constants and those of the most commonly used coating powders, especially epoxy resin.
  • a recharging device (42) which is arranged close to the outlet end (5), is used, for example, with two recharging electrodes (13) designed as wire electrodes, which protrude approximately radially into the conveying channel defined by the inner surface (11) and through a high-impedance protective resistor (15) is connected to a high-voltage supply (17).
  • the friction charge is reinforced by two displacement bodies (21) and (22), which, like the powder tube (1), are made of PTFE and bear against the inside (11) of the powder tube with slight pressure.
  • Both displacement bodies each have a core (23) with a square cross-section, which carries guide ribs (24) arranged on the outside in a cross shape, which run parallel to the pipe axis (16) with the same circumferential pitch and are provided with wedge-shaped bevels (25) at the ends of the displacement bodies.
  • the edges (28) of the guide ribs (24) can also be sharpened in a cutting shape on the inflow side (arrow 3) «
  • Both displacement bodies (21, 22) are rotated by 45 ° to one another as shown in FIG. 2.
  • Each displacement body reduces the free flow cross-section in the flow channel (14) to less than half the available cross-sectional area.
  • the powder grains can not flow linearly, but are deflected in the circumferential direction and thereby swirled, which brings additional contacts with the boundary surfaces of the displacement body and the powder tube (1). This also takes place at about twice the speed, which considerably increases the effect of the frictional charge.
  • an axial hollow of the core (23) of the displacement body (21) has a cylindrical metal rod (26) which is connected to the respective displacement body , the powder tube (1) and its grounding body (7) is connected by a radially guided pin (27).
  • This pin serves both to ground the displacement body and its positional security. It also serves to form a counter electrode, which includes the grounding body (7) and the metal rod (26).
  • the operating voltage on the high-voltage supply (17) can change the individual operating relationship
  • the powder tube (1) the coating powder and also the type and number of displacement bodies used. It can also be automatically adjusted according to operating data, such as the distance to the workpiece, the percentage of powder deposited, and also according to the current intensity.
  • Mach Fig. Is the powder tube (1) in the manner known from DE-A-25 59 472 installed in the shaft (40) of a spray gun (50) within a shaft tube (50) which is rotatably between a head piece (52) and a foot piece (47) is held on the front of the gun housing (51).
  • a tubular nozzle bush (62) is held inside by means of a nozzle sleeve (69), in which the flow channel (14) is widened from a rear cylinder section (30) to an annular nozzle opening (31).
  • An inner collar (32) of the head piece (52) fits smoothly between the powder tube and spray nozzle into the wall of the flow channel (14).
  • a nozzle bar (39) of the longitudinally adjustable supports a baffle (67).
  • the recharge electrodes (13) are located at a distance from the nozzle opening (31) in the rear end of the nozzle bushing (62). They are connected in the manner known from the aforementioned DE-A-25 59 472 via a high-impedance protective resistor (75) to the high-voltage feed (17), which is led to the outside in the form of a high-voltage cable at the lower end of the pistol grip (33).
  • a conveyor channel (34) is provided in the pistol grip (33) parallel to the routing of this high-voltage cable just as the powder tube (1) itself is connected to a manifold-shaped body (35) in the gun housing (51).
  • an injector nozzle (37) opens into the rear extension of the powder tube (1), to which compressed air is fed through a hose (38).
  • the wall of the conveyor channel (34) usually consists of the same insulating material as the parts (1, 21 and 22) so that the frictional charging of the powder begins here. «Therefore, a displacement body (19) is attached there, which essentially the same effects developed as the displacement body (21 and 22).
  • a baffle (671) with its central bore (72) sits on the front end of a tubular nozzle rod (b6l), which is led out of the back of the gun housing (51) and connected to a compressed gas supply line ( 73) is connected.
  • This nozzle rod can be moved in the direction of the double arrow (74) and the distance of the impact body (67D from the nozzle opening (31) can be changed.
  • the nozzle bushing (621) is smooth cylindrical and shortened compared to the above-described embodiment. It is held in the head piece (52) by a nozzle sleeve (691) overlapping this head piece, on which in turn a nozzle cap
  • the guide body (44) is provided on its circumferential side with helically arranged or formed guide elements (45), which can be designed as grooves or as ribs, so that in each case helical narrow channels are formed through which the powder flow is passed, the Powder is additionally connected to the guide body (44) and the wall of the nozzle cap (70).
  • the guide body like the nozzle cap (70), is expediently made of triboelectric material such as PTFE in order to open up a further possibility of reloading.
  • a tapered guide insert (46) attached to the end of the guide body (44) serves to introduce it into the screw channels.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Abstract

Un courant de gaz porteur de particules pulvérulentes est introduit dans une conduite à poudre (1) par son extrémité d'admission, dans le sens indiqué par la flèche (3), pour recouvrir des pièces à usiner. Les matériaux dont se composent la poudre de revêtement, la conduite à poudre (1) et des corps de refoulement (21, 22) encastrés dans celle-ci ont des constantes diélectriques différentes. A une certaine distance de l'extrémité de sortie (5) est agencé un dispositif de chargement (12) pourvu d'électrodes de recharge (13) faisant saillie vers l'intérieur et connecté à une source de haute tension (17) via une résistance de protection (15). Une contre-électrode arrière (7, 26, 27) comprend un corps de décharge (7) mis à la terre (9). Le courant de particules pulvérulentes est accéléré par les corps de refoulement (21, 22). Les particules pulvérulentes touchent de façon répétée la surface intérieure (11) de la conduite à poudre (1) et les corps de refoulement (21, 22), auxquels elles transmettent, après séparation des charges, des particules à charge négative (10), alors que les particules à charge positive (4) restent collées aux particules pulvérulentes. La concentration de particules à charge négative (10) et à charge positive (4) à des extrémités opposées (2, 5) de la conduite est accrue par le champ électrostatique formé entre les électrodes de recharge (13) et la contre-électrode (7, 26, 27). La poudre de revêtement est ainsi chargée à un si haut degré qu'il n'est plus nécessaire de prévoir un champ électrostatique extérieur entre une électrode de pulvérisation et la pièce à usiner.
EP87900639A 1986-01-14 1987-01-09 Dispositif electrostatique de pulverisation a chargement tribo-electrique de la poudre Expired EP0252954B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87900639T ATE43517T1 (de) 1986-01-14 1987-01-09 Elektrostatische pulverspruehvorrichtung mit triboelektrischer pulveraufladung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863600808 DE3600808A1 (de) 1986-01-14 1986-01-14 Elektrostatische pulverspruehvorrichtung mit triboelektrischer pulveraufladung
DE3600808 1986-01-14

Publications (2)

Publication Number Publication Date
EP0252954A1 true EP0252954A1 (fr) 1988-01-20
EP0252954B1 EP0252954B1 (fr) 1989-05-31

Family

ID=6291791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87900639A Expired EP0252954B1 (fr) 1986-01-14 1987-01-09 Dispositif electrostatique de pulverisation a chargement tribo-electrique de la poudre

Country Status (5)

Country Link
US (1) US4798340A (fr)
EP (1) EP0252954B1 (fr)
JP (1) JPH0673646B2 (fr)
DE (2) DE3600808A1 (fr)
WO (1) WO1987004088A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344082A (en) * 1992-10-05 1994-09-06 Nordson Corporation Tribo-electric powder spray gun

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3600808A1 (de) * 1986-01-14 1987-07-16 Esb Voehringer Elektrostatische pulverspruehvorrichtung mit triboelektrischer pulveraufladung
SE461319B (sv) * 1987-04-28 1990-02-05 Ac Greiff Ytbehandling Ab Anordning vid pulverspruta innefattande en ringformig friktionsuppladdningskanal
DE3730473A1 (de) * 1987-09-11 1989-03-30 Brennenstuhl Kg Hugo Verfahren zum beschichten von gegenstaenden
DD271611A3 (de) * 1987-10-27 1989-09-13 Verkehrswesen Hochschule Spruehpistole mit elektrokinetischer pulveraufladung
DE3924425C1 (en) * 1989-07-24 1990-12-20 Gering, Manfred Electrostatic sprayer for powder lacquering - has coaxial circular channels through which particles pass in zigzag formation
DE4242221C2 (de) * 1992-07-13 1997-08-14 Hans Glogau Triboelektrische Spritzpistole
DE4312262A1 (de) * 1993-04-15 1994-10-20 Gema Volstatic Ag Elektrostatische Sprühvorrichtung
DE69425023T2 (de) * 1993-05-07 2001-02-22 Nordson Corp., Westlake Pulverbeschichtungssystem und Pulverbeschichtungsdicke-Sensor
US5400976A (en) * 1993-06-02 1995-03-28 Matsuo Sangyo Co., Ltd. Frictional electrification gun
DE4325911A1 (de) * 1993-08-02 1995-02-09 Gema Volstatic Ag Elektrostatische Pulversprühvorrichtung
US5622313A (en) * 1995-03-03 1997-04-22 Nordson Corporation Triboelectric powder spray gun with internal discharge electrode and method of powder coating
FR2750897B1 (fr) * 1996-07-10 1998-09-18 Sames Sa Projecteur triboelectrique, installation de projection de produit de revetement et procede de commande d'un tel projecteur
US20040011901A1 (en) * 2000-07-10 2004-01-22 Rehman William R. Unipolarity powder coating systems including improved tribocharging and corona guns
DE60106617T2 (de) * 2000-07-11 2005-12-01 Nordson Corp., Westlake Unipolare pulverbeschichtungssysteme mit verbesserter reibungsaufladung und koronapistolen
US6645300B2 (en) 2000-07-11 2003-11-11 Nordson Corporation Unipolarity powder coating systems including improved tribocharging and corona guns
US20030038193A1 (en) * 2000-07-11 2003-02-27 Rehman William R. Unipolarity powder coating systems including improved tribocharging and corona guns
US6467705B2 (en) * 2001-01-29 2002-10-22 The Easthill Group, Inc. Tribo-corona powder application gun
FR2820344B1 (fr) * 2001-02-08 2003-03-14 Eisenmann France Sarl Pulverisateur triboelectrique
DE10202025B4 (de) * 2002-01-18 2005-08-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Pulversprühvorrichtung und Pulversprühverfahren
DE10261978B3 (de) * 2002-01-18 2004-11-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Pulversprühvorrichtung und Verfahren
US20040159282A1 (en) * 2002-05-06 2004-08-19 Sanner Michael R Unipolarity powder coating systems including improved tribocharging and corona guns
US6889921B2 (en) * 2002-09-30 2005-05-10 Illinois Tool Works Inc. Bell cup skirt
US20050023385A1 (en) * 2003-07-29 2005-02-03 Kui-Chiu Kwok Powder robot gun
US7128277B2 (en) 2003-07-29 2006-10-31 Illinois Tool Works Inc. Powder bell with secondary charging electrode
US20050056212A1 (en) * 2003-09-15 2005-03-17 Schaupp John F. Split shroud for coating dispensing equipment
US20050173556A1 (en) * 2004-02-09 2005-08-11 Kui-Chiu Kwok Coating dispensing nozzle
DE102005017931A1 (de) * 2005-04-18 2006-10-19 Itw Gema Ag Pulversprühbeschichtungspistole und Pistolengehäuse hierzu
USD545943S1 (en) 2006-03-14 2007-07-03 Illinois Tool Works Inc. Coating material dispensing device
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
US10155233B2 (en) * 2008-04-09 2018-12-18 Carlisle Fluid Technologies, Inc. Splash plate retention method and apparatus
GB2476836B (en) * 2010-01-12 2011-11-23 Rolls Royce Plc Spray nozzle
GB2476835B (en) * 2010-01-12 2012-02-01 Rolls Royce Plc Spray nozzle
JP5738546B2 (ja) * 2010-06-07 2015-06-24 トヨタ自動車株式会社 静電塗装装置および静電塗装方法
EP2650051B1 (fr) * 2012-04-10 2019-04-03 Wagner International AG Insert à clavette pour rallonge de tuyau de poudre d'un pistolet de pulvérisation de poudre fonctionnant sous haute tension et rallonge de tuyau de poudre avec insert à clavette
JP5959488B2 (ja) * 2013-10-09 2016-08-02 旭サナック株式会社 粉体塗装方法
USD1027343S1 (en) * 2023-04-17 2024-05-14 Hefei Yaozhong International Trade Co., Ltd. Powder duster

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE6933925U (de) * 1969-08-28 1970-05-14 Mueller Ernst Fa Zerstaeuberduese fuer das pulverspritzen.
US3667675A (en) * 1971-02-16 1972-06-06 Graco Inc Electrostatic powder coating apparatus
DE2203351B1 (de) * 1972-01-25 1973-08-23 Schaad Hans J Verfahren und Vorrichtung zur Beschichtung von Gegenstaenden mit Kunststoffpulver
SE371942B (fr) * 1972-03-13 1974-12-09 Atlas Copco Ab
JPS5243846A (en) * 1975-10-03 1977-04-06 Senichi Masuda Device for electrostatic powder coating
DE2555547C3 (de) * 1975-12-10 1983-06-09 Hajtómüvek és Festöberendezések Gyára, Budapest Vorrichtung zum elektrostatischen Auftragen bzw. Aufsprühen von Materialteilchen
US4090666A (en) * 1976-05-19 1978-05-23 Coors Container Company Gun for tribo charging powder
DE2646798C2 (de) * 1976-10-16 1982-12-16 Haug & Co KG, 7022 Leinfelden-Echterdingen Vorrichtung zur elektrischen Aufladung von flüssigen oder festen Teilchen in einem Gas-, insbesondere Luftstrom und Aufbringung der geladenen Teilchen auf Oberflächen
US4135667A (en) * 1977-03-23 1979-01-23 Hajtomuvek Es Festoberendezesek Gyara Apparatus for the electrostatic coating of workpieces
DD134841B1 (de) * 1978-03-22 1981-05-27 Peter Dressler Vorrichtung zum elektrokinetischen Beschichten mit pulver- und faserförmigen Teilchen
DE2938806A1 (de) * 1978-09-26 1980-04-03 Toyota Motor Co Ltd Triboelektrische pulverspruehpistole
US4225090A (en) * 1979-09-07 1980-09-30 Toyota Jidosha Kogyo Kabushiki Kaisha Device for painting by electrostatic powder spraying
DE3402945C2 (de) * 1984-01-28 1986-07-03 Ransburg-Gema AG, St. Gallen Elektrostatische Sprühpistole zum Sprühbeschichten
DE3420325A1 (de) * 1984-05-30 1985-12-05 Ransburg-Gema AG, St.Gallen Spruehvorrichtung zum beschichten von gegenstaenden mit pulver
DE3430275A1 (de) * 1984-08-17 1986-02-27 Intec Maschinenbau Hans J. Schaad, 4600 Dortmund Verbesserte vorrichtung zur durchfuehrung einer beschichtung von gegenstaenden mit kunststoffpulver
DE8432887U1 (de) * 1984-11-09 1985-02-21 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum elektrostatischen beschichten von gegenstaenden mit kunststoffpulver
DE8516746U1 (de) * 1985-06-07 1985-08-29 Vsesojuznyj naučno-issledovatel'skij, proektno-konstruktorskij i technologičeskij svetotechničeskij institut (VNISI), Moskau/Moskva Vorrichtung zum Auftragen pulverförmiger Stoffe auf Werkstücke
DE3529703C1 (de) * 1985-08-20 1986-08-28 Ransburg-Gema AG, St. Gallen Spruehvorrichtung zur elektrostatischen Pulverbeschichtung
DE3600808A1 (de) * 1986-01-14 1987-07-16 Esb Voehringer Elektrostatische pulverspruehvorrichtung mit triboelektrischer pulveraufladung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8704088A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5344082A (en) * 1992-10-05 1994-09-06 Nordson Corporation Tribo-electric powder spray gun
US5402940A (en) * 1992-10-05 1995-04-04 Nordson Corporation Tribo-electric powder spray gun

Also Published As

Publication number Publication date
DE3760194D1 (en) 1989-07-06
US4798340A (en) 1989-01-17
JPS63502408A (ja) 1988-09-14
JPH0673646B2 (ja) 1994-09-21
EP0252954B1 (fr) 1989-05-31
DE3600808A1 (de) 1987-07-16
WO1987004088A1 (fr) 1987-07-16

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