EP0472817B1 - Pistolet de pulvérisation électrostatique - Google Patents

Pistolet de pulvérisation électrostatique Download PDF

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Publication number
EP0472817B1
EP0472817B1 EP91107412A EP91107412A EP0472817B1 EP 0472817 B1 EP0472817 B1 EP 0472817B1 EP 91107412 A EP91107412 A EP 91107412A EP 91107412 A EP91107412 A EP 91107412A EP 0472817 B1 EP0472817 B1 EP 0472817B1
Authority
EP
European Patent Office
Prior art keywords
carrier plate
electrostatic spray
spray pistol
voltage generator
capacitor
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
EP91107412A
Other languages
German (de)
English (en)
Other versions
EP0472817A3 (en
EP0472817A2 (fr
Inventor
Georg Simon
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.)
Wagner International AG
Original Assignee
Wagner International AG
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 Wagner International AG filed Critical Wagner International AG
Publication of EP0472817A2 publication Critical patent/EP0472817A2/fr
Publication of EP0472817A3 publication Critical patent/EP0472817A3/de
Application granted granted Critical
Publication of EP0472817B1 publication Critical patent/EP0472817B1/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
    • B05B5/053—Arrangements for supplying power, e.g. charging power
    • B05B5/0531—Power generators

Definitions

  • the invention relates to an electrostatic spray gun, in particular a manual spray gun, for coating workpieces with liquid or powder coating material according to the preamble of patent claim 1
  • LU-A-67 141 discloses a high-voltage generator with the features of the preamble of claim 1, namely a high-voltage cascade for the high-voltage generator of an electrostatic powder coating device, which is implemented by a printed circuit comprising two or more superimposed layers, one layer for even-numbered capacitors and the other layer is for odd-numbered capacitors. Diodes are soldered directly to the connections of the capacitors, and the entire assembly is coated with a resin.
  • the multistage voltage multiplier high-voltage cascade
  • the spray gun for example to install it in the pistol grip or the pistol barrel.
  • the dimensions and the weight of the high-voltage cascade have been reduced in recent years, which is understandably of crucial importance, especially with hand spray guns.
  • the dimensions of the required capacitor and diode modules are likely to be a limit to a further reduction in space and weight set without the goals already being achieved.
  • the object of the present invention is therefore to design a voltage multiplier intended for installation in or attachment to an electrostatic spray gun in such a way that its dimensions and weight can be reduced still further.
  • This object is achieved by a high-voltage generator for an electrostatic spray gun with the features of claim 1.
  • FIG. 1 shows a carrier plate of rectangular extension made of sintered ceramic.
  • a large number of corresponding capacitor areas 11 are printed on the upper and lower surfaces of this carrier plate 10, in the form of two opposing rows of capacitors, similar to the arrangement of the capacitors of a conventional high-voltage cascade.
  • the electrical supply and discharge is carried out by printed conductor tracks 12, which are also printed.
  • FIG Embodiment of the entire high-voltage cascade, the diodes 13 which are still required being applied to the carrier plate 10 with capacitors 11 and conductor tracks 12 from FIG. 1 and are correspondingly connected to the capacitors by soldering.
  • synthetic resin for example.
  • circuit diagram of this high-voltage cascade from FIG. 2 corresponds entirely to that of a high-voltage cascade constructed using conventional capacitors, so that a special explanation is unnecessary.
  • the dimensions and also the weight of the high-voltage cascade according to FIG. 2 are, however, considerably smaller than in the case of conventionally constructed high-voltage cascades.
  • Figure 3 shows a modification of the high-voltage cascade of Figure 2.
  • the modification consists in that the carrier plate 10 of Figure 3 has been extended on one side and protective resistors 14 and / or other electronic components are arranged on the extension area 10 ', as in electrostatic spray guns between the high-voltage output of the cascade and charging electrode are common and necessary.
  • FIG. 4 shows a further carrier plate 15, for example likewise made of sintered ceramic, on which diodes 16 are printed as doped silicon rods or strips and contact areas 17 to form a diode matrix.
  • This carrier plate 15 with a diode matrix is intended for combination with the carrier plate 10, the active surfaces of the carrier plates 10 and 15 being placed on one another by soldering the capacitor and diode connections. Finally, these double plates 10, 15 can then be cast with synthetic resin.
  • the carrier plate 10 preferably consists made of sintered ceramic.
  • the capacitor areas can then be printed on using a layout template, for example.
  • the thickness of the carrier plate 10 must be selected in relation to the capacitors so that no breakdowns occur for a given capacitance, specifically depending on the high-voltage strength and the number of stages of the cascade. If one chooses a comparatively large number of cascade steps for a given total capacity of the voltage multiplier, then a comparatively long carrier plate 10 is required, the thickness of which may be kept small, whereas with a few cascade steps the carrier plate 10 may be short but have a comparatively large thickness got to. In this way it is possible to adapt to the respective requirements, given by the required electrical values and the space available for the respective spray gun.
  • the carrier plate 15 for the diode matrix can also consist of sintered ceramic, but a carrier plate 15 made of insulating plastic is also possible, because a lower dielectric constant is sufficient for the carrier plate 15 than for the carrier plate 10 for the capacitors.
  • the two carrier plates 10, 15 are then placed one on top of the other, it being irrelevant whether the two carrier plates 10, 15 lie directly on one another with their surfaces or are at a minimal distance, because this component 10, 15 ultimately has insulating plastic is cast around.
  • the diode part can also be constructed and encapsulated as is known from today's integrated circuits. Another modification possibility is to design the carrier plates 10 and / or 15 not as straight rectangular plates, but as curved plates, in order to take account of the specified installation conditions. The leadership of the High-voltage cables can be arranged in the curve. Of course, in the case of curved carrier plates, care must be taken that the printed active areas are each of the same size.
  • printing should also be understood to mean known equivalent application methods, such as, for example, vapor deposition and lamination.

Claims (7)

  1. Générateur haute tension pour un pistolet de pulvérisation électrostatique, en particulier pistolet de pulvérisation manuel, destiné à recouvrir des pièces d'un matériau de revêtement liquide ou pulvérulent, comportant une cascade haute tension intégrée ou appliquée, à plusieurs étages, constituant un multiplicateur de tension, faite de condensadeurs (11) et de diodes (13), la cascade haute tension présentant une première plaque de support (10) sur laquelle sont appliquées des pistes conductrices (12) et des surfaces de condensateur (11), et la plaque de support (10) est enrobée d'une masse isolante, caractérisé en ce que les surfaces de condensateur (11) sont imprimées, appliquées par métallisation sous vide ou plaquées sur des surfaces opposées de la plaque, en formant une matrice de condensateurs, en ce que les pistes conductrices (12) sont imprimées, appliquées par métallisation sous vide ou plaquées sur la plaque de support (10), en ce que la première plaque de support (10) est constituée d'un matériau à constante diélectrique élevée et en ce qu'une seconde plaque de support (15) est prévue sur laquelle est imprimée, appliquée par métallisation sous vide ou plaquée une matrice de diodes correspondant à la matrice de condensateurs de la première plaque de support (10), les deux plaques de support (10, 15) pourvues de la matrice de condensateurs ou de la matrice de diodes étant enrobées superposées, avec un matériau isolant.
  2. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon la revendication 1, caractérisé en ce que la première plaque de support (10) comporte un prolongement (10') dépassant la matrice de condensateurs, en vue de l'application de résistances (14) et/ou d'autres composants électroniques.
  3. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon la revendication 1 ou 2, caractérisé en ce que la première plaque de support (10) est en céramique frittée.
  4. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon l'une des revendications précédentes, caractérisé en ce que la seconde plaque de support (15) est en céramique frittée ou en matière plastique.
  5. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon l'une des revendications précédentes, caractérisé en ce que les deux plaques de support (10, 15) sont réunies en une plaque céramique d'une seule pièce qui est imprimée, par technique à pellicule épaisse, avec des pistes conductrices (12), des condensateurs (11) et des diodes (13).
  6. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon l'une des revendications précédentes, caractérisé en ce que les plaques de support (10, 15) sont cintrées.
  7. Générateur haute tension pour un pistolet de pulvérisation électrostatique, selon l'une des revendications 2 à 6 précédentes, caractérisé en ce que les résistances et/ou d'autres composants électroniques sont imprimés, appliqués par métallisation sous vide ou plaqués sur le prolongement (10').
EP91107412A 1990-08-27 1991-05-07 Pistolet de pulvérisation électrostatique Expired - Lifetime EP0472817B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4027078A DE4027078A1 (de) 1990-08-27 1990-08-27 Elektrostatische spruehpistole
DE4027078 1990-08-27

Publications (3)

Publication Number Publication Date
EP0472817A2 EP0472817A2 (fr) 1992-03-04
EP0472817A3 EP0472817A3 (en) 1992-09-02
EP0472817B1 true EP0472817B1 (fr) 1995-08-09

Family

ID=6413016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107412A Expired - Lifetime EP0472817B1 (fr) 1990-08-27 1991-05-07 Pistolet de pulvérisation électrostatique

Country Status (4)

Country Link
US (1) US5170315A (fr)
EP (1) EP0472817B1 (fr)
JP (1) JPH04235763A (fr)
DE (2) DE4027078A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9420511D0 (en) * 1994-10-11 1994-11-23 Ici Plc High voltage generator
JP2004167411A (ja) * 2002-11-21 2004-06-17 Anest Iwata Corp 静電塗装用高電圧発生器
DE102011121915A1 (de) * 2011-12-22 2013-06-27 Eisenmann Ag Elektrodenanordnung und elektrostatischer Zerstäuber mit einer solchen

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599038A (en) * 1969-07-28 1971-08-10 Hipotronics Apparatus and systems for high-voltage electrostatic charging of particles
GB1425506A (en) * 1972-03-03 1976-02-18 Redelec High-voltage dc generator in an electrostatic apparatus
IT1006799B (it) * 1973-02-01 1976-10-20 Air Ind Cascata moltiplicatrice e fistola di spruzzatura elettrostatica a ca scata incorporata
SE386841B (sv) * 1973-04-19 1976-08-23 Atlas Copco Ab Elektrostatisk fergspruta
US4033506A (en) * 1974-08-06 1977-07-05 Franz Braun Electrostatic coating guns
US4171098A (en) * 1974-08-06 1979-10-16 Franz Braun Electrostatic coating guns
US4290091A (en) * 1976-12-27 1981-09-15 Speeflo Manufacturing Corporation Spray gun having self-contained low voltage and high voltage power supplies
US4165022A (en) * 1977-03-02 1979-08-21 Ransburg Corporation Hand-held coating-dispensing apparatus
CH623489A5 (fr) * 1977-12-08 1981-06-15 Gema Ag
FR2424068A1 (fr) * 1978-04-28 1979-11-23 Wagner J Ag Pistolet pulverisateur electrostatique
US4266262A (en) * 1979-06-29 1981-05-05 Binks Manufacturing Company Voltage controlled power supply for electrostatic coating apparatus
US4323947A (en) * 1979-08-13 1982-04-06 J. Wagner Ag. Electrostatic gun with improved diode-capacitor multiplier
IT1137200B (it) * 1980-07-10 1986-09-03 Roederstein Ernst Spezialfabri Apparecchio manuale per il floccaggio elettrostatico di oggetti
US4441656A (en) * 1982-01-29 1984-04-10 J. Wagner Ag Electrostatic disabling switch for electrostatic spray guns
FR2522991A1 (fr) * 1982-03-08 1983-09-16 G2M Lepetit Appareil de pulverisation pneumatique de liquide sous forme d'un jet
DE3214314A1 (de) * 1982-04-19 1983-10-20 J. Wagner AG, 9450 Altstätten Elektrostatische spruehvorrichtung
US4554622A (en) * 1983-09-22 1985-11-19 Graco Inc Compact voltage multiplier for spray guns
DE3412266A1 (de) * 1984-04-02 1985-10-03 J. Wagner AG, Altstätten Elektrostatische farbspritzpistole
DE3412507A1 (de) * 1984-04-03 1985-10-17 J. Wagner AG, Altstätten Elektrostatische handspritzpistole
FR2587919B1 (fr) * 1985-10-02 1988-05-27 Sames Sa Appareil de projection electrostatique protege contre l'apparition d'arcs electriques
DE3545885C1 (de) * 1985-12-23 1993-03-04 Kopperschmidt Mueller & Co Elektrostatische Spruehpistole
DE3644840A1 (de) * 1986-04-04 1987-10-15 Wagner Int Elektrostatische pulver-spruehpistole
FR2618618A1 (fr) * 1987-07-20 1989-01-27 Gema Ransburg Ag Dispositif de revetement par pulverisation, a synchronisation de phases de la tension alternative appliquee a son transformateur, et du courant circulant dans ce transformateur
DE3921213C1 (fr) * 1989-06-28 1990-11-15 Wagner International Ag, Altstaetten, Ch

Also Published As

Publication number Publication date
DE4027078A1 (de) 1992-03-05
DE59106204D1 (de) 1995-09-14
JPH04235763A (ja) 1992-08-24
US5170315A (en) 1992-12-08
EP0472817A3 (en) 1992-09-02
EP0472817A2 (fr) 1992-03-04

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