EP0463327B1 - Pistolet de pulvérisation électrostatique - Google Patents

Pistolet de pulvérisation électrostatique Download PDF

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Publication number
EP0463327B1
EP0463327B1 EP91107219A EP91107219A EP0463327B1 EP 0463327 B1 EP0463327 B1 EP 0463327B1 EP 91107219 A EP91107219 A EP 91107219A EP 91107219 A EP91107219 A EP 91107219A EP 0463327 B1 EP0463327 B1 EP 0463327B1
Authority
EP
European Patent Office
Prior art keywords
cascade
high voltage
tube
transformer
insulating material
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
EP91107219A
Other languages
German (de)
English (en)
Other versions
EP0463327A3 (en
EP0463327A2 (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 EP0463327A2 publication Critical patent/EP0463327A2/fr
Publication of EP0463327A3 publication Critical patent/EP0463327A3/de
Application granted granted Critical
Publication of EP0463327B1 publication Critical patent/EP0463327B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 paint spray gun with built-in high voltage generator according to the preamble of claim 1.
  • a paint spray gun is known from DE-A-31 26 936.
  • the high-voltage cascade obtains its stability solely from the hardened casting compound.
  • this entails the risk that components, i.e. capacitors and diodes, of the cascade shift or twist against one another before or during the encapsulation or during the period between the encapsulation and hardening of the encapsulation compound, which leads to overstressing of the cascade solder joints and to insulation problems can.
  • the object of the present invention is therefore to ensure that an exact positioning of the components of the cascade and the associated resistors and connecting lines is guaranteed in the potting.
  • the solution to this problem follows from the characteristic ones Features of claim 1.
  • the capacitors, the diodes and the high-voltage resistors are arranged on a carrier tube having an end flange, which ensures both a fixed positioning of these components with one another and the entire cascade with respect to the transformer before and during the potting, which means that the production committee is reduced and the insulation reliability and service life of the cascade is increased.
  • the interior of the carrier tube serves to guide the electrode feed wire and to connect it to the high-voltage output of the cascade, as is characterized in claim 2.
  • the invention is particularly suitable for use in a cascade transformer arrangement according to German patent DE-C-3 921 213. To facilitate understanding of the invention, this arrangement is therefore first explained below with reference to FIG. 1 .
  • Fig. 1 10 denotes a transformer and 11 a high-voltage cascade, these two components being arranged coaxially one behind the other and cast in a common insulating body 12 of cylindrical shape.
  • This insulating material body 12 is inserted in a known manner into the gun tube of the electrostatic paint spray gun (not shown).
  • two connecting pins 13 protrude for connecting the low-voltage side (primary coil) of the transformer 10 to the power line, from the front end face of the insulating body a sheathed supply strand 14, which also supplies the high voltage supplied by the high-voltage side output of the cascade 11 Not drawn - feeds the paint spray gun.
  • the high-voltage output 11a of the high-voltage cascade 11 faces the transformer 10, and the low-voltage input 11b faces away from the transformer 10.
  • the output line 15 of the transformer 10 therefore leads axially parallel to the cascade 11 along this and opens into the low-voltage input 11b of the cascade 11 facing away from the transformer 10.
  • the line 15 is a non-sheathed wire.
  • a tube 16 which is also made of insulating material, is cast into the insulating body 12 and is designed as a plug receptacle at its end facing the transformer 10.
  • a lead wire 18 leading from the high-voltage end 11a of the cascade 11 leads via known output resistors 19 to the plug receptacle of the tube and is conductively connected to it, for example by soldering.
  • the other end of the tube 16 opens onto the front end face of the insulating body 12, and from this open end the electrode feed wire 14 is inserted into the tube, the front end of the wire being stripped and inserted under pressure into the connector receptacle.
  • an insulation liquid can be filled into the tube 16 in an air-free manner and then a liquid and airtight seal can be achieved by an O-ring.
  • the support tube designated as a whole by 20, consists of a pipe section 21 and a ring flange 22, which is integral therewith and is located in an end region of the pipe section 21.
  • the ring flange 22 has three through-holes 23 of comparatively large diameter and two through-holes 24 comparatively small diameter.
  • the inner bore 21a of the tube piece 21 has a tapered region 21b at its flange-side end (on the right in the drawing) and a conically widening region 21c at its opposite end (on the left in the drawing).
  • the components of the high-voltage cascade are on the carrier tube 20 (Cascade 11 of Fig. 1) arranged as shown in Fig. 4.
  • two packets of capacitors 25 are arranged on the right and left of the pipe section 21a.
  • Diodes 26 are arranged at the top of the pipe section 21a, the capacitor packs being connected to one another in a known manner by the diodes in a cross manner. With 27 soldering points are designated.
  • the electrical connection of the high-voltage cascade is carried out as follows, reference being made again to FIG. 1.
  • the output line 15 of the transformer 10, consisting of two bare wires, is threaded through the bores 24 of the flange 22 and guided below the pipe section 21 in parallel to the left end of the pipe section 21, where it is then connected to the low-voltage input 11b of the cascade 11.
  • the tube 16 is first inserted from the left into the inner bore 21a of the support tube 20, whereupon a clamping sleeve (not shown) is pressed into the conical region 21c of the tube piece 21, so that the tube 16 is locked in the inner bore 21a .
  • the line wire 18 coming from the high-voltage end 11a of the cascade 11 is inserted through the region 21b into the aforementioned plug receptacle of the tube 16 and connected to it in a conductive manner.
  • the three output resistors 19 of the output line 18 are inserted into the three bores 23 of the flange 22 and are thus securely positioned.
  • the encapsulation can take place, so that the insulating body 12 is formed.
  • the electrode feed wire 14 is now pushed into the tube through the clamping sleeve opening at the front end face of the insulating material body 12, and the stripped front end of the wire is pushed under pressure into the connector receptacle located at the other tube end.
  • In the end insulating oil is poured into the tube and the open annular gap mouth sealed with an O-ring.
  • a cable guide as shown in cross section in FIG. 5, can be attached to the underside of the pipe section 21 which is not occupied by electrical components.
  • This cable guide 30 extends essentially from the left end (FIG. 2) of the pipe section 21 to the flange 22 and its upper side 30a is curved in accordance with the outer jacket of the pipe section 21.
  • the cable guide 30 has two longitudinal slots 31, which serve to receive the low-voltage wires 15.
  • the wires 15 threaded through the flange bores 24 therefore do not run freely below the pipe section 21 to the low-voltage input 11b of the cascade 11, but are guided in the slots 31.
  • the cable guide 30 ensures a positionally accurate positioning of the cascade 11 and secures it against rotation.
  • the cable guide 30 can, as shown, be an independent component that is attached to the pipe section 21, but it is also possible to form the cable guide 30 on the pipe section 21 so that it is an integral part of the support tube 20.
  • the carrier tube 20, the tube 16 and the cable guide 30 are expediently made of a material that enters into an intimate connection with the sealing compound of the insulating body 12, so that there is no gap between these components and the sealing compound after the casting.
  • the invention is not restricted to the exemplary embodiment shown.
  • the tube 16 can be an integral part of the tube piece 21, in other words, the inner jacket of the tube piece 21 can be designed such that a separate one Tube 16 is unnecessary.
  • the support tube according to the invention is not only applicable if, as in the arrangement described, the high-voltage output of the cascade is adjacent to the transformer, rather the application is always expedient when exact and stable positioning of the high-voltage cascade and its components can be achieved with one another should.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Claims (5)

  1. Pistolet de pulvérisation électrostatique à générateur de haute tension intégré, ledit pistolet étant constitué d'un transformateur (10) et d'une cascade à haute tension (11) qui est disposée en aval de celui-ci et qui s'étend dans le tube du pistolet, l'entrée à basse tension (11b) de la cascade (11) étant reliée à la sortie (15) du transformateur, la sortie à haute tension (11a) de la cascade (11) étant reliée à un fil (14) d'alimentation de l'électrode à haute tension du pistolet par l'intermédiaire de résistances de sortie (19), et le transformateur (10) et la cascade (11) étant scellés dans un corps en matériau isolant (12), caractérisé en ce que la cascade à haute tension (11) est montée sur un tube porteur (20) qui comporte un collet annulaire (22) pourvu de perçages (23) pour positionner les résistances de sortie (19).
  2. Pistolet de pulvérisation électrostatique selon la revendication 1, dans lequel la sortie à haute tension (11a) de la cascade à haute tension (11) est tournée vers le transformateur (10), caractérisé en ce que le fil (14) d'alimentation de l'électrode traverse le perçage intérieur (21a) du tube porteur (20) et est relié, à l'intérieur de ce perçage (21), à la sortie à haute tension (11a, 18) de la cascade à haute tension (11).
  3. Pistolet de pulvérisation électrostatique selon la revendication 2, comprenant un petit tube en matériau isolant (16) dont l'extrémité voisine de la sortie à haute tension (11a) de la cascade et conçue en forme de logement de contact est reliée à l adite sortie à haute tension (11a) de manière conductrice, et dont l'autre extrémité débouche vers l'extérieur sur le corps en matériau isolant, le fil (14) d'alimentation de l'électrode étant introduit dans le petit tube en matériau isolant (16) et son extrémité dénudée étant enfoncée dans le logement de contact caractérisé en ce que le perçage intérieur (21a) du tube porteur (20) se présente sous la forme d'un logement pour le petit tube en matériau isolant (16).
  4. Pistolet de pulvérisation électrostatique selon la revendication 2 ou 3, caractérisé en ce que des perçages de guidage (24) pour les fils à basse tension (15) sont prévus dans le collet annulaire (22) du tube porteur (20).
  5. Pistolet de pulvérisation électrostatique selon l'une des revendications 2 à 4, caractérisé par un guide-câble (30) qui est monté sur le tube porteur (20) ou qui y est moulé.
EP91107219A 1990-06-26 1991-05-03 Pistolet de pulvérisation électrostatique Expired - Lifetime EP0463327B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020289 1990-06-26
DE4020289A DE4020289C1 (fr) 1990-06-26 1990-06-26

Publications (3)

Publication Number Publication Date
EP0463327A2 EP0463327A2 (fr) 1992-01-02
EP0463327A3 EP0463327A3 (en) 1992-09-02
EP0463327B1 true EP0463327B1 (fr) 1994-10-19

Family

ID=6409086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107219A Expired - Lifetime EP0463327B1 (fr) 1990-06-26 1991-05-03 Pistolet de pulvérisation électrostatique

Country Status (4)

Country Link
US (1) US5184276A (fr)
EP (1) EP0463327B1 (fr)
JP (1) JPH06339646A (fr)
DE (1) DE4020289C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10150759B4 (de) * 2001-10-13 2019-02-14 Gema Switzerland Gmbh Pulverspritzpistole für Beschichtungspulver

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH496481A (de) * 1969-06-25 1970-09-30 Gema Ag App Bau Vorrichtung zum elektrostatischen Beschichten von Gegenständen mit zerstäubten Feststoffpartikeln
US3599038A (en) * 1969-07-28 1971-08-10 Hipotronics Apparatus and systems for high-voltage electrostatic charging of particles
US3731145A (en) * 1970-11-23 1973-05-01 Nordson Corp Electrostatic spray gun with self-contained miniaturized power pack integral therewith
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
US4290091A (en) * 1976-12-27 1981-09-15 Speeflo Manufacturing Corporation Spray gun having self-contained low voltage and high voltage power supplies
CH623489A5 (fr) * 1977-12-08 1981-06-15 Gema Ag
FR2424068A1 (fr) * 1978-04-28 1979-11-23 Wagner J Ag Pistolet pulverisateur electrostatique
US4323947A (en) * 1979-08-13 1982-04-06 J. Wagner Ag. Electrostatic gun with improved diode-capacitor multiplier
DE3008843A1 (de) * 1980-03-07 1981-10-01 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Kompakteinheit zur hochspannungserzeugung fuer elektrostatische spritz- und lackiergeraete
US4377838A (en) * 1980-11-17 1983-03-22 Speeflo Manufacturing Corporation Electrostatic spray gun apparatus
DE8119946U1 (de) * 1981-07-08 1982-09-09 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Elektrostatische Beschichtungspistole
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
US4508276A (en) * 1982-09-29 1985-04-02 Titan Tool Inc. Current limited electrostatic spray gun system with positive feedback controlled constant voltage output
DE3243447C2 (de) * 1982-11-24 1984-09-20 Ransburg-Gema AG, St.Gallen Spritzvorrichtung zum elektrostatischen Beschichten von Gegenständen mit Beschichtungsmaterial
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
US4598871A (en) * 1984-05-10 1986-07-08 Nordson Corporation Multiple process electrostatic spray gun having integral power supply
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
DE3921213C1 (fr) * 1989-06-28 1990-11-15 Wagner International Ag, Altstaetten, Ch

Also Published As

Publication number Publication date
EP0463327A3 (en) 1992-09-02
EP0463327A2 (fr) 1992-01-02
DE4020289C1 (fr) 1991-12-12
US5184276A (en) 1993-02-02
JPH06339646A (ja) 1994-12-13

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