EP1238709A2 - Pistolet de pulvérisation de poudre pour poudre de revêtement - Google Patents

Pistolet de pulvérisation de poudre pour poudre de revêtement Download PDF

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Publication number
EP1238709A2
EP1238709A2 EP01128493A EP01128493A EP1238709A2 EP 1238709 A2 EP1238709 A2 EP 1238709A2 EP 01128493 A EP01128493 A EP 01128493A EP 01128493 A EP01128493 A EP 01128493A EP 1238709 A2 EP1238709 A2 EP 1238709A2
Authority
EP
European Patent Office
Prior art keywords
powder
tube
spray gun
gun according
powder spray
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
EP01128493A
Other languages
German (de)
English (en)
Other versions
EP1238709B1 (fr
EP1238709A3 (fr
Inventor
Hanspeter Michael
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
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP1238709A2 publication Critical patent/EP1238709A2/fr
Publication of EP1238709A3 publication Critical patent/EP1238709A3/fr
Application granted granted Critical
Publication of EP1238709B1 publication Critical patent/EP1238709B1/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
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive

Definitions

  • the invention relates to a powder spray gun for coating powder according to the preamble of claim 1.
  • the invention relates to a powder spray gun for Coating powder containing at least one high-voltage electrode for electrostatic powder charging, an electric powder tube insulating material, which is in the Powder spray gun extends, a connecting pipe made of electrically insulating Material, the front end of which is with the rear end of the powder tube is connected and the rear end with a powder hose is pluggable, a socket made of electrically conductive material, which surrounds the powder tube in a sealing manner and can be connected to earth potential Dissipation of electrical charges.
  • Fig. 3 of the drawings attached here shows a hose-powder tube connection this type of known powder spray gun for Coating powder.
  • a socket 6 is made of electrically conductive Aluminum attached and glued to the powder tube.
  • the socket has on her front end an external thread 8 for screwing into a Threaded hole in the powder spray gun.
  • a connecting pipe 10 or Connection nipple is in the rear end portion 12 of the socket 6, which over the rear tube end of the powder tube 4 protrudes, inserted and through sealed an O-ring 14 against the socket 6. From the socket 6 protruding rear end portion of the connecting pipe 10 is a Powder hose 16 attachable.
  • the socket 6 is electrical with earth potential connectable.
  • the socket 6, which consists of electrically conductive material, has of one or more high voltage electrodes 18 which are only schematic indicated powder spray gun 5 a distance of, for example, 330 mm. This makes the gun safe in terms of electrical safety (electricity and Arcing on an operator) is fine, but there is a danger in extreme situations that the electrical voltage is present the high voltage electrode 18 collapses when metallic powder (Coating powder containing metal powder or metal particles) as Coating powder is used to coat objects. at different types of metallic powder accumulate in an undesirable manner Metal particles on the inner walls of the powder tube 2, the connecting tube 10 and the powder hose 16.
  • the high voltage electrode 18 (one or more) is close to or in a mouthpiece 20 or atomizer nozzle, at which the coating powder 22 atomizes and towards coating object is sprayed.
  • the object of the invention is to achieve a collapse of the High voltage of the at least one high voltage electrode Powder spray gun to be easily avoided even when using metallic powder is used as coating powder.
  • a high voltage powder spray gun is in accordance with the invention characterized in that the front end portion of the connecting pipe and the rear end portion of the powder tube axially overlapping each other and are hermetically sealed so far that they are electrically connected between them insulating isolating section to avoid electrical currents from your Form inside to its outside, and that the bushing extends axially up to or via the outer overlap end of the connection pipe-powder pipe connection extends to discharge electrical charges, if any outer overlap end between the connecting pipe and the powder pipe emerge despite the isolation gap.
  • front means in the powder flow direction downstream
  • rear upstream in the powder flow direction. behind thus means on the left in FIG. 1 and on the bottom in FIG. 2. ahead means on the right in FIG. 1 and on the top in FIG. 2.
  • the high voltage powder spray guns 30 and 30 shown in FIGS. 30-2 according to the invention for coating powder in particular for metallic powder (Metal powder or in particular powder containing metal particles, e.g. Plastic powder) have at least one high-voltage electrode 32 in the Near or in a spray opening 34 for electrostatic charging of Coating powder 36.
  • the coating powder 36 flows in the Powder spray gun at least in its initial section through a powder tube 38 made of electrically insulating material, which from a Gun inlet side 40 protrudes.
  • a bushing 42 is on the powder tube 38 (Screw-in part) made of electrically conductive material, e.g. B. aluminum, airtight attached and on its inner circumferential surface by adhesive with the Glued outer peripheral surface of the powder tube 38.
  • the one made of metal Bushing 42 has an external thread 44 at its front end section which they into an internal thread 46 of a holder 48 of the powder spray gun 30 is screwed in.
  • the electrically conductive socket 42 can be connected to earth potential 50, for example by an earth screw or a metal bracket 52, which is pivotally arranged on the holder 48 and into an outer circumferential groove 54 can be swung in or swung out.
  • a connecting tube 56 and the powder tube 38 are axially fitted into one another, preferably inserted into each other.
  • the connecting pipe 56 or connecting nipple made of electrically insulating material, e.g. B. plastic has a front Pipe section 58, which is airtight on a rear end portion 60 of the Powder tube 38 is attached.
  • the front pipe section 58 of the Connection tube 56 protrudes axially forward into an annular space between the Powder tube 38 and a rear end portion 62 with a larger diameter the sleeve 42 is formed, and is therein with the sleeve 42 axially and radially connected is.
  • the front end section 58 of the connecting pipe 56 be provided with an external thread 64 which fits into an internal thread 66 the socket 42 is screwed.
  • Another mounting option would be an adhesive or a snap connection.
  • the rear end portion 60 of the powder tube 38 protrudes axially rearward from the Socket 42 out.
  • the rear powder tube end 69 sits on an annular Paragraph 68, which in the connecting tube 56 between one in diameter larger, front bore section 70 receiving the powder tube 38 and a relatively smaller diameter rear bore section 72 of the connecting tube 56 is formed.
  • the powder tube 38 protrudes rearward by a tube length 74 over the rear end of the electrically conductive socket 42 out. Between the rear powder tube end 69 of the electrically insulating material existing powder tube 38 and the front end 78 of the also electrically insulating material existing connecting tube 56 is through whose axial overlap area is sufficiently long electrically isolating insulating section 76 is formed, which prevents electrical Charges from the powder tube 38 to the electrically conductive and grounded Socket 50 can drain.
  • the socket 42 extends axially over the outer overlap end 78 (front connecting pipe end 78) of the Connection pipe-powder pipe connection for picking up and discharging electrical charges, if such despite the long electrical insulation distance 76 at the outer overlap end 78 between the connecting pipe 56 and the Powder tube 38 should emerge.
  • the powder hose 84 consists of electrically insulating material.
  • the critical area which is beyond the outer Overlap end 88 between the front hose end 86 and the Connection tube 56 extends through a shielding jacket 90 with a radial Safety distance to avoid arcing, which is made of electrically conductive material and on its front End is electrically connected to the socket 42 connectable to earth 50.
  • the electrically conductive shielding jacket 90 is preferably axially resilient compressible, so that to attach the powder hose 84 to the Connection tube 56, the rear end 92 of the shielding jacket 90 at least as far forward in the direction of the socket 42 as the Powder hose 84 must be plugged onto the connecting pipe 56.
  • the front end portion 94 is the shield shell 90 between the outer circumference of the connecting tube 56 and this overlapping rear end portion 62 of the socket 42 inserted, preferably clamped.
  • the front end portion 94 of the Shielding jacket 90 in the threads of the threads 64 and 66 this engage both parts. In this area, these parts can also be used together be glued.
  • the front end portion 94 of the shield shell 90 has one on the outer diameter of the front end portion 58 of the Connection tube 56 reduced diameter, while its rear End section 96 at least at the overlap end 88 of the connecting pipe powder hose connector has a larger inner diameter.
  • the Shielding jacket 90 is preferably a helical spring Compression spring, as shown in Fig. 1.
  • the high-voltage powder spray gun 30 shown schematically in FIG Coating powder can be either a "gun shape” or an elongated one Have shape, from the rear gun inlet side, the powder tube 38 axially protrudes.
  • the high voltage powder spray gun 30-2 can also "Gun shape" with a gun barrel 100 and with one down protruding pistol grip 102, from its lower end if this is the gun inlet side 40, the rear end portion 60 of the powder tube 38 protrudes.
  • Fig. 1 corresponding parts are in Fig. 2 with the same Provide reference numbers and are not described again.
  • Fig. 2 shows that the high voltage for the high voltage electrode 32 of the Powder spray gun 30-2, instead of being supplied externally, by one in integrated high voltage generator 104 can be generated, which An electrical low voltage can be supplied via a cable 106.
  • Cable 106 may also include an electrical lead Grounding of the socket 42 (preferably a screwable part into the gun) Aluminum).
  • a compressed air connection 108 for supplying compressed air to the high voltage electrode 32 and a trigger 110 for manual Switching on and switching off the gun operation should be provided.
EP01128493A 2001-03-09 2001-12-07 Pistolet de pulvérisation de poudre pour poudre de revêtement Expired - Lifetime EP1238709B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10111697 2001-03-09
DE10111697A DE10111697A1 (de) 2001-03-09 2001-03-09 Pulversprühpistole für Beschichtungspulver

Publications (3)

Publication Number Publication Date
EP1238709A2 true EP1238709A2 (fr) 2002-09-11
EP1238709A3 EP1238709A3 (fr) 2003-06-18
EP1238709B1 EP1238709B1 (fr) 2004-10-20

Family

ID=7677081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01128493A Expired - Lifetime EP1238709B1 (fr) 2001-03-09 2001-12-07 Pistolet de pulvérisation de poudre pour poudre de revêtement

Country Status (7)

Country Link
US (1) US6758425B2 (fr)
EP (1) EP1238709B1 (fr)
JP (1) JP2002263526A (fr)
AT (1) ATE279989T1 (fr)
CA (1) CA2373865C (fr)
DE (2) DE10111697A1 (fr)
ES (1) ES2231378T3 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7216814B2 (en) * 2003-10-09 2007-05-15 Xiom Corp. Apparatus for thermal spray coating
DE112006002654T5 (de) * 2005-10-07 2008-08-14 Abb As Farb-/Lackapplikationsvorrichtung und System mit derselben
US8016213B2 (en) * 2008-03-10 2011-09-13 Illinois Tool Works Inc. Controlling temperature in air-powered electrostatically aided coating material atomizer
US8590817B2 (en) * 2008-03-10 2013-11-26 Illinois Tool Works Inc. Sealed electrical source for air-powered electrostatic atomizing and dispensing device
US8770496B2 (en) 2008-03-10 2014-07-08 Finishing Brands Holdings Inc. Circuit for displaying the relative voltage at the output electrode of an electrostatically aided coating material atomizer
US7988075B2 (en) 2008-03-10 2011-08-02 Illinois Tool Works Inc. Circuit board configuration for air-powered electrostatically aided coating material atomizer
USD608858S1 (en) 2008-03-10 2010-01-26 Illinois Tool Works Inc. Coating material dispensing device
US7926748B2 (en) * 2008-03-10 2011-04-19 Illinois Tool Works Inc. Generator for air-powered electrostatically aided coating dispensing device
US8496194B2 (en) 2008-03-10 2013-07-30 Finishing Brands Holdings Inc. Method and apparatus for retaining highly torqued fittings in molded resin or polymer housing
US7918409B2 (en) * 2008-04-09 2011-04-05 Illinois Tool Works Inc. Multiple charging electrode
US8225968B2 (en) 2009-05-12 2012-07-24 Illinois Tool Works Inc. Seal system for gear pumps
US10022921B2 (en) * 2013-12-19 2018-07-17 General Electric Company Turbine component patch delivery systems and methods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196465A (en) 1977-12-08 1980-04-01 Gema Ag Apparatebau Electrostatic power coating gun
US5022590A (en) 1989-02-14 1991-06-11 Ransburg-Gema Ag Spray gun for electrostatic spray coating

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3048498A (en) * 1956-03-20 1962-08-07 Ransburg Electro Coating Corp Electrostatic spray coating system
DE2022088C3 (de) * 1970-05-06 1981-04-23 Graco Inc., Minneapolis, Minn. Spritzpistole zum Aufbringen von Schutzschichten aus Kunststoffpulver
US3794243A (en) * 1972-04-26 1974-02-26 Nordson Corp Electrostatic spray apparatus and method
FR2394330A1 (fr) * 1977-06-14 1979-01-12 Air Ind Dispositif d'alimentation en poudre
DE3545885C1 (de) * 1985-12-23 1993-03-04 Kopperschmidt Mueller & Co Elektrostatische Spruehpistole
DE3904438A1 (de) * 1989-02-14 1990-08-16 Gema Ransburg Ag Spruehbeschichtungsgeraet zum elektrostatischen spruehbeschichten
US4995560A (en) * 1989-07-18 1991-02-26 Illinois Tool Works, Inc. Paint hose extension for electrostatic spray gun
CA2055901A1 (fr) * 1990-11-26 1992-05-27 James J. Gimple Revetement automatique utilisant des matieres de revetement conductrices
US5341989A (en) * 1993-02-16 1994-08-30 Nordson Corporation Electrostatic powder spray gun with hose purge adaptor
US5351903A (en) * 1993-04-06 1994-10-04 Russell Mazakas Electrostatic powder paint gun with trigger control variable voltage
US5538189A (en) * 1994-03-04 1996-07-23 Ransburg Corporation Swivel fluid fitting
US5725161A (en) * 1995-02-28 1998-03-10 Nordson Corporation Electrostatic coating system including improved spray gun for conductive paints
DE19546970B4 (de) * 1995-12-15 2006-08-17 Itw Gema Ag Pulversprühvorrichtung zur elektrostatischen Sprühbeschichtung
US6375094B1 (en) * 1997-08-29 2002-04-23 Nordson Corporation Spray gun handle and trigger mechanism
DE19838280A1 (de) * 1998-08-22 2000-02-24 Itw Gema Ag Sprühpistole zum Beschichten von Objekten
DE19838273A1 (de) * 1998-08-22 2000-02-24 Itw Gema Ag Sprühbeschichtungsvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196465A (en) 1977-12-08 1980-04-01 Gema Ag Apparatebau Electrostatic power coating gun
DE2851006C2 (de) 1977-12-08 1985-01-10 Ransburg-Gema AG, St.Gallen Elektrostatische Beschichtungspistole
US5022590A (en) 1989-02-14 1991-06-11 Ransburg-Gema Ag Spray gun for electrostatic spray coating
EP0383031B1 (fr) 1989-02-14 1992-12-23 ITW Gema AG Pistolet pulvérisateur pour le revêtement électrostatique par pulvérisation

Also Published As

Publication number Publication date
CA2373865A1 (fr) 2002-09-09
US6758425B2 (en) 2004-07-06
ES2231378T3 (es) 2005-05-16
EP1238709B1 (fr) 2004-10-20
DE50104199D1 (de) 2004-11-25
DE10111697A1 (de) 2002-09-12
US20020125349A1 (en) 2002-09-12
JP2002263526A (ja) 2002-09-17
CA2373865C (fr) 2007-01-02
ATE279989T1 (de) 2004-11-15
EP1238709A3 (fr) 2003-06-18

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