WO2003006171A3 - Unipolarity powder coating systems including improved tribocharging and corona guns - Google Patents

Unipolarity powder coating systems including improved tribocharging and corona guns Download PDF

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Publication number
WO2003006171A3
WO2003006171A3 PCT/US2002/014254 US0214254W WO03006171A3 WO 2003006171 A3 WO2003006171 A3 WO 2003006171A3 US 0214254 W US0214254 W US 0214254W WO 03006171 A3 WO03006171 A3 WO 03006171A3
Authority
WO
WIPO (PCT)
Prior art keywords
powder
tribocharging
corona
guns
gun
Prior art date
Application number
PCT/US2002/014254
Other languages
French (fr)
Other versions
WO2003006171A2 (en
Inventor
Michael R Sanner
William R Rehman
Harry J Lader
Original Assignee
Nordson Corp
Michael R Sanner
William R Rehman
Harry J Lader
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
Priority claimed from US09/901,162 external-priority patent/US20030038193A1/en
Application filed by Nordson Corp, Michael R Sanner, William R Rehman, Harry J Lader filed Critical Nordson Corp
Priority to AU2002308610A priority Critical patent/AU2002308610A1/en
Priority to CA002450754A priority patent/CA2450754A1/en
Priority to US10/483,111 priority patent/US20040159282A1/en
Publication of WO2003006171A2 publication Critical patent/WO2003006171A2/en
Publication of WO2003006171A3 publication Critical patent/WO2003006171A3/en

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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0418—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces designed for spraying particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • 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
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • 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
    • B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426—Means for supplying shaping gas

Landscapes

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

Abstract

A plurality of unconventional negative tribo-charging materials are described for use as the powder contact surfaces in tribocharging and corona powder spray guns, gun compounds, and powder delivery system components. The invention also provides a short barrel tribo-charging powder spray gun having an interchangeable powder contact insert and nozzle, with turbulence inducing air jets. The invention further provides novel tribocharging and corona gun designs. Improved powder coating systems are made possible wherein, for example, negative tribo guns can be utilized with negative corona guns to coat different parts of the same workpiece in a powder coating system and to realize a repair coating process. Also proived is an inside-out configuration in which pressurized air directs powder coating material outward towards a charging surface. Additional configurations provide air jet induced tribocharging and conventional tribocharging portions combined in a single gun.
PCT/US2002/014254 2001-07-09 2002-05-06 Unipolarity powder coating systems including improved tribocharging and corona guns WO2003006171A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2002308610A AU2002308610A1 (en) 2001-07-09 2002-05-06 Unipolarity powder coating systems including improved tribocharging and corona guns
CA002450754A CA2450754A1 (en) 2001-07-09 2002-05-06 Unipolarity powder coating systems including improved tribocharging and corona guns
US10/483,111 US20040159282A1 (en) 2002-05-06 2002-05-06 Unipolarity powder coating systems including improved tribocharging and corona guns

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US09/901,162 2001-07-09
US09/901,162 US20030038193A1 (en) 2000-07-11 2001-07-09 Unipolarity powder coating systems including improved tribocharging and corona guns
US32761501P 2001-10-05 2001-10-05
US60/327,615 2001-10-05

Publications (2)

Publication Number Publication Date
WO2003006171A2 WO2003006171A2 (en) 2003-01-23
WO2003006171A3 true WO2003006171A3 (en) 2008-03-06

Family

ID=26985965

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/014254 WO2003006171A2 (en) 2001-07-09 2002-05-06 Unipolarity powder coating systems including improved tribocharging and corona guns

Country Status (3)

Country Link
AU (1) AU2002308610A1 (en)
CA (1) CA2450754A1 (en)
WO (1) WO2003006171A2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027730A1 (en) * 1993-05-25 1994-12-08 Trinco Ab Device for use by electrostatic powder coating
US5567468A (en) * 1994-10-11 1996-10-22 Schonbek Worldwide Lighting Inc. Method and apparatus for applying powder coatings to surfaces
US5622313A (en) * 1995-03-03 1997-04-22 Nordson Corporation Triboelectric powder spray gun with internal discharge electrode and method of powder coating
EP0795589A1 (en) * 1996-03-12 1997-09-17 Kao Corporation Powder coating
DE19909805C1 (en) * 1999-03-05 2000-10-26 Fraunhofer Ges Forschung Electrostatic powder coating method uses triboelectric and corona charge for electrostatic charge of coating powder which is a mixture of at least 2 different materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027730A1 (en) * 1993-05-25 1994-12-08 Trinco Ab Device for use by electrostatic powder coating
US5567468A (en) * 1994-10-11 1996-10-22 Schonbek Worldwide Lighting Inc. Method and apparatus for applying powder coatings to surfaces
US5622313A (en) * 1995-03-03 1997-04-22 Nordson Corporation Triboelectric powder spray gun with internal discharge electrode and method of powder coating
EP0795589A1 (en) * 1996-03-12 1997-09-17 Kao Corporation Powder coating
DE19909805C1 (en) * 1999-03-05 2000-10-26 Fraunhofer Ges Forschung Electrostatic powder coating method uses triboelectric and corona charge for electrostatic charge of coating powder which is a mixture of at least 2 different materials

Also Published As

Publication number Publication date
AU2002308610A1 (en) 2003-01-29
AU2002308610A8 (en) 2008-04-24
WO2003006171A2 (en) 2003-01-23
CA2450754A1 (en) 2003-01-23

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