GB891449A - Improved method of and apparatus for electrostatic spray coating - Google Patents
Improved method of and apparatus for electrostatic spray coatingInfo
- Publication number
- GB891449A GB891449A GB30686/60A GB3068660A GB891449A GB 891449 A GB891449 A GB 891449A GB 30686/60 A GB30686/60 A GB 30686/60A GB 3068660 A GB3068660 A GB 3068660A GB 891449 A GB891449 A GB 891449A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gun
- paint
- pipe
- high voltage
- wire
- 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
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
- B05B5/16—Arrangements for supplying liquids or other fluent material
-
- 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
Abstract
In an electrostatic coating apparatus a pneumatic spray gun 12 is connected to one side of a high voltage source and the workpiece is connected to the other, and the gun, which is of metal, is encased in a dielectric material 30 having an opening for the gun nozzle 34, so that charge leakage is concentrated at the nozzle. The air nozzle 47 of the gun is of dielectric material. The casing, which is an epoxy resin, is moulded around the gun and surrounds nylon pipes 48-50 supplying, respectively, atomizing air, pressure air for operating the paint valve 20, Fig. 5, and paint. The end of a high voltage supply lead 15 is covered by a nylon tube 44 also surrounded by the casing. A part of the charge leakage of the gun is caused to escape through the paint in the feed pipe 50, and for this purpose one end of a wire conductor 67, Fig. 5, extends into the bore of a nylon pipe 54 connected by metallic parts 52, 53 to the pipe 50. The wire is connected to the opposite earthed side of the high voltage source by means of a housing 19, Fig. 2, and the opposite end of <PICT:0891449/III/1> <PICT:0891449/III/2> <PICT:0891449/III/3> the wire conductor is attached to a drum within the housing and rotatable by a knob 66 to thereby adjust the position of the end of the wire in the pipe 54; thus the charge leakage through the paint is adjusted. In Fig. 6 a pneumatic metallic spray gun 70 is mounted within an epoxy resin casing 71 into which air pipes and a high voltage connector 83 are fed. Paint is supplied to the gun via pipe 91, the bore of a nylon member 92, a spiral passage 96 in a dielectric insert 95, a bored metallic member 100 and a metallic tube 102. To provide a charge leakage through the paint an earthed spring steel spiral wire 108, attached at one end to a metal rod 109, and of a diameter smaller than that of the spiral passage, is threaded into that passage by an amount which is adjusted by turning the rod 109 by a knob 111.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US841140A US3031145A (en) | 1959-09-21 | 1959-09-21 | Electrostatic spray painting apparatus |
| US20453A US3037703A (en) | 1959-09-21 | 1960-04-06 | Electrostatic coating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB891449A true GB891449A (en) | 1962-03-14 |
Family
ID=26693453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30686/60A Expired GB891449A (en) | 1959-09-21 | 1960-09-06 | Improved method of and apparatus for electrostatic spray coating |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US3031145A (en) |
| DE (1) | DE1246478B (en) |
| GB (1) | GB891449A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3056557A (en) * | 1959-07-16 | 1962-10-02 | Arvid C Walberg | Spray gun for electrostatic coating |
| US3219013A (en) * | 1962-05-04 | 1965-11-23 | Gen Motors Corp | Precharging device for electrostatic painting apparatus |
| US3292860A (en) * | 1963-10-28 | 1966-12-20 | Ransburg Electro Coating Corp | Electrostatic spray coating apparatus |
| US3271903A (en) * | 1965-04-06 | 1966-09-13 | William C Gregory | Maintaining the resistivity of insulating members in energized electric equipment |
| US3251551A (en) * | 1966-01-19 | 1966-05-17 | H G Fischer & Company | Electrostatic coating system |
| US3253782A (en) * | 1966-02-02 | 1966-05-31 | Fischer & Co H G | Spray gun |
| US3367578A (en) * | 1966-12-27 | 1968-02-06 | Ransburg Electro Coating Corp | Electrostatic spray coating apparatus |
| US4139155A (en) * | 1977-05-25 | 1979-02-13 | Nordson Corporation | Electrostatic spray gun with isolating paint conduit |
| US4986471A (en) * | 1989-07-03 | 1991-01-22 | General Dynamics Corp., Air Defense Systems Div. | Remote indicator light and safety shield for electrostatic spray gun |
| DE102012001563B4 (en) | 2012-01-27 | 2019-05-09 | Dürr Systems Ag | Paint booth with a coating agent line and corresponding production method for the coating agent line |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB813388A (en) * | 1955-12-19 | 1959-05-13 | Metallurg Chemists Ltd | Electrostatic crop dressing apparatus |
| US1854475A (en) * | 1920-11-27 | 1932-04-19 | Littlefield Edgar Earle | Method for electrically charging fluids |
| US2302185A (en) * | 1940-07-27 | 1942-11-17 | Union Oil Co | Electrified spray apparatus |
| BE519260A (en) * | 1952-04-18 | |||
| US2739838A (en) * | 1955-01-17 | 1956-03-27 | Sedlacsik John | Paint spray apparatus |
| US2784350A (en) * | 1955-04-04 | 1957-03-05 | Sedlacsik John | Paint spray apparatus, including insulated supply pipe |
| US2913186A (en) * | 1955-12-01 | 1959-11-17 | Jr John Sedlacsik | Electrostatic spray coating apparatus and method |
| FR1164409A (en) * | 1957-01-15 | 1958-10-09 | Method and apparatus for electrostatic coating of various surfaces |
-
1959
- 1959-09-21 US US841140A patent/US3031145A/en not_active Expired - Lifetime
-
1960
- 1960-04-06 US US20453A patent/US3037703A/en not_active Expired - Lifetime
- 1960-09-06 GB GB30686/60A patent/GB891449A/en not_active Expired
- 1960-09-20 DE DEG30523A patent/DE1246478B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3037703A (en) | 1962-06-05 |
| US3031145A (en) | 1962-04-24 |
| DE1246478B (en) | 1967-08-03 |
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