GB1455404A - Electrostatic spray gun - Google Patents

Electrostatic spray gun

Info

Publication number
GB1455404A
GB1455404A GB1738774A GB1738774A GB1455404A GB 1455404 A GB1455404 A GB 1455404A GB 1738774 A GB1738774 A GB 1738774A GB 1738774 A GB1738774 A GB 1738774A GB 1455404 A GB1455404 A GB 1455404A
Authority
GB
United Kingdom
Prior art keywords
nozzle
air
paint
spray
gun
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
Application number
GB1738774A
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 SE7305599A external-priority patent/SE386841B/en
Priority claimed from SE7313505A external-priority patent/SE392575B/en
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
Publication of GB1455404A publication Critical patent/GB1455404A/en
Expired legal-status Critical Current

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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
    • B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
    • 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

Landscapes

  • Electrostatic Spraying Apparatus (AREA)

Abstract

1455404 Spray producers ATLAS COPCO AB 19 April 1974 [19 April 1973 4 Oot 1973] 17387/74 Heading B2F An electrostatic spray gun for discharging liquid paint which is dispersed by air streams, comprises a nozzle 18 through which paint is emitted through a discharge orifice 25 controlled by a manually operable valve comprising an axially movable electrically insulating rod 32 cooperating with a seat 34 in the nozzle 18, the nozzle 18 comprising a substantially non- conductive matrix, e.g. PTFE plastics, in which there are embedded electrically conductive particles, e.g. bronze or graphite, which form the electrodes of the spray gun, the nozzle 18 being connected to a high voltage source via screws 43, 42 and an impedance 41. The forwardly extending end 22 of nozzle 18 forms an annular surface 26 surrounding the discharge orifice and, in conjunction with a coaxial air nozzle 17, forms an annular gap 24 therebetween. Air is emitted through the gap 24 and through holes 27 in the nozzle 17 to atomize the paint, the spray being flattened by air emitted from passages 30 in air horns 31. The supply of air is simultaneously controlled on reciprocation of the rod 32 by means of a valve (not shown), the air valve and the rod 32 being simultaneously operated by a trigger (46), Figure 1, (not shown). The nozzle 18 is of sintered material and is machined after sintering to obtain the electrodes on its surface. In another embodiment, Figures 3, 4 (not shown), a sintered paint nozzle (55) is partially enclosed within an outer non-conducting member (56), the air in this embodiment not being carried along the surface of the paint nozzle (55) but along the member (56), to reduce the risk of sparking. One or more needle electrodes (58), projecting forwardly from the discharge orifice 25, may be provided, the electrode(s) (58) being retained between the nozzle (55) and member (56). The nozzle (55) and member (56) are press-fittted together. The electrode(s) (58) further reduce the risk of spanking since they form corona discharges instead of sparks. The invention may also be applied to an airless spray-gun or a powder spray-gun.
GB1738774A 1973-04-19 1974-04-19 Electrostatic spray gun Expired GB1455404A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7305599A SE386841B (en) 1973-04-19 1973-04-19 ELECTRIC STATUS SPRAYER
SE7313505A SE392575B (en) 1973-10-04 1973-10-04 ELECTRIC STATUS SPRAYER

Publications (1)

Publication Number Publication Date
GB1455404A true GB1455404A (en) 1976-11-10

Family

ID=26656363

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1738774A Expired GB1455404A (en) 1973-04-19 1974-04-19 Electrostatic spray gun

Country Status (3)

Country Link
DE (1) DE2418604A1 (en)
FR (1) FR2226214B1 (en)
GB (1) GB1455404A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816850A1 (en) * 1978-04-18 1979-10-31 Mueller Ernst & Co ELECTROSTATIC POWDER SPRAY GUN
DE3708656A1 (en) * 1986-03-19 1987-09-24 Graco Inc ELECTROSTATIC SPRAY GUN
WO1991006376A1 (en) * 1989-11-06 1991-05-16 Frederick David Haig Spray gun with corona and tubular electrodes
WO2022089116A1 (en) * 2020-10-30 2022-05-05 宁波必达机械制造有限公司 Air brush head structure

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419112A1 (en) * 1978-03-08 1979-10-05 Air Ind Electrostatic spray gun jet system - has low pressure air jet rotated around central high pressure liq. jet
US4497447A (en) * 1983-05-23 1985-02-05 Graco, Inc. Energy damping device for spray gun
DE59004556D1 (en) * 1990-02-16 1994-03-24 Wagner Gmbh J Method of operating an electrostatic compressed air paint spray gun.
DE4240568C2 (en) * 1992-12-02 1996-08-08 Atochem Elf Sa Semiconductive charging electrode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816850A1 (en) * 1978-04-18 1979-10-31 Mueller Ernst & Co ELECTROSTATIC POWDER SPRAY GUN
DE3708656A1 (en) * 1986-03-19 1987-09-24 Graco Inc ELECTROSTATIC SPRAY GUN
WO1991006376A1 (en) * 1989-11-06 1991-05-16 Frederick David Haig Spray gun with corona and tubular electrodes
WO2022089116A1 (en) * 2020-10-30 2022-05-05 宁波必达机械制造有限公司 Air brush head structure

Also Published As

Publication number Publication date
FR2226214B1 (en) 1980-08-08
FR2226214A1 (en) 1974-11-15
DE2418604A1 (en) 1974-12-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee