US3811620A - Head for powder spraying gun - Google Patents

Head for powder spraying gun Download PDF

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Publication number
US3811620A
US3811620A US00305734A US30573472A US3811620A US 3811620 A US3811620 A US 3811620A US 00305734 A US00305734 A US 00305734A US 30573472 A US30573472 A US 30573472A US 3811620 A US3811620 A US 3811620A
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US
United States
Prior art keywords
powder
air stream
deflection
discharge head
deflection part
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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
US00305734A
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English (en)
Inventor
O Gebhardt
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.)
MUELLER E KG
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MUELLER E KG
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Filing date
Publication date
Application filed by MUELLER E KG filed Critical MUELLER E KG
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Publication of US3811620A publication Critical patent/US3811620A/en
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    • 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
    • B05B7/14—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 designed for spraying particulate materials
    • B05B7/1481—Spray pistols or apparatus for discharging particulate material
    • B05B7/1486—Spray pistols or apparatus for discharging particulate material for spraying particulate material in dry state
    • 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

Definitions

  • the subject-matter of the invention is a head for powder spraying. guns such as used, for example, for coating workpieces with plastics powder or ceramic powder.
  • a variety of heads for powder spraying guns have already been suggested. They aim first of all to attain a favorable exit stream of a: powder-air mixture with a view to being able to coat the powder uniformly even on considerably articulated surfaces of workpieces.
  • the present invention aims at suggesting a head for powder spraying guns which avoids the drawbacks of the devices known so far and which makes it possible to produce a uniform powder-air stream on the workpiece even in special form, for instance also as regards breadth.
  • the present invention solves the problem in such a way that there is placed in front of the exit orifice of the powder-air gun a deflection part, for the powder-air stream, which deflects the stream by about 180 and that the deflected stream hits a breaker plate placed on the exit tube inwardly of the exit end, which deflects the stream, in its turn, in the direction of the workpiece.
  • the distance of the deflection part may be adjustable relative to the exit orifice.
  • the distance of the breaker plate is likewise adjustable relative to the deflection part.
  • the surface formation in the curve can be harmonized aerodynamically with a blow-off angle. If one makes a shrewd choice of the curve of the breaker plate, it is possible to attain, for instance, an appropriate angle of outlet from the gun in the direction of the workpiece.
  • the diameter of the deflection part and of the breaker plate are of prime importance for the passage of the powderair mixture and for the angle of outlet.
  • deflection part andfor the breaker plate for example,'an oval or elliptical form for the purpose of producing a relatively broad stream.
  • the external border of the deflection part can be located even in the proximity of the breaker plate. This way of proceeding permits to produce varied stream forms as well as varied stream speeds in the direction of the workpiece.
  • plastics of the group of polytetrafluorethylenes or plastics of the group of copolymeres derived from tetrafluorethylene, hexafluorpropylenes or of similar groups the parts which come in contact with powder, for instance the surfaces of the deflection plate and of the breaker plate or to make these parts directly of the aforementioned plastics.
  • FIG. 1 is a schematic longitudinal. sectional view of the head of a powder spraying gun
  • FIG. 2 is a plan view of the head of a powder spraying gun with a circular deflection part and a circular breaker plate;
  • FIG. 3 is a plan view of the powder spraying gun with an oval deflection part and an oval breaker plate;
  • FIG. 4 is a schematic partial longitudinal sectional view of the head of a powder spraying gun wherein a stream of the powder-air mixture can emerge therefrom directly forwardly.
  • FIG. 1 represents an outlet or discharge tube of a powder spraying gun I, in which a powder-air mixture under pressure flows outwardly in the direction of arrow 2.
  • a deflection part 4 which is mounted by means of the mounting piece 9, at the outlet orifice 3.
  • the surface 14 of part 4 deflects the stream of the powder-air mixture substantially in the direction of arrow 5, so that the mixture impinges on the surface 6 of the breaker plate 7, which deflects the stream of the powder-air mixture in the direction of arrow 8 toward the workpiece 15.
  • the deflection part can be adjusted in the direction of arrow 13 whereas it is possible to render adjustable the breaker plate 7 in the direction of arrow 12.
  • FIG. 2 represents a plan view of a powder spraying gun to which are applied a circular deflection part 4 and a circular breaker plate 7.
  • FIG. 3 represents a plan view of a powder spraying gun to which are applied an oval deflection part and an oval breaker plate 11.
  • FIG. 4 represents a schematic partial section of a head of a special type where the adjustable deflection part 16 is provided with holes 17 which cooperate with corresponding holes in a fixed device 18, where it is possible to enlarge or reduce the passage orifices so that a selected part of the powder-air mixture can be discharged directly forward in the direction of arrow 20.
  • the holes 17 are discernible also in FIG. 2. It is possible to obtain in this way a combined conveying of powder to workpiece with the gun operating with deflection and/or in a straightforward manner.
  • the invention offers the additional advantage that, when operating in accordance with the suggested directives and applying an electrostatic electrode, it is possible to place the electrodes 21 of the high-tension part 22 further inwardly, for example on a level with the breaker plate 7 as is seen in FIG. 1. This will contribute to diminish the detonation-danger.
  • an improved discharge head comprising, in combination, a deflection part, for the powder-air stream, mounted on said discharge tube in axially outwardly spaced relation to said exit orifice and in the path of the discharged powder-air stream; said deflection part having a first deflection surface on which the powder-air stream impinges and which deflects the powder-air stream impinging thereon through an angle of substantially 180 to flow axially inwardly in surrounding relation to said discharge tube; and a breaker plate mounted on said discharge tube axially inwardly of said exit orifice and having a second deflecting surface on which the initially deflected powder-air stream impinges and which re-deflects the powder-air stream impinging thereon to flow axially outwardly, as a conically diverging spray, toward a workpiece to be coated.
  • An improved discharge head as claimed in claim 1, in which the axially spaced relation of said deflection part to said exit orifice is adjustable.
  • An improved discharge head as claimed in claim 1, in which said breaker plate is adjustable axially with respect to said deflection part.
  • An improved discharge head as claimed in claim 1, in which the surface of said exit orifice and said first deflection surface are aerodynamically coordinated with each other to deflect the powder-air stream impinging on said first deflection surface through an angle of substantially 5.
  • An improved discharge head as claimed in claim 1, in which said first deflection surface is a curved surface having a curvature such as to deflect the powderair stream impinging thereon through an angle of substantially 180.
  • An improved discharge head as claimed in claim 1, in which said deflection part and said breaker plate are circular in plan.
  • An improved discharge head as claimed in claim 1, in which said deflection part and said breaker plate are substantially elliptical in plan.
  • An improved discharge head as claimed in claim 1, in which those parts of said deflection part and said breaker plate which come in contact with the powder are formed of plastics of the group consisting of polytetrafluorethylenes and 'copolymers of tetrafluorethylene and hexafluorpropylenes.
  • An improved discharge head as claimed in claim 1, in which said deflection part comprises two superposed plate portions each formed with apertures adjustable into alignment with each other by relative angular movement of the two plate portions to selectively control and block discharge of a portion of the powderair stream axially outwardly without deflection.

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  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)
US00305734A 1971-12-20 1972-11-13 Head for powder spraying gun Expired - Lifetime US3811620A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2163111A DE2163111A1 (de) 1971-12-20 1971-12-20 Kopf fuer pulverspruehpistole

Publications (1)

Publication Number Publication Date
US3811620A true US3811620A (en) 1974-05-21

Family

ID=5828531

Family Applications (1)

Application Number Title Priority Date Filing Date
US00305734A Expired - Lifetime US3811620A (en) 1971-12-20 1972-11-13 Head for powder spraying gun

Country Status (6)

Country Link
US (1) US3811620A (enrdf_load_stackoverflow)
JP (1) JPS4869836A (enrdf_load_stackoverflow)
DE (1) DE2163111A1 (enrdf_load_stackoverflow)
FR (1) FR2170416A5 (enrdf_load_stackoverflow)
IT (1) IT971278B (enrdf_load_stackoverflow)
SE (1) SE370639B (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897003A (en) * 1974-02-19 1975-07-29 Protectoseal Co Blowout nozzle
US4676438A (en) * 1984-09-20 1987-06-30 Nelson Irrigation Corporation Furrow irrigation bubbler device and spray head conversion assembly utilized therewith
USH458H (en) 1986-09-29 1988-04-05 The Standard Oil Company Pressure-reducing spray nozzle and use thereof in a froth flotation method
US4832264A (en) * 1983-06-24 1989-05-23 Peretz Rosenberg Rotary sprinklers
US5564825A (en) * 1992-12-02 1996-10-15 Shrader Canada Limited Integral inlet valve and mixer to promote mixing of fluids in a tank
EP0835692A3 (de) * 1996-10-11 2001-04-25 Hugo Brennenstuhl GmbH & Co. KG Vorrichtung zum Aufbringen von Beschichtungsgut auf einen Gegenstand
US6457470B1 (en) * 1992-12-22 2002-10-01 Electrosols Ltd. Dispensing device
US6880554B1 (en) * 1992-12-22 2005-04-19 Battelle Memorial Institute Dispensing device
US20070163575A1 (en) * 2005-12-30 2007-07-19 Rojas Antonio M Jr Nebulizer
US20110011394A1 (en) * 2007-12-14 2011-01-20 Edwards David A Delivering aerosolizable food products
US20230173440A1 (en) * 2020-04-21 2023-06-08 Tokyo Institute Of Technology Mixing nozzle and contaminated gas purification device using mixing nozzle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03109159U (enrdf_load_stackoverflow) * 1990-02-23 1991-11-08
DE4015009C1 (en) * 1990-05-10 1991-10-24 Mtu Muenchen Gmbh Flame-spraying torch for powdered materials - has material supply channel contg. helically formed plates
JPH0630286Y2 (ja) * 1990-08-24 1994-08-17 日本ドライケミカル株式会社 低圧式二酸化炭素消火装置用ノズル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1999116A (en) * 1931-04-02 1935-04-23 Bryce Ltd Internal combustion engine
US2545951A (en) * 1946-04-24 1951-03-20 Specialties Dev Corp Discharging fire-extinguishing media
US2566324A (en) * 1949-11-16 1951-09-04 Specialties Dev Corp Discharge device for fluids
US3521815A (en) * 1969-05-07 1970-07-28 Imre Szasz Guns for the electrostatic spray coating of objects with a powder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1999116A (en) * 1931-04-02 1935-04-23 Bryce Ltd Internal combustion engine
US2545951A (en) * 1946-04-24 1951-03-20 Specialties Dev Corp Discharging fire-extinguishing media
US2566324A (en) * 1949-11-16 1951-09-04 Specialties Dev Corp Discharge device for fluids
US3521815A (en) * 1969-05-07 1970-07-28 Imre Szasz Guns for the electrostatic spray coating of objects with a powder

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897003A (en) * 1974-02-19 1975-07-29 Protectoseal Co Blowout nozzle
US4832264A (en) * 1983-06-24 1989-05-23 Peretz Rosenberg Rotary sprinklers
US4676438A (en) * 1984-09-20 1987-06-30 Nelson Irrigation Corporation Furrow irrigation bubbler device and spray head conversion assembly utilized therewith
USH458H (en) 1986-09-29 1988-04-05 The Standard Oil Company Pressure-reducing spray nozzle and use thereof in a froth flotation method
US5564825A (en) * 1992-12-02 1996-10-15 Shrader Canada Limited Integral inlet valve and mixer to promote mixing of fluids in a tank
US6457470B1 (en) * 1992-12-22 2002-10-01 Electrosols Ltd. Dispensing device
US6880554B1 (en) * 1992-12-22 2005-04-19 Battelle Memorial Institute Dispensing device
US20050235986A1 (en) * 1992-12-22 2005-10-27 Battelle Memorial Institute Dispensing device
EP0835692A3 (de) * 1996-10-11 2001-04-25 Hugo Brennenstuhl GmbH & Co. KG Vorrichtung zum Aufbringen von Beschichtungsgut auf einen Gegenstand
US20070163575A1 (en) * 2005-12-30 2007-07-19 Rojas Antonio M Jr Nebulizer
US20110011394A1 (en) * 2007-12-14 2011-01-20 Edwards David A Delivering aerosolizable food products
US9179691B2 (en) * 2007-12-14 2015-11-10 Aerodesigns, Inc. Delivering aerosolizable food products
US20230173440A1 (en) * 2020-04-21 2023-06-08 Tokyo Institute Of Technology Mixing nozzle and contaminated gas purification device using mixing nozzle

Also Published As

Publication number Publication date
IT971278B (it) 1974-04-30
SE370639B (enrdf_load_stackoverflow) 1974-10-28
DE2163111A1 (de) 1973-07-05
JPS4869836A (enrdf_load_stackoverflow) 1973-09-21
FR2170416A5 (enrdf_load_stackoverflow) 1973-09-14

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