US3399814A - Powder feeder with rotary, axially movable flow controller - Google Patents

Powder feeder with rotary, axially movable flow controller Download PDF

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Publication number
US3399814A
US3399814A US582569A US58256966A US3399814A US 3399814 A US3399814 A US 3399814A US 582569 A US582569 A US 582569A US 58256966 A US58256966 A US 58256966A US 3399814 A US3399814 A US 3399814A
Authority
US
United States
Prior art keywords
valve
powder
sleeve
stem
outlet
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 - Lifetime
Application number
US582569A
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English (en)
Inventor
Currie William Albert
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.)
Messrs Berk Ltd
Original Assignee
Messrs Berk Ltd
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 Messrs Berk Ltd filed Critical Messrs Berk Ltd
Application granted granted Critical
Publication of US3399814A publication Critical patent/US3399814A/en
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
    • 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
    • B05B7/1404—Arrangements for supplying 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
    • 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
    • B05B7/16—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 incorporating means for heating or cooling the material to be sprayed
    • B05B7/20—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 incorporating means for heating or cooling the material to be sprayed by flame or combustion
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying

Definitions

  • a powder feeding device includes a hopper having a bottom opening provided with a valve seat.
  • a conical valve member coaxial with the valve seat is provided with a depending axially bored valve stem slida'bly coaxially supported in a sleeve and delineating a vertical passageway therewith, the top of the sleeve being provided with a bottom stop for the valve and being vertically adjustable.
  • the bottom of the stem is connected to a source of compressed air and the stem is provided with an outlet port between its ends to permit the flow of air between the tube and sleeve to prevent the deposit of powder therein.
  • This invention relates to a powder feeding device.
  • An object of the invention is to provide such a device for use with flame spraying equipment for spraying metal, plastics, ceramic powders and the like, the device having an outlet from a powder container which can be opened or closed in a simple manner and yet permits the rate of discharge of powder through the outlet to be adjustably pre-set as desired.
  • a powder feeding device comprises a container for powder, an outlet opening leading from the container, a valve which can be opened to permit the discharge of powder from the container or closed to terminate such discharge, and a flow rate control member the setting of which is adjustable to determine the area of the outlet opening and hence the rate of discharge of powder.
  • the valve can conveniently be a conical member movable to and from a valve seating provided at said outlet opening, and a pre-determined fixed point. In operation of the device it will be in either one of these positions, namely at the valve seating thereby closing the outlet opening of the powder container, or at a fixed point from the valve seating which is preselected as the fully open position allowing powder to escape from said outlet end without exerting a controlling effect upon the rate of powder discharge from the container.
  • a flow-rate control member is arranged either above or below the on/off valve, coaxially therewith, and can be moved up and down with respect to the on/ofi valve independently of it.
  • the position of the flow rate control member is set to give the required rate of discharge of powder from the container.
  • the on/off valve is moved to its fully open position thus allowing powder to fall freely through the outlet aperture at a rate determined by the position of the flow rate control member.
  • FIGURE 1 is a diagram illustrating a powder feeding device according to the invention
  • FIGURE 2 is a sectional view of a modification.
  • a device for controlling the supply of powder to powder spraying equipment comprises a powder outlet tube 1 which leads out of the bottom of a container 2 for powder.
  • This outlet tube 1 has a cylindrical valve Cir seat 3 at its lower end defining an outlet aperture for the powder.
  • valve stem 4 The lower end portion 7 of the valve stem 4 is screwthreaded and is screwed into a connecting nut 8 in a fixed part-9 of the device.
  • the valve stem can therefore be raised and lowered by rotation in the nut thereby to open or close the outlet aperture.
  • a control knob or wheel 10 is provided to rotate the valve stem 4.
  • the rate of discharge of powder is determined by the setting of the valve control sleeve 11.
  • the largest area between the conical portion 5 of the valve stem 4 and the valve seat 3 will be possible when the flow rate control member 14 and sleeve 11 are at their lowermost position and the smallest area will be when the flow rate control member 14 and sleeve 11 are at their uppermost position.
  • FIGURE 2 illustrates a modification in which the valve stem or needle 4 is hollow and contains a co-axial air supply tube 15.
  • One end of the tube 15 leads to an air outlet aperture 16 in the wall of the needle or stem 4 and the other end leads into an air connector union 17 provided with a ripple 18 receiving a hose 19 by which air under pressure can be supplied to the air tube 15.
  • Air will pass from the tube 15 through aperture 16 between stem or needle 4 and the valve control sleeve 11 and then flow out between the ends of the sleeve and the stem or needle.
  • This arrangement prevents powder becoming packed between the stem or needle and the sleeve. Powder which has discharged from the tube 1 will leave the device through an outlet union 20.
  • a modified flow rate control member has a frusto-conical shaped upper end and supported on a stern of smaller diameter than the largest diameter of the frusto-conical shaped end.
  • This control member is interposed coaxially between the on/off valve and the outlet aperture for the powder.
  • the largest diameter of the flow rate control member is such as to allow the member to enter the outlet aperture without resulting in closure of said aperture.
  • the stem of the flow rate control member is surrounded by, and is movable within, a valve control sleeve.
  • This sleeve has an external screw thread engaged in a cooperating fixed part of the device so that the position of the sleeve can be adjusted with respect to the top and bottom of the stern of the flow rate control member.
  • the upper part of the sleeve passes through a suitable gland or packing and the top of the sleeve has an annular plate the diameter of which is greater than that of the outlet end of the powder container. Said plate acts as the on/ oil valve since it is adapted to close the outlet end of the powder container when in contact therewith.
  • the on/off valve may comprise a cup-shaped member which is capable of closing the outlet aperture of the powder container but at the same time is able to house the frusto-conical upper end of the flow rate control member.
  • the flow rate control member is raised or lowered until the desired outlet aperture is obtained, the on/off valve is then lowered by means of the valve control sleeve, ensuring that it is low enough to avoid imperance of powder flowing out from the outlet aperture.
  • the on/off valve is raised to the closed position, and the device may then be re-used at will for similar coating operations without need for adjusting the flow rate control member.
  • a powder feed device comprising a powder source having an outlet opening, a valve seat registering with said opening an axially linearly movable valve stem coaxial with said valve seat and provided with an axial bore having an outlet opening between its ends and an inlet opening, a tapered valve member mounted on an end of said stem and movable therewith toward and away from said valve seat, a longitudinal sleeve coaxially engaging said stem and defining a, linearly extending air passageway therewith and provided with a valve stop end portion confronting said valve member, means for axially adjusting said sleeve to limit the axial movement of said valve member from said valve seat and control the open position thereof, and means for connecting said bore inlet opening to a source of compressed air whereby air flows through said stem bore and the space between said stem and said sleeve.
  • valve member has a conical face.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Nozzles (AREA)
US582569A 1965-09-28 1966-09-28 Powder feeder with rotary, axially movable flow controller Expired - Lifetime US3399814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41245/65A GB1162672A (en) 1965-09-28 1965-09-28 Improvements relating to a Powder Feeder

Publications (1)

Publication Number Publication Date
US3399814A true US3399814A (en) 1968-09-03

Family

ID=10418805

Family Applications (1)

Application Number Title Priority Date Filing Date
US582569A Expired - Lifetime US3399814A (en) 1965-09-28 1966-09-28 Powder feeder with rotary, axially movable flow controller

Country Status (5)

Country Link
US (1) US3399814A (en, 2012)
DE (1) DE1621809B1 (en, 2012)
FR (1) FR1508144A (en, 2012)
GB (1) GB1162672A (en, 2012)
NL (1) NL6613640A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113522555A (zh) * 2021-08-26 2021-10-22 湖南森焱科技有限公司 喷粉浓度可控且均匀的喷粉装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128348A1 (de) * 1981-07-17 1983-02-03 Bühler, Eugen, Dipl.-Ing., 8871 Burtenbach Einrichtung zur herstellung von formlingen aus einer rieselfaehigen masse stichwort: "vorverdichtung im schiesskopf"
US4569161A (en) * 1983-11-03 1986-02-11 Pennwalt Corporation Pneumatic powder metering apparatus with improved powder throttling mechanism
FR2577447B1 (fr) * 1985-02-15 1988-06-03 Devilbiss Toussaint Dispositif de reglage de debit par pointeau et application a un appareil de pulverisation pneumatique a reglage rapide de forme de jet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1393615A (en) * 1920-05-01 1921-10-11 Irving J Foltz Regulator
US2010088A (en) * 1933-05-15 1935-08-06 Carl J Kohler Pressure reducing valve
US2119643A (en) * 1934-11-07 1938-06-07 Mendl Viktor Pressure-operated diffuser of toilet-liquids
US2180468A (en) * 1937-10-11 1939-11-21 Hochstim Samuel Dispenser
US2761647A (en) * 1951-05-02 1956-09-04 Ivan V Zeck Valve for internal combustion engine carburetor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE266264C (en, 2012) *
US2526735A (en) * 1945-12-06 1950-10-24 Union Carbide & Carbon Corp Powder dispensing apparatus
DE891481C (de) * 1951-06-22 1953-09-28 Schori Metallising Process Ltd Geraet zum Zerstaeuben von pulverisiertem Material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1393615A (en) * 1920-05-01 1921-10-11 Irving J Foltz Regulator
US2010088A (en) * 1933-05-15 1935-08-06 Carl J Kohler Pressure reducing valve
US2119643A (en) * 1934-11-07 1938-06-07 Mendl Viktor Pressure-operated diffuser of toilet-liquids
US2180468A (en) * 1937-10-11 1939-11-21 Hochstim Samuel Dispenser
US2761647A (en) * 1951-05-02 1956-09-04 Ivan V Zeck Valve for internal combustion engine carburetor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113522555A (zh) * 2021-08-26 2021-10-22 湖南森焱科技有限公司 喷粉浓度可控且均匀的喷粉装置

Also Published As

Publication number Publication date
FR1508144A (en, 2012) 1968-03-11
GB1162672A (en) 1969-08-27
NL6613640A (en, 2012) 1967-03-29
DE1621809B1 (de) 1971-02-25

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