EP0767006B1 - Verfahren und Einrichtung zum Zuführen von Pulver zu einer Pulversprüheinrichtung - Google Patents

Verfahren und Einrichtung zum Zuführen von Pulver zu einer Pulversprüheinrichtung Download PDF

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Publication number
EP0767006B1
EP0767006B1 EP96115512A EP96115512A EP0767006B1 EP 0767006 B1 EP0767006 B1 EP 0767006B1 EP 96115512 A EP96115512 A EP 96115512A EP 96115512 A EP96115512 A EP 96115512A EP 0767006 B1 EP0767006 B1 EP 0767006B1
Authority
EP
European Patent Office
Prior art keywords
powder
chamber
nozzle
air
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
EP96115512A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0767006A1 (de
Inventor
Gunter Dr. Börner
Hans-Christopher Dr.Rer.Nat. Nienburg
Helmut Prof. Dr. Böhme
Jörg Dr.rer.nat. Sopka
Wolfgang Prof. Dr. Kleber
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.)
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
Original Assignee
ABB Research Ltd Switzerland
ABB Research Ltd Sweden
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 ABB Research Ltd Switzerland, ABB Research Ltd Sweden filed Critical ABB Research Ltd Switzerland
Publication of EP0767006A1 publication Critical patent/EP0767006A1/de
Application granted granted Critical
Publication of EP0767006B1 publication Critical patent/EP0767006B1/de
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
    • 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
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/1627—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
    • B05B1/1636—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements
    • B05B1/1645—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements the outlets being rotated during selection
    • B05B1/1654—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements the outlets being rotated during selection about an axis parallel to the liquid passage in the stationary valve element
    • 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
    • B05B5/16—Arrangements for supplying liquids or other fluent material
    • B05B5/1691—Apparatus to be carried on or by a person or with a container fixed to the discharge device
    • 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
    • B05B7/1413—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising a container fixed to the discharge device
    • 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
    • B05B5/1683—Arrangements for supplying liquids or other fluent material specially adapted for particulate materials

Definitions

  • the invention relates to a method for spraying a fluidized powder according to the preamble of claim 1.
  • the invention also relates to a facility for performing the method.
  • Such a method and an associated device are known from US-A-5 018 910 known.
  • a closed powder container with a porous fluid base as input to a mixing chamber in which a gas jet is used to counter pressure drop directed to the powder container to increase the removable Amount of powder is generated.
  • the powder container is a two-chamber device, whereby the fludged powder is removed from the mixing chamber above the fluid floor fed and forwarded from there to a coating arrangement.
  • a corresponding method and an associated device are also from the DE-A 12 34 802 and are known for example for electrostatic painting used.
  • the known device for powder spraying has a first Chamber into which an additional compressed air is introduced, which via a frit (a Pore septum) enters a second chamber.
  • the second chamber becomes an in Air-floating powder is fed via a line and with that from the frit escaping and countercurrent additional compressed air swirled further.
  • a electrical charging of the powder particles emerging from the second chamber takes place with the help of electrodes arranged in the area of a powder / air outlet opening and connected to a high voltage generator and an electrostatic Form field.
  • the known device still worked with a third supply line that guides air and in the powder / air outlet area improves the powder / air output.
  • the powder / air outlet is always open; the spraying process is controlled via a control or regulation of the flow rates in air and the Air / powder mixture.
  • the invention has for its object a method and a device for Specify powder spraying, with which a high, easily controllable ejection rate can be achieved and the powder jet can be targeted.
  • powder is in a closed container fluidized and a powder cloud emerges with relatively no air.
  • the powder leak rate can advantageously be determined by regulating easily measurable air pressures become. No level measurements are required. During the on or There is no loss of powder when switching off.
  • Fig. 1 shows a powder spray device 1, which essentially consists of a closed Container 2 with a first chamber 3 and a second chamber 4 consists.
  • a compressed air supply line 5 In the first chamber 3 opens a compressed air supply line 5. Compressed air 7 passes through a Frit 6 in the second chamber 4.
  • powder 8 In the second chamber 4 there is powder 8 which can be filled through a powder feed opening 9.
  • the air 7, which is passed through the frit 6 and fluidizes the powder 8, can through an air outlet opening 10 on the container 2 above the fluidized powder bed 8 exit again.
  • the fluidized powder 8 is removed from the area of the fluid bed through a pipe 25 and by a laterally arranged on the container 2 and with a Closing device 13 closable nozzle 11 led out.
  • needles are arranged as corona electrodes 14 are connected to a high voltage source, not shown, and the one Charge the emerging powder particles.
  • the shape of the emerging powder cloud 15 can be increased by the nozzle 11 and additional Impact bodies 16, 22 (see also FIGS. 10 to 14) can be determined.
  • the shape and arrangement the electrodes 14 can be adapted to it.
  • the air supply can be influenced and using a flow meter 18 to measure the air supply rate become.
  • the outlet opening 10 for fluidizing air is through a controllable outlet valve 19 completed, with which a defined flow resistance can be set is.
  • the air pressure p 1 in the first chamber 3 and the air pressure p 4 above the powder bed 8 can be regulated via the valves 17 and 19 with the aid of a control and regulating device, not shown.
  • the pressures p 1 and p 4 are measured using suitable pressure sensors.
  • the ambient air pressure is denoted by p 0 .
  • p 2 With p 2 the air pressure above the frit 6 and thus immediately below the fluidized powder bed is designated.
  • the pressure drop p 1 -p 2 depends on the selected frit 6 and must be taken into account when dimensioning.
  • P 3 denotes the pressure inside the container 2 at the powder outlet opening 11, which can be adjusted by regulating the pressures p 1 and p 4 .
  • the powder output rate can be set and controlled very well. There are high output rates in the range of 100 g / min to 1000 g / min can be achieved.
  • the control behavior The setup is very good because fluidization and spraying in one Set up. Since there is no fluidization chamber 4 and nozzle 11 Hose connection, there are no fluctuations when switching on and off in powder output and no powder loss.
  • the fluidization can advantageously be operated near the loosening point; then the air / powder ratio of the sprayed powder is minimal. Besides, is this ensures a high level of uniformity of powder output.
  • the shape of the powder cloud 15 is u. a. by the shape of the nozzle 11 and the powder outlet area 12 can be influenced.
  • 2 shows a possible design of the nozzle 11 and the exit area 12 with dimensions given by way of example in millimeters specified.
  • FIGS. 3 and 4 show sections of the powder spraying device 1, the nozzle 11 shown in FIG. 2 with the closing device 13 in the open or closed position is shown.
  • FIG. 5 shows a top view of a typical cylindrical container 2 with an emerging powder cloud 15 shown.
  • the nozzle 11 and the outlet area accordingly 12 can also achieve a different configuration of the powder cloud 15 as shown in FIG. 6.
  • Fig. 7 it is shown that the design of the Container 2 can be adapted to a desired shape of the cloud 15.
  • FIGS. 8 and 9 A simple possibility for nozzle design is shown in FIGS. 8 and 9, wherein an aperture 20 with different nozzle openings 21 is shown.
  • a particularly broad and even powder cloud can also be created using a Impactor (deflector) can be achieved, which - as shown in FIGS. 10 and 11 schematically is shown - also designed as an impact body 22 rotating about an axis 23 can be.
  • An associated drive device 24, including ball bearings 31 and drive belt 32 for the rotating impact body 22 is in the drawing merely hinted at. 10 and 11 is a different design of the Powder outlet area 12 shown. In Fig. 11 is still around the baffle 22 Cover 33 placed so that a rotating gap is formed, through which the shape of the powder cloud can be influenced additionally.
  • Figures 12 to 14 show further options for designing the powder outlet area.
  • Fig. 12 shows an arrangement in which both a rotating impact body 22 and rotating high voltage electrodes 14 are present.
  • the rotatable arrangement the components 22, 14 is indicated by the ball bearing 31 and the drive belt 32.
  • FIG. 13 shows an arrangement of, for example, a ring-shaped earth electrode 26 in Area between the wall of the container 2 and the impact body 22.
  • To the earth electrode 26 at least a portion of the ion stream flows, causing the powder stream to cross and improved charging is achieved.
  • the high voltage electrodes 14 are attached to the rotating impact body 22 in this case. With this arrangement at least part of the ion current flows from the high voltage electrode to the earth electrode and the powder particles are forced to cross this ion current, which will result in better charging.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Nozzles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
EP96115512A 1995-10-05 1996-09-27 Verfahren und Einrichtung zum Zuführen von Pulver zu einer Pulversprüheinrichtung Expired - Lifetime EP0767006B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537089 1995-10-05
DE19537089A DE19537089A1 (de) 1995-10-05 1995-10-05 Verfahren und Einrichtung zum Pulversprühen

Publications (2)

Publication Number Publication Date
EP0767006A1 EP0767006A1 (de) 1997-04-09
EP0767006B1 true EP0767006B1 (de) 1999-04-21

Family

ID=7774086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115512A Expired - Lifetime EP0767006B1 (de) 1995-10-05 1996-09-27 Verfahren und Einrichtung zum Zuführen von Pulver zu einer Pulversprüheinrichtung

Country Status (8)

Country Link
US (1) US5839669A (da)
EP (1) EP0767006B1 (da)
JP (1) JPH09248494A (da)
KR (1) KR970020204A (da)
AT (1) ATE179096T1 (da)
DE (2) DE19537089A1 (da)
DK (1) DK0767006T3 (da)
ES (1) ES2133871T3 (da)

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US6220791B1 (en) * 1999-03-11 2001-04-24 Board Of Trustees Of The University Of Arkansas Apparatus and method for the aerosolization of powders
DE19934920C1 (de) * 1999-07-20 2000-12-21 Schlick Gustav Gmbh & Co Auf einen Düsenkopf aufsetzbare Düsenkappe
LU90639B1 (de) * 2000-09-18 2002-03-19 Wurth Paul Sa Vorrichtung zum Einleiten von schwer fliessendem Schuettgut in eine Foerderleitung
DE10053295C2 (de) * 2000-10-27 2002-10-31 Eisenmann Lacktechnik Kg Hochrotationszerstäuber zur Aufbringung von Pulverlack
DE10113299A1 (de) * 2001-03-16 2002-09-19 Alstom Switzerland Ltd Verfahren zum Herstellen eines Leiterstabes
DE10138917A1 (de) 2001-08-08 2003-03-06 Itw Gema Ag Pulversprühbeschichtungsvorrichtung
US7128277B2 (en) * 2003-07-29 2006-10-31 Illinois Tool Works Inc. Powder bell with secondary charging electrode
US6988698B2 (en) * 2004-04-22 2006-01-24 Lucasay Manufacturing Co. Appliance mounting apparatus
US20070292218A1 (en) * 2006-06-15 2007-12-20 Robert John Suchey Dynamic blower system, and methods of constructing and utilizing same
DE102006032380B4 (de) * 2006-07-13 2011-06-01 Eisenmann Anlagenbau Gmbh & Co. Kg Vorrichtung zum Fördern fluidisierbarer Medien
JP5014266B2 (ja) 2008-06-11 2012-08-29 モレックス インコーポレイテド 光コネクタ
JP2011022198A (ja) 2009-07-13 2011-02-03 Molex Inc 光コネクタ
DE102010025749B4 (de) * 2010-06-30 2014-11-20 Gema Switzerland Gmbh Pulverversorgungsvorrichtung für eine Pulverbeschichtungsanlage
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CN108480079B (zh) * 2018-04-27 2023-08-22 临朐远宏金属制品有限公司 一种可自动清理的供粉中心

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Also Published As

Publication number Publication date
ES2133871T3 (es) 1999-09-16
ATE179096T1 (de) 1999-05-15
US5839669A (en) 1998-11-24
DE19537089A1 (de) 1997-04-10
KR970020204A (ko) 1997-05-28
DE59601699D1 (de) 1999-05-27
EP0767006A1 (de) 1997-04-09
DK0767006T3 (da) 1999-11-01
JPH09248494A (ja) 1997-09-22

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