EP0450295A2 - Dispositif de convoyage et de fluidisation - Google Patents

Dispositif de convoyage et de fluidisation Download PDF

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Publication number
EP0450295A2
EP0450295A2 EP91102456A EP91102456A EP0450295A2 EP 0450295 A2 EP0450295 A2 EP 0450295A2 EP 91102456 A EP91102456 A EP 91102456A EP 91102456 A EP91102456 A EP 91102456A EP 0450295 A2 EP0450295 A2 EP 0450295A2
Authority
EP
European Patent Office
Prior art keywords
powder
container
lid
opening
fluidizing
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.)
Withdrawn
Application number
EP91102456A
Other languages
German (de)
English (en)
Other versions
EP0450295A3 (en
Inventor
Johann Ing. Htl Gruber
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.)
Wagner International AG
Original Assignee
Wagner International AG
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 DE19904010914 external-priority patent/DE4010914C1/de
Priority claimed from DE19904010915 external-priority patent/DE4010915A1/de
Application filed by Wagner International AG filed Critical Wagner International AG
Publication of EP0450295A2 publication Critical patent/EP0450295A2/fr
Publication of EP0450295A3 publication Critical patent/EP0450295A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B69/00—Unpacking of articles or materials, not otherwise provided for
    • B65B69/0075—Emptying systems for flexible intermediate bulk containers [FIBC]
    • B65B69/0091—Emptying systems for flexible intermediate bulk containers [FIBC] using frames whereby the container is bottom supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/05—Fluidized bed

Definitions

  • the invention relates to a fluidizing and conveying device for electrostatic powder coating devices.
  • the applicators In the case of electrostatic powder coating devices, the applicators, that is to say the powder guns, must be supplied with the powder in the form of a powder-air mixture, the most uniform distribution of the powder particles in the powder-air stream being particularly important.
  • the procedure is such that the powder transported in so-called original containers, namely sacks, barrels, boxes or plastic containers, is first poured into special processing containers.
  • These treatment tanks have an inner bottom in the form of a porous plate (fluidizing plate), a compressed air supply and a discharge line. The powder is loosened and fluidized strongly by the compressed air above the fluidizing plate, the powder-air mixture then being removed from the resulting floating bed and conveyed to the powder gun.
  • DE-PS 36 11 039 discloses an example of such a treatment container.
  • a disadvantage of these processing containers is the effort required for their cleaning, which is particularly important when frequent powder color changes are required. In order to avoid this disadvantage, it has already been suggested that the powder be sucked off directly from the original container.
  • EP 0 184 994 discloses a lance-like powder suction device consisting of a suction pipe and several compressed air lines, which is inserted from above into the - previously opened - original container, fluidizes the powder in the area of the mouth of the suction pipe and sucks off the fluidized powder in this way.
  • the original container can be placed on a vibrator to loosen the powder.
  • a special processing container is saved here and color changes are much faster and easier to carry out. Due to the only regional fluidization in front of the intake manifold opening, however, especially in the case of powders that are difficult to fluidize, the powder distribution in the outflowing powder-air stream may not be quite as uniform as in the case of the special preparation containers mentioned at the beginning, in which case yes A floating bed is generated over the entire cross-sectional area of the container.
  • the solution to this problem results from the features of patent claim 1.
  • the powder therefore does not come into contact with the walls of the processing container.
  • the fluidizing plate, the compressed air supply and the discharge line are arranged on the removable cover, which also makes the cleaning process easier. Nevertheless, after the container has been swiveled through 180 °, a fluidization process takes place which ensures a powder floating bed over the entire cross-sectional area, with the result of a very uniform powder-air mixture in the discharge pipe.
  • a container 10 which has the shape of a cup open at the top.
  • the cup 10 is pivotally mounted on a support frame 11.
  • a lid 12 which closes the opening of the container 10 is designated by 12 and has on its side facing the interior of the container 10 a fluidizing plate 13 which extends over the entire cross-sectional area.
  • the lid 10 is penetrated by a powder discharge tube 14, this tube 14 penetrating both the lid cover 12a and the fluidizing plate 13 and closely adjacent to the fluidizing plate 13 opens into the interior of the container 10.
  • a compressed air supply line 15 is arranged on the cover 12, which opens into the space between the cover cover 12a and the fluidizing plate 13.
  • an annular clamping device 16 is provided.
  • a transport container is inserted into the container 10, which is open at the top and thus freed from the lid 12, in the present case a sack 17 which is filled with powder 18.
  • the sack 17 is then opened and its edge is placed over the lower part of the clamping device, namely the lower clamping ring 16a.
  • the upper part of the clamping device 16 namely the clamping ring 16b, is put on, the two clamping rings 16b, 16a being braced against one another by a device (not shown), for example a spring device.
  • a device not shown
  • a spring device for example a spring device
  • the lid 12 with the fluidizing plate 13, the discharge pipe 14 and the compressed air supply 15 is placed on the edge of the container 10 and fastened in a sealing manner to the container 10 by a locking device (not shown).
  • the container 10 closed by the lid 12 is pivoted in its supporting frame 11 by 180 °, so that it assumes the “overhead position” shown in FIG. 2.
  • compressed air is fed through the line 15, which penetrates through the fluidizing plate 13 and fluidizes the powder layer located above the fluidizing plate 13.
  • a powder-air mixture is conveyed downward from the floating bed and this powder-air mixture is then transported to a powder gun (not shown).
  • a powder gun not shown
  • the container 10 is pivoted back into the position of FIG. 1, the lid 12 removed and the now empty sack 17 removed after opening the clamping device 16.
  • a new, filled powder bag 17 can then be inserted into the container 10. If the new powder bag contains a powder of a different color, a different consistency and / or a different size, then the lid 12 must be cleaned, for example by blowing air, before it is replaced, but this can be done quickly and easily.
  • the clamping device 16 can have different designs; It is easiest if the lower clamping ring 16a is attached to the container 10 and the upper clamping ring 16b to the lid 12.
  • the pipes 14 and 15 connect to flexible lines, such as hoses, to enable the container 10 to be tilted by 180 °.
  • FIG. 3 The basic structure of the embodiment according to FIG. 3 corresponds to that according to FIGS. 1 and 2, the same reference numerals being chosen for the same parts.
  • a discharge pipe 20 is provided which passes through the lid 12 and opens close to the bottom 10a of the container 10.
  • the purpose of the tube 20 is to discharge excess air. It has been shown that, in particular in the case of large transport containers and powders of a high specific weight, considerable amounts of air are required for fluidization, which cannot or should not be discharged through the pipe 14 together with the powder. Through the additional exhaust pipe 20, the excess exhaust air is now discharged separately from the powder-air mixture flowing in the pipe 14.
  • the embodiment according to FIG. 4 differs from that according to FIG. 3 only in that between the discharge pipe 14 and the powder-air mixture for the powder gun promoting line 30 an injector 31 is turned on. This enables the powder-air flow to be diluted or the powder content to be reduced.
  • this injector 31 can also be used in the embodiment of FIG. 1.
  • a vertical powder discharge pipe 14 is fastened to the cover 12 and essentially passes through the entire container 10 centrally.
  • the tube 14 has an air inlet opening 14a at its lower end, which is adjacent to the housing base 10a, and an inlet opening 14b for fluidized powder close to the fluidizing plate 13.
  • the openings 14a and 14b which cannot be seen from the drawing, are designed in the manner of an aperture, ie their opening widths are adjustable, specifically separately from one another.
  • the container 10 is pivotally mounted on a support frame 11 such that it can be pivoted through 180 °.
  • the container 10 To fill the container 10 with powder, it is pivoted through 180 °, then the cover 12 is removed and a powder bag 17 with powder 18 therein is inserted into the container 10, which is now open at the top. The powder bag 17 is then opened and the bag edges are held in place by means of a clamping device 16. The lid 12 is then replaced and pressure-tightly connected to the container 10. The container 10 can now be swiveled back through 180 °, that is to say into the position shown in the drawing. If compressed air is now supplied through line 15, then a powder floating bed is formed over the fluidizing plate 13, from which a powder-air mixture reaches the tube 14 through the inlet opening 14b.
  • Excess compressed air which penetrates the powder mass 18 enters the space above the powder level 18a and also flows through the opening 14a into the pipe 14, where it then travels downwards with the powder-air entering through the opening 14b. Mixture mixed.
  • the powder-air stream exiting downward from the device is thus enriched with additional air, the amount of additional air being adjustable as desired, specifically by changing the width of the opening 14a.
  • the overpressure in the container 10 results from the amount of fluidizing air supplied in the unit of time and the cross section of the orifice of the upper air opening 14a, whereas the amount of powder removed is determined by the size of the orifice of the lower powder opening 14b.
  • automate the control process which can be done in that the adjustment of the diaphragms of the openings 14a and 14b takes place by motor and a control valve, which is likewise motor-driven, is inserted into the compressed air supply line. If a corresponding program is created, the control process can be made easier for the operator by means of a microprocessor, so that the operator only enters the desired quantity ratio of powder to air in the discharged powder-air stream, whereupon the actual control processes take place automatically.
  • shielding roofs can be provided at the openings 14a and 14b.
  • the device according to the invention can undergo numerous modifications.
  • This relates first of all to the size and shape of the container 10 and the design of the supporting frame 11.
  • the cover 12 can be fastened to the container 10 in a hinged manner, for example by a hinge.
  • Such an embodiment is shown in FIG. 5 with two powder discharge pipes 14, which lead to two powder guns.
  • the fluidization process can be supported by a vibrator attached to the support frame 11 or to the container 10, for example the vibrator 32 indicated in FIG. 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Air Transport Of Granular Materials (AREA)
EP19910102456 1990-04-04 1991-02-20 Fluidising and conveying device Withdrawn EP0450295A3 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4010914 1990-04-04
DE19904010914 DE4010914C1 (en) 1990-04-04 1990-04-04 Fluidising and convey set=up for electrostatic powder coating appts. - has container pivotable about 180 deg. on frame and with fluidising plate on lid
DE4010915 1990-04-04
DE19904010915 DE4010915A1 (de) 1990-04-04 1990-04-04 Fluidisier- und foerdereinrichtung

Publications (2)

Publication Number Publication Date
EP0450295A2 true EP0450295A2 (fr) 1991-10-09
EP0450295A3 EP0450295A3 (en) 1992-01-08

Family

ID=25891880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102456 Withdrawn EP0450295A3 (en) 1990-04-04 1991-02-20 Fluidising and conveying device

Country Status (4)

Country Link
US (1) US5140935A (fr)
EP (1) EP0450295A3 (fr)
JP (1) JPH0669546B2 (fr)
KR (1) KR910018086A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344701A1 (de) * 1993-12-27 1995-09-14 Eisenmann Kg Maschbau Verfahren und Anordnung zur Überwachung des Pulverausstoßes an Pulverspritzanlagen
CN102632001A (zh) * 2012-04-19 2012-08-15 中冶京诚工程技术有限公司 一种粉末分流器

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07313922A (ja) * 1994-05-24 1995-12-05 I T M Kk 色替用気体搬送粉体供給システム
DE19538926A1 (de) * 1995-10-19 1997-04-24 Gema Volstatic Ag Vorrichtung zur Pulverbeschichtung
DE19837880A1 (de) * 1998-08-20 2000-02-24 Erich Kraemer Kombiträger für unterschiedlich große Pulvergebinde
DE10304892B3 (de) * 2003-02-06 2004-08-19 Dürr Systems GmbH Betriebsverfahren für eine Pulverversorgungseinrichtung
US6830414B2 (en) * 2003-03-27 2004-12-14 General Motors Corporation Canister powder paint delivery apparatus and method
US7963728B2 (en) * 2006-01-06 2011-06-21 Valspar Sourcing, Inc. Method and apparatus for powder delivery system
GB2481963B (en) * 2010-05-20 2015-11-11 Process Link Ltd Bulk handling system
GB2497538B (en) * 2011-12-13 2016-02-24 Rolls Royce Plc Fluidised bed treatment
GB2545532B (en) * 2016-08-25 2022-08-24 Process Link Ltd Bulk handling

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710979A (en) * 1971-04-19 1973-01-16 Degussa Method and apparatus for emptying large packages
JPS61217431A (ja) * 1985-03-20 1986-09-27 Kobe Steel Ltd 容器内からの粉体排出方法及び装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381728A (en) * 1981-10-19 1983-05-03 Northern Telecom Limited Fluidizable bed structure
EP0184994B2 (fr) * 1984-09-26 1992-11-19 Siegfried Frei Dispositif d'aspiration pour poudre
US4730647A (en) * 1986-12-08 1988-03-15 Nordson Corporation Powder feeder apparatus
DE3827014A1 (de) * 1988-04-14 1989-10-26 Erich Kraemer Verfahren und vorrichtung zum zufuehren eines pulverfoermigen materials zu einer versorgungseinrichtung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710979A (en) * 1971-04-19 1973-01-16 Degussa Method and apparatus for emptying large packages
JPS61217431A (ja) * 1985-03-20 1986-09-27 Kobe Steel Ltd 容器内からの粉体排出方法及び装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 11, no. 54 (M-563) 19. Februar 1987; & JP-A-61 217 431 (KOBE STEEL LTD ) 27. September 1986 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4344701A1 (de) * 1993-12-27 1995-09-14 Eisenmann Kg Maschbau Verfahren und Anordnung zur Überwachung des Pulverausstoßes an Pulverspritzanlagen
CN102632001A (zh) * 2012-04-19 2012-08-15 中冶京诚工程技术有限公司 一种粉末分流器

Also Published As

Publication number Publication date
EP0450295A3 (en) 1992-01-08
JPH04226216A (ja) 1992-08-14
JPH0669546B2 (ja) 1994-09-07
KR910018086A (ko) 1991-11-30
US5140935A (en) 1992-08-25

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