EP1433539A2 - Receptacle for powder form substances - Google Patents

Receptacle for powder form substances Download PDF

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Publication number
EP1433539A2
EP1433539A2 EP03027529A EP03027529A EP1433539A2 EP 1433539 A2 EP1433539 A2 EP 1433539A2 EP 03027529 A EP03027529 A EP 03027529A EP 03027529 A EP03027529 A EP 03027529A EP 1433539 A2 EP1433539 A2 EP 1433539A2
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EP
European Patent Office
Prior art keywords
housing
storage container
container according
fluidization
section
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.)
Granted
Application number
EP03027529A
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German (de)
French (fr)
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EP1433539A3 (en
EP1433539B1 (en
Inventor
Jan Reichler
Erwin Hihn
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Eisenmann Anlagenbau GmbH and Co KG
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Eisenmann Anlagenbau GmbH and Co KG
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Publication of EP1433539A2 publication Critical patent/EP1433539A2/en
Publication of EP1433539A3 publication Critical patent/EP1433539A3/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
    • B05B7/1404—Arrangements for supplying particulate material
    • 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
    • B05C19/00—Apparatus specially adapted for applying particulate materials to surfaces
    • B05C19/02—Apparatus specially adapted for applying particulate materials to surfaces using fluidised-bed techniques

Definitions

  • storage tanks are often used required for powdered media in which a certain Amount of powdered medium temporarily stored can then be deducted for further use to become.
  • Such storage containers can be found, for example before, after or in screening machines in paint shops the application devices with which the paint powder is sprayed onto a workpiece, are connected upstream. In screening containers, the screening machines downstream are generally so much screened powder paint accumulated as for the complete painting of a Workpiece is required.
  • the object of the present invention is a storage container of the type mentioned at the outset, that the compressed air consumption is reduced and the quality of the discharged powdery medium improved is.
  • the funnel-shaped downward according to the invention has several positive consequences.
  • the focus is on reduction the area of the fluidization bottom, which is almost proportional with a corresponding reduction in demand comes with compressed air.
  • a desired side effect is that a certain amount of powdered medium that is located above the fluidization floor, at the shape of the housing according to the invention a larger Height occupies than this with known storage containers was the case.
  • Storage container also stands in its Interior better mixing of the powder Medium. This reduces the risk of air bubbles be sucked into the downstream system.
  • the upward reducing speed of the powdery Medium, the consequence of the expanding upwards Housing is finally reduced mechanical Strain on the powdery medium, so that less fine grain forms.
  • the cross section of the housing in Area of the fluidization floor about a tenth, still better about a twentieth of the maximum cross-section of the case or less.
  • the consumption of compressed air is lower and the more pronounced are the vortex flow and the slowing down of the flow velocity with increasing distance from the fluidization floor.
  • a preferred embodiment of the invention is the one immediately above the fluidization floor located portion of the housing cylindrical. On this way it is achieved that one minimal volume of powdery medium a large one Fill level immediately above the fluidization floor established. If now in this cylindrical Partial area which contains at least one outlet even with very small ones located in the storage container Amounts of the powdered medium do not pose the risk that Air is sucked in.
  • the at least one outlet is in the shape of a has the funnel open at the top, this has the storage container withdrawn powdery medium essentially the same grain composition as the powdery medium inside the storage container; so it is not preferred discharged a larger or finer grain fraction, as was the case with known storage containers.
  • the housing is at least partially consists of plastic. This reduces the risk of Baking paint powder on the inner surfaces of the housing. Choosing a transparent plastic, in particular Acrylic glass, so that can run out within the housing Movements of the powdery medium visually be observed and monitored.
  • An embodiment of the invention is as follows explained in more detail with reference to the drawing; the only figure shows a vertical section through a paint powder screening machine, in which a storage container according to the invention is integrated.
  • the shown in the drawing and overall with the reference number 1 marked screening machine for Paint powder comprises a housing 2 in which a horizontal Sieve tray 3 is arranged.
  • the housing 2 has in a circular outer contour for all horizontal cutting planes, whose diameter, however, depends on the height varies. It has the largest diameter Housing 2 at the height of the sieve bottom 3.
  • the one above of the sieve bottom 3 lying inlet area 2a of the housing 2nd tapers conically upwards so that a conical shape arises.
  • an inlet port 4 can be supplied via the paint powder.
  • the outlet area located below the sieve plate 3 2b of the housing 2 serves as a powder storage container for downstream application devices, as below still becomes clear.
  • the outlet area 2b can be from top down again in three sections 2ba, 2bb and 2bc differentiate.
  • the top one, the sieve plate 3 Adjacent portion 2ba is tapered downward with a relatively small cone angle to the horizontal.
  • the one adjoining the subarea 2ba at the bottom Section 2bb is also conical, however the cone angle included with the horizontal is significantly larger.
  • the bottom area 2bc of the outlet area 2a is finally cylindrical.
  • the cross-sectional area of the housing 2 in the lowest cylindrical Area 2bc is only about 1/23 of the cross-sectional area of the housing 2 in the area of the sieve plate 3.
  • a pressure chamber 6 is formed in this way which opens a supply line 7 for compressed air.
  • suction funnels 8, 9 are arranged, which expand upwards and their inlet openings point upward.
  • the suction funnels 8, 9 are each with rigid, one-piece molded pipe sections 8a, 9a provided by the cylinder wall of the partial area 2bc of the housing 2 passes through and there Hoses 10, 11 are connected.
  • the hoses 10, 11 each lead to a powder pump 12, 13 and from there to an application device no longer shown in the drawing, for example a powder bell, with which the powder is sprayed onto a workpiece.
  • the housing 2 has one radially projecting, annular flange 14.
  • This Flange 14 lies on its underside on several the circumference distributed load cells 15, which in turn via rubber buffer 16 on a fixed base 17 support.
  • a level sensor 18 In the interior of the outlet area 2b of the housing 2 finally attached a level sensor 18, the basically have any known construction can.
  • the electrical generated by this level sensor 18 Signal is a line 19 to a computer supplied, which controls the entire screening machine 1.
  • the screening machine 1 described above operates as follows:
  • the sieved powder that reaches the outlet area 2b fills the above the fluidization tray 5 lying interior of the lowest portion 2bc completely and beyond the middle section 2bb and possibly also the partial area adjacent to the sieve tray 3 2ba up to a certain height. Because of the smaller cross-section of sub-areas 2bc, 2bb and 2ba in the outlet area 2b, the paint powder is sufficient there higher than in the inlet area 2a above the sieve 3.
  • the pressure chamber 6 below the fluidization tray 5 is supplied with compressed air via the feed line 7, which penetrates the fluidization base 5 upwards and fluidized the paint powder in a known manner. This is constantly on the move. Due to the funnel shape of the Conical sections 2bb and 2ba receive the paint powder flow a defined one in these areas Vertebral component, which ensures that a good Mixing of all grain sizes in the paint powder takes place. The fact that the sub-areas 2bb and 2ba upwards expand conically, the flow velocity also drops there of the paint powder, which protects the paint powder and thus ensures less fine grain formation.
  • the screening process can be started.
  • the pumps 12 and 13 in the hoses 10, 11 activated.
  • the fluidized paint powder is now essentially from the conical sections 2bb and possibly 2ba of the outlet area 2b of the screening machine 1 sucked.
  • a particularly homogeneous paint powder mixture is applied, which in particular also contains a proportion of fine grains which the fine grain fraction of the total in the outlet area 2b corresponds to the paint powder circulating there.
  • the work cycle begins after the painting process has been completed the screening machine 1 again with the weighing in new portion of paint powder in the inlet area 2a.

Landscapes

  • Coating Apparatus (AREA)
  • Nozzles (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Powder Metallurgy (AREA)

Abstract

The container (1) includes a casing (2) with at least one inlet (4) and outlet (8, 9). Inside it is a fluidizing bed(5) of air-permeable material, forming a pressure cavity (6) between the fluidizing bed and the floor of the casing, to which compressed air is supplied. The cross section of the casing narrows downwards towards the fluidizing bed.

Description

Die Erfindung betrifft einen Vorlagebehälter für pulverförmige Medien, insbesondere für Lackpulver, mit

  • a) einem Gehäuse, das mindestens einen Einlaß und mindestens einen Auslaß für das pulverförmige Medium aufweist;
  • b) einem im Innenraum des Gehäuses in Abstand von dessen Boden angeordneten Fluidisierungsboden aus porösem, von Luft durchströmbarem Material;
  • c) einem zwischen dem Fluidisierungsboden und dem Boden des Gehäuses liegenden Druckraum, der mit Druckluft beaufschlagbar ist.
    • The invention relates to a storage container for powdery media, in particular for paint powder
  • a) a housing which has at least one inlet and at least one outlet for the powdery medium;
  • b) a fluidization base made of porous material through which air can flow and which is arranged in the interior of the housing at a distance from its base;
  • c) a pressure chamber lying between the fluidization base and the base of the housing and to which compressed air can be applied.

    • In der pulververarbeitenden Industrie, insbesondere in der Lackiertechnik, werden häufig Vorlagebehälter für pulverförmige Medien benötigt, in denen eine bestimmte Menge des pulverförmigen Mediums zwischengespeichert werden kann, um dann zur weiteren Verwendung abgezogen zu werden. Derartige Vorlagebehälter finden sich beispielsweise vor, nach oder in Siebmaschinen, die in Lackieranlagen den Applikationseinrichtungen, mit denen das Lackpulver auf ein Werkstück aufgesprüht wird, vorgeschaltet sind. In Vorlagebehältern, die Siebmaschinen nachgeschaltet sind, wird im allgemeinen so viel gesiebtes Lackpulver angesammelt, wie zur vollständigen Lackierung eines Werkstücks erforderlich ist.In the powder processing industry, in particular in painting technology, storage tanks are often used required for powdered media in which a certain Amount of powdered medium temporarily stored can then be deducted for further use to become. Such storage containers can be found, for example before, after or in screening machines in paint shops the application devices with which the paint powder is sprayed onto a workpiece, are connected upstream. In screening containers, the screening machines downstream are generally so much screened powder paint accumulated as for the complete painting of a Workpiece is required.

    Bekannte, derzeit auf dem Markt befindliche Vorlagebehälter der eingangs genannten Art besitzen im wesentlichen zylindrische Gehäuse; der Begriff "zylindrisch" wird dabei im mathematischen Sinn gebraucht, beschreibt also ein geometrisches Gebilde, das in allen Höhen über der Grundfläche den selben Querschnitt besitzt. Als Auslässe werden Ansaugrohre eingesetzt, die von oben her in den Innenraum des Gehäuses bis relativ nahe an die Oberseite des Fluidisierungsbodens herangeführt sind und von dort das fluidisierte pulverförmige Medium nach oben absaugen. Diese bekannten Vorlagebehälter haben nicht nur einen erheblichen Druckluftverbrauch. Das in ihnen befindliche fluidisierte pulverförmige Medium unterliegt zudem einer hohen mechanischen Beanspruchung, was zu unerwünschter Feinkornbildung führen kann. Außerdem ist die Durchmischung des fluidisierten Pulvers nicht immer optimal. Schließlich kommt es bei diesem bekannten Vorlagebehälter zeitweise zu einem unerwünschten Ansaugen von Luft aus der in der Regel pulsierenden Pulverwirbelschicht über die Auslaßrohre, was zu einer Funktionsunterbrechung der Applikationseinrichtungen führt, die als "Pumpen" bezeichnet wird.Known storage containers currently on the market of the type mentioned have essentially cylindrical Casing; the term "cylindrical" is used used in the mathematical sense, describes a geometric structure that at all heights above the base has the same cross section. As outlets suction pipes are used, which from above into the Interior of the case to relatively close to the top of the fluidization floor and from there Aspirate the fluidized powder medium upwards. These known storage containers have not only one considerable compressed air consumption. The one in them fluidized powdery medium is also subject to one high mechanical stress, leading to undesirable Fine grain formation can result. In addition, the mixing of the fluidized powder is not always optimal. Finally it happens at times with this known storage container to an undesirable intake of air from the in the Usually pulsating fluidized bed over the outlet pipes, which leads to a functional interruption of the application devices leads, referred to as "pumps" becomes.

    Aufgabe der vorliegenden Erfindung ist es, einen Vorlagebehälter der eingangs genannten Art derart auszugestalten, daß der Druckluftverbrauch reduziert und die Qualität des ausgetragenen pulverförmigen Mediums verbessert ist.The object of the present invention is a storage container of the type mentioned at the outset, that the compressed air consumption is reduced and the quality of the discharged powdery medium improved is.

    Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß

  • d) der Querschnitt des Gehäuses sich nach unten auf den Fluidisierungsboden zu verjüngt.
    • This object is achieved in that
  • d) the cross section of the housing tapers downwards onto the fluidization base.

    • Die erfindungsgemäße, sich trichterförmig nach unten verjüngende Form des Gehäuses hat mehrere positive Konsequenzen. Im Vordergrund steht dabei die Reduzierung der Fläche des Fluidisierungsbodens, die nahezu proportional mit einer entsprechenden Reduzierung des Bedarfs an Druckluft einhergeht. Ein erwünschter Nebeneffekt ist, daß eine bestimmte Menge pulverförmigen Mediums, die sich oberhalb des Fluidisierungsbodens befindet, bei der erfindungsgemäßen Form des Gehäuses eine größere Höhe einnimmt als dies bei bekannten Vorlagebehältern der Fall war. Die größere Höhe des fluidisierten Pulvers über dem Fluidisierungsboden kann allerdings einen etwas größeren Druck der Druckluft erforderlich machen, was jedoch im allgemeinen in der Praxis ohne Bedeutung ist.The funnel-shaped downward according to the invention The tapered shape of the case has several positive consequences. The focus is on reduction the area of the fluidization bottom, which is almost proportional with a corresponding reduction in demand comes with compressed air. A desired side effect is that a certain amount of powdered medium that is located above the fluidization floor, at the shape of the housing according to the invention a larger Height occupies than this with known storage containers was the case. The greater height of the fluidized powder Something can happen above the fluidization tray require greater pressure of the compressed air what but is generally of no importance in practice.

    Aufgrund der Trichterform des Gehäuses des erfindungsgemäßen Vorlagebehälters stellt sich außerdem in dessen Innenraum eine bessere Durchmischung des pulverförmigen Mediums ein. Dies reduziert die Gefahr, daß Luftblasen in das nachgeschaltete System eingesaugt werden. Die sich nach oben reduzierende Geschwindigkeit des pulverförmigen Mediums, die Folge des sich nach oben erweiternden Gehäuses ist, reduziert schließlich die mechanische Beanspruchung des pulverförmigen Mediums, so daß sich weniger Feinkorn bildet.Because of the funnel shape of the housing of the invention Storage container also stands in its Interior better mixing of the powder Medium. This reduces the risk of air bubbles be sucked into the downstream system. The upward reducing speed of the powdery Medium, the consequence of the expanding upwards Housing is finally reduced mechanical Strain on the powdery medium, so that less fine grain forms.

    Zweckmäßig ist, daß der Querschnitt des Gehäuses im Bereich des Fluidisierungsbodens etwa ein Zehntel, noch besser etwa ein Zwanzigstel des maximalen Querschnitts des Gehäuses oder weniger beträgt. Entsprechend geringer ist der Verbrauch an Druckluft und umso stärker ausgeprägt sind die Wirbelströmung und die Verlangsamung der Strömungsgeschwindigkeit mit zunehmendem Abstand vom Fluidisierungsboden.It is useful that the cross section of the housing in Area of the fluidization floor about a tenth, still better about a twentieth of the maximum cross-section of the case or less. Correspondingly lower is the consumption of compressed air and the more pronounced are the vortex flow and the slowing down of the flow velocity with increasing distance from the fluidization floor.

    Bei einer bevorzugten Ausführungsform der Erfindung ist der sich unmittelbar oberhalb des Fluidisierungsbodens befindende Teilbereich des Gehäuses zylindrisch. Auf diese Weise wird erreicht, daß sich bereits bei einem minimalen Volumen an pulverförmigem Medium eine große Füllhöhe unmittelbar oberhalb des Fluidisierungsbodens einstellt. Wenn sich nunmehr in diesem zylindrischen Teilbereich der mindestens eine Auslaß befindet, besteht auch bei sehr kleinen in dem Vorlagebehälter befindlichen Mengen des pulverförmigen Mediums die Gefahr nicht, daß Luft angesaugt wird.In a preferred embodiment of the invention is the one immediately above the fluidization floor located portion of the housing cylindrical. On this way it is achieved that one minimal volume of powdery medium a large one Fill level immediately above the fluidization floor established. If now in this cylindrical Partial area which contains at least one outlet even with very small ones located in the storage container Amounts of the powdered medium do not pose the risk that Air is sucked in.

    Wenn der mindestens eine Auslaß die Form eines nach oben offenen Trichters besitzt, hat das dem Vorlagebehälter entnommene pulverförmige Medium im wesentlichen die selbe Kornzusammensetzung wie das pulverförmige Medium innerhalb des Vorlagebehälters; es wird also nicht vorzugsweise eine größere oder feinere Kornfraktion ausgetragen, wie dies bei bekannten Vorlagebehältern der Fall war.If the at least one outlet is in the shape of a has the funnel open at the top, this has the storage container withdrawn powdery medium essentially the same grain composition as the powdery medium inside the storage container; so it is not preferred discharged a larger or finer grain fraction, as was the case with known storage containers.

    Zweckmäßig ist weiter, wenn das Gehäuse zumindest teilweise aus Kunststoff besteht. Dies reduziert die Gefahr des Anbackens von Lackpulver an den Innenflächen des Gehäuses. Wählt man einen transparenten Kunststoff, insbesondere Acrylglas, so können die innerhalb des Gehäuses ablaufenden Bewegungsvorgänge des pulverförmigen Mediums visuell beobachtet und überwacht werden.It is also expedient if the housing is at least partially consists of plastic. This reduces the risk of Baking paint powder on the inner surfaces of the housing. Choosing a transparent plastic, in particular Acrylic glass, so that can run out within the housing Movements of the powdery medium visually be observed and monitored.

    Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; die einzige Figur zeigt einen vertikalen Schnitt durch eine Lackpulver-Siebmaschine, in welche ein erfindungsgemäßer Vorlagebehälter integriert ist.An embodiment of the invention is as follows explained in more detail with reference to the drawing; the only figure shows a vertical section through a paint powder screening machine, in which a storage container according to the invention is integrated.

    Die in der Zeichnung dargestellte und insgesamt mit dem Bezugszeichen 1 gekennzeichnete Siebmaschine für Lackpulver umfaßt ein Gehäuse 2, in dem ein horizontaler Siebboden 3 angeordnet ist. Das Gehäuse 2 besitzt in allen horizontalen Schnittebenen eine kreisförmige Außenkontur, deren Durchmesser jedoch in Abhängigkeit von der Höhe variiert. Den größten Durchmesser besitzt das Gehäuse 2 in der Höhe des Siebbodens 3. Der oberhalb des Siebbodens 3 liegende Einlaßbereich 2a des Gehäuses 2 verjüngt sich nach oben konisch, so daß eine Kegelform entsteht. An der Spitze des Einlaßbereichs 2a mündet in den Innenraum des Gehäuses 2 ein Einlaßstutzen 4, über den Lackpulver zugeführt werden kann.The shown in the drawing and overall with the reference number 1 marked screening machine for Paint powder comprises a housing 2 in which a horizontal Sieve tray 3 is arranged. The housing 2 has in a circular outer contour for all horizontal cutting planes, whose diameter, however, depends on the height varies. It has the largest diameter Housing 2 at the height of the sieve bottom 3. The one above of the sieve bottom 3 lying inlet area 2a of the housing 2nd tapers conically upwards so that a conical shape arises. At the tip of the inlet area 2a opens in the interior of the housing 2, an inlet port 4, can be supplied via the paint powder.

    Der unterhalb des Siebbodens 3 befindliche Auslaßbereich 2b des Gehäuses 2 dient als Pulvervorlagebehälter für nachgeschaltete Applikationseinrichtungen, wie nachfolgend noch deutlich wird. Der Auslaßbereich 2b läßt sich von oben nach unten wiederum in drei Teilbereiche 2ba, 2bb und 2bc unterscheiden. Der oberste, dem Siebboden 3 benachbarte Teilbereich 2ba verläuft nach unten konisch mit einem verhältnismäßig kleinen Konuswinkel zur Horizontalen. Der sich an den Teilbereich 2ba nach unten anschliessende Teilbereich 2bb ist ebenfalls konisch, wobei jedoch der mit der Horizontalen eingeschlossene Konuswinkel erheblich größer ist. Der unterste Bereich 2bc des Auslaßbereichs 2a schließlich ist kreiszylindrisch. Die Querschnittsfläche des Gehäuses 2 im untersten zylindrischen Bereich 2bc beträgt nur etwa 1/23 der Querschnittsfläche des Gehäuses 2 im Bereich des Siebbodens 3.The outlet area located below the sieve plate 3 2b of the housing 2 serves as a powder storage container for downstream application devices, as below still becomes clear. The outlet area 2b can be from top down again in three sections 2ba, 2bb and 2bc differentiate. The top one, the sieve plate 3 Adjacent portion 2ba is tapered downward with a relatively small cone angle to the horizontal. The one adjoining the subarea 2ba at the bottom Section 2bb is also conical, however the cone angle included with the horizontal is significantly larger. The bottom area 2bc of the outlet area 2a is finally cylindrical. The cross-sectional area of the housing 2 in the lowest cylindrical Area 2bc is only about 1/23 of the cross-sectional area of the housing 2 in the area of the sieve plate 3.

    In einer gewissen Entfernung oberhalb des Bodens 2c des Gehäuses 2 wird der Innenraum des untersten Teilbereichs 2bc von einem horizontalen Fluidisierungsboden 5 durchsetzt. Unterhalb dieses Fluidisierungsbodens 5 wird auf diese Weise ein Druckraum 6 gebildet, in den eine Zuführleitung 7 für Druckluft mündet. At a certain distance above the floor 2c of the housing 2 becomes the interior of the lowest section 2bc from a horizontal fluidization tray 5 enforced. Below this fluidization floor 5, a pressure chamber 6 is formed in this way which opens a supply line 7 for compressed air.

    Oberhalb des Fluidisierungsbodens 5, jedoch im wesentlichen noch innerhalb des zylindrischen unteren Teilbereichs 2bc des Gehäuses 2 sind zwei Ansaugtrichter 8, 9 angeordnet, die sich nach oben erweitern und deren Einlaßöffnungen nach oben zeigen. Die Ansaugtrichter 8, 9 sind jeweils mit starren, einstückig angeformten Leitungsabschnitten 8a, 9a versehen, die durch die Zylinderwand des Teilbereichs 2bc des Gehäuses 2 hindurchführt und dort an Schläuche 10, 11 angeschlossen sind. Die Schläuche 10, 11 führen jeweils zu einer Pulverpumpe 12, 13 und von dort zu einer in der Zeichnung nicht mehr dargestellten Applikationseinrichtung, beispielsweise einer Pulverglocke, mit welcher das Pulver auf ein Werkstück gesprüht wird.Above the fluidization tray 5, however, essentially still within the cylindrical lower portion 2bc the housing 2, two suction funnels 8, 9 are arranged, which expand upwards and their inlet openings point upward. The suction funnels 8, 9 are each with rigid, one-piece molded pipe sections 8a, 9a provided by the cylinder wall of the partial area 2bc of the housing 2 passes through and there Hoses 10, 11 are connected. The hoses 10, 11 each lead to a powder pump 12, 13 and from there to an application device no longer shown in the drawing, for example a powder bell, with which the powder is sprayed onto a workpiece.

    Im Bereich des Siebbodens 3 besitzt das Gehäuse 2 einen radial überstehenden, ringförmigen Flansch 14. Dieser Flansch 14 liegt an seiner Unterseite auf mehreren über den Umfang verteilten Wiegezellen 15 auf, die sich ihrerseits über Gummipuffer 16 an einer raumfesten Unterlage 17 abstützen.In the area of the sieve bottom 3, the housing 2 has one radially projecting, annular flange 14. This Flange 14 lies on its underside on several the circumference distributed load cells 15, which in turn via rubber buffer 16 on a fixed base 17 support.

    Im Innenraum des Auslaufbereichs 2b des Gehäuses 2 ist schließlich ein Füllstandssensor 18 angebracht, der grundsätzlich eine beliebige, bekannte Bauweise besitzen kann. Das von diesem Füllstandssensor 18 erzeugte elektrische Signal wird über eine Leitung 19 einem Rechner zugeführt, der die gesamte Siebmaschine 1 steuert.In the interior of the outlet area 2b of the housing 2 finally attached a level sensor 18, the basically have any known construction can. The electrical generated by this level sensor 18 Signal is a line 19 to a computer supplied, which controls the entire screening machine 1.

    Die oben beschriebene Siebmaschine 1 arbeitet wie folgt:The screening machine 1 described above operates as follows:

    Vor Beginn eines Lackiervorgangs wird mit Hilfe eines nicht dargestellten Dosierventils in den Innenraum des Einlaßbereichs 2a eine solche Menge Lackpulver eindosiert, die zur vollständigen Lackierung eines Werkstückes erforderlich ist. Diese Lackmenge kann mit Hilfe der Wiegezellen 15, auf denen die gesamte Siebmaschine 1 aufruht, überwacht werden. Da der Siebboden 3 verhältnismäßig großflächig ist, verteilt sich die auf ihn aufgebrachte Pulvermenge; das Absieben in den unterhalb des Siebbodens 3 liegenden Auslaßbereichs 2b erfolgt daher verhältnismäßig rasch.Before starting a painting process, using a Dosing valve, not shown, in the interior of the Inlet area 2a doses such a quantity of paint powder, necessary for the complete painting of a workpiece is. This amount of paint can be applied with the help of the load cells 15, on which the entire screening machine 1 rests, be monitored. Since the sieve bottom 3 is relatively is spread over a large area, the applied to it Amount of powder; sieving into the bottom of the sieve 3 lying outlet area 2b is therefore proportionate quickly.

    Das in den Auslaufbereich 2b gelangende, gesiebte Siebpulver füllt den oberhalb des Fluidisierungsbodens 5 liegenden Innenraum des untersten Teilbereichs 2bc vollständig und darüber hinaus den mittleren Teilbereich 2bb und ggf. auch noch den dem Siebboden 3 benachbarten Teilbereich 2ba bis zu einer bestimmten Höhe aus. Aufgrund des geringeren Querschnitts der Teilbereiche 2bc, 2bb und 2ba im Auslaufbereich 2b reicht dort das Lackpulver erheblich höher als im Einlaßbereich 2a oberhalb des Siebs 3.The sieved powder that reaches the outlet area 2b fills the above the fluidization tray 5 lying interior of the lowest portion 2bc completely and beyond the middle section 2bb and possibly also the partial area adjacent to the sieve tray 3 2ba up to a certain height. Because of the smaller cross-section of sub-areas 2bc, 2bb and 2ba in the outlet area 2b, the paint powder is sufficient there higher than in the inlet area 2a above the sieve 3.

    Der Siebvorgang ist korrekt abgeschlossen, wenn der Füllstandssensor 18 im Auslaufbereich 2b des Gehäuses 2 denjenigen Füllstand ermittelt, welcher im wesentlichen dem vollen, über dem Einlaßstutzen 4 zugegebenen Lackvolumen entspricht.The sieving process is completed correctly when the Level sensor 18 in the outlet area 2b of the housing 2 that level determined, which essentially the full paint volume added above the inlet port 4 equivalent.

    Der Druckraum 6 unterhalb des Fluidisierungsbodens 5 wird über die Zuführleitung 7 mit Druckluft versorgt, welche den Fluidisierungsboden 5 nach oben durchdringt und das Lackpulver in bekannter Weise fluidisiert. Dieses ist also ständig in Bewegung. Durch die Trichterform der konischen Teilbereiche 2bb und 2ba erhält die Lackpulverströmung in diesen Teilbereichen zusätzlich eine definierte Wirbelkomponente, welche dafür sorgt, daß eine gute Durchmischung aller Korngrößen im Lackpulver stattfindet. Dadurch, daß sich die Teilbereiche 2bb und 2ba nach oben konisch erweitern, sinkt dort zudem die Strömungsgeschwindigkeit des Lackpulvers ab, was das Lackpulver schont und so für eine geringere Feinkornbildung sorgt.The pressure chamber 6 below the fluidization tray 5 is supplied with compressed air via the feed line 7, which penetrates the fluidization base 5 upwards and fluidized the paint powder in a known manner. This is constantly on the move. Due to the funnel shape of the Conical sections 2bb and 2ba receive the paint powder flow a defined one in these areas Vertebral component, which ensures that a good Mixing of all grain sizes in the paint powder takes place. The fact that the sub-areas 2bb and 2ba upwards expand conically, the flow velocity also drops there of the paint powder, which protects the paint powder and thus ensures less fine grain formation.

    Ist der Siebvorgang abgeschlossen, hat also im wesentlichen das gesamte eindosierte Lackpulver den Siebboden 3 passiert, so kann der Lackiervorgang begonnen werden. Hierzu werden die Pumpen 12 und 13 in den Schläuchen 10, 11 aktiviert. Das fluidisierte Lackpulver wird nunmehr im wesentlichen aus den konischen Teilbereichen 2bb und ggfs. 2ba des Auslaufbereichs 2b der Siebmaschine 1 angesaugt. Bei der beschriebenen Orientierung der Ansaugtrichter 8, 9, bei der deren Ansaugöffnung nach oben weist und der Ansaugvorgang von oben nach unten erfolgt, wird eine besonders homogene Lackpulvermischung ausgetragen, die insbesondere auch einen Feinkornanteil enthält, der dem Feinkornanteil des gesamten im Auslaufbereich 2b befindlichen und dort zirkulierenden Lackpulvers entspricht.Once the screening process is complete, it essentially has all the lacquer powder dosed into the sieve tray 3 happens, the painting process can be started. For this purpose, the pumps 12 and 13 in the hoses 10, 11 activated. The fluidized paint powder is now essentially from the conical sections 2bb and possibly 2ba of the outlet area 2b of the screening machine 1 sucked. With the described orientation of the suction funnels 8, 9, in which the suction opening points upwards and the suction process takes place from top to bottom a particularly homogeneous paint powder mixture is applied, which in particular also contains a proportion of fine grains which the fine grain fraction of the total in the outlet area 2b corresponds to the paint powder circulating there.

    Durch die Form und Orientierung der Ansaugtrichter 8, 9 können auch unter sehr ungünstigen Umständen entstehende Luftblasen nicht angesaugt werden.Due to the shape and orientation of the suction funnels 8, 9 can also arise under very unfavorable circumstances Air bubbles cannot be sucked in.

    Nach Abschluß des Lackiervorgangs beginnt der Arbeitszyklus der Siebmaschine 1 von neuem mit dem Einwiegen einer neuen Portion Lackpulver in den Einlaßbereich 2a.The work cycle begins after the painting process has been completed the screening machine 1 again with the weighing in new portion of paint powder in the inlet area 2a.

    Claims (8)

    Vorlagebehälter für pulverförmige Medien, insbesondere für Lackpulver, mit a) einem Gehäuse, das mindestens einen Einlaß und mindestens einen Auslaß für das pulverförmige Medium aufweist; b) einem im Innenraum des Gehäuses im Abstand von dessen Boden angeordneten Fluidisierungsboden aus porösem, von Luft durchströmbaren Material; c) einem zwischen dem Fluidisierungsboden und dem Boden des Gehäuses liegenden Druckraum, der mit Druckluft beaufschlagbar ist,
    dadurch gekennzeichnet, daß     d) der Querschnitt des Gehäuses (2) sich nach unten auf den Fluidisierungsboden (9) zu verjüngt.     Storage container for powdery media, especially for paint powder, with a) a housing which has at least one inlet and at least one outlet for the powdery medium; b) a fluidization base made of porous material through which air can flow, arranged in the interior of the housing at a distance from its base; c) a pressure chamber lying between the fluidization base and the base of the housing and to which compressed air can be applied,
    characterized in that     d) the cross section of the housing (2) tapers downward onto the fluidization base (9).     Vorlagebehälter nach Anspruch 1, dadurch gekennzeichnet, daß der Querschnitt des Gehäuses (2) im Bereich des Fluidisierungsbodens (5) etwa ein Zehntel des maximalen Querschnitts des Gehäuses (2) oder weniger beträgt.Storage container according to Claim 1, characterized in that the cross section of the housing (2) in the region of the fluidization base (5) is approximately one tenth of the maximum cross section of the housing (2) or less. Vorlagebehälter nach Anspruch 2, dadurch gekennzeichnet, daß der Querschnitt des Gehäuses (2) im Bereich des Fluidisierungsbodens (5) etwa ein Zwanzigstel des maximalen Querschnitts des Gehäuses (2) oder weniger beträgt. Storage container according to claim 2, characterized in that the cross section of the housing (2) in the region of the fluidization base (5) is approximately one twentieth of the maximum cross section of the housing (2) or less. Vorlagebehälter nach einem der Ansprüche 1 bis 3,
       dadurch gekennzeichnet, daß der sich unmittelbar oberhalb des Fluidisierungsbodens (5) befindende Teilbereich (2bc) des Gehäuses (2) zylindrisch ist.    Storage container according to one of claims 1 to 3,
    characterized in that the portion (2bc) of the housing (2) located immediately above the fluidization base (5) is cylindrical.         Vorlagebehälter nach Anspruch 4, dadurch gekennzeichnet, daß der mindestens eine Auslaß (8, 9) sich in dem zylindrischen Teilbereich (2bc) des Gehäuses (2) befindet.Storage container according to claim 4, characterized in that the at least one outlet (8, 9) is located in the cylindrical portion (2bc) of the housing (2). Vorlagebehälter nach Anspruch 5, dadurch gekennzeichnet, daß der mindestens eine Auslaß (8, 9) die Form eines nach oben offenen Trichters besitzt.Storage container according to claim 5, characterized in that the at least one outlet (8, 9) has the shape of a funnel open at the top. Vorlagebehälter nach einem der vorhergehenden Ansprüche,
       dadurch gekennzeichnet, daß das Gehäuse (2) zumindest teilweise aus Kunststoff besteht.    Storage container according to one of the preceding claims,
    characterized in that the housing (2) consists at least partially of plastic.         Vorlagebehälter nach Anspruch 7, dadurch gekennzeichnet, daß das Gehäuse (2) zumindest teilweise aus transparentem Kunststoff, insbesondere Acrylglas, besteht.Storage container according to claim 7, characterized in that the housing (2) consists at least partially of transparent plastic, in particular acrylic glass.
    EP03027529A 2002-12-27 2003-11-29 Receptacle for powder form substances Expired - Lifetime EP1433539B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE10261276 2002-12-27
    DE10261276A DE10261276B4 (en) 2002-12-27 2002-12-27 Reservoir for powdered media

    Publications (3)

    Publication Number Publication Date
    EP1433539A2 true EP1433539A2 (en) 2004-06-30
    EP1433539A3 EP1433539A3 (en) 2004-11-24
    EP1433539B1 EP1433539B1 (en) 2006-06-07

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    ID=32404339

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP03027529A Expired - Lifetime EP1433539B1 (en) 2002-12-27 2003-11-29 Receptacle for powder form substances

    Country Status (5)

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    US (1) US6948888B2 (en)
    EP (1) EP1433539B1 (en)
    CN (1) CN100554101C (en)
    AT (1) ATE328672T1 (en)
    DE (2) DE10261276B4 (en)

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    EP1778417A4 (en) * 2004-08-20 2013-06-19 Ricoh Co Ltd Powder container, cleaning method and cleaning apparatus for cleaning the powder container
    DE102004059870B4 (en) * 2004-12-13 2011-06-22 EISENMANN Anlagenbau GmbH & Co. KG, 71032 Method and installation for coating objects
    DE102008016395A1 (en) * 2008-03-29 2009-10-08 Eisenmann Anlagenbau Gmbh & Co. Kg Reservoir for powdered media, plant for conveying powdered media and method for operating such
    US9849462B2 (en) * 2014-09-16 2017-12-26 Snoby Separation Systems, Llc Sifting apparatuses

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    Also Published As

    Publication number Publication date
    US20040197153A1 (en) 2004-10-07
    CN100554101C (en) 2009-10-28
    DE10261276B4 (en) 2005-12-01
    DE50303672D1 (en) 2006-07-20
    EP1433539A3 (en) 2004-11-24
    DE10261276A1 (en) 2004-07-22
    EP1433539B1 (en) 2006-06-07
    CN1511768A (en) 2004-07-14
    ATE328672T1 (en) 2006-06-15
    US6948888B2 (en) 2005-09-27

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