DE1302426B - DEVICE FOR POWDER COATING OF OBJECTS WITH A TROUGH CONTAINING THE POWDER WITH A POROESE BASE PLATE - Google Patents
DEVICE FOR POWDER COATING OF OBJECTS WITH A TROUGH CONTAINING THE POWDER WITH A POROESE BASE PLATEInfo
- Publication number
- DE1302426B DE1302426B DE19631302426 DE1302426A DE1302426B DE 1302426 B DE1302426 B DE 1302426B DE 19631302426 DE19631302426 DE 19631302426 DE 1302426 A DE1302426 A DE 1302426A DE 1302426 B DE1302426 B DE 1302426B
- Authority
- DE
- Germany
- Prior art keywords
- powder
- objects
- coated
- trough
- troughs
- 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
Links
Classifications
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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
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
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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
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
- B05B13/0468—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads
- B05B13/0473—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
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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
- 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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
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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
- 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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
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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
- 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
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/14—Plant for applying liquids or other fluent materials to objects specially adapted for coating continuously moving elongated bodies, e.g. wires, strips, pipes
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- 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
- B05C19/025—Combined with electrostatic means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/20—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wires
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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
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0447—Installation or apparatus for applying liquid or other fluent material to conveyed separate articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/007—Processes for applying liquids or other fluent materials using an electrostatic field
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- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
- Paints Or Removers (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zur Pulverbeschichtung von Gegenständen, bestehend aus einem das Pulver enthaltenden Trog mit einer porösen oder perforierten horizontalen Bodenplatte, durch deren gesamte Fläche ein das Pulver in ein Wirbelbett mit gegen die freie Luft deutlich abgegrenzter Oberfläche überführender Gasstrom aufsteigt, wobei der Trog elektrisch isoliert ist und eine Anzahl von in seinem Inneren verteilten Elektroden enthält, die mit einem Pol einer Gleichspannungsquelle hoher Spannung verbunden sind, und wobei die zu überziehenden Gegenstände an dem anderen Pol der Gleichspannungsquelle liegen.The invention relates to a device for powder coating objects, consisting of a the powder-containing trough with a porous or perforated horizontal bottom plate through the whole of it Place the powder in a fluidized bed with a surface that is clearly demarcated from the open air transferring gas flow rises, the trough being electrically insulated and a number of in its Inner distributed electrodes containing electrodes connected to one pole of a high voltage DC voltage source are, and the objects to be coated at the other pole of the DC voltage source lie.
Eine derartige Vorrichtung ist aus der USA.-Patentschrift 30 19 126 bekannt. Sie dient dazu, ein Metallband od. dgl. durch Eintauchen in das Wirbelbett mit einem dünnen Pulverüberzug zu versehen. Die Pulverteilchen folgen nämlich den unmittelbar von den Elektroden zu dem Metallband verlaufenden Kraftlinien. wobei angesichts der geringen Entfernung eine relativ geringe Ladung jedes einzelnen Pulverteilchens genügt, so daß es der Ausbildung eines Ionisationsbereiches an den Elektroden nicht bedarf. Bei dieser bekannten Vorrichtung tauchen im übrigen die Elektroden nur teilweise in das Wirbelbett ein, wodurch erreicht wird, daß oberhalb des Wirbelbettes die Kraftlinien (ebenfalls) parallel zur Wirbelbettoberfläche verlaufen, also verhindert wird, daß die Pulverteilchen in den Raum oberhalb des Wirbelbettes abgegeben werden. Nachteilig an dieser bekannten Vorrichtung ist, daß das Abdichtungsproblem bei der Herausführung des zu beschichtenden Gegenstandes aus dem Wirbelbett nur für verhältnismäßig einfach geformte Gegenstände wie Drähte, Bänder u.dgl. befriedigend lösbar ist. Vor allem aber fällt ins Gewicht, daß weder Gegenstände komplizierter Formen noch Gegenstände großer Abmessungen sich für das Tauchverfahren eignen, und zwar erstere mangels ausreichend gleichmäßiger Beschichtung und letztere wegen der unwirtschaftlich werdenden, erforderlichen Größe des Tauchbehälters oder Troges.Such a device is from the USA patent specification 30 19 126 known. It is used to support a metal band or the like by immersing it in the fluidized bed to provide a thin powder coating. Namely, the powder particles follow those directly from the electrodes lines of force extending to the metal band. where, given the short distance, a relatively A small charge of each individual powder particle is sufficient for the formation of an ionization region does not need the electrodes. In this known device, the electrodes are only partially immersed into the fluidized bed, whereby it is achieved that above the fluidized bed the lines of force (also) run parallel to the fluidized bed surface, thus preventing the powder particles from entering the space above of the fluidized bed. The disadvantage of this known device is that the sealing problem when leading out the to be coated Object from the fluidized bed only for relatively simply shaped objects such as wires, ribbons and the like can be solved satisfactorily. But most of all it falls weight that neither objects of complicated shapes nor objects of large dimensions suitable for the immersion process, namely the former due to the lack of a sufficiently uniform coating and the latter because of the uneconomical, required size of the immersion tank or trough.
Aus der OE-PS 188 417 ist eine Vorrichtung zur elektrostatischen Beflockung von Gegenständen bekannt, bei der der Beflockungsbehälter insgesamt an Spannung liegt, so daß sich zwischen diesem und dem davon in Abstand befindlichen zu beflockenden Gegenstand Feldlinien ausbilden, denen die einzelnen Flocken auf Grund ihres Dipolcharakters folgen. Einerseits läßt sich auf diese Weise eine nur unbefriedigende Gleichmäßigkeit der Beflockung insbesondere auf der dem Behälter abgewandten Seite des Gegenstandes errei chen, andererseits ist die bekannte Vorrichtung aber für den Betrieb mit pulverförmigen Feststoffen völlig ungeeignet, da weder ein Wirbelbett vorgesehen in noch dem aufzutragenden Material eine elektrostatische Ladung erteilt wird und Pulverteüchen nicht allein durch Influenzwirkung transportiert werden können.From OE-PS 188 417 a device for the electrostatic flocking of objects is known, in which the flocking container is a total of tension, so that between this and the Form field lines which are located at a distance from the object to be flocked, which the individual flakes due to their dipole character. On the one hand, only unsatisfactory uniformity can be achieved in this way the flocking especially on the side of the object facing away from the container chen, on the other hand, the known device is completely for operation with powdery solids unsuitable because neither a fluidized bed is provided in nor an electrostatic one in the material to be applied A charge is issued and powder particles cannot be transported through the influence of influence alone.
Aus der deutschen Patentschrift 9 33 019 ist es im übrigen bereits bekannt Pulver dadurch in den fluidisierten Zustand zu bringen, also ein Wirbelbett zu erzeugen, daß durch die perforierte Bodenplatte eines das Pulver enthaltende Troges Luft eingeblasen wird. Das Aufbringen der Überzugsschicht erfolgt jedoch nicht auf elektrostatischem Wege, sondern durch Eintauchen der zuvor erhitzen Gegenstände in das Wirbelbett. From the German patent specification 9 33 019 it is already known for the rest in the fluidized powder To bring state, so to create a fluidized bed that one through the perforated bottom plate air is blown into the powder-containing trough. However, the coating layer is applied not electrostatically, but by immersing the previously heated objects in the fluidized bed.
Schließlich ist aus der britischen Patentschrift 7 46 179 noch eine Vorrichtung zum Pulverbeschichten von Kabeln bekannt, bei der das zuvor auf eine oberhalb der Schmelztemperatur des verwendeten Pulvers liegende Temperatur erhitzte Kabel durch eine Kammer geführt wird, in der durch einen eingeblasenen starken Gasstrahl eine Pulversuspension aufrechterhalten wird und wobei außerdem zwischen dem Kabel und der Metallkammer eine hohe elektrische Gleichspannung liegt, so daß teilweise auch elektrostatische Pulvertransporterscheinungen auftreten. Nachteilig ist hierbei, daß die Aufladung des Pulvers und dessen durch Elektrostatik bewirkte Bewegung ohne zusätzliche Elektroden allein durch die Aufladung der Metallkammer nicht optimal ist.Finally, from British patent specification 7 46 179 there is also a device for powder coating known from cables, in which the previously set to a temperature above the melting temperature of the powder used lying temperature heated cable is passed through a chamber in which by a blown strong gas jet a powder suspension is maintained and also between the cable and the metal chamber has a high electrical direct voltage, so that in some cases electrostatic powder transport phenomena are also present appear. The disadvantage here is that the charging of the powder and its movement caused by electrostatics without additional Electrodes is not optimal due to the charging of the metal chamber alone.
Der Erfindung liegt die Aufgabe zugrunde, eine Vor richtung der einleitend angegebenen Gattung zu schaf fen, die ein gleichmäßiges Überziehen auch großer und unregelmäßig geformter Gegenstände gestattet.The invention is based on the object of a in the direction of the genus specified in the introduction, which also have a uniform coating of large and irregularly shaped objects permitted.
Diese Aufgabe ist durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelös;.This problem is solved by the features specified in the characterizing part of claim 1.
Vorteilhafte Ausführungsformen sind in den UnU"-ansprüchen angegeben.Advantageous embodiments are in the UnU "claims specified.
In der Zeichnung ist die Vorrichtung nach der Eriinking an Hand beispielsweise gewählter Ausführungsbrmen schematisch vereinfacht dargestellt. Es zeigtIn the drawing the device is after the eriinking shown schematically simplified on the basis of selected exemplary embodiments, for example. It shows
F i g. 1 eine erste Ausführungsform in teilweise geichnittener Seitenansicht, jF i g. 1 shows a first embodiment in partially cutaway Side view, j
F i g· 2 eine weitere Ausführungsfο rm,F i g 2 a further embodiment,
ρ i g. 3 eine weitere Ausführutigsform in teilweise geschnittener Stirnansicht.ρ i g. 3 another embodiment in partially cut Front view.
F i g. 4 eine auseinandergezogene Darstellung einer Ausführungsform zum Überziehen der Innenflächen von Badewannen od. dgl,F i g. Figure 4 is an exploded view of one embodiment for coating the inner surfaces of bathtubs or the like,
F i g. 5 einen Querschnitt durch die Vorrichtung nachF i g. 5 shows a cross section through the device according to FIG
F i g. 6 eine weitere Ausführungsform in teilweise geschnittener Stirnansicht.F i g. 6 shows a further embodiment in a partially sectioned front view.
Die Vorrichtung zur Pulverbeschichtung nach F i g. 1 umfaßt einen Fluidisierungstrog 2, vorzugsweise aus einem elektrisch isolierenden Werkstoff, der über Isolierfüße 8 auf dem Boden ruht, um während des Betriebes eine Ablagerung des Pulvers an den Wänden des Troges zu verhindern. Das Gas zur Fluidisierung, d. h. zur Bildung eines Wirbelbettes 3 aus dem Pulver, beispielsweise Luft, tritt durch eine Rohrleitung 5 in den Boden des Troges ein und strömt dann durch die Poren einer porösen Bodenwandung 4 des Troges 2 über der Mündung der Rohrleitung 5. Diese Bodenwandung 4 kann aus einem Metall oder aus einem Isolierstoff, beispielsweise aus keramischem Material, gefertigt sein. In dem hier dargestellten Beispiel ist die Bodenwandung aus Metall; auf ihr sind die Elektroden 10 angeordnet, deren ionisierende Teile sich in der Nähe des Spiegels des in dem Trog 2 befindlichen Bades 3 aus fluidisiertem Pulver, und zwar unterhalb dieses Spiegels, befinden. Die Elektroden sind über die Bodenwandung 4 mit dem isolierten Pol eines Hochspannungsgenerators 1 verbunden, dessen anderer Pol an Masse Hegt.The device for powder coating according to FIG. 1 comprises a fluidization trough 2, preferably from an electrically insulating material, which rests on the floor via insulating feet 8, in order to prevent it from operating during operation to prevent the powder from depositing on the walls of the trough. The fluidization gas, i. H. to form a fluidized bed 3 from the powder, for example air, passes through a pipe 5 into the Bottom of the trough and then flows through the pores of a porous bottom wall 4 of the trough 2 above The mouth of the pipeline 5. This bottom wall 4 can be made of a metal or an insulating material, for example made of ceramic material. In the example shown here is the bottom wall made of metal; on it the electrodes 10 are arranged, the ionizing parts of which are in the vicinity of the mirror of the bath 3 of fluidized powder located in the trough 2, namely below this level. The electrodes are connected to the insulated pole of a high-voltage generator 1 via the bottom wall 4 connected, the other pole of which is connected to earth.
Die Elektroden 10 bestehen vorzugsweise aus einem Halbleitermaterial mit hohem spezifischen elektrischen Widerstand, und zwar aus den bekannten Gründen als Schutz beim Überspringen eines Funkens infolge einer zufälligen Berührung zwischen den Elektroden und irgendeinem Gegenstand, der mehr oder weniger mit Masse in Verbindung steht. Wenn aber diese Elektroden aus einem den elektrischen Strom gut leitenden Werkstoff bestehen, werden sie mit dem isolierten Pol des Generators 1 über einen Schutzwiderstand verbunden, um die bei einem zufälligen Funkenüberschlag ausgelöste Energie herabzusetzen.The electrodes 10 are preferably made of a semiconductor material with a high electrical specificity Resistance, for the well-known reasons, as protection in the event of a spark jumping as a result of a accidental contact between the electrodes and any object more or less with Ground is connected. But if these electrodes consist of a well-conducting electrical current Material, they are connected to the insulated pole of the generator 1 via a protective resistor, to reduce the energy released in the event of an accidental sparkover.
Die zu überziehenden Gegenstände 7 sind über dem Bad 3 aus dem fluidisierten Pulver angeordnet oder bewegen sich über dasselbe hinweg, aufgehängt an einer Fördervorrichtung 9, die an Masse liegt and dadurch auch die zu überziehenden Gegenstände auf Massepotential bringt. Während sich diese Gegenstände über das Bad 3 aus fluidisiertem Pulver bewegen, werden sie durch elektrostatische Anziehung mit Pulverteilchen 6 bedeckt. Die auf diese Weise überzogenen Gegenstände werden anschließend einer Behandlung unterzogen, bei welcher die Pulverschicht völlig geschmolzen wird.The objects 7 to be coated are arranged or move above the bath 3 made of the fluidized powder across the same, suspended from a conveyor 9, which is connected to ground and thereby also brings the objects to be coated to ground potential. While these items are about move the bath 3 of fluidized powder, they are electrostatic attraction with powder particles 6 covered. The objects coated in this way are then subjected to a treatment, in which the powder layer is completely melted.
Zum Überziehen von Metallbändern oder Gittern in iw großen Mengen kann die Vorrichtung in der Ausführungsform nach Fig. 2 vei wendet werden. Das zu überziehende Metallband oder der Gitterstreifen wird von einer auf Masse liegenden Trommel 13 ab- und nach der Behandlung auf eine weitere Trommel 12 «.< < aufgewickelt. Der Antrieb der Trommeln erfolgi durch eine geeignete, hier nicht dargestellte Vorrichtung Der r.ppenstanc, 14 (Metallband oder Giuerstreücn) l;iii:i über das Bad 3 aus fluidisieriem und ionisiertem Pulver, und zwar in angemessener Höhe über dessen Spiegel. Nach der Pulverbeschichtung läuft das Metallband beispielsweise durch einen Einbrennofen 11. wo das Pulver schmilzt und damit den eigentlichen Überzug des Bandes bildet, bevor dieses auf der Trommel 12 wieder aufgewickelt wird.For covering metal strips or grids in iw the device in the embodiment according to FIG. 2 can be used in large quantities. That too covering metal strip or the grid strip is removed from a drum 13 lying on ground. and after the treatment on another drum 12 ". < <wound up. The drums are driven by a suitable device, not shown here r.ppenstanc, 14 (metal band or Giuerstreücn) l; iii: i via the bath 3 of fluidized and ionized powder, at a reasonable height above its mirror. For example, after powder coating, the metal belt runs through a baking oven 11. where the powder melts and with it the actual coating of the tape forms before this is wound up on the drum 12 again will.
Bei der in F i g. 3 dargestellten Ausführungsform der Vorrichtung befinden sich zu beiden Seiten einer senkrechten Ebene, in welcher sich eine Fördervorrichtung 31 bewegt, zwei Isolierträger 32 und 33 auf Isolierfüßen 34 bzw. 35. Auf jedem dieser Träger 32 und 33 sind in horizontalen Reihen Pulvertröge 36, 37, 38... bzw. 36', 37'. 38'... angebracht. Jedem dieser Tröge 36 usw. bzw. 36' usw. wird Luft zugeführt, um die Fiuidisierung des isolierpulvers zu bewirken. Die Luft tritt über Abzweigungen 39, 40, 41 ... bzw. 39', 40', 41'... einer Druckluftleitung 42 bzw. 42' ein. Im Inneren jedes Troges 36 usw. bzw. 36' usw. sind auf dem porösen Boden 43 Elektroden 44 angeordnet, welche über die Kabel 45 an eine Klemme einer Hochspannungsquelie 46 angeschlossen sind, deren andere Klemme an Masse liegt. An die selbst auf Masse liegende Fördervorrichtung 31 sind mittels leitender Haken 47 die zu überziehenden Gegenstände 48 angehängt, welche zwischen den beiden Trägern bzw. Tafeln 32 und 33 hindurchlaufen. Die Vorrichtung wird dauernd mit Druckluft gespeist und steht ständig unter Spannung, so daß das fluidisiert und ionisierte Pulver ununterbrochen auf die an den Trögen 36, 37, 38 usw. bzw. 36', 37', 38' usw. vorbeilaufenden Gegenstände 48 geschleudert wird. Die Speisung der Tröge mit Pulver kann automatisch durch hier nicht dargestellte Speisetrichter bzw. Schütttrichter erfolgen, wobei die letzteren vorzugsweise von Vorrichtungen zur Konstanthaltung des Pulverspiegels in den Trögen gesteuert werden.In the case of the in FIG. 3 illustrated embodiment of Devices are located on both sides of a vertical plane in which there is a conveyor 31 moved, two insulating supports 32 and 33 on insulating feet 34 and 35, respectively. On each of these supports 32 and 33 are in horizontal rows of powder troughs 36, 37, 38 ... or 36 ', 37'. 38 '... attached. Each of these troughs 36 etc. resp. 36 ', etc., air is supplied to effect the fluidization of the insulating powder. The air passes through branches 39, 40, 41 ... or 39 ', 40', 41 '... of a compressed air line 42 or 42'. Inside each trough 36 etc. or 36 'etc. are arranged on the porous floor 43 electrodes 44, which via the cable 45 to a Terminal of a high-voltage source 46 are connected, the other terminal of which is connected to ground. To the Even the conveying device 31 lying on the ground are the objects to be covered by means of conductive hooks 47 48 attached, which run between the two beams or panels 32 and 33. the The device is continuously fed with compressed air and is constantly under tension, so that it fluidizes and ionized powders continuously flowing past the troughs 36, 37, 38, etc. and 36 ', 37', 38 ', etc., respectively Objects 48 is thrown. The feeding of the troughs with powder can be done automatically through here Feed funnels or pouring funnels, not shown, take place, the latter preferably of devices to keep the powder level constant in the troughs.
Zu der in den F i g. 4 und 5 dargestellten Vorrichtung gehört unter anderen ein Isoliersockel 60 mit einer daraus nach oben hervorstehenden Erhebung 61, an welcher eine bestimmte Anzahl von Trögen 62, 63 und 64. wie sie an Hand der F i g. 1 und 2 beschrieben wurden. angeordnet sind. Diese Tröge laufen ganz um die Erhebung 61 herum, mit Ausnahme desjenigen am Scheitel. Ein zu überziehender Gegenstand 65 wird so angeordnet, daß er die Erhebung 61 mit den Trögen 62, 63 und 64 überdeckt.To the in the F i g. The device shown in FIGS. 4 and 5 includes, among other things, an insulating base 60 with one thereof upwardly protruding elevation 61, on which a certain number of troughs 62, 63 and 64. as shown in FIG. 1 and 2 have been described. are arranged. These troughs run all the way around the elevation 61 around, with the exception of the one at the top of the head. An object to be coated 65 is arranged so that it has the elevation 61 with the troughs 62, 63 and 64 covered.
Wie aus F i g. 5 ersichtlich ist, wird der zu überziehende Gegenstand 65, in diesem Falle eine Badewanne, an leitenden Bugein 66 aufgehängt, die ihrerseits an einem an Masse liegenden Träger 67 eingehakt werden Die elektrischen Leitungen zur Speisung der Ionisatoren der Tröge 62, 63 und 64 sind hier schematisch dar gestellt, während die Zuleitungen für Druckluft mehl dargestellt sind. Der Betrieb erfolgt hier abschnittwei se, d. h. Zuleitung der Druckluft und der hohen Gleich spannung für die lonisiaroren erfolgen nur währenc einer bestimmten Zeitspanne, nachdem der zu überzie hende Gegenstand in die Bearbeitungslage gebrach worden ist.As shown in FIG. 5 can be seen, the object to be covered 65, in this case a bathtub, suspended from conductive bows 66, which in turn are hooked onto a carrier 67 which is connected to ground The electrical lines for feeding the ionizers of troughs 62, 63 and 64 are shown schematically here placed while the supply lines for compressed air flour are shown. The operation takes place here in sections se, d. H. The supply of compressed air and the high DC voltage for the ionizing tubes are only carried out during the period a certain period of time after the object to be covered broke into the processing position has been.
In einer weiteren Ausführungsform, die in V 1 g. ( dargestellt ist, umfaßt die Vorrichtung einen einzige· Trog 80 zur Aufnahme des Isolierpulvers nebsi eine biegsamen i.eitung 81 für die Zufuhr von Druckluft un· einem biegsamen Kabel 82, das an die in das Rad au fluidisiertem Isolierpulver eintauchenden Elektroden angeschlossen ist. Der Trog 80 h\ an dem !.η,;- emc horizontaler Ausleger- S4 an^ehrach;. ,■·- -.-^.irsen )vv, o'.r.em Scr:;.te;i iv> :e/ vt:b'i:vji.p :',; ■ !«"ΓIn a further embodiment, which is described in V 1 g. (As shown, the device comprises a single trough 80 for receiving the insulating powder and a flexible conduit 81 for the supply of compressed air and a flexible cable 82 which is connected to the electrodes immersed in the wheel of fluidized insulating powder Trough 80 h \ on the! .Η,; - emc horizontal boom- S4 an ^ ehrach ;., ■ · - -.- ^. Irsen ) vv, o'.r.em Scr:;. Te; i iv> : e / vt: b'i: vji.p: ',; ■! «" Γ
der vertikalen Führungsschienen 86 verschieben kann, wobei die Mitnahme durch irgendeine geeignete Vorrichtung,
wie z.B. eine Kette 87, erfolgt; sie gestattet eine Auf- und Abwärtsbewegung, deren Größe durch
Endanschläge 88 und 89 einstellbar ist. Die zu überziehenden Gegenstände 90 sind mittels der leitenden Haken
91 an einer an Masse angeschlossenen Fördervorrichtung 92 aufgehängt, die sich parallel zu der Längsachse
des Troges 80 und in geringem Abstand von demselben bewegt. Während dieser Zeit vollführt der
Trog eine Auf- und Abwärtsbewegung in Richtung der Pfeile Fbzw. F, so daß der bei /dargestellte Strahl des
zerstäubten Pulvers die ganze Querfläche 93 des Gegenstandes 90, gegebenenfalls auch einen Teil der unteren
und der oberen Oberfläche bestreicht.
Wenn der Gegenstand an den beiden Querflächen überzogen werden soll, dann kann man denselben natürlich
an einer weiteren Anlage, die symmetrisch zu der soeben beschriebenen angeordnet ist, vorbeilaufen
lassen; man kann den Gegenstand aber auch, nachdem man ihn um 180° gedreht hat, nochmals an der beschriebenen
Anlage vorbeilaufen lassen. Die Versorgung des Troges 80 mit Pulver kann automatisch erfolgen,
beispielsweise am Ende eines Hubes, vorzugsweise am Ende des Aufwärtshubes und mit Hilfe eines Schütttrichters
sowie isolierter Fallrohre, die senkrecht über dem Trog angeordnet sind. In dem Augenblick, wo der
Trog am Ende des Aufwärtshubes ankommt, wird ein Schieber geöffnet, der dann eine bestimmte Menge des
Pulvers ausfließen läßt. Der bewegliche Ausleger 84 kann im übrigen auch mit mehreren Trögen ausgestattet
sein.the vertical guide rails 86 can slide, being carried along by any suitable device, such as a chain 87; it allows an upward and downward movement, the size of which can be adjusted by means of end stops 88 and 89. The objects 90 to be coated are suspended by means of the conductive hooks 91 on a conveyor device 92 which is connected to ground and which moves parallel to the longitudinal axis of the trough 80 and at a small distance therefrom. During this time the trough moves up and down in the direction of arrows F and F, so that the jet of atomized powder shown at / sweeps the entire transverse surface 93 of the object 90, possibly also part of the lower and upper surface.
If the object is to be coated on the two transverse surfaces, it can of course be made to pass a further installation which is arranged symmetrically to the one just described; but you can also, after having rotated it 180 °, let the object run past the described system again. The supply of powder to the trough 80 can take place automatically, for example at the end of a stroke, preferably at the end of the upward stroke and with the aid of a pouring funnel and insulated downpipes which are arranged vertically above the trough. At the moment when the trough arrives at the end of the upward stroke, a slide is opened, which then allows a certain amount of the powder to flow out. The movable arm 84 can also be equipped with several troughs.
Hierzu 4 Blatt ZeichnungenIn addition 4 sheets of drawings
Claims (5)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2294462A GB1046613A (en) | 1962-06-22 | 1962-06-22 | Method and apparatus for the electrostatic power-coating of objects |
| FR905604A FR1338913A (en) | 1962-06-22 | 1962-07-31 | New method and device for electrostatic dusting of objects |
| FR905975A FR1338453A (en) | 1962-06-22 | 1962-08-03 | New method and device for electrostatic coating of objects, using insulating powder |
| FR925370A FR83092E (en) | 1963-02-20 | 1963-02-20 | New method and device for electrostatic dusting of objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE1302426B true DE1302426B (en) | 1976-04-01 |
| DE1302426C2 DE1302426C2 (en) | 1976-11-11 |
Family
ID=27445465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19631302426 Expired DE1302426C2 (en) | 1962-06-22 | 1963-06-11 | DEVICE FOR POWDER-COATING OBJECTS WITH A TROUGH CONTAINING THE POWDER WITH A POROESE BASE PLATE |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3248253A (en) |
| BE (1) | BE633379A (en) |
| CH (1) | CH397481A (en) |
| DE (1) | DE1302426C2 (en) |
| DK (1) | DK114324B (en) |
| FI (1) | FI42179B (en) |
| FR (3) | FR1338913A (en) |
| GB (3) | GB1046613A (en) |
| NL (2) | NL140784B (en) |
| SE (1) | SE319708B (en) |
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| NL135549C (en) * | 1966-04-22 | |||
| NL137205C (en) * | 1966-04-28 | |||
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2370636A (en) * | 1933-03-23 | 1945-03-06 | Minnesota Mining & Mfg | Manufacture of abrasives |
| US2152077A (en) * | 1935-02-06 | 1939-03-28 | Behr Manning Corp | Production of piled surfaces in pattern form |
| US2686141A (en) * | 1951-06-29 | 1954-08-10 | Keyes Fibre Co | Preparation of resin-bearing fibrous pulp |
| US3004861A (en) * | 1956-01-12 | 1961-10-17 | Polymer Corp | Methods and apparatus for applying protective coatings |
| US3032816A (en) * | 1957-11-07 | 1962-05-08 | Polymer Corp | Coating process and apparatus |
| US2844489A (en) * | 1957-12-20 | 1958-07-22 | Knapsack Ag | Fluidized bed coating process |
| US3008826A (en) * | 1958-03-06 | 1961-11-14 | Xerox Corp | Xerographic development |
| US3019126A (en) * | 1959-03-24 | 1962-01-30 | United States Steel Corp | Method and apparatus for coating metal strip and wire |
-
0
- NL NL293990D patent/NL293990A/xx unknown
- FR FR83092D patent/FR83092A/fr not_active Expired
- BE BE633379D patent/BE633379A/xx unknown
-
1962
- 1962-06-22 GB GB2294462A patent/GB1046613A/en not_active Expired
- 1962-07-31 FR FR905604A patent/FR1338913A/en not_active Expired
- 1962-08-03 FR FR905975A patent/FR1338453A/en not_active Expired
-
1963
- 1963-06-11 DE DE19631302426 patent/DE1302426C2/en not_active Expired
- 1963-06-12 CH CH731463A patent/CH397481A/en unknown
- 1963-06-13 US US28755463 patent/US3248253A/en not_active Expired - Lifetime
- 1963-06-13 DK DK280963A patent/DK114324B/en unknown
- 1963-06-13 SE SE655263A patent/SE319708B/xx unknown
- 1963-06-13 NL NL293990A patent/NL140784B/en not_active IP Right Cessation
- 1963-06-14 FI FI122063A patent/FI42179B/fi active
- 1963-08-02 GB GB3075163A patent/GB1012364A/en not_active Expired
-
1964
- 1964-02-20 GB GB713764A patent/GB1043443A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1046613A (en) | 1966-10-26 |
| DE1302426C2 (en) | 1976-11-11 |
| FR83092A (en) | 1900-01-01 |
| FI42179B (en) | 1970-02-02 |
| FR1338453A (en) | 1963-09-27 |
| BE633379A (en) | 1900-01-01 |
| CH397481A (en) | 1965-08-15 |
| DK114324B (en) | 1969-06-16 |
| US3248253A (en) | 1966-04-26 |
| GB1012364A (en) | 1965-12-08 |
| SE319708B (en) | 1970-01-19 |
| NL140784B (en) | 1974-01-15 |
| NL293990A (en) | 1900-01-01 |
| FR1338913A (en) | 1963-10-04 |
| GB1043443A (en) | 1966-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 |