DE1302426C2 - DEVICE FOR POWDER-COATING OBJECTS WITH A TROUGH CONTAINING THE POWDER WITH A POROESE BASE PLATE - Google Patents
DEVICE FOR POWDER-COATING OBJECTS WITH A TROUGH CONTAINING THE POWDER WITH A POROESE BASE PLATEInfo
- Publication number
- DE1302426C2 DE1302426C2 DE19631302426 DE1302426A DE1302426C2 DE 1302426 C2 DE1302426 C2 DE 1302426C2 DE 19631302426 DE19631302426 DE 19631302426 DE 1302426 A DE1302426 A DE 1302426A DE 1302426 C2 DE1302426 C2 DE 1302426C2
- 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.)
- Expired
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
-
- 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
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 Gleichspannungsqueile 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 Internal 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 Pulver- 6S teilchen 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 ober halb 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 verhältnis mäßig einfach geformte Gegenstände wie Drähte, Bän der 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 letz tere wegen der unwirtschaftlich werdenden, erforderlichen Größe des Tauchbehälters oder Troges. Such a device is known from US Pat. No. 3,019,126. It is used to provide a metal strip or the like with a thin powder coating by dipping it into the fluidized bed. The powder particles 6 S follow namely directly extending from the electrodes to the metal strip lines of force, wherein each powder particle is sufficient in view of the short distance between a relatively low charge, so that it does not require the formation of an ionisation at the electrodes. In this known device, the electrodes are only partially immersed in 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 being released into the space above half of the fluidized bed . The disadvantage of this known device is that the sealing problem when the object to be coated is brought out of the fluidized bed can only be solved satisfactorily for relatively moderately simple objects such as wires, ribbons and the like . Above all, however, it is important that neither objects of complicated shapes nor objects of large dimensions are suitable for the immersion process, namely the former due to the lack of a sufficiently uniform coating and the latter because of the increasingly 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 GriMd ihres Dipolcharakters folgen. Einerseits läßt sich auf diese Weise eine nur unbefriedigende Gleichmäßigkeit der Beflockung insbesondere auf der dem Behälter abgewandten Seite des Gegenstandes erreichen, andererseits ist die bekannte Vorrichtung aber für den Betrieb mit pulverförmigen Feststoffen völlig ungeeignet, da weder ein Wirbelbett vorgesehen ist noch dem aufzutragenden Material eine elektrostatische Ladung erteilt wird und Pulverteilchen nicht allein durch Influenzwirkung transportiert werden können.From OE-PS 188 417 a device is for electrostatic flocking of objects known in which the flocking container as a whole Voltage is so that between this and the object to be flocked located at a distance therefrom Form field lines, which the individual flakes follow due to their dipole character. On the one hand, lets In this way, the uniformity of the flocking is only unsatisfactory, especially on the Reach container facing away from the side of the object, on the other hand, the known device is completely unsuitable for operation with powdery solids, as neither a fluidized bed is provided nor is an electrostatic charge applied to the material to be applied and powder particles not alone can be transported by influenza.
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 eingeblascn 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 also already known to thereby fluidize powder in the To bring state, so to produce 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 eirgeblasenen 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 an egg-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 Vorrichtung der einleitend angegebenen Gattung zu schaffen, die ein gleichmäßiges Überziehen auch großer und unregelmäßig geformter Gegenstände gestattet.The invention is based on the object of creating a device of the type specified in the introduction, which allows even large and irregularly shaped objects to be coated evenly.
Diese Aufgabe ist durch die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.
Vorteilhafte Ausführungsformen sind in den Unteransprüchen angegeber.Advantageous embodiments are given in the subclaims.
In der Zeichnung ist die Vorrichtung nach der Erfindung an Hand beispielsweise gewählter Ausführungsformen schematisch vereinfacht dargestellt Es zeigtIn the drawing, the device according to the invention is shown in a schematically simplified manner using, for example, selected embodiments
F i g. 1 eine erste Ausführungsform in teilweise geschnittener Seitenansicht,F i g. 1 shows a first embodiment in a partially sectioned side view,
F i g. 3 eine weitere Ausführungsform in teilweise geschnittener Stirnansicht,F i g. 3 a further embodiment in a partially sectioned front view,
über das Bad 3 aus fluidisierfcm 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 Oberzug des Bandes bildet, bevor dieses auf der Trommel 12 wieder aufgewickelt wird.via the bath 3 of fluidized and ionized powder, at an appropriate height above its mirror. After the powder coating, the metal strip runs, for example, through a baking oven 11, where the powder melts and thus forms the actual upper layer of the tape before it is rewound on the drum 12.
Bei der in F i g. 3 dargestellten Ausführungsform der Vorrichtung befinden sich zu beiden Seiten einer senk*In the case of the in FIG. 3 embodiment of the device shown are located on both sides of a vertical *
Ausführungsform zum Überziehen der Innenwachen io rechten Ebene, in welcher sich eine Fördervorrichtung Embodiment for covering the interior guards in the right plane in which there is a conveyor device
von Badewannen od. dglof bathtubs or the like
F i g. 5 einen Querschnitt durch die Vorrichtung nach F ig. 4,F i g. 5 shows a cross section through the device according to FIG. 4,
F i g. 6 eine weitere Ausführungsform in teilweise geschnittener StirnansichtF 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 wäh.end des Betrie- 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 Fluidisierung des Isolierpulvers zu bewirken. Die Luft tritt über Abzwei gungen 39, 40, 41... bzw. 39', 40', 41'... einer Druck luftleitung 42 bzw. 42' ein. Im Inneren jedes Troges 36 usw. bzw. 36' usw. sind auf dem porösen Boden 43 Elek- The device for powder coating according to FIG. 1 comprises a fluidization trough 2, preferably made of an electrically insulating material, which rests on the floor via insulating feet 8, and during operation 31 two insulating supports 32 and 33 are moved on insulating feet 34 and 35, respectively. On each of these supports 32 and 33 Powder troughs 36, 37, 38 ... or 36 ', 37', 38 '... are mounted in horizontal rows. Each of these troughs 36 etc. or 36' etc. is supplied with air to effect the fluidization of the insulating powder. The air enters via branches 39, 40, 41 ... or 39 ', 40', 41 '... a compressed air line 42 and 42' . Inside each trough 36 etc. or 36 ' etc. are on the porous floor 43 elec-
bes eine Ablagerung des Pulvers an den Wänden des 20 trcden 44 angeordnet, weiche über die Kabel 45 an einebes a deposit of the powder is arranged on the walls of the 20 trcden 44, soft via the cables 45 to a
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 Klemme einer Hochspannungsquelle 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 GePrevent troughs. The fluidization gas, i. H. to form a fluidized bed 3 from the powder, for example Air, enters the bottom of the trough through a pipe 5 and then flows through the pores 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 Ge to be covered by means of conductive hooks 47
einer porösen Bodenwandung 4 des Troges 2 über der 25 genstände 48 angehängt, welche zwischen den beiden Mündung der Rohrleitung 5. Diese Bodenwandung 4 Trägern bzw. Tafeln 32 und 33 hindurchlaufen. Diea porous bottom wall 4 of the trough 2 over the 25 objects 48 attached, which between the two The mouth of the pipeline 5. This bottom wall 4 supports or panels 32 and 33 run through it. the
Vorrichtung wird dauernd mit Druckluft gespeist und steht ständig unter Spannung, so daß das fluidisierteDevice is continuously fed with compressed air and is constantly under tension, so that the fluidized
kann aus einem Metall oder aus einem Isolierstoff, beispielsweise aus keramischem Material, gefertigt sein. In dem hier dargestellten Beispiel ist die Bodenwandung und ionisierte Pulver ununterbrochen auf die an dencan be made of a metal or an insulating material, for example a ceramic material. In In the example shown here, the bottom wall and ionized powder are continuously applied to the
aus Metall; auf ihr sind die Elektroden 10 angeordnet, 30 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. Schütttrichier erfolgen, wobei die letzteren vorzugsweise von Vorrich-35 tungen zur Konstanthaltung des Pulverspiegels in den Trögen gesteuert werden.made of metal; The electrodes 10 are arranged on it, 30 troughs 36, 37, 38 etc. or 36 ', 37', 38 'etc. passing by Objects 48 is thrown. The feeding of the troughs with powder can be done automatically through here Feed funnels or pouring funnels (not shown) are carried out, the latter preferably from Vorrich-35 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 Isoliersocke! 60 mit einer daraus nach oben hervorstehenden Erhebung 61, an wel-To the in the F i g. 4 and 5 shown device includes, among other things, an insulating sock! 60 with one of them upwardly protruding elevation 61, at which
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 liegt.whose ionizing parts are near 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 ground.
Die Elektroden 10 bestehen vorzugsweise aus einem Halbleitermaterial mit hohem spezifischen elektrischen Widerstand, und zwar aus den bekannten Gründen alsThe electrodes 10 are preferably made of a semiconductor material with a high electrical specificity Resistance, for the reasons known as
Schutz beim Überspringen eines Funkens infolge einer 40 eher eine bestimmte Anzahl von Trögen 62, 63 und 64,Protection when a spark is skipped as a result of a 40 rather a certain number of troughs 62, 63 and 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 επί Scheitel. Ein zu überziehender Gegenstand 65 wird so angeordnet, daß er die Erhebung 61 mit den Trögen 62. 63 und 64 überdeckt.as shown in FIG. 1 and 2 are arranged. These troughs run all the way around the elevation 61 around, with the exception of the επί vertex. An object 65 to be coated is arranged so that that it covers the elevation 61 with the troughs 62, 63 and 64.
Wie aus F i g. 5 ersichtlich ist. wird der zu überziehende Gegenstand 65, in diesem Falle eine Badewanne an leitenden Bügeln 66 aufgehängt, die ihrerseits arAs shown in FIG. 5 can be seen. becomes the one to be overdrawn Item 65, in this case a bathtub, is suspended from conductive brackets 66, which in turn ar
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 Generato 's 1 über einen Schutzwiderstand verbunden, um die bei einem zufälligen Funkenüberschlag ausgelöste Energie herabzusetzen.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 isolated 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 demThe objects to be covered 7 are above the
wegen sich über dasselbe hinweg, aufgehängt an einer Fördervorrichtung 9, die an Masse liegt und dadurch auch die zu überziehenden Gegenstände auf Massepotential bringt. Während sich diese Gegenstände überbecause of getting over the same thing, hanging on one Conveying device 9, which is connected to ground and thereby also the objects to be coated on ground potential brings. While these items are about
Bad 3 aus dem fluidisierten Pulver angeordnet oder be- 5° einem an Masse liegenden Träger 67 eingehakt werdenBath 3 made of the fluidized powder is arranged or hooked into a carrier 67 lying on the ground
Die elektrischen Leitungen zur Speisung der lonisato ren der Tröge 62, 63 und 64 sind hier schematisch dar gestellt, während die Zuleitungen für Druckluft nichThe electrical lines for feeding the lonisato Ren the troughs 62, 63 and 64 are shown here schematically, while the supply lines for compressed air nich
iv-nLiai Di1Ii6I. ..uL.v..« „.,.,, v..vov v^V6^1,o.u.. w dargestellt sind. Der Betrieb erfolgt hier abschnittweiiv-nLiai Di 1 Ii 6 I. ..uL.v .. «".,. ,, v..vov v ^ V 6 ^ 1 , ou. w are shown. The operation takes place here in sections
das Bad 3 aus fluidisiertem Pulver bewegen, werden sie 55 se. d. h. Zuleitung der Druckluft und der hohen Gleichmove the bath 3 of fluidized powder, they will 55 se. d. H. Supply of compressed air and the high equal
spannung für die lonisiatoren erfolgen nur währenc einer bcsiimmten Zeitspanne, nachdem der zu überzie hende Gegenstand in die Bearbeitungslage gebrach worden ist.Voltage for the ionizers is only applied for a certain period of time after they are to be covered The current object has been brought into the processing position.
In einer weiteren Ausführungsform, die in F i gJ dargestellt ist, umfaßt die Vorrichtung einen einzige! Trog 80 /ur Aufnahme des Isolierpulvers nebst eine biegsamen Leitung 81 für die Zufuhr von Druckluft uiv einem biegsamen Kabel 82, das an die in das Bad au lluidisiertem isolierpulver eintauchenden Elektroden 8 angeschlossen ist. Der Trog 80 ist an dem Ende eine horizontalen Auslegers 84 angebracht, der seinerseit mit einem Schlitten 85 fest verbunden ist, der sich längIn a further embodiment, which is shown in FIG is shown, the device comprises a single! Trough 80 / ur receiving the insulating powder together with a flexible line 81 for the supply of compressed air uiv a flexible cable 82, which is connected to the in the bath au Electrodes immersed in fluidized insulating powder 8 connected. The trough 80 is attached to the end of a horizontal bracket 84 which is in turn is firmly connected to a carriage 85, which extends lengthways
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.covered with powder particles 6 by electrostatic attraction. 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 großen Mengen kann die Vorrichtung in der Ausführungsform nach F i g. 2 verwendet 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 erfolgt durch eine geeignete, hier nicht dargestellte Vorrichtung. Der Geeenstand 14 (Metallband oder Gitterstreifen) läuftFor coating metal strips or grids in large quantities, the device in embodiment according to FIG. 2 can be used. The metal tape or the grid strip to be coated is removed from a drum 13 lying on ground and, after the treatment, onto a further drum 12 wound up. The drums are driven by a suitable device, not shown here. Of the Approval 14 (metal band or grid strip) is running
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 Querflächenthe vertical guide rails 86 can move, the entrainment by any suitable device, such as. B. a chain 87, takes place; it allows an upward and downward movement, the size of which is adjustable by end stops 88 and 89. The objects 90 to be covered are suspended by means of the conductive hook 91 on a conveyor 92 connected to ground, which is parallel to the longitudinal axis of the trough 80 and at a small distance from During this time the trough performs an upward and downward movement in the direction of arrows F and F, so that the jet of atomized powder shown at / covers the entire transverse surface 93 of the object 90, possibly also part of the lower and upper surface When the object is coated on the two transverse surfaces 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, nachdemis to be covered, then you can of course the same on another system, which is symmetrical to the one just described is arranged to pass; but you can also use the object after 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 Schiittit was rotated by 180 ° and let it pass 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 upstroke and with the help of a schiitt trichters 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 84funnel and insulated downpipes that run vertically across are arranged in the trough. The moment the trough arrives at the end of the upstroke, a Slide open which then allows a certain amount of powder to flow out. The movable arm 84
>S kann im übrigen auch mit mehreren Trögen ausgestattet sein.> S can also be equipped with several troughs.
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 DE1302426B (en) | 1976-04-01 |
| DE1302426C2 true 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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| US3503775A (en) * | 1966-04-12 | 1970-03-31 | Nat Steel Corp | Method of preparing metal coated metallic substrates |
| NL135549C (en) * | 1966-04-22 | |||
| NL137205C (en) * | 1966-04-28 | |||
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| 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 |
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| 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
- BE BE633379D patent/BE633379A/xx unknown
- FR FR83092D patent/FR83092A/fr not_active Expired
- NL NL293990D patent/NL293990A/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 DK DK280963A patent/DK114324B/en unknown
- 1963-06-13 NL NL293990A patent/NL140784B/en not_active IP Right Cessation
- 1963-06-13 SE SE655263A patent/SE319708B/xx unknown
- 1963-06-13 US US28755463 patent/US3248253A/en not_active Expired - Lifetime
- 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 |
|---|---|
| FR1338453A (en) | 1963-09-27 |
| FR83092A (en) | 1900-01-01 |
| NL293990A (en) | 1900-01-01 |
| FI42179B (en) | 1970-02-02 |
| SE319708B (en) | 1970-01-19 |
| US3248253A (en) | 1966-04-26 |
| GB1046613A (en) | 1966-10-26 |
| FR1338913A (en) | 1963-10-04 |
| GB1043443A (en) | 1966-09-21 |
| GB1012364A (en) | 1965-12-08 |
| NL140784B (en) | 1974-01-15 |
| DE1302426B (en) | 1976-04-01 |
| DK114324B (en) | 1969-06-16 |
| CH397481A (en) | 1965-08-15 |
| BE633379A (en) | 1900-01-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 |