EP0769327A2 - Device for powder coating - Google Patents

Device for powder coating Download PDF

Info

Publication number
EP0769327A2
EP0769327A2 EP96112635A EP96112635A EP0769327A2 EP 0769327 A2 EP0769327 A2 EP 0769327A2 EP 96112635 A EP96112635 A EP 96112635A EP 96112635 A EP96112635 A EP 96112635A EP 0769327 A2 EP0769327 A2 EP 0769327A2
Authority
EP
European Patent Office
Prior art keywords
powder
housing
devices
injector
powder conveying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96112635A
Other languages
German (de)
French (fr)
Other versions
EP0769327A3 (en
Inventor
Guido Rutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gema Switzerland GmbH
Original Assignee
Gema Switzerland GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gema Switzerland GmbH filed Critical Gema Switzerland GmbH
Publication of EP0769327A2 publication Critical patent/EP0769327A2/en
Publication of EP0769327A3 publication Critical patent/EP0769327A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B05B7/1472—Powder extracted from a powder container in a direction substantially opposite to gravity by a suction device dipped into the powder

Definitions

  • the invention relates to a device for powder coating according to the preamble of claim 1.
  • Powder coating devices of this type are known from EP-B-0 184 994 and DE-A-38 27 014, 40 12 190 and 40 21 674.
  • the containers from which the powder is sucked pneumatically and conveyed to a spraying device can be so-called containers in which the powder is delivered from the powder manufacturer to the powder user.
  • the powder user sprays the powder onto objects to be coated and then melts the powder onto the coated object by heating.
  • the object of the invention is to simplify the simultaneous use of a plurality of powder conveying devices in the same container and at the same time to reduce the time required for a color change.
  • the device for powder coating can be immersed in a container together with all powder conveying devices either by their own weight or by hand or by a guide device or a lowering-lifting device in order to suck off powder therein.
  • the powder conveyors can pneumatically convey the extracted powder to sprayers or to one or more other containers or to other locations.
  • the powder coating device according to the invention shown in the drawings has a housing 4 and five powder conveying devices 2 accommodated therein. More, for example ten powder conveying devices 2 can also be accommodated in the housing 4.
  • the powder conveying devices 2 are arranged in parallel next to one another and extend essentially over their entire length within the housing 4 in which they are fastened.
  • the housing 4 consists of a housing wall 6 formed from a square tube, an upper connection plate 8, a lower connection plate 10 and screws 12 with which the connection plates 8 and 10 are detachably fastened to the housing wall 6.
  • the two connection plates 8 and 10 are partially inserted into the end pipe ends of the housing wall 6, so that their outer peripheral surfaces are flush with one another.
  • the flow paths of the powder conveying devices 2 extend through the two connection plates 8 and 10.
  • Each powder conveying device 2 is of identical design and has a suction head 20 with an interchangeably inserted injector nozzle 22, an injector tube 24 acting as an injector catch nozzle, a powder tube 26 and a hose connection piece 28, which are arranged one after the other axially along a center line 30.
  • the suction head 20 protrudes below from the lower connection plate 4, in which it is inserted removable.
  • the injector nozzle 22 can be replaced when the suction head 20 is removed from the lower connection plate 4.
  • a bore 32 serving as a powder suction inlet extends from the outside of the suction head into a chamber surrounding the injector nozzle 22, in which a compressed air conveying air flow flowing from the injector nozzle 22 into the injector tube 24 generates a vacuum and thereby sucks powder from the powder container 5 through the powder suction inlet 32 and then conveys the powder through the injector tube 24, the powder tube 26 and the hose connector 28 to a location, not shown, for example a spraying device or another container.
  • the powder tube 26 is inserted at its ends into a through hole 34 of the upper connection plate 8 and into a through hole 36 of the lower connection plate 10 in a powder-tight manner.
  • the injector tube 24 is inserted into the through bore 34 of the lower connection plate 10 and is located between the suction head 20 and the powder tube 26 attached to it.
  • a compressed air tube 38 is inserted with its ends into through holes 40 and 42 of the two connection plates 8 and 4 in a compressed air-tight manner and via a connecting piece 44 screwed into the associated through bore 40 from the outside and a hose 46 can be connected to a compressed air source (not shown) in order to supply compressed air to the injector nozzle 22.
  • one or more additional ones Compressed air tubes 48 can be inserted in bores 50 and 52 in a compressed air-tight manner in order to supply additional air into the injector tube 24 and / or the vacuum space, which adjoins the injector nozzle 22 and in which the conveying air flow of this injector nozzle 22 generates a vacuum.
  • This additional air can be supplied from the same or a different compressed air source via a further connecting piece 54 and a further compressed air hose 58 through the bore 50 in the upper connecting plate 8 to the further compressed air pipe 48.
  • Tubes may be used in place of tubes 26, 38, 48, and tubes may be used in place of tubes 46, 58.
  • the injector which essentially consists of the injector nozzle 22 and the injector tube 24, is located at the lower and thus at the upstream end of the powder tube 26.
  • the injector can be located on the Upper and thus at the downstream end of the powder tube 26, similar to what is known from DE-A 40 12 190 and 40 21 674 and EP-B-0 184 994.
  • the powder tube 26 has the function of a riser tube or powder suction tube.
  • the housing 4 encloses all parts of the powder conveying devices 2 in a powder-tight manner, with the exception of their powder suction inlet 32 at the lower end and with one exception of their connecting elements 28, 44 and 54 for connecting an external powder line and external compressed air lines.
  • the powder conveying devices 2 can convey the powder to different spraying devices or to other locations, for example into another container or in parallel into different containers.
  • the invention has the advantage that two or more, e.g. five or ten or twenty, powder conveyors 2 can be immersed together as one unit in a single powder container, either manually or automatically, and that the powder conveyors 2 are attached to most of them do not come into contact with powder on the outside.
  • All parts of the powder conveying devices 2 are easily detachably connected to the connecting plates 8 and 10, preferably only by means of a plug connection, and to disassemble the entire device only one of the two connecting plates 8 or 10 needs to be separated from the housing wall 6 in order to disassemble the powder conveying devices or, conversely, to assemble.

Abstract

The device comprises several powder conveyor devices (2) provided to supply the powder from the same container. They are stored and fixed in one housing (4). The housing encloses powder-tight all these conveyor devices at least round their parts which immerse in the powder container. The exception is the powder suction inlet (32) of the devices in which the devices suck powder in from the container. The housing and all the powder conveyor devices fixed therein form together one structural unit which can be immersed together and simultaneously with the devices into the same container. The powder conveyor devices can have a rod-like oblong shape with powder suction inlet at the lower end.

Description

Die Erfindung betrifft eine Vorrichtung zur Pulverbeschichtung gemäß dem Oberbegriff von Anspruch 1.The invention relates to a device for powder coating according to the preamble of claim 1.

Vorrichtungen zur Pulverbeschichtung dieser Art sind aus den EP-B-0 184 994 und den DE-A-38 27 014, 40 12 190 und 40 21 674 bekannt.Powder coating devices of this type are known from EP-B-0 184 994 and DE-A-38 27 014, 40 12 190 and 40 21 674.

Die Behälter, aus welchen das Pulver pneumatisch abgesaugt und zu einer Sprühvorrichtung gefördert wird, können sogenannte Gebinde sein, in welchen das Pulver vom Pulverhersteller zum Pulveranwender geliefert wird. Der Pulveranwender sprüht das Pulver auf Gegenstände, die zu beschichten sind, und schmilzt dann durch Erhitzung das Pulver auf den beschichteten Gegenstand.The containers from which the powder is sucked pneumatically and conveyed to a spraying device can be so-called containers in which the powder is delivered from the powder manufacturer to the powder user. The powder user sprays the powder onto objects to be coated and then melts the powder onto the coated object by heating.

Zur Zufuhr von Pulver aus einem einzigen Behälter zu mehreren Sprühvorrichtungen, sogenannten Sprühpistolen, ist es wünschenswert, mehrere Pulverfördervorrichtungen gleichzeitig in den Behälter einzutauchen.In order to supply powder from a single container to several spray devices, so-called spray guns, it is desirable to immerse several powder conveyors in the container at the same time.

Bei einem Wechsel der Pulversorte (Farbwechsel) müssen nicht nur die Pulverleitungen, sondern auch die Pulverfördervorrichtungen an ihren Außenseiten sehr gründlich gesäubert werden, damit das neue Pulver nicht durch Pulverpartikel des zuvor verwendeten Pulvers verunreinigt wird.When changing the powder type (color change), not only the powder lines, but also the powder conveying devices on the outside must be cleaned very thoroughly so that the new powder is not contaminated by powder particles of the previously used powder.

Durch die Erfindung soll die Aufgabe gelöst werden, die gleichzeitige Benutzung von mehreren Pulverfördervorrichtungen im gleichen Behälter zu vereinfachen und gleichzeitig die für einen Farbwechsel erforderliche Zeit zu reduzieren.The object of the invention is to simplify the simultaneous use of a plurality of powder conveying devices in the same container and at the same time to reduce the time required for a color change.

Diese Aufgabe wird gemäß der Erfindung durch die Merkmale von Anspruch 1 gelöst.This object is achieved according to the invention by the features of claim 1.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Die Vorrichtung zur Pulverbeschichtung kann gemäß der Erfindung mit allen Pulverfördervorrichtungen gemeinsam entweder durch ihr Eigengewicht oder von Hand oder durch eine Führungsvorrichtung oder eine Senk-Hub-Vorrichtung in einen Behälter eingetaucht werden, um darin Pulver abzusaugen. Die Pulverfördervorrichtungen können das abgesaugte Pulver zu Sprühvorrichtungen oder in einen oder in mehrere andere Behälter oder zu anderen Stellen pneumatisch fördern.According to the invention, the device for powder coating can be immersed in a container together with all powder conveying devices either by their own weight or by hand or by a guide device or a lowering-lifting device in order to suck off powder therein. The powder conveyors can pneumatically convey the extracted powder to sprayers or to one or more other containers or to other locations.

Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In den Zeichnungen zeigen schematisch

Fig. 1
einen horizontal abgebrochenen Vertikalschnitt durch eine Vorrichtung zur Pulverbeschichtung nach der Erfindung mit zwei nebeneinander angeordneten Pulverfördervorrichtungen,
Fig. 2
eine Draufsicht auf eine abgewandelte Ausführungsform der Vorrichtung von Fig. 1, in der Ebene II - II von Fig. 1 gesehen, mit fünf hintereinander angeordneten Pulverfördervorrichtungen,
Fig. 3
eine Querschnittsansicht der Ausführungsform von Fig. 2 in der Ebene III - III von Fig. 1 gesehen.
The invention is described below with reference to the drawings using a preferred embodiment as an example. In the drawings show schematically
Fig. 1
3 shows a horizontally broken vertical section through a device for powder coating according to the invention with two powder conveying devices arranged next to one another,
Fig. 2
1, seen in the plane II - II of FIG. 1, with five powder conveying devices arranged one behind the other,
Fig. 3
a cross-sectional view of the embodiment of FIG. 2 in the plane III - III of FIG. 1 seen.

Die in den Zeichnungen dargestellte Vorrichtung zur Pulverbeschichtung nach der Erfindung hat ein Gehäuse 4 und fünf darin untergebrachte Pulverfördervorrichtungen 2. In dem Gehäuse 4 können auch mehr, beispielsweise zehn Pulverfördervorrichtungen 2 untergebracht sein. Die Pulverfördervorrichtungen 2 sind parallel nebeneinander angeordnet und erstrecken sich im wesentlichen über ihre gesamte Länge innerhalb des Gehäuses 4, in welchem sie befestigt sind.The powder coating device according to the invention shown in the drawings has a housing 4 and five powder conveying devices 2 accommodated therein. More, for example ten powder conveying devices 2 can also be accommodated in the housing 4. The powder conveying devices 2 are arranged in parallel next to one another and extend essentially over their entire length within the housing 4 in which they are fastened.

Das Gehäuse 4 besteht aus einer aus einem Vierkantrohr gebildeten Gehäusewand 6, einer oberen Anschlußplatte 8, einer unteren Anschlußplatte 10 und Schrauben 12, mit welchen die Anschlußplatten 8 und 10 an der Gehäusewand 6 lösbar befestigt sind. Die beiden Anschlußplatten 8 und 10 sind in die stirnseitigen Rohrenden der Gehäusewand 6 teilweise eingesetzt, so daß ihre äußeren Umfangsflächen miteinander fluchten.The housing 4 consists of a housing wall 6 formed from a square tube, an upper connection plate 8, a lower connection plate 10 and screws 12 with which the connection plates 8 and 10 are detachably fastened to the housing wall 6. The two connection plates 8 and 10 are partially inserted into the end pipe ends of the housing wall 6, so that their outer peripheral surfaces are flush with one another.

Die Strömungswege der Pulverfördervorrichtungen 2 erstrecken sich durch die beiden Anschlußplatten 8 und 10 hindurch.The flow paths of the powder conveying devices 2 extend through the two connection plates 8 and 10.

Jede Pulverfördervorrichtung 2 ist gleich ausgebildet und hat einen Ansaugkopf 20 mit einer darin auswechselbar eingesetzten Injektordüse 22, ein als Injektorfangdüse wirkendes Injektorrohr 24, ein Pulverrohr 26 und einen Schlauch-Anschlußstutzen 28, welche in dieser Reihenfolge nacheinander axial längs einer Mittellinie 30 angeordnet sind. Der Ansaugkopf 20 ragt unten aus der unteren Anschlußplatte 4 heraus, in welche er abziehbar eingesteckt ist. Die Injektordüse 22 kann ausgetauscht werden, wenn der Ansaugkopf 20 von der unteren Anschlußplatte 4 abgezogen wird. Durch den Ansaugkopf 20 erstreckt sich schräg zur Mittellinie 30 eine als Pulverabsaugeinlaß dienende Bohrung 32 von der Außenseite des Ansaugkopfes bis in eine die Injektordüse 22 umgebende Kammer, in welcher ein von der Injektordüse 22 in das Injektorrohr 24 strömender Druckluft-Förderluftstrom einen Unterdruck erzeugt und dadurch aus dem Pulverbehälter 5 durch den Pulverabsaugeinlaß 32 hindurch Pulver ansaugt und dann das Pulver durch das Injektorrohr 24, das Pulverrohr 26 und den Schlauch-Anschlußstutzen 28 zu einer nicht dargestellten Stelle, zum Beispiel einer Sprühvorrichtung oder einen anderen Behälter fördert. Das Pulverrohr 26 ist an seinen Enden in eine Durchgangsbohrung 34 der oberen Anschlußplatte 8 und in eine Durchgangsbohrung 36 der unteren Anschlußplatte 10 pulverdicht eingesteckt. Das Injektorrohr 24 ist in die Durchgangsbohrung 34 der unteren Anschlußplatte 10 eingesteckt und befindet sich zwischen dem auf ihn aufgesteckten Ansaugkopf 20 und dem Pulverrohr 26. Ein Druckluftrohr 38 ist mit seinen Enden in Durchgangsbohrungen 40 und 42 der beiden Anschlußplatten 8 und 4 druckluftdicht eingesteckt und über einen von außen in die zugehörige Durchgangsbohrung 40 eingeschraubten Anschlußstutzen 44 und einen Schlauch 46 mit einer nicht dargestellten Druckluftquelle verbindbar, um der Injektordüse 22 Druckluft zuzuführen. In gleicher Weise wie dieses Druckluftrohr 38 können ein oder mehrere zusätzliche Druckluftrohre 48 in Bohrungen 50 und 52 druckluftdicht eingesteckt sein, um Zusatzluft in das Injektorrohr 24 und/oder den Unterdruckraum zuzuführen, welcher an die Injektordüse 22 angrenzt und in welchem der Förderluftstrom dieser Injektordüse 22 einen Unterdruck erzeugt. Diese Zusatzluft kann von der gleichen oder einer anderen Druckluftquelle über einen weiteren Anschlußstutzen 54 und einen weiteren Druckluftschlauch 58 durch die Bohrung 50 in der oberen Anschlußplatte 8 dem weiteren Druckluftrohr 48 zugeführt werden.Each powder conveying device 2 is of identical design and has a suction head 20 with an interchangeably inserted injector nozzle 22, an injector tube 24 acting as an injector catch nozzle, a powder tube 26 and a hose connection piece 28, which are arranged one after the other axially along a center line 30. The suction head 20 protrudes below from the lower connection plate 4, in which it is inserted removable. The injector nozzle 22 can be replaced when the suction head 20 is removed from the lower connection plate 4. Through the suction head 20, obliquely to the center line 30, a bore 32 serving as a powder suction inlet extends from the outside of the suction head into a chamber surrounding the injector nozzle 22, in which a compressed air conveying air flow flowing from the injector nozzle 22 into the injector tube 24 generates a vacuum and thereby sucks powder from the powder container 5 through the powder suction inlet 32 and then conveys the powder through the injector tube 24, the powder tube 26 and the hose connector 28 to a location, not shown, for example a spraying device or another container. The powder tube 26 is inserted at its ends into a through hole 34 of the upper connection plate 8 and into a through hole 36 of the lower connection plate 10 in a powder-tight manner. The injector tube 24 is inserted into the through bore 34 of the lower connection plate 10 and is located between the suction head 20 and the powder tube 26 attached to it. A compressed air tube 38 is inserted with its ends into through holes 40 and 42 of the two connection plates 8 and 4 in a compressed air-tight manner and via a connecting piece 44 screwed into the associated through bore 40 from the outside and a hose 46 can be connected to a compressed air source (not shown) in order to supply compressed air to the injector nozzle 22. In the same way as this compressed air tube 38, one or more additional ones Compressed air tubes 48 can be inserted in bores 50 and 52 in a compressed air-tight manner in order to supply additional air into the injector tube 24 and / or the vacuum space, which adjoins the injector nozzle 22 and in which the conveying air flow of this injector nozzle 22 generates a vacuum. This additional air can be supplied from the same or a different compressed air source via a further connecting piece 54 and a further compressed air hose 58 through the bore 50 in the upper connecting plate 8 to the further compressed air pipe 48.

Anstelle von Rohren 26, 38, 48 können Schläuche verwendet werden, und anstelle von Schläuchen 46, 58 können Rohre verwendet werden.Tubes may be used in place of tubes 26, 38, 48, and tubes may be used in place of tubes 46, 58.

Bei der dargestellten Ausführungsform befindet sich der Injektor, welcher im wesentlichen aus der Injektordüse 22 und dem Injektorrohr 24 besteht, am unteren und damit am stromaufwärtigen Ende des Pulverrohres 26. Gemäß anderen Ausführungsformen, die nicht in den Zeichnungen dargestellt sind, kann sich der Injektor am oberen und damit am stromabwärtigen Ende des Pulverrohres 26 befinden, ähnlich wie dies aus den DE-A 40 12 190 und 40 21 674 sowie EP-B-0 184 994 bekannt ist. Bei dieser abgewandelten Form hat das Pulverrohr 26 die Aufgabe eines Steigrohres oder Pulveransaugrohres.In the embodiment shown, the injector, which essentially consists of the injector nozzle 22 and the injector tube 24, is located at the lower and thus at the upstream end of the powder tube 26. According to other embodiments, which are not shown in the drawings, the injector can be located on the Upper and thus at the downstream end of the powder tube 26, similar to what is known from DE-A 40 12 190 and 40 21 674 and EP-B-0 184 994. In this modified form, the powder tube 26 has the function of a riser tube or powder suction tube.

Das Gehäuse 4 umschließt pulverdicht alle Teile der Pulverfördervorrichtungen 2, mit Ausnahme von deren Pulverabsaugeinlaß 32 am unteren Ende und mit Ausnahme von deren Anschlußelementen 28, 44 und 54 zum Anschluß einer externen Pulverleitung und externen Druckluftleitungen.The housing 4 encloses all parts of the powder conveying devices 2 in a powder-tight manner, with the exception of their powder suction inlet 32 at the lower end and with one exception of their connecting elements 28, 44 and 54 for connecting an external powder line and external compressed air lines.

Die Pulverfördervorrichtungen 2 können das Pulver zu verschiedenen Sprühvorrichtungen oder zu anderen Stellen fördern, zum Beispiel in einen weiteren Behälter oder parallel in verschiedene Behälter.The powder conveying devices 2 can convey the powder to different spraying devices or to other locations, for example into another container or in parallel into different containers.

Bei allen Ausführungsformen ergibt die Erfindung den Vorteil, daß zwei oder mehr, beispielsweise fünf oder zehn oder zwanzig, Pulverfördervorrichtungen 2 zusammen als eine Baueinheit in einen einzigen Pulverbehälter eingetaucht werden können, entweder von Hand oder automatisch, und daß die Pulverfördervorrichtungen 2 an den meisten von ihren Außenseiten nicht mit Pulver in Berührung kommen. Bei einem Pulverwechsel brauchen lediglich die Außenflächen des Gehäuses 4 gereinigt zu werden, jedoch nicht die Außenflächen der einzelnen Pulverfördervorrichtungen. Alle Teile der Pulverfördervorrichtungen 2 sind mit den Anschlußplatten 8 und 10 leicht lösbar verbunden, vorzugsweise nur durch eine Steckverbindung, und zum Zerlegen der gesamten Vorrichtung braucht lediglich eine der beiden Anschlußplatten 8 oder 10 von der Gehäusewand 6 getrennt zu werden, um die Pulverfördervorrichtungen zu demontieren oder, umgekehrt, zu montieren. Zum Auswechseln oder Reinigen einer Injektordüse 22 braucht lediglich der Ansaugkopf 20 von der unteren Anschlußplatte 10 abgezogen zu werden.In all embodiments, the invention has the advantage that two or more, e.g. five or ten or twenty, powder conveyors 2 can be immersed together as one unit in a single powder container, either manually or automatically, and that the powder conveyors 2 are attached to most of them do not come into contact with powder on the outside. When changing the powder, only the outer surfaces of the housing 4 need to be cleaned, but not the outer surfaces of the individual powder conveying devices. All parts of the powder conveying devices 2 are easily detachably connected to the connecting plates 8 and 10, preferably only by means of a plug connection, and to disassemble the entire device only one of the two connecting plates 8 or 10 needs to be separated from the housing wall 6 in order to disassemble the powder conveying devices or, conversely, to assemble. To replace or clean an injector nozzle 22, only the suction head 20 needs to be removed from the lower connection plate 10.

Claims (7)

Vorrichtung zur Pulverbeschichtung mit folgenden Merkmalen: zwei oder mehr Pulverfördervorrichtungen (2), die je mindestens einen Injektor (22, 24), einen Druckluftkanal (38) zur Zufuhr von Druckluft zum Injektor und eine Pulverleitung (40) zur Förderung des vom Injektor angesaugten Pulvers aufweisen, wobei die Pulverfördervorrichtungen in einen Pulverbehälter eintauchbar sind, um aus ihm Pulver abzusaugen,
dadurch gekennzeichnet, daß alle Pulverfördervorrichtungen (2), die zur Pulverförderung aus dem gleichen Behälter vorgesehen sind, in einem Gehäuse (4) untergebracht und befestigt sind, welches alle diese Pulverfördervorrichtungen (2) mindestens um ihre Teile, welche in den Pulverbehälter eintauchbar sind, pulverdicht umschließt, mit Ausnahme eines Pulverabsaugeinlasses (32) der Pulverfördervorrichtungen (2), in welchen die Pulverfördervorrichtungen Pulver aus dem Behälter einsaugen, und daß das Gehäuse (4) und alle in ihm befestigten Pulverfördervorrichtungen (2) zusammen eine Baueinheit bilden, welche mit allen Pulverfördervorrichtungen (2) zusammen und gleichzeitig in den gleichen Behälter eintauchbar ist.Device for powder coating with the following features: two or more powder conveying devices (2), each having at least one injector (22, 24), a compressed air channel (38) for supplying compressed air to the injector and a powder line (40) for conveying the injector have sucked powder, the powder conveying devices being immersed in a powder container in order to suck powder from it,
characterized in that all powder conveying devices (2) which are provided for powder conveying from the same container are accommodated and fastened in a housing (4) which contains all these powder conveying devices (2) at least around their parts which can be immersed in the powder container, encloses in a powder-tight manner, with the exception of a powder suction inlet (32) of the powder conveying devices (2), in which the powder conveying devices suck in powder from the container, and that the housing (4) and all powder conveying devices (2) fastened in it form a structural unit which together with all Powder conveyors (2) together and at the same time immersed in the same container. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Pulverfördervorrichtungen (2) eine stabartig längliche Form haben, an deren unterem Ende der Pulverabsaugeinlaß (32) gebildet ist, daß das Gehäuse (4) eine obere Anschlußplatte (8) am oberen Ende der Pulverabsaugvorrichtungen (2) und eine untere Anschlußplatte (10) am unteren Ende der Pulverabsaugvorrichtungen (2) sowie eine die beiden Platten (8, 10) miteinander verbindende Gehäusewand (6) aufweist, und daß sich durch die beiden Platten (8, 10) die Strömungswege (26, 38, 48, 34, 36, 40, 42, 50, 52) der Pulverfördervorrichtungen (2) hindurch erstrecken.Device according to claim 1,
characterized in that the powder conveying devices (2) have a rod-like elongated shape, at the lower end of which the powder suction inlet (32) is formed, in that the housing (4) has an upper connecting plate (8) at the upper end of the powder suction devices (2) and a lower one Connection plate (10) at the lower end of the powder suction devices (2) and one connecting the two plates (8, 10) Has housing wall (6), and that the flow paths (26, 38, 48, 34, 36, 40, 42, 50, 52) of the powder conveying devices (2) extend through the two plates (8, 10). Vorrichtung nach Anspruch 2,
dadurch gekennzeichnet, daß die Gehäusewand (6) an den beiden Platten (8, 10) lösbar befestigt ist.Device according to claim 2,
characterized in that the housing wall (6) is releasably attached to the two plates (8, 10). Vorrichtung nach Anspruch 2 oder 3,
dadurch gekennzeichnet, daß die Gehäusewand (6) ein Vierkantrohr ist, dessen Enden durch die beiden Platten (8, 10) verschlossen sind.Device according to claim 2 or 3,
characterized in that the housing wall (6) is a square tube, the ends of which are closed by the two plates (8, 10). Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß der Injektor (22, 24) am unteren Ende seiner Pulverfördervorrichtung (2) angeordnet ist.Device according to one of claims 1 to 4,
characterized in that the injector (22, 24) is arranged at the lower end of its powder conveying device (2). Vorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß der Injektor (22, 24) oder mindestens ein Teil (20) von jedem Injektor (22, 24) von der Gehäuseaußenseite her lösbar mit seiner Pulverfördervorrichtung (2) verbunden ist, derart, daß der Injektor (22, 24) ganz von seiner Pulverfördervorrichtung (2) abnehmbar ist oder geöffnet werden kann, je ohne daß das Gehäuse (6) geöffnet oder die betreffende Pulverfördervorrichtung (2) aus dem Gehäuse (6) herausgenommen zu werden braucht.Device according to claim 5,
characterized in that the injector (22, 24) or at least a part (20) of each injector (22, 24) is detachably connected to its powder conveying device (2) from the outside of the housing, such that the injector (22, 24) is completely removable from its powder conveying device (2) or can be opened, without the housing (6) being opened or the one in question Powder conveying device (2) needs to be removed from the housing (6). Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Pulverfördervorrichtungen (2) parallel nebeneinander angeordnet sind.Device according to one of the preceding claims,
characterized in that the powder conveying devices (2) are arranged parallel next to one another.
EP96112635A 1995-10-19 1996-08-05 Device for powder coating Withdrawn EP0769327A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19538926A DE19538926A1 (en) 1995-10-19 1995-10-19 Powder coating device
DE19538926 1995-10-19

Publications (2)

Publication Number Publication Date
EP0769327A2 true EP0769327A2 (en) 1997-04-23
EP0769327A3 EP0769327A3 (en) 1998-01-14

Family

ID=7775256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96112635A Withdrawn EP0769327A3 (en) 1995-10-19 1996-08-05 Device for powder coating

Country Status (5)

Country Link
US (1) US5765971A (en)
EP (1) EP0769327A3 (en)
JP (1) JPH09164362A (en)
DE (1) DE19538926A1 (en)
TR (1) TR199600821A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6194027B1 (en) 1997-11-03 2001-02-27 Itw Gema Ag Method and equipment for powder spray coating
US6217654B1 (en) 1997-11-03 2001-04-17 Itw Gema Ag Method and equipment for powder spray coating

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6852164B2 (en) 1998-05-22 2005-02-08 Nordson Corporation Powder supply system for coating installations with a plurality of application units
DE19823068A1 (en) * 1998-05-22 1999-11-25 Erich Kraemer Powder supply system for powder coating appliance
US6705545B1 (en) 1998-11-13 2004-03-16 Steelcase Development Corporation Quick color change powder paint system
DE19903578A1 (en) * 1999-01-29 2000-08-03 Erich Kraemer Central powder supply system
US6478242B1 (en) 1999-09-16 2002-11-12 Nordson Corporation Powder spray gun
US20030080220A1 (en) * 1999-09-16 2003-05-01 Mather Brian D. Powder spray gun with inline angle spray nozzle
WO2003031075A1 (en) * 1999-09-16 2003-04-17 Nordson Corporation Powder spray gun with inline angle spray nozzle
DE102010039473B4 (en) * 2010-08-18 2014-11-20 Gema Switzerland Gmbh Powder supply device for a powder coating system
GB2566452A (en) 2017-09-12 2019-03-20 Carlisle Fluid Tech Inc Colour change system for powder coating
WO2024044626A1 (en) * 2022-08-25 2024-02-29 Boston Scientific Scimed, Inc. Weighted manifold for an endoscope

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2102678A1 (en) * 1971-01-21 1972-08-24 Robert Bosch Gmbh, 7000 Stuttgart Facility with a fluidized bed
FR2215375A1 (en) * 1973-01-25 1974-08-23 Carrier
EP0059781A2 (en) * 1981-03-07 1982-09-15 GABLER GmbH & Co., KG. Arrangement for the pneumatic or hydraulic lifting and conveying of material to be conveyed
EP0184994B1 (en) * 1984-09-26 1988-05-18 Siegfried Frei Powder exhauster
EP0453750A2 (en) * 1990-04-24 1991-10-30 Metri Airfluid Ag Device for fluidising power contained in a container and evacuating fluidised powder directly towards a spray gun of an electrostatic powder coating device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005413B (en) * 1955-02-28 1957-03-28 Knapsack Ag Method and device for applying protective coatings made of fusible pulverulent substances to objects of any kind by spraying the powder with a flame spraying device
US3826540A (en) * 1973-03-21 1974-07-30 Elektro Ion Powder hopper for electrostatic powder spraying apparatus
CA998410A (en) * 1974-01-16 1976-10-12 Charles R. Vertue Particulate material conveying apparatus
EP0450295A3 (en) * 1990-04-04 1992-01-08 Wagner International Ag Fluidising and conveying device
DE4021674A1 (en) * 1990-07-07 1992-01-16 Gema Ransburg Ag Pneumatic powder conveyor with pipe arrangement - consists of suction and compressed air pipes with spacer pieces at top and bottom
DE9105321U1 (en) * 1991-04-30 1991-06-20 Gebrueder Thiemt Ohg, 4520 Melle, De
DE4415828A1 (en) * 1994-05-05 1995-06-29 Gema Volstatic Ag Tilting table for powder container

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2102678A1 (en) * 1971-01-21 1972-08-24 Robert Bosch Gmbh, 7000 Stuttgart Facility with a fluidized bed
FR2215375A1 (en) * 1973-01-25 1974-08-23 Carrier
EP0059781A2 (en) * 1981-03-07 1982-09-15 GABLER GmbH & Co., KG. Arrangement for the pneumatic or hydraulic lifting and conveying of material to be conveyed
EP0184994B1 (en) * 1984-09-26 1988-05-18 Siegfried Frei Powder exhauster
EP0453750A2 (en) * 1990-04-24 1991-10-30 Metri Airfluid Ag Device for fluidising power contained in a container and evacuating fluidised powder directly towards a spray gun of an electrostatic powder coating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6194027B1 (en) 1997-11-03 2001-02-27 Itw Gema Ag Method and equipment for powder spray coating
US6217654B1 (en) 1997-11-03 2001-04-17 Itw Gema Ag Method and equipment for powder spray coating

Also Published As

Publication number Publication date
DE19538926A1 (en) 1997-04-24
US5765971A (en) 1998-06-16
TR199600821A2 (en) 1997-05-21
EP0769327A3 (en) 1998-01-14
JPH09164362A (en) 1997-06-24

Similar Documents

Publication Publication Date Title
EP0577681B1 (en) Slit nozzle for delivering liquids
EP0108929B2 (en) Apparatus for dispensing a liquid
EP0599087B1 (en) Device for lubricating and cleaning of chains and rails
DE19728155A1 (en) Cleaning and preparation method for paint spray pipe
EP0540774A1 (en) Fluid atomizing device
DE102004033604A1 (en) Powder color changer
EP0769327A2 (en) Device for powder coating
EP0290869B1 (en) Device for interchangeable connections
DE3927880C2 (en) Process and plant for coating objects with frequently changing color material
EP0913203B1 (en) Method and apparatus for powder coating with purging air supply
EP0760259B1 (en) Injector device for powder spray coating
EP0718047A2 (en) Injection device for conveying coating powder
EP0888825A2 (en) Method and device for painting
EP0689875A2 (en) Pneumatic apparatus for conveying powder, particularly coating powder
DE3209726A1 (en) DEVICE FOR DEVELOPING OFFSET PRINTING PLATES
EP0718043A1 (en) Powder coating installation
DE4114097A1 (en) Jet pump for spraying powder - has entrainment nozzles which are arranged to reduce wear and to be easily cleaned
DE69916466T2 (en) LUBRICANT DISPENSER
DE4223006A1 (en) Device for treating workpieces with a pressure fluid
DE4417727A1 (en) Hose brush for pipelines in powder spray-coating plants
DE19914040B4 (en) Spray gun robot adapter
DE4027421A1 (en) Manual liq. spray appliance - incorporates pressurised material tank with tube inside
EP0541745A1 (en) Spray coating device.
DE4312994C2 (en) Device for spraying suspensions, in particular mortars
DE19817377A1 (en) Cleaning and preparation method for paint spray pipe

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960805

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980715