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EP1348486A2 - Injector for a powder coating installation - Google Patents

Injector for a powder coating installation Download PDF

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Publication number
EP1348486A2
EP1348486A2 EP03005064A EP03005064A EP1348486A2 EP 1348486 A2 EP1348486 A2 EP 1348486A2 EP 03005064 A EP03005064 A EP 03005064A EP 03005064 A EP03005064 A EP 03005064A EP 1348486 A2 EP1348486 A2 EP 1348486A2
Authority
EP
European Patent Office
Prior art keywords
injector
electrically conductive
injector according
injector housing
electrically
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03005064A
Other languages
German (de)
French (fr)
Other versions
EP1348486A3 (en
EP1348486B1 (en
Inventor
Kurt Seitz
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J Wagner AG
Original Assignee
J Wagner AG
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Filing date
Publication date
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Publication of EP1348486A2 publication Critical patent/EP1348486A2/en
Publication of EP1348486A3 publication Critical patent/EP1348486A3/en
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Publication of EP1348486B1 publication Critical patent/EP1348486B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
    • B05B7/1404—Arrangements for supplying particulate material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • 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 an injector for a powder coating system with an injector housing made of electrically non-conductive material, especially plastic.
  • Such injectors contain a transport gas, usually compressed air, and a color powder mixed together, the latter by means of the transport gas stream to a coating device, like a powder spray gun to spray a workpiece.
  • a transport gas usually compressed air
  • a color powder mixed together the latter by means of the transport gas stream to a coating device, like a powder spray gun to spray a workpiece.
  • the inner walls of the powder transport channel are preferably made of a non-conductive Plastic, such as PTFE (polytetrafluoroethylene) manufactured to prevent caking of the to prevent transported powder on the inner wall.
  • PTFE polytetrafluoroethylene
  • Powder friction charges Due to the friction of the powder on the walls of the powder transport channel Powder friction charges.
  • the charge current of these charges is a measure of the powder quality and powder density.
  • the invention has for its object the powder quality and powder density of the in the injector monitor pumped powder during operation.
  • this is due to the practically complete shielding the injector of electromagnetic interference achieved in that practical the entire outer surfaces of the injector and the attachments, such as compressed air connections, Earth connections and the like made of electrically conductive material, such as metal or consist of electrically conductive plastic or covered with such material and grounded are, and that the also electrically conductive inner surfaces by interruptions are electrically isolated from the outer surface.
  • electrically conductive material such as metal or consist of electrically conductive plastic or covered with such material and grounded are, and that the also electrically conductive inner surfaces by interruptions are electrically isolated from the outer surface.
  • the injector shown has an injector housing 2 made of electrically non-conductive plastic, which is covered by a metal cover 3 and within a propellant nozzle 4 and one Catch nozzle 6 takes up in a coaxial arrangement one behind the other.
  • the capture nozzle 6 is in one piece with a hose nozzle 8 made of an electrically non-conductive plastic, preferably made of PTFE (Polytetrafluoroethylene) manufactured to prevent caking of powder on the inner wall 7 of the Avoid hose nozzle.
  • PTFE Polytetrafluoroethylene
  • the injector housing has a powder connector 10, which has a metal Powder suction pipe 28 is connected to a powder reservoir, not shown. Furthermore, a compressed air connection 12 for propellant nozzle air and a compressed air connection 14 for Air catch air provided.
  • the connections 12 and 14 are made of metal.
  • a sleeve 16 is mounted on the hose nozzle 8. This sleeve 16 carries the usual ribs 18 for fitting and holding the injector-side end of a delivery hose 20 which is made electrically conductive be, e.g. can consist of an electrically conductive material.
  • the sleeve 16 goes at its injector end via an annular flange 17 into a union nut 22 over that to an external thread 24 of a connecting piece 26 for the Hose connection is screwed on and the ring flange to a radial shoulder 9 of the Catch nozzle 6 keeps pressed.
  • Sleeve 16 with union nut 22 are of an electrically conductive Material layer covered or made of metal.
  • the metal cover 3 of the injector housing 2 is attached to the injector housing 2 by means of screws 13 screwed and has an electrical connection 11 for a measuring device M for detecting Frictional charge flows, which occur in the injector due to friction of the powder particles on the inner walls of the transport channel, such as the inner wall 7 of the catch nozzle 6, arise. Further is an earth connection 60 on the cover 3 for earthing the outer surface of the injector housing intended. Alternatively, such an earth connection is provided at 60 'on the injector housing 2.
  • the outer surfaces A and the inner surfaces I of the injector housing 2 are as shown Dashed lines are indicated, each provided with a coating of electrically conductive material, e.g. with metal layers.
  • the coating of the outer surface is that of the inner surface separated by electrically insulating interruptions U. These interruptions U are in places on the injector housing that require processing, in particular easily accessible through rotating tools, observation and cleaning or maintenance are.
  • Figure 1 are two alternatives for tapping the electrical friction charges from the represented electrically conductive coating of the inner surface I of the injector housing 2 and described below in sequence.
  • an electrical lead wire 40 is electrically conductive coated inner wall 42 of the powder connector 10 led out of the injector housing 2.
  • the electrically conductive layer of the inner wall 42 is in an electrically conductive connection with the dashed line, also with an electrically conductive layer provided receiving bore 43 for the catch nozzle 6, so that the generated inside the catch nozzle In this way, the frictional charge flows over the wire 40 to the measuring device M. can.
  • friction charges are applied via the metallic drive nozzle 4 tapped into an electrically conductive receptacle in the form of a threaded hole 50 is screwed inside the injector housing 2.
  • a metallization layer 54 an insulating plate 56 on the inside of the cover 3 and one of these Metallized layer 54 made for connection 11 guided contact wire 58.
  • contact wire can then handle the friction charge from the inside of the injector housing via connection 11 to a measuring device M for very small currents in the ⁇ ampere range can be brought out.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The injector has a non-conductive casing (2) with electrically conductive interior (I) and exterior (A) surfaces insulated with respect to each other by interruptions. Friction charges generated with a cone (6) passes from the interior surface through a lead wire (40) to an instrument (M) for measuring the charge current. A ground connection (60) establishes contact between the exterior surface and ground potential.

Description

Die Erfindung betrifft einen Injektor für eine Pulverbeschichtungsanlage mit einem Injektorgehäuse aus elektrisch nicht leitendem Material, insbesondere aus Kunststoff.The invention relates to an injector for a powder coating system with an injector housing made of electrically non-conductive material, especially plastic.

In solchen Injektoren werden ein Transportgas, normalerweise Druckluft, und ein Farbpulver miteinander vermischt, um letzteres mittels des Transportgasstromes zu einem Beschichtungsgerät, wie einer Pulversprühpistole, zum Besprühen eines Werkstückes zu fördern.Such injectors contain a transport gas, usually compressed air, and a color powder mixed together, the latter by means of the transport gas stream to a coating device, like a powder spray gun to spray a workpiece.

Die Innenwandungen des Pulvertransportkanals werden dabei bevorzugt aus einem nicht leitendem Kunststoff, wie PTFE (Polytetrafluorethylen) gefertigt, um einem Anbacken des transportierten Pulvers an der Innenwandung vorzubeugen.The inner walls of the powder transport channel are preferably made of a non-conductive Plastic, such as PTFE (polytetrafluoroethylene) manufactured to prevent caking of the to prevent transported powder on the inner wall.

Aufgrund der Reibung des Pulvers an den Wandungen des Pulvertransportkanales entstehen Reibungsladungen des Pulvers. Der Ladungsstrom dieser Ladungen ist ein Maß für die Pulverqualität und Pulverdichte.Due to the friction of the powder on the walls of the powder transport channel Powder friction charges. The charge current of these charges is a measure of the powder quality and powder density.

Der Erfindung liegt die Aufgabe zugrunde, die Pulverqualität und Pulverdichte des im Injektor geförderten Pulvers im Betrieb zu überwachen.The invention has for its object the powder quality and powder density of the in the injector monitor pumped powder during operation.

Zur Lösung dieser Aufgabe dient Anspruch 1.To solve this problem, claim 1.

Bei dem Injektor gemäß der Erfindung ist es möglich, im Betrieb fortlaufend oder sporadisch die durch Reibung entstehenden Ladungen im Injektor in Form von elektrischen Strömen zu erfassen und damit die Pulverqualität und -dichte zu ermitteln. Diese elektrischen Ströme sind nach den Feststellungen der Erfinder sehr klein (in der Größenordnung von µA), so daß Störungen durch elektromagnetische Wellen in der Umgebung des Injektors von der Erfassung der Reibungsladungsströme ferngehalten werden müssen, um Verfälschungen der Meßergebnisse zu vermeiden. Dies ist erfindungsgemäß durch die praktisch vollständige Abschirmung des Injektors von elektromagnetischen Störeinflüssen dadurch erreicht, daß praktisch die gesamten Außenoberflächen des Injektors und der Anbauteile, wie Druckluftanschlüsse, Erdanschlüsse und dergleichen aus elektrisch leitendem Material, wie Metall oder elektrisch leitendem Kunststoff bestehen oder mit solchem Material überzogen und geerdet sind, und daß die ebenfalls elektrisch leitend ausgebildete Innenoberflächen durch Unterbrechungen von der Außenoberfläche elektrisch isoliert sind. Somit können die sehr kleinen, im Betrieb entstehenden Reibungsladungsströme ungestört von der Innenoberfläche abgegriffen und zu einem Meßgerät für diese Ströme aus dem Injektor herausgeführt werden, so daß eine genaue Messung gewährleistet ist.With the injector according to the invention it is possible to operate continuously or sporadically the charges generated by friction in the injector in the form of electrical currents record and thus determine the powder quality and density. These electrical currents are, according to the inventors' findings, very small (in the order of µA), so that Interference from electromagnetic waves in the vicinity of the injector from detection the frictional charge currents must be kept away in order to falsify the measurement results to avoid. According to the invention, this is due to the practically complete shielding the injector of electromagnetic interference achieved in that practical the entire outer surfaces of the injector and the attachments, such as compressed air connections, Earth connections and the like made of electrically conductive material, such as metal or consist of electrically conductive plastic or covered with such material and grounded are, and that the also electrically conductive inner surfaces by interruptions are electrically isolated from the outer surface. Thus, the very small, in Operating friction currents are tapped undisturbed from the inner surface and lead to a measuring device for these currents from the injector, so that a accurate measurement is guaranteed.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.

Die Erfindung ist im Folgenden anhand schematischer Zeichnungen an einem Ausführungsbeispiel mit weiteren Einzelheiten näher erläutert. Es zeigen:

Figur 1
einen Längsschnitt durch einen Injektor gemäß der Erfindung;
Figur 2
die linke Seitenansicht von Figur 1; und
Figur 3
eine perspektivische Darstellung eines Injektors gemäß den Figuren 1 und 2.
The invention is explained in more detail below with reference to schematic drawings of an embodiment with further details. Show it:
Figure 1
a longitudinal section through an injector according to the invention;
Figure 2
the left side view of Figure 1; and
Figure 3
a perspective view of an injector according to Figures 1 and 2.

Der gezeigte Injektor hat ein Injektorgehäuse 2 aus elektrisch nicht leitendem Kunststoff, das von einem metallenen Deckel 3 abgedeckt ist und innerhalb eine Treibdüse 4 und eine Fangdüse 6 in koaxialer Anordnung hintereinander aufnimmt. Die Fangdüse 6 ist einteilig mit einer Schlauchtülle 8 aus einem elektrisch nicht leitenden Kunststoff, vorzugsweise aus PTFE (Polytetrafluorethylen) gefertigt, um ein Anbacken von Pulver an der Innenwand 7 der Schlauchtülle zu vermeiden. Zudem wir mit PTFE ein hoher Reibungsladungsstrom erzeugt.The injector shown has an injector housing 2 made of electrically non-conductive plastic, which is covered by a metal cover 3 and within a propellant nozzle 4 and one Catch nozzle 6 takes up in a coaxial arrangement one behind the other. The capture nozzle 6 is in one piece with a hose nozzle 8 made of an electrically non-conductive plastic, preferably made of PTFE (Polytetrafluoroethylene) manufactured to prevent caking of powder on the inner wall 7 of the Avoid hose nozzle. In addition, a high friction charge current is generated with PTFE.

Wie üblich hat das Injektorgehäuse einen Pulveranschlußstutzen 10, der über ein metallenes Pulveransaugrohr 28 mit einem nicht gezeigten Pulvervorratsbehälter in Verbindung steht. Ferner sind ein Druckluftanschluß 12 für Treibdüsenluft und ein Druckluftanschluß 14 für Fangdüsenluft vorgesehen. Die Anschlüsse 12 und 14 sind aus Metall. Auf die Schlauchtülle 8 ist eine Hülse 16 aufgezogen. Diese Hülse 16 trägt die üblichen Rippen 18 zum Überstülpen und Halten des injektorseitigen Endes eines Förderschlauches 20, der elektrisch leitfähig ausgebildet sein, z.B. aus einem elektrisch leitfähigen Material bestehen kann. As usual, the injector housing has a powder connector 10, which has a metal Powder suction pipe 28 is connected to a powder reservoir, not shown. Furthermore, a compressed air connection 12 for propellant nozzle air and a compressed air connection 14 for Air catch air provided. The connections 12 and 14 are made of metal. On the hose nozzle 8, a sleeve 16 is mounted. This sleeve 16 carries the usual ribs 18 for fitting and holding the injector-side end of a delivery hose 20 which is made electrically conductive be, e.g. can consist of an electrically conductive material.

Die Hülse 16 geht an ihrem injektorseitigen Ende über einen Ringflansch 17 in eine Überwurfmutter 22 über, die auf ein Außengewinde 24 eines Anschlußstutzens 26 für den Schlauchanschluß aufgeschraubt ist und den Ringflansch an eine radiale Schulter 9 der Fangdüse 6 angedrückt hält. Hülse 16 mit Überwurfmutter 22 sind von einer elektrisch leitfähigen Materialschicht überzogen oder bestehen aus Metall.The sleeve 16 goes at its injector end via an annular flange 17 into a union nut 22 over that to an external thread 24 of a connecting piece 26 for the Hose connection is screwed on and the ring flange to a radial shoulder 9 of the Catch nozzle 6 keeps pressed. Sleeve 16 with union nut 22 are of an electrically conductive Material layer covered or made of metal.

Der metallene Deckel 3 des Injektorgehäuses 2 ist mittels Schrauben 13 am Injektorgehäuse 2 angeschraubt und hat einen elektrischen Anschluß 11 für ein Meßgerät M zum Erfassen von Reibungsladungsströmen, welche im Injektor durch Reibung der Pulverpartikel an den Innenwandungen des Transportkanals, wie der Innenwand 7 der Fangdüse 6, entstehen. Ferner ist am Deckel 3 ein Erdanschluß 60 zur Erdung der Außenoberfläche des Injektorgehäuses vorgesehen. Alternativ ist ein solcher Erdanschluß bei 60' am Injektorgehäuse 2 vorgesehen.The metal cover 3 of the injector housing 2 is attached to the injector housing 2 by means of screws 13 screwed and has an electrical connection 11 for a measuring device M for detecting Frictional charge flows, which occur in the injector due to friction of the powder particles on the inner walls of the transport channel, such as the inner wall 7 of the catch nozzle 6, arise. Further is an earth connection 60 on the cover 3 for earthing the outer surface of the injector housing intended. Alternatively, such an earth connection is provided at 60 'on the injector housing 2.

Die Außenoberflächen A und die Innenoberflächen I des Injektorgehäuses 2 sind, wie durch Strichelung angedeutet ist, je mit einem Überzug aus elektrisch leitendem Material versehen, z.B. mit Metallschichten. Die Beschichtung der Außenoberfläche ist von derjenigen der Innenoberfläche durch elektrisch isolierende Unterbrechungen U getrennt. Diese Unterbrechungen U befinden sich an Stellen des Injektorgehäuses, die einer Bearbeitung, insbesondere durch drehende Werkzeuge, einer Beobachtung und einer Reinigung oder Wartung gut zugänglich sind.The outer surfaces A and the inner surfaces I of the injector housing 2 are as shown Dashed lines are indicated, each provided with a coating of electrically conductive material, e.g. with metal layers. The coating of the outer surface is that of the inner surface separated by electrically insulating interruptions U. These interruptions U are in places on the injector housing that require processing, in particular easily accessible through rotating tools, observation and cleaning or maintenance are.

In Figur 1 sind zwei Alternativen für den Abgriff der elektrischen Reibungsladungen von der elektrisch leitenden Beschichtung der Innenoberfläche I des Injektorgehäuses 2 dargstellt und im Folgenden nacheinander beschrieben.In Figure 1 are two alternatives for tapping the electrical friction charges from the represented electrically conductive coating of the inner surface I of the injector housing 2 and described below in sequence.

Gemäß einer ersten Alternative ist ein elektrischer Leitungsdraht 40 von der elektrisch leitend beschichteten Innenwand 42 des Pulveranschlußstutzens 10 aus dem Injektorgehäuse 2 herausgeführt. Die elektrisch leitende Schicht der Innenwand 42 steht in elektrisch leitender Verbindung mit der gestrichelt angedeuteten, ebenfalls mit einer elektrisch leitfähigen Schicht versehenen Aufnahmebohrung 43 für die Fangdüse 6, so daß die innerhalb der Fangdüse erzeugte Reibungsladung auf diesem Wege über den Draht 40 zu dem Meßgerät M abfließen kann.According to a first alternative, an electrical lead wire 40 is electrically conductive coated inner wall 42 of the powder connector 10 led out of the injector housing 2. The electrically conductive layer of the inner wall 42 is in an electrically conductive connection with the dashed line, also with an electrically conductive layer provided receiving bore 43 for the catch nozzle 6, so that the generated inside the catch nozzle In this way, the frictional charge flows over the wire 40 to the measuring device M. can.

Gemäß einer zweiten Alternative werden Reibungsladungen über die metallische Treibdüse 4 abgegriffen, die in eine elektrisch leitend ausgebildete Aufnahme in Gestalt einer Gewindebohrung 50 im Inneren des Injektorgehäuses 2 eingeschraubt ist. Zwischen dem elektrischen Anschluß 11 und der Treibdüse 4 ist ein elektrischer Pfad über eine Feder 52, eine Metallisierschicht 54 einer Isolierplatte 56 an der Innenseite des Deckels 3 und über einen von dieser Metallisierschicht 54 zum Anschluß 11 geführten Kontaktdraht 58 hergestellt. Über den elektrischen Kontaktdraht kann dann ebenso wie bei der ersten Alternative die Reibungsladung aus dem Inneren des Injektorgehäuses über den Anschluß 11 zu dem einem Meßgerät M für sehr kleine Ströme im µ-Ampère-Bereich herausgeführt werden.According to a second alternative, friction charges are applied via the metallic drive nozzle 4 tapped into an electrically conductive receptacle in the form of a threaded hole 50 is screwed inside the injector housing 2. Between the electrical Terminal 11 and the driving nozzle 4 is an electrical path via a spring 52, a metallization layer 54 an insulating plate 56 on the inside of the cover 3 and one of these Metallized layer 54 made for connection 11 guided contact wire 58. About the electrical Like the first alternative, contact wire can then handle the friction charge from the inside of the injector housing via connection 11 to a measuring device M for very small currents in the µ ampere range can be brought out.

Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung. Those disclosed in the foregoing description, claims and drawings Features can be used individually as well as in any combination for the realization the invention.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

Injektorgehäuseinjector
22
Deckelcover
33
Treibdüsepropelling nozzle
44
Fangdüsecollecting nozzle
66
Innenwand der FangdüseInner wall of the catch nozzle
77
Schlauchtüllehose
88th
Schultershoulder
99
PulveranschlußstutzenPowder connecting branch
1010
el. Anschlußel. connection
1111
Anschluß für TreibdüsenluftConnection for propellant air
1212
Deckelschraubecover screw
1313
Anschluß für FangdüsenluftConnection for trap nozzle air
1414
Hülseshell
1616
Ringflanschannular flange
1717
Rippenribs
1818
ÜberwurfmutterNut
2222
Außengewindeexternal thread
2424
Anschlußstutzenconnecting branch
2626
Pulveransaugrohr metallischPowder suction pipe metallic
2828
O-RingO-ring
3030
Leitungsdrahtlead wire
4040
Innenwand des Pulver Anschlußstutzens 10Inner wall of the powder Connection piece 10
4242
Aufnahmebohrung/Fang düseReceiving bore / Catch jet
4343
Aufnahmebohrung/Treib düseLocation hole / drive jet
5050
Federfeather
5252
Metallschichtmetal layer
5454
Isolierplatteinsulation
5656
Kontaktdrahtcontact wire
5858
ErdanschlußEarth connection
60, 60'60, 60 '
Außenoberflächeouter surface
AA
Innenoberflächeinner surface
II
Unterbrechungeninterruptions
UU
Meßgerätgauge
MM

Claims (13)

Injektor für eine Pulverbeschichtungsanlage mit einem Injektorgehäuse (2) aus elektrisch nicht leitfähigem Material, insbesondere Kunststoff, wobei die Innenoberfläche (I) und die Außenoberfläche (A) des Injektorgehäuses (2) elektrisch leitfähig ausgebildet sind; die Innenoberfläche (I) und die Außenoberfläche (A) durch Unterbrechungen (U) elektrisch voneinander isoliert sind; ein Abgriff der Ladungen von der elektrisch leitfähigen Innenoberfläche (I) aus dem Injektorgehäuse (2) zu einem Messgerät (M) für den Ladungsstrom herausgeführt ist; ein Erdanschluß (60; 60') zur Kontaktierung der elektrisch leitfähigen Außenoberfläche des Injektorgehäuses (2) mit dem Erdpotential vorgesehen ist. Injector for a powder coating system with an injector housing (2) made of electrically non-conductive material, in particular plastic, wherein the inner surface (I) and the outer surface (A) of the injector housing (2) are designed to be electrically conductive; the inner surface (I) and the outer surface (A) are electrically insulated from one another by interruptions (U); tapping off the charges from the electrically conductive inner surface (I) out of the injector housing (2) to a measuring device (M) for the charge current; an earth connection (60; 60 ') is provided for contacting the electrically conductive outer surface of the injector housing (2) with the earth potential. Injektor nach Anspruch 1, dadurch gekennzeichnet,daß die Innenoberfläche (I) und die Außenoberfläche (A) mit gesonderten, elektrisch voneinander isolierten Beschichtungen aus elektrisch leitfähigem Material überzogen sind.Injector according to claim 1, characterized in that the inner surface (I) and the outer surface (A) are covered with separate, electrically insulated coatings made of electrically conductive material. Injektor nach Anspruch 2, dadurch gekennzeichnet, daß die Beschichtungen aus Metall bestehen.Injector according to claim 2, characterized in that the coatings consist of metal. Injektor nach Anspruch 2 oder 3, dadurch gekennzeichnet,daß die Beschichtungen chemisch oder galvanisch auf die Innenoberflächen und die Außenoberflächen aufgebracht sind.Injector according to claim 2 or 3, characterized in that the coatings are applied chemically or galvanically to the inner surfaces and the outer surfaces. Injektor nach einem der Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Beschichtungen durch Tauchen in ein Metallbad erzeugt sind. Injector according to one of claims 1 to 3, characterized in that the coatings are produced by immersion in a metal bath. Injektor nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Abgriff über eine Aufnahme (43) für eine Fangdüse (6) aus dem Injektorgehäuse (2) über einen elektrischen Anschluß (11) herausgeführt ist, wobei die Aufnahme (43) eine elektrisch leitfähige Oberfläche hat, welche in leitendem Kontakt mit der Innenoberfläche (I) steht.Injector according to one of claims 1 to 5, characterized in that the tap is led out of the injector housing (2) via an electrical connection (11) via a receptacle (43) for a catch nozzle (6), the receptacle (43) being a has an electrically conductive surface which is in conductive contact with the inner surface (I). Injektor nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Abgriff über eine Treibdüse (4) aus elektrisch leitfähigem Material über einen elektrischen Anschluß (11) aus dem Injektorgehäuse herausgeführt ist, wobei die Treibdüse in einer elektrisch leitfähigen Aufnahme (50) sitzt, welche in leitendem Kontakt mit der Innenoberfläche steht.Injector according to one of claims 1 to 5, characterized in that the tap is led out of the injector housing via a drive nozzle (4) made of electrically conductive material, the drive nozzle being seated in an electrically conductive receptacle (50) , which is in conductive contact with the inner surface. Injektor nach Anspruch 7, dadurch gekennzeichnet, daß ein elektrischer Leitungspfad zwischen der Treibdüse (4) und dem elektrischen Anschluß (11) die Aufnahme (50), eine Feder (52), eine elektrisch leitende Beschichtung (54) einer mit einem Deckel (3) des Injektorgehäuses (2) verbundenen Isolierplatte (56) und einen Kontaktdraht (58) zwischen der Beschichtung (54) der Isolierplatte (56) und dem elektrischen Anschluß (11) umfaßt.Injector according to claim 7, characterized in that an electrical conduction path between the driving nozzle (4) and the electrical connection (11) contains the receptacle (50), a spring (52), an electrically conductive coating (54) with a cover (3 ) of the injector housing (2) connected insulating plate (56) and a contact wire (58) between the coating (54) of the insulating plate (56) and the electrical connection (11). Injektor nach einem der Ansprüche 1 bis 5 gekennzeichnet durch einen elektrischen Leitungsdraht (40), der aus dem Injektorgehäuse (2) herausgeführt ist, um den Abgriff der Ladungen von der elektrisch leitfähigen Innenoberfläche (1) aus dem Injektorgehäuse (2) zu dem Messgerät zu führen.Injector according to one of Claims 1 to 5, characterized by an electrical lead wire (40) which is led out of the injector housing (2) in order to tap the charges from the electrically conductive inner surface (1) from the injector housing (2) to the measuring device to lead. Injektor nach Anspruch 9, gekennzeichnet durch einen Pulveranschlußstutzen (10) der eine Innenwand (42) aufweist, die wenigstens teilweise elektrisch leitend ausgebildet ist, und eine Aufnahme (43) für eine Fangdüse (6), wobei die Aufnahme (43) eine elektrisch leitfähige Oberfläche hat und mit der elektrisch leitenden Innenwand (42) des Pulveranschlußstutzens (10) in elektrisch leitender Verbindung ist, wobei der Leitungsdraht (40) mit der Innenwand (42) des Pulveranschlußstutzens (10) elektrisch verbunden ist.Injector according to claim 9, characterized by a powder connecting piece (10) which has an inner wall (42) which is at least partially electrically conductive, and a receptacle (43) for a catch nozzle (6), the receptacle (43) being an electrically conductive one Has surface and is in electrically conductive connection with the electrically conductive inner wall (42) of the powder connection piece (10), the lead wire (40) being electrically connected to the inner wall (42) of the powder connection piece (10). Injektor nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß die elektrisch isolierenden Unterbrechungen (U) zwischen der Innenoberfläche (I) und der Außenoberfläche (A) an Stellen innerhalb des Injektorgehäuses (2) vorgesehen sind, die gut zugänglich für Bearbeitung, Beobachtung und Wartung sind.Injector according to one of claims 1 to 10, characterized in that the electrically insulating interruptions (U) between the inner surface (I) and the outer surface (A) are provided at locations within the injector housing (2) which are easily accessible for processing, observation and maintenance are. Injektor nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß sämtliche, an der Außenoberfläche angeordneten Bauelemente (11-14, 16, 60) des Injektors elektrisch leitfähig ausgebildet und mit der Außenoberfläche verbunden sind.Injector according to one of claims 1 to 10, characterized in that all the components (11-14, 16, 60) of the injector arranged on the outer surface are of electrically conductive design and are connected to the outer surface. Injektor nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die gesamte Außenoberfläche (A) des Injektorgehäuses (2) mit Ausnahme der Unterbrechungen (U) elektrisch leitfähig ausgebildet sind, um eine bestmögliche elektromagnetische Abschirmung des Injektors zu erzielen.Injector according to one of Claims 1 to 12, characterized in that the entire outer surface (A) of the injector housing (2), with the exception of the interruptions (U), is designed to be electrically conductive in order to achieve the best possible electromagnetic shielding of the injector.
EP03005064A 2002-03-25 2003-03-06 Injector for a powder coating installation Expired - Lifetime EP1348486B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10213275 2002-03-25
DE10213275A DE10213275C1 (en) 2002-03-25 2002-03-25 Injector for a powder coating system

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EP1348486A2 true EP1348486A2 (en) 2003-10-01
EP1348486A3 EP1348486A3 (en) 2005-05-04
EP1348486B1 EP1348486B1 (en) 2007-09-05

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US (1) US6857826B2 (en)
EP (1) EP1348486B1 (en)
DE (1) DE10213275C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170374A1 (en) * 2013-04-17 2014-10-23 Sames Technologies Venturi pump and facility for applying paint coatings

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202004019438U1 (en) * 2004-12-16 2005-02-10 J. Wagner Ag Powder conveying device and catching nozzle for the powder conveying device
US7708504B2 (en) * 2005-08-29 2010-05-04 Savannah River Nuclear Solutions, Llc Pneumatic conveyance apparatus and process
US20070074656A1 (en) * 2005-10-04 2007-04-05 Zhibo Zhao Non-clogging powder injector for a kinetic spray nozzle system
DE102010030761B4 (en) * 2010-06-30 2014-09-11 Gema Switzerland Gmbh Jet catch nozzle for a Pulverförderinjektor and Pulverförderinjektor
US8882400B2 (en) * 2010-10-29 2014-11-11 General Electric Company Solids feeder discharge port
CN102407200B (en) * 2011-07-18 2013-06-12 杭州浙大精益机电技术工程有限公司 Device for realizing automatic liquid spray of aerosol can based on electromagnetic driving
CN106994400A (en) * 2016-01-23 2017-08-01 宁波市鄞州吉田电器有限公司 A kind of electrostatic powder coating machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035360A (en) * 1990-07-02 1991-07-30 The University Of Toronto Innovations Foundation Electrically actuated gaseous fuel timing and metering device
DE4201665C2 (en) * 1992-01-22 1993-10-28 Wagner International Ag Altsta Powder injector
DE4443859A1 (en) * 1994-12-09 1996-06-13 Friedrich Lothar Measuring amount of lacquer powder flowing in electrostatic powder coating
FR2750897B1 (en) * 1996-07-10 1998-09-18 Sames Sa TRIBOELECTRIC PROJECTOR, COATING PRODUCT PROJECTION INSTALLATION AND METHOD FOR CONTROLLING SUCH A PROJECTOR
DE19738097C2 (en) * 1997-09-01 2000-01-27 Wagner International Ag Altsta Method for operating an electrostatic powder coating system and electrostatic powder coating system
CO5070568A1 (en) * 1998-05-22 2001-08-28 Eurand Internatrional Spa LAYER AND APPLIANCE APPLICATION PROCESS FOR EFFECT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170374A1 (en) * 2013-04-17 2014-10-23 Sames Technologies Venturi pump and facility for applying paint coatings
FR3004767A1 (en) * 2013-04-17 2014-10-24 Sames Technologies VENTURI EFFECT PUMP AND PAINT COATING APPLICATION INSTALLATION
US9636695B2 (en) 2013-04-17 2017-05-02 Sames Technologies Venturi pump and facility for applying paint coatings

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EP1348486A3 (en) 2005-05-04
EP1348486B1 (en) 2007-09-05
DE10213275C1 (en) 2003-12-24
US6857826B2 (en) 2005-02-22
US20030180101A1 (en) 2003-09-25

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