DE1577739B2 - Electrostatic spray device - Google Patents
Electrostatic spray deviceInfo
- Publication number
- DE1577739B2 DE1577739B2 DE1577739A DE1577739A DE1577739B2 DE 1577739 B2 DE1577739 B2 DE 1577739B2 DE 1577739 A DE1577739 A DE 1577739A DE 1577739 A DE1577739 A DE 1577739A DE 1577739 B2 DE1577739 B2 DE 1577739B2
- Authority
- DE
- Germany
- Prior art keywords
- electrode
- nozzle
- spray device
- gas
- high voltage
- 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- Withdrawn
Links
Classifications
-
- 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
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
-
- 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
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
- B05B7/067—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet the liquid outlet being annular
Description
Die Erfindung betrifft eine elektrostatische Sprühvorrichtung mit einer der Sprühdüse zugeordneten, unter Hochspannung gehaltenen Elektrode, welche gegenüber der Sprühvorrichtung isoliert angeordnet ist. Eine derartige elektrostatische Sprühvorrichtung ist bekannt (deutsche Patentschrift 9 62 590).The invention relates to an electrostatic spray device with one of the spray nozzle assigned, below Electrode held at high voltage, which is arranged insulated from the spray device. Such an electrostatic spray device is known (German patent specification 9 62 590).
Bei der bekannten Sprühvorrichtung wird die Hochspannung der Elektrode von einer Spannungsquelle über einen Widerstand an die Elektrode gelegt. Die Spannungsquelle muß daher eine hohe Spannung zur Aufladung der Elektrode auf Hochspannung liefern.In the known spray device, the high voltage of the electrode is supplied by a voltage source applied to the electrode via a resistor. The voltage source must therefore have a high voltage Provide high voltage charging of the electrode.
Aufgabe der Erfindung ist es, eine elektrostatische Sprühvorrichtung zu zeigen, bei der die unter Hochspannung gehaltene, der Sprühdüse zugeordnete Elektrode in einfacher Weise mittels einer ursprünglich relativ niedrigen Spannung auf die Hochspannung aufgeladen werden kann.The object of the invention is to show an electrostatic spray device in which the under high voltage held, the spray nozzle associated electrode in a simple manner by means of an originally relatively low voltage can be charged to the high voltage.
Diese Aufgabe wird bei der elektrostatischen Sprühvorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Elektrode die Hochspannung mittels ionisierten Gases zugeführt wird, wobei die Ionisierung des Gases bei seiner Durchleitung durch ein elektrisches Feld einer Koronaentladung erfolgt. This task is done with the electrostatic spray device of the type mentioned at the outset, according to the invention, in that the high voltage is applied to the electrode is supplied by means of ionized gas, the ionization of the gas as it passes through takes place by an electric field of a corona discharge.
Die Ionisierung des Gases kann in vorteilhafter Weise dadurch erfolgen, daß eine unter elektrischer Spannung liegende Koronaspitze in eine geerdete Düse hineinragt, wobei die Düse in ein die Elektrode einmündendes Rohr mündet und die Düse an eine Druckgasquelle angeschlossen ist.The ionization of the gas can be carried out in an advantageous manner that one under electrical voltage lying corona tip protrudes into a grounded nozzle, wherein the nozzle opens into a electrode Tube opens and the nozzle is connected to a source of pressurized gas.
In bevorzugter Weise kann die Elektrode so ausgebildet sein, daß sie eine hohle Wandung aufweist und im Hohlraum Metallspäne, Baum- oder Leinenwolle zum Auffangen der mit dem Gasstrom transportierten elektrischen Ladung angeordnet sind.In a preferred manner, the electrode can be designed so that it has a hollow wall and In the cavity, metal shavings, cotton or linen wool to collect those transported with the gas flow electric charge are arranged.
Die bei der Erfindung erzielten Vorteile sind insbesondere darin zu sehen, daß die der Sprühdüse zugeordnete Elektrode in einfacher Weise mittels einer ursprünglich relativ niedrigen Spannung auf Hochspannung aufgeladen werden kann. Außerdem ergibt sich eine hohe Sicherheit bei Berührung der Elektrode, da die leitenden Teile der Koronavorrichtung in weitern Abstand und isoliert zur Elektrode angeordnet werden können. Ferner kann bei einer Entladung der Elektrode z. B. durch Berührung oder Funkenüberschlag nur die in der Elektrode gespeicherte Energiemenge abströmen, während nur geringe elektrische Energiemengen durch den Gasstrom nachgeliefert werden.The advantages achieved in the invention are particular it can be seen that the electrode associated with the spray nozzle in a simple manner by means of a originally relatively low voltage can be charged to high voltage. It also results a high level of safety when touching the electrode, since the conductive parts of the corona device widen Can be arranged at a distance and insulated from the electrode. Furthermore, when the electrode is discharged z. B. only the amount of energy stored in the electrode escapes through contact or arcing, while only small amounts of electrical energy are supplied by the gas flow.
In der Figur ist ein bevorzugtes Ausführungsbeispiel der Erfindung dargestellt, und es soll an Hand dieser Figur die Erfindung noch näher erläutert werden.In the figure, a preferred embodiment of the invention is shown, and it should be based on this Figure the invention will be explained in more detail.
In der Figur ist zwischen einer geerdeten Spritzpistole 10 und dem nicht näher dargestellten zu besprühenden Gut, das ebenfalls im elektrostatischen Sinne geerdet ist, eine Elektrode 5 angeordnet, die durch einen mittels eines Druckgases 4 angetriebenen Ionenstrom einer Polarität aufgeladen wird.In the figure is between a grounded spray gun 10 and the not shown to be sprayed Well, which is also grounded in the electrostatic sense, an electrode 5 is arranged through an ion current of one polarity driven by means of a compressed gas 4 is charged.
Die Aufladeeinrichtung für die Elektrode 5 weist eine geerdete Düse 2 auf, in die eine Koronaspitze 1 hineinragt. Die Koronaspitze 1 erhält die notwendige Spannung, welche an Klemmen 8 und 9 vorhanden ist, über einen Widerstand 7. An die geerdete Düse 2 schließt sich ein enges Rohr 3 an, das einen gleichen oder wenig größeren Innendurchmesser als die Düse selbst aufweist. Das Rohr 3 mündet in die hohle Elektrode 5, die mit Metallspänen oder Baum- oder auch Leinenwolle gefüllt ist.The charging device for the electrode 5 has a grounded nozzle 2 into which a corona tip 1 protrudes. The corona tip 1 receives the necessary voltage, which is present at terminals 8 and 9, via a resistor 7. A narrow pipe 3 connects to the grounded nozzle 2, which is the same or a little has a larger inner diameter than the nozzle itself. The tube 3 opens into the hollow electrode 5, the is filled with metal shavings or cotton or linen wool.
Die Elektrode 5 ist mechanisch mit der Spritzpistole 10 über einen Isolator 13 verbunden. Der Isolator 13 enthält öffnungen 6, welche einen ungestörten Zustrom von Luft quer zu einem Sprühstrahl 11 ermöglichen. Falls die Elektrode 5 relativ lang ausgebildet ist, kann sie ebenfalls öffnungen aufweisen.The electrode 5 is mechanically connected to the spray gun 10 via an insulator 13. The isolator 13 contains openings 6 which allow an undisturbed inflow of air across a spray jet 11. If the electrode 5 is made relatively long, it can also have openings.
Die Aufladung der Elektrode 5 ergibt sich folgendermaßen: The charging of the electrode 5 results as follows:
Wenn das Druckgas 4 in dem Bereich der hohen Feldstärke zwischen der Koronaspitze 1 und der geerdeten Düse 2 gelangt, wird die Koronaspitze mit Ionen einer Polarität beladen und auf Grund der hohen Gasgeschwindigkeit aus diesen Bereich herausgeblasen, so daß die Ionen nicht von der Koronaspitze 1 zur geerdeten Düse 2 gelangen. Die Ionen werden vielmehr von dem Druckgas in das enge Rohr 3 mitgerissen. Das Rohr 3 ist deshalb eng ausgebildet, damit die Gasgeschwindigkeit auch nach dem Herausblasen aus der Düse 2 groß bleibt und die Gasionen mit ihrer hohen Beweglichkeit gegen das elektrische Feld, das zwischen der Elektrode 5 und der geerdeten Düse 2 herrscht, auf die Elektrode 5 hingetrieben werden. In der hohlen Elektrode 5 werden die Gasionen entladen, indem sie in den lockeren Metallspänen bzw. in der Baum- oder Leinenwolle ihre Ladung abgeben und damit die Elektrode 5 aufladen.When the compressed gas 4 in the area of high field strength between the corona tip 1 and the grounded When nozzle 2 arrives, the corona tip is charged with ions of one polarity and due to the high gas velocity blown out of this area so that the ions are not from the corona tip 1 to the grounded Nozzle 2. Rather, the ions are entrained into the narrow tube 3 by the pressurized gas. That Tube 3 is therefore made narrow, so that the gas velocity even after blowing out of the Nozzle 2 remains large and the gas ions with their high mobility against the electric field that is between the electrode 5 and the grounded nozzle 2 prevails, are driven towards the electrode 5. In the hollow Electrode 5, the gas ions are discharged by being in the loose metal chips or in the cotton or linen wool release their charge and thus charge the electrode 5.
Beim Austreten der geladenen Tröpfchen des Sprühstrahles 11, der in Richtung eines Pfeiles 12 auf den zu besprühenden Gegenstand gerichtet ist, wird elektrische Arbeit an den geladenen Tröpfchen geleistet, d. h., im elektrischen Feld der Elektrode 5 werden die geladenen Tröpfchen auf das zu besprühende Gut in Richtung des Pfeiles 12 hingetrieben.When the charged droplets of the spray jet 11 emerge, which is directed in the direction of an arrow 12 towards the directed at the object being sprayed, electrical work is done on the charged droplets; H., in the electric field of the electrode 5, the charged droplets are directed towards the material to be sprayed the arrow 12 drifted.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US88232A US3700168A (en) | 1966-04-28 | 1970-11-09 | Spray coating apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF0049045 | 1966-04-28 | ||
| DEF0049044 | 1966-04-28 | ||
| DEF0049046 | 1966-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE1577739A1 DE1577739A1 (en) | 1971-12-09 |
| DE1577739B2 true DE1577739B2 (en) | 1975-09-11 |
Family
ID=27210477
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1577739A Withdrawn DE1577739B2 (en) | 1966-04-28 | 1966-04-28 | Electrostatic spray device |
| DE19661577738 Pending DE1577738A1 (en) | 1966-04-28 | 1966-04-28 | Device for electrostatic spray coating |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19661577738 Pending DE1577738A1 (en) | 1966-04-28 | 1966-04-28 | Device for electrostatic spray coating |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3606972A (en) |
| AT (1) | AT285773B (en) |
| CH (1) | CH462680A (en) |
| DE (2) | DE1577739B2 (en) |
| GB (1) | GB1188682A (en) |
| NL (3) | NL6705989A (en) |
| SE (1) | SE322453B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015213732A1 (en) * | 2015-07-21 | 2017-01-26 | Volkswagen Aktiengesellschaft | Atomizer and method for coating a surface with an electrostatically charged coating material |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1507562A (en) * | 1974-04-01 | 1978-04-19 | Ppg Industries Inc | Electrostatic induction charging adapter for a spray coating apparatus |
| US4347984A (en) * | 1974-04-01 | 1982-09-07 | Ppg Industries, Inc. | Electrostatic spray coating apparatus |
| CH579951A5 (en) * | 1975-04-11 | 1976-09-30 | Gema Ag | |
| US4190875A (en) * | 1976-10-04 | 1980-02-26 | The Ritten Corporation, Ltd. | Apparatus for removing particulate matter from an atmosphere |
| JPS5359737A (en) * | 1976-11-10 | 1978-05-29 | Onoda Cement Co Ltd | Electrostatic powder coating and its equipment |
| JPS5554053A (en) * | 1978-10-17 | 1980-04-21 | Asahi Okuma Ind Co Ltd | Spray nozzle for electrostatic airless coating |
| DE3412694A1 (en) * | 1983-04-07 | 1984-10-11 | Kopperschmidt-Mueller GmbH & Co KG, 7057 Winnenden | METHOD AND DEVICE FOR ELECTROSTATICALLY SPRAYING ON POWDER PARTICLES ON A SURFACE TO BE COATED |
| US4669671A (en) * | 1986-03-06 | 1987-06-02 | Hastings Edward E | Pollutant suppression device |
| US5725161A (en) * | 1995-02-28 | 1998-03-10 | Nordson Corporation | Electrostatic coating system including improved spray gun for conductive paints |
| US20070194157A1 (en) * | 2002-08-06 | 2007-08-23 | Clean Earth Technologies, Llc | Method and apparatus for high transfer efficiency electrostatic spray |
| US8585854B2 (en) | 2007-03-27 | 2013-11-19 | Butterworth Industries, Inc. | Polymeric cover for robots |
| WO2009056950A1 (en) * | 2007-10-31 | 2009-05-07 | Eurosider Sas | Spray painting device with ionization of the carrier fluid |
| FI20080674A0 (en) * | 2008-12-22 | 2008-12-22 | Beneq Oy | Procedure for coating glass |
| CN105939788B (en) | 2013-12-04 | 2019-08-30 | 托马斯·迈尔 | Compressed air prepares chamber |
| JP6112130B2 (en) * | 2015-03-25 | 2017-04-12 | トヨタ自動車株式会社 | Electrostatic nozzle, discharge device, and method for manufacturing semiconductor module |
| CN107096658A (en) * | 2017-04-21 | 2017-08-29 | 昆明七零五所科技发展总公司 | A kind of tobacco charging electrostatic atomization nozzle |
-
0
- NL NL133488D patent/NL133488C/xx active
-
1966
- 1966-04-28 DE DE1577739A patent/DE1577739B2/en not_active Withdrawn
- 1966-04-28 DE DE19661577738 patent/DE1577738A1/en active Pending
-
1967
- 1967-04-24 AT AT387067A patent/AT285773B/en not_active IP Right Cessation
- 1967-04-27 GB GB09535/67A patent/GB1188682A/en not_active Expired
- 1967-04-27 NL NL6705989A patent/NL6705989A/xx unknown
- 1967-04-27 SE SE6011/67A patent/SE322453B/xx unknown
- 1967-04-28 CH CH611767A patent/CH462680A/en unknown
-
1969
- 1969-05-12 US US826071A patent/US3606972A/en not_active Expired - Lifetime
-
1970
- 1970-10-28 NL NL7015815A patent/NL7015815A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015213732A1 (en) * | 2015-07-21 | 2017-01-26 | Volkswagen Aktiengesellschaft | Atomizer and method for coating a surface with an electrostatically charged coating material |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1188682A (en) | 1970-04-22 |
| US3606972A (en) | 1971-09-21 |
| NL7015815A (en) | 1971-02-25 |
| DE1577737A1 (en) | 1970-07-30 |
| CH462680A (en) | 1968-09-15 |
| AT285773B (en) | 1970-11-10 |
| SE322453B (en) | 1970-04-06 |
| NL133488C (en) | |
| NL6705989A (en) | 1967-10-30 |
| DE1577738A1 (en) | 1972-05-04 |
| DE1577739A1 (en) | 1971-12-09 |
| DE1577737B2 (en) | 1975-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8230 | Patent withdrawn |