EP0718043B1 - Pulverbeschichtigungsanlage - Google Patents
Pulverbeschichtigungsanlage Download PDFInfo
- Publication number
- EP0718043B1 EP0718043B1 EP95116617A EP95116617A EP0718043B1 EP 0718043 B1 EP0718043 B1 EP 0718043B1 EP 95116617 A EP95116617 A EP 95116617A EP 95116617 A EP95116617 A EP 95116617A EP 0718043 B1 EP0718043 B1 EP 0718043B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- compressed air
- filter element
- casing
- powder coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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 powder coating system according to the preamble of claim 1.
- a powder coating system according to the preamble of claim 1.
- Such a system is out DE-A-2 264 386 known.
- EP 0 184 994 B2 also describes the use of a Muffler as an air atomizer nozzle in one Powder container known.
- EP 0 452 635 B1 shows one Injector device in a powder coating system.
- Coating powder often gets into injectors, especially during cleaning with compressed air and with pulsating powder feed operation, against the Direction of air flow back into the air ducts. This powder can be up to a control unit of the Injector can be traced. The Coating powder accumulates in niches and sharp corners. Such powder contamination within the channels of the injector device and the connected to the air lines and the Air lines connected devices are undesirable, because they affect the functionality. Powder deposits in the air ducts and air lines can loosen from time to time and are then from the compressed air as powder pats on the surface to be coated Object sprayed and form coating defects there.
- the injector devices must be at one Powder change (change from one type of powder to another other powder) must be cleaned very carefully, otherwise powder residues from the first powder will be added later contaminate other powders used.
- Powder change change from one type of powder to another other powder
- For one Cleaning usually needs the whole Injector device disassembled and with Compressed air can be cleaned.
- For a quick Color change it is desirable that only the Injector needs to be blown out without the whole injector device is taken apart.
- the object of the invention is to solve a problem Penetration of coating powder in Air supply lines against the air supply direction so to prevent a quick color change is possible and there are no coating defects.
- the injector device shown in Fig. 1 has one Injector housing 2, in which a powder channel 4 and a Powder suction channel 6 formed at right angles to each other which are at their mutually facing ends an angular transition channel 8 in terms of flow are interconnected.
- the radially outer wall 10 of the angular transition channel 8 runs arched steplessly from its one angle leg 12 to his other angle leg 14.
- In one Angle leg 12 opens continuously into Flow direction continuously narrowing frustoconical end portion 16 of the Powder suction channel 6.
- the powder channel 4 has at its upstream beginning one in the direction of flow infinitely conically narrowing initial section 18, which is infinitely variable on the other angle leg 14 connects.
- a cylindrical channel section 20 of the powder channel 4 the cross section of the same size is like the cross section of the conically narrowing Initial section 18 at its downstream end.
- On the cylindrical section 20 closes downstream in the flow direction continuously conical channel section 22 of the Powder channel 4.
- the powder channel 4 is through a tube 24 is formed, which in the injector housing 2 is screwed in and replaced when worn can be.
- transition channel 8 protrudes axially against the upstream initial section 18 of the powder channel 4 directional injector nozzle 26, which has a powder lock 28 to a compressed air line, not shown Supply of pressure-conveying air 30 in terms of flow connected.
- This conveying air 30 flows from the Injector nozzle 26 in the powder channel 2 and thereby generated a vacuum or suction in the transition channel 8 what powder from a not shown Powder container through the powder suction channel 6 in the Powder channel 4 is sucked and then together with the Conveying air 30 through the powder channel 4 to one not shown powder spray device flows.
- a plurality of through holes 32 are in the tube 24 formed, which obliquely to the powder flow direction in the expanding channel section 22 of the Powder channel 4 open and radially outside the tube 24 through an annular space 34 with one another Are flow connection, which by a Filter element 36 is filled from microporous material, that serves as a powder barrier.
- the microporous material can be sintered bronze, sintered aluminum or sintered plastic, e.g. Polyethylene, or a other material.
- the filter element 36 surrounds the Powder channel 4 coaxial.
- the through holes 32 are formed at the downstream end of the annular space 34.
- the two powder barriers 28 and also as Prevent filter element 36 used powder lock that powder against the flow direction of the Conveying air 30 and the additional air 42 from the powder channel 4 including the transition channel 8 in the Air channels of the conveying air 30 and the additional air 42 arrives upstream of the injector housing 2.
- the Powder lock 28 of the additional air 42 and the filter element 36 are thought of as two alternative ways because one of the two is already sufficient, an intrusion of Powder from powder duct 4 into the additional air-air duct to prevent. Since no powder in the Feed channels or feed lines of the conveying air 30 or can get additional air 42 needs the No injector device when changing powder to be taken apart, it suffices Rinsing the completely assembled injector device using compressed air before changing from a powder type to a other powder is changed. Since all channels, which are flowed through by powder, stepless and are designed without niches, can in the Do not collect powder particles, which the cleaning of the completely assembled could complicate or prevent injector device.
- Fig. 2 shows in axial section and in a larger one 1 as an advantageous embodiment the powder barrier 28. It has a tubular Powder lock housing 50, which consists of a tubular first housing part 52 and a tubular second Housing part 54 is arranged axially to each other and releasable by means of a threaded connection 56 are screwed together.
- the first housing part 52 has an axial first through bore 58 provided that has an internal thread 60.
- the outer part the through hole 58 serves as a channel connection means for connecting a hose line or a Pipeline, through which the compressed air shaft Conveying air 30 or the additional air 42 is supplied.
- the second housing part 54 is cup-shaped and has one cylindrical housing shell wall 70 and at one Front end of a housing base 62.
- the housing base 62 has an axial second through bore 64 provided, which is also by an axial Connection piece 66 of the housing base 62 through extends, on which an external thread 68 located.
- the external thread 68 serves as the second Channel connection means for connecting the with respect to the Flow direction of the conveying air 30 or the additional air 42 downstream end of the powder barrier 28 to channels (Injector nozzle 26 and / or additional air channels 38, 34, 32) in the injector housing 2.
- cup-shaped filter element 36.2 made of microporous Material.
- the microporous material can be sintered bronze, sintered aluminum or sintered plastic, for Example, polyethylene, or another material. Its pore size can range, for example are between 5 ⁇ m and 80 ⁇ m. The pores extend through the entire filter element 36.2, so it’s only for compressed air, but not for Coating powder is permeable.
- the carrier 72 carries the filter element 36.2 and has a threaded base 74, which in the downstream End of the internal thread 60 is screwed.
- the carrier 72 is with an axial through bore 78 and provided radial bores 80 branching from it, which into a cylindrical elongated annular space 82 open, which between the carrier 72 and one cylindrical filter jacket wall 84 of the filter element 36.2 is formed.
- the cup-shaped filter element 36.2 is without carrier 72 as Compressed air silencers are commercially available and therefore an inexpensive mass-produced item.
- the powder lock 28 can also be in the opposite direction be used in such a way that not the outside, but the inside of the cup-shaped Filter element 36.2 the powder space to be shielded (Transition channel 8 with negative pressure area or Powder channel 4) limited and the conveying air 30 or Additional air 42 from the outside through the second Through hole 64 in the second housing part 54 flows in and out through the first through bore 58 flows out of the first housing part 52.
Landscapes
- Nozzles (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Description
- Fig. 1
- schematisch eine Injektorvorrichtung teilweise im Axialschnitt, mit zwei Luftzufuhrgeräten nach der Erfindung, im folgenden "Pulversperre" genannt,
- Fig. 2
- einen vergrößerten Axialschnitt durch eine der beiden Pulversperren, welche in Pulverkanäle oder Pulverleitungen als Zwischenstück eingesetzt werden kann, um ein Eindringen von Pulver entgegen der Luftzufuhrrichtung zu verhindern.
Claims (7)
- Pulverbeschichtungsanlage mit mindestens einem Filter in einem Druckluftweg, welcher an einen Pulverförderkanal (4) anschließbar ist, um Druckluft in den Pulverförderkanal (4) zu leiten, dadurch gekennzeichnet, daß der Filter eine Pulversperre (28) ist, die ein rohrartiges Gehäuse (50) aus für Druckluft undurchlässigem Material und mindestens ein Filterelement (36.2) hat, daß das Filterelement (36.2) im Gehäuse (50) zwischen zwei Druckluftweg-Anschlußmitteln (58, 60, 64, 68) angeordnet ist, die nur durch das Filterelement (36.2) hindurch miteinander Strömungsverbindung haben, und daß das Filterelement (36.2) aus einem mikroporösen Material besteht, welches nur für Luft, jedoch nicht für Beschichtungspulver durchlässig ist, um ein Eindringen von Pulver aus dem Pulverförderkanal (4) entgegen der Druckluft-Strömungsrichtung in den Druckluftweg, von dem mit Bezug auf die Druckluft-Zufuhrrichtung stromabwärtigen Druckluftweg-Anschlußmittel (64, 66, 68) in das mit Bezug auf die Druckluft-Zufuhrrichtung stromaufwärtige Druckluftweg-Anschlußmittel (58, 60), zu verhindern.
- Pulverbeschichungsanlage nach Anspruch 1,
dadurch gekennzeichnet, daß das Filterelement (36.2) eine zylindrische Mantelwand (84) hat, deren Material von der Luft radial und axial durchströmt wird. - Pulverbeschichtungsanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Filterelement (36.2) becherförmig hohl ist und einen Becherboden (71) hat, der von der Luft im wesentlichen in Gehäuse-Axialrichtung durchströmt wird.
- Pulverbeschichtungsanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Filterelement (36.2) an einem Träger (72) befestigt ist, welcher im Gehäuse (50) lösbar befestigt ist und Durchgangsöffnungen (78, 80) hat, die eine Seite des Filterelements (36.2) mit nur einem der Druckluftweg-Anschlußmittel (58, 60) strömungsmäßig verbinden. - Pulverbeschichtungsanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Filterelement (36.2) ein handelsüblicher Druckluft-Schalldämpfer ist. - Pulverbeschichtungsanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Gehäuse (50) aus zwei axial zueinander angeordneten und miteinander lösbar verbundenen Gehäuseteilen (52, 54) besteht, daß das Filterelement (36.2) von der Gehäuseinnenseite her an einen der beiden Gehäuseteile (52) angeschraubt ist und dadurch nur nach Trennung der beiden Gehäuseteile (52, 54) ausgetauscht werden kann, daß jeder der beiden Gehäuseteile (52, 54) mit einem der beiden Druckluftweg-Anschlußmittel (58, 60, 64, 66, 68) versehen ist. - Pulverbeschichtungsanlage nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Pulversperre (28) am stromabwärtigen Ende des Druckluftweges nahe am Pulverkanal (4) angeordnet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4446798 | 1994-12-24 | ||
DE4446798A DE4446798A1 (de) | 1994-12-24 | 1994-12-24 | Luftzufuhrgerät einer Pulverbeschichtungsanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0718043A1 EP0718043A1 (de) | 1996-06-26 |
EP0718043B1 true EP0718043B1 (de) | 1999-09-01 |
Family
ID=6537267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95116617A Expired - Lifetime EP0718043B1 (de) | 1994-12-24 | 1995-10-21 | Pulverbeschichtigungsanlage |
Country Status (3)
Country | Link |
---|---|
US (1) | US5704957A (de) |
EP (1) | EP0718043B1 (de) |
DE (2) | DE4446798A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19748375A1 (de) | 1997-11-03 | 1999-05-06 | Itw Gema Ag | Verfahren und Vorrichtung zum Pulver-Sprühbeschichten |
DE19748376A1 (de) | 1997-11-03 | 1999-05-06 | Itw Gema Ag | Verfahren und Vorrichtung zum Pulver-Sprühbeschichten |
DE19824802A1 (de) * | 1998-06-03 | 1999-12-09 | Itw Gema Ag | Pulverförder-Injektor |
US6705545B1 (en) | 1998-11-13 | 2004-03-16 | Steelcase Development Corporation | Quick color change powder paint system |
US6112999A (en) | 1998-11-13 | 2000-09-05 | Steelcase Development Inc. | Powder paint system and control thereof |
US6010082A (en) * | 1998-11-17 | 2000-01-04 | Peterson; Kurt E. | In-line point of use filter with restrictor valve and gauge port |
US6149703A (en) * | 1999-06-10 | 2000-11-21 | Siemens Westinghouse Power Corporation | Fuel system filtering apparatus |
US6695220B2 (en) | 2001-01-11 | 2004-02-24 | Herman Miller, Inc. | Powder spray coating system |
DE10109297C1 (de) * | 2001-02-26 | 2002-04-18 | Schuettguttechnik Freital Gmbh | Einblasdüse |
DE102004043411B3 (de) * | 2004-09-02 | 2006-05-04 | Weitmann & Konrad Gmbh & Co Kg | Vorrichtung und Verfahren zum Erzeugen eines Puder-Luft-Gemisches |
EP2279797B1 (de) | 2007-05-09 | 2016-01-13 | Nordson Corporation | Düse mit internem filter |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US928710A (en) * | 1909-04-09 | 1909-07-20 | Frank Svagell | Carbureter. |
US2800977A (en) * | 1954-01-14 | 1957-07-30 | Sprague Meter Company | Dust filter means |
US2792073A (en) * | 1955-04-19 | 1957-05-14 | United States Steel Corp | Air filter and oiler for pneumatic tools |
US3783590A (en) * | 1970-07-09 | 1974-01-08 | A Allen | Filter-silencer for pneumatic devices |
DE2264386C2 (de) * | 1971-11-02 | 1982-04-22 | Nordson Corp., 44001 Amherst, Ohio | Elektrostatische Sprühpistole |
US3898063A (en) * | 1973-02-23 | 1975-08-05 | George A Gazan | Combination muffler and filter device |
FR2278393A1 (fr) * | 1974-07-16 | 1976-02-13 | France Etat | Dispositif de fluidisation et de distribution de poudres |
JPS5781854A (en) * | 1980-11-06 | 1982-05-22 | Aisin Seiki Co Ltd | Method and apparatus for electrostatic powder painting |
US4493717A (en) * | 1982-05-06 | 1985-01-15 | Berger Jr L Joseph | In-line disposable filter |
DE3231594A1 (de) * | 1982-08-25 | 1984-03-01 | Anatolij Ivanovič Egoruškin | Vorrichtung zum verstaeuben eines pulverfoermigen stoffes |
US4526593A (en) * | 1983-04-04 | 1985-07-02 | International Business Machines Corporation | Restrictor plug device with filter for a gas supply system |
EP0184994B2 (de) | 1984-09-26 | 1992-11-19 | Siegfried Frei | Pulverabsaugvorrichtung |
JPS61127806A (ja) * | 1984-11-27 | 1986-06-16 | Kobe Steel Ltd | 金属精錬炉における激粉末及びガス吹込装置 |
DE3542710A1 (de) * | 1985-12-03 | 1987-06-04 | Bohnacker Tegometall | Vorrichtung zum farbpulvereinzug beim pulverlackieren |
US4730647A (en) * | 1986-12-08 | 1988-03-15 | Nordson Corporation | Powder feeder apparatus |
US4810272A (en) * | 1987-11-02 | 1989-03-07 | La-Man Corporation | Air inlet valve arrangement for pneumatic equipment |
US5083710A (en) * | 1988-09-06 | 1992-01-28 | Oxy-Dry Corporation | Powder sprayer with automatic powder supply system |
AU4141889A (en) * | 1988-10-20 | 1990-04-26 | Nordson Corporation | Powder or solid particulate material spray gun |
US5037247A (en) * | 1989-11-29 | 1991-08-06 | Nordson Corporation | Powder pump with internal valve |
DE4012190A1 (de) | 1990-04-14 | 1991-10-17 | Gema Ransburg Ag | Pneumatische pulvertransportvorrichtung |
DE4040640A1 (de) * | 1990-12-19 | 1992-07-02 | Kernforschungsz Karlsruhe | Entnahmefilter fuer die teilstromanalyse von gasstroemen |
AT396456B (de) * | 1991-11-19 | 1993-09-27 | Iskra Julij Ing | Vorrichtung zum entnehmen von pulverförmigen substanzen |
KR0177533B1 (ko) * | 1993-02-11 | 1999-03-20 | 길버트 피. 와이너 | 배관용 필터 |
-
1994
- 1994-12-24 DE DE4446798A patent/DE4446798A1/de not_active Withdrawn
-
1995
- 1995-10-21 EP EP95116617A patent/EP0718043B1/de not_active Expired - Lifetime
- 1995-10-21 DE DE59506722T patent/DE59506722D1/de not_active Expired - Lifetime
- 1995-12-18 US US08/572,896 patent/US5704957A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE4446798A1 (de) | 1996-06-27 |
DE59506722D1 (de) | 1999-10-07 |
US5704957A (en) | 1998-01-06 |
EP0718043A1 (de) | 1996-06-26 |
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