EP0718047B1 - Injektorvorrichtung zur Beförderung von Beschichtungspulver - Google Patents
Injektorvorrichtung zur Beförderung von Beschichtungspulver Download PDFInfo
- Publication number
- EP0718047B1 EP0718047B1 EP95116541A EP95116541A EP0718047B1 EP 0718047 B1 EP0718047 B1 EP 0718047B1 EP 95116541 A EP95116541 A EP 95116541A EP 95116541 A EP95116541 A EP 95116541A EP 0718047 B1 EP0718047 B1 EP 0718047B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- channel
- filter element
- air
- injector device
- 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 an injector device for Promotion of coating powder in one Powder coating system according to the generic term of Claim 1.
- EP 0 452 635 B1 Such an injector device is known from EP 0 452 635 B1 known.
- EP 0 184 994 B2 describes the use of a Muffler as an air atomizer nozzle in one Powder container known.
- EP 0 492 088 A1 shows one Device for filling very fine powder material in very long and narrow cavities that have an opening with a have a relatively small cross-section.
- a Delivery opening for one loaded with powder particles Gas flow is directed against the opening, but has from this a gap, so that the powder particles in flow through the opening and the gas escapes through the gap can.
- the patent DE 32 31 594 C2 shows one to one Aerosol counter connectable device for diluting the Concentration of powdery substances.
- 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 invention is intended to achieve the abovementioned Disadvantages are avoided.
- the Invention designed the injector device in such a way that it can be cleaned quickly. It should have little or no powder deposits can take place in it and there should be none Coating powder from the powder path into the Compressed air supply lines can migrate.
- the duct transition from a powder suction duct to one powder channel arranged at an angle to it in an arc runs without jumps, at least the radially outer Arch wall steplessly round from the powder suction channel into the Powder channel runs.
- the powder channel can be an upstream Have initial section, which in Flow direction of the coating powder continuously becomes conically narrower so that there are no corners or niches are present on which powder sinter or can pile up.
- the arched transition from Powder suction channel in the powder channel is like this trained that he does not form niches in which powder can accumulate or accumulate.
- 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 4 and 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 upstream beginning of the annulus 34 is through a radial bore 38 in the injector housing 2 directly to it or via a second powder lock 28 to one not illustrated additional pressure air line for the supply of Additional air 42 connected in terms of flow.
- the additional air 42 flows radially and axially through the material of the Filter element 36.
- 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)
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
Description
- Fig. 1
- schematisch eine Injektorvorrichtung nach der Erfindung, teilweise im Axialschnitt, zur Förderung von Beschichtungspulver in einer Pulverbeschichtungsanlage,
- Fig. 2
- einen vergrößerten Axialschnitt durch eine Pulversperre, welche in Pulverkanäle oder Pulverleitungen als Zwischenstück eingesetzt werden kann, um ein Eindringen von Pulver entgegen der Luftzufuhrrichtung zu verhindern.
Claims (10)
- Injektorvorrichtung zur Förderung von Beschichtungspulver in einer Pulverbeschichtungsanlage, enthaltend einen Pulverkanal (4), einen Übergangskanal (8) von einem Pulveransaugkanal (6) zu einem stromaufwärtigen Anfang (18) des Pulverkanals (4) zum Saugen von Beschichtungspulver durch den Pulveransaugkanal (6) in den Pulverkanal (4); mindestens einen Luftweg (28, 26; 28, 38, 34, 32) zur Zufuhr von Druckluft in den Pulverkanal (4), wobei mindestens einer dieser Luftwege ein Förderluftweg (28, 26) zur Zufuhr von Förderluft (30) ist, die im Übergangskanal (8) Beschichtungspulver ansaugt;
dadurch gekennzeichnet, daß im stromabwärtigen Ende in mindestens einem der Luftwege (28, 26; 28, 38, 34, 32) mindestens ein Filterelement (36, 36.2) aus mikroporösem Filtermaterial angeordnet ist, welches für Luft, jedoch nicht für Beschichtungspulver durchlässig ist und ein Eindringen von Beschichtungspulver aus dem Pulverweg, welcher durch den Übergangskanal (8) und den Pulverkanal (4) gebildet ist, in den Luftweg (28, 26; 28, 38, 34, 32) verhindert. - Injektorvorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der Pulveransaugkanal (6) und der Pulverkanal (4) winkelig zueinander angeordnet und durch den zwischen ihnen winkelförmig gebildeten Übergangskanal (8) strömungsmäßig miteinander verbunden sind, welcher zumindest an seinem radial äußeren Winkelbereich stufenlos bogenförmig von einem Winkelschenkel (12) zum anderen Winkelschenkel (14) übergeht. - Injektorvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Pulverkanal (4) an seinem stromaufwärtigen Anfang einen in Strömungsrichtung stufenlos konisch enger werdenden Kanalabschnitt (18) aufweist, dessen größter Querschnitt an seinem stromaufwärtigen Anfang gleichgroß ist wie der an ihn stufenlos angrenzende Teil des Übergangskanals (8) und dessen stromabwärts gelegener kleinster Querschnitt gleich groß ist wie der an ihn stufenlos anschließende nächste Kanalabschnitt (20) des Pulverkanals (4). - Injektorvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Filterelement (36; 36.2) einen hohlen Zylinder bildet, dessen zylindrische Filtermantelwand (84) in dem betreffenden Luftweg längs und quer zur Zylinderlängsachse von Luft durchströmbar angeordnet ist. - Injektorvorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß die zylinderförmige Filtermantelwand (84) des Filterelements (36) den Pulverkanal (4) umgibt. - Injektorvorrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß das Filterelement (36.2) ein handelsüblicher Schalldämpfer ist, der mit Befestigungsmitteln zur Befestigung im Luftkanal versehen ist. - Injektorvorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß der Luftweg (28) als Pulversperre ein rohrartiges Pulversperre-Gehäuse (50) aufweist, in welchem das Filterelement (36.2) untergebracht ist und welches stromaufwärts und stromabwärts des Filterelements (36.2) je ein Kanalanschlußmittel (58, 60, 64, 66, 68) zum Einbau des Pulversperre-Gehäuses (50) in den Luftweg aufweist. - Injektorvorrichtung nach Anspruch 7,
dadurch gekennzeichnet, daß das Filterelement (36.2) einen Becher mit einer zylinderförmigen Filtermantelwand (84) und einem Filterboden (71) an einem Stirnende der Filtermantelwand (84) bildet, und daß von der offenen Stirnseite des becherförmigen Filterelements (36.2) her ein Träger (72) in dieses Filterelement (36.2) hineinragt, welcher das Filterelement (36.2) im Pulversperre-Gehäuse (50) hält und mit Durchgangsöffnungen (78, 80) versehen ist, welche eines der Kanalanschlußmittel (58, 60) mit den Innenflächen der Filtermantelwand (84) und des Filterbodens (71) strömungsmäßig verbindet, während die Außenfläche der Bechermantelwand (84) und des Becherbodens (71) mit dem anderen Kanalanschlußmittel (64, 66, 68) strömungsmäßig verbunden ist. - Injektorvorrichtung nach Anspruch 7,
dadurch gekennzeichnet, daß das Filterelement (36.2) einen hohlen Zylinder (84) mit einer offenen Stirnseite bildet, in welchen ein Träger (72) hineinragt, welcher das Filterelement (36.2) im Pulversperre-Gehäuse (50) hält und mit Durchgangsöffnungen (78, 80) versehen ist, welche eines der Kanalanschlußmittel (58, 60) mit der Innenfläche des hohlen Zylinders (84) strömungsmäßig verbindet, während die Außenfläche des hohlen Zylinders (84) mit dem anderen Kanalanschlußmittel (64, 66, 68) strömungsmäßig verbunden ist. - Injektorvorrichtung nach einem der Ansprüche 7 bis 9,
dadurch gekennzeichnet, daß das Pulversperre-Gehäuse (50) aus zwei lösbar miteinander verbundenen, axial zueinander angeordneten rohrartigen Gehäuseteilen (52, 54) besteht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4446797A DE4446797A1 (de) | 1994-12-24 | 1994-12-24 | Injektorvorrichtung zur Beförderung von Beschichtungspulver |
DE4446797 | 1994-12-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0718047A2 EP0718047A2 (de) | 1996-06-26 |
EP0718047A3 EP0718047A3 (de) | 1998-12-30 |
EP0718047B1 true EP0718047B1 (de) | 2000-03-01 |
Family
ID=6537266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95116541A Expired - Lifetime EP0718047B1 (de) | 1994-12-24 | 1995-10-20 | Injektorvorrichtung zur Beförderung von Beschichtungspulver |
Country Status (3)
Country | Link |
---|---|
US (1) | US5645380A (de) |
EP (1) | EP0718047B1 (de) |
DE (2) | DE4446797A1 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20321762U1 (de) | 1988-05-11 | 2009-08-27 | H. Börger & Co. GmbH | Vorrichtung zum Fördern von pulverförmigem Material |
DE19836018A1 (de) * | 1998-08-10 | 2000-02-17 | Weitmann & Konrad Fa | Verfahren und Vorrichtung zum Bestäuben von bedruckten Bogen |
US6112999A (en) | 1998-11-13 | 2000-09-05 | Steelcase Development Inc. | Powder paint system and control thereof |
US6705545B1 (en) | 1998-11-13 | 2004-03-16 | Steelcase Development Corporation | Quick color change powder paint system |
US6756561B2 (en) | 1999-09-30 | 2004-06-29 | National Research Council Of Canada | Laser consolidation apparatus for manufacturing precise structures |
US6695220B2 (en) | 2001-01-11 | 2004-02-24 | Herman Miller, Inc. | Powder spray coating system |
GB0100756D0 (en) * | 2001-01-11 | 2001-02-21 | Powderject Res Ltd | Needleless syringe |
DE102007007588A1 (de) * | 2007-02-13 | 2008-08-14 | Itw Gema Ag | Pulverfördervorrichtung für Sprühbeschichtungspulver |
EP1958899B1 (de) * | 2007-02-16 | 2013-08-21 | J. Wagner AG | Vorrichtung zum Fördern von Fluid |
GB0708758D0 (en) | 2007-05-04 | 2007-06-13 | Powderject Res Ltd | Particle cassettes and process thereof |
DE202007018809U1 (de) | 2007-08-31 | 2009-05-14 | Itw Gema Gmbh | Pulversprühbeschichtungsvorrichtung und Beschichtungspulver-Fördervorrichtung dafür |
DE102009040320B4 (de) * | 2009-09-05 | 2019-05-09 | Siloanlagen Achberg Holding Gmbh | Leersaugventil |
DE102013105454B4 (de) | 2013-05-28 | 2016-09-22 | Alexander Arens | Verfahren und Vorrichtung zum Dosieren von nicht fließfähigem Pulver |
CN105460619A (zh) * | 2015-12-21 | 2016-04-06 | 新疆天业(集团)有限公司 | 一种集装箱聚氯乙烯粉料卸料方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2278393A1 (fr) * | 1974-07-16 | 1976-02-13 | France Etat | Dispositif de fluidisation et de distribution de poudres |
US4007696A (en) * | 1975-10-01 | 1977-02-15 | Robertson Richard L | Solid fuel conversion furnace |
DE3168828D1 (en) * | 1980-12-02 | 1985-03-21 | Shell Int Research | Filler gun suitable for cavity injection |
DE3231594A1 (de) * | 1982-08-25 | 1984-03-01 | Anatolij Ivanovič Egoruškin | Vorrichtung zum verstaeuben eines pulverfoermigen stoffes |
EP0184994B2 (de) | 1984-09-26 | 1992-11-19 | Siegfried Frei | Pulverabsaugvorrichtung |
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 |
US4951713A (en) * | 1988-09-02 | 1990-08-28 | Jordan Foster A | Overflow check system having automatic start-up |
US5083710A (en) * | 1988-09-06 | 1992-01-28 | Oxy-Dry Corporation | Powder sprayer with automatic powder supply system |
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 |
DE4021674A1 (de) * | 1990-07-07 | 1992-01-16 | Gema Ransburg Ag | Vorrichtung zum pneumatischen foerdern von pulver aus einem behaelter |
US5271695A (en) * | 1990-07-07 | 1993-12-21 | Gema Volstatic Ag | Device for pneumatically feeding powder from a container |
US5205489A (en) * | 1990-11-29 | 1993-04-27 | Silver Engineering Works, Inc. | Adjustable eductor |
ES2080217T3 (es) * | 1990-12-21 | 1996-02-01 | American Cyanamid Co | Aparato de llenado. |
US5222529A (en) * | 1990-12-21 | 1993-06-29 | American Cyanamid Company | Filling apparatus |
AT396456B (de) * | 1991-11-19 | 1993-09-27 | Iskra Julij Ing | Vorrichtung zum entnehmen von pulverförmigen substanzen |
-
1994
- 1994-12-24 DE DE4446797A patent/DE4446797A1/de not_active Withdrawn
-
1995
- 1995-10-20 DE DE59507898T patent/DE59507898D1/de not_active Expired - Fee Related
- 1995-10-20 EP EP95116541A patent/EP0718047B1/de not_active Expired - Lifetime
- 1995-12-18 US US08/574,390 patent/US5645380A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59507898D1 (de) | 2000-04-06 |
EP0718047A2 (de) | 1996-06-26 |
EP0718047A3 (de) | 1998-12-30 |
US5645380A (en) | 1997-07-08 |
DE4446797A1 (de) | 1996-06-27 |
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