EP1201316B1 - Hochrotationszerstäuber zur Aufbringung von Pulverlack - Google Patents
Hochrotationszerstäuber zur Aufbringung von Pulverlack Download PDFInfo
- Publication number
- EP1201316B1 EP1201316B1 EP01123729A EP01123729A EP1201316B1 EP 1201316 B1 EP1201316 B1 EP 1201316B1 EP 01123729 A EP01123729 A EP 01123729A EP 01123729 A EP01123729 A EP 01123729A EP 1201316 B1 EP1201316 B1 EP 1201316B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- acceleration
- speed rotary
- jet
- passage
- 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
- 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
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
-
- 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
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Definitions
- the invention relates to a high-rotation atomizer for applying powder coating to a housing; With a arranged on the front of the housing rotatable Bell cup; with a housed in the housing Engine that drives the bell-plate; With at least one extending through the housing and at the front of the housing exiting Pulverzu Glasskanal and at least one arranged in the housing High voltage electrode, at which the powder feed channel flowing through powder particles for ionization be passed.
- the object of the present invention is to provide a high-rotation atomizer of the type mentioned in a simple Way in such a way that even when using electric conductive particles in the powder coating no setback threatened by the high voltage electrode.
- the powder supply channel contains an acceleration nozzle, in which the paint powder particles to a higher speed be accelerated, at least over a certain distance is maintained.
- the Paint powder particles carry current in a given Range of the powder feed channel to such a high speed is accelerated, that is there anyway no particles on the walls of the powder feed channel especially no electrically conductive particles, precipitate can.
- the high speed and so the cleanliness of the walls of the Pulverzu Switzerlandkanales must over maintain such a distance that at the used high voltages over this distance no Setback is possible.
- Im further downstream from the Accelerating nozzle lying area of the powder feed channel can then the flow of Lackpulverteilchen slow down again. If there on the surfaces the powder feed channel again a layer of Lackpulverteilchen this is harmless.
- the accelerating nozzle has an inlet, over which pressurized acceleration air in the passage opening of the acceleration nozzle is insertable.
- This additional acceleration air has two effects: First, it supports the acceleration the powder particle stream; on the other hand it creates a suitable aerodynamic leadership Air layer between the wall of the powder feed channel and the further radially inner paint powder flow. This also contributes to the Lackpulverteilchen of keep away from the wall of the powder feed channel.
- the acceleration nozzle wherein the inlet a Ring groove in the lateral surface, an annular groove in the inlet side End face and at least one of the annular grooves connecting axial bore in the nozzle body of the acceleration nozzle having.
- the acceleration air flows during this process from the end-side annular groove along the end face the nozzle body in the through hole. hereby becomes a uniform inflow of the acceleration air over the entire circumference of the through hole of the Ensured accelerating nozzle away.
- the inlet for the acceleration air can be a to the inlet side of the passage opening of the acceleration nozzle leading, narrow, radial gap include. This gap is going through on one side the nozzle body of the acceleration nozzle and on the the other side by a second, adjacent component limited. If necessary, it is easily accessible for cleaning.
- the Hochrotationszerstäuber shown in Figure 1 has a housing 1, which integrally from a rear housing portion 1a, a radially extending Ring shoulder 1b and a front housing section 1c composed.
- the rear housing section 1a expands with a small cone angle in the direction of the back of the high rotation atomizer; also the front housing section 1c is conical, the cone angle but larger than that of the rear housing section 1a is.
- the housing 1 is complete made of plastic.
- an electrode insert 4 Coaxially within the housing 1 is an electrode insert 4 arranged, the one in the axial direction relatively short, circular cylindrical rear area 4a and a conical front portion 4b.
- the front portion 4b of the electrode insert 4 ends near the front end of the front housing section 1c.
- a radially extending flange 4c formed, parallel to the annular shoulder 1b of the housing 1, on the inside fitting, extends.
- the ring flange 4c is formed by two recesses continuing the channels 9, 10 11, 12 interspersed.
- an air-driven engine 13 is used, its shaft 14 coaxial with the housing 1 and the electrode insert 4 extends and a through hole 15 in Electrode insert 4 interspersed.
- the hub of a bell cup 16 is engaged, so that the bell cup 16 together with the shaft 14 twisted.
- the motor 13 is by means of a larger radius having region 13a on the electrode insert 4 set. This happens because the engine area 13a between the rear end side of the electrode insert 4 and a pot-shaped holding insert 17th is trapped.
- the holding insert 17 stepped holes 18, passed through which screws 19 are. These screws 19 pass through holes 20 in the motor section 13a and are in threaded holes 21 of the electrode insert 4 screwed.
- a radially projecting flange 17a of the holding insert 17 By a radially projecting flange 17a of the holding insert 17 are two sockets 22, 23 passed. At the sockets 22, 23 is in each case the rear end of a connecting hose 24, 25, attached to the front end connected to a beryllium sleeve 40 (Figure 1), which the through hole 11 and 12 in the flange portion 4c of the electrode insert 4 and the channels 9, 10 interspersed and rests against the inner surfaces. These seals the powder flow paths. Alternatively, you can this sleeve 40 also omitted, as shown in Figure 2 is.
- connection plate 26 closed at the back of the Holding insert 17 is applied, the various in the Drawing not shown air connections wearing and also the attachment to the arm of one also not represented robot serves.
- Coaxial to the sockets 22, 23 in the holding insert 17 extend through the Terminal plate 26 two accelerating nozzle inserts 27, 28. Their exact function will be explained below; their passage openings 29 and 30 are aligned in each case with the passage opening of the adjacent connection socket 22 and 23 respectively.
- connection nipple 31, 32 On the rear face of the accelerator nozzle inserts 27, 28 is, again in alignment, respectively a connection nipple 31, 32 attached, which of the compound with a flexible hose over which the Powder is supplied from a storage container.
- connecting nipple 31 and 32 and accelerating nozzle inserts 27, 28 are with screws 33 on the terminal plate 26 attached that after loosening the screws 33 first the connection nipple 31, 32 removed and then the Accelerator nozzle inserts 27, 28 from the port plate 26 can be taken out.
- connection plate 26 is by means of a union nut 34 held on the housing 1, which at a peripheral level of the housing 1 finds a stop and on an external thread 35 of the connection plate 26 is turned on.
- an air guide body 36 attached, in the present context is not of interest. He has a through hole 27 on which the hub of the bell cup 16 with Distance surrounds.
- the accelerator nozzle insert 27 and the associated Connecting nipple 31 are in Figure 3 on a larger scale and are described in more detail below.
- the second accelerator nozzle insert 28 and its connection nipple 32 are formed in an identical manner.
- the accelerating nozzle insert 27 has a nozzle body 50, in which the above-mentioned passage opening 29 is formed.
- the passage opening 29 has in the axial section shown in Figure 3 a Shape similar to a Lavalle or Venturi nozzle is. That is, the passage opening 29 tapers initially from their higher pressure, the Connection nipple 31 adjacent inlet side up to a narrowest point and extends from there conical over a longer distance to the Exit side, which is located on the left in Figure 3.
- the Rejuvenation of the passage opening 29 via a Transition region 60, seen in axial section polygonal composed of individual conical annular surfaces 61 are, each with different cone angles and at the narrowest point in a circular cylindrical surface 62 pass over.
- the nozzle body 50 of the accelerator nozzle insert 27 has an annular groove 51 in its lateral surface, with a guided through the terminal plate 26, in the drawing, not shown Zu Industriesbohrung for communicates with pressurized acceleration air. From the annular groove 51 lead axial bores 52 to a second annular groove 53, in the nipple the 31st incorporated adjacent end face of the nozzle body 50 is. Between the nipple 31 and the beginning of the Through opening 29 of the nozzle body 50 remains thin gap 54.
- the through hole 55 of the connecting nipple 31 expands in the vicinity of the nozzle body 50 to the diameter, the passage opening 29 of the nozzle body 50 on the entrance side has.
- connection nipple 31, 32 electrically conductive particles containing paint powder enters the passage openings 29, 30 of the accelerator nozzle inserts 27, 28 and is already due to the narrowing the flow cross-section to a higher speed accelerated.
- This effect is reinforced by that via the groove 51, the axial bores 52, the groove 53 of the nozzle body 50 and the gap 54 between the Nozzle body 50 and the connection nipple 31 acceleration air mixed under pressure.
- This acceleration air enters via the gap 54 initially in the radial direction, However, it is then conical along the out of the several Ring surfaces 61 composite transition region 60 in Redirected axial direction and then flows preferably along the wall of the passage opening 29 on.
Description
- Figur 1:
- einen Axialschnitt durch einen Hochrotationszerstäuber;
- Figur 2:
- einen Schnitt durch den Hochrotationszerstäuber von Figur 1 gemäß der dortigen Linie II-II;
- Figur 3:
- einen Axialschnitt durch eine Bescheungungsdüse und einen Anschlußnippel des Hochrotationszerstäubers von Figuren 1 und 2 in vergrößertem Maßstab.
Claims (7)
- Hochrotationszerstäuber zur Aufbringung von Pulverlack mit einem Gehäuse (1); mit einem an der Vorderseite des Gehäuses angeordneten drehbaren Glockenteller (16); mit einem in dem Gehäuse (1) untergebrachten Motor (13), der den Glockenteller (16) antreibt; mit mindestens einem durch das Gehäuse (1) verlaufenden und an der Vorderseite des Gehäuses (1) austretenden Pulverzuführkanal (9, 10) und mit mindestens einer im Gehäuse (1) angeordneten Hochspannungselektrode (4), an welcher die den Pulverzuführkanal (9, 10) durchströmenden Lackpulverteilchen zur Ionisation vorbeigeführt werden,
dadurch gekennzeichnet, daß
der Pulverzuführkanal (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) eine Beschleunigungsdüse (27, 28) enthält, in welcher die Lackpulverteilchen auf eine höhere Geschwindigkeit beschleunigt werden, die zumindest über eine gewisse Wegstrecke hinweg aufrechterhalten bleibt. - Hochrotationszerstäuber nach Anspruch 1, dadurch gekennzeichnet, daß die Beschleunigungsdüse (27, 28) einen Einlaß (51, 52, 53, 54) aufweist, über welchen unter Überdruck stehende Beschleunigungsluft in die Durchgangsöffnung (29, 30) der Beschleunigungsdüse (27, 28) einführbar ist.
- Hochrotationszerstäuber nach Anspruch 2, dadurch gekennzeichnet, daß der Einlaß eine Ringnut (51) in der Mantelfläche, eine Ringnut (53) in der einlaßseitigen Stirnfläche und mindestens eine die Ringnut (51, 53) verbindende Axialabohrung (52) im Düsenkörper (50) der Beschleunigungsdüse (27, 28) umfaßt.
- Hochrotationszerstäuber nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß der Einlaß für die Beschleunigungsluft einen zur Einlaßseite der Durchgangsöffnung (29, 30) der Beschleunigungsdüse (27, 28) führenden schmalen, radial verlaufenden Spalt (54) umfaßt.
- Hochrotationszerstäuber nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Durchgangsöffnung (29, 30) der Beschleunigungsdüse (27, 28) sich in Durchströmungsrichtung zunächst bis zu einer engsten Stelle verjüngt und sodann wieder erweitert.
- Hochrotationszerstäuber nach Anspruch 5, dadurch gekennzeichnet, daß die Durchgangsöffnung (29, 30) der Beschleunigungsdüse (27, 28) einen Übergangsbereich von der Einlaßseite zur engsten Stelle aufweist, der von mehreren aneinandergesetzten konischen Ringflächen mit unterschiedlichen Konuswinkeln gebildet ist.
- Hochrotationszerstäuber nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß sich die Durchgangsöffnung (29, 30) der Beschleunigungsdüse 27, 28) hinter der engsten Stelle in Strömungsrichtung konisch erweitert.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10053295A DE10053295C2 (de) | 2000-10-27 | 2000-10-27 | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
DE10053295 | 2000-10-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1201316A1 EP1201316A1 (de) | 2002-05-02 |
EP1201316B1 true EP1201316B1 (de) | 2005-07-20 |
Family
ID=7661259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01123729A Expired - Lifetime EP1201316B1 (de) | 2000-10-27 | 2001-10-04 | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
Country Status (4)
Country | Link |
---|---|
US (1) | US6722591B2 (de) |
EP (1) | EP1201316B1 (de) |
AT (1) | ATE299756T1 (de) |
DE (2) | DE10053295C2 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10236017B3 (de) | 2002-08-06 | 2004-05-27 | Dürr Systems GmbH | Rotationszerstäuberturbine und Rotationszerstäuber |
DE10324074B4 (de) * | 2003-05-27 | 2006-01-26 | Dürr Systems GmbH | Glockenteller für einen Rotationszerstäuber |
DE10349715B4 (de) | 2003-10-23 | 2006-05-04 | Eisenmann Maschinenbau Gmbh & Co. Kg | Pulverquelle für eine Pulverbeschichtungsanlage |
US20080011333A1 (en) * | 2006-07-13 | 2008-01-17 | Rodgers Michael C | Cleaning coating dispensers |
JP4347372B2 (ja) * | 2007-08-10 | 2009-10-21 | トヨタ自動車株式会社 | 静電塗装装置 |
US20100145516A1 (en) * | 2008-12-08 | 2010-06-10 | Illinois Tool Works Inc. | High voltage monitoring system and method for spray coating systems |
DE102010027391A1 (de) | 2010-07-16 | 2011-08-25 | Eisenmann Ag, 71032 | Rotationszerstäuber zum elektrostatisch unterstützten Aufbringen von Lackpartikeln |
DE102012005261A1 (de) * | 2012-03-15 | 2013-09-19 | Eisenmann Ag | Rotationszerstäuber und Verfahren zum Aufbringen eines Beschichtungsmaterials auf einen Gegenstand |
DE102015016448A1 (de) * | 2015-12-21 | 2017-06-22 | Eisenmann Se | Beschichtungsvorrichtung zum elektrostatisch geführten Aufbringen von Beschichtungsmaterial |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4258409A (en) * | 1979-03-08 | 1981-03-24 | Estey Dynamics Corporation | Electrogasdynamic coating apparatus |
US4228961A (en) * | 1979-05-07 | 1980-10-21 | Onoda Cement Co., Ltd. | Electrostatic power painting head |
US4545536A (en) * | 1983-05-13 | 1985-10-08 | Yakov Avidon | Apparatus for electrostatic paint spraying |
DE9315890U1 (de) * | 1993-10-19 | 1994-03-31 | Hestermann Gerhard | Pulversprühorgan |
US5711489A (en) * | 1994-08-18 | 1998-01-27 | Nihon Parkerizing Co., Ltd. | Electrostatic powder coating method and apparatus |
DE19537089A1 (de) * | 1995-10-05 | 1997-04-10 | Abb Research Ltd | Verfahren und Einrichtung zum Pulversprühen |
JPH1015440A (ja) * | 1996-07-08 | 1998-01-20 | Ransburg Ind Kk | 静電塗装機 |
DE19701995A1 (de) * | 1997-01-22 | 1998-07-23 | Gerhard Hestermann | Sprühorgan für Pulverbeschichtung |
EP0857515A3 (de) * | 1997-02-05 | 1998-09-16 | Illinois Tool Works Inc. | Abluftstrom einer Turbine einer Pulverbeschichtungsvorrichtung |
US5947377A (en) * | 1997-07-11 | 1999-09-07 | Nordson Corporation | Electrostatic rotary atomizing spray device with improved atomizer cup |
-
2000
- 2000-10-27 DE DE10053295A patent/DE10053295C2/de not_active Expired - Fee Related
-
2001
- 2001-10-04 DE DE50106769T patent/DE50106769D1/de not_active Expired - Lifetime
- 2001-10-04 EP EP01123729A patent/EP1201316B1/de not_active Expired - Lifetime
- 2001-10-04 AT AT01123729T patent/ATE299756T1/de not_active IP Right Cessation
- 2001-10-24 US US09/999,771 patent/US6722591B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6722591B2 (en) | 2004-04-20 |
DE10053295A1 (de) | 2002-05-16 |
EP1201316A1 (de) | 2002-05-02 |
US20020083893A1 (en) | 2002-07-04 |
DE10053295C2 (de) | 2002-10-31 |
DE50106769D1 (de) | 2005-08-25 |
ATE299756T1 (de) | 2005-08-15 |
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