EP1201314B1 - Hochrotationszerstäuber zur Aufbringung von Pulverlack - Google Patents
Hochrotationszerstäuber zur Aufbringung von Pulverlack Download PDFInfo
- Publication number
- EP1201314B1 EP1201314B1 EP01123727A EP01123727A EP1201314B1 EP 1201314 B1 EP1201314 B1 EP 1201314B1 EP 01123727 A EP01123727 A EP 01123727A EP 01123727 A EP01123727 A EP 01123727A EP 1201314 B1 EP1201314 B1 EP 1201314B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- housing
- guidance
- speed rotary
- powder
- 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
- B05B5/0418—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces designed for spraying 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
- 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
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- 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-speed rotary atomizer for applying powder coating with a housing; With a rotatable one located at the front of the housing Bell cup; with one housed in the housing Motor that drives the bell cup; With at least one through the housing and Powder feed channel emerging at the front of the housing and with a coaxial to the bell plate Steering air device with which are under pressure Steering air in the direction of that generated by the bell cup Powder cloud is blowable.
- EP 0 857 515 A2 describes this this purpose a steering air device in the form of several bores on the front of the housing.
- the pressurized hole passes through these holes Steering air against the powder cloud and exercises the desired shaping effect.
- a disadvantage of this known steering air device is that the steering air at Passing through the different holes forming vortices, which adversely affect the powder cloud. Also, the amount of steering air that way the powder cloud can be fed, limited.
- the object of the present invention is a high-speed rotary atomizer of the type mentioned at the outset, that the steering air as evenly and flows vortex-free towards the powder cloud.
- the steering air device comprises a rotationally symmetrical air guide which is attached to the front of the housing and has a lateral surface, which the steering air can be supplied such that it along the lateral surface in the direction of the bell plate as a substantially rotationally symmetrical Air curtain flows out wherein the air guide body has an axial through hole which leads the paint powder in the direction of the bell cup.
- the steering air is not small Drilled holes but along an outer surface of a more or less massive body without the Steering air radially outwards is a physical limitation experiences.
- the steering air curtain shows no interruptions is not divided into individual partial flows, that only reunite with vortex formation could.
- the air baffle can also be proportionate move large amounts of steering air, so the effect the steering air on the powder cloud much larger than at known high-speed rotary atomizers.
- That embodiment of the is particularly preferred Invention in which a rear radial surface of the Air guiding body and a part adjacent to it limit radial gap, radially after the steering air can flow outside, the outer surface of the air guide one in the front area, after front tapered conical surface and one the rear radial surface with the truncated cone surface connecting transition area.
- this embodiment first finds the gap radially due to the flowing through, but then deflected forward Lead air instead of increasing the air flow, that ambient air from the steering air supplied from the inside gets carried away.
- the on the outer surface of the air baffle air flowing forward thus exposes itself the incoming steering air and the entrained ambient air together. This also increases the possibility of to influence the shape of the powder cloud.
- transition area is off several conical ring surfaces with different Cone angles is composed.
- one Design remains the steering air when it is deflected from the radial to the essentially axial flow direction better on the outer surface of the air baffle "stick" as if it were continuously curved.
- a particularly cheap way of communication between the annular space and the gap is a thread-like one Groove, which in an axially extending surface area cut a part delimiting the annular space is.
- Support air device can be provided with which in the flowing through the through hole of the air guide Powder stream pressurized supporting air like this can be fed that at the mouth of the through hole prevailing pressure not among those there pressure on the lateral surface drops. Let it be vortices that interfere with the formation of the powder cloud could reliably avoid.
- the high-speed rotary atomizer shown in Figure 1 has a housing 1, which is made in one piece a rear housing section 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 towards the back the high-speed atomizer; also the front housing section 1c is conical, but the cone angle larger than that of the rear housing section 1a.
- the housing 1 is made entirely of plastic.
- step 1b of housing 1 From the radially outer edge of step 1b of housing 1 runs also a conical and also made of plastic manufactured ring part 2 to the front area the outer surface of the front housing section 1c.
- the ring part 2 is on the ring shoulder 1b sealed adjacent circular edge of the housing 1, while in the inner lateral surface of its front area, which bears against the front area of the housing section 1b, for reasons that will become clear later, a groove 60 in the form a trapezoidal thread is formed.
- This groove 60 provides a connection between the annular space 3, which between the Ring part 2 and the housing 1 is located, and the front End face of the ring part 2 ago.
- An electrode insert is coaxial within the housing 1 4 arranged, the one in the axial direction relatively short, circular cylindrical rear area 4a and has a conical front region 4b.
- the front one Area 4b of the electrode insert 4 ends nearby the front end of the front housing portion 1c.
- an air-driven motor 13 is used, whose shaft 14 coaxial with the housing 1 and the electrode insert 4 runs and a through hole 15 in Electrode insert 4 passes through.
- the Hub of a bell plate 16 snapped in such a way that the bell plate 16 together with the shaft 14 twisted.
- the motor 13 is by means of a larger radius region 13a on the electrode insert 4 established. This happens because the engine area 13a between the rear face of the electrode insert 4 and a cup-shaped holding insert 17 is clamped is. This is done with screws, not shown, what through holes in the motor section 13a and in threaded holes in the electrode insert 4 are screwed in.
- connection plate 26 closed on the back of the holding insert 17 is present, various, partly in the drawing carries air connections, not shown, and also the attachment to the arm of a not shown Robot.
- the connection plate 26 is with the help a union nut 34 held on the housing 1, the a stop on a circumferential step of the housing 1 finds and on an external thread 35 of the connection plate 26 is turned up.
- connection plate 26 is pierced by two sockets 27, 28, that protrude from the inside of the connecting plate 26 and protrude into a stepped bore of the holding insert 17.
- connection sockets 27, 28 On the outside of the connection sockets 27, 28 a connection nipple 29 or 30 is attached, to which a compressed air supply hose is attached can.
- a tube 31 extends from the connector socket 27 through the stepped bore of the holding insert 17 and through a hole in the ring shoulder 1b of the Housing 1 and opens into the annular space 3, which is between the ring part 2 and the front housing section 1c located.
- Another tube 32 leads from the connection socket 28 through the corresponding stepped bore of the holding insert 17 through a further hole in the annular shoulder 1b of the Housing 1 through.
- On this tube 32 is another angled tube 33 which passes through the annular space 3 passed and in a bore 36 of the front Housing section 1c is inserted.
- the bore 36 opens into a groove in the front annular end face of the front housing section 1c.
- a ring 70 made of soft plastic, e.g. PTFE, the one with a sealing edge radially on an outer surface of the housing section 1c.
- the high-speed rotary atomizer also has two powder feed channels on that is not shown in the drawing and are arranged on the connection plate 26 Connection for the paint powder to an annular gap between the electrode insert 4 and the front housing section 1c lead. These two powder feed channels are through passed through the space lying radially outside of the motor 13.
- an air guide 37 is placed on the front end of the front housing section 1c. He has one Through hole 38 on which the hub of the bell cup 16 surrounds at a distance. Has on the front the air baffle 37 a tapered Truncated cone surface 39. The rear of the air baffle 37 comprises two connected to one another by a step radial annular surfaces 40, 41. Between the radial ring surface 40 and the end face lying further out the ring part 2 remains a narrow, radially directed Gap 42. On the radially inner ring surface 41 the air baffle 37 is the ring 70.
- the radially outer, rear annular surface 40 of the air guide 37 is over with the conical surface 39 a transition region 43 connected from each other attached cone surfaces.
- This compressed air is distributed itself in the annular space 3. It passes over the trapezoidal thread 60 in the front end region of the ring part 2 in the gap 42 between the air guide 37 and the ring part 2, flows radially outward along this gap 42 and is then through the transition region 43 of the air guide 37 deflected.
- the conical ring surfaces which is a detachment and swirling of this air flow prevent the air from settling on the conical surface 39 of the air guide 37 and flows onto the powder cloud to which is generated by the rotating bell plate 16.
- the type of flow along the air baffle 37 is so that ambient air is entrained at the same time, so that the total current running along the front area of the air guide body 37 flows, is significantly reinforced. This common flow from flowing across the gap 42 and air drawn in from the ambient air now forms the powder cloud coming from the rotating bell plate 16 is generated.
- connection nipple 30 Via the connection nipple 30, the pipes 32, 33, the bore 36 in the front housing section 1c, this air flows in the annulus between the ring 70 and the front face of the front housing section 1c. With a certain Minimum pressure lifts the sealing edge of ring 70 from that Housing section 1c and lets the air pass. In this way it reaches the foremost area of the powder feed channels and increases the pressure of the through hole 38 of the air guide body 37 flowing flow. On this prevents the pressure in the through hole 38 of the air guide 37 among those of the Steering air on the conical surface 39 drops, causing turbulence when the paint powder flow emerges from the Air guide 37 could lead. For this reason the compressed air supplied via the connection nipple 30 here also called "support air".
- the gap 42 between Air guide 37 and ring part 2 and the choice of Geometry of the air guide 37 itself can be Shape of the powder cloud generated by the high-speed rotary atomizer influence largely as desired; in particular can be very slim, a small diameter exhibiting powder clouds as they do for many Applications are desired.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Nozzles (AREA)
Description
wobei der Luftleitkörper eine axiale Durchgangsbohrung aufweist, welche das Lackpulver in Richtung zum Glockenteller führt.
- Figur 1
- einen Axialschnitt durch einen Hochrotationszerstäuber;
- Figur 2
- eine Detailvergrößerung aus Figur 1.
Claims (6)
- Hochrotationszerstäuber zur Aufbringung von Pulverlack mit einem Gehäuse (1); mit einem an der Vorderseite des Gehäuses (1) 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 und mit einer zum Glockenteller (16) koaxialen Lenklufteinrichtung, mit welcher unter Überdruck stehende Lenkluft in Richtung auf die vom Glockenteller (16) erzeugte Pulverwolke blasbar ist,
dadurch gekennzeichnet, daß
die Lenklufteinrichtung einen rotationssymmetrischen Luftleitkörper (37) umfaßt, der an der Vorderseite des Gehäuses (1) angebracht ist und eine Mantelfläche (39, 43) aufweist, welcher die Lenkluft derart zuführbar ist, daß sie entlang der Mantelfläche (39, 43) in Richtung auf den Glockenteller (16) als ein im wesentlichen rotationssymmetrischer Luftvorhang abströmt,
wobei der Luftleitkörper (37) eine axiale Durchgangsbohrung (38) aufweist, durch welche das Lackpulver in Richtung zum Glockenteller (16) strömt. - Hochrotationszerstäuber nach Anspruch 1, dadurch gekennzeichnet, daß eine hintere, radiale Fläche (40) des Luftleitkörpers (37) und ein dieser benachbartes Teil (2) einen radialen Spalt (42) begrenzen, über den Lenkluft radial nach außen strömen kann, wobei die Mantelfläche des Luftleitkörpers (37) eine im vorderen Bereich liegende, sich nach vorne konisch verjüngende Kegelstumpf-Mantelfläche (39) und einen die hintere radiale Fläche (40) mit der Kegelstumpf-Mantelfläche (39) verbindenden Übergangsbereich (43) aufweist.
- Hochrotationszerstäuber nach Anspruch 2, dadurch gekennzeichnet, daß sich der Übergangsbereich (43) aus mehreren konischen Ringflächen mit unterschiedlichen Konuswinkeln zusammensetzt.
- Hochrotationszerstäuber nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß in dem Gehäuse (1) ein Lenkluft führender Ringraum (3) vorgesehen ist, der mit dem an den Luftleitkörper (37) angrenzenden Spalt (42) kommuniziert.
- Hochrotationszerstäuber nach Anspruch 4, dadurch gekennzeichnet, daß die Kommunikation zwischen Ringraum (3) und Spalt (42) über eine gewindeähnliche Nut (60) gebildet ist, welche in einem axial verlaufenden Flächenbereich eines den Ringraum (3) begrenzenden Teils (2) eingeschnitten ist.
- Hochrotationszerstäuber nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß eine Stützlufteinrichtung (28, 30, 32, 33, 36) vorgesehen ist, mit welcher in den die Durchgangsbohrung (38) des Luftleitkörpers (37) durchfließenden Pulverstrom unter Überdruck stehende Stützluft derart zuführbar ist, daß der an der Mündungsstelle der Durchgangsbohrung (38) herrschende Druck nicht unter den dort an der Mantelfläche (39) herrschenden Druck abfällt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10053296A DE10053296C2 (de) | 2000-10-27 | 2000-10-27 | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
DE10053296 | 2000-10-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1201314A2 EP1201314A2 (de) | 2002-05-02 |
EP1201314A3 EP1201314A3 (de) | 2003-01-29 |
EP1201314B1 true EP1201314B1 (de) | 2004-12-22 |
Family
ID=7661260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01123727A Expired - Lifetime EP1201314B1 (de) | 2000-10-27 | 2001-10-04 | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
Country Status (3)
Country | Link |
---|---|
US (1) | US6817555B2 (de) |
EP (1) | EP1201314B1 (de) |
DE (2) | DE10053296C2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102510775A (zh) * | 2009-09-24 | 2012-06-20 | 杜尔系统有限责任公司 | 旋转喷雾器和用于控制其喷淋体的方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE527892C2 (sv) * | 2004-05-18 | 2006-07-04 | Lind Finance & Dev Ab | Formande luftström |
DE102005044154B4 (de) | 2005-09-15 | 2007-09-27 | Dürr Systems GmbH | Rotationszerstäuberbauteil |
US20080011333A1 (en) * | 2006-07-13 | 2008-01-17 | Rodgers Michael C | Cleaning coating dispensers |
US7735748B1 (en) * | 2006-10-10 | 2010-06-15 | Ingo Werner Scheer | Spray nozzle with improved tip and method of manufacture |
JP4785802B2 (ja) * | 2007-07-31 | 2011-10-05 | 株式会社日清製粉グループ本社 | 粉体分級装置 |
CN103337928B (zh) * | 2013-06-19 | 2015-11-25 | 天来节能科技(上海)有限公司 | 一种相变冷却节能电机 |
CN114700194A (zh) * | 2022-05-07 | 2022-07-05 | 安徽哈工道一智能制造技术有限公司 | 一种新型国产化喷涂高速旋杯 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3964683A (en) * | 1975-09-02 | 1976-06-22 | Champion Spark Plug Company | Electrostatic spray apparatus |
DE3114314A1 (de) | 1981-04-09 | 1982-10-28 | Hoechst Ag, 6000 Frankfurt | "verfahren zur herstellung von substituierten 3-hydroxy-1,2,4-triazolen" |
DE3214314A1 (de) * | 1982-04-19 | 1983-10-20 | J. Wagner AG, 9450 Altstätten | Elektrostatische spruehvorrichtung |
DE3718154A1 (de) * | 1987-05-29 | 1988-12-08 | Gema Ransburg Ag | Sprueheinheit mit einem rotationsspruehorgan |
US4927081A (en) * | 1988-09-23 | 1990-05-22 | Graco Inc. | Rotary atomizer |
FR2652518B1 (fr) * | 1989-10-03 | 1994-04-08 | Sames Sa | Dispositif de projection de produit de revetement a organe rotatif de pulverisation. |
DE19506968A1 (de) * | 1995-02-13 | 1996-08-14 | Ind Lackieranlagen Schmidt Gmb | Hochrotationszerstäuber |
US5697559A (en) * | 1995-03-15 | 1997-12-16 | Nordson Corporation | Electrostatic rotary atomizing spray device |
US5862988A (en) * | 1996-05-15 | 1999-01-26 | Van Der Steur; Gunnar | Coating apparatus and shroud thereof |
EP0864367B1 (de) * | 1996-10-01 | 2002-11-27 | Abb K.K. | Rotationszerstäubungskopf |
EP0857515A3 (de) * | 1997-02-05 | 1998-09-16 | Illinois Tool Works Inc. | Abluftstrom einer Turbine einer Pulverbeschichtungsvorrichtung |
-
2000
- 2000-10-27 DE DE10053296A patent/DE10053296C2/de not_active Expired - Fee Related
-
2001
- 2001-10-04 EP EP01123727A patent/EP1201314B1/de not_active Expired - Lifetime
- 2001-10-04 DE DE50104872T patent/DE50104872D1/de not_active Expired - Lifetime
- 2001-10-24 US US09/999,773 patent/US6817555B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102510775A (zh) * | 2009-09-24 | 2012-06-20 | 杜尔系统有限责任公司 | 旋转喷雾器和用于控制其喷淋体的方法 |
CN102510775B (zh) * | 2009-09-24 | 2015-08-26 | 杜尔系统有限责任公司 | 旋转喷雾器和用于控制其喷淋体的方法 |
Also Published As
Publication number | Publication date |
---|---|
US6817555B2 (en) | 2004-11-16 |
DE50104872D1 (de) | 2005-01-27 |
US20020088394A1 (en) | 2002-07-11 |
EP1201314A3 (de) | 2003-01-29 |
DE10053296A1 (de) | 2002-05-16 |
DE10053296C2 (de) | 2003-12-18 |
EP1201314A2 (de) | 2002-05-02 |
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