EP1242190A1 - Hochrotationszerstäuber zur aufbringung von pulverlack - Google Patents
Hochrotationszerstäuber zur aufbringung von pulverlackInfo
- Publication number
- EP1242190A1 EP1242190A1 EP01988628A EP01988628A EP1242190A1 EP 1242190 A1 EP1242190 A1 EP 1242190A1 EP 01988628 A EP01988628 A EP 01988628A EP 01988628 A EP01988628 A EP 01988628A EP 1242190 A1 EP1242190 A1 EP 1242190A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- powder
- motor
- insert
- section
- 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.)
- Granted
Links
- 239000000843 powder Substances 0.000 title abstract description 47
- 239000003973 paint Substances 0.000 title abstract description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B05B5/0415—Driving means; Parts thereof, e.g. turbine, shaft, bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1057—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces with at least two outlets, other than gas and cleaning fluid outlets, for discharging, selectively or not, different or identical liquids or other fluent materials on the rotating element
-
- 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 bell plate arranged on the north side of the housing; with a motor housed in the housing, which drives the bell-shaped plate, and with at least one powder feed channel running through the housing and emerging from the front of the housing.
- the powder feed channel is guided through the hollow shaft of the motor and opens at the front very close to the axis of the bell cup.
- This is associated with two disadvantages: firstly, the cross section of the powder feed channel can only be relatively small, which limits the powder throughput and thus the painting performance of the high-speed rotary atomizer.
- the paint powder is brought very close to the axis into the area of action of the high-speed rotary atomizer, where its speed is relatively low. This worsens the efficiency of the swirl achieved by the bell cup.
- the object of the present invention is to provide a high-speed rotary atomizer of the type mentioned at the outset, which has a considerably higher painting capacity.
- the powder feed channel can be formed in at least one section at the interface between two parts. This has the advantage that the inner surface of this area of the powder feed channel is immediately accessible and can be cleaned when the two parts are removed.
- the two parts mentioned are the housing on the one hand and a housing insert on the other.
- the housing insert which partially delimits the powder feed channel, is connected as a high-voltage electrode.
- the paint powder is thus brought into contact with a surface which carries high voltage over a considerable distance through the housing. This gives a very good ionization effect.
- the housing and at least one housing insert can be conical in the front area and rest against one another with conical surfaces. This mechanical structure facilitates the assembly and disassembly of the high-speed rotary atomizer, since the housing and housing insert can be fixed in one direction by plugging the conical areas into one another and only require a fastening device at the opposite end.
- the conical surfaces of the housing and the housing insert are preferably self-sealing and / or self-locking. This also makes assembly easier; special sealants are not necessary.
- the shaft of the motor that plate of the motor drives, air-bearing.
- an air bearing bush is provided in which the motor shaft is guided. Bearing air is pressed radially inwards through small channels in the air bearing bush and thus forms an air cushion between the inner surface of the air bearing bush and the outer surface of the shaft. If such an air bearing is used in the present invention, it is particularly advantageous if the shaft of the motor is hollow and has radial bores through which the bearing air can get into the interior of the shaft, and if the interior of the shaft has a through hole in the bell cup communicates, which opens into the front of the bell plate.
- the shaft is no longer required for powder supply; it can now be used for another purpose, namely for supplying cleaning air to the bell plate, with which buildup can be blown off there.
- the internal clearance is used for a second purpose: Because it enters the hollow shaft of the motor and can be supplied to the bell cup via it, it does not come out unused as before, but also takes on the cleaning function.
- Figure 1 an axial section through a high-speed atomizer
- Figure 2 shows a section through the high-speed rotary atomizer of Figure 1 along the line II-II there.
- the high-speed rotary atomizer shown in Figure 1 has a housing 1, which is made in one piece from a rear housing section la, a radially extending annular shoulder 1b and a front housing section lc.
- the rear housing section la widens with a small cone angle towards the rear of the high-speed atomizer; the front housing section 1c is also conical, but the cone angle is greater than that of the rear housing section la.
- the housing 1 is made entirely of plastic.
- a likewise conical ring part 2 also made of plastic, runs to the front area of the outer lateral surface of the front housing section 1c.
- the ring part 2 is sealed against the housing 1 at both circular edges, so that it encloses an annular space 3 with the housing 1. In a manner of no interest here, this serves to carry out steering air with which the shape of the powder cloud generated can be influenced.
- an electrode insert 4 Arranged coaxially within the housing 1 is an electrode insert 4 which has a circular cylindrical rear region 4a which is relatively short in the axial direction and a conical front region 4b.
- the front area 4b of the electrode insert 4 ends in the vicinity of the front end of the front housing section 1c.
- FIG. 2 shows, two mirror-symmetrical recesses 50, 51 are arranged on the inner circumferential surface of the front housing section 1c, which extend from the rear of the step 1b to the front end of the front housing section 1c and thereby approximately from one circular cross-sectional shape into the cross-sectional shape of arcuate column.
- the conical inner lateral surface of the front housing section 1c as FIG. 2 clearly shows, abuts the conical lateral surface of the front section 4b of the electrode insert 4 via two webs 7, 8.
- the front section 4b of the electrode insert 4 and the front housing section 1c form two channels 9 and 10. These channels 9, 10 are inclined with respect to the common axis of the housing 1 and the electrode insert 4 in such a way that they point towards the front end of the high-speed atomizer converge.
- a radially extending flange 4c is formed on the electrode insert 4, which flange extends parallel to the annular shoulder 1b of the housing 1, lying on the inside thereof.
- the annular flange 4c is penetrated by two recesses 11, 12 which continue the channels 9, 10.
- An air-driven motor 13 is inserted into the suitably stepped interior of the electrode insert 4, the shaft 14 of which runs coaxially with the housing 1 and the electrode insert 4 and penetrates a through hole 15 in the electrode insert 4.
- the hub of a bell plate 16 is locked onto the shaft 14 in such a way that the bell plate 16 rotates together with the shaft 14.
- the motor 13 is fixed to the electrode insert 4 by means of a region 13a having a larger radius. This is done in that the motor area 13a between the rear end face of the electrode insert 4 and a cup-shaped holding insert 17 is jammed.
- the holding insert 17 has stepped bores 18 through which screws 19 are passed. These screws 19 pass through bores 20 in the motor section 13a and are screwed into threaded bores 21 of the electrode insert 4.
- connection sockets 22, 23 are passed through a radially projecting flange region 17a of the holding insert 17.
- this sleeve 40 can also be omitted, as shown in FIG. 2.
- connection plate 26 which bears against the rear of the holding insert 17, which carries various air connections, not shown in the drawing, and also serves for fastening to the arm of a robot, also not shown.
- connection sockets 22, 23 in the holding insert 17 Coaxial to the connection sockets 22, 23 in the holding insert 17, two acceleration nozzle inserts 27, 28 run through the connection plate 26. Their exact function is of no interest in the present context; their through openings 29 and 30 are aligned with the through opening of the adjacent connection socket 22 and 23, respectively.
- connection nipple 31, 32 On the rear end of the accelerator nozzle inserts 27, 28, once again in alignment, a connection nipple 31, 32 is placed, which serves to connect with a flexible hose, via which the Powder is fed from a storage container. Connecting nipples 31 and 32 and accelerator nozzle inserts 27, 28 are fastened to the connecting plate 26 with screws 33 in such a way that after loosening the screws 33, the connecting nipples 31, 32 are removed and then the
- Accelerator nozzle inserts 27, 28 can be removed from the connection plate 26.
- connection plate 26 is held on the housing 1 by means of a union nut 34, which finds a stop on a circumferential step of the housing 1 and is screwed onto an external thread 35 of the connection plate 26.
- the high-speed rotary atomizer can be installed in the following way:
- the motor 13 is inserted into the interior of the electrode insert 4 and secured there with the aid of the holding insert 17.
- the connection sockets 22, 23 inserted into the flange region 17c of the holding part 17 are connected via the hoses 24, 25 to the through bores 11, 12 in the flange section 4c of the electrode insert 4.
- the unit thus formed is pushed into the housing 1 until the conical outer surface of the section 4b abuts the likewise conical webs 7, 8 of the inner outer surface of the housing 1.
- the cone angle can be chosen so that there is a kind of self-locking and sealing effect in the manner of "Morse cones".
- the connecting plate 26 is placed on the rear end of the retaining projection 17, closing the housing 1, as shown in FIG. 1, and fastened in this position with the aid of the union nut 34.
- the disassembly of the high-speed rotary atomizer is carried out in the opposite way.
- the surfaces that delimit the channels 9 and 10 can be exposed for cleaning in a very simple manner.
- An air guide body 36 is placed on the front end of the housing 1 and is not of interest in the present context. It has a through-hole 37 which surrounds the hub of the bell cup 16 at a distance.
- the shaft 14 of the air-driven motor 13 is hollow. It is mounted in a bearing bush 38 which has a large number of very fine, radially directed through bores 41.
- the hollow shaft 14 is also provided with a plurality of radial bores 39. Its rear end, ie the right end in FIG. 1, is closed by a closure body 39. Its front end, as the left end in FIG. 1, on the other hand, communicates with a through hole 40 in the bell cup 16, which opens into the front end face thereof.
- Compressed air is applied to the radially outer side of the bearing bush 38. This compressed air penetrates the small radial through bores 41 of the bearing bush 38 and initially ensures a stored air cushion between the bearing bush 38 and the motor shaft 14. The bearing air then passes through the radial bores 39 of the motor shaft 14 and becomes the front in the interior thereof
- the lacquer powder supplied via the connecting nipples 31, 32 is first accelerated in the accelerator nozzle inserts 27, 28 for reasons of no further interest here, and then via the hoses 24, 25 into the sleeves 40 penetrating the through bores 11, 12 and the channels 9, 10 brought in.
- the paint powder spreads along metallic surfaces that are electrically connected to the electrode insert 4 and is directly ionized.
- the high-speed rotary atomizer described thus has two powder feed channels, each through an accelerator nozzle insert 27, 28, a hose 24, 25, a through hole 11, 12 in the flange 4c of the electrode insert 4 and a channel 9, 10 between the housing 1 and the electrode insert 4 penetrating sleeve 40 are formed.
- the off-center guidance of the powder feed channels enables high flow cross-sections, so that high powder outputs can be achieved.
- the powder can be guided past large electrode areas so that good ionization can be achieved. claims
- high-speed atomizer for applying powder coating with a housing; with a rotatable bell plate arranged on the front of the housing; with a motor housed in the housing, which drives the bell cup, and with at least one powder feed channel running through the housing and emerging from the front of the housing,
- High-speed rotary atomizer characterized in that a plurality of powder feed channels (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) are arranged radially outside the motor (13) in a corresponding multi-fold rotational symmetry.
- High-speed rotary atomizer characterized in that the powder feed channel (28, 29, 22, 23, 24, 25, 11, 12, 9, 10) at least in a first section (9, 10) at the interface between two parts (1, 4) is formed.
- High-speed rotary atomizer according to claim 4 in which a high-voltage electrode is provided for the internal charging of the paint powder in the housing, characterized in that the housing insert (4) consists of metal and is connected as a high-voltage electrode.
- (1) and at least one housing insert (4) in the front area (1c, 4b) are conical and rest against one another with conical surfaces.
- High-speed rotary atomizer according to claim 6 characterized in that the conical surfaces of the housing (1) and the housing insert (4) are designed to be self-sealing and / or self-locking.
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Nozzles (AREA)
Abstract
Description
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10053292A DE10053292C1 (de) | 2000-10-27 | 2000-10-27 | Hochrotationszerstäuber zur Aufbringung von Pulverlack |
DE10053292 | 2000-10-27 | ||
PCT/EP2001/011362 WO2002034410A1 (de) | 2000-10-27 | 2001-10-02 | Hochrotationszerstäuber zur aufbringung von pulverlack |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1242190A1 true EP1242190A1 (de) | 2002-09-25 |
EP1242190B1 EP1242190B1 (de) | 2007-11-21 |
Family
ID=7661257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01988628A Expired - Lifetime EP1242190B1 (de) | 2000-10-27 | 2001-10-02 | Hochrotationszerstäuber zur aufbringung von pulverlack |
Country Status (6)
Country | Link |
---|---|
US (1) | US6672521B2 (de) |
EP (1) | EP1242190B1 (de) |
CZ (1) | CZ301128B6 (de) |
DE (2) | DE10053292C1 (de) |
PL (1) | PL198164B1 (de) |
WO (1) | WO2002034410A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7070130B1 (en) * | 2002-11-06 | 2006-07-04 | E. I. Dupont De Nemours And Company | Rotatable electrode ring and use thereof in electrostatically assisted high-speed rotary application of spray coating agents |
US7762481B2 (en) * | 2003-11-06 | 2010-07-27 | Fanuc Robotics America, Inc. | Electrostatic rotary atomizer with indirect internal charge |
US20060068094A1 (en) * | 2004-09-29 | 2006-03-30 | Cole David J | Production paint shop design |
US20080011333A1 (en) * | 2006-07-13 | 2008-01-17 | Rodgers Michael C | Cleaning coating dispensers |
WO2008075798A1 (en) * | 2006-12-18 | 2008-06-26 | Nokwon Engineering & Construction Co., Ltd. | A rotary atomizer, and air bearing protection system for rotary atomizer |
DE102013022282B3 (de) | 2013-12-03 | 2015-03-05 | Eisenmann Ag | Mit Innenaufladung arbeitender Hochrotationszerstäuber |
US8973848B2 (en) * | 2014-09-08 | 2015-03-10 | Efc Systems, Inc. | Composite air bearing assembly |
US9375734B1 (en) * | 2015-06-16 | 2016-06-28 | Efc Systems, Inc. | Coating apparatus turbine having internally routed shaping air |
US9970481B1 (en) | 2017-09-29 | 2018-05-15 | Efc Systems, Inc. | Rotary coating atomizer having vibration damping air bearings |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL125216C (de) * | 1962-11-15 | |||
DE1652390B2 (de) * | 1967-05-17 | 1977-03-17 | Ernst Mueller, Luft- u. Farbspritztechnik, 7057 Winnenden | Vorrichtung zum elektrostatischen ueberziehen von gegenstaenden mit fluessigem oder pulverfoermigem ueberzugsmaterial |
US3826425A (en) * | 1972-06-21 | 1974-07-30 | Ransburg Corp | Electrostatic apparatus |
FR2441435A1 (fr) * | 1978-11-14 | 1980-06-13 | Gema Ag | Procede et dispositif de projection, notamment pour le revetement d'objets avec de la poudre |
DE3000002C2 (de) * | 1980-01-02 | 1985-07-25 | Ernst Mueller Gmbh & Co, 7057 Winnenden | Elektrostatische Farbspritzpistole mit Rotationszertäuber |
US4499118A (en) * | 1982-02-03 | 1985-02-12 | General Electric Company | Method for coating with an atomizable material |
DE3608426C3 (de) * | 1986-03-13 | 1994-11-24 | Gema Volstatic Ag | Elektrostatische Sprüheinrichtung für Beschichtungspulver |
ES2019888B3 (es) * | 1986-03-13 | 1991-07-16 | Ransburg-Gema Ag | Pulverizadora electrostatica para polvos de revestimiento. |
DE3718154A1 (de) * | 1987-05-29 | 1988-12-08 | Gema Ransburg Ag | Sprueheinheit mit einem rotationsspruehorgan |
DE4005350A1 (de) * | 1990-02-20 | 1991-08-22 | Wagner Int | Duesenvorsatz fuer pulverspruehpistolen |
EP0627265B1 (de) * | 1993-06-02 | 1998-01-21 | Matsuo Sangyo Co., Ltd. | Triboelektrische Spritzpistole |
AU6022996A (en) * | 1995-05-19 | 1996-11-29 | Nordson Corporation | Powder spray gun with rotary distributor |
JP2000508232A (ja) * | 1996-04-04 | 2000-07-04 | ノードソン コーポレーション | 円錐形スプレを使用する摩擦電気粉体スプレ塗装 |
EP0857515A3 (de) * | 1997-02-05 | 1998-09-16 | Illinois Tool Works Inc. | Abluftstrom einer Turbine einer Pulverbeschichtungsvorrichtung |
DE19721615A1 (de) * | 1997-05-23 | 1998-12-10 | R D T Advanced Painting Techno | Vorrichtung mit mindestens einem rotierbar gelagerten Hohlkörper |
-
2000
- 2000-10-27 DE DE10053292A patent/DE10053292C1/de not_active Expired - Fee Related
-
2001
- 2001-10-02 US US10/168,835 patent/US6672521B2/en not_active Expired - Fee Related
- 2001-10-02 EP EP01988628A patent/EP1242190B1/de not_active Expired - Lifetime
- 2001-10-02 DE DE50113290T patent/DE50113290D1/de not_active Expired - Lifetime
- 2001-10-02 CZ CZ20022225A patent/CZ301128B6/cs not_active IP Right Cessation
- 2001-10-02 WO PCT/EP2001/011362 patent/WO2002034410A1/de active IP Right Grant
- 2001-10-02 PL PL355203A patent/PL198164B1/pl unknown
Non-Patent Citations (1)
Title |
---|
See references of WO0234410A1 * |
Also Published As
Publication number | Publication date |
---|---|
CZ20022225A3 (cs) | 2003-02-12 |
PL198164B1 (pl) | 2008-06-30 |
CZ301128B6 (cs) | 2009-11-11 |
WO2002034410A1 (de) | 2002-05-02 |
US6672521B2 (en) | 2004-01-06 |
DE50113290D1 (de) | 2008-01-03 |
EP1242190B1 (de) | 2007-11-21 |
PL355203A1 (en) | 2004-04-05 |
US20030001032A1 (en) | 2003-01-02 |
DE10053292C1 (de) | 2002-05-23 |
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