EP1560663A1 - Ultraschall-stehwellen-zerstäuberanordnung - Google Patents
Ultraschall-stehwellen-zerstäuberanordnungInfo
- Publication number
- EP1560663A1 EP1560663A1 EP03811742A EP03811742A EP1560663A1 EP 1560663 A1 EP1560663 A1 EP 1560663A1 EP 03811742 A EP03811742 A EP 03811742A EP 03811742 A EP03811742 A EP 03811742A EP 1560663 A1 EP1560663 A1 EP 1560663A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ultrasonic
- paint
- standing wave
- sonotrode
- sound
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
Definitions
- the invention relates to an ultrasonic standing wave atomizer arrangement for generating a paint spray for painting a workpiece with a sonotrode, with a component arranged opposite the sonotrode, a standing ultrasonic field being formed in the operating space between the sonotrode and component, and with a paint supply device , by means of which lacquer can be fed into the close range of a maximum of the sound velocity of the ultrasonic field.
- the generally known high-speed atomizers are currently preferably used for painting workpieces, in particular in the case of mass painting, as is often the case in the automotive industry.
- the paint is passed through the inside of a metal bell and thus reaches the front side facing the workpiece.
- the metal bell is usually driven by a compressed air turbine and rotates at up to 80,000 revolutions per minute. Due to the centrifugal forces, the paint then reaches the edge of the bell on the front side to tear off there in fine droplets. In this way it is achieved that the droplet size of the paint spray mist required for a sufficient quality of a paint layer is in the range from 10 ⁇ m to 60 ⁇ m.
- lacquer can in principle also be atomized by means of ultrasonic standing wave atomization. Following these fundamental considerations, however, average droplet sizes were measured during atomization between 100 ⁇ m and 200 ⁇ m, with larger droplets occurring in individual cases. Such large drops, however, have such a negative impact on the quality of the paint layer that use in painting technology is unattractive. It has been proposed how an ultrasonic standing wave atomizer arrangement for generating a paint spray for painting a workpiece can be designed in order to achieve smaller droplet sizes. For example, certain configurations of the sonotrode and the component, blocking elements or lamellar rings have become known which improve the quality of the paint spray produced and thus comparatively small droplet sizes can be achieved. The disadvantage here is that only comparatively small delivery rates of paint can be atomized by the arrangement that has become known.
- the inventive ultrasonic standing wave atomizer arrangement of the type mentioned at the outset has a paint supply device which has at least two pipe sections for applying paint in the area of the standing ultrasonic field.
- at least two of the pipe sections are arranged in the region of a selected maximum of the sound velocity of the standing ultrasound field. According to the invention, it is therefore provided that a selected maximum of the sound velocity of a standing ultrasonic wave is used to atomize a comparatively large amount of paint into paint droplets.
- a selected maximum of the sound velocity is often particularly well developed in the standing ultrasound field, for example in the case of standing ultrasound fields with an odd number of sound velocity bellies, the middle sound velocity antinode. This means that this maximum is particularly stable with a comparatively high sound speed.
- This particularly good atomization properties of the selected maximum is used according to the invention to increase the amount of paint to be atomized or of the paint flow through the paint supply device, and it is provided that at least two pipe pieces for applying paint are arranged in the region of the selected maximum. The amount of lacquer to be atomized can thus advantageously be increased.
- An advantageous embodiment of the ultrasonic standing wave atomizer arrangement according to the invention is achieved if the component is a further sonotrode. In this way, the ability to atomize the standing ultrasonic field can be increased. In addition, a more stable ultrasonic field can be formed in this way.
- a further advantageous embodiment of the subject matter of the invention provides that the distance between the pipe sections in the region of the selected maximum is so great that varnished lamellae are formed for each pipe section.
- a lacquer lamella forms on the pipe sections from the lacquer exit point for reasons of vibration physics. If the distance between the pipe sections is chosen so large that the lacquered lamellae can form separately from one another without any interference, an area is avoided in any case where droplets from different lacquered lamellae meet and can thus recombine to form larger droplets. The quality of the paint spray is improved with the proposed arrangement.
- a standing ultrasonic wave is arranged in a straight line in the region of the selected maximum of the sound velocity, and if the straight line is perpendicular to an imaginary center line, which is defined by the surface centers of the opposing sound surfaces the sonotrode and the component goes.
- the distance between the paint exit points on the pipe sections and the sonotrode or the component will each be approximately the same size.
- the above-mentioned advantage can also be achieved if three pipe sections are arranged in the region of a selected maximum of the sound velocity of a standing ultrasound wave, and if these pipe sections or their paint outlet openings are arranged in a triangle.
- a further improvement is when the surface that is defined by the triangle is perpendicular to an imaginary center line that passes through the surface centers of the opposing sound surfaces of the sonotrode and the component. In this case, too, it is again achieved that the paint outlet openings are located in the area of the maximum of the sound velocity, viewed in the X direction.
- the sputtering process or the sputtering rate can be improved by selecting the determined maximum in such a way that it is closer to the sonotrode than to the component. Then there is the possibility that the so-called capillary wave sputtering effect, that is the effect that keeps the paint droplets away from the vibrations of the sonotrode and thus supports the atomization process.
- Fig. 5 shows a fifth ultrasonic standing wave atomizer arrangement
- Fig. 6 shows a sixth ultrasonic standing wave atomizer arrangement.
- FIG. 1 shows a first ultrasonic standing wave atomizer arrangement 10 according to the invention in an isometric representation.
- the coordinates are indicated by the direction arrows for the X, Y and Z directions in a Cartesian coordinate system.
- the representation should only have a sketchy character, so that the actual proportions of this figure cannot be seen.
- a first sonotrode 12 is arranged opposite a first reflection body 14.
- the sonotrode 12 is sketched by a cylindrical " base body 16 and a sound body 18 which protrudes from the end face of the cylindrical base body 16 facing the first reflection body 14.
- the sound body 18 and the base body 16 have an approximately cylindrical shape Opposing end faces of the sound body 18 and the first reflection body 14 are to be referred to as the first sound surface 20 for the front surface on the sound body 18 and as the second sound surface 22 for the front side on the first reflection body 14.
- the first 20 and the second sound surface 22 are configured to be concave, This means that their shape corresponds approximately to a section of the surface of an imaginary hollow sphere.
- a first dotted line 24 and a second dotted line 26 were drawn on the first sound surface 20.
- the intersection between de r The first 24 and the second line 26 lie exactly in the middle on the first sound surface 20.
- Lines corresponding to the first 24 and the second line 26 are also shown on the second sound surface 22, but without being provided with reference numerals.
- a central axis 28 is shown through the intersection of the first 24 with the second line 26 and the corresponding lines of the second sound surface 22, which runs exactly in the X coordinate direction.
- a first 30, a second 31 and a third pipe piece 32 are shown, the free ends of which are arranged exactly in the middle between the sound surfaces 20, 22.
- the pipe sections 30, 31, 32 are arranged next to one another, the free ends all lying in a plane which is defined by the central axis 28 and the second line 26.
- all free ends can be connected with an imaginary straight line.
- the longitudinal axes of the pipe sections 30, 31, 32 are arranged parallel to the Y direction and are connected at their ends opposite ends to a paint feed device 29 (not shown in more detail in this figure) which contains the paint to be atomized by the first ultrasonic standing wave atomizer arrangement 10 the required amount. But it is also within the The inventive concept if each of the pipe sections 30, 31, 32 is connected to a separate paint feed device 29. In any case, this should also be meant by the lacquer feed device 29 described here.
- a first distance 34 between the first sound surface 20 and the pipe sections 30, 31, 32 and a second distance 36 between the pipe sections 30, 31, 32 and the second sound surface 22 are of the same size. It is therefore clear that the relevant free ends of the pipe sections 30, 31, 32 are all located in only one maximum of the sound fast, namely in the middle of the five sound fast bellies.
- a first 34 or a second distance 36 of 17 mm results for an ultrasound frequency of 24 kH and five acoustic bellies.
- the atomization process is shown in this figure only symbolically at the respective free ends of the tube pieces 30, 31, 32, in which many small paint particles are shown around an atomization bubble shown in an exaggerated size.
- FIG. 2 shows a second ultrasonic standing wave atomizer arrangement 40, which essentially has the same components as the first ultrasonic standing wave atomizer. should have arrangement 10, which is why the reference numerals for identical components were chosen the same.
- An essential difference between the first 10 and the second ultrasonic standing wave atomizer arrangement 40 is that, in contrast to the arrangement shown in FIG. 1, the arrangement of the tube pieces 30, 31, 32 is no longer centered between the sound bodies 18 and the first reflection body takes place, but closer to the sound body 18.
- the arrangement of the tube pieces 30, 31, 32 is selected such that their lacquer exit openings in turn come to lie in a selected maximum of sound velocity of the standing ultrasonic wave, namely in the second maximum shown, seen from the sound body 18 ,
- a third distance 38 between the sound body 18 and the pipe sections 30, 31, 32 is smaller than a fourth distance 39, which is determined as the distance between the pipe sections 30, 31, 32 and the first reflection body 14
- the arrangement shown here proves to be advantageous in that the pipe sections 30, 31, 32 are closer to the first sonotrode 12. It has been found that the vibrations of the sound body 18 of the first sonotrode 12 comparatively well prevent the atomized paint droplets from adhering to the sonotrode due to the vibration of the sound body 18. In other words, the vibrations of the sound body 18 keep the paint droplets away from it.
- the representation of the pipe sections 30, 31, 32 and the atomization bubbles shown with the atomized paint particles should show that the distance between the pipe sections 30, 31, 32 is selected such that there are at the free ends of the pipe sections 30, 31, 32 in each case form atomization areas which work independently of one another, that is to say that for each tube piece 30, 31, 32, varnish lamellae are formed which are separate from one another.
- This has the advantage that the areas in which the applied paint is atomized into particles do not interfere with each other. This improves the atomization process and achieves a comparatively high atomization rate.
- Fig. 3 shows a further advantageous embodiment of the subject matter of the invention with a third ultrasonic standing wave atomizer arrangement 50, which is constructed essentially similar to the first ultrasonic standing wave atomizer arrangement 10.
- the same reference numerals were therefore used for comparable components.
- a fourth 42, a fifth 43 and a sixth pipe section 44 are arranged exactly in the middle between the sound body 18 and the first reflection body 14.
- the corresponding paint outlet openings of the pipe sections 42, 43, 44 are accordingly again arranged in the region of the average maximum of sound speed, but the paint outlet openings no longer lie in the plane spanned by the X, Z direction, but the middle fifth pipe section 43 lies in positive Y direction, above the plane spanned by the X, Z direction, while the fourth 42 and the sixth pipe section 44 lie below the plane spanned by the X, Z direction.
- FIG. 4 shows a fourth ultrasonic standing wave atomizer arrangement 60 with a second reflection body 46, which is arranged opposite a second sonotrode 48.
- Three first paint tubes 52 are in turn arranged centrally between the second reflection body 46 and the second sonotrode 48. Similar to FIG. 1, the paint outlet openings of the first paint tubes 52 are aligned along an imaginary line in the Z direction.
- a special feature of the arrangement shown is that a second sound body 54 on the second sonotrode 48 and the second reflection body 46 have an approximately cuboid shape, the opposing sound surfaces of the second sound body 54 and the second reflection body 46, namely the third sound surface 56 on the second sound body 54 and the fourth sound surface 48 on the second reflection body 46 have a shape which corresponds to a jacket section of a cylindrical body.
- the imaginary central axis of the cylindrical body runs parallel to the line 62 that runs through the paint outlet openings of the first paint tube 52.
- the projections 64 of the central axis of the imaginary cylinder on the third 56 and on the fourth sound surface 58 are shown as dotted lines.
- a fifth ultrasonic standing wave atomizer assembly 70 is shown in FIG. 5.
- the arrangement shown is similar to that of FIG. 4, so that the second paint tubes 52 are again arranged centrally between a fifth sound surface 66 and a sixth sound surface 68.
- the fifth 66 and the sixth sound surface 68 are composed of flat partial surfaces, the shape of which, however, is modeled on that of a jacket section of a cylindrical body. In this way, too, a broadening of the range of the maximum sound velocity in the standing ultrasound field is achieved.
- FIG. 6 shows a sixth ultrasonic standing wave atomizer arrangement, which is based on the arrangement of the first sonotrode 12 with the first reflection body 14, as shown in FIG. 1.
- the reference numerals have been taken from FIG. 1 accordingly.
- three second paint tubes 72 are arranged corresponding to the tube pieces 30, 31, 32, as shown in FIG. 1, and are therefore at the same distance from the sonotrode 12 and from the first reflection body 14, which is shown here by the second distance 36 is shown.
- three third paint tubes 74 are shown in this figure, which are shown in the position that corresponds to the position of the tube pieces 30, 31, 32 in FIG. 2. This means that their distance between the third paint tubes 74 and the sound body 18 corresponds to the third distance 38 according to FIG. 2.
- cleaning air can be used in the generally known manner to substantially prevent atomized paint from adhering to the sonotrode or to the reflection body.
- steering air can be used so that the atomized paint particles preferably fly in the desired direction of the paint job.
- the process of directional painting can also be supported by electrostatically charging the paint particles. This charging can be achieved in a generally known manner internally, that is to say with the paint supplied at high voltage potential, or by means of the so-called external charge, which usually charge the atomized paint by means of high-voltage needles, which are arranged in the vicinity of the atomization point.
- the workpiece to be painted is then usually grounded so that the electrically charged paint particles preferably fly to the workpiece.
- a combination of internal and external charging is also easily possible.
- the reflection body is a further sonotrode, with the particular advantage that the standing ultrasound field can be made particularly strong.
- the controllability of the ultrasound field is improved with such a measure.
- first ultrasonic standing wave atomizer arrangement first sonotrode first reflection body base body first sound body first sound surface second sound surface first line second line center axis first pipe section second pipe section third pipe section first distance second distance third distance fourth distance second ultrasound standing wave atomizer arrangement fourth pipe section fifth pipe section sixth pipe section second reflection body second sonotrode third ultrasonic standing wave atomizer arrangement first lacquer tube second sound body third sound surface fourth sound surface fourth ultrasonic standing wave atomizer application Line projections fifth sound surface sixth sound surface fifth ultrasonic standing wave atomizer arrangement second lacquer tube third lacquer tube sixth ultrasonic standing wave atomiser arrangement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Special Spraying Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252437A DE10252437A1 (de) | 2002-11-12 | 2002-11-12 | Ultraschall-Stehwellen-Zerstäuberanordnung |
DE10252437 | 2002-11-12 | ||
PCT/EP2003/011967 WO2004048001A1 (de) | 2002-11-12 | 2003-10-29 | Ultraschall-stehwellen-zerstäuberanordnung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1560663A1 true EP1560663A1 (de) | 2005-08-10 |
EP1560663B1 EP1560663B1 (de) | 2007-09-05 |
Family
ID=32185480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03811742A Expired - Fee Related EP1560663B1 (de) | 2002-11-12 | 2003-10-29 | Ultraschall-stehwellen-zerstäuberanordnung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060005766A1 (de) |
EP (1) | EP1560663B1 (de) |
JP (1) | JP2006505407A (de) |
DE (2) | DE10252437A1 (de) |
WO (1) | WO2004048001A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10327429A1 (de) * | 2003-06-18 | 2005-01-05 | Abb Patent Gmbh | Ultraschall-Stehwellen-Zerstäuberanordnung |
US8740111B2 (en) | 2009-11-17 | 2014-06-03 | Black & Decker Inc. | Paint sprayer |
US8413911B2 (en) | 2009-11-17 | 2013-04-09 | Black & Decker Inc. | Paint sprayer |
WO2011062992A1 (en) * | 2009-11-17 | 2011-05-26 | Black & Decker Inc. | Quick release mechanism for paint sprayer |
US8550376B2 (en) | 2009-11-17 | 2013-10-08 | Black & Decker Inc. | Paint sprayer |
US9180472B2 (en) * | 2009-11-17 | 2015-11-10 | Black & Decker Inc. | Paint sprayer |
US8651402B2 (en) * | 2009-11-17 | 2014-02-18 | Black & Decker Inc. | Adjustable nozzle tip for paint sprayer |
DE102012107076A1 (de) | 2011-08-24 | 2013-02-28 | Technische Hochschule Wildau | Verfahren und Vorrichtung zum thermischen Spritzen von Beschichtungswerkstoffen |
GB2542384A (en) | 2015-09-17 | 2017-03-22 | The James Hutton Inst | Atomiser assembly |
US10864541B2 (en) | 2018-01-30 | 2020-12-15 | Ford Motor Company | Ultrasonic atomizer with quick-connect mechanism |
CN109622980A (zh) * | 2019-01-28 | 2019-04-16 | 哈尔滨工业大学 | 一种熔融金属超声驻波非接触式雾化制粉装置及方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2987068A (en) * | 1956-05-01 | 1961-06-06 | Branson Instr | Apparatus for ultrasonic cleaning |
US3198170A (en) * | 1961-03-11 | 1965-08-03 | Copal Co Ltd | Ultrasonic-wave painting machine |
DE2656330C2 (de) * | 1976-12-13 | 1984-03-15 | Battelle-Institut E.V., 6000 Frankfurt | Verfahren und Vorrichtung zur Herstellung von Pulvern oder Granulaten aus Metallen und Legierungen |
DE2842232C2 (de) * | 1978-09-28 | 1985-04-18 | Battelle-Institut E.V., 6000 Frankfurt | Verfahren und Vorrichtung zum Zerstäuben von Flüssigkeiten, Suspensionen und Emulsionen, agglomerierten Stäuben bzw. Pulvern sowie Mischungen derselben |
US4600472A (en) * | 1979-12-14 | 1986-07-15 | General Foods Corporation | Apparatus for cooking or gelatinizing materials |
DE3717831A1 (de) * | 1987-05-27 | 1988-12-08 | Hoechst Ag | Verfahren zum herstellen eines sinterkoerpers |
DE3735787A1 (de) * | 1987-09-22 | 1989-03-30 | Stiftung Inst Fuer Werkstoffte | Verfahren und vorrichtung zum zerstaeuben mindestens eines strahls eines fluessigen stoffs, vorzugsweise geschmolzenen metalls |
DE3732325A1 (de) * | 1987-09-25 | 1989-04-13 | Battelle Institut E V | Vorrichtung zum zerstaeuben eines fluessigen mediums mit hilfe von ultraschall |
DE3939178A1 (de) * | 1989-11-27 | 1991-05-29 | Branson Ultraschall | Vorrichtung zum zerstaeuben von fluessigen und festen stoffen, vorzugsweise geschmolzenen metalls |
US5259593A (en) * | 1990-08-30 | 1993-11-09 | University Of Southern California | Apparatus for droplet stream manufacturing |
DE4328088B4 (de) * | 1993-08-20 | 2005-05-25 | Artur Prof. Dr. Goldschmidt | Verfahren zum Beschichten von Werkstücken mit organischen Beschichtungsstoffen |
DE19647947A1 (de) * | 1996-11-20 | 1998-05-28 | Pfeiffer Erich Gmbh & Co Kg | Austragvorrichtung für Medien |
DE19705400A1 (de) * | 1997-02-13 | 1998-08-20 | Walter Barth | Mehrfachdüsen-Vorrichtung zur Verputzaufbringung o. dgl. an Baukörpern |
US5921764A (en) * | 1997-07-18 | 1999-07-13 | Stirling Thermal Motors, Inc. | Heat engine combustor |
-
2002
- 2002-11-12 DE DE10252437A patent/DE10252437A1/de not_active Withdrawn
-
2003
- 2003-10-29 DE DE50308133T patent/DE50308133D1/de not_active Expired - Fee Related
- 2003-10-29 JP JP2004554295A patent/JP2006505407A/ja active Pending
- 2003-10-29 US US10/526,546 patent/US20060005766A1/en not_active Abandoned
- 2003-10-29 WO PCT/EP2003/011967 patent/WO2004048001A1/de active IP Right Grant
- 2003-10-29 EP EP03811742A patent/EP1560663B1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004048001A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10252437A1 (de) | 2004-05-27 |
EP1560663B1 (de) | 2007-09-05 |
DE50308133D1 (de) | 2007-10-18 |
US20060005766A1 (en) | 2006-01-12 |
JP2006505407A (ja) | 2006-02-16 |
WO2004048001A1 (de) | 2004-06-10 |
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