EP2136965A1 - Vorrichtung und verfahren zum partikelstrahlen mittels gefrorener gaspartikel - Google Patents
Vorrichtung und verfahren zum partikelstrahlen mittels gefrorener gaspartikelInfo
- Publication number
- EP2136965A1 EP2136965A1 EP08736171A EP08736171A EP2136965A1 EP 2136965 A1 EP2136965 A1 EP 2136965A1 EP 08736171 A EP08736171 A EP 08736171A EP 08736171 A EP08736171 A EP 08736171A EP 2136965 A1 EP2136965 A1 EP 2136965A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inlet
- carrier gas
- cavity
- space
- expansion space
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/003—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods using material which dissolves or changes phase after the treatment, e.g. ice, CO2
Definitions
- the invention relates to an apparatus and a method for pressure blasting by means of a mixture jet of frozen gas particles and a carrier gas.
- the invention relates to an apparatus and a method for CO 2 - snow blasting by means of a mixture jet of frozen CO 2 gas particles and a carrier gas.
- Frozen gas particles are particles of a substance that is gaseous at ordinary ambient temperature and pressure.
- the low hardness of solid carbon dioxide enables the damage-free processing of a wide range of materials and the sublimation of the Blasting agent must be disposed of only the removed, sorted coating or contamination.
- blasting agent When blasting by means of frozen gas particles, the blasting agent is pneumatically accelerated and applied to the surface to be processed.
- blasting with frozen gas particles is based on three different mechanisms of action.
- the low temperature of the blasting medium causes the thermal stress between coating and contamination of the substrate.
- the kinetic energy of the frozen gas particles leads to a mechanical separation, which is supported by the third effect, the pressure surge due to the sudden sublimation of the frozen gas particles.
- Such devices and methods are basically known and there are a variety of different types, which give the mixture jet of frozen gas particles and the carrier gas different properties in relation to, for example, speed, volume flow, size, number and expression of the frozen gas particles, so during operation a desired effect on the workpiece or the surface can be achieved.
- the first type which is also referred to as a dry ice blaster
- the second type which is also referred to as a snow blaster
- first of the solid phase and second of the liquid phase produces the blended streams.
- the blasting agent is produced in a separate process in the form of pellets or blocks and then added to the compressed air stream in a blasting system.
- an object of the present invention is to provide a device for pressure jets with frozen gas particles, which has a small size and thus can be easily integrated into machinery and equipment
- the present invention relates to a device for Compressive blasting by means of a mixture jet of frozen gas particles and a carrier gas according to the second type. Accordingly, in the devices described here, the blasting agent, in particular CO 2 , held in liquid form under pressure.
- the frozen gas particles formed in the Zweistoffringdüse have in comparison to the jet nozzle with agglomeration chamber a smaller diameter and thus a low kinetic energy at the same speed. Therefore, the particles that are produced according to this construction variant, have little abrasive and therefore such devices are mainly used for the purification of finely structured, highly sensitive components. Such a device is described in DE 199 26 119 C2.
- the liquefied gas is introduced together with the carrier gas stream into an agglomeration chamber and expanded.
- larger snow particles are generated, which accelerate with the compressed air in a subsequent nozzle, resulting in a significantly higher abrasiveness.
- the second design variant of the pressure-jet apparatus with agglomeration chamber has the disadvantages that a high pressure consumption can be recorded during operation.
- frozen gas particles deposit on the outer walls and - A -
- the aim of the present invention is therefore to provide a mixture jet technology, which is not covered by the known types and construction variants.
- the object of the present invention is the abrasiveness, i. H.
- This object is achieved by a device for particle blasting with frozen particles, which holds the blasting medium in liquid form and thus belongs to the group of snow blasting.
- the device has a nozzle housing which encloses an outer and an inner cavity.
- the inner cavity thereby constitutes an expansion space having an inlet connected to the liquefied gas supply for introducing a liquefied gas at its upstream longitudinal end and an orifice at its downstream longitudinal end.
- the mouth opening has a substantially larger cross-section than the inlet.
- This inner cavity is at least in the region of its mouth, surrounded by an outer cavity which is connected to at least one carrier gas supply.
- the inner cavity and the outer cavity have substantially round cross-sections.
- An initially tapering acceleration nozzle adjoins the opening of the relaxation space and the outer cavity in the flow direction, which has a carrier gas inlet located laterally, in particular on all sides of the opening, as an outlet of the outer cavity.
- the present invention is to reduce the abrasiveness, i. H.
- the size of the frozen gas particles as well as their amount adjustable and thus to make their Abrastage variable
- the cross section of the carrier gas inlet according to the invention variably adjustable.
- a metering device which represents the inlet of the expansion space and is preferably formed as a relaxation or needle nozzle preferably with a variably adjustable inner diameter.
- the flow diameter of the inner diameter of the metering device expands suddenly to the inner diameter of the expansion space.
- the liquefied gas relaxes in the expansion space, forming a mixture of frozen gas particles and gas.
- the diameter of the expansion space is designed so that the cross-section of the expansion space increases steadily downstream.
- both the volume flow of the flowing into the expansion space liquefied gas, and the inflowing into the outer cavity carrier gas flow is variably adjustable.
- the volume of the agglomeration space can also be variably adjusted according to a preferred embodiment of the invention.
- the volume of the agglomeration space can be changed by moving the metering device, which is located in the transition region between the supply of the liquefied gas and the expansion space, in the transition area and parallel to the flow direction. that can change that the length, or the volume of the agglomeration space.
- the agglomeration space can also be designed to be displaceable in the longitudinal axis, so that in this case too, the relative position of the metering device is displaceable in the transition area and thus the volume of the agglomeration space is variable.
- the volume of the expansion space can also be designed to be variable by means of a differently adjustable inner diameter of the expansion space.
- the flow conditions, as well as the size of the frozen gas particles can also be very different in the region of the inlet of the acceleration nozzle.
- the frozen gas particles may sublime when mixed with the carrier gas and before they can unfold the desired effect on the workpiece.
- an essential aspect of the invention is that the opening cross section of the carrier gas inlet, which is formed between the outer contour of the expansion space and the inner contour of the inlet of the acceleration nozzle, is variably adjustable.
- the device for pressure blasting by means of a mixture jet of frozen gas particles and a carrier gas is formed so that the mouth cross-section can be varied in that the relaxation space relative to the accelerating nozzle in the axial direction, relative to the longitudinal axis of the accelerating nozzle can be moved.
- the said opening cross-section is designed to be variably adjustable in that the expansion space is displaced in the orthogonal direction relative to the longitudinal axis of the acceleration nozzle. that can.
- the orifice cross-section at the said point can be varied in that the inner contour of the inlet of the acceleration nozzle and / or the outer contour of the outlet of the expansion space are designed to be variable at least on a portion of its circumference.
- FIGURE 1 shows a preferred embodiment of the invention in a cross-sectional view.
- the illustrated apparatus for pressure blasting has a nozzle housing 4 which includes an outer cavity 6 and an inner cavity 2.
- the inner cavity 2 is connected to a supply 7 for the introduction of liquefied gas into the inner cavity 2.
- the outer cavity 6 in turn communicates with a supply 3 for the introduction of pressurized carrier gas into the outer cavity 6.
- the inner cavity 2 is delimited at its one longitudinal end by an inlet 8, which is given according to the embodiment shown by the inner diameter of a metering device 1.
- the metering device 1 is arranged in a transition region between the feed 7 and the inner cavity 2.
- the metering device 1 is formed in the illustrated preferred embodiment as a needle nozzle and preferably has a diameter between 0.1 and 2 mm.
- the inner cavity 2 connects itself with a much larger diameter of 3 mm to 50 mm.
- the inner cavity 2 is also called relaxation space.
- the inner cavity 2 is delimited at its other longitudinal end by a mouth 9 which is located downstream. From the inlet 8 of the inner cavity 2 to the mouth opening 9, the diameter of the expansion space 2 widens continuously in the flow direction and is preferably between 5 and 70 mm at the mouth opening 9. During the passage through the inner cavity 2, individual particles agglomerate with other particles. Therefore, the inner cavity 2, which represents the relaxation space, also referred to as agglomeration space.
- an accelerating nozzle 5 which initially tapers in the flow direction and into which the mouth opening 9 of the expansion space 2 protrudes.
- the accelerating nozzle 5 has at its narrowest point a diameter of preferably between 2 and 20 mm. Because the outer contour of the expansion chamber 2 has a smaller diameter in the area of its orifice 9 than the diameter of the inner contour in the transitional region between the inner contour of the outer cavity 6 and the inlet of the acceleration nozzle 5, an annular carrier gas inlet 10 results in the acceleration nozzle 5, which is simultaneously Outlet of the outer cavity 6 is.
- the inner cavity 2 is designed to be displaceable in the axial direction with respect to the longitudinal axis of the accelerating nozzle 5 and opens into the accelerating nozzle 5 tapering there.
- the cross section of the carrier gas inlet 10 can thereby be varied into the accelerating nozzle 5 by longitudinal displacement of the inner cavity 2.
- the carrier gas inlet (10) preferably faces transversely to the longitudinal axis of the device, depending on the position of the orifice (9) within the device between the outer edge of the mouth (9) of the inner cavity (2) and the inner wall of the outer Cavity (6) or the acceleration nozzle (5) has a variably adjustable distance of between 0 and 2 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Carbon And Carbon Compounds (AREA)
- Nozzles (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007018338A DE102007018338B4 (de) | 2007-04-13 | 2007-04-13 | Vorrichtung und Verfahren zum Partikelstrahlen mittels gefrorener Gaspartikel |
PCT/EP2008/054466 WO2008125648A1 (de) | 2007-04-13 | 2008-04-14 | Vorrichtung und verfahren zum partikelstrahlen mittels gefrorener gaspartikel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2136965A1 true EP2136965A1 (de) | 2009-12-30 |
EP2136965B1 EP2136965B1 (de) | 2012-06-20 |
Family
ID=39540619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08736171A Not-in-force EP2136965B1 (de) | 2007-04-13 | 2008-04-14 | Vorrichtung und verfahren zum partikelstrahlen mittels gefrorener gaspartikel |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100279587A1 (de) |
EP (1) | EP2136965B1 (de) |
DE (1) | DE102007018338B4 (de) |
WO (1) | WO2008125648A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8187057B2 (en) * | 2009-01-05 | 2012-05-29 | Cold Jet Llc | Blast nozzle with blast media fragmenter |
DE102010064406A1 (de) | 2010-12-30 | 2012-07-05 | ipal Gesellschaft für Patentverwertung Berlin mbH | Vorrichtung und Verfahren zum Partikelstrahlen mittels gefrorener Gaspartikel |
WO2014131771A1 (de) | 2013-02-26 | 2014-09-04 | Robert Veit | Vorrichtung und verfahren zum partikelstrahlen mittels gefrorener gaspartikel |
US9931639B2 (en) | 2014-01-16 | 2018-04-03 | Cold Jet, Llc | Blast media fragmenter |
US10293464B2 (en) * | 2015-05-05 | 2019-05-21 | Corning Incorporated | Abrading device |
KR102335041B1 (ko) * | 2020-04-17 | 2021-12-03 | 주식회사 바이오메카트로닉 | 드라이아이스 분무식 세정장치 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3212217A (en) * | 1963-05-28 | 1965-10-19 | Tex Tube Inc | Cleaning device |
JPS5969262A (ja) * | 1982-10-11 | 1984-04-19 | Fukashi Uragami | 研掃装置 |
JPH025899Y2 (de) * | 1984-12-05 | 1990-02-13 | ||
US4806171A (en) * | 1987-04-22 | 1989-02-21 | The Boc Group, Inc. | Apparatus and method for removing minute particles from a substrate |
FR2658748B1 (fr) * | 1990-02-23 | 1994-12-23 | Soudure Autogene Francaise | Procede et dispositif de coupe par jet de liquide. |
JP2963158B2 (ja) * | 1990-07-24 | 1999-10-12 | 株式会社不二精機製造所 | スラリイ圧送式ブラスト装置 |
US5599223A (en) * | 1991-04-10 | 1997-02-04 | Mains Jr.; Gilbert L. | Method for material removal |
US5512005A (en) * | 1992-08-28 | 1996-04-30 | Michael P. Short | Process and apparatus for automatically engraving stone memorial markers |
US5405283A (en) * | 1993-11-08 | 1995-04-11 | Ford Motor Company | CO2 cleaning system and method |
US5779523A (en) * | 1994-03-01 | 1998-07-14 | Job Industies, Ltd. | Apparatus for and method for accelerating fluidized particulate matter |
US5664992A (en) * | 1994-06-20 | 1997-09-09 | Abclean America, Inc. | Apparatus and method for cleaning tubular members |
US5931721A (en) * | 1994-11-07 | 1999-08-03 | Sumitomo Heavy Industries, Ltd. | Aerosol surface processing |
US5725154A (en) * | 1995-08-18 | 1998-03-10 | Jackson; David P. | Dense fluid spray cleaning method and apparatus |
FR2764215B1 (fr) * | 1997-06-04 | 1999-07-16 | Carboxyque Francaise | Lance et appareil de production d'un jet de c02 liquide, et son application a une installation de nettoyage de surfaces |
ATE211957T1 (de) * | 1997-12-05 | 2002-02-15 | Kipp Jens Werner | Strahlverfahren zum reinigen von rohren |
US5944581A (en) * | 1998-07-13 | 1999-08-31 | Ford Motor Company | CO2 cleaning system and method |
DE19926119C2 (de) | 1999-06-08 | 2001-06-07 | Fraunhofer Ges Forschung | Strahlwerkzeug |
WO2003022525A2 (de) * | 2001-09-11 | 2003-03-20 | Jens Werner Kipp | Strahlverfahren und -vorrichtung |
DE20214063U1 (de) * | 2002-09-11 | 2003-03-06 | Müller, Ulrich, 78664 Eschbronn | C02-Kaltgasdüse |
DE10243693B3 (de) | 2002-09-20 | 2004-04-01 | Jens Werner Kipp | Strahlverfahren und-vorrichtung |
DE10254159A1 (de) * | 2002-11-20 | 2004-06-03 | Linde Ag | Trockeneisstrahlen mit Mantelstrom |
NL1022293C2 (nl) * | 2002-12-31 | 2004-07-15 | Tno | Inrichting en werkwijze voor het vervaardigen of bewerken van optische elementen en/of optische vormelementen, alsmede dergelijke elementen. |
KR20040101948A (ko) * | 2004-05-31 | 2004-12-03 | (주)케이.씨.텍 | 표면세정용 승화성 고체입자 분사용 노즐 및 이를 이용한 세정방법 |
US7140954B2 (en) * | 2004-10-21 | 2006-11-28 | S. A Robotics | High pressure cleaning and decontamination system |
US8454409B2 (en) * | 2009-09-10 | 2013-06-04 | Rave N.P., Inc. | CO2 nozzles |
-
2007
- 2007-04-13 DE DE102007018338A patent/DE102007018338B4/de not_active Expired - Fee Related
-
2008
- 2008-04-14 EP EP08736171A patent/EP2136965B1/de not_active Not-in-force
- 2008-04-14 US US12/450,827 patent/US20100279587A1/en not_active Abandoned
- 2008-04-14 WO PCT/EP2008/054466 patent/WO2008125648A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2008125648A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2136965B1 (de) | 2012-06-20 |
WO2008125648A1 (de) | 2008-10-23 |
US20100279587A1 (en) | 2010-11-04 |
DE102007018338A1 (de) | 2008-10-16 |
DE102007018338B4 (de) | 2010-09-23 |
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