US20100279587A1 - Apparatus and method for particle radiation by frozen gas particles - Google Patents

Apparatus and method for particle radiation by frozen gas particles Download PDF

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Publication number
US20100279587A1
US20100279587A1 US12/450,827 US45082708A US2010279587A1 US 20100279587 A1 US20100279587 A1 US 20100279587A1 US 45082708 A US45082708 A US 45082708A US 2010279587 A1 US2010279587 A1 US 2010279587A1
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US
United States
Prior art keywords
expansion space
outlet opening
inlet
nozzle
carrier gas
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.)
Abandoned
Application number
US12/450,827
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English (en)
Inventor
Robert Veit
Eckart Uhlmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technische Universitaet Berlin
Original Assignee
Technische Universitaet Berlin
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Filing date
Publication date
Application filed by Technische Universitaet Berlin filed Critical Technische Universitaet Berlin
Assigned to TECHNISCHE UNIVERSITAT BERLIN reassignment TECHNISCHE UNIVERSITAT BERLIN ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UHLMANN, ECKART, VEIT, ROBERT
Publication of US20100279587A1 publication Critical patent/US20100279587A1/en
Abandoned legal-status Critical Current

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    • 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 a device and a method for pressure blasting by means of a mixed jet made of frozen gas particles and a carrier gas.
  • the invention relates in particular to a device and a method for CO 2 snow blasting by means of a mixed jet made of frozen CO 2 gas particles and a carrier gas.
  • Frozen gas particles are particles made of a substance, which is gaseous at normal ambient temperature and normal ambient pressure.
  • the low hardness of solid carbon dioxide facilitates treating a large spectrum of materials without damaging them. Due to the sublimation of the blasting media only the removed pure coating or contamination has to be disposed of.
  • blasting media When blasting by means of frozen gas particles, the blasting media is pneumatically accelerated and applied to the surface to be treated. Contrary to the purely mechanical effect of other blasting media, blasting with frozen gas particles is based on three different effects. Through the low temperature of the blasting media, a thermal tension between the coating and contamination of the substrate is created. Furthermore, the kinetic energy of the frozen gas particles leads to a mechanical separation which is supported by the third effect, the pressure shock due to the instantaneous sublimation of the frozen gas particles.
  • Such devices and methods are known in principle and there is a multitude of different configurations, which give the mixed jet made of frozen gas particles and the carrier gas different properties with respect to e.g. velocity, volume flow, size, number and characteristics of the frozen gas particles, so that a desired effect can be created on the work piece or the surface during operation.
  • the first configuration which is also designated as dry ice blaster differs from the second configuration which is also designated as snow blaster, in that the first type generates the mixed jet from the solid phase and the second type generates the mixed jet from the liquid phase.
  • the blasting media is provided in a separate process in the form of pellets or blocks, and subsequently added to the compressed airflow in a blasting apparatus.
  • the present invention relates to a device for pressure blasting by means of a mixed jet comprised of frozen gas particles and a carrier gas according to the second configuration. Accordingly, the blasting medium, in particular CO 2 , is stored under pressure in liquid phase in the devices described herein.
  • this configuration which is also designated as a snow blaster
  • two configurations are differentiated in turn: the two-material ring nozzle and the blasting nozzle with an agglomeration chamber.
  • the liquid gas is expanded to ambient pressure at the exit of the nozzle.
  • the snow particles created are focused and accelerated by an enveloping jet made of supersonic compressed air.
  • the frozen gas particles formed in the two-material ring nozzle have a lower diameter compared to the ones formed in the blasting nozzle with agglomeration chamber, and thus have lower kinetic energy at the same velocity. Therefore, the particles which are generated according to said configuration have little abrasive effect, and such devices are therefore used primarily for cleaning highly sensitive components with a fine structure. Such a device is described in DE 199 26 119 C2.
  • liquefied gas is inducted into an agglomeration chamber together with the carrier gas flow and expanded.
  • larger snow particles are created compared to the two-material ring nozzle, which are then accelerated through the compressed air in a subsequent nozzle and cause a significantly stronger abrasive effect.
  • the second variant of the pressure blasting device with agglomeration chamber has the disadvantage that a high pressure drop occurs during operation. Furthermore, frozen gas particles accumulate in the interior of the agglomeration chamber at the outer walls and disengage from the outer walls in uneven time intervals and with undefined size. Thus, the materials removal rate increases in pulses, which creates an inhomogeneous blasting pattern.
  • a CO 2 cold gas jet for pressure blasting by means of a mixed jet comprised of CO 2 particles and compressed air is known from DE 202 14 063 U1.
  • the object of the present invention to configure the abrasiveness, this means in particular the size of the frozen gas particles and their volume adjustable and thus to make their abrasiveness variable.
  • This object is accomplished by a device for particle blasting with frozen particles, which stores the blasting medium in liquid form.
  • the device is among the group of snow blasting devices.
  • the device according to the invention comprises a nozzle housing which encloses an outer and an inner cavity.
  • the inner cavity forms an expansion—or agglomeration space, which comprises an inlet connected to the supply for liquefied gas for inducting a liquefied gas at a longitudinal end disposed upstream, and an outlet opening at its longitudinal end disposed downstream.
  • the outlet opening thus comprises a much larger cross section than the inlet.
  • This inner cavity is enveloped by an outer cavity at least in the portion of the outlet of the inner cavity, which outer cavity is connected to at least one carrier gas supply.
  • the inner cavity and the outer cavity preferably comprise circular cross sections.
  • An initially converging acceleration nozzle connects in flow direction to the outlet opening of the expansion space and to the outer cavity, which acceleration nozzle comprises a lateral carrier gas inlet as an outlet for the outer cavity, which carrier gas inlet is in particular disposed on all sides of the outlet opening.
  • the cross section of the carrier gas inlet is variably adjustable according to the invention.
  • a dosage device which forms the inlet for the expansion space and which is configured preferably as an expansion—or needle valve nozzle preferably with a variably adjustable interior diameter.
  • the flow diameter instantaneously expands from the inner diameter of the dosage device to the inner diameter of the expansion space. This expands the liquefied gas in the expansion space which forms a mixture made from frozen gas particles and gas.
  • the diameter of the expansion space is configured, so that the cross section of the expansion space continuously increases downstream.
  • Said cross section expansion of the expansion space towards the nozzle exhaust provides a continuous flow and thus a safe removal of the snow particles created.
  • accretion and accumulation of solid gas particles occurs in the so-called “dead spaces” directly after jetting in the liquefied gas.
  • These accretions come off in uneven time intervals, so that an inhomogeneous and pulsating blasting pattern of the nozzle is created, which is also designated “coughing” in the art.
  • the comparatively large particle agglomerations have a higher kinetic energy and thus impact the blasted surface more strongly. This effect is negative for reproducible application of the snow blasting technique.
  • the accumulation of frozen gas particles can create a plugging of the blasting nozzle.
  • the abrasiveness substantially is a function of the particle size, which is also a function of the length or the volume of the expansion space or the agglomeration space according to a preferred embodiment of the invention
  • the volume of the agglomeration space is also variably adjustable according to a preferred embodiment of the invention.
  • the volume of the agglomeration space can be varied in that the dosage device which is disposed in the transition portion between the supply for the liquefied gas and the expansion space can be moved in the transition portion and parallel to the flow direction, so that the length or the volume of the agglomeration space changes.
  • the agglomeration space can be configured movable in the direction of the longitudinal axis, so that also here the relative position of the dosage device is movable in the transition portion so that the volume of the agglomeration space is variable.
  • the volume of the expansion space can also be configured variable through a variably adjustable inner diameter of the expansion space according to another embodiment of the invention.
  • an essential feature of the invention is comprised in that the outlet 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 configured variably adjustable.
  • the device for pressure blasting by means of a mixed jet made of frozen gas particles and a carrier gas is configured, so that the outlet cross section can be varied in that the expansion space can be moved in axial direction relative to the acceleration nozzle with reference to the longitudinal axis of the acceleration nozzle.
  • said outlet cross section is configured variably adjustable in that the expansion space is movable in orthogonal direction relative to the longitudinal axis of the acceleration nozzle.
  • the outlet cross section at said location can be varied in that the inner contour of the acceleration nozzle and/or the outer contour of the outlet of the expansion space can be configured variably at least on a partial portion of its circumference.
  • FIG. 1 shows a preferred embodiment of the invention in a cross sectional view.
  • the illustrated device for pressure blasting comprises a nozzle housing 4 which encloses an outer cavity 6 and an inner cavity 2 .
  • the inner cavity 2 is connected to a supply 7 for inducting liquefied gas into the inner cavity 2 .
  • the outer cavity 6 in turn is connected with a supply 3 for inducting pressurized carrier gas into the outer cavity 6 .
  • the inner cavity 2 is defined by an inlet 8 at one longitudinal end, which inlet 8 is defined by the inner diameter of a dosage device 1 according to the illustrated embodiment.
  • the dosage device 1 is disposed in a transition portion between the supply 7 and the inner cavity 2 .
  • the dosage device 1 is configured as a needle valve nozzle in the illustrated preferred embodiment and preferably has a diameter between 0.1 mm and 2 mm. After the dosage device 1 operating as an inlet 8 for the inner cavity 2 , the inner cavity 2 itself is connected, which comprises a much larger diameter of 3 mm to 50 mm.
  • the inner cavity 2 is also designated as expansion space.
  • the inner cavity 2 is defined by an outlet opening 9 at its other longitudinal end, which outlet opening is disposed downstream. From the inlet 8 of the inner cavity 2 to the outlet opening 9 , the diameter of the expansion space 2 continuously expands in flow direction, and preferably has a dimension between 5 mm and 70 mm at the outlet opening 9 . While flowing through the inner cavity 2 , particular particles agglomerate with other particles. Therefore, the inner cavity 2 which forms the expansion space is also designated as agglomeration space.
  • an acceleration nozzle 5 is connected, which initially contracts in flow direction and which protrudes into the outlet opening 9 of the expansion space 2 .
  • the acceleration nozzle 5 has a diameter of preferably between 2 mm and 20 mm at its tightest location. Since the outer contour of the expansion space 2 comprises a smaller diameter in the portion of its outlet opening 9 , than the diameter of the inner contour in the transition portion between the inner contour of the outer cavity 6 and the inlet of the acceleration nozzle 5 , an annular carrier gas inlet 10 into the acceleration nozzle 5 is created, which annular carrier gas inlet simultaneously forms the outlet of the outer cavity 6 .
  • the inner cavity 2 is configured movable in axial direction with respect to the longitudinal axis of the acceleration nozzle 5 and leads into the acceleration nozzle 5 which contracts at this location. Thereby, the cross section of the carrier gas inlet 10 into the acceleration nozzle 5 can be varied through longitudinal movement of the inner cavity 2 .
  • the carrier gas inlet 10 preferably comprises a variably adjustable offset between 0 mm and 2 mm, transversal to the longitudinal axis of the device as a function of the position of the nozzle opening 9 within the device between the outer edge of the nozzle opening 9 of the inner cavity 2 and the inner wall of the outer cavity 6 or of the acceleration nozzle 5 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Nozzles (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
US12/450,827 2007-04-13 2008-04-14 Apparatus and method for particle radiation by frozen gas particles Abandoned US20100279587A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102007018338A DE102007018338B4 (de) 2007-04-13 2007-04-13 Vorrichtung und Verfahren zum Partikelstrahlen mittels gefrorener Gaspartikel
DE102007018338.2 2007-04-13
PCT/EP2008/054466 WO2008125648A1 (fr) 2007-04-13 2008-04-14 Dispositif et procédé pour la projection de particules grâce à des particules de gaz surgelées

Publications (1)

Publication Number Publication Date
US20100279587A1 true US20100279587A1 (en) 2010-11-04

Family

ID=39540619

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/450,827 Abandoned US20100279587A1 (en) 2007-04-13 2008-04-14 Apparatus and method for particle radiation by frozen gas particles

Country Status (4)

Country Link
US (1) US20100279587A1 (fr)
EP (1) EP2136965B1 (fr)
DE (1) DE102007018338B4 (fr)
WO (1) WO2008125648A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021210845A1 (fr) * 2020-04-17 2021-10-21 주식회사 바이오메카트로닉 Dispositif de nettoyage de type à pulvérisation de glace sèche
US11534891B2 (en) * 2015-05-05 2022-12-27 Corning Incorporated Abrading device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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 (fr) 2013-02-26 2014-09-04 Robert Veit Dispositif et procédé pour la projection de particules au moyen de particules de gaz congelées
US9931639B2 (en) 2014-01-16 2018-04-03 Cold Jet, Llc Blast media fragmenter

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212217A (en) * 1963-05-28 1965-10-19 Tex Tube Inc Cleaning device
US4563840A (en) * 1982-10-11 1986-01-14 Uragami Fukashi Cleaning particle impinging device and air blast cleaning apparatus using said device
US4800688A (en) * 1984-12-05 1989-01-31 Fuji Seiki Machine Works, Ltd. Blasting nozzle for wet blasting machine
US4806171A (en) * 1987-04-22 1989-02-21 The Boc Group, Inc. Apparatus and method for removing minute particles from a substrate
US5165602A (en) * 1990-02-23 1992-11-24 Lair Liquide Process and device for cutting by liquid jet
US5201150A (en) * 1990-07-24 1993-04-13 Fuji Seiki Machine Works, Limited Wet abrasive blasting apparatus using pressurized slurry
US5405283A (en) * 1993-11-08 1995-04-11 Ford Motor Company CO2 cleaning system and method
US5512005A (en) * 1992-08-28 1996-04-30 Michael P. Short Process and apparatus for automatically engraving stone memorial markers
US5599223A (en) * 1991-04-10 1997-02-04 Mains Jr.; Gilbert L. Method for material removal
US5681206A (en) * 1994-03-01 1997-10-28 Mesher; Terry Method of accelerating fluidized particulate matter
US5725154A (en) * 1995-08-18 1998-03-10 Jackson; David P. Dense fluid spray cleaning method and apparatus
US5885133A (en) * 1994-06-20 1999-03-23 Abclean America, Inc. Apparatus and method for cleaning tubular members
US5944581A (en) * 1998-07-13 1999-08-31 Ford Motor Company CO2 cleaning system and method
US6203406B1 (en) * 1994-11-07 2001-03-20 Sumitomo Heavy Industries, Ltd. Aerosol surface processing
US6315639B1 (en) * 1997-12-05 2001-11-13 Jens Werner Kipp Blasting method for cleaning pipes
US20050266777A1 (en) * 2004-05-31 2005-12-01 K.C. Tech Co., Ltd. Nozzle for spraying sublimable solid particles entrained in gas for cleaning surface and method of cleaning surface using the same
US20060079157A1 (en) * 2002-12-31 2006-04-13 Hedser Van Brug Apparatus and method for manufacturing or working optical elements and/or optical forming elements, and such element
US20060089090A1 (en) * 2004-10-21 2006-04-27 S.A. Robotics High pressure cleaning and decontamination system
US20110059681A1 (en) * 2009-09-10 2011-03-10 Bowers Charles W Co2 nozzles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19926119C2 (de) * 1999-06-08 2001-06-07 Fraunhofer Ges Forschung Strahlwerkzeug
WO2003022525A2 (fr) * 2001-09-11 2003-03-20 Jens Werner Kipp Procede et dispositif de decapage
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

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212217A (en) * 1963-05-28 1965-10-19 Tex Tube Inc Cleaning device
US4563840A (en) * 1982-10-11 1986-01-14 Uragami Fukashi Cleaning particle impinging device and air blast cleaning apparatus using said device
US4800688A (en) * 1984-12-05 1989-01-31 Fuji Seiki Machine Works, Ltd. Blasting nozzle for wet blasting machine
US4806171A (en) * 1987-04-22 1989-02-21 The Boc Group, Inc. Apparatus and method for removing minute particles from a substrate
US5165602A (en) * 1990-02-23 1992-11-24 Lair Liquide Process and device for cutting by liquid jet
US5201150A (en) * 1990-07-24 1993-04-13 Fuji Seiki Machine Works, Limited Wet abrasive blasting apparatus using pressurized slurry
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
US5681206A (en) * 1994-03-01 1997-10-28 Mesher; Terry Method of accelerating fluidized particulate matter
US5779523A (en) * 1994-03-01 1998-07-14 Job Industies, Ltd. Apparatus for and method for accelerating fluidized particulate matter
US5885133A (en) * 1994-06-20 1999-03-23 Abclean America, Inc. Apparatus and method for cleaning tubular members
US6203406B1 (en) * 1994-11-07 2001-03-20 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
US6315639B1 (en) * 1997-12-05 2001-11-13 Jens Werner Kipp Blasting method for cleaning pipes
US5944581A (en) * 1998-07-13 1999-08-31 Ford Motor Company CO2 cleaning system and method
US20060079157A1 (en) * 2002-12-31 2006-04-13 Hedser Van Brug Apparatus and method for manufacturing or working optical elements and/or optical forming elements, and such element
US7556554B2 (en) * 2002-12-31 2009-07-07 Nederlandse Organistie voor toegepastnatuurwetenschappelijk Onderzoek TNO Apparatus and method for manufacturing optical objects
US20050266777A1 (en) * 2004-05-31 2005-12-01 K.C. Tech Co., Ltd. Nozzle for spraying sublimable solid particles entrained in gas for cleaning surface and method of cleaning surface using the same
US7442112B2 (en) * 2004-05-31 2008-10-28 K.C. Tech Co., Ltd. Nozzle for spraying sublimable solid particles entrained in gas for cleaning surface
US7762869B2 (en) * 2004-05-31 2010-07-27 K.C. Tech Co., Ltd. Nozzle for spraying sublimable solid particles entrained in gas for cleaning surface
US20060089090A1 (en) * 2004-10-21 2006-04-27 S.A. Robotics High pressure cleaning and decontamination system
US20110059681A1 (en) * 2009-09-10 2011-03-10 Bowers Charles W Co2 nozzles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11534891B2 (en) * 2015-05-05 2022-12-27 Corning Incorporated Abrading device
WO2021210845A1 (fr) * 2020-04-17 2021-10-21 주식회사 바이오메카트로닉 Dispositif de nettoyage de type à pulvérisation de glace sèche

Also Published As

Publication number Publication date
DE102007018338A1 (de) 2008-10-16
WO2008125648A1 (fr) 2008-10-23
EP2136965B1 (fr) 2012-06-20
EP2136965A1 (fr) 2009-12-30
DE102007018338B4 (de) 2010-09-23

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Owner name: TECHNISCHE UNIVERSITAT BERLIN, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VEIT, ROBERT;UHLMANN, ECKART;SIGNING DATES FROM 20091118 TO 20091126;REEL/FRAME:024081/0816

STCB Information on status: application discontinuation

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