WO2007147192A2 - Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl - Google Patents
Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl Download PDFInfo
- Publication number
- WO2007147192A2 WO2007147192A2 PCT/AT2007/000307 AT2007000307W WO2007147192A2 WO 2007147192 A2 WO2007147192 A2 WO 2007147192A2 AT 2007000307 W AT2007000307 W AT 2007000307W WO 2007147192 A2 WO2007147192 A2 WO 2007147192A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- gaseous medium
- nozzle
- pressure
- bar
- 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.)
- Ceased
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0084—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/364—By fluid blast and/or suction
Definitions
- the invention relates to a device and a method for processing a solid material with a water jet emerging from a nozzle, which contains ice crystals and impinges on the solid material.
- Water or air jets are used in a variety of ways to process various materials.
- the jet is usually expanded through a narrow die to normal pressure and used for surface removal such as e.g. Rough cleaning, polishing, burring / deburring, removal of coatings / decoating, paint cleaning etc. or used for cutting or drilling materials or workpieces.
- surface removal such as e.g. Rough cleaning, polishing, burring / deburring, removal of coatings / decoating, paint cleaning etc. or used for cutting or drilling materials or workpieces.
- artistic activities such as "negative graffiti", ie drawing by deliberate detachment of color through the thin stream of water or air, are possible.
- Examples of known devices for material processing can be found, for example, in DE 198 49 814 A1 and in DE 198 49 813 A1 with the introduction of an abrasive material.
- DE 10 2004 046 030 Al a method and an apparatus for cutting a web is known, wherein ice crystals are formed in the water jet. The formation of the ice crystals can be assisted by adding carbon dioxide to the water in the high-pressure area in front of the nozzle, which evaporates after it leaves, whereby the heat of vaporization of the carbon dioxide extracts energy from the water.
- the known methods and devices for cutting or drilling material processing are only suitable for the processing of soft materials.
- Hard materials such as steel can only be abraded, that is, the jet of water must contain solid particles such as sand, corundum or similar abrasives.
- the workpieces can be contaminated by the abrasive material when, for example, sand remains on the surface or in cracks and laboriously needs to be removed again.
- the object of the invention is thus to provide a method and an apparatus for processing a solid material with a water jet, which offers a simple and cost-effective way to form ice crystals in the water jet after the exit of the water jet from the nozzle.
- the method for processing a solid material with a jet of water emerging from a nozzle, which contains ice crystals and impinges on the solid material characterized in that a gaseous medium under standard conditions at a pressure of 1-150 bar, preferably in a mixing stage, is dissolved in the water.
- a gaseous medium under standard conditions at a pressure of 1-150 bar preferably in a mixing stage
- the solution in a high pressure stage e.g. a commercial water jet cutting machine, compressed to 1000-4500 bar and pressed through a nozzle under conditions that cause segregation of the water and the dissolved medium after leaving the nozzle, the heat of the solution is removed from the water and ice crystals are formed.
- the dissolution of the gaseous medium in the water in a simple and cost-effective manner in the mixing stage by passing the gaseous medium from gas cylinders or pressure cartridges under pressure through the water.
- Another advantage is that a tuning of the solution concentration of the gaseous medium and a pre-cooling of the water controls the particle fraction and the particle size of the ice crystals formed in the water jet, as this allows a simple adaptation of the physical properties of the water jet to the material to be processed. It is particularly advantageous that the gaseous medium is carbon dioxide, since this is easy and inexpensive to produce and especially useful in the food industry.
- a preferred embodiment of a device for processing a solid material with a water jet emerging from a nozzle, which contains ice crystals and impinges on the solid material a supply line with an inlet valve and a pump for water in a mixing area, in which a pressure of 1 -150 bar prevails, connected to the mixing area via a high-pressure pump high-pressure tank and a nozzle connected to the container, wherein in the fed via the supply line in the mixing area water in the mixing area, a gaseous medium under pressure can be supplied and dissolved in the water, since this embodiment is a simple and inexpensive way to dissolve a gas in water.
- the gaseous medium can be introduced into the water via a shower device arranged in the mixing area, wherein the shower device is designed in particular in the form of a shower head with a plurality of outlet openings, since this enables a uniform distribution of the gaseous medium over a large volume ,
- the gaseous medium inflow side of the mixing region under a pressure of 1-150 bar introduced into the water, whereby additional devices for introducing the gaseous medium into the water are inexpensively avoided.
- An advantageous embodiment variant provides that the gaseous medium is present in the mixing region under a pressure of 1-150 bar and the water is supplied by atomization, since this allows a very homogeneous mixing.
- gaseous medium can be introduced into the water via dry ice pellets containing the gaseous medium and the gaseous medium can be released under pressure in the water, as this avoids tank devices and feed lines for the gaseous medium can.
- gaseous medium is fed to a mixing stage for mixing with the water in a medium pressure range (1-150 bar). This is what it is in easy way possible to use commercially available storage containers for gaseous media, in particular in the form of a gas cylinder or gas cartridge.
- the mixing area is connected to a return line, via which excess gaseous medium can be fed back into the supply line, as this allows excess gaseous medium to be recycled.
- the water is forced through the nozzle under a pressure of 1000-4500 bar, since this allows a large jump in temperature upon expansion of the water jet to normal pressure and thus the reliable formation of ice crystals.
- FIG. 1 is a highly schematic view of a preferred embodiment of an inventively designed device for processing a solid material with a water jet
- FIGS. 2A-D show four exemplary embodiments of mixing regions of the device according to the invention according to FIG. 1.
- abrasive material to the jet of water is necessary for working solid materials, if harder materials or surfaces are to be processed, whereby preferably sand is used, which, however, has a number of disadvantages.
- Sand and other solid abrasive materials remain on the treated material and must be removed.
- a major advantage of using ice crystals instead of sand as abrasive material is the prevention of contamination. The ice crystals melt after processing, and the remaining water can be removed, for example, by simple drying, whereby the treated material remains clean throughout the process.
- the use represents an environmental advantage, since there is no sand waste, which must be eliminated or recycled.
- a staggered with ice crystals as Abrasivmaterial water jet can therefore be used without hesitation in the industries of electronics, (bio) medicine, food, car paints, space, etc. Also, the costs are lower, because ice unlike others Abrasive materials such as sand need not be delivered and stored, but can be made, for example, from the tap water by using electricity.
- nucleators can be added in principle. These are solid organic or inorganic substances that are germs for ice crystal growth. However, the use of nucleators, which must be continuously fed through an intake manifold, again brings the problem of poor environmental compatibility with it, whereby a use in the food industry is no longer possible.
- the cooling of the water and thus the production of ice particles in the water jet can be achieved by dissolving a gaseous medium, for example carbon dioxide, in a water-mixing device at a pressure of 1-150 bar and then releasing the water Mixture is fed by means of a high-pressure pump to a nozzle. Due to the pressure drop after the nozzle segregation occurs. The release of the gaseous medium extracts from the water, in addition to the cooling by expansion, the heat of solution of the gaseous medium, so that it comes after the nozzle to spontaneous cooling and the formation of ice crystals in the water jet.
- a gaseous medium for example carbon dioxide
- the cooling achieved in this way is in the range of several degrees Celsius, so that a much lower cost must be invested in the ICühler the device. Also, the problems of wear of the nozzle and its constipation can be bypassed.
- the described approach is possible in principle with a variety of gaseous media, since many gases are very soluble in water. by virtue of the possibility of using carbon dioxide (CO 2 ) in the drinking water industry or due to the comprehensive knowledge of the physical and chemical properties such as solubility in water and heat of dissolution, the invention is described in more detail below using the example of CO 2 .
- CO 2 carbon dioxide
- Fig. 1 shows a highly schematic view of an embodiment of a device 1 for processing solid materials by means of a water jet 2, preferably a high-pressure water jet, which contains a gas admixture.
- the device 1 essentially comprises a mixing region 3 in which the water and a gaseous medium, in the exemplary embodiment carbon dioxide, are mixed with one another.
- the water is introduced under low pressure (i.e., for example, operating pressure of the water supply network) via a supply line 4 with an inlet valve 5 and a pump 6 in the mixing region 3.
- the carbon dioxide is introduced, for example, via a shower device 7 from a tank 8, for example a gas cylinder, via a feed line 9 into the mixing area 3.
- the shower device 7 is formed, for example, in the form of a shower head with a plurality of outflow openings, through which the gaseous medium flows into the water located in the mixing region 3.
- a return line 10 with a further pump 6 allows the return of excess gaseous medium in the supply line 9.
- the pressure in the mixing region 3 is approximately 200 bar, which is referred to below as the medium pressure.
- the formation of the ice crystals takes place only after the nozzle 13.
- the crystallization is excited by the expansion or by the atomization of the water jet 2, which leads to a sudden bubbling to release the dissolved carbon dioxide from the now supersaturated water-gas solution.
- a solution amount of heat of -20.54 kJ / mol is thereby removed from the water.
- problems such as clogging, wear or overheating of the nozzle 13 can be prevented.
- An appropriate vote of CO 2 solution concentration and precooling allows control of the particle fraction and the particle size in the water jet 2, so that it can be adapted to the particular requirements of the material to be processed 14, for example, with many large ice crystals for fast, rather coarse cleaning large areas or with many small ice crystals for polishing a surface. Even hard materials 14 can be processed cleanly.
- the admixing of the carbon dioxide in the mixing zone 3 can, as shown schematically in FIGS. 2A to 2D, take place directly in the mixing zone 3, as already shown in FIG. 1 and shown enlarged in FIG. 2A.
- the water is first mixed with carbon dioxide by dissolving the CO 2 in the water, for example by passing CO 2 from the tank 8, which is formed in the embodiment shown in FIG. 1 as a gas cylinder.
- the process of dissolving carbon dioxide in water can be controlled by monitoring the pH via a suitable sensor, since due to the reaction equilibrium of CO 2 / H 2 O with HCO 3 VH + saturated solutions with CO 2 are acidic; For example, a pH of 3.9 is present at 298K.
- the temperature of the device 1 rises slightly by the heat of dissolution of the carbon dioxide, so that a heat dissipation in the mixing region 3 is indicated for example by a water cooling.
- the water jet 2 is produced by the water-carbon dioxide mixture pumped by the pump 1 1, which must be designed suitable for high pressure, in the container 12 and then forwarded to the nozzle 13 and is pressed through it.
- the pump 1 1 For existing pumps 11 and nozzles 13 can be used without further technical modifications. There must be no additional materials supplied from the outside, so it is no additional intake manifold necessary.
- nco2 the molar mass of water
- ⁇ H -20.54 kJ / mol
- the released carbon dioxide can be recycled or extracted if necessary. However, it must be ensured that the addition of carbon dioxide to the ambient air is not too high, otherwise there is danger of suffocation, such as through ventilation or correspondingly large spaces.
- the invention is not limited to the illustrated embodiment, but for example, with other gaseous media feasible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009515671A JP2009541067A (ja) | 2006-06-23 | 2007-06-22 | ウォータージェットを用いて固体材料を加工するための装置及び方法 |
| AT07763719T ATE485130T1 (de) | 2006-06-23 | 2007-06-22 | Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl |
| US12/305,741 US20100024619A1 (en) | 2006-06-23 | 2007-06-22 | Device and method for machining a solid material using a water jet |
| EP20070763719 EP2032309B1 (de) | 2006-06-23 | 2007-06-22 | Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl |
| DE200750005423 DE502007005423D1 (de) | 2006-06-23 | 2007-06-22 | Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA1066/2006 | 2006-06-23 | ||
| ATA1066/2006A AT503825B1 (de) | 2006-06-23 | 2006-06-23 | Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2007147192A2 true WO2007147192A2 (de) | 2007-12-27 |
| WO2007147192A3 WO2007147192A3 (de) | 2008-04-17 |
Family
ID=38434853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT2007/000307 Ceased WO2007147192A2 (de) | 2006-06-23 | 2007-06-22 | Vorrichtung und verfahren zur bearbeitung eines festen werkstoffs mit einem wasserstrahl |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20100024619A1 (de) |
| EP (1) | EP2032309B1 (de) |
| JP (1) | JP2009541067A (de) |
| AT (2) | AT503825B1 (de) |
| DE (1) | DE502007005423D1 (de) |
| WO (1) | WO2007147192A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116038578A (zh) * | 2023-03-31 | 2023-05-02 | 北京科技大学 | 一种表面处理装置及表面处理方法 |
Family Cites Families (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2809817A (en) * | 1953-07-13 | 1957-10-15 | Munters Carl Georg | Apparatus for effecting physical interaction between a gaseous and a liquid medium |
| US3552417A (en) * | 1968-11-13 | 1971-01-05 | Casper M Goff | Pump construction |
| DE1809677A1 (de) * | 1968-11-19 | 1970-05-21 | Woma Appbau W Maasberg & Co Gm | Strahlduese fuer Hochdruck-Strahleinrichtungen |
| US4341530A (en) * | 1979-12-05 | 1982-07-27 | The United States Of America As Represented By The Department Of Energy | Slurry atomizer for a coal-feeder and dryer used to provide coal at gasifier pressure |
| US4829859A (en) * | 1986-08-29 | 1989-05-16 | Ulticon Systems, Inc. | Method of high speed machining |
| US4877500A (en) * | 1988-06-30 | 1989-10-31 | Joseph Callerame | Process for the production of chlorine dioxide |
| US5018667A (en) * | 1989-02-08 | 1991-05-28 | Cold Jet, Inc. | Phase change injection nozzle |
| US5009240A (en) * | 1989-07-07 | 1991-04-23 | United States Of America | Wafer cleaning method |
| US5365699A (en) * | 1990-09-27 | 1994-11-22 | Jay Armstrong | Blast cleaning system |
| US5184427A (en) * | 1990-09-27 | 1993-02-09 | James R. Becker | Blast cleaning system |
| US5222332A (en) * | 1991-04-10 | 1993-06-29 | Mains Jr Gilbert L | Method for material removal |
| US5599223A (en) * | 1991-04-10 | 1997-02-04 | Mains Jr.; Gilbert L. | Method for material removal |
| EP0539055B1 (de) * | 1991-10-09 | 1997-03-12 | Toyota Jidosha Kabushiki Kaisha | Verfahren und Vorrichtung zur Bearbeitung eines Werkstückes, durch Anwendung einer geschäumten Bearbeitungsflüssigkeit in dem Kontaktbereich zwischen dem Werkstück und Werkzeug |
| US5445553A (en) * | 1993-01-22 | 1995-08-29 | The Corporation Of Mercer University | Method and system for cleaning a surface with CO2 pellets that are delivered through a temperature controlled conduit |
| DE4320410A1 (de) * | 1993-06-21 | 1994-12-22 | Ghibli Hochdruck Ag | Verfahren und Vorrichtung zum Reinigen von Oberflächen |
| US5390450A (en) * | 1993-11-08 | 1995-02-21 | Ford Motor Company | Supersonic exhaust nozzle having reduced noise levels for CO2 cleaning system |
| US5514024A (en) * | 1993-11-08 | 1996-05-07 | Ford Motor Company | Nozzle for enhanced mixing in CO2 cleaning system |
| US5405283A (en) * | 1993-11-08 | 1995-04-11 | Ford Motor Company | CO2 cleaning system and method |
| US5785581A (en) * | 1995-10-19 | 1998-07-28 | The Penn State Research Foundation | Supersonic abrasive iceblasting apparatus |
| US6082631A (en) * | 1997-03-21 | 2000-07-04 | Graffiti Gone Inc. | Trailer mounted graffiti removal system |
| US6892961B1 (en) * | 1999-09-16 | 2005-05-17 | Graco Minnesota Inc. | Plural component material mixer |
| SE515491C2 (sv) * | 1999-12-27 | 2001-08-13 | Electrolux Ab | Förfarande och anordning för rengörning av porösa material medelst koldioxid |
| US6203623B1 (en) * | 1999-12-28 | 2001-03-20 | Ball Semiconductor, Inc. | Aerosol assisted chemical cleaning method |
| US6273345B1 (en) * | 2000-02-11 | 2001-08-14 | United States Gypsum Company | High performance slurry spray machine |
| US6719613B2 (en) * | 2000-08-10 | 2004-04-13 | Nanoclean Technologies, Inc. | Methods for cleaning surfaces substantially free of contaminants utilizing filtered carbon dioxide |
| US7451941B2 (en) * | 2001-03-13 | 2008-11-18 | Jackson David P | Dense fluid spray cleaning process and apparatus |
| JP3753422B2 (ja) * | 2001-03-27 | 2006-03-08 | 日本パーカライジング株式会社 | 粉体塗料供給装置及び方法 |
| CN1272595C (zh) * | 2001-04-19 | 2006-08-30 | 斯诺工厂股份有限公司 | 制雪方法和装置 |
| JP2006525869A (ja) * | 2003-04-11 | 2006-11-16 | グレート スタッフ インコーポレイテッド | 空気/液体のための流体制御システム |
| FI20031365L (fi) * | 2003-09-22 | 2005-03-23 | Metso Paper Inc | Menetelmä ja laitteisto rainan leikkaamiseksi |
| US7040962B2 (en) * | 2003-11-19 | 2006-05-09 | Fuji Seiki Machine Works, Ltd. | Ice blasting apparatus and trimming method for film insert molding |
| US7293570B2 (en) * | 2004-12-13 | 2007-11-13 | Cool Clean Technologies, Inc. | Carbon dioxide snow apparatus |
| DE102005005638B3 (de) * | 2005-02-05 | 2006-02-09 | Cryosnow Gmbh | Verfahren und Vorrichtung zum Reinigen, Aktivieren oder Vorbehandeln von Werkstücken mittels Kohlendioxidschnee-Strahlen |
| US20070178811A1 (en) * | 2006-02-01 | 2007-08-02 | Meenakshi Sundaram | Dry ice blasting with chemical additives |
-
2006
- 2006-06-23 AT ATA1066/2006A patent/AT503825B1/de not_active IP Right Cessation
-
2007
- 2007-06-22 WO PCT/AT2007/000307 patent/WO2007147192A2/de not_active Ceased
- 2007-06-22 AT AT07763719T patent/ATE485130T1/de active
- 2007-06-22 DE DE200750005423 patent/DE502007005423D1/de active Active
- 2007-06-22 US US12/305,741 patent/US20100024619A1/en not_active Abandoned
- 2007-06-22 JP JP2009515671A patent/JP2009541067A/ja active Pending
- 2007-06-22 EP EP20070763719 patent/EP2032309B1/de not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| AT503825A1 (de) | 2008-01-15 |
| ATE485130T1 (de) | 2010-11-15 |
| EP2032309B1 (de) | 2010-10-20 |
| EP2032309A2 (de) | 2009-03-11 |
| DE502007005423D1 (de) | 2010-12-02 |
| JP2009541067A (ja) | 2009-11-26 |
| WO2007147192A3 (de) | 2008-04-17 |
| US20100024619A1 (en) | 2010-02-04 |
| AT503825B1 (de) | 2012-04-15 |
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