EP1188519A1 - Method and device for blasting with blasting medium - Google Patents
Method and device for blasting with blasting medium Download PDFInfo
- Publication number
- EP1188519A1 EP1188519A1 EP01120140A EP01120140A EP1188519A1 EP 1188519 A1 EP1188519 A1 EP 1188519A1 EP 01120140 A EP01120140 A EP 01120140A EP 01120140 A EP01120140 A EP 01120140A EP 1188519 A1 EP1188519 A1 EP 1188519A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blasting
- water
- workpiece
- gas stream
- cooling
- 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.)
- Withdrawn
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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 a method for irradiating a workpiece with under Normal conditions in a solid state of abrasive, the Blasting media dosed into a conveying gas stream in a blasting system, with the conveying gas stream conveyed to a blasting device and onto the workpiece to be machined be blasted.
- the invention further relates to a device for irradiating a workpiece with under normal conditions in a solid state of abrasive comprising a blasting system with means for metering the blasting media into one Conveying gas flow, a blasting hose that goes from the blasting system to a blasting device leads from which the blasting medium is blasted onto the workpiece to be machined become
- Abrasives have been known for a long time and are used for numerous applications used. Blasting with these conventional abrasives shows usually a much higher abrasiveness than exposure to some Time also known blasting media available in normal form in fluid form such as dry ice.
- Conventional abrasives include for example quartz sand (sandblasting), but also steel gravel, hard cusk, wire com, Corundum or other inorganic or organic abrasives or abrasives plant-based.
- the present invention is therefore based on the object of a method and a Show device of the type mentioned, which an effective dust binding show in a simple way.
- the invention is based on the idea of cooling in addition to adding water To be able to reduce the amount of water required and still or thereby one to achieve effective dust binding.
- the cooling means in particular in the jet directed towards the workpiece dust-binding condensate droplets are generated. Because by the cold of the Blasting device emerging at least from cold conveying gas, water and blasting media existing beam spontaneously forms a fog. This creates the condensate droplets, with the help of which dust binding is effectively supported can.
- the feed gas stream is cooled by adding liquefied gases.
- liquefied gases is understood to mean a liquefied gas or a mixture of several liquefied gases.
- all suitable gases can be used for the invention.
- Liquefied nitrogen (LIN), liquefied carbon dioxide (LCO 2 ) or liquefied synthetic air are used with advantage.
- the use of liquefied synthetic air enables treatment even in heavy rooms without heavy breathing protection (e.g. filter protection is sufficient).
- water can be added at least partially in the form of water ice become. This is done in a suitable apparatus using a refrigerant Water ice is formed from water and into the blasting hose for the blasting medium and entered the production gas. This ice - in a solid state up to the blasting device directed - becomes liquid and when impacted on the surface to be processed thus forms the fine water droplets necessary for dust absorption.
- the Media quantities should be coordinated so that no disturbing wetting of the Surface takes place.
- the means of adding water in the form of water ice are preferred between the Blasting system and the blasting device, particularly preferred to avoid Cold losses in the blasting hose are closer to the blasting device than to the blasting system arranged.
- Water in liquid form can be added at least partially.
- the Water addition in liquid form can in particular be used as an alternative to the addition of Water ice.
- the media required to apply the invention are regarding to adjust their amount so that undesired wetting of the workpiece surface can be avoided if possible.
- a blasting gun can be used as the blasting device.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Bestrahlen eines Werkstücks mit unter Normalbedingungen in festem Aggregatzustand vorliegenden Strahlmitteln, wobei die Strahlmittel in einer Strahlanlage in einen Fördergasstrom eindosiert, mit dem Fördergasstrom zu einer Strahlvorrichtung gefördert und auf das zu bearbeitende Werkstück gestrahlt werden.The invention relates to a method for irradiating a workpiece with under Normal conditions in a solid state of abrasive, the Blasting media dosed into a conveying gas stream in a blasting system, with the conveying gas stream conveyed to a blasting device and onto the workpiece to be machined be blasted.
Die Erfindung betrifft femer eine Vorrichtung zum Bestrahlen eines Werkstücks mit unter Normalbedingungen in festem Aggregatzustand vorliegenden Strahlmitteln umfassend eine Strahlanlage mit Mitteln zum Eindosieren der Strahlmittel in einen Fördergasstrom, einen Strahlschlauch, der von der Strahlanlage zu einer Strahlvorrichtung führt, aus welcher die Strahlmittel auf das zu bearbeitende Werkstück gestrahlt werdenThe invention further relates to a device for irradiating a workpiece with under normal conditions in a solid state of abrasive comprising a blasting system with means for metering the blasting media into one Conveying gas flow, a blasting hose that goes from the blasting system to a blasting device leads from which the blasting medium is blasted onto the workpiece to be machined become
Das Bestrahlen von Werkstücken mit unter Normalbedingungen partikelförmig vorliegenden Strahlmitteln ist seit langem bekannt und wird für zahlreiche Anwendungsfälle eingesetzt. Eine Strahlbearbeitung mit diesen konventionellen Strahlmitteln weist in der Regel eine wesentlich höhere Abrasivität auf als ein Bestrahlen mit seit einiger Zeit auch bekannten, bei Normalbedingungen in fluider Form vorliegenden Strahlmitteln wie beispielsweise Trockeneis. Zu den konventionellen Strahlmitteln zählen beispielsweise Quarzsand (Sandstrahlen), aber auch Stahlkies, Hartguskies, Drahtkom, Korund oder andere anorganische oder organische Strahlmittel oder Strahlmittel auf pflanzlicher Basis.Irradiation of workpieces with particles present under normal conditions Abrasives have been known for a long time and are used for numerous applications used. Blasting with these conventional abrasives shows usually a much higher abrasiveness than exposure to some Time also known blasting media available in normal form in fluid form such as dry ice. Conventional abrasives include for example quartz sand (sandblasting), but also steel gravel, hard cusk, wire com, Corundum or other inorganic or organic abrasives or abrasives plant-based.
Mit der Strahlbehandlung unter Einsatz von herkömmlichen, abrasiven Strahlmitteln geht üblicherweise eine starke Staubentwicklung einher. Der Staub wird durch die abprallenden Strahlmitteln und das abgestrahlte Material hervorgerufen. Diese starke Staubentwicklung ist in der Regel sehr unerwünscht.With blasting treatment using conventional, abrasive blasting agents there is usually a lot of dust. The dust gets through the bouncing abrasives and the blasted material. This strong Dust is usually very undesirable.
Neben den trockenen Abrasivstrahlbehandlungen gibt es auch nasse Strahlbehandlungen mit herkömmlichen Abrasivstrahlmitteln unter Zugabe von Wasser. Durch diese Zugabe von Wasser erreicht man zwar in der Regel eine Staubbindung, allerdings wird der Effekt der Staubbindung mit großen Abwassermengen erkauft, die aufwendig gefaßt und entsorgt werden müssen.In addition to the dry abrasive blasting treatments, there are also wet blasting treatments with conventional abrasive abrasives with the addition of water. Through this Adding water usually achieves dust binding, but will bought the effect of dust binding with large amounts of wastewater, which is expensive must be caught and disposed of.
Die Staubbindung in den nassen Strahlbehandlungen ist aufgrund der großen Abwassermengen mit gravierenden Nachteilen verbunden.The dust binding in wet blasting treatments is due to the large Waste water quantities associated with serious disadvantages.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde ein Verfahren und eine Vorrichtung der eingangs genannten Art aufzuzeigen, welche eine effektive Staubbindung auf einfache Art und Weise zeigen.The present invention is therefore based on the object of a method and a Show device of the type mentioned, which an effective dust binding show in a simple way.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale der unabhängigen Ansprüche gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen sind Gegenstand der Unteransprüche.This object is achieved by the features of the independent claims solved. Advantageous refinements and developments are the subject of Dependent claims.
Die Erfindung basiert auf der Idee, durch Kühlung zusätzlich zur Zugabe von Wasser die benötigte Wassermenge verringern zu können und dennoch bzw. dadurch eine effektive Staubbindung zu erreichen.The invention is based on the idea of cooling in addition to adding water To be able to reduce the amount of water required and still or thereby one to achieve effective dust binding.
Durch die Kühlung können insbesondere im zum Werkstück hin gerichteten Strahl staubbindende Kondensattröpfchen erzeugt werden. Denn durch die Kälte des aus der Strahlvorrichtung austretenden zumindest aus kaltem Fördergas, Wasser und Strahlmitteln bestehenden Strahls kommt es spontan zu einer Nebelbildung. Dabei entstehen die Kondensattröpfchen, mit deren Hilfe eine Staubbindung wirksam unterstützt werden kann.The cooling means in particular in the jet directed towards the workpiece dust-binding condensate droplets are generated. Because by the cold of the Blasting device emerging at least from cold conveying gas, water and blasting media existing beam spontaneously forms a fog. This creates the condensate droplets, with the help of which dust binding is effectively supported can.
In Weiterbildung der Erfindung wird der Fördergasstrom durch Zugabe von verflüssigten Gasen gekühlt. Unter 'verflüssigten Gasen' wird im Rahmen der Erfindung ein verflüssigtes Gas oder ein Gemisch aus mehreren verflüssigten Gasen verstanden. Grundsätzlich können für die Erfindung alle geeigneten Gase verwendet werden. Mit Vorteil werden verflüssigter Stickstoff (LIN), verflüssigtes Kohlendioxid (LCO2) oder verflüssigte synthetische Luft eingesetzt. Durch den Einsatz von verflüssigter synthetischer Luft wird beispielsweise in engen Räumen eine Behandlung auch ohne schweren Atemschutz (z.B. ist Filterschutz ausreichend) ermöglicht. In a further development of the invention, the feed gas stream is cooled by adding liquefied gases. In the context of the invention, “liquefied gases” is understood to mean a liquefied gas or a mixture of several liquefied gases. In principle, all suitable gases can be used for the invention. Liquefied nitrogen (LIN), liquefied carbon dioxide (LCO 2 ) or liquefied synthetic air are used with advantage. The use of liquefied synthetic air enables treatment even in heavy rooms without heavy breathing protection (e.g. filter protection is sufficient).
Erfindungsgemäß kann Wasser zumindest teilweise in Form von Wassereis zugegeben werden. Dazu wird in einer geeigneten Apparatur unter Einsatz eines Kältemittels aus Wasser Wassereis gebildet und in den Strahlschlauch für das Strahlmittel und das Fördergas eingetragen. Dieses Eis - in festem Zustand bis zur Strahlvorrichtung geleitet - wird beim Aufprall auf die zu bearbeitende Oberfläche flüssig und bildet damit die für die Staubabsorbierung notwendigen feinen Wassertröpfchen. Die Medienmengen sollten dabei so abgestimmt sein, dass keine störende Benetzung der Oberfläche stattfindet.According to the invention, water can be added at least partially in the form of water ice become. This is done in a suitable apparatus using a refrigerant Water ice is formed from water and into the blasting hose for the blasting medium and entered the production gas. This ice - in a solid state up to the blasting device directed - becomes liquid and when impacted on the surface to be processed thus forms the fine water droplets necessary for dust absorption. The Media quantities should be coordinated so that no disturbing wetting of the Surface takes place.
Die Mittel zur Zugabe von Wasser in Form von Wassereis sind bevorzugt zwischen der Strahlanlage und der Strahlvorrichtung, besonders bevorzugt zur Vermeidung von Kälteverlusten im Strahlschlauch näher an der Strahlvorrichtung als an der Strahlanlage angeordnet.The means of adding water in the form of water ice are preferred between the Blasting system and the blasting device, particularly preferred to avoid Cold losses in the blasting hose are closer to the blasting device than to the blasting system arranged.
Ergänzend, aber auch alternativ zu der Zugabe von Wasser in Form von Wassereis kann eine Kühlung durch weitere Kältemittel erfolgen. Bei der ersten Möglichkeit kann die Kühlung - beispielsweise um Kälteverluste zu kompensieren - durch weitere Kältemittel
- zwischen der Zugabestelle des Wassereises in den Fördergasstrom,
- in der Strahlvorrichtung und/oder
- auf der bestrahlten Oberfläche des Werkstückes
- between the point of addition of the water ice into the gas flow,
- in the blasting device and / or
- on the irradiated surface of the workpiece
Es kann zumindest teilweise Wasser in flüssiger Form zugegeben werden. Die Wasserzugabe in flüssiger Form kann insbesondere allternativ zur Zugabe von Wassereis erfolgen.Water in liquid form can be added at least partially. The Water addition in liquid form can in particular be used as an alternative to the addition of Water ice.
Das für die Staubbindung notwendige Wasser in flüssiger Form wird bevorzugt
- in der Strahlvorrichtung oder
- in ein werkstückseitig zur Strahlvorrichtung angeordnetes Mischrohr in den gekühlten Fördergasstrom
- in the blasting device or
- in a mixing tube arranged on the workpiece side to the blasting device into the cooled conveying gas stream
Auch hier sind die bei der Anwendung der Erfindung erforderlichen Medien hinsichtlich ihrer Menge so abzustimmen, dass eine unerwünschte Benetzung der Werkstückoberfläche möglichst vermieden werden kann.Again, the media required to apply the invention are regarding to adjust their amount so that undesired wetting of the workpiece surface can be avoided if possible.
Als Strahlvorrichtung kann insbesondere eine Strahlpistole eingesetzt werden.In particular, a blasting gun can be used as the blasting device.
Claims (14)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10041871 | 2000-08-25 | ||
DE10041871 | 2000-08-25 | ||
DE10108063A DE10108063A1 (en) | 2000-08-25 | 2001-02-20 | Method and appliance of abrasion for workpieces involve appliance with dispenser for abrasive agent into current of carrier-gas, with hose and abrasive piece. |
DE10108063 | 2001-02-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1188519A1 true EP1188519A1 (en) | 2002-03-20 |
Family
ID=26006817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01120140A Withdrawn EP1188519A1 (en) | 2000-08-25 | 2001-08-21 | Method and device for blasting with blasting medium |
Country Status (1)
Country | Link |
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EP (1) | EP1188519A1 (en) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2990653A (en) * | 1958-04-21 | 1961-07-04 | G H Temant Company | Method and apparatus for impacting a stream at high velocity against a surface to be treated |
DE3617692A1 (en) * | 1986-05-26 | 1987-12-03 | Klaus Fertl | Device in sandblasting conduits |
US4965968A (en) * | 1985-03-02 | 1990-10-30 | Kue Engineering Limited | Blast cleaning |
WO1993009915A1 (en) * | 1991-11-19 | 1993-05-27 | Church & Dwight Company, Inc. | Blasting apparatus and method |
US5318636A (en) * | 1991-04-19 | 1994-06-07 | Eva Abony Szucs | Method for cleaning surfaces, in particular sensitive surfaces |
US5407379A (en) * | 1994-04-18 | 1995-04-18 | Church & Dwight Co., Inc. | Differential pressure metering and dispensing system for abrasive media |
US5591064A (en) * | 1995-06-30 | 1997-01-07 | Church & Dwight Co., Inc. | Blasting apparatus and method for blast cleaning a solid surface |
EP1034890A2 (en) * | 1999-03-05 | 2000-09-13 | Linde Technische Gase GmbH | Method and device for blasting with different types of blasting medium |
-
2001
- 2001-08-21 EP EP01120140A patent/EP1188519A1/en not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2990653A (en) * | 1958-04-21 | 1961-07-04 | G H Temant Company | Method and apparatus for impacting a stream at high velocity against a surface to be treated |
US4965968A (en) * | 1985-03-02 | 1990-10-30 | Kue Engineering Limited | Blast cleaning |
DE3617692A1 (en) * | 1986-05-26 | 1987-12-03 | Klaus Fertl | Device in sandblasting conduits |
US5318636A (en) * | 1991-04-19 | 1994-06-07 | Eva Abony Szucs | Method for cleaning surfaces, in particular sensitive surfaces |
WO1993009915A1 (en) * | 1991-11-19 | 1993-05-27 | Church & Dwight Company, Inc. | Blasting apparatus and method |
US5407379A (en) * | 1994-04-18 | 1995-04-18 | Church & Dwight Co., Inc. | Differential pressure metering and dispensing system for abrasive media |
US5591064A (en) * | 1995-06-30 | 1997-01-07 | Church & Dwight Co., Inc. | Blasting apparatus and method for blast cleaning a solid surface |
EP1034890A2 (en) * | 1999-03-05 | 2000-09-13 | Linde Technische Gase GmbH | Method and device for blasting with different types of blasting medium |
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