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)

Applications Claiming Priority (4)

Publications (1)

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Family Applications (1)

Country Status (1)

Citations (8)

• 2001
  • 2001-08-21 EP EP01120140A patent/EP1188519A1/fr not_active Withdrawn

Patent Citations (8)

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