Device and process for cleaning, activation or pretreatment of work pieces by means of carbon dioxide blasting
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United States of America Patent
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Jun 28, 2011
Grant Date -
Apr 24, 2008
app pub date -
Nov 28, 2005
filing date -
Feb 5, 2005
priority date (Note) -
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Abstract
The invention relates to a device and method for cleaning, activating or pre-treating workpieces by blasting a carbon dioxide snow which is produced from pressurized CO.sub.2-containing fluids and at least one type of carrying compressed gas and is accelerated by means of a discharge nozzle (14), wherein a two-phase carbon dioxide mixture of a carbon dioxide gas and carbon dioxide particles is produced in an agglomeration chamber (8) by agglomerating and compressing carbon dioxide snow crystals which are radially added to the carrying gas in a multistage mixing chamber (10, 11, 12) comprising a central jet pipe (4), around which the carbon dioxide mixture circulates and which is used for supplying said carrying gas in such a manner that a high-energy turbulent gas flow for processing a workpiece is obtainable.
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