DEVICE AND METHOD FOR CLEANING, ACTIVATING OR PRE-TREATING WORKPIECES BY BLASTING CARBON DIOXIDE SNOW

摘要

The invention relates to a device and method for cleaning, activating or pre-treating workpieces by blasting a carbon dioxide snow which is produced frompressurised CO2-containing fluids and at least one type of carrying compressedgas and is accelerated by means of a discharge nozzle (14), wherein a two-phase carbon dioxide mixture of a carbon dioxide gas and carbon dioxideparticles is produced in an agglomeration chamber (8) by agglomerating andcompressing carbon dioxide snow crystals which are radially added to thecarrying gas in a multistage mixing chamber (10, 11, 12) comprising a centraljet pipe (4), around which the carbon dioxide mixture circulates and which isused for supplying said carrying gas in such a manner that a high-energyturbulent gas flow for processing a workpiece is obtainable.