Device and process for cleaning, activation or pretreatment...

Details Device and process for cleaning, activation or pretreatment... Device and process for cleaning, activation or pretreatment...

2011-06-28

2011-06-28

Eley, Timothy V (Department: 3724)

Abrading

Machine

Sandblast

C134S094100, C134S095100, C451S099000, C451S102000

Reexamination Certificate

active

07967664

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 CO2-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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