B - Operations – Transporting – 24 – C
Patent
B - Operations, Transporting
24
C
B24C 1/00 (2006.01)
Patent
CA 2597005
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 pressurised 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.
L'invention concerne un dispositif et un procédé pour nettoyer, activer ou prétraiter des pièces par projection de neige carbonique. Le jet de neige carbonique est produit à partir de fluides contenant du CO2 sous pression et d'au moins un gaz porteur comprimé, ledit jet de neige carbonique étant accéléré par l'intermédiaire d'une buse de sortie (14). Un mélange de dioxyde de carbone à deux phases, constitué de gaz carbonique et de particules de dioxyde de carbone, est produit dans une chambre d'agglomération (8) par agglomération et par compression de cristaux de neige carbonique et ajouté radialement au gaz porteur dans une chambre de mélange à plusieurs étages (10, 11, 12) qui comporte un tube de projection central (4) autour duquel s'écoule le mélange de dioxyde de carbone et qui est destiné à l'apport du gaz porteur, pour permettre l'obtention d'un écoulement gazeux turbulent d'énergie élevée, servant à l'usinage de la pièce.
Elbing Felix
Knackstedt Marc
Rotstein Raphael
Cryosnow Gmbh
Riches Mckenzie & Herbert Llp
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