Pellet press for dry ice

F - Mech Eng,Light,Heat,Weapons – 25 – J

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F25J 1/00 (2006.01) C01B 31/22 (2006.01) F17C 7/04 (2006.01)

Patent

CA 2421261

In an apparatus for making dry ice pellets having plural pressing chambers, each pressing chamber is provided with a movable piston for compressing carbon dioxide into solid state and for pressing the solid carbon dioxide through a perforated plate disposed at the end of the pressing chamber. Through connecting rods, the pistons in the pressing chambers are connected with a common crankshaft driven by a motor. The pressing chambers are provided with an inlet for supplying the carbon dioxide in fluid state and with outlet for carbon dioxide in gaseous state. In this way a very compact construction is achieved which is suited for mobile units, particularly dry ice blasting units.

L'invention concerne un appareil de production de granules de glace sèche comportant une pluralité de chambres de compression. Chaque chambre de compression est équipée d'un piston mobile permettant de compresser le dioxyde de carbone à l'état solide et pour presser le dioxyde de carbone à travers une plaque perforée disposée à l'extrémité de la chambre de compression. Par les bielles de liaison, les pistons, situés dans les chambres de compression, sont reliés à un vilebrequin commun entraîné par un moteur. Les chambres de compression sont équipées d'une admission permettant l'alimentation en dioxyde de carbone à l'état fluide et d'une sortie pour le dioxyde de carbone à l'état gazeux. De cette manière, on obtient une structure très compacte convenant aux unités mobiles et en particulier aux unités de projection de glace sèche.

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