CO.sub.2 nozzle and method for cleaning pressure-sensitive surfa

Details CO.sub.2 nozzle and method for cleaning pressure-sensitive surfa CO.sub.2 nozzle and method for cleaning pressure-sensitive surfa

1996-01-16

1997-04-01

Rose, Robert A.

Abrading

Abrading process

Utilizing fluent abradant

451101, 451 99, 451100, 451 75, 239318, 239499, 239594, B24C 504

Patent

active

056160674

ABSTRACT:
In an apparatus for cleaning a workpiece with abrasive CO.sub.2 particles, a CO.sub.2 nozzle receives and expels liquid CO.sub.2 through at least one orifice sized for at least partially converting the liquid into CO.sub.2 particles. The CO.sub.2 particles are injected into a converging-diverging nozzle at a location adjacent to the throat section thereof. Pressurized air is directed into the converging section of the nozzle upstream from the throat section. The pressurized air accelerates the CO.sub.2 particles which are focused by the diverging section of the nozzle for impacting the pressure-sensitive surface of the workpiece to be cleaned.

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