Abrading – Abrading process – Utilizing fluent abradant
Patent
1993-04-29
1995-12-05
Lavinder, Jack W.
Abrading
Abrading process
Utilizing fluent abradant
451 95, 451 97, 451 98, 134 7, 134 38, B08B 700, B24C 506, B24C 100
Patent
active
054723698
ABSTRACT:
A cryoblasting process having a centrifugal accelerator for accelerating frozen pellets of argon or carbon dioxide toward a target area utilizes an accelerator throw wheel designed to induce, during operation, the creation of a low-friction gas bearing within internal passages of the wheel which would otherwise retard acceleration of the pellets as they move through the passages. An associated system and method for removing paint from a surface with cryoblasting techniques involves the treating, such as a preheating, of the painted surface to soften the paint prior to the impacting of frozen pellets thereagainst to increase the rate of paint removal. A system and method for producing large quantities of frozen pellets from a liquid material, such as liquid argon or carbon dioxide, for use in a cryoblasting process utilizes a chamber into which the liquid material is introduced in the form of a jet which disintegrates into droplets. A non-condensible gas, such as inert helium or air, is injected into the chamber at a controlled rate so that the droplets freeze into bodies of relatively high density.
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Fisher Paul W.
Foster Christopher A.
Adams Harold W.
Lavinder Jack W.
Martin Marietta Energy Systems Inc.
McKee Michael E.
Spicer James M.
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