B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
164/17, 327/72
B23K 31/10 (2006.01) B28D 1/00 (2006.01) C04B 41/53 (2006.01) E01C 23/08 (2006.01)
Patent
CA 1271230
ABSTRACT OF THE DISCLOSURE A method and apparatus treat a surface of natural rock or artificial stone-like material to give to the treated surface an attractive finish. A high temperature jet of plasma and a high speed jet of cooling fluid are projected onto the surface to be treated. The two jets are moved on the surface at a given speed with the jet of cooling fluid following that of plasma. The speed of movement is so selected that the high temperature plasma jet suddenly heats only a thin layer of rock or stone-like material to cause a thermal shock which bursts particles of rock or stone-like material at the surface thereof. As the jet of cooling fluid follows the jet of plasma, it suddenly cools the thin layer just heated by the plasma jet, and blows the burst particles off the body surface.
598629
Boulos Maher
Jurewicz Jerzy
Roy Clermont
Bkp Gp
Universite de Sherbrooke
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