POLISHING METHOD BY BLASTING AND NOZZLE STRUCTURE FOR A BLASTING APPARATUS FOR USE IN THE POLISHING METHOD
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United States of America Patent
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Issued Date -
Oct 18, 2012
app pub date -
Mar 23, 2012
filing date -
Apr 14, 2011
priority date (Note) -
Abandoned
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Abstract
In a polishing performed by imparting kinetic energy to abrasive using a compressed gas flow, horizontal cutting force is obtained while vertical cutting force acting on a surface of a workpiece is inhibited. A compressed gas containing no abrasive is ejected from an accelerated flow generation nozzle 10 toward a surface of a workpiece W to generate an accelerated flow S along the surface of the workpiece W. Also, abrasive 30 is introduced into an abrasive introduction path 20 opening toward the surface of the workpiece W at an area where the accelerated flow S is generated, preferably together with a compressed gas to merge the abrasive 30 with the accelerated flow S and make the abrasive 30 slide along the surface of the workpiece W. Thus, horizontal cutting force is exerted on the surface.
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