Apparatus For Abrasively Treating Metal Castings, Forgings, And The Like

Author:  Turnbull, D. C.
Source:  US Patent 2,240,248
Doc ID:  1941000
Year of Publication:  1941
Abstract:  
This invention relates to apparatus for abrasively treating metal castings, forgings and the like. The article to be treated or so-called work piece is advanced into a treating zone wherein it is subjected to the action of one or more streams of abrasive particles. The stream or streams have a divergent fan-like shape and the work piece is moved about the stream or streams whereby the angularity of impingement of abrasive particles against the various surfaces of the work piece is varied, thereby to effect complete treatment of the various surfaces including cavities, depressions and other irregular portions. The work piece may be rotated or turned while in the abrasive stream or streams to more fully expose the various portions to the action of the abrasive. In certain cases, the direction of flight of the abrasive particles is varied as the work pieces is moved about in the treating zone whereby the stream follows the movement of the work piece and a greater range of movement of the work piece is obtainable and consequently a greater range of variation of angularity of impingement.