| 摘要 |
An abrasive medium is described consisting of finely divided abrasive particles uniformly distributed in a semifolid, difficulty flowable rubberlike plastic material of the consistency of putty and which forms a substantially solid matrix in carrying out the method of this invention which comprises forcing the medium over an internal surface in abrading contact therewith Representatives of such plastic material are silicone putty or silicone rubber and a nonvulcanized plastic rubberlike putty. Two forms of apparatus for carrying out the method are disclosed. The workpiece is held between two cylinders with an opening through the workpiece in communication with the adjacent cylinder chambers in which reciprocating pistons move the medium alternately from one cylinder through the workpiece opening into the other cylinder.
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