| 摘要 |
Apparatus and methods for etching a metal surface 32 utilize a shrouded centrifugal throwing wheel to effect a uniform, non-pulsating application of very fine, lightweight, impact blasting media. The resulting etched finish is of a fine-grained quality suitable for use in lithography. A replaceable, wear-resistant liner 152, 154 is provided within the shroud which has side walls 112, 114 which converge towards a discharge opening 200 to funnel and dampen the blasting media as it is discharged towards the workpiece. <IMAGE> |
