| 摘要 |
A method for dry micro-cleaning by spraying abrasive powders having a very small particle size (0-200 micrometres). The method comprises spraying a support to be blasted with a micro-abrasive spray produced by the continuous high-speed movement of a multiplicity of thin compressed air streams which are loaded with low-kinetic energy abrasive particles, and moving the resulting micro-abrasive spray along the whole length of the support to be blasted. The micro-abrasive spray is formed through a spraying wheel (10) provided with multiple fine abrasive spray nozzles (6), whereby close blasting with light surface contact may be achieved, and ashlar supports and the like may be cleaned of all kinds of dirt and deposits. |
