SURFACE PROCESSING APPARATUS, SURFACE PROCESSING FACILITY, AND SURFACE PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a surface processing apparatus for suppressing the density change of abrasive grains to be used in circulation at the surface processing of a wet blast.SOLUTION: A surface processing apparatus comprises: a nozzle part 5 for mixing a slurry prepared by dispersing abrasive grains into a liquid, to inject the mixture onto the surface of a working object 2; a nozzle moving part for moving the nozzle part 5 in a main scanning direction; a working object transportation part 4 for step-transporting the working object 2 in an auxiliary scanning direction perpendicular to said main scanning direction; a slurry circulation feed section 8 for recovering the slurry injected from the nozzle part 5 thereby to circulate and feed the slurry to the nozzle part 5; and a nozzle cover part 6 for regulating the outflow direction of the slurry injected from the nozzle part 5 toward the working object 2, thereby to discharge the slurry to said slurry circulation feed section.