FIELD: abrasive jet treatment processes and apparatuses, possibly manufacturing processes including surface treatment.
SUBSTANCE: apparatus includes housing where nozzle unit, discharging duct and duct for supplying abrasive containing mixture are arranged. Nozzle unit includes inner and outer envelopes and it has annular nozzle with flow-through portion. Mean surface of said flow-through portion is in the form of cone whose apex is outside nozzle unit. Inner envelope of nozzle unit and housing of apparatus are made with possibility of forming annular ejection duct between them.
EFFECT: improved evacuation of waste abrasive out of treatment zone, lowered dust separation to environment, reduced noise level.
4 cl, 2 dwg
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