| 摘要 |
PROBLEM TO BE SOLVED: To provide a blasting machine capable of effectively removing burrs on a work ground in the form of band or strip while the space used remains small and noise emission is suppressed. SOLUTION: A blasting machine is composed of a means 3 to feed and exhaust a work to be ground in the form of band or strip, a polishing chamber 4 provided with nozzles 12a and 12b in groups to spout abrasive grains to the work, a dust gathering chamber to gather polishing dust produced in the chamber 4 by passing it through a filter 13, and an abrasive grain circulated supplying means 6 to supply abrasive grains in a collection hopper 14 to the nozzles 12a and 12b using a venturi mechanism. The nozzles 12a and 12b are formed first in the grain receiving region and then the approach region and the stream trimming region, where a compressed air jetting cylinder is opened penetratively in the center of the receiving region, and a fan is installed in a silencer mounting wall of a chamber where the compressor is intalled, and an exhaust hole is provided in a lower base frame of the confronting wall surface.
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