Patent attributes
A bottom wall surface of a blasting chamber of a blasting machine provided with hoppers for recovering an abrasive is formed at a lowest possible position. A cabinet 3 of a blasting machine 1 is compartmentalized at a predetermined position into an upper space and a lower space by mesh members (21, 22) that allow the abrasive to pass therethrough to form a blasting chamber 2 having a bottom wall surface 20 defined by the mesh members (21, 22). Hoppers 10 substantially shaped like an inverted quadrangular pyramid are disposed below the mesh members (21, 22) such that top portions of the hoppers 10 are opened toward the mesh members (21, 22) and that the bottom end of each of the hoppers 10 is made to communicate with suction means, such as a dust collector, through a recovery pipe 30.
