Shot blasting device

Abstract

Disclosed is a blasting apparatus (1) for performing surface treatment on small workpieces with efficiency, e.g., to control the surface roughness thereof or to control the corner shape thereof. The blasting apparatus includes an enclosure (10b) in which a blasting chamber (10) is defined; a nozzle assembly (13) which is disposed in the blasting chamber to blast the workpieces by discharging blast particles thereto; a classifier unit (20) for separating reusable blast particles from a mixture of the blast particles discharged from the nozzle assembly and dust particles resulting from the blasting; a reservoir unit (21) for holding the blast particles to be supplied to the nozzle assembly; and a collector unit (30) for drawing in under suction and thereby collecting the remaining mixture, from which the reusable blast particles have already been separated. The blasting chamber includes at least one or more hollow tumblers (11) which are adapted to be loaded with the workpieces and disposed to be rotatable about the center axis. The tumbler has one end closed to form a bottom with the other end opened to form an opening (11d) opposite to the bottom; a plurality of through holes (11i) on the circumferential wall surface thereof; and a polygonal or circular cross section in parallel to the opening.

Description

technical field [0001] This application claims the benefit of Japanese Patent Application No. 2010-178241 filed with Japan Patent Office on August 9, 2010, and the contents of the same application are incorporated herein by reference. [0002] The present invention relates to a shot blasting processing device that performs surface treatment of a plurality of workpieces. Background technique [0003] For surface processing (adjustment of surface roughness, rounding of corners, removal of burrs, etc.) of metal and nonmetal workpieces, for example, so-called barrel grinding devices disclosed in Patent Document 1 and Patent Document 2 are used. The surface treatment by means of a barrel grinding device is to put the workpiece and cutting and grinding medium (also referred to as "medium") into the rotating drum of the device, and make the workpiece and the medium inside the drum in a flowing state. Surface treatment of workpieces. In the processing by the barrel grinding device...

AI Technical Summary

Problems solved by technology

However, in this conventional device, since the vibrating drum must be installed in the processing chamber, the size of the processing chamber is increased, and the size of the dust collector and the sieving machine for sucking the blasting material and dust in the processing chamber are also increased accordingly. The problem

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