초록 ▼

A blasting apparatus and a blasting method enable a processing pattern to be enlarged or modified in a suction type blasting apparatus by using a relatively simple composition, and also permit stable, continuous ejection of an abrasive in the enlarged or modified processing pattern. A nozzle (42) of

A blasting apparatus and a blasting method enable a processing pattern to be enlarged or modified in a suction type blasting apparatus by using a relatively simple composition, and also permit stable, continuous ejection of an abrasive in the enlarged or modified processing pattern. A nozzle (42) of a blast gun (40) of a suction type blasting apparatus is surrounded by a nozzle cover (49) with a predetermined gap provided therebetween, and a passage (43) which is opened in an abrasive ejecting direction between the outer periphery of the nozzle (42) and the inner periphery of the nozzle cover (49) is communicated with a supply source of compressed air. An abrasive dispersion chamber (52) serving as a dispersing nozzle is connected to an ejection port (47) of the blast gun (40).

대표청구항 ▼

[ What is claimed is:] [1.] A blasting method wherein:an air stream is ejected from a jet in communication with a supply source of compressed air;an abrasive is drawn in via an abrasive intake chamber, which is formed between said jet and a nozzle disposed at the front in the air injecting direction

[ What is claimed is:] [1.] A blasting method wherein:an air stream is ejected from a jet in communication with a supply source of compressed air;an abrasive is drawn in via an abrasive intake chamber, which is formed between said jet and a nozzle disposed at the front in the air injecting direction of said jet, from an abrasive supply source in communication with said abrasive intake chamber;secondary compressed air supplied from said supply source of compressed air is merged with a primary mixed fluid which is ejected from said nozzle and which is composed of said abrasive and primary compressed air in front of said nozzle in the direction in which said primary mixed fluid is ejected;a secondary mixed fluid produced by merging said primary mixed fluid and said secondary compressed air is introduced into an abrasive dispersion space;said abrasive dispersion space being composed of an abrasive dispersion section, the cross section of which in the width direction is gradually narrowed toward the direction in which said secondary mixed fluid is ejected, an abrasive rectifying section formed in front of said abrasive dispersion section and having a rectangular cross section, the cross-sectional shape of said secondary mixed fluid being rectified to the cross-sectional shape of said abrasive dispersion space; andsaid secondary mixed fluid being injected to the surface of a workpiece.