| 摘要 |
PROBLEM TO BE SOLVED: To simplify a structure, reduce manufacturing costs, and facilitate manufacturing thereof.SOLUTION: A blast nozzle has a slit vent 15 in the longitudinal direction of a cylindrical body part 10 and has a supply port 12 at the end of the body part 10. The back part facing to the vent is made to be a thin part 16 thinner than the thicknesses of the other parts. The slit width of the vent 15 can be freely deformed wider or narrower around this thin part 16. A rectification plate 18 is provided inside the body part 10 facing to the vent 15. A large number of air circulation holes 18h are formed in the rectification plate 18. The slit width of the vent 15 is determined by fixing the rising parts 18k on both sides of this rectification plate 18 with screws 18s. Multiple groove parts 16g are rowed in the outer surface of the thin part 16 in the longitudinal direction of the body. The body part is manufactured by aluminum extrusion molding. The slit width of the vent can be freely adjusted wider or narrower continuously by tightening or loosening the screws at the rising parts on both sides of the rectification plate. |
