BROAD SCRAPING DEVICE
PURPOSE:To perform board scrapping so efficiently with a small, lightweight device, by installing an injection nozzle in one side end part of an oblong, flat blast cover, with the nozzle tilted toward the other end part of the cover, while installing a recovery nozzle in a proper spot of the blast c...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To perform board scrapping so efficiently with a small, lightweight device, by installing an injection nozzle in one side end part of an oblong, flat blast cover, with the nozzle tilted toward the other end part of the cover, while installing a recovery nozzle in a proper spot of the blast cover in succesion. CONSTITUTION:A lower surface of a blast cover 1 is opened, while an upper surface shows a semicircular type oblong, flat box body, and a seal material being short in projecting length is installed over the whole circumference of an opening edge. At both end parts of the top of the cover 1, a pair of pipelike nozzle cases 21 are projectingly installed as being tilted to an opening surface of the cover 1 obliquely downed so as to cause the lower end of these cases 21 to be opposed to each other's side. A tilt angle theta1 of the nozzle 2 and a distance D between nozzles are determined so as not to superpose each of injection ranges A and A for scraping abrasives to be jetted out of both nozzles on the opening surface of the cover 1 as well as not to produce any clearance there. A tip end of the recovery nozzle 4 is branched off, and each tip of branching pipes 41 is connected to both end parts of the cover 1 and interconnected to the side of the cover 1. |
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