| 摘要 |
<p>PURPOSE:To make it possible to continuously operate a blast system which is used for descaling the outer surface of a metal material, and as well to simplify the structure of the system for aiming at making the system compact, by recovering and reusing abrasive jetted from a blast nozzle. CONSTITUTION:An abrasive mixing device 2 in a blast body 5 comprises a storage tank 11, a pinch roller shift section 12 and a mixing section 13. Abrasive which is fed to the mixing section 13 from the storage tank 11 through the pinch-roller shift section 12, is carried by high-pressure air fed from a high-pressure air supply 1, passing through a blast hose 3, and is jetted from a blast nozzle 4 to blast an object to be polished. This blast-work is conducted in a polishing box 6. Abrasive jetted into the box 6 is then recirculated to a cyclone separator 8 from a collector chute 21 and a recovery pipe 7. The abrasive having flowed into the separator 8 is sorted and separated into reusing abrasive and dust. The abrasive is fed to the tank 11 through an extractor section. The dust is discharged from a dust discharge outlet 9 and reaches a dust collector 10.</p> |
