| 摘要 |
PROBLEM TO BE SOLVED: To provide a suction hood capable of effectively collecting reusable coarse powder without disposing of the coarse powder, by preventing abrasion of the suction hood by preventing staying-deposition in the hood inside of the coarse powder.SOLUTION: A connection port 3 with a suction duct is formed on both side surfaces of a cylindrical hood 1, and a shielding plate 4 is also provided in a front upper part of the cylindrical hood 1, and its lower part is formed as a suction opening 2, and a spiral flow is formed in the hood inside. A coarse powder-extracting opening 5 for extracting the coarse powder of 100 μm or more separated by centrifugal force of the spiral flow, is further formed in an inner surface lower part of the cylindrical hood 1. |
