| 摘要 |
PROBLEM TO BE SOLVED: To provide a vertical screw conveyer capable of conveying efficiently powder and grains, capable of reducing the amount of the powder and grains remaining in a casing when switching a conveying object, and capable of preventing a screw blade from being abraded. SOLUTION: An upper face of the screw blade 12 is inclined by 5-30° to make an outer edge move downward, the outer edge of the screw blade 12 is hardened and increased in thickness by 2-10 mm, and a clearance between the outer edge of the screw blade 12 and an inner face of the casing is set to be 1-10 mm. COPYRIGHT: (C)2010,JPO&INPIT
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