| 摘要 |
PROBLEM TO BE SOLVED: To lower manufacturing cost and assembling cost of the blade ring of an air sweep type roller mill. SOLUTION: This blade ring 1 is manufactured from plural polygon divided bodies 10, and the polygon divided bodies 10 are cut out to precise dimensional from a planar metal sheet. To the individual polygon divided body 10, one or plural guide blades 4 are fitted at a predetermined angle of inclination. The polygon divided body 10 is formed of an outer polygon divided body 5, an inner polygon divided body 6, and at least one guide blade 4. The polygon divided bodies 10 are connected to form a polygon connecting body 15, and the polygon connected bodies 15 are connected to form a blade ring 1 of polyhedron structure having different diameters.
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