| 摘要 |
PROBLEM TO BE SOLVED: To achieve a long-sized constitution that prevents deflection of a screw and occurrence of abrasion powder, is inexpensive, and satisfies (L/D)>10, by constituting each of bearing parts at both ends of the screw with a pair of bearings. SOLUTION: In this screw type powder supplying device, the screw 3 disposed rotatably in a body 2 of a cylindrical member having an inner hole having circular cross section is driven by a rotation driving device 4, and powder is supplied by the screw 3. An upstream end bearing part 5 and a downstream end bearing part 6 for supporting both ends of the screw 3 have two bearings 5a, 5b and 6a, 6b, respectively.
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