Powder supply device

A powder supply device is provided with: a hopper that accommodates powder; a chute which is a cylindrical chute extending in the axial direction, one end of which is connected to the lower end of the hopper, and which discharges the powder supplied from the hopper from a discharge port at one end on the opposite side; a spiral screw which is rotatably provided inside the chute and which is provided with a spiral blade for conveying the powder to the discharge port; and at least one band-shaped part which is provided on the inner wall surface of the chute and has an elongated concave or convex shape, the longitudinal direction of the band-shaped part extending in a direction intersecting at least a portion of the blade. 一种粉体供给装置，其具有：料斗，其容纳粉体；滑槽，其为沿轴向延伸的筒状滑槽，其一端与料斗的下端连接，且将从料斗供给的粉体从相反侧的一端的排出口排出；螺旋螺杆，其以能够旋转的方式设置在滑槽的内部，具备向排出口输送粉体的螺旋状叶片；以及带状部，其为设置在滑槽的内壁面且呈细长的凹状或凸状的至少一个带状部，并且长边方向沿着与叶片的至少一部分交叉的方向延伸。