| 摘要 |
PROBLEM TO BE SOLVED: To mix efficiently and uniformly even comparatively highly viscous liquid by less electric energy by a method wherein even in a mixer blade having a helical ribbon blade formed so that a band-like plate of a specific width forms a helical surface, a projection part projected from an outside end part is provided to the band-like plate. SOLUTION: Two helical ribbon blades 82 and 84 are fitted to both end parts of a cross arm 62, and one helical ribbon blade is fitted on the way of the cross arm 62 and an end part of another cross arm 64. Then, both blades 82 and 84 are respectively formed so as to form a helical surface of a specific width band-like plate, and they are combined to comprise a mixer blade 8. Herein a plurality of projected parts 822 and 842 which project from the surface of the band-like plate to its outer end part are provided to both blades 82 and 84. In this case the projected part 822 provided on one side band-like plate 82 becoming linear symmetry with a mixing shaft 6 as a central line, and the projected part 842 provided on the other band-like body 84 are preferably alternately arranged so as not to exist at the same position on the same vertical plane to the central line.
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