Mixing blades of concrete mixing drums

Details Mixing blades of concrete mixing drums Mixing blades of concrete mixing drums

B - Operations, Transporting

01

F

259/28

B01F 9/06 (2006.01) B28C 5/20 (2006.01) B28C 5/42 (2006.01)

Patent

CA 1066267

A B S T R A C T In a rotary concrete mixing drum having an inner wall defining a mixing chamber which includes a mixing section and a charging throat section, said drum having a head end and an open charging end arranged at opposite ends thereof, said drum being mounted for rotation about a mixing axis extending between said head end and said discharge end, said charging throat section extending inwardly from said charging end to said mixing section, mixing blade means mounted on and extending spirally along said inner wall from adjacent said charging end to adjacent said head end, said mixing blades having a mixing face directed toward said head end and the discharge face directed toward said charging end, the portion of the mixing face extending within the charging throat section being a charging face, the improvement wherein said mixing blade comprises a leg portion projecting inwardly from said inner wall, a discharge lip portion projecting laterally from an inner end of said leg portion in a direction toward said charging end, said leg portion and said discharge portion being connected to one another before said leg portion is secured to said inner wall of said chamber, a mixing lip projecting laterally from said charging face of said leg portion in a direction toward said head end, said mixing lip extending over at least a major portion of said mixing section inwardly from said charging throat section, said mixing lip being secured to said leg portion by welding thereto after said leg portion is secured to said inner wall of said chamber such that said mixing lip does not inhibit mounting of the leg portion within said chamber.

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