For concrete mixers of the same capacity, due to their different tank volume utilization rates, their axial directions are different, the number of mixing arms is different, and the phase angles of adjacent mixing arms are also different. There are 45°, 60°, and 90°. The arms have straight arms, such as German BHS company, Italian SICOMA and Japanese NIKKO. And curved arms are also existed, such as German TEKA, Italian SICOMA, Japanese KYC, etc. The mixing blades of the concrete mixers produced by most companies use a 60° phase angle, intermittent layout, but there are also continuous layout.
Most of the design of the mixer device in China adopts a 60° phase angle. Both straight arm and curved arm mixer arms are used. The blades are mostly in the form of gaps. A few companies have continuous blade layouts. No matter what program has its own characteristics, but the spiral elevation angle of about 42°, the phase angle of 60°, the curved stirring arm, and the intermittently arranged stirring blade are good solutions. It has good stirring quality, high efficiency, low resistance of the stirring arm, low wear and low energy consumption.