Principle:
Mechanism of mixing is shear. Shear is applied between moving blade and stationary wall. Mixing arm moves around its own axis and around the central axis so that it reaches every spot of the vessel. The plates in the blades are sloped so that powder makes an upward movement to achieve tumbling action also.
Construction:
Consists of vertical cylinder shell which can be removed.
The blade is mounted from the top of the bowl.
Mixing shaft is driven by planetary gear and it is normally built with variable speed drive.