Principle – shear. Inter meshing of sigma blades creates high shear and kneading action.
Construction and working:
It consists of double tough shaped stationary bowl.
Two sigma shaped blades are fitted horizontally in each tough of the bowl.
These blades are connected to a fixed speed drive.
Mixer is loaded from top and unloaded by tilting the entire bowl.
The blades move at different speeds , one about twice than the other, which allows movement of powder from sides to centers.
The material also moves top to downwards and gets sheared between the blades and the wall of the tough resulting cascading action.
Perforated blades can be used to break lumps and aggregates which creates high shear forces.
The final stage of mix represents an equilibrium state.