Planetary mixture 


Principle


It operates on the principle of shear that develops in between the stationary wall and rotating blade. 

The blade moves around its own axis and also around the central axis which makes it reach every part of the vessel, due to which efficient mixing is achieved. 

The blade also consists of plates that are slightly sloped in order to enable in the upward movement of the material, thereby inducing tumbling motion.


Construction 

It consists of a C-shaped hard metal body provided with a flat bottom and a gear box along with motor at the top. 

A vessel is placed on the flat bottom, into which a blade is suspended. 

The blade is connected to the gear box with the help of a shaft. 

A support is fitted at the center of the body for holding the blade shaft. 

The equipment is constructed in such a manner that the vessel and the blade (along with shaft) can be easily removed by slightly raising the blade shaft. 

The speed of the blade can be altered with the help of variable speed drive.



There are three types of attachments are used as blade for planetary mixture-
1. Paddle 
2. Whisk
3. Hook

Working

Its operation is simple. Ingredients to be mixed are added to the vessel and the blade is allowed to rotate. 

As the motion of blade is planetary, it reaches each and every part of the vessel and mixing is achieved due to the shear developed between the blade and the vessel wall. 

The curved or slightly sloped blades facilitate size reduction and prevent aggregate formation. 

Since the blade comes in close contact with the vessel wall, there are no dead spots and hence efficient mixing occurs. 

The process is continued for long duration, after which the resultant mixture is collected by detaching the vessel.





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