Explain construction and working of Cutter mill or Hammer mill

Explain construction and working of Cutter mill or Hammer mill
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Answer :

CONSTRUCTION: It consists of a hopper at top and metal casing enclosing two sets of knives i.e. stationary knives attached to stator and rotating are attached to rotor. The lower part of the casing consists of a screen , through which material can pass and collected in a suitable receiver, when the desired degree of size reduction is reached

WORKING: The material is put in to the hopper. The material is powdered to the desired size, due to fast moving knives ( cutting phenomenon) and is collected under the screen This mill has the advantage of continuous operation because of change of jamming is less as the cutters are not fixed. 

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Hammer mill


CONSTRUCTION: It consists of a stout metal casing enclosing to which four or more swinging hammer are attached. The lower part of the casing consists of a screen , through which material can pass and collected in a suitable receiver , when the desired degree of size reduction is reached 


WORKING: The material is put in to the hopper which is connected with the drum. The material is powdered to the desired size, due to fast rotation of hammer and is collected under the screen. This mill has the advantage of continuous operation because of change of jamming is less as the hammers are not fixed. The mill can produce coarse to moderately fine powder


DIAGRAM:

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