Hammer Mill.

 Hammer Mill.

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Principle:

• Works on the principle of Impact.

Diagram: 

Construction:

• The mill consists of a metallic case, rotor, a central shaft with hammers, screen, feed and outlet.

• The metallic case contains a rotor at the middle which has attached four to seven swinging hammers.

• The motor is moved with the help of electricity and speed of which can be controlled with the help of panels.

• The feed is used to introduce raw material in the mill.

• The removable screen is attached at the bottom.

• The product outlet at the bottom is used to collect finished products.

Working:

• The material to be size reduced is introduced into the mill through the feed.

• The electrical supply of the mill is started after a careful closure of feed.

• The central panel with hammers starts rotating at speed.

• The size reduction takes place when material is hit by swinging hammers and collision of particles with the stationary metallic wall of the case.

• The reduced size material falls on the screen at the bottom.

• The vibrations of the mill help in coming out of the product through the screen.

• The screen of desired aperture size can be used as per requirement.

Advantages:

1. Useful for hard substances.

2. Suitable for continuous operation after simple modifications.

Disadvantages:

1. Not suitable for sticky substances like resins.

2. Produces heat hence not useful for heat sensitive substances.

Commonly Asked Question.

1. Write a short note on Hammer Mill.