Textile Engineering

1. Cleaning Efficiency: Cleaning efficiency of the machine is the ratio of the trash
removed by the machine to that of total trash fed to the machine, expressed as
percentage.
Cleaning efficiency =
trash in feed%−trash in delivery%
trash in feed%
× 100%
=
trash removed
total trash content
× 100%
Let,
Total wt. of fiber in a lay down = 20,000 kg (100 bales)
Trash = 4% of total wt. = 800 kg
Trash removed = 2.8 % of total wt. = 560 kg
So, cleaning efficiency will be 70 % according to the formula.
Basic parameters to be considered in blow room:
1. No. of opening machine
2. Types of beater
3. Beater speed
4. Production rate of individual machine
5. Fiber micronaire
6. Size of the flocks in the feed
7. Type of grid and grid setting
8. Position of the machine in the sequence
9. Amount of trash in the material
10.Temperature and relative humidity in the blow room