objectives, actions of blow room, wastage and faults in blow room, types of beater in blow room


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  1. Objectives of blow room

Objectives of blow room

1. To open the compressed bales of fibers

2. Remove dirt and dust, broken leaf, seed particles or any other foreign impurities from the fibers

3. To transfer the opened and cleaned fibers into a sheet form of definite width uniform weight per unit length which is called lap.

4. To roll the lap of predetermined length into a cylindrical shape around a lap pin.

5. To transfer the lap from the lap pin to a lap rod to a suitable and feed it to the subsequent m/c (carding).

Action of blow room line

I. Action of opposing spikes

II. Action of air currents

III. Action of beaters

IV. Regulating action

Wastage in blow room

1. Dropping

2. Dust

3. Filter waste

Faults in blow room

1. Irregular lap

2. Knocking off before completion of full lap

3. Rough appearance of full lap

4. Lap sheet thicker at one side than the other

5. Soft lap

6. Lap licking

7. Dropping under beater & grid bars

8. Formation of conical lap

9. Formation of split lap

10. Barrel shaped lap

11. Ragged lap selvedges

Types of beater in blow room

1. Porcupine beater

2. Bladed beater

3. Krishner beater