open end spinning process

Why Open End Spinning ???

Ring Frame Limitations        Production rate & Package size

Limitation of maximum spindle speed

  1. Yarn delivery rate  2. yarn balloon

  3. end breakage  4. yarn strength

  5. Traveller velocity 

Yarn Tension α (Sp. Speed)² ---  end breaks

Limitation of maximum traveller speed

Traveller burn due to thermal loading

25000 RPM, 36 mm ring, 152 mm lift ------ traveller speed of 47 m/sec

  Very little scope for further improvement !!!!

 

 

 
 

Also known as open end (OE) spinning or free fibre spinning:

 

 Stages

1. Initial drafting                 2. Fibre transport               3. Fibre condensation

4. Twist insertion                5. Winding   

Advantages of Open End Spinning:

•         Higher speed of twist insertation which leads to higher delivery speed

•         Lower power consumption

•         Larger delivery package

•         Elimination of process steps like roving

•         Better yarn regularity

•         Reduced labour and better working condition etc.

•         Ease of automation

Different types of open end spinning:

•          Rotor Spinning

•          Friction Spinning

•          False Twist Spinning

•          Wrap Spinning.

•          etc…                                   

Rotor Spinning:  

Basic Operations

1. Opening of fibres    

2. Cleaning

3. Homogenizing

4. Reassembling

5. Ordering

6. Improving evenness by doubling

7. Imparting strength by twisting

 8. Winding/Package formation