Study on material passage diagram of carding machine.

 Experiment Name: Study on material passage diagram of carding machine.

Introduction: Carding is a mechanical process that disentangles, cleans and intermix fibers s to supply endless web or sliver suitable for subsequent processing. during this process ,fibers are opened, parallelized & removes dust, impurities, short fibers to supply continuous strand of sliver. this can be achieved by passing the fibers between differentially moving surfaces covered with card clothing. The word comes from the Latin “CARDUUS” meaning thistle or teasel, as dried vegetable teasels were first used to comb the wool .

Objective of the experiment:

1. To know about different parts of carding machine.

2. To know about mechanism of carding machine.

3. Drawing a simple diagram of carding machine.

Machine task:

1. To open individual fibers 

2. Elimination of impurities

3. Elimination of dust

4. Disentanglement of neps

5. Fiber blending & orientation

6. Removal of short fibers

7. Parallelizing and stretching of the fibers

8. Transformation of the lap into a sliver

Different parts of carding machine according to diagram:

1. Lap Stand

2. Lap roller

3. Lap

4. Feed plate

5. Feed roller

6. Taker in

7. Cylinder

8. Flats

9. Taker in under casing

10. mote knife

11. Casing

12. Doffer

13. Cylinder under casing

14. Doffer comb

15. Funnel trumpet

16. Compressed roller

17. Delivery roller

18. Cleaner brush

19. Sliver can

20. Cleaning roller

Actions in carding machine:

I . Stripping action: when two close surfaces have same wire direction but their speed direction is opposite to each other, then the action between two surfaces is named stripping action. Opening and cleaning of fibers is completed by this action.

1. Action between taker in and cylinder

2. Wire direction same

3. Speed direction opposite

4. Face to back arrangement of wires

II . Carding action: If two closed surfaces have opposite wire direction and their speed direction is additionally opposite to each other, then the action between two surfaces is understood as carding action. Opening to individual fibers and neps removal is completed by this action.

1. Action between cylinder and flat

2. Wire direction opposite

3. Speed direction opposite

4. Face to face arrangement of wires

 III . Doffing action: when two close surfaces have opposite wire direction and their speed direction is additionally opposite to each other, then the action between two surfaces is understood as doffing action. Web formation of fibers is completed by this action.

1. Action between Cylinder and doffer

2. Wire direction opposite

3. Speed direction opposite

4. Face to face arrangement

Working Principle of carding machine:

1. Lap is placed to lap stand

2. Transport roller forward the material to feed plate.

3. Taker in opens the material to small flocks. 

4. When the material passes to main cylinder grid bars and carding segment eliminate a great parts of impurities.

5. Suction dust and carry away the waste.

6. Main cylinder and fixed carding segments designed to assists the carding operation.

7. The main carding operation occurs between flats and cylinder.

8. Cleaning unit cleans stripes fibre, naps and foreign matters from flats.

9. The doffer combines the fibre into a web

10. Calendar roller calendars the cotton and moves that toward.

11. At last by can and coiler the sliver is produced.