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Rationale
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Objectives
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| CURRICULUM |
| SL |
Topics |
Periods |
| 1. |
Motion of Weaving |
02 |
| 2. |
Loom |
06 |
| 3. |
Shedding Mechanism |
04 |
| 4. |
Tappet Shedding Mechanism |
10 |
| 5. |
Picking Mechanism |
09 |
| 6. |
Beating Up |
02 |
| 7. |
Timing and Setting |
02 |
| 8. |
Take Up Motion |
06 |
| 9. |
Let-Off Motion |
04 |
| 10. |
Weft Fork Motion |
02 |
| 11. |
Warp Protecting Motion |
03 |
| |
Total |
50 |
| CONTENTS |
| Topics |
Content |
Periods |
| 01 |
Motion of Weaving |
02 |
| 01.01 |
Principles and definition of fabric manufacture. |
|
| 01.02 |
Motions in weaving: Primary Secondary and Tertiary motions. |
|
| 02 |
Loom |
06 |
| 02.01 |
Introduction. |
|
| 02.02 |
Types of Loom: Handloom - brief idea of handloom, Powerloom - default study of plain tappet looms. |
|
| 02.03 |
Various parts of loom and its functions. |
|
| 02.04 |
Healds: Necessity of healds and types of healds. |
|
| 03 |
Shedding Mechanism |
04 |
| 03.01 |
Definition. |
|
| 03.02 |
Types of Shed: Closed shed (Bottom-closed and Centre-closed), Open shed - Semi open shed. |
|
| 03.03 |
Merits, demerits and uses of each type of shed. |
|
| 03.04 |
Shedding mechanisms and its kinds: Tappet, Dobby and Jacquard shedding mechanism. |
|
| 03.05 |
The scope of Tappet, Dobby and Jacquard shedding. |
|
| 04 |
Tappet Shedding Mechanism |
10 |
| 04.01 |
Tappets, cam and difference between cam and tappets. |
|
| 04.02 |
Types of tappet shedding: Negative tappet shedding and Positive tappet shedding. |
|
| 04.03 |
Various types of tappet shedding: Inside tappet shedding and Outside tappet shedding. |
|
| 04.04 |
Construction of cam and tappets for plain looms. |
|
| 04.05 |
Condition of good shedding. |
|
| 04.06 |
Early shedding and late shedding. |
|
| 05 |
Picking Mechanism |
09 |
| 05.01 |
Methods of picking. |
|
| 05.02 |
Types of picking mechanism: Introduction, Principles of spring pick, Principles of Torsion-Picking, Weft control in the multiple-gripper weaving machine. |
|
| 05.03 |
Conventional picking mechanism: Introduction, The cone-overpick mechanism, The cone-underpick mechanism, and other conventional picking mechanism. |
|
| 05.04 |
Shuttle-checking devices: Conventional shuttle looms and Multiple-gripper weaving machines. |
|
| 05.05 |
Shuttle and its types. |
|
| 05.06 |
Defects in shuttle and shuttle cop. |
|
| 05.07 |
Defects in negative picking. |
|
| 05.08 |
Essential feature to a good pick. |
|
| 05.09 |
Comparison between underpick and overpick. |
|
| 05.11 |
Early and Late picking. |
|
| 05.12 |
Study of the following: Picker, Picking Band, Buffer, Check Strap, Swell spring, Shuttle Guard, Shuttle flying, Shuttle trapping. |
|
| 06 |
Beating up |
02 |
| 06.01 |
Introduction. |
|
| 06.02 |
Construction and Mechanism. |
|
| 06.03 |
Eccentricity of sley motion and its effect on loom working. |
|
| 06.04 |
Factors affecting the sley motion. |
|
| 07 |
Timing and Setting |
02 |
| 07.01 |
A Method of indicating loom-timing. |
|
| 07.02 |
Timing of primary motions in tappet loom. |
|
| 07.03 |
Setting sley, shedding and picking. |
|
| 08 |
Take up Motion |
06 |
| 08.01 |
Introduction. |
|
| 08.02 |
Classification of take up motion: Negative and positive take-up motion. |
|
| 08.03 |
Five wheel take-up motion. |
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| 08.04 |
Seven wheel take-up motion. |
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| 08.05 |
Dividend of Loom. |
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| 08.06 |
Calculated dividend and practical dividend. |
|
| 08.07 |
Calculation regarding dividends. |
|
| 08.08 |
Changing the number of picks/inch. |
|
| 09 |
Let-Off Motion |
04 |
| 09.01 |
Objects. |
|
| 09.02 |
Types of Let-off motion: Negative and Positive Let-Off Motions. |
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| 09.03 |
Types of Negative Let-off motion: Frictional let-off motion; Chain, lever and weight let-off motion. Advantages and disadvantages of chain, lever and weight let-off motion. |
|
| 09.04 |
Conditions to good Let-off motion. |
|
| 10 |
Weft-Fork Motion |
02 |
| 10.01 |
Objects and principles. |
|
| 10.02 |
Types of Weft Fork motion: Side Weft and Centre Weft fork motion. Relative advantages and disadvantages between a single Weft fork and a centre weft fork motion. |
|
| 10.03 |
Timing of side weft fork motion. |
|
| 11 |
Warp Protecting Motion |
03 |
| 11.01 |
Introduction. |
|
| 11.02 |
Types of Warp Protecting motion: Loose Reed, Fast Reed and Electromagnetic Warp Protecting motion. |
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| 11.03 |
Loom Knocking off or Banging off. Defects of knocking off. |
|
| Recommended Books |
| SL |
Title/Publisher |
Author |
| 1. |
Weaving Mechanism, Vol. I, II |
N.N. Banerjee |
| 2. |
The Mechanism of Weaving |
Fox |
| 3. |
Principles of Weaving |
Robinson and Marks |
| 4. |
Cotton Weaving and Designing |
J. B. Taylor |
| 5. |
Cotton Yarn Weaving |
A.T.A. |
| 6. |
Tappet and Dobby Looms |
T. Robberts |
| 7. |
Weaving, Machines, Mechanisms, Management |
Talukdar |
| 8. |
Weaving Technology |
Kulkarni |
| Scheme of Examination: Final Examination Marks = 80 |
