27 December 2012
High Speed/Beam/Direct Warping | Sectional Warping | Differences Between Sectional and High Speed Warping
High Speed Warping:
High speed warping also called Beam warping/Direct warping.
In high speed warping the yarn is wound parallel on the warping beam.
All the yarns are wound at once and simple flanged beam is used. It is a
very high speed process and is used for making fabric of single colour.
Flow Chart of High Speed Warping
Creel
↓
Beam for sizing
↓
Weaver’s Beam
↓
Beam for sizing
↓
Weaver’s Beam
Features of High Speed Warping
- It is used to make common fabrics in large quantities
- It is used to produce weavers beam from single yarn
- The production is high
- Large amount of yarn is required to produce a weavers beam
- Sizing is done
- Simple flanged beam is used and drums are not required
In sectional warping
equal length of yarn is first wound in small sections or sheets on a
drum. Then from the drum it is transferred to the beam. By this process
we directly get the weavers beam. This is a two stage method and is
used for making fancy fabrics.
Flow Chart of Sectional Warping:
Creel
↓
Drum
↓
Beam (Weaver’s Beam)
↓
Drum
↓
Beam (Weaver’s Beam)
- Sectional warping is used for short runs especially for fancy pattern fabrics.
- In this case sections of the warp which may contain up to 1000 ends are first wound onto a drum tapered with a given cone angle.
- So cross wound sections are combined on the drum & thus each layer of warp contains the same number of ends on the drum.
- Then the warp threads altogether are transferred onto a weavers beam by unwinding the drum.
- In this method the warp threads are not necessarily processed in sizing.
- This is suitable for making checked, stripped or other fancy fabric.
- We directly obtain weaver’s beam from this process
- As sizing is not done, so multi-ply yarns or yarns which do not require sizing are used
- Small amount of yarn is required to produce the weaver’s beam
- Sectional warping is used to produce a warp beam with a greater member if ends
- The production is less in sectional warping
- The yarn tension is less uniform
- It is less efficient than high speed warping
Differences Between Sectional and High Speed Warping
High Speed Warping
|
Sectional Warping
|
1. Beam warping is used for long runs of grey fabrics & simple pattern.
|
1. Sectional warping is used for short runs especially for fancy pattern fabrics.
|
2. The amount of colored yarn is less than 15% of the total.
|
2. Greater amount of colored yarn is used.
|
3. High production.
|
3. Low production.
|
4. Large amount of yarn required.
|
4. Small amount of yarn required.
|
5. Single yarn is used.
|
5. Twisted yarn is used.
|
6. Less expensive.
|
6. More expensive.
|
7. It is most widely used for cotton, linen, woolen & worsted yarn.
|
7. It is most widely used for silk & synthetic yarn.
|
8. Uniform tension of yarn.
|
8. Less uniform tension of yarn.
|
9. Weavers beam is produced after sizing.
|
9. Weavers beam is produced after warping.
|
10. Creel capacity is more.
|
10. Creel capacity is less.
|
11. Beam warping is more widely used.
|
11. Sectional warping is not widely used.
|
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