Thursday, 18 December 2008

Major Warping Defects

On Beam Warpers

1. Lapped Ends

The yarn's broken end is not tied to its end on the warp beam and overlaps the adjacent yarn. The bem is not properly braked, the signal hook fails to operate.

2. Bulges and yarn ends drawn from the midddle

The broken end has not been correctly found and pieced up to the adjacent yarn.

3. Broken ends on the beam

It is due to reasons mentioned in point 2. A group of ends is broken and tied as a bunch or worked-in with overlapping

4. Incision of yarn at the butts of the warp beam or slackness of extreme yarns

The reed is improperly set with respect to the warp beam flanges; deformation of the warp beam flange

5. The number of yarn ends of the beam is excessive or insufficient

Incorrect number of bobbins in warping

6. Conical winding on the beam

Incorrect load applied by the pressure roller

7. Slacks and irregular yarn tension

Improper threading of the yarn into the tension devices; ejection of yarn from under the disc of the yarn tensioning device, yarn tension devices of poor quality

8.Frequent yarn breakages at the beam edges

Burrs and nicks on the surface of the warp beam flanges

9. Improper length of warping

Malfunction of the counter, and the brakes of the measuring device and warp beams

10. Coarse Knots

Manual tying-up

11. Loose yarn winding

The pressure roller is lightly pressed against the warp roller

12. Working -in of fluff, oily ends and yarn of different density

Careless work of the operative, creeler and oiler.

13. Bulgy winding on the warp beam

Irregular laying of yarn ends in the reed, missing a dent and placing two ends in the adjacent one.

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