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
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.