01 Cotton sliver is caught in hanging flowers
Cause: Mainly caused by uneven passages, rupture of the sliver tube, aging of the suction bucket leather strips, etc.
Preventive measures: polish each channel smoothly and without burrs, promptly repair broken sliver cans, replace aging leather strips in a timely manner, and strengthen operating patrols to remove them promptly when found.
Effects on the post-processing process: causing roving breakage or bad roving, as well as slubs or wrong wefts on the cloth surface.
02 Thick and Thick Bar
Cause:
① Self-stop failure, resulting in too many strands or too few strands;
② The cotton sliver behind the machine is pleated and fed, the lap is too long or the pressure is poor, etc.;
③ The sliver is too long or too short due to poor wrapping, and the wrapping is too tight.
Preventive measures:
① Electrical failure should be repaired in time;
② Carry out operating methods conscientiously and strengthen patrols;
③ Strengthen mechanical inspection and repair;
④ Do a good job in preventing defects.
Effects on subsequent processes: causing roving breakage and wrong weft defects.
03 Impurity bar
Cause of occurrence:
① The cleaning work is not timely, the cleaning method is incorrect, and there is a slapping problem;
② The air suction bucket or the return flannel cloth fails.
Preventive measures:
① Carefully follow the cleaning schedule and complete all cleaning tasks in a timely manner, and do not slap when cleaning;
② The air suction hopper or rotating flannel should always be kept in good condition.
Influence on post-processing: causing roving breakage and slub defects.
04 Tops
Cause of occurrence:
① The surface roughness value of each part of the cotton sliver and cotton mesh channel is high and there are flowers;
② The mouth of the sliver tube is rough;
③ The sliver can capacity is too full;
④ The humidity in the workshop is too low;
⑤ Up and down The roller surface roughness value is on the high side.
Preventive measures:
① Strengthen equipment maintenance and refurbishment or replacement of sliver cans;
② Doffing according to fixed length;
③ Strengthen temperature and humidity management;
Influence on subsequent processes: causing Uneven dryness and slub defects.
05 Oil strips
Cause of occurrence:
① The rubber roller or coil gear is not refueled properly;
② The cotton sliver falls to the ground and is stained;
③ Oil hand joint;
④ The drafting part is not wiped clean when wiping the car flat;
⑤ Gear box or pinion The cartridge is leaking oil.
Preventive measures:
① Strengthen inspections and wipe away oil stains at any time;
② The oily hand does not hold the tampon, does not join it, and the tampon does not fall to the ground.
Influence on the post-processing process: causing oil warp and oil weft defects in the fabric, affecting the quality of the machine.
06 Severe unevenness
Cause:
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① Poor pressure or rubber roller and roller beating, rubber roller skew, concave center, lack of oil, big and small ends, etc.
② The rubber roller, the roller and the thin strip were not removed after wrapping.
③ The drafting gear is poorly engaged, worn out or has missing teeth.
④ The top roller has a concave center and a large number of flowers; the top roller is not pressurized enough, or the pressure roller deviates from the center of the top roller, or the pressure difference between the two ends is too large; the roller spacing moves ;Upper roller or lower roller wrapped with thin flowers.
⑤ The pressure rod is bent and deformed, the position of the pressure rod is too low, and the control force on the cotton web is too strong, resulting in the problem of inability to stretch.
⑥ The bearing is damaged.
⑦ The tooth shape error of the drafting gear is too large, and the radial runout of the ring gear is large.
⑧ The drafting gear key is loose.
⑨ The air suction and cleaning effect is not good, and flying flowers are caught in the cotton net.
Preventive measures:
① Strengthen equipment maintenance and inspection;
② When you find rubber rollers or rollers, you need to remove the thin strips.
Effects on the post-processing process: causing large-scale quality degradation, uneven dryness and regular defects on the cloth surface. </p
