Regular and uneven strips are distributed on the blackboard in diagonal strips, commonly known as “oblique strips”. Its regular length is generally equivalent to the circumference of the front roller or front rubber roller of the spinning yarn, or is greater than the circumference of the front roller of the spinning yarn. Reflected on the cloth surface, defective cloths such as “striped cloth” and “plaid cloth” appear. Regular uneven dryness usually occurs in the following situations.
1 Spinning machines generally appear or some A special type of yarn has uneven evenness. The reason is that the spinning drafting process is improperly configured, the total draft is too large, the back draft is too large or too small, the apron clamp or the roller spacing is inappropriate, and the rollers are tightened. Insufficient pressure, improper temperature and humidity control and defective semi-finished products (roving), etc.
2 The main reasons for uneven dryness in an area or adjacent machine are as follows.
1) The temperature and humidity in this area are poorly controlled.
2) The quality of pre-spinning fixed supply machines fluctuates.
3) Some machine process parameters (rollers, jaw spacing, back draft, etc.) are inappropriate or used incorrectly.
4) The rubber rollers and rubber rings in this area are of poor quality.
3 The main reasons for uneven dryness on some machines are as follows.
1) Roller eccentricity, bending or roller torsional vibration.
2) The draft transmission gear is excessively worn or poorly engaged.
3) The shaft and bearing of the draft transmission gear are worn beyond the limit.
4) After changing the special number (count), the process parameters were missed or wrong.
5) The machine has been parked for too long or the roving has become rotten over time.
6) The rubber rollers and rubber rings of this machine are of poor quality.
4 Partial or individual spindles on the machine have uneven dryness. The main reason is that the wear of some parts exceeds the limit or does not meet the specifications.
1) The feeding parts are poorly maintained or in disrepair (such as the yarn guide rod is rough and rusty, the porcelain bowl and ring are missing, the hanging spindle is damaged and cannot rotate properly, and the yarn guide horn is defective wait).
2) The yarn guide stroke deviates or individual yarn guide horns are skewed (often forming regular thick spots).
3) Back roller groove inlay or impurities, etc.
4) The rear rubber roller is under-pressurized or fails (the cradle compression spring declines or fails).
5) The rubber roller is not operating normally (the rubber roller is eccentric, there are indentations on the surface, the rubber roller has lost its elasticity, the rubber roller bearing is short of oil or the roller is seriously worn, the same grade of rubber roller Inconsistent specifications, etc.).
6) The rubber ring does not rotate properly or is frustrated (including uneven elasticity, hardness, cracking, deviation of the rubber ring, or lack of oil and wear of the middle and top rollers, etc.).
7) The self-adjusting center function of the cradle fails, and the “three straight lines” of the rubber roller are not in the correct position. </p
