Main reasons for the cot winding in the spinning process?
Answer 1: in the spinning process, the main reasons for wrapping and winding the cots are as follows:
1) static electricity and high potential difference are generated by friction between cotton fiber and cot surface to absorb or repel fiber;
2) the anti-static property of COTS is poor;
3) cracks and other defects on the surface of the rubber roller;
4) the surface of the rubber roller is burred, not smooth and fiber is adhered;
5) the friction coefficient of the cot surface is not appropriate;
6) poor oil and pollution resistance of COTS;
7) the moisture absorption and dehumidification performance of the cot is poor, so that a layer of water film adheres to the fiber on the cot surface;
8) the temperature difference between the cot and the workshop is large, and the temperature and humidity are not balanced in the workshop before the cot is used on the vehicle;
9) the grinding process is improper or the grinding roller machine with grinding wheel is not normal, which causes regular lines on the surface of the rubber roller;
10) the length of cotton blending is long while the diameter of cot is small;
11) the roving is heavy and quantitative, the drafting multiple of spinning front area is large, the process pressure design is too large, and the front cot is easy to wind;
12) the surface treatment of the cot is improper, such as the incorrect proportion of the coating, too thick coating, incorrect selection of the cot cleaning agent, and the surface is astringent and sticky after washing.
The main reasons for the winding of aprons during spinning are as follows:
1) the friction coefficient of the rubber ring surface is large, and the static electricity generated causes the fibers on the surface of the yarn strip to be scattered and hairy, with more flying flowers, and the static electricity accumulation causes winding;
2) the outer surface of the apron is astringent, and it is also easy to adhere to the fiber to form winding, or be taken away by the strip to cause coarse yarn defects;
3) the anti-static performance of the rubber ring is poor, resulting in electrostatic effect, resulting in the accumulation of flowers around the rubber ring.
Comparatively speaking, the problem of apron winding is less than that of cot in spinning process. Through reasonable selection of the use cycle of the rubber ring and strengthening the cleaning and maintenance, the problem of the winding of the rubber ring will be solved.
Answer 2: the reason why the rubber roller is wrapped in combing process:
① after scouring and dyeing, the wax and pectin contained in raw cotton are removed, and the properties of cotton fiber are changed, resulting in poor spinnability.
② different types of auxiliaries are selected, even if the raw cotton of the same batch number is dyed into the same color number, the spinnability is also different in the same process.
③ the moisture regain of cotton roll is low. In the spinning process, static electricity is generated due to friction, which adsorbs the fibers in the cotton web. Light causes hair on both sides of the cotton net, easy to curl before the bell mouth, easy to block the detection light after the curling, resulting in unnecessary stop, and easy to block the bell mouth; serious causes the rubber roller to twine, even can not start normally.
(4) if the moisture return of cotton roll is too large, it is easy to cause the combing cot to twine; if the moisture return of cotton roll is too large, it will cause the cot and roller to twine at the same time.
⑤ factors such as equipment process and equipment conditions, such as improper roller spacing, improper rubber roller pressure, serious wear at both ends of rubber roller, etc.
⑥ the design of temperature and humidity in the workshop is not suitable or the control is improper.
