Concentrated spinning, as a new ring spinning method to […]
Concentrated spinning, as a new ring spinning method to improve yarn quality, has attracted more and more attention. How to improve product quality has attracted more and more attention from spinning companies. This article mainly introduces several common factors affecting the quality of agglomerated spinning yarns.
Exhaust volume of negative pressure fan and negative pressure of negative pressure pipe
The negative pressure of the negative pressure tube is the most direct and critical factor affecting the quality of the aggregate spinning yarn. Facts have proven that the amount of negative-pressure fan exhaust will directly affect the amount of negative pressure; in addition, the accumulation of flowers in the negative-pressure fan wind box is also a key factor affecting the negative pressure of the negative-pressure tube. In daily production, it is necessary to clean up the bellows accumulated flowers in time to keep the negative pressure stable.
According to actual tests and production findings, the negative pressure of agglomerated spinning needs to be maintained at 2.4 kPa to 3.0 kPa. If the negative pressure is too low, it will cause an increase in the head breakage rate, an increase in hairiness, a long hairiness, and a large unevenness of hairiness. According to actual measurements, under the same temperature and humidity conditions, when the negative pressure is between 2.4 kPa and 2.7 kPa, the difference between the negative pressure of the front and the rear is about 150 Pa to 350 Pa, and the difference between the hairiness is about 30%. For example, the number of tail hairs on the C 7.29 tex yarn is 812.20 hairs / m, while the head is 1065.40 hairs / m. Production practice proves that a 4.28 kW negative pressure fan can be selected for the 1008 spinning frame and a 2.4 kW negative pressure fan can be selected for the 512 spinning frame. Properly increasing the speed of the negative pressure fan can reduce the negative pressure difference between the head and the rear, and minimize the impact of the negative pressure difference on the yarn quality. Each time you scan the car, you can remove 6 to 8 negative pressure pipes on both sides of the tail end, turn on the negative pressure fan, and suck out the accumulated flowers accumulated in the negative pressure air cylinder to clean it.
Movement state of the sliver on the negative pressure tube
The state of movement of the sliver on the negative pressure tube is an important factor affecting the yarn dryness. Under normal circumstances, the sliver is transferred from the roller to the negative pressure tube and the process of moving on the negative pressure tube. In the middle, the sliver moves in a relatively straight and continuously folded state. However, due to some factors, the movement state of the sliver will change.