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A new way to reduce yarn hairiness in spinning process

Yarn hairiness is the main defect of ring spinning. It not only affects the appearance quality of ring spinning yarn, but also affects the appearance, hand feeling and loom efficiency of the fabric. It is also the main reason that affects the jet blocked end breakage of air-jet loom. Controlling and reducing the hairiness of ring spinning yarn has become one of the problems to be solved in ring spinning production. Therefore, it is very important to reduce yarn hairiness in spinning process, and the selection of various new equipment is worthy of attention.

Selection of new type ring and ring

Ring and ring are important parts in the spinning process of ring spinning frame. The matching of ring and ring will directly affect the spinning tension and the friction force between ring and ring. A replacement cycle of ring and ring includes walking maturity period, stable period and declining period. In the stable period, the ring and the ring are in good coordination, the movement of the ring is stable, the spinning tension fluctuation is small, the friction force is small, and the hairiness of the spinning yarn increases less; in the mature period and the declining period, the ring and the ring are in poor coordination, the spinning tension fluctuation is large, the friction force increases, and the hairiness of the spinning yarn increases more.

The size of the steel wire loop directly affects the space position of the yarn channel. The loop is large, the space is large, the yarn channel is wide, and the yarn is not easy to be rolled and scratched. When GS type steel ring is used for spinning, the number of hairiness is the least and the breakage rate is small. Because GS type steel wire ring has low center of gravity, smooth track, stable operation and reduced hairiness; while G type steel wire ring has large circle shape and smooth yarn channel, but the center of gravity is high, unstable operation and increased hairiness; O type steel wire ring has low center of gravity, but the channel is small, which is easy to block the yarn, resulting in increased hairiness and increased breakage rate; XGS type steel wire ring has a corrugated cross section, and the edge of steel wire ring during spinning It has smooth contact with yarn, easy heat dissipation, stable movement, no static electricity, and minimum hairiness.

Considering the one-sided reduction of dynamic friction coefficient, the circular section has the smallest dynamic friction coefficient, but its heat dissipation and operation stability are poor, which is not conducive to reducing hairiness; the rectangular section of steel wire ring is large, easy to heat dissipation, smooth movement, which is conducive to reducing the probability of hairiness.

Compared with the taper ring, the taper ring spins less yarn hairiness, because the curvature radius of the taper ring is larger than that of the plane ring, the contact area is correspondingly larger, the movement stability is good, it is easy to heat and wear, and the hairiness is less; compared with the fixed ring, the rotary ring spins less yarn hairiness, because the rotation of the rotary ring reduces the wire ring and the ring Compared with polished steel ring, hemp face steel ring has less hairiness, because when the steel ring is running on the hemp face steel ring, the friction force is stable, the degree of friction change is small, and the hairiness of the spun yarn is obviously reduced.

When the spindle speed is 17500r / min, the ceramic ring and steel ring developed by German Tec company can be used for 105 days without damage. In one cycle of ring and ring, the spinning tension fluctuates little, the tension is very stable, the friction force is small, and the hairiness of spinning yarn increases less. Porcelain plated steel collar has good heat dissipation, not easy to wear, good stability, small friction, not easy to scratch yarn.

Fluorine plated steel wire ring has a long service life. In the process of operation, it has small thermal wear and stable operation. Its air ring is easy to control, its maturity and decline period are shortened, and its stability period is prolonged. It can reduce the broken ends of spinning and the number of hairiness of spinning. The surface hardness of chromium plated steel wire ring is increased, its wear resistance is high, its maturity and decline period are short, its stability period is long, and its service period is long, which can reduce the hairiness of spinning.

The new matte ring has the advantages of high finish, good wear resistance, small friction coefficient, long service life, high fatigue strength, good heat dissipation ability, strong spinning adaptability, stable operation of steel ring, small frequency and amplitude of beat and vibration, wide channel, good stability, small tension wave of spinning, and obvious reduction of spinning hairiness.

The working surface of the new alloy ring is even and smooth, the surface roughness is consistent, the friction coefficient is stable, the operation is stable, the surface hardness is large, the heat resistance is good, and the wear resistance is good. There is a very thin self-lubricating layer on the surface, which makes the steel ring operate under the lubrication condition. The new ring does not need to go through the ripening period after getting on the train, which can reduce the yarn hairiness. In addition, electroplated steel ring, sulphurized steel ring, glass fiber reinforced plastic ring, steel ring made in Switzerland and ceramic steel ring made in the United States are all very effective in reducing yarn hairiness.

BC ring and steel ring belong to the multi-point contact of the lower support, with large contact area, good heat dissipation, small pressure, small wear, not easy to burn the steel ring, small stress, which is conducive to stable spinning tension, stable operation of the steel ring and reduction of spinning hairiness.

Bc6 type steel ring and steel ring have a long service life and few broken ends. Due to the friction of ring and steel ring, yarn hairiness is produced and increased significantly. In this case, super rolling steel ring technology developed to replace the traditional steel ring makes the sliding friction between ring and steel ring become rolling friction. As a result, yarn hairiness is significantly reduced.