Do Not Handle Cots To Ensure Quality And Efficiency.

< p > rubber rollers are important drafting parts of a href= "http://www.91se91.com/news/index_c.asp" > spinning frame < /a > drafting mechanism. They are the key spinning equipment.

The spinning machine mainly relies on cots and rollers to drafting the fiber bundles. The performance of the cots is closely related to the evenness of yarn evenness, the number of kilometre knots, the hairiness and breakage rate.

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< p > with the upgrading of textile grades, the production scale of < a href= "http://www.91se91.com/news/index_c.asp" > high yarn > /a > has gradually expanded, and the corresponding demand for cots has been increasing.

Therefore, it is necessary to rely on excellent spinning equipment to improve yarn quality, reduce labor intensity and reduce unnecessary consumption.

The appearance of the surface non treatment cots has further solved the above problems and improved the yarn quality more effectively.

At present, many textile enterprises have applied different degrees to non treatment cots, and studied its effect on reducing CV% value of yarn evenness.

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< p > < strong > the stability of the rubber roll is better than /strong > /p >

< p > cot is the key part of drafting mechanism and plays an important role in spinning process.

The strength of the grip jaw formed under the cradle pressure and the rollers form a round arc surface, so as to increase the contact area with the roller, add the toothed meshing, increase the friction between the rubber roller and the roller, reduce the slippage rate, shorten the length of the floating area, shorten the length of the floating zone, move the fiber speed point forward about 0.5 millimeters, and reduce the weak twisting area, thereby strengthening the grip force of the front roller, making the draft more stable, effectively controlling the edge fibers on both sides of the bar and effectively controlling the short fiber and the floating fiber dimension, so that the evenness of the yarn evenness and the nodule and hairiness of the yarn can be increased. Non treatment cots are of low hardness, good elasticity and vibration absorption.

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< p > non treatment cots are made from modified NBR.

Compared with the ordinary rubber roller, it has the characteristics of not easy to accumulate static electricity, excellent surface condition, strong immunity and durable.

The low hardness determines the large contact deformation of the front roller, the stable movement of the front jaw line, the uniform distribution of grip force, and the strengthening of the floating fiber control. The high elasticity determines that the rubber roller is recovered quickly, the stress is small, the balance can be maintained well in the operation, and the stability of the fiber is controlled.

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< p > no treatment cots are of low hardness and high elasticity. Under pressure, the jaws line corresponding to the grip of rollers can be widened, which can significantly enhance the grip of the jaws on the bars, satisfy the sufficient grip and stable drafting of the jaws, and keep the dynamic grip strength of the jaws relatively stable.

Under pressure, the jaws with rollers are relatively wide, so that the jaws line extends to both ends, causing both forward and backward movement.

The shift of the jaw line reduces the free interval, which is conducive to controlling the movement of floating fibers and improving the evenness of the evenness.

The non treatment cots are uniform in horizontal grip, strong in control of the fiber on the edges, and conducive to improving the yarn quality.

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< p > without considering the selection of cots, the comprehensive performance is mainly considered, that is, good elasticity, good antistatic performance, good wear resistance, aging resistance, adaptability and stability, so as to achieve the goal of improving product quality.

The non treatment cots are different from the ordinary cots, and their elasticity and wear resistance are better than that of the common rubber rollers with the same hardness.

Therefore, the range of spinning is not extensive. In actual production, different types of non treatment cots should be selected according to the different types of spun fibers.

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< p > < strong > < a > href= > http://www.91se91.com/news/index_c.asp > > material > /a > is the key to victory. < /strong > /p >

< p > in the process of cots, the surface untreated rubber rollers used excellent rubber, surfactants and some polar materials and polypropylene, polyurethane and phenolic resin, so that the surface of the cots after finishing was fine and smooth, and the wetting feeling was strong, and the moisture absorption and desorption properties of the cots were improved.

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< p > in the production process of rubber cots, the surface non treated rubber rollers used rubber species with a volume resistance between 1012~1015 ohms and centimeters. Conductive materials were added to the rubber compound to form an electron channel, so that the electrical conductivity of the cots was significantly improved and good resistance to winding was achieved.

Therefore, even if the paint is not used, the cots without treatment have good spinnability.

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< p > surface non treatment cots increase the grip width and improve the grip strength of the jaw.

Under the same pressure, the shift of the jaw line can reduce the length of the floating zone, and improve the evenness of the evenness. Therefore, it needs better elasticity, which makes the holding force relatively stable, and is more conducive to improving the yarn quality.

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< p > the surface is not treated with cots. After finishing, the surface is smooth and without attachments. The handle is soft and delicate. It maintains the original astringency and high recovery of the rubber, and has strong antistatic property in the spinning process.

Through a period of observation, we found that as long as the grade of cotton is not changed, the temperature and humidity are suitable and stable, the surface untreated cots are not wound around the ripening stage, and have strong spinnability and anti rewinding ability.

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< p > during the use of the surface, the surface treated rubber roller has intact elasticity and friction properties without any surface treatment. It forms a stable jaw with rollers, effectively holds the fibers, and makes the fiber change point closer to the jaw.

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< p > < strong > technology must continue to improve < /strong > < /p >

< p > > after repeated tests and Analysis on the spinning frame, and through a detailed observation in a period of time, we found that: the non treatment cots had strong anti recession ability, good surface aging resistance, small deformation, no concave, hardness, stable use, early, middle and later yarn evenness, CV%, 1000 knots, stable number, low 97 in the Ulster statistical value of about 25%, small spindle difference, continuous spinning cycle long, large spinning range, and grinding cycle up to 4~6 months, with a life span of up to 2~3 years.

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< p > on the domestic A802 grinder, the surface can not handle cots can be grinded by 80 big gas hole grinding wheels.

When the cots are sharpened, the surface is smooth and delicate, and the surface polarity is large. It can prevent the adhesion and winding phenomenon of mechanical force and non-polar grease caused by chemical bond force.

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< p > surface not treated cots surface has good hygroscopicity, low surface tension and good water solubility, strong moisture absorption, can prevent static electricity generation, reduce surface tension and prevent the formation of water mist on the cots.

In a word, not treating soft rubber cots plays a key role in improving yarn quality. It is an effective technical measure to improve yarn evenness and reduce the number of nodules.

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< p > however, there are still some defects in the domestic non treatment cots, which restrict the full play of its virtuous and benign and need to be improved.

First of all, it is to enhance the wearability of the cots, so that it has the ability of spinning and high spinning. It is necessary to increase the toughness of the inner layer of the cots and reduce the brittleness. The edge of the inner cots should be chamfered like the aluminum bushing cots to prevent the debris from entering the inner layer. Some of the cots will become black after long use. The industry should strive to solve the problem fundamentally from the aspects of the inner molecular structure and dispersity of the cots. After a period of use, some of the cots are worn seriously and the color of the cots is not uniform, affecting the appearance.

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