New Card Clothing Reduces NEP 30%~40%

< p > carding is the most effective process to reduce NEP content, and is also the most influential process on yarn neps.

Some textile enterprises have tested the NEP content in each process of raw cotton to roving with AFIS-N NEP detector. The results show that the neps can be reduced to 80 grains / gram, which is 20% of the neps in the cotton batting.

Under the same conditions, using new card clothing, yarn neps can also reduce 30%~40%.

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< p > < strong > new card clothing improves yarn quality < /strong > < /p >

< p > with the rapid change of market demand, the frequency of textile enterprises changing varieties is also increasing.

Because many enterprises can not choose the card clothing correctly, even if the new type of needle clothing is applied, it can not play a good role.

In this case, some domestic spinning enterprises have developed "universal metal card clothing".

The design of the working angle of the card clothing takes into account the requirements of chemical fiber and cotton. The adaptability is relatively flexible, to a certain extent, it can meet the needs of the modified varieties.

However, this is only an expedient measure and can not really solve the problem of "matching seats" for card clothing and yarn varieties.

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< p > foreign clothing manufacturers have made some explorations and made some achievements in this regard.

For example, a few years ago, Graff launched a newly developed camel card clothing.

The new needle clothing is very similar to the camel's hump. It is usually used as a cylinder linen on the flat type short fibre carding machine, but also as a needle roller clothing.

Camel's Xilin card clothing's hump shape design is different from that of the general metal card clothing. The surface of this kind of camel's camel's hump will form an obvious supporting action on the airflow, so that the fiber can remain on the surface of the cylinder linen and prevent the fiber from sliding toward the needle cloth, thus improving the ability of the fiber's comb and pferring to the doffer.

This new type of clothing can eliminate immature fibers, dead fibers and knots.

The camel's clothing is less than ordinary plain clothing, so fiber damage is less, which makes short fiber down.

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Xilin metal card clothing of camel carding machine (P) is suitable for all kinds of carding machines. It is a new development of new card clothing for carding machine.

At the same time, it can also be applied to the thorn roller. Its advantage is that the tooth shape of the hump needle clothing can improve the pfer of fibers between the roller and the cylinder, because the fibers and impurities are kept on the surface of the needle roller, so that the number of impurities can be increased.

Such immature fibers and dead fibers are discharged early before they enter the feeding part of the carding machine.

(if this kind of immature and undesirable dead fiber is not discharged early, it will have a negative effect on the knitted fabric or machine weaving process, so that the fabric will have neps or pverse defects.

Camel type Xilin and pin roller metal card clothing can make the fiber processed well when carding machine, so that the neps of downstream products can be significantly reduced.

Practice shows that the positive and rational selection of new advanced card clothing is an important factor in developing high performance carding machine, which can further improve the < a href= "http://www.91se91.com/news/index_c.asp" > product quality < /a >.

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< p > < strong > fixed flat clothing reduces neps < /strong > /p >

< p > at present, many new and domestic a href= "http://www.91se91.com/news/index_c.asp" > carding machine < /a > have been installed in front of the Xilin part of the front and back fixed cover, in order to improve the carding machine's ability of removing impurities, and make up for the lack of carding degree due to the growth of Xilin.

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< p > between the cylinder and the cover plate is the main combing area of carding machine. The fibers can be separated carefully and fully, and the neps are combed or removed.

The modern carding machine is equipped with an airflow miscellaneous system matched with a fixed cover plate, which ensures the realization of the functions of combing and removing fine impurities in fixed cover boards, and further purifying the cotton web.

However, the installation of the front and rear fixed cover plates is not without conditions. The necessary conditions for the installation of the front and rear fixed cover plates are that the position of the fixed cover plate at the front of the machine must be matched with the air flow impurity removal system to form a fixed comb and impurity removal system.

The system is generally made up of fixed cover plate, dust removal knife and air suction system.

For example, the C70, TREX, MK7, TC-11 and TC-06 AWE system of the carding machine for the high-powered carding machine are different, but their basic principles and functions are the same.

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< p > compared with ordinary carding machine, the new high production carding machine with fixed carding and impurity removing system has a more significant effect on eliminating the impurity of cotton web.

The practice shows that under the condition that the total root number of the cover plate is constant, the increase of the number of the fixed cover plate and the reduction of the movable cover plate are more obvious.

At present, the number of fixed cover plates of some high-yield carding machines has reached 27 or so, and the NEP content of the sliver can be reduced by about 31% than that of the ordinary carding machine.

Some foreign textile experts have predicted that all future carding machines may all adopt fixed cover plates, and the movable cover plates are expected to be abolished.

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< p > Lida C70 high performance carding machine has increased 32 active covers on the basis of the original total cover plate number. The C70 combing area has increased 40% of the carding ability of the C60 carding machine, which is 60% higher than that of the ordinary carding machine.

The performance of Lida C70 high performance carding machine is 40% higher than that of C60 carding machine under the condition that the quality or quality of the same sliver is better.

This remarkable improvement is based on the automatic grooming cover card, which ensures the precision carding between the cover plate and Xilin. The minimum distance between the cylinder liner and the cover card clothing is 0.1 millimeters. The precision cover carding movement improves the carding quality and improves the clearance system of the cover plate.

Because the speed of the cover plate is independent of the speed of the tin forest, the speed of the cover plate can be adjusted stepless, so that the utilization ratio and impurity removal efficiency of the carding machine are optimized.

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< p > < strong > < a > href= > http://www.91se91.com/news/index_c.asp > > clothing > /a > maintain and improve the quality of products < /strong > /p >

< p > the card clothing matching of carding machine is also important.

Some advanced high production carding machines abroad, such as TC-11, TC-06, TC-07, C60, C70, MK7, etc., require very high accuracy for mechanical equipment.

Most of these carding machines need to finish machining, balancing and eliminating internal stress after the rolling of steel plates. The radial beating requirement is below 0.03 mm.

TC-11, TC-06, TC-07, C60 and C70 are also equipped with fine adjustment cover tin Lin spacing and online automatic grinding system (automatic grinding cylinder, flat card clothing), cover plate gauge adjustment system, high accuracy, automatic grinding cover plate grinding needle tip and grinding side, so that it keeps the sharp edge of the original card clothing.

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< p > under normal circumstances, after the production of 200 tons of ~1000 tons of cylinder clothing, the replacement of raw materials should be replaced.

After on-line grinding, the quality of the product can be maintained stable, and the service life of the card clothing can be prolonged by 10%~20%.

With the increase of grinding cycle, the NEP content of the sliver also increased correspondingly.

In general, NEP content of new needle bars is about 50 grains per gram, and the NEP content of the needle bar is 65 55~60 per gram per year. The NEP content is 75 g / g.

The data show that the honing cycle of the carding machine is not too long. Under possible conditions, the short grinding cycle should be minimized so as to maintain the NEP content at a lower level and improve the quality of the sliver.

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