Zhejiang: Vortex Spinning Should Benefit First.

Spinning technology < /a >, it omitted the traditional ring spinning roving and winding process, the output of single spindle is 15~20 times of ring spinning, and the yarn yarn consumption is more than doubled than that of ring spinning. It has the characteristics of short spinning process, high production efficiency and low labor consumption. At the same time, the equipment is intelligent and highly automated, and the production process realizes on-line quality monitoring. Therefore, the needle woven cotton fabric produced by air-jet vortex spinning has good properties such as less fabric, less hairiness, good abrasion resistance, good anti pilling, good color, moisture absorption and quick drying. It is gradually welcomed by post processing enterprises and users, and it can get better economic benefits for enterprises. < p > jet vortex spinning is the latest a href= "http://www.91se91.com/news/index_c.asp" in the field of spinning.

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< p > data show that by the end of 2013, there were 800 air-jet spinning equipment imported and put into operation, and more than 700 tons of eddy current gauze produced daily, with an annual output of about 200000 tons.

Due to the rapid expansion of production capacity, and the development of product development and subsequent processing purposes have not yet been kept up, the homogenization competition of products has been highlighted. The prices of main product yarn, such as pure viscose yarn, T/R yarn and so on, have been decreasing, some of which are even the same price as ring spinning and even slightly lower than ring spinning.

Jet vortex spinning technology can not achieve good economic benefits for enterprises, and has become a "heart disease" of some enterprises.

How to change the situation of jet vortex spinning is becoming a problem that enterprises should consider in the new year.

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< p > < strong > how to make use of the advantage of air-jet vortex spinning to avoid homogenization competition? < /strong > < /p >

At present, China's textile industry is developing at a fast speed, with the overcapacity of the main road products and fierce competition. P

Vortex spinning, as a new spinning technology, has advanced quality control methods. The enterprises using vortex spinning should set a good product positioning according to the market demand, change the current large-scale production of viscose yarn, T/R yarn, and compete with the rotor spinning and ring spinning market, and give full play to the technical advantages of vortex spinning to avoid the homogenization of products.

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At present, many spinning enterprises in Zhejiang province have made a welcome step in developing new yarn such as multi fiber blended yarn and colored spun yarn according to market demand.

For example, the "cool yarn" developed by Hongyang group is a polyester and hemp blended yarn with three characteristics of comfort, coolness and bacteriostasis.

The colored ice yarn is made of three kinds of raw materials, namely, hollow polyester, coffee carbon and modal. The yarn has good thermal insulation function.

For example, the three kinds of air-jet vortex spinning lines developed recently by Weida group are very distinctive. "Wei Wei yarn" is a product of upgrading conventional T/R yarn with black viscose and colored polyester.

"Weier yarn" is a blend of two kinds of fibers, namely colored modal and natural modal. The "Wei polyester yarn" is a polyester linen grey yarn blended with colored polyester and natural polyester.

Because these three kinds of yarns are colored spun yarn, no stain is needed after processing, which reduces environmental pollution and is generally welcomed by post processing enterprises. At the same time, it also brings good economic benefits to enterprises.

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< p > < strong > how to set up the scale of the enterprise to maximize the benefit? < /strong > < /p >

< p > enterprises that use jet vortex spinning technology believe that the larger the production line is, the better the machine will be.

It is true that the larger the scale, the more labor-saving, the more advanced the machine, the higher the production efficiency.

However, for the current vortex spinning technology, the larger the scale of the enterprise is, the greater the benefit it will generate.

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At present, there are mainly two development models of the air jet spinning enterprises in China, P.

One is to win by scale, and one enterprise has nearly 100 or even more than one hundred jet vortex spinning machines. Most of the former spins are equipped with imported blowing carding machines and drawing frames. The enterprises of this mode are advanced in automation and intelligent in automation.

Another mode is that the scale of the enterprise is small, and the jet vortex spinning machine is generally in 20~30 station, and the product is diversified.

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< p > the first mode saves labor and produces high efficiency. However, the product variety is limited by equipment allocation, so it is difficult to change and tend to homogenization.

And the second mode is flexible because of product strain, which can bring more benefits to enterprises.

Such as Zhejiang Ao Hua textile company, at present, the company has only 30 vortex spinning equipment, but the front spinning has 6 production lines, which greatly improves the product's ability to respond, and has new products launched every year, which has created good economic benefits for enterprises.

Therefore, it is not suitable for the jet spin spinning enterprises to achieve the maximum benefit, and the scale of the ring spinning is not suitable. The scale of the enterprise and the configuration of the pre spinning equipment should consider the strain capacity of the product.

If we want to build a large scale enterprise, we should also make reasonable planning, so that each workshop has its own characteristics.

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< p > < strong > how to configure the spinning equipment of jet vortex spinning to ensure the yarn quality? < /strong > < /p >

< p > jet vortex < a href= "http://www.91se91.com/news/index_c.asp" > spinning process < /a > shorter than ring spinning, but the requirement for equipment is higher, especially the configuration of the former spinning equipment, which is related to whether it can provide high quality cotton sliver for air-jet vortex spinning, requiring less damage to the fibers in the processing of the former spinning equipment, and the fiber's straightness, parallelism and separation.

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< p > at present, there are two models for the pre spinning configuration of domestic air jet spinning enterprises.

One is the introduction of the foreign blowing carding unit and the high-speed drawing frame, and the other one is the domestic blowing carding unit and the traditional cotton cleaning, carding and drawing frame.

These two modes are available in spinning enterprises in Zhejiang province. Through several years of production practice, it is found that the first configuration equipment has high production efficiency and few matching units, and the output of the carding machine is 60Kg/h~70Kg/h, and the speed of drawing frame is 450m/min~500m/min.

The second configurations have more equipment, and the production efficiency is slightly lower than that of imported equipment. The output of the carding machine is 40Kg/h~50Kg/h, and the speed of drawing frame is 300m/min~350m/min.

However, from the analysis of yarn quality, high speed can not achieve high quality, especially the fiber strength which is processed on the jet vortex spinning machine is generally low. The high carding machine's strong combing is easy to damage the fibers, and easily increase the neps and other defects. The high speed of the drawing frame will also cause the fiber's straightness, parallelism and separation degree to be reduced.

Therefore, Murata of Japan suggested that the speed of drawing frames used for vortex spinning should be controlled at regular 70%.

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< p > at present, there are 18 manufacturers of jet vortex spinning in Zhejiang Province, and the shortage of foreign equipment in the former spinning is 1/3. Most of the enterprises are equipped with homemade spinning equipment. This is also one of the reasons for the quick response ability of the products.

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< p > < strong > how to improve the weak links of jets less than a href= "http://www.91se91.com/news/index_c.asp" > vortex spinning < /a > expand the application field? < /strong > /p >

< p > for example, the strength of air-jet vortex yarn is 80%~90% of ring spinning, evenness of yarn evenness is slightly worse than that of ring spinning. It is easy to produce cotton joints, and the breakage rate of 1000 spindles is higher than that of ring spinning, and the yarn number also has certain limitations.

At present, the proportion of air-jet spinning in yarns is still small, mainly used in knitted fabrics, and the application scope is narrow.

Therefore, overcoming some weak links in eddy current yarn technology and expanding its application fields is also a research topic for the sustainable development of jet vortex spinning capacity.

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< p > from Zhejiang's production practice in recent years, it is easy to find that to overcome the weak links of air-jet vortex yarn, we should start with the preferred raw materials.

The size of the selected chemical fiber should be fine and the length should be long. When using cotton, the evenness should be improved through the combing process, or the number of roots of the yarn section should be increased, which is conducive to the enhancement of yarn strength.

Next, we should use multi fiber combined spinning to complement each other.

Thirdly, it is necessary to optimize the process configuration of the spinning equipment, optimize the design with the reasonable speed and quantity, and maximize the extent of the design. In particular, it can not be partial to the high speed. The higher the speed, the worse the coating effect is, and it will worsen the yarn evenness.

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