New and unique air-jet spinning
New and unique air-jet spinning
Air-jet spinning is a new type of unique spinning yarn and is a hot topic in the domestic textile industry today. Air-jet spinning is molecular feeding. After high-power drafting by four rollers and double apron, the spit out strands directly enter the nozzle. The nozzle passes compressed air to falsely twist the strands and wrap them into yarn, which is then led out by the yarn take-up roller. The yarn clearer is wound onto the yarn cone to form the cone. It can be seen that front spinning can save the yarn rental process, and post spinning can save the winding process.
The newly launched Plytil2000 air-jet spinning machine from the German company SUSSEEN has undergone major improvements. It integrates high-power drafting, spinning, doubling and twisting, and winding into one, forming the so-called double-strand doubling air-jet spinning. In this way, the three processes of yarn doubling, twisting and winding are eliminated in post-spinning. The biggest advantage of air-jet spinning, in addition to eliminating several processes, is that the output is extremely high. The spinning speed can be as high as 300 meters per minute, which is 10 times that of ring spinning. In short, 8 air-jet spinning units are equivalent to 10,000 Ring spinning. It is equipped with a very reliable splicing trolley that can automatically splice. These paved the way for the labor-intensive textile industry to move towards technology-intensive continuous automated production, and set an example for the technological renewal of the older textile industry. The “unmanned spinning factory” that people dream of will become a reality.
The characteristic of air-jet spinning is the production of fine special yarns (high count yarns), which can be adapted to pure spinning and blended spinning of natural fibers, synthetic fibers, and cotton-type chemical fibers. However, spinning pure cotton is difficult. Recently, Murata Company in Japan has promoted that “it can spin pure cotton.” Cotton but not recommended”. Don’t believe ambiguous words. So far, no one in China uses air-jet spinning to spin pure cotton.
In the comprehensive evaluation of the quality of air-jet spinning products, except that the yarn strength is 5% to 20% lower than that of ring spinning, other quality indicators are much better than ring spinning. Compared with ring spinning, the production rate is about 2% higher, the amount of raw materials and raw material costs need to be reduced by 0.4% to 1.5%, maintenance and air conditioning costs are reduced by 30%, and the electricity consumption is higher than that of ring spinning, but spinning 60 inches When the count is above 100%, the electricity consumption will be lower than that of ring spinning. Overall, the production cost will be reduced by more than 30%. In addition, indicators such as labor per thousand spindles, floor space, dust content and noise in the workshop are also much better than those of ring spinning. .
The yarn produced by air-jet spinning is particularly suitable for the weaving of new looms such as rapier and the production of 10,000 meters of knotless sewing thread. The fabric properties of air-jet spinning are also its strengths, such as abrasion resistance, tensile strength, air permeability, dyeability, tearing strength, thickness and stiffness, etc., which are better than those of ring-spun fabrics.
Japan’s Murata Company monopolizes the international air-jet spinning market. Within a few years, Japan’s Toray and Germany’s Suessen have successively launched air-jet spinning with their own characteristics. Air-jet spinning has also experienced a saddle-shaped economic development pattern. It is reported that my country now has 9,000 heads (generally 72 heads per unit), and a total of 600,000 to 700,000 heads in the world, of which more than 70% are concentrated in the United States, which has high wages and high consumption. , because it is adapting to the substantial reduction of labor force and satisfying the American market that pursues high-quality and new-style textiles, so as to obtain high profits.
It is an indisputable objective fact that air-jet spinning of pure cotton is difficult, but we must look at it comprehensively. We cannot arbitrarily say that it is not the direction of development based on this point, and miss an opportunity for the advancement of textile science and technology. Nowadays, new spinning raw materials are constantly emerging, and their replacement frequency is getting faster and faster, and the speed has become difficult to keep up. How to optimally select and combine new spinning raw materials for processing is therefore a major issue for various textile companies, and air-jet spinning has just adapted to the trend of continuous updating and substitution of spinning raw materials.
The price of each air-jet spinning machine is as high as more than 200,000 US dollars, which is not a small number. When updating spinning equipment such as the trough machine and the drum machine, whether to choose a new ring spinning machine and an imported automatic winding machine or an air-jet spinning machine is a question that needs to be carefully considered. The big issue under discussion is that the inherent weaknesses of ring spinning limit its ability to significantly improve product quality and spinning range. Some current improvements only improve starting performance and reduce end breakage rates. Therefore, it is recommended to be comprehensive and objective. We conduct on-site investigation and comparative analysis to continuously revise the technical transformation plan, strive to create brands and patents as products, and enable enterprises to gain advantages. REL6Z4X2
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