Vortex spinning is a new type of spinning method that u […]
Vortex spinning is a new type of spinning method that uses a fixed vortex spinning tube instead of a high-speed rotating spinning cup for spinning.
In a sense, vortex spinning is the real air spinning. The fiber strip is fed by the feed roller, and is opened into single fibers by the spur roller, and is fed into the vortex tube at high speed from the cotton conveying pipe by the action of the air flow. The vortex tube is composed of a core tube and an outer tube. Three tangential air inlets are opened on the outer tube, and the lower end is connected to a blower. The fan continuously draws air from the tube. The outside air enters the vortex tube along the air inlet and generates a vortex-like air flow. When the air flow that rotates upward reaches the core tube, it merges with the fibers entering the cotton pipe, forming a condensed fiber ring along the inner wall of the vortex tube, and steadily rotates around the axis of the vortex tube at high speed to twist the fiber into a yarn. The yarn is continuously drawn out from the yarn guide hole by the drawing roller and wound into a package.
The main feature of vortex spinning is the elimination of spinning components that rotate at high speed. Due to the use of air-twisting to get rid of the problems of rotational inertia and bearing load caused by high-speed twisting components (such as the rotor of air-jet spinning), there is also the problem of increasing the spinning tension due to the balloon formed by the spinning (such as Ring spinning). Compared with other new types of spinning, vortex spinning has several advantages:
1. Fast speed and high output
The spinning speed of the vortex spinning machine is 100_200m / min, and the practical speed is generally 100-160m / min. Domestic spinning vortex spinning machine is used to spin 6_12 inch count yarn, the spinning speed is 100-140 m / min, the output is 600-800 (kg / thousands • h), which is equivalent to 4_5 times of ring spinning yarn; For count acrylic yarn, 10 sets (192 heads / set) PF-1 vortex spinning machine are used, and the output is up to 400 kg / h. This is equivalent to the output of 20 (4000-end) BD-200 air-jet spinning machines and the output of 16320 spindles of 40 ring spinning machines. The output of one vortex spinning head is equivalent to the output of 2.08 air spinning heads or 8.5 ring spindles.
2. Short process flow and high production rate
Vortex spinning is directly spun with fiber slivers to make package yarn, so like other new types of spinning, the two processes of roving and winding can be omitted. Due to the low end breakage rate of vortex spinning, the loss of florescence is low, and the production rate is as high as 99%.
3. Strong spinnability, suitable for raising products
Vortex spinning can spin fibers with a length of 38_60_ long, pure and blended cotton and chemical fibers. The structure of the yarn is relatively bulky, so its dyeability, slurry absorption, and air permeability are better, and the pilling resistance and wear resistance of the yarn are also better. The yarn count range is limited to medium and low count yarns, which is suitable for raising products. For example, 38_long chemical fibers (acrylic, chloroprene, viscose, etc.) are spun 6_12 British yarn, woven into velvet, trousers, scarves, cushions, sand releases, furniture cloths and small table cloths, etc .
4. Simple operation and convenient joint
Vortex spinning uses vortex tube to form yarn. Because the vortex tube is stationary and has no high-speed rotating parts, the joint is very convenient and simple. No cleaning is required after the end is broken, which improves the working environment. No special requirements for front spinning equipment, temperature and humidity. Because vortex spinning has no high-speed rotating parts, there is no problem of high-speed bearing lubrication, less wear and tear, less noise, and easy maintenance. Production practice shows that there are some limitations in the development of vortex spinning.