Introduction
“Ring spinning”, “air spinning”, “siro spinning” …Do you understand these different ways of spinning?
1. Ring spinning:
Ring spinning is It is the most commonly used and most versatile spinning method on the market today. Ring spinning means that the drawn fiber strips of the sliver or roving are introduced through the rotation of the ring traveler. The bobbin winding speed is faster than the traveler, and the cotton yarn is twisted into spun yarn. It is widely used in the spinning of various short fibers. yarn engineering. Such as carded, combed and blended spinning, the traveler is driven by the bobbin through the yarn strip to rotate around the steel ring for twisting. At the same time, the friction of the steel ring makes the rotation speed slightly smaller than the bobbin and is wound. The spinning speed is high, and the shape of ring-spun yarn is a conical spiral in which most of the fibers are transferred internally and externally, so that the fibers are wound and connected internally and externally in the yarn. The yarn has a tight structure and high strength, and is suitable for thread making, weaving and knitting, etc. Various products.
Ring spinning (combing) process:
Cleaning–carding–pre-drawing–striping–combing–drawing–roving–spun yarn–winding
Ring spinning (carded) process:
Cleaning – carding – drawing – roving – spun yarn – winding
2. Air-end spinning:
Air-end spinning does not use spindles and mainly relies on opening rollers and spinning rotors. , false twisting device and many other components. The opening roller is used to grab and comb the fed sliver fibers, and the centrifugal force generated by its high-speed rotation can throw out the grabbed fibers. The spinning cup is a small metal cup. Its rotation speed is more than 10 times higher than that of the detangling roller. The resulting centrifugal effect discharges the air in the cup outward; based on the principle of fluid pressure, the cotton fibers enter the airflow cup. , and form a fiber flow, which continuously moves along the inner wall of the cup. At this time, there is a yarn end outside the cup, which draws out the fibers on the inner wall of the cup and connects them. In addition, the cup rotates with the yarn tail at high speed, which is like “feeding” the cotton fiber while adding yarn. The thread is kneaded to connect the yarn to the fiber on the inner wall of the cup, and is stretched under the winding tension of the yarn tube to continuously output the yarn to complete the process of air-jet spinning.
Characteristics of open-end spinning
Open-end spinning has high speed, large yarn volume, wide adaptability, simple mechanism and no need for spindles , steel rings and travelers, which can double the production of spun yarns.
3. The difference between air-end spinning and ring spinning:
Air-end spinning and ring spinning One is new textile technology and the other is old-fashioned spinning technology. Open-end spinning is air-jet spinning, while ring spinning is mechanical spinning, which uses spindles, steel bells, and travelers for twisting, and rollers for drafting. In open-end spinning, the fiber is transported by air flow and is held and twisted by one end. Generally speaking, ring-spun yarn has less hairiness, higher strength and better quality. The open-end spinning process is short, the raw material is more short velvet, the yarn is wooly, the count and twist cannot be very high, and the price is also low.
In terms of yarn structure, ring spinning is relatively compact, while open-end spinning is fluffy and rough in style, suitable for making denim fabrics. Open-end spinning yarn is generally thicker.
4. Air-jet spinning:
Air-jet spinning uses high-speed rotating airflow to twist the yarn. A new spinning method of yarn. Air-jet spinning uses cotton sliver to feed, four rollers and double short aprons for super large draft, and is twisted into yarn through a fixed nozzle. After the yarn is drawn out, it is wound onto the yarn cone through the yarn clearer and directly wound into cone yarn.
Air jet spinning can spin 30-7.4tex (20-80 British count) yarn, and is suitable for pure spinning and blending of chemical fibers and cotton. Due to the special yarn formation mechanism of air-jet spinning, the structure and performance of air-jet yarn are significantly different from ring-spun yarn, and its products have a unique style.
Air-jet spinning and its Product features:
a. High spinning speed. Air-jet spinning uses air twisting and does not have high-speed rotating parts (such as travelers in ring spinning), achieving high-speed spinning. The spinning speed can reach 120-300 m/min. The output of each head is equivalent to that of each ring spinning spindle. 10-15 times.
b. The process flow is short. Compared with ring spinning, air-jet spinning requires two less processes: roving and bobbin, saving about 30% of the factory area. Compared with ring-spun yarn, the number of workers per 10,000 spindles is 90, a reduction of about 60%. The machine material consumption is about 30% lower than that of ring-spun yarn. Daily maintenance costs and maintenance workload are also reduced.
c. The products are of good quality and distinctive. The comprehensive evaluation of the quality of air-jet yarn is good. Except for the yarn strength which is 5-20% lower than that of ring-spun yarn, other quality indicators are better than that of ring-spun yarn. The physical properties of air-jet yarn, such as evenness CV value, coarse details and yarn defects, are better than those of ring-spun yarn. The hairiness above 3mm is less than that of ring-spun yarn. Although the yarn strength is lower, the strength unevenness is lower than that of ring-spun yarn. It is suitable for the weaving of new looms such as rapier looms and air-jet looms, and can increase the production efficiency of the loom by more than 2%.
In addition to being similar to ring-spun yarn, the quality of air-jet spinning also has its own uniqueness. The friction coefficient of air-jet yarn is large, the yarn is directional, and its friction performance is also directional. sex. The wear resistance is better than that of ring-spun yarn, but the hand feel is�.
8. Comparison between siro spinning, compact spinning and compact siro spinning:
a. Siro spinning is a spinning method that spins yarn with a ply-like structure on a traditional ring spinning machine. Siro spinning technology was first applied to wool spinning, and then gradually applied to cotton spinning. Siro spinning uses two rovings fed from the bell mouth. The two rovings are still separated in the front and rear drafting areas. After outputting a certain length from the front nip, they are combined and twisted by the same spindle to form a double sliver. Strand structure characteristics of Siro yarn. The synchronous twisting in the same direction of Siro spinning gives the yarn a special structure. The fibers on the surface of Siro spinning yarn are neatly arranged, the yarn structure is tight, the hairiness is less, and the resistance to pilling is good. Compared with stranded fabrics, Siro fabrics have a softer feel and are smoother. Siro spinning can be used for woven fabrics and knitted fabrics, and can also replace strands for high-count and high-density fabrics.
b. Compact spinning technology is a new type of ring spinning technology based on traditional ring spinning. Simply put, it is a spinning technology that densifies the fibers output by the spinning machine after drafting. That is, by adding an air suction device before the strands are twisted, and through the control of negative pressure, the loose fibers are gathered and cohesive, and the fibers are controlled The area is fully straightened and the twisting triangle area on the traditional spinning machine is reduced, so that the fibers can be twisted in a parallel and tight state. Since the fibers in the slivers are evenly stressed and tightly interlocked, the yarn structure and quality are comprehensively improved, and the hairiness, strength, evenness, wear resistance, and yarn appearance are significantly improved.
c. Compact Siro spinning is a combined process spinning method that combines compact spinning and Siro spinning. The yarn spun by this technology combines the two The excellent characteristics and quality of the spinning method. Compared with traditional ring-spun single yarn and siro yarn, compact siro yarn has less hairiness, higher strength, and has the plying effect of siro spinning. It is the best choice for spinning high-end fabrics. Ideal raw material with good development prospects. </p
