Advantages and disadvantages of siro spinning cotton yarn and its application innovation

Siro spinning is a spinning method that spins a yarn similar to a strand structure on a conventional ring spinning machine. It feeds two rovings with a certain spacing on the spinning machine, and after drawing, the front roller outputs the yarn. The two single yarn strips, and due to the transmission of the twist, have a small degree of twist on the single yarn strips, which are further twisted together into yarns that resemble one another and are wound on a bobbin. Siro spinning is also known as skein spinning, which is called A, B yarn in China.

Second, the advantages of Siro spinning

1. High yarn breaking strength; 2. High elongation at break; 3. Great reduction in hairiness; 4. Good wear resistance and anti-pilling properties; 5. Thickness and detail reduction; 6. Flying in the workshop Reduce; 7, save energy and labor; 8, less equipment investment;

Third, the comparison between Siro spinning and ring spinning

1. Improvements

This is because Siro spinning is fed by two rovings and merged in the draft zone. Therefore, the dry and coarse details have been improved to varying degrees.

2. Improvement of hairiness

This is because single yarns are first lightly twisted in the spinning triangle and then twisted. The sliver has become a cylinder at the main twisting point, which helps the fiber end to wrap into the yarn body.

3, a strong increase

It is because the sliver has a triangular twisting zone at the front roller output. The slivers are tensioned together to form a double-center sliver that resembles a strand. When the force is applied, the two slivers are pressed against each other. Fibers do not slip easily, and have low hairiness and high fiber utilization. Therefore, they are strong and strong.

Fourth, Siro spinning problems that are prone to occur

1, before the sliver is too thin, easy to produce accidental draft;

2. The details of yarn increase, the more fine the yarn increases, the more obvious;

3, increased yarn breakage, reduced production efficiency.

V. Siro spinning end treatment

Since Siro spinning is fed by two slivers with a certain spacing into the draft zone of the spun yarn, they are twisted and then twisted into yarns. There is a situation in which the two slivers have a broken yarn and another running single yarn. In the case of a stable spinning tension, the head is continuously turned into the wrong yarn, and in order to guarantee the spinning quality, a siro spinning single yarn interrupting device must be installed, and after a broken end, the interrupting device can play another single yarn. Broken.

Sixth, the key points of the ring spinning machine modified Siro spinning

1, to increase the number of roving feeds, roving racks to be modified;

2. The double-slot structure with a certain distance shall be changed from the single head to the rear, middle and front yarn-covering cotton collectors;

3, the original inverted yarn traversing device was abolished, instead of fixed inverted yarn;

4, to install roving breakage stop device to prevent a single roving feed;

5, because usually the strands are S, so Siro spinning is also used S production, spindle drive should be changed accordingly;

6. It takes about 100,000 yuan to modify each car (generally, the ring spinning machine can be converted to a Siro spinning machine);

7. The modified spinning machine can be easily returned to the original ordinary ring spinning machine as needed.

Seven, the price of siro spinning in the market

Cotton, polyester-cotton series

1, 8S-16S siro spinning price = ring spinning price + 500 yuan

2, 16S or more Siro spinning price = ring spinning price + 500 yuan -1000 yuan

VIII. Main uses of siro spinning in the market

1. The initial purpose of siro spinning is for wool spinning;

2, mainly wool, wool polyester, acrylic pure spinning or blending;

3, now mostly used for plain cloth, denim, etc.;

4, applied to shirts and spring and summer clothing fabrics.