The factors that affect spinning production capacity include equipment, technology, operations, raw materials, environment, etc. Equipment is the foundation, technology is the guide, operation is the guarantee, and raw materials must Reliable and stable environment.
01 device
Equipment is the foundation, and good equipment is the guarantee of product quality. The equipment work mainly focuses on striving to improve the status of the equipment, and adopts measures such as zoning, grading, and model machines to reduce breakages per thousand spindles. When controlling thousands of spindles, the number of broken ends should be within 8 strands of cotton and within 5 strands of rayon. Adjust the distance of the wire ring cleaner appropriately according to the type. The cleaner should not be loose or have burrs. Choose high-quality rubber rollers and aprons. Currently, using high elasticity and low hardness rubber rollers is an important way to improve yarn quality and reduce end breakage. Regularly wash and grind the rubber rollers to check for eccentric bending, and divide them into grades, zones, and sections. When using it, the apron rings should be cleaned and replaced regularly, and be careful not to use new ones on the upper and lower apron rings at the same time. The cot roller grinding cycle is formulated for special varieties. For Rokas mechanical compact spinning, it is easy to cause the front cot roller to be dented, resulting in difficult work, large-area end breakage, and a significant increase in the number of cuts per 10,000 meters of winding. By constantly adjusting the cycle, our company spins 14.58 tex in a compact, back-grinding process once a month, and the rubber rollers are turned around once every half month.
The mechanical head breakage determines the number of machine stops when the machine spindles thousands of spindles. If The number of broken ends when the machine spins 1,000 spindles is reduced by 50% on the original basis, and the number of car stops by the car stopper can be increased by 25%. In the situation of labor shortage in the textile industry, it can not only solve the labor shortage situation, but also save enterprise costs.
02 process
Speed
Speed is the main factor affecting the output of spinning yarn. The speed should be increased on the premise of ensuring stable life in the workshop, reaching the standard number of ends per thousand spindles, not affecting product quality, and meeting customer requirements. The fluctuation speed of the raw material should also change accordingly. When the raw material has good maturity, low lint content and long main body length, the speed can be increased. When the traveler used is lighter, the speed can be increased appropriately. The speed also varies depending on the variety. Generally, the speed of siro spinning is about 10% lower than that of single yarn. In addition, the spindle speed is directly proportional to the hairiness. When the spindle speed exceeds the critical value, the hairiness of the yarn increases significantly.
Twist
The twist of the spun yarn is also a key factor affecting the output. For example, the design twist coefficient of the C 29.2 tex variety has been reduced from 410 to 398, and Taiwan’s production capacity has increased. 3.2%. The production quality data are shown in Table 1.
Table 1 Product quality data at different design twists
It can be seen from the table that appropriately reducing the twist coefficient can increase output. Of course, if the twist coefficient is too small, the strength will be reduced and the hairiness will be increased. The choice of spinning twist coefficient mainly depends on the final customer’s requirements for the type and quality of spinning yarn. Excessive twist coefficient will make the yarn surface feel hard and reduce the spinning productivity. The twist coefficient of roving also has a certain relationship with the quality of spinning yarn and the breakage of spinning yarn. Appropriately increasing the twist coefficient of the roving is beneficial to the control of fibers in the drafting area of the spinning yarn, improving the yarn evenness, and preventing the formation of details due to accidental drafting during the unwinding process of the roving. However, an excessively high twist coefficient will often result in poor drafting of the spun yarn, an increase in thick details, or even failure to draft, causing a large number of ends to break, thereby affecting the output of the spun yarn. Therefore, the roving twist coefficient must also be selected reasonably.
Selection and equipment of ring travelers
The usage time and life cycle of the steel ring traveler, the model of the traveler and the matching conditions with the steel ring will all Affects yarn breakage. When the ring shrinks and the balloon ring expands, it is easy to hit the gauze plate, causing increased hairiness. The type of traveler must match the steel ring. When the ring type does not match, it is easy to cause flying travelers and increase breakage. Only by selecting appropriate steel ring travelers for different yarns can hairiness be effectively reduced and ends broken. The weight of the traveler also has a certain impact on the yarn breakage. When it is too heavy, the wire ring is heavy and the tension is high, and the yarn will break more often; when it is too light, the wire ring is light and the balloon ring is large, making it easy to break the yarn board. , the yarn has many broken ends. The general principle of arranging the weight of the traveler is: try not to touch or lightly touch the yarn separation plate with small yarns, and do not rub the bobbin head with large yarns.
The diameter of the steel ring affects the spinning speed. The following diameters are used: Comparative data on the product quality of C 36.4 tex varieties of 48 mm and 54 mm steel ring spinning are shown in Table 2.
Table 2 Effect of ring diameter on yarn quality and spindle speed
After testing, it was also found that with a diameter of 38 mm The ring spinning C 18.2 tex can increase the spindle speed by 500 r/ compared with the ring with a diameter of 40 mm.p align=””>
Adopt electromechanical integration and implement computer online monitoring. Since 1999, all the spun yarns of our company have been connected to the computer center. The operating dynamics, output and process parameters of the trolley are clear at a glance, and the machine spinning dynamics can be grasped in real time for easy control and management.
In short, there are many factors that affect production capacity, including machinery and equipment, processes, and operations. In other aspects, increasing production capacity and obtaining greater profits is what every enterprise pursues. To increase production capacity, it is necessary to ensure the integrity of the equipment, the rationality of the process, the high labor efficiency, and the thoroughness of the plan. Strengthen operation management (cleaning, tours, stand arrangement, etc.) and equipment status maintenance, reduce empty spindles, broken ends for various reasons, unreasonable parking and doffing time, and improve equipment operation rate. The size of the spun yarn breakage rate has a direct impact on the product quality. The control of the spun yarn breakage involves all aspects of production, whether the operation management is sound, whether the operating technical level is excellent, and the work area to reduce the spun yarn breakage is wide and large. Work in all aspects is required to effectively reduce the yarn breakage rate, reduce the amount of air-absorbing cotton, and increase production capacity.
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