1 The connotation of spinning quality control
The survival and development of a company in the market depends on the quality of its products. If the quality of the spinning products of a spinning company is not up to standard, there will be no good sales volume and the company will not be able to maintain its operations. Therefore, at present, my country’s spinning enterprises must pay attention to both aspects. First, they must ensure the stable quality of spinning products. Second, they must strengthen the improvement of spinning quality. They must continuously improve on the basis of existing quality and constantly improve the quality of spinning products. The improvement of spinning quality is closely related to spinning technology and technology. It is also necessary to strengthen spinning production management, have a clear production management system, and refine production links. Spinning enterprises must pay attention to the introduction of new spinning equipment, strengthen innovation in spinning technology, develop two-way spinning technology and management, and always adhere to the principle of quality first.
2 Main contents of spinning quality control
2.1 Powerful
To strengthen strength control, the main raw material for spinning is cotton yarn. If the cotton yarn strength reaches 5%, it will reduce the working efficiency of the roving frame, which will seriously lead to an increase in production costs.
2.2 Hairiness
During spinning production, be sure to choose some short hairiness, or simply process long hairiness. If the hairiness is too long, the yarn will be easily tangled and broken, which will cause a high cost of spinning production. Increase will also affect the quality and aesthetics of spinning products.
2.3 Yarn defects
During spinning production, it is necessary to strengthen the inspection of yarn defects. If there are yarn defects in the spinning products, this will affect the inspection of product quality.
2.4 Neps
There are very few neps and impurities in the gray fabric, and there should be no “white stars” with poor color absorption after dyeing.
3. Spinning quality control concept
3.1 Drafting link
Reasonably coordinate the relationship between the various spinning production processes. In the spinning production process, the drafting link is very important. However, if you want to do a good job in drafting, you must strengthen the carding of the raw materials and effectively control the carding degree and carding intensity. The relationship between them must be able to balance the use of short velvet with each other, the relationship between the various production links of spinning must be reasonably coordinated, the factors that may affect the quality of spinning must be fully considered, and errors in the early processes must be avoided as much as possible, so that This will result in the inability to carry out follow-up work and directly result in the emergence of defective spinning products. For example, if the long and short velvet are not properly classified during the early processing of spinning, it may lead to the inability to carry out the spun yarn production process, and too many strands will affect the surface quality of the spun yarn, and many small bumps will appear, resulting in The emergence of spinning semi-finished products directly increases the cost of spinning production.
3.2 Five factors affecting spinning quality
3.2.1 Raw materials
Before spinning production, the spinning raw materials must be carefully screened, and the proportion of cotton and cotton blends must be coordinated so that the fibers can be fully mixed together to meet the needs of spinning production.
3.2.2 Process
In the spinning process, different spinning production processes will produce different spinning quality. It is necessary to strengthen the design of spinning production parameters, pay attention to the innovation of spinning production processes, and strengthen process testing. , to find the best spinning production technology and improve the quality of spinning production.
3.2.3 Equipment
If a spinning enterprise wants to produce spinning products, it must be inseparable from spinning equipment. Especially under the modern industrial situation, production enterprises must strengthen the introduction of spinning equipment, maintain and maintain various accessories, and perform regular maintenance. Check the spinning equipment and deal with problems in time if found.
3.2.4 Production management
To ensure the quality of spinning products, we must strengthen strict management of spinning production, ensure the cleanliness of the spinning workshop, improve the operating level of workers, and continuously improve spinning efficiency while ensuring quality.
3.2.5 Production temperature and humidity
The quality of spinning products is also closely related to the production temperature and humidity. During the production process, the production temperature and humidity must be controlled, which will directly affect the moisture regain of semi-finished products, bobbins and cones. Appropriate temperature and humidity can effectively improve the strength of spinning, reduce hairiness, and reduce the occurrence of yarn defects, so it is very critical in the spinning production process.
3.3 Reduce “cumulative error”
The spinning production process is very complex and involves many processes, so various errors may occur. If these errors are superimposed, they can have a great impact on the quality of the spinning products. Therefore, spinning enterprises must strengthen the reduction of “accumulated errors” and introduce advanced management technologies to avoid the emergence of spinning production errors.
4 Ways and measures to control spinning quality
4.1 Properly configure blowroom, carding and combing processes
The impact of reducing short lint content on the quality of spinning products. Since the shorter fibers cannot be effectively controlled in the drafting floating zone, it is easy to have large displacement deviations, so this will have an impact on the quality of spinning, especially It is the yarn deterioration that is more serious. Therefore, spinning enterprises must reasonably configure the blowroom, carding, and combing processes, andModerate blowing of blowroom cotton can reduce fiber damage; at the same time, we must adhere to the process route of “appropriate carding transfer and taking into account the formation of short staples” for carding. We must make reasonable choices for carding clothing and technology, and we must be able to Strictly control the short staple rate of combed sliver and optimize the spinning drafting technology in the production process to improve the quality of cotton yarn.
4.2 Preferred rubber rollers and rubber rings
If spinning companies want to improve spinning quality, they can also strengthen the optimization of rubber rollers and aprons. In the spinning production process, rubber rollers with high elasticity and low hardness are very suitable for heavy pressure and can effectively improve the spinning production results. Moreover, it is also necessary to strengthen the comprehensive consideration of holding force, drafting force, and control force, to simultaneously adjust the relationship between each force, and to effectively distribute and coordinate. At the same time, it is also necessary to ensure that the rubber rollers and aprons can run at a constant speed, try not to cause cracks, and make greater use of the high yield resistance of the aprons.
4.3 Improve evenness and reduce yarn defects
Cotton yarn evenness generally refers to the degree of weight unevenness of cotton yarn that meets the specified linear density requirements. Yarn defects include regular yarn defects and sporadic yarn defects. Among them, yarn defects with long details and long slugs are more harmful to the quality of fabrics, while yarn defects with short details and short slugs are more harmful to the quality of knitted jersey and high-density woven fabrics. Generally, quality improvement measures focus on the improvement of evenness CV value and frequent yarn defects, and there is no condition to inspect long details and long thick yarn defects. Such yarn defects should be paid close attention to during the production process and their occurrence is strictly prohibited.
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