This contradiction can be solved from five major aspects: equipment, technology, operation, waste cotton treatment and yarn resurgence.
Device aspects
It is an important prerequisite to maintain the normal mechanical status of each process and correctly handle the contradiction between improving quality and saving cotton. Especially to deal with the contradiction between nep impurities and saving cotton, we must maintain the “five fast and one accurate” carding and needle grinding operation methods. This is an extremely important basic work and must be paid close attention to regularly.
In addition, strengthening the noil test and timely maintenance of the cleaning and carding machine based on the noil situation is also a regular measure to save cotton in terms of equipment.
Technical aspects
1) Improve the impurity removal efficiency of each cleaning and carding machine and the impurity content of waste Rate
The impurity content rate of cotton cleaning machines (except cotton box machinery) is required to be above 60%. If it is lower, the phenomenon of whitening will occur. Impurity removal of cotton cleaning machine The efficiency is required to reach 65%. The noil and impurity rate of the rear car of the carding machine is required to reach 40%. If it is lower, there will be whitening. The total impurity removal efficiency of the carding machine is required to be above 92%. If the requirements are not met, Measures must be taken to improve the process and machinery.
2) According to the performance of the raw cotton, the cleaning and carding should reasonably bear the waste.
If When the raw cotton has good maturity, thick linear density, few small defects and many coarse impurities, it is suitable for cleaning and carding. On the contrary, if the raw cotton has poor maturity, fine linear density, many fine impurities and few coarse impurities, it is suitable for cleaning. Therefore, it is not advisable to have too much cotton shedding in cleaning, and it is better to use more cotton shedding in carding.
3) Reduce the generation of short lint in the processes of cleaning, carding, striping and roughening
Linter is produced during the growth of cotton and poor ginning, but it will continue to be produced during each process of cotton spinning. The cleaning process produces about 1%, and the carding process produces about 1%. It is a normal phenomenon to produce 3%. If there is too much short lint due to poor mechanical condition and improper process design (it will even occur in the thickening process), it will cause excessive fly, increase slubs, and deteriorate the lint. , increased yarn breakage and other shortcomings, thus affecting the output, quality and cost of the product. Therefore, it is necessary to study how to reduce the increase rate of short lint as much as possible in each process of cotton spinning, mainly focusing on the following two aspects in terms of mechanical state: ① The blowing and carding components of each cleaning and combing machine must be sharp, smooth, and have correct spacing; ② Reduce the chance of rolling, deburring, and counterattack.
In terms of operation
Starting from cotton cleaning and unpacking, whether the operations of each process and type of work are carried out in accordance with the operating procedures not only affects the quality, but also the The cost has a great impact. For example, excessive backsplash is often caused by poor operation, which will increase labor, power and other costs. When blending chemical fiber and pure cotton, correctly grasping the prescribed blending ratio is often related to operation. . If blended products and pure cotton products are accidentally mixed, causing quality accidents, the problem will be more serious.
In terms of waste cotton treatment
Rational reuse of reused cotton: Replacing raw cotton with reused cotton is one of the important ways to reduce the cost of cotton. The so-called reasonable reuse of reused cotton first means that it must be processed, and secondly, the amount of reuse must be controlled to avoid affecting the quality. Generally, impurities, harmful defects, neps, short lint, etc. in reused cotton are properly removed before reuse. Some can be reused with the original expenditure, and most can be reused with reduced expenditure. This includes needlework, combed waste, and netted waste that can be reused in low-thickness yarns, top-quality broken seeds, etc. When arranging the plan, a small number of machines can be used to spin coarse yarn or secondary brand yarn, so that the reused cotton produced by the enterprise can be reused in the enterprise itself as much as possible, which will help reduce the overall cotton consumption and cotton consumption of the entire enterprise. There are benefits to both costs.
Control moisture regain of finished yarn
Strictly manage the temperature in the finished room Humidity is controlled within the specified range. The time and frequency of moisture regain measurements should be determined according to the packaging time and frequency, especially when the atmospheric humidity is high. Electrical moisture return measuring instruments and scales must be calibrated frequently, and a dedicated person must be responsible for weighing. The determination and correction of the fixed length of the rocking yarn frame are also very important and cannot be ignored, otherwise losses will easily occur.
At present, many companies are actively exploring employee performance appraisal systems, which will not increase salary costs, but also maximize the enthusiasm of employees, save consumption and improve efficiency through technological transformation. Efficiency, improving output quality through operational training, improving labor productivity through organizational streamlining to relatively increase personal income and other means to achieve the goal. For example, some enterprises implement a total wage contracting system, based on the equivalent output, combined with the amount of cotton used, product quality, customer complaints, production safety, civilized production inspection, equipment inspection, various consumption (including machine material costs, water, electricity and gas costs, Production management expenses, packaging material expenses, etc.) shall be comprehensively assessed. </p
