This contradiction can be solved from five major aspects: equipment, technology, operation, waste cotton treatment and yarn resurgence.
In terms of equipment
Maintain various The normal mechanical state of the process is an important prerequisite for correctly handling 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.
Technological aspects
1) Improve the impurity removal efficiency of each cleaning and carding machine and the impurity content rate of waste
The impurity content rate of cotton cleaning machines (except cotton box machinery) is required to be above 60%. If it is lower, there will be white dropout. The impurity removal efficiency of the cotton cleaning machine is required to reach 65% The noil impurity rate in the back belly of the carding machine is required to reach 40%, and if it is lower, there will be whitening. The total impurity removal efficiency of the carding machine is required to reach more than 92%. If the requirements are not met, the process and machinery must be improved. Take measures to improve.
2) According to the performance of raw cotton, make the cleaning and carding reasonably bear the cost of waste
If the maturity of the raw cotton is good, the linear density is thick, there are few small defects and many coarse impurities, it is suitable for cleaning and carding. On the contrary, if the maturity of the raw cotton is poor, the linear density is fine, there are many fine impurities and few coarse impurities. , then the cleaning cotton should not drop too much, and it should be carded to drop more cotton.
3) Reduce the number of steps in cleaning, carding, striping, and roughening. The production of lint
Linter is produced during the growth process of cotton and during the poor ginning process, but it will continue to be produced during each process of cotton spinning, including the cotton cleaning process. Approximately 1% is produced during the carding process and approximately 3% is produced during the carding process. This is a normal phenomenon. If too much short lint is produced due to poor mechanical conditions and improper process design (even in the strip thickening process), it will cause excessive fly lint. , increased slubs, deterioration of evenness, and increased yarn breakage, etc., 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 in the mechanical state In terms of aspects, we must seize the following two links: ① The blowing and carding components of each cleaning and carding machine must be sharp, smooth, and have correct spacing; ② Reduce the chance of rolling, return, 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 And it has a great impact on cost. For example, too much wasteback is often caused by poor operation, which will lead to an increase in labor, power and other costs. When blending chemical fiber with pure cotton, correctly grasping the specified blending ratio often also affects the cost. Operation related. If blended products and pure cotton products are accidentally mixed, causing quality accidents, the problem will be more serious.
Waste cotton processing
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.
In terms of moisture regain control of finished yarn
Strictly manage the temperature and humidity in the finished rooms to keep them within 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, etc. 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
