The production site is a place for product development and production. The production of colored yarn, like the production of natural yarn, is a continuous large-scale production with multiple processes, multiple machines, multiple varieties and many workers working in three shifts day and night. However, There are two important differences between the production of colored yarn and the production of natural yarn:
First, the concept of color Integrate into the whole production process, such as poor management, and prone to defects such as color difference;
Second, its production characteristics are small batches, multiple varieties, and frequent replacement of varieties. In a There are often dozens of varieties produced at the same time in the workshop. Improper management will cause the production site to be in a state of chaos and disorder. The occurrence of defective products such as mixed counts and batches will seriously affect production efficiency or cause problems due to the occurrence of defective products. Therefore, strengthening production site management and creating a good production environment are important guarantees for color spinning production.
According to the many years of production practice of Zhejiang Province and domestic colored spinning manufacturers, we must focus on three aspects: regional management by variety, “5S” management at the production site and temperature and humidity management. The important links are now described in detail as follows:
1. Strengthen the regional management of colored spinning yarn by variety
1.1 Regional management by variety necessity.
The difference between color spinning and traditional natural color yarn production has been discussed many times before: it introduces the concept of color, which uses two or more fibers of different colors that are fully mixed After spinning, fibers of different colors are combined in different proportions, and yarns of different colors will appear; if the mixed proportions of colored fibers are different, different colors will appear on the yarn. In a production workshop or a work area, yarns with different mixed color ratios will be produced at the same time, so the various signs in the workshop must be clear and cannot be confused. If the slivers of different colors are placed incorrectly due to unclear markings, it will cause color difference accidents that are taboo in color spinning. Therefore, it is very necessary to carry out strict zoning management of different varieties in the production of color spinning.
In addition, analysis from the perspective of “flying flowers”: In the same workshop, each spinning machine produces yarn of different colors. If flying flowers of various colors are mixed together, then Products will have defects due to the attachment of flying flowers. In particular, some light-colored and brightly colored varieties are particularly sensitive to heterochromatic flying flowers (flying fibers). This requires workshop management to not only conduct regional management of the varieties produced, but also Before and after each production process, cleaning work must be done thoroughly and measures to prevent flying dust must be taken.
Again, from the perspective of color light (fluorescence) of color spinning, the color light and the light emitted by the light source after a series of absorption and reflection by the object (the remaining light) have a negative impact on people. A stimulating effect on the eyes, which is what we usually call the “color light effect of this variety”. If one variety is mixed with fiber of another variety, the color of that variety will give people a different feeling, which is the so-called “shade difference.” Especially varieties such as light green, yellow, light blue, light red, etc. are particularly obvious, which increases the difficulty of color matching for color matching personnel. Therefore, in workshop management, it is not only necessary to do a good job in regional management of different varieties, but also to follow the “principle of producing the same color system in one area as much as possible” in the process of zoning to improve customer satisfaction with color and light. “Fluorescence” means that the raw materials used can appear bright and milky white light under the irradiation of ultraviolet rays. Colored yarn production uses fluorescent fiber spinning to make fabrics, which can make the cloth achieve a brightness that cannot be achieved by natural cotton. However, using fluorescent fiber spinning and weaving to wear has certain harm to the human body, especially to infants and children. Some foreign users require a ban on fluorescent fiber spinning. Therefore, in actual production, measures must be taken to isolate fluorescent fiber spinning from non-fluorescent fibers to prevent confusion.
1.2 Several tasks to be done in regional management of different varieties
Through the above-mentioned color spinning From the analysis of the importance and necessity of regional management of yarn varieties, it can be realized that there is a big difference in the variety management of colored yarn and natural yarn production, and its management difficulty is much more difficult than that of natural yarn production. After many years of production In practice, three tasks should be focused on in regional management of different varieties.
① Parking spaces for production varieties must be reasonably arranged
Various regional management is only a relative sub-region, not absolute. How to manage production varieties by area is inseparable from the reasonable arrangement of parking spaces for the varieties produced. We must follow the “principle of producing the same color system in one area as much as possible”, that is, when arranging parking spaces, such as green varieties Try to use the same machines for production, and try to use the same machines for red varieties. All processes from front spinning to back spinning should be consistent. When a color variety is completed, it is best for the variety produced after the batch to be closer to the color of the previous batch. In this way, it is more advantageous to change varieties for cleaning without having to do it very thoroughly. If the color difference between the two batches of production is too large, the cleaning work must be done thoroughly when changing batches, otherwise the color and quality of the varieties produced after the batch will be affected to a certain extent. Therefore, rationally arranging parking spaces according to different colors is the first management task to be done in sub-regional management.
② It is necessary to strengthen the prevention and control measures against flying flowers and foreign fibers.
“Flying flowers” are a long-standing problem that affects the quality of colored spinning and the color and light of yarns. According to reports from many colored spinning companies, currently customers account for 10% of all complaints due to “flying fibers and foreign fibers” affecting yarn quality.��, in summer, the purpose is to cool down and dehumidify. Since the outdoor heat and moisture content in summer is greater than that of the workshop, it is advisable to use a mixed air with return air as the main component and a small amount of outdoor air as the supplement, and use low-temperature water spray to make the hot and humid air Part of the water vapor condenses and precipitates under the washing of low-temperature water; at the same time, heat exchange is performed, which can lower the dew point temperature of the machine and achieve the purpose of cooling and dehumidification. In winter, the situation is opposite. The purpose is to raise temperature and humidify. Since the outdoor temperature is low and humid in winter, it is necessary to increase the dew point temperature of the machine. A large amount of workshop return air or even steam supply should be used to achieve this purpose. In specific adjustments, a frequency converter can be used to adjust the air supply volume or change the air supply parameter adjustment method according to outdoor air conditions.
⑤ In order to continuously explore and master the temperature and humidity adjustment work in the workshop, air-conditioning personnel are required to be proactive in the adjustment work (actively observe outdoor climate changes, watch weather broadcasts in a timely manner, and actively strengthen patrols and experience The production situation in the workshop) The second is diligence (visiting the workshop and operation shift workers frequently to solicit opinions, frequently adjusting relevant air-conditioning equipment, and giving full play to the due role of various air-conditioning equipment) The second check (turning on and off the cold engine well, preheating and air volume adjustment) ;Turn off power outages and take appropriate adjustment measures).
⑥ Air-conditioning personnel should also establish energy-saving ideas when performing adjustment work. Under the condition of ensuring the temperature and humidity of the workshop, scientifically use adjustment technology to strive to save electricity, gas, and water.
4. Conclusion
The production of colored yarn is the same as natural yarn, requiring multiple processes, multiple machines, and multiple varieties. Many employees work continuously in three shifts day and night, but there are two important differences between it and natural yarn production: first, it integrates the concept of color into the entire production process, which increases the difficulty of production; second, colored spinning produces more varieties than natural yarn. There are many, small batches and frequent variety changes, so its management is much more difficult than natural yarn production. Improper management can easily produce defective products. Therefore, how to manage the on-site management of colored yarn production is a common concern for enterprises. According to many years of production practice in Zhejiang and domestic related enterprises, as long as we do a good job in regional management by variety, we can effectively manage the production site at the production site. Only by implementing the “5S” advanced management method and doing a good job in temperature and humidity management at the production site to create a good production environment and stabilize the production order can we achieve high quality and efficiency. </p
