Foreign fibers refer to non-cotton fibers and colored fibers mixed into cotton that have a serious impact on the quality of cotton and its products, such as chemical fibers, hair, silk, hemp, plastic films, plastic ropes, dyed threads (ropes, cloth block) etc. Foreign fibers have the characteristics of small content, great harm and uncertainty. Not only are they difficult to remove during the textile process, but they will also be broken or combed into shorter, thinner and more fibrous defects during the cleaning and carding process, which will reduce the quality of cotton products and lead to uneven dyeing of the cloth. Affect the appearance.
The problem of foreign fiber removal has always troubled textile enterprises. Due to the shortage of labor resources and the increase in wage costs As prices rise, manual picking of foreign fibers is gradually replaced by intelligent instruments or equipment. At present, enterprises generally carry out strict control in three stages: raw cotton control, foreign fiber sorting machine processing in the blowroom process and yarn clearing in the winding process, striving to maximize the Eliminate the influence of foreign fibers.
1. Strictly control the source of raw cotton
To solve the problem of foreign fibers, we must first control the raw cotton , the total amount of foreign fibers in raw cotton directly affects the removal rate during the production process and the amount of foreign fibers in the yarn. You should look for raw cotton suppliers with good foreign fiber control and high quality reputation to ensure the quality of raw cotton. Secondly, after the raw cotton enters the factory, while conducting routine physical indicators inspection on the raw cotton, the foreign fiber content in the raw cotton should also be randomly inspected. According to the classification of foreign fibers in raw cotton from each origin and the company’s internal foreign fiber control standards for raw cotton, the foreign fiber content in the raw cotton should be randomly inspected. The purchased raw cotton is classified according to its foreign fiber content for easy matching.
2. Foreign fiber machine removes foreign fibers
At present, there are two main detection methods for foreign fiber detection in the cotton cleaning process at home and abroad: photoelectric detection and ultrasonic detection. The photoelectric type is divided into two types: phototube type and CCD. The main features are As follows:
In actual applications, due to many factors such as cotton blocking, wrapping and noise, although a foreign fiber machine is used, there are still foreign fibers If missed, the detection rate is not high. Therefore, the company began to implement “one line, two machines”, that is, two foreign fiber machines of different models are used in series to solve the foreign fiber blocking problem through secondary opening and secondary detection, and further improve the foreign fiber removal effect. After the cotton passes through the foreign fiber machine for the first time, most of the three yarns are removed, but there are still some three yarns that hide in blind corners, are wrapped and blocked by cotton and cannot be removed. The cotton flow passes through the foreign fiber machine for the second time and is fully mixed in the cotton box. Finally, open it again to ensure that the three parts hidden in the blind corners are evenly spread out and remove the leaking mesh
3. Self-networking The last step is to clear yarn and foreign fibers
The automatic winding machine is equipped with an electronic yarn clearer with the function of detecting colored foreign fibers. When foreign fibers are found, the yarn is cut off. Can effectively remove foreign fibers. It is based on the original photoelectric electronic yarn clearer and adds a photoelectric foreign fiber detection device. This photoelectric is specially used to detect colored heterosexual fibers. It can not only remove colored fibers and foreign fibers, but also colorless foreign fibers, which can effectively solve the problem of foreign fibers in bleached yarn.
The methods and effectiveness of spinning mills to control foreign fiber are limited. The fundamental way to solve the problem of foreign fiber is to strengthen management during the planting, picking and processing stages of cotton to avoid foreign fiber. It is hoped that the problem of foreign fibers mixed in during the picking and processing of domestic cotton can be solved as soon as possible and the overall quality of domestic cotton can be improved. </p
