Reduce J5.83 Varieties Minor Defects

Wuhuan (Group) Limited by Share Ltd developed pure cotton combed 100S varieties, with light texture, soft and smooth handle, good moisture absorption and comfortable clothing. It is a summer high-grade clothing material. Since its launch, the market has been selling well, and has achieved good economic benefits for the enterprises. However, customers reflect that there are more defects in the cloth and require solution. According to the index issued by the group, the QC group of the former spinning workshop and the rough quality tackling key group has actively organized a series of quality tackling problems.

Set goals: after investigation and analysis, the main factors that affect J5.83 varieties are mainly white. defect The Yellow defects and oil defects consist of only 85.62% of the white defects. As long as we try to reduce the occurrence of white defects of J5.83 varieties, we can reduce the small defects of this variety. Therefore, the QC group of the pre spinning workshop and the rough quality research group set the goal of the quality public relations. The goal is to control the J5.83 small roving defects by an average of 2306 / month in 1500 months.

Then feasibility Analysis: White Defects account for 85.62% of the total number of small defects, even if only 40% of them can be resolved, the defects will be reduced to 1516 months. At the same time, the group's previous experience in tackling similar technologies has provided valuable technological reference for this research. Therefore, the goal of 1500 within / month can be achieved.

Due to the analysis: the group focused on the problem of "J5.83 white spots", and analyzed the reasons. The various terminal factors that may cause defects are analyzed: the operator's sense of responsibility is not strong, the photoelectric self stop of the equipment fails, the channel burrs, the various parts are hung up, the quality of raw materials is poor, the process configuration is unreasonable, and the speed of the drawing is higher.

Aiming at the terminal factors that may cause defects, the team confirmed by various means such as investigation, analysis, experimental analysis, statistical analysis and so on, and finally confirmed that the operator's low responsibility, channel burrs, unreasonable combing, roving process configuration, and high speed were the main reasons for making J5.83 small defects.

The implementation of countermeasures: for the operator's sense of responsibility is not strong, the group proposed bold reform of the existing wage distribution plan, the production quality and the income of workers closely linked, fully embodies the principle of distribution of more labor and more gains. After the implementation of the new distribution system, the enthusiasm and quality of the work of the employees improved significantly. At the same time, the group also put forward measures to strengthen education and training, to carry out various forms of labor competition, to care for workers and to be people-oriented.

Aiming at channel burrs, the group members put forward equipment line arrangement to make rectification for channel burrs, strengthen routine cleaning and maintenance of passageways, and strengthen checks on various passageways. After the channel was clean, the yarn defects and white defects in one hundred thousand meters decreased by 20% and 16% respectively.

The group carried out process tests, optimized process parameters, and rationally arranged combing. Roving process 。 The orthogonal test was carried out to quantify the quantity of the cotton rolls, the number of combed strips, the rate of combed noil and the speed of cylinder, so as to improve the quality of the combed strips. In order to improve the roving quality and reduce the yarn breakage, through repeated tests, the team adjusts the roving tension and elongation, controls the roving elongation at about 1.2%, and adjusts the roving twist coefficient from 96.6 to 102, increasing the cohesion between the fibers, reducing the accidental elongation and the broken ends of the yarn, and reducing the number of artificial joint defects.

The high speed of the drawing is the main reason for the rising of the balloon type defects. For this reason, the group made a comparative test of the yarn quality at different speeds, and the 250m/min's speed was selected by considering the efficiency and quality comprehensively.