Abstract: Control the basic management of yarn hairiness: wire ring weight, negative pressure detection management, equipment status management, temperature and humidity management, operation management, etc.
Abstract:Control of yarn Mao Yu,We must strengthen the basic management such as:Choose a good lap steel weight, Negative pressure detection and management, Equipment condition management, Temperature and humidity control, Operation management etc.
Key word: Control ,MaoYuyarn Management
Keywords: control yarn hairiness management
With the continuous improvement of compact spinning equipment and the maturity of technology, it will play an increasingly important role in the production of high-grade fine-grain high-density fabrics and occupy more market share. It has been proved that compact spinning can greatly reduce the yarn hairiness, improve the stem and improve the strength, and has obvious technical and quality advantages compared with ordinary ring spinning, especially 3mm hairiness compared with ring spinning. The reduction is 50-60% or more. However, if the management is not in place, the yarn quality will be seriously degraded, and the hairiness index will be worse than the ring spinning. For compact spinning, to achieve the desired results, we must pay great attention to the basic management of spinning. Therefore, to control the yarn hairiness, we should focus on strengthening the following management tasks:
1. Choose the weight of the wire ring: choose the wire ring with moderate weight and moderate hardness. The cross-sectional shape should be as small as possible to reduce the friction coefficient, but the contact area with the steel ring should be large to facilitate heat dissipation and increase stability. The wire ring is too light, and the air ring collides with the yarn separating plate; the wire ring is too heavy, so that the top of the ring is easy to rub the top of the tube. Therefore, adjust the spindle speed or change the variety. When changing the wire ring, pay attention to the field observation selection.
2. Negative pressure detection management: From the working principle of the compact spinning device, we know that there is enough negative pressure to make the slivers in the collecting trough regularly arranged to achieve the effect of agglomerating fibers. Therefore, in management, first determine the negative pressure value according to the variety, and then have a special person to regularly check the negative pressure value of the front, middle and rear of the car, and keep it relatively stable, pay attention to the cleanness of the negative pressure box and the position of the tension bar holder.
3, equipment state management: the good condition of each component is the key to spinning good yarn, especially the state of the spinning equipment: to do three pairs (steel collar and dragon tendon, spindle and tube, spindle tip and guide hook) Three matching (ingot and spindle, spindle and bobbin, steel collar and wire ring); check the clearance of yarn clearing, prevent the flower ring from hanging flowers, the spacer film winding phenomenon; regularly check whether the guide yarn is too deep; Whether the platform board is stable or not, whether there is noisy or dithering phenomenon; when sweeping the vehicle, whether the upper apron, the lower apron, and the accumulated flower in the grid circle are completely cleaned, etc., to avoid long-term sticky operation of the equipment.
4. Temperature and humidity management: In view of the characteristics of compact spinning, the process exhaust temperature of the compact spinning frame workshop is 2°C-3°C higher than that of the traditional ring spinning workshop, and the exhaust of the spinning machine tail can generally reach 6m3/h per spindle. 8m3/h. In order to ensure the quality of compact spinning products, the workshop temperature should be between 26 °C and 31 °C, and the relative humidity is 52-58%. The relative humidity should be slightly lower than that of the traditional ring spinning. The relative temperature is high and it is not easy to remove the short velvet. Relative humidity, when the fiber bundle passes through the tightly spun grid, the linters will be effectively absorbed in time to reduce hairiness.
5. Operation management: According to the actual production situation, formulate maintenance and cleaning plan, implement the machine responsibility system, strengthen staff training, and formulate a set of practical operation methods and cleaning methods. Cleaning should be in place, there should be no accumulation of flowers in the drafting area; when the trainer is on tour, the shape of the sliver at the gathering trough should be observed regularly. When the gauze is beaten, beaten and diverged, the ingot inspection and repair should be stopped; After the tube, check whether the height of the tube is flush, so as to avoid the head of the air tube, there must be no jump tube during operation, and whether there is accumulation blockage or hanging flower in the collection tank.
As long as we do the above management work, we can stabilize the yarn hairiness. Of course, other factors that affect the hairiness of the yarn are, for example, the quality of the yarn before spinning, the roll of the spun yarn, the amount of advancement of the top roller, the swing of the spindle, the burr of the bobbin, and the like.
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