Most spinning equipment is in direct contact with yarn and is the most critical component of spinning. The reasonable selection of spinning equipment plays an important role in the quality of yarn products. Therefore, in order to reduce the problems of inter-spindle differences such as evenness differences and weight differences between spinning spindles, the focus should be on winding, drafting mechanisms and related equipment.
1. Roving spindle: It is required to be flexible, align the spinning spindle position, pay attention to the positioning of the hanging spindle next to the roving creel column, and do not cause the roving strip to be rubbed by the arm of the yarn guide rod. In case of scratches, the position of the yarn guide rod should be adapted to the unwinding of the roving spindle. The operation operation should ensure that two adjacent roving strips do not cross-feed.
2. Bell mouth: It is required to be firmly fixed on the flat iron. The corresponding range of motion is determined according to different spinning methods and adjusted appropriately so that it is basically located at the glue when traversing. The middle part of the roller should be smooth and clean without burrs, damage, dirt, grease, accumulation, etc.
3. Cradle: The cradle base should be fixed on the cradle support and cannot be loose. It is required to work normally. Use a digital pressure gauge to calibrate the front, middle and rear pressures one by one. The rubber roller, iron shell and upper pin on the bracket should be parallel to the roller. Unqualified cradle claws and circlips should be replaced in time, and the position of pressurization should be correct. For spring cradle, attention should be paid to ensuring the elasticity of the spring to prevent failure. If it is unqualified, it should be replaced in time and cannot be used beyond the service period; for pneumatic cradle, attention should be paid to ensuring the stability and balance of air pressure.
4. Roller: The roller is required to be firmly supported, work normally, have a diameter jump of <0.03mm, and rotate briskly and flexibly; the surface of the roller must be intact, undamaged and clean. When wiping the car, use a copper brush to clean the grooves, and then wipe it with a soft cloth dipped in anhydrous alcohol or gasoline to completely remove cotton wax and small impurities adhered to the surface. The roller bearings must be intact and run flexibly, and oil must be refueled on time. The uniformity of the roller bearings and roller neck rotation must be checked every day, and any unqualified items must be removed promptly.
5. Roller spacing: It must be calibrated with a roller spacing gauge to ensure accuracy and basically no difference. After the front roller is leveled, the distance between the front, middle and front and rear rollers must be carefully adjusted. The tightness should be limited to 0~0.03mm. The adjustable roller spacing gauge must be calibrated with a vernier caliper before each use. If conditions permit, the front and middle roller spacing gauges can be customized to a fixed value such as 18 or 17.5mm.
6. Positioning of the rubber roller, upper iron shell and upper pin: the front rubber roller has forward momentum relative to the center of the front roller, the upper iron shell and the rear rubber roller are centered respectively, and the rear roller The center must be accurate and consistent, and the upper and lower pin fronts must be flush. In the pressurized state, it is best to visually inspect the distance between the apron jaw and the surface of the front rubber roller so that no difference can be seen. This is also required when changing varieties and adjusting the spacer block.
7. Spacer blocks and rubber ring jaws: Arc-shaped single-sided spacer blocks should be used and divided into 0.25mm steps. Spacer blocks on the same type of machine should be used. Not only the specifications and colors must be consistent, but the left and right feet of each spacer block must be firmly pressed down on the surface of the front surface of the lower pin at the same time, so that the 0.05mm feeler gauge cannot be inserted. The jaws of the rubber ring should be flush, that is, the upper pin should be flush with the front edge of the lower pin.
8. Tension hook of the lower apron: Check the tension hook of the lower apron every time you wipe the car. It should be flexible and can be tensioned well to eliminate tension. Too tight, too loose and other unqualified phenomena.
9. Apron: The model, manufacturer, new and old, and combination of old and new of the apron must be consistent for each vehicle of each type. A reasonable replacement and scrapping cycle must be developed. The apron cleaning cycle should be determined according to the type of spinning. After picking up the apron for cleaning, it should be washed and dried with a special detergent. When replacing the rubber ring in cold weather, the rubber ring must be preheated before getting on the car and make it reach the same or similar temperature as the workshop before getting on the car.
10. Rubber rollers: They must be carefully made and ground back regularly to minimize the differences in the rubber rollers themselves. They must be cleaned and used correctly. It is required that the diameter, service life, manufacturer, model, surface treatment, etc. of the front and rear rubber rollers of the same type must be consistent; in order to ensure the perfect operation of the front rubber roller on the machine, a dedicated or part-time person must be responsible for touching the rubber on the machine every day roller, timely detection and removal of defective front rubber rollers. When wiping the car and replacing the rubber rollers in cold weather, the rubber rollers must be preheated before getting on the car, so that they reach the same or similar temperature as the workshop before getting on the car. </p
