To reduce the difference in evenness and weight between spinning spindles, the focus should be on unwinding, drafting mechanisms and related components.
#01
Roving spindle: flexible and accurate requirements For accurate spinning spindle position, pay attention to the positioning of the hanging spindle next to the roving frame column. Do not cause the roving bar to be scratched by the friction of the yarn guide rod arm. The position of the yarn guide rod must be adapted to the unwinding of the roving crane spindle. (The operation operation must ensure that two adjacent roving strips do not cross-feed).
#02
Bell mouth: required to be firmly fixed on the flat iron, depending on the spinning The yarn method determines the corresponding range of movement and adjusts it appropriately so that it is basically located in the middle of the rubber roller when traversing (if there is no yarn guide movement, it should also be basically located in the middle of the rubber roller); the interior should be smooth, without burrs, and without damage. , no dirt, no grease, no accumulation of flowers, etc.
#03
Cradle: The cradle seat should be fixed on the cradle support and cannot be loose, and it is required to work properly. Use a digital pressure gauge to calibrate the front, middle, and rear pressures one by one, and control them according to the standard pressure ±5 N; the “three open gears” must be consistent, and the rubber roller, iron shell, and upper pin on the bracket must be parallel to the roller (unqualified The claws and circlips of the cradle must be replaced in time), and the position of pressurization must 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.
#04
Lola, Laura Bearings: The rollers must be supported firmly, work normally, have a radial runout of less than 0.03 mm, and rotate briskly and flexibly; the surface of the rollers 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 absolute 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.
#05
Roller distance : It must be calibrated with a roller 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 looseness and tightness should be within 0 to 0.03 mm. 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 mm or 17.5 mm.
#06
Cots roller, The positioning of the upper iron shell and the upper pin: the forward impulse of the front rubber roller relative to the center of the front roller, the centering of the upper iron shell and the rear rubber roller, the center of the rear roller must be accurate and consistent, and the front edge of the upper pin and the front edge of the lower pin must be The principle of flushness. In the pressurized state, visually check the distance between the apron jaw and the surface of the front rubber roller (commonly known as the one-line-to-day gap), so that the difference cannot be seen (when changing varieties and adjusting the distance block, check the one-to-one gap This is also required).
#07
Pin the middle Leaf spring (if it is a carbon fiber upper pin, this is not required): If it is found that the pressure difference is large or the installation is not in place, it should be replaced or adjusted in time. Generally, it should be replaced once every 2 to 3 years.
#08
Up, down Pins (if it is a carbon fiber upper pin, there is no need to reshape the upper pin): The upper and lower pins need to be fully calibrated, reshaped and repaired every 4 to 6 months, using special tools and in accordance with quality standards. Do not use the lower pin as a crowbar while working (common bad behavior).
#09
Spacer block . Rubber ring jaws: It is appropriate to use arc-shaped single-sided spacer blocks and divide them into 0.25mm steps. The spacer blocks on the same type of machine should not only have the same specifications and colors, but also the left and right feet of each spacer block. It is necessary to press down firmly 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.
#010
Lower the rubber ring Tension hook: Check the tension hook of the rubber ring every time you wipe the car. It should be flexible and well-tensioned, and eliminate unqualified phenomena such as being too tight or too loose.
#011
Apron: The model, manufacturer, new and old, and combination of new and old rubber rings must be consistent for each vehicle of each type. A reasonable replacement and scrapping cycle must be developed. The cleaning cycle of the apron 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.
#012
Cots: It must be carefully made and ground back regularly to minimize the differences in the rubber roller itself. It 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
