There are many textile mill equipment modification plans on the market, some are successful and some have mediocre results. Here are three more effective ways to modify spinning machines, and I hope you will comment on them.
01 Design a new drive system to improve the degree of automation
The A513 spinning machine uses a single motor , through open gear transmission, the maintenance workload is large, the sealing is not good, and oil pollution is easy to form; the lifting and forming cam of the ring plate is easy to wear, generates impact force, and the process adjustment is inconvenient, and it can no longer meet the current needs of spinning. Based on the analysis of advanced spinning frame transmission systems at home and abroad, and combined with existing multi-axis drive technology, technicians from a company proposed a set of spinning frame drive system transformation plans with their own characteristics and advantages.
The transformation plan cancels the open gear transmission method. The roller uses an asynchronous motor with an encoder to accurately control the roller speed in a closed loop. At the same time, the speed of the spindle is sampled in real time, and the PLC controls the front roller through the frequency converter. The roller motor changes as the spindle speed changes. The control system also uses DC bus technology, that is, in the event of a sudden power outage, the large-capacity main inverter supplies power to the front, middle and rear roller inverters, so that the front, middle and rear rollers follow the inertia of the main motor and stop synchronously to avoid Extensive beheading.
Based on preliminary research, Fengwei PLC, Delta PWS6800C HMI, TECO servo motor, and TOYO inverter were used for transformation. First, the drafting gear of the spinning frame and the lifting cam of the ring plate were removed, and the motor was installed on the newly designed steel wall panel for modification practice. Then the process parameters are input to realize the multi-axis CNC transmission of the traditional spinning machine. After the test operation, the transformed traditional spinning frame has improved automation and flexibility, is easy for operators to operate, and has a low failure rate during the equipment test process.
02 Transformed to have compact hollow rollers and better spinning quality
The hollow roller compact spinning transformation process is as follows: replace the 25 mm diameter front roller with a 50 mm diameter hollow roller. In order to keep the surface linear speed of the modified hollow roller consistent with that of the modified front roller, the angular speed of the front roller needs to be reduced by half, so the pair of transmission gears 50T and 32T on the front roller head of the FA1516 spinning machine are changed to 36T and 46T. After the front roller of the spinning machine is replaced with a hollow roller with a diameter of 50 mm, the height of the T-shaped lower pin needs to be changed from the original 14 mm to 12 mm. This can effectively improve the friction between the lower apron and the hollow roller. In addition, it is also necessary to change the angle between the front roller seat of the spinning machine and the horizontal plane from 45° to 30°, and adjust the position of the middle and rear rollers to ensure that the spinning planes of the three rollers are in the same plane. At the same time, adjust the Suesen leaf spring cradle Mounting angle.
We used the modified hollow roller compact spinning device to successfully spin CJ 11.7 tex compact yarn on the FA1516 ring spinning machine, and combined it with traditional ring spinning and Suesen grid compact yarn A comparative test of yarn quality was carried out. Practice has shown that the yarn quality after the transformation is significantly higher than that of traditional ring-spun yarn; compared with Suesen mesh ring compact spinning, the yarn evenness and yarn defect quality are slightly better, the strong elongation performance is equivalent, and the 3 mm harmful hairiness is slightly lower. Poor, but more hairiness of 1 mm to 2 mm is retained, which is beneficial to improving the cloth style.
03 Expand the upper opening of the suction tube to reduce clogging of the holes in the suction tube
The company’s ring spindle The holes of the suction tube of the spinning testing machine are very easy to get clogged. Technical personnel analyzed that the fibers sucked by the holes at both ends of the cotton suction tube have a long journey in the tube lumen, and are easily retained in the tube lumen and difficult to be discharged due to burrs, rust, or resistance between fibers; in addition, this form of tube lumen suction The wind is uneven and the holes at both ends have weak suction and are easily blocked.
Based on the above analysis, an improved cotton suction tube was designed, which mainly expanded the upper mouth of the cotton suction tube to 280 mm, the length to 60 mm, and the diameter of the lower port remained unchanged. The two ends of the upper mouth of the suction tube are located exactly between holes 2 and 3, and holes 6 and 7, which are the places where fibers tend to accumulate. The accumulated fibers directly enter the mouth of the suction tube and are easily discharged. The upper ends of the original cotton suction nozzle are located at holes 4 and 5. The corners at approximately right angles to the mouth of the cotton suction nozzle are prone to accumulation of fibers. After the improvement, this problem no longer exists; the shortest horizontal distance from the holes at both ends 1 and 8 to the cotton suction mouth is Reduced, more than half than the original; and the new cotton suction tube mouth cavity volume increased, allowing the accumulation of fiber capacity is large, filling time is long, in addition, the suction in the entire joint cavity is much more uniform than the original, thus reducing clogged. During actual installation, the connecting pipe needs to be shortened accordingly. Experimental observations on the improved cotton suction tube showed that the average number of blockages per hour was less than that of the original cotton suction tube. </p
