Why spinning machine reforms

In the spinning machine with two-speed control, spindles are running at constant speed during fast and slow speeds, and there is also a sudden acceleration of slow-speed rotation. The spinning tension fluctuation range of spinning yarns at different stages is relatively large. When the momentary peak of the spinning tension is higher than the minimum strength of the corresponding yarn segment, it will cause a break. The distribution of breaks in a doff is the most in small yarns, followed by big yarns and least in yarns. Therefore, reasonable control of the peak value of the balloon tension in a doffing and its fluctuation range is of great significance for reducing the number of yarn breakages.

The frequency conversion transformation of a spinning machine is a different spinning stage in a doffing machine. The running speed of the spindle is changed by the change in the preset frequency of the main drive motor to balance the changes in the spinning tension in different spinning stages. The spinning tension in the doffing is as stable as possible within a small range, thus reducing the breakage of the spun yarn.

(Figure 1: Renovation of Jihua 3542 old spinning frame)

At present, many enterprises in China, FA503, FA507, some FA506, 128K and even FA502, 512, 513 and other models of constant-speed spinning frame is still in use, will not be eliminated in a short time.

Then, the addition of spinning frequency converters with a spinning curve function to these spinning machines is the most effective and economical way to increase the spinning efficiency of older spinning machines and reduce the cost of ton yarns.

Spinning machine special inverter transformation effect

Wuhan Jiangnan Electronic Technology Development Co., Ltd. developed a special inverter for the spinning frame, which can transform the old-fashioned spinning frame without frequency converters, so that it has the function of the new spinning frame and improves the running quality. According to the distribution law of a doffing breakage, the spinning frequency inverter developed by Wuhan Jiangnan Electronics adopts a stepless speed regulation program, which can freely set the spinning length corresponding to 16 lengths and lengths throughout the spinning process. The yarn and yarn stage reduce the speed and reduce the breakage; the yarn increases the speed and increases the output (up to 5-10% depending on the specific process conditions), and the frequency converter automatically adjusts the entire spinning yarn according to the set sixteen-stage spinning curve. The output speed of the main motor during the process, the spindle speed at the small and large yarn stages is reduced by 5-8%, and the middle yarn stage is increased by 5-15% according to the condition of the spindle speed. The replacement of the production type after the transformation does not require the replacement of the belt pulley, which improves the efficiency of the process changeover and the efficiency of the equipment; it has the functions of statistical class production and total output, and can display the front roller speed, rear roller speed, spindle speed, spindle speed, drafting in real time. Than other process parameters.

The breakage rate is significantly reduced, and the shifters have more time and energy to clean the machine table and the drafting area. This can effectively reduce sporadic yarn defects caused by flying flowers, and at the same time reduce the number of joints. Joints are defective. In addition, the use of variable frequency speed regulation also reduces problems such as balloon expansion and hitting the stencil, making the hairiness uniformity of large, medium, and small yarns better, and reducing the adverse effects of very poor hairiness on the fabric quality. After the decapitation is reduced, the number of joints, flowers, and bellows are all reduced correspondingly, thereby increasing the production rate of the spinning process.

For some spinning machines originally equipped with frequency converters, after several years of operation of the spinning frame, the function of the frequency converter has been reduced and the failures have increased, which has caused great difficulties for production. Jiangnan Electronic's replacement frequency converter for this problem can directly replace most mainstream spinning frame inverters (such as Lenz, Kobe, Hitachi J300, YEP, Delta CT2000, Delta B, etc.). , The installation dimensions are the same, the electrical performance is the same, the replacement is simple and fast, and the problem of repeated failures and affecting the production after a long service life of the inverter is completely solved once. The special inverter for spinning frame replacement can directly replace the original inverter. The original function of the spinning frame is not affected.

(Figure II: Yunxia Textile Spinning Machine Replaces Kobe Converter)

The unique design of Jiangnan electronic spinning special frequency converter

As an electronic product, a series of electronic components are used. It is well known that there is a half-life problem for electronic components and they are prone to ageing and recession. For example, resistances, voltage regulators, optocouplers, and insulating materials on frequency inverters are relatively easy to age. So, can the lifespan of Taichuan Suzuki's special frequency converter produced by Jiangnan Electronics be comparable to that of imported brands? From the principle of view, the service life of the special inverter for Taichuan Spun Yarn produced by Jiangnan Electronics should be guaranteed. This judgment is mainly based on two points: one is the use of an amplification-level inverter module, and the other is the use of a fanless large heat sink. Design, cancel the heat fan.

For the effect of using the amplifier module of the amplification level, it can effectively solve the fault caused by the overload, so that the failure rate is significantly reduced.

The design of the fanless large heat sink is used because the cleanliness of the air in the production halls of the textile enterprises is not high, and there are many flying dust and dust. When the fan is used for heat dissipation, the dust in the air is easily inhaled by the fan and accumulates in the inverter. On the electronic components, thus affecting heat dissipation. When the temperature exceeds the allowable operating point, it will cause a trip, and in severe cases it will shorten the service life of the inverter. The fanless large heat sink design can effectively reduce dust pollution on electronic components. In particular, when Jiangnan Electronics implements frequency conversion reformation of the spinning frame, it ingeniously places the large heat sink of the frequency converter into the suction air duct of the spinning frame. Through a steady flow of suction air to accelerate heat dissipation, the air volume and wind speed are far greater than the air volume and wind speed of the inverter's own fan, which can further reduce the operating temperature of the inverter and prolong the service life of the inverter.

Analysis of Effect of Frequency Conversion of Spinning Frame

1, reduce breakage, increase production

According to feedback from users in Henan, Hubei, and Shandong, where the cost of management, lighting, electricity, air-conditioning, labor, and other costs have not increased, 32 and 40 yarns are taken as an example. One is 420. Spinning machine, broken head can be reduced by about 40%, production increased by 5%. About 8-10 months can recover the cost of reforming the spinning converter. The above data is provided by the customer. There may be some differences depending on factors such as the status of each user's vehicle platform, cotton distribution, and variety.

2, do not have to replace the belt pulley when changing the variety

Because the frequency converter has the function of stepless speed regulation, no need to replace the belt pulley when adjusting the speed, the purpose of adjusting the speed can be achieved by changing the frequency (curve) of the frequency converter. As a result, the amount of labor for mechanics can be reduced, and more energy can be devoted to maintaining the equipment. In addition, the belt pulleys are frequently replaced, and the motor shaft and the belt pulleys will also have a certain loss during the replacement process. After frequency conversion, it can reduce the machine material expenses.

3, increase power factor, reduce operating current

Frequency conversion can increase the main motor power factor of the spinning machine and reduce the operating current. Reduced operating current reduces motor and line heating.

Conclusion

The use of special inverters for spinning for constant spinning spinning machines can improve the performance of the spinning machine with a small investment. After the transformation, the spinning tension is controlled, which can effectively reduce the breakage, increase the output, improve the spinning efficiency for the user, and reduce the cost of the ton yarn. It is a practical technological transformation with less investment, quick results, and good results.

Ladies Wear

Ladies Linen Skirts,Ladies Cotton Shirt,Ladies Cotton Skirts,Ladies Printed Viscose Dress

SHAOXING NEWTEX IMP.&EXP. CO., LTD , https://www.newtexgarment.com