Mechanical And Electrical Technical Pformation Plan For Sizing Machine

< p > GA301 - 240 type twin pulp tank < a href= "http://www.91se91.com/news/ > sizing machine < /a >, is a relatively advanced domestic model.

But with the development of air-jet looms and the improvement of weaving grades, the machine has been unable to meet the needs of production in terms of warp unwinding tension control, pressure and control of press roller, weaving axis winding a href= "http://www.91se91.com" > mechanical /a > performance, electrical control reliability and so on.

To this end, Yizheng chemical fiber weaving factory jointly with Shanghai textile complex Consultation Service Co technical personnel, GA301 - 240 double pulp slot sizing machine field inspection, the development and implementation of technical pformation work.

Since last October, after the technical pformation of the machine, production practice has proved that it has achieved the expected goal of technological pformation.

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< p > 1, GA301 - 240 sizing machine pformation plan < /p >

< p > 1, warp unwinding tension control < /p >

< p > before the technical pformation, the machine uses heavy hammer pressure to carry out warp unwinding tension control.

Not only the tension of the warp winding is large, but also the tension difference between the shaft and the shaft is large.

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< p > technical pformation cancelled the heavy hammer pressure, changed to pneumatic pressurization and PLC programmable control.

According to the test of the whole process of warp axis unwinding, combined with the characteristics of the sizing production and operation, the corresponding pressure is automatically applied to control the unwinding tension of the warp under different running conditions. The practice proves that the scheme is reliable and effective.

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< p > 2, high pressure sizing linear pressure control < /p >

P > the sizing machine of the original GA301 sizing machine adopts double dip double pressure, and the second pulping roller is pressurized by high and low speed two level switching control mode.

The grouting mechanism is shown in Figure 1.

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< p > 1, pressure roller 2, sizing roller 3, balance tension spring 4, pressurized cylinder < /p >

< p > there are the following deficiencies in such pressurizing mechanism and control mode: < /p >

< p > (1) due to the use of a balanced pull spring, it is easy to cause uneven sizing.

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< p > (2) the grouting force is low, and the most high pressure pulp is only 6 - 8KN.

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< p > (3) two stage switching pressure control, in the high pressure zone, the speed change and the grouting force remain unchanged, leading to the fluctuation of the sizing rate with the change of vehicle speed.

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< p > the new technology of high pressure sizing and linear pressurization control is adopted in the technological pformation.

That is to say, the balance pull spring is cancelled; the double acting cylinder is used to carry out the pressure control in the double acting cylinder; the inner roller structure of the olive structure is used to replace the second pressure roller and the sizing roller; the maximum grouting force is designed to be 25KN; the grouting force is controlled by a microcomputer, and the speed of the human machine interface is set to show the same speed and linear pressure. From the graph two, we can see that the grouting force is controlled by linear pressure, and the speed of the pulp yarn has no effect on the increase rate of press out. When the two stage switching mode is adopted, the weighting rate of the extruding increases with the fluctuation of speed.

The linear pressurized sizing rate is stable.

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< p > high voltage linear control.

The use of computer + human-machine interface, which gives us great convenience in technology and operation.

It can be set and displayed on the human-machine interface, such as switching speed, maximum pressure and maximum line speed, which can conveniently adjust the slope of linear pressure to meet the sizing requirement according to the variety requirements.

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< p > 3, frequency conversion drive weaving winding < /p >

< p > > a href= "http://www.91se91.com/news/index_c.asp" > GA301 sizing machine < /a > weaving shaft winding mechanism, is the use of spinning machine production of GZX PIV winding mechanism.

In the long term production practice, it can not meet the winding requirements of the 110 - 800 specification warp shaft. Its mechanical failure is frequent and its maintenance is complex. Many sizing workers have a headache.

In order to solve these problems, Yizheng chemical fiber mill has even adopted the PIV winding mechanism with a pmission ratio of 1:10, which can not solve the problem.

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< p > we have tested the winding tension characteristics of GZX type. It is found that winding tension gradually decreases with the increase of the winding diameter of the weaving spindle, especially when the winding of the large air-jet winding spindle is larger than the diameter, the winding tension decreases twice as much as the initial winding tension and does not meet the requirement of constant tension force winding.

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< p > > therefore, we cancelled the PIV mechanism of the original machine, adopted the new technology of synchronous speed control digital variable frequency drive, and carried out winding data acquisition, communication, processing and automatic control of the winding tension of the weaving shaft with the process software to pform the winding mechanism of the weaving shaft, so as to achieve the purpose of winding constant tension of the weaving shaft.

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