Analysis Of Three Ways To Improve Sizing Quality

< p > < strong > method 1 pform the warp axle shelf < /strong > /p >

< p > < strong > improving winding unevenness of sizing machine < /strong > < /p >

< p > at present, the a href= "//www.sjfzxm.com/news/" > sizing machine < /a > mostly adopts the passive rewinding method, which is often equipped with a yarn tension adjusting device on the sizing machine frame.

There are two kinds of common belt heavy hammer and elastic pressure clamps, whose adjustment effect is greatly influenced by the operator's experience level.

Once the adjustment is not in place, the uneven tension will not only cause the waste of yarn, but also cause difficulties in weaving and affect the quality of grey cloth.

In practice, we found that by properly modifying the rewinding part of the warp shaft and increasing the tension induction device, the unwinding tension of the sizing machine can be solved.

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< p > for this reason, we have installed a fixed short shaft on the warp frame on both sides of the sizing machine, so that the swing frame can swing around the short axis and set a pointer on the pendulum frame. The tension roller is mounted on the swing frame and can swing along the swing frame.

The pendulum frame is a double arm structure. A tension roller is installed on one side arm, and a counterweight is installed on the other arm, so as to prevent the guide roller from producing additional additional tension on the warp yarn.

When unwinding, the tension roller perceiving the yarn tension on the warp layer, so as to ensure the consistency of the axial tension is ensured by the uniform display of the results of each axis pointer.

The size of the tension can be achieved by adjusting the clamp on the warp shaft.

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< p > through repeated tests, we found that when making the tension induction device, we should pay attention to the following points: the short shaft is not suitable for making the shaft, and the length is not allowed to enter the warp yarn within the width of the warp so as not to affect the running of the warp yarn; the tension roller can use seamless steel pipe with a diameter of 50 millimeters, and the small shaft is welded at both ends, and the surface is rust treated. The tension roller can not be too small to prevent flexural deformation from affecting the flexibility of its rotation; the weight of the swing frame must be adapted to the quality and tension of the guide roller, so as to prevent the yarn from being overstretched.

In addition, in the production process, we should pay attention to the yarn unwinding way, and do not use the mutual unwinding way to ensure the independence of the warp tension.

We have received the expected results through sizing the warp yarn with 72.9 special linen viscose blended < a href= "//www.sjfzxm.com/news/index_c.asp" > spinning < /a >.

The device has simple structure and less input, and can achieve uniform unwinding tension, reduce warp consumption and improve the quality of cloth surface.

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< p > < strong > method two adopts three pulp trough sizing machine < /strong > < /p >.

< p > < strong > eliminating the phenomenon of large difference in warp coverage rate < /strong > < /p >

< p > at present, there is a notable feature in the development of sizing technology, that is, on the basis of high and high density, the sizing technology of diameter less than a href= "//www.sjfzxm.com/news/index_c.asp" > fiber > /a > dyed fabric has developed rapidly, but these sizing techniques still have some shortcomings.

For example, because of the different fabric, the proportion of the total number of roots can vary greatly. Sometimes there will be nearly 10000 warp yarns with a total number of roots, and the number of warp yarns of the different diameter fibers is less than 1000 or even less. This makes the warp cover coefficient of the two pulp tanks of the twin pulp slot sizing machine differ greatly, and it is difficult to control the elongation and tension of the warp yarn, which will affect the sizing quality.

At the same time, the yarn dyed fabric is developing in a highly difficult direction. Not only the total number of roots is increased, but also the color changes and the organization structure tends to be complex. In order to prevent the warp of different colors from passing through each other during sizing, it is necessary to separate different sizing tanks.

In order to solve the problem that the twin pulp slot sizing machine can not solve, the sizing machine with three pulp tanks is used.

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< p > GA311 three sizing trough sizing machine is a newly developed sizing equipment developed by Heng Tian heavy industry Limited by Share Ltd.

Through practical production, we can see that under the same Sizing Pressure and the same slurry formula, the three pulp sizing machine has many advantages, specifically speaking: because of the reduction of the covering coefficient of sizing and drying, the size of Mao Yu is reduced by about 20%, the size of the film is even, and the wear resistance of the sizing is increased.

At the same time, we can also find that sizing efficiency on the GA311 sizing machine can be increased by more than 10%.

When the GA311 sizing machine produces multicolor products, it can meet the requirements of sizing and layering drying of different color yarn troughs, reduce the problem of "matching color" between yarn and yarn, reduce the size of yarn hairiness and increase the number of yarn abrasion. In the process of weaving, the color and stain of fibers and fibers caused by the fiber shedding from dark warp yarn to the light colored area of fabrics are reduced. The quality of products under the first grade is better than that of GA308 and TOYOTA sizing machines, and the number of sizing defects is significantly reduced.

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< p > < strong > method three change the pressure roller structure < /strong > < /p >

< p > < strong > solve the problem that the pressure can not withstand the yarn. < /strong > < /p >

The < p > GA308 sizing machine is an advanced dual sizing machine in our country. Our company has purchased 4 units, accounting for more than half of all sizing machines. It is responsible for the main sizing task, especially for jet products.

In the process of using some sizing values, the lathe operator reflects that a sizing machine appears to be unable to hold yarn in the middle of the pressure roller, and when the lower shaft cuts yarn, the central yarn will shrink back to the dry area seriously.

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< p > generally speaking, pressure is evenly distributed in the direction of roller length, and the yarn on both sides and middle is subjected to the same pressure and is compacted.

However, in fact, as the drag roller and the pressure roller are not absolutely rigid, they will be deformed when subjected to pressure. The greater the pressure, the greater the deformation. The direction of the deformation will make the yarn pressure at both ends of the two rollers and the pressure of the central yarns become larger, and the ends and the central yarns are all pressed. When the pressure reaches a certain level, the pressure at the two rollers will increase rapidly, while the middle pressure will become smaller and smaller. Even the gap between the two rollers will appear, and the pressure will disappear.

After the yarn is cut, the yarn will lose the front tension immediately, and the central yarn will shrink back to the dry area due to the stress of no drag roller.

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< p > through analysis, we have grasped the law of force and deformation of towing rollers, that is, the pressure of the middle part of the roller has a peak value, the pressure at the beginning increases, the pressure of the roller on the yarn increases; when the peak value is reached, the pressure increases, the pressure on the yarn in the middle of the roller will decrease, the pressure will further increase, the pressure on the yarn will disappear in the middle part of the roller, and there is an interval with higher pressure and looser yarn, which is also present in the press roller.

To solve this problem, the designer changes the structure of the press roller, connects the extension shaft and the cylinder head, pressurized the head of the roller, and is changed to the extension shaft and the middle part of the cylinder, and is pressurized in the middle of the roller.

In addition to solving the problem of loosening yarn in the middle part of the drag roller, too much pressure is added. Besides increasing the rigidity of the rollers, we are also connected with a pressure regulating valve in the traction roller and pressurized gas path. The pressure of the pressure regulating valve is adjusted to the air pressure corresponding to the maximum pressure of the yarn in the center of the drum, which can effectively prevent the occurrence of excessive pressure. Even if the value of the original pressure roller is adjusted again, the pressure will not exceed.

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