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The relationship between cotton length and unevenness of quilt production line

Author:Xinjinlong Machinery-Fabric Recycling Machine Manufacturer

The unevenness of the sliver of the quilt production line is closely related to the length of the test segment, and the unevenness rate obtained by different segment lengths is not the same. Grinder A spinning machine that turns fiber strands into rovings. The main function is to draft and twist, and to wind the roving into a certain package to meet the processing requirements of the spinning frame.

Special equipment for the textile industry on the winder. As the last process of spinning and the first process of weaving, winding is the link between the past and the next.“bridge”Therefore, it occupies an important position in the textile field. During the spinning process of the spinning frame, the semi-finished roving or sliver is drafted, twisted, and wound into a spinning machine. The combed sliver and the needle-carding machine combine the sliver, the needle row is drafted to improve the sliver structure, and the roving is further spun into spun yarn on the ring spinning frame, which is the main spinning machine.

The actual measurement shows that the spun yarn unevenness rate of the 100-meter segment is about 2.5%, while the Ubbelohde unevenness rate measured for the 8 mm segment is 15% or even greater. In order to explain the relationship between the unevenness of the yarn and the length of the segment in the quilt production line, the yarn can be divided into many segments of equal length. Because the weight of each segment is not equal, the unevenness between segments can be calculated. rate, called the external unevenness rate. If any important segment and inside the yarn structure are subdivided into segments with a very small proportion, the weight between the teaching of these extremely small target segments can also be calculated as the unevenness rate, which is called the unevenness rate in this segment , or the internal unevenness for short.

If all the researched yarns are divided into segments with a very small part, the unevenness of the whole yarn can be obtained, which is called the total unevenness. When the taken data segment is of any length, the square of the total unevenness of the yarn is the sum of the squares of the unevenness within the segment and the unevenness between the segments (when the unevenness is represented by the variation correlation coefficient) for the same batch of yarns, Its total unevenness is a certain value. When the image segment is shorter, the unevenness rate between segments (that is, the outer unevenness rate) is closer to the total unevenness. When the length of the segment increases, the outer unevenness rate gradually decreases. When approaching the total length of the world, the outer unevenness tends to zero.

The general development trend of the long-skin relationship due to the relationship between the design lengths of different fragments of the sample. At present, measuring the non-uniformity of long or short segments for the yarn is the outer non-uniformity. After the characteristic length of the segment of cotton yarn increases significantly to 2"'"'3 meters, the non-uniformity value has tended to be socially stable. Therefore, the difference between the unevenness of the 50-meter-long half-ply yarn and the unevenness value of the 100-meter-long yarn has little difference. The reading unevenness value of 8 mm of spun yarn measured by Ustor is close to the total unevenness.

When there are various samples in the capacitor electrode slot, we can approximate this standard capacitor as a flat-plate capacitor based on a multi-layer network medium (air and yarn) connected in series. The capacitance of this traditional capacitor is g . The above formula reflects the relative change in material capacitance as a function of filling degree a and sample permittivity e. For the same sample, the change in temperature mainly depends on the temperature.

When very small, 6.C Xuan's relationship has less influence. When E continent and at the same time, 45 = children. up When the dielectric coefficient of the sample can be very large and the full degree of the sample in the capacitor is very small, the relative development of the capacity is independent of the dielectric coefficient of the sample and equal to the full degree of the sample in the capacitor. When the measurement result is proportional to the volume (or weight) of the sample in the capacitor.

If the capacitance is large, the proportional relationship between the relative change of the capacitance and the volume of the test plate will be destroyed, and it will be seriously affected by the change of the moisture content, so l cannot exceed a certain limit. Therefore, there are eight different lengths on the Wushi Uniformity Tester. The width of the pole groove, the different grooves are strips, rovings or yarns of different thicknesses.


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