Test and control method for quantitative sliver
category： Industry Information
Release time：2024-08-27
The control of the cotton (or chemical fiber blended) strip ration, I .e. the average dry weight (g/5m) of the spun sliver, is an important measure to ensure the quality of the yarn and reduce the breakage rate. There are two kinds of control and adjustment range of sliver ration: one is the control of sliver ration of each eye sliver of a single machine, and the other is the control of sliver ration of all machines spinning the same linear density. The quantitative control of the whole machine is to control the weight deviation of the spun yarn and reduce the number of exchanges and workload of the draft conversion gear of the spinning machine. The quantitative control of a single machine can eliminate the difference in spinning weight between the machines of the drawing frame in time, which is conducive to reducing the weight unevenness of sliver and spun yarn and the weight deviation of spun yarn. For the allowable range of the difference between the average dry weight of the cotton sliver spun by the single machine and the whole machine and the designed standard dry weight, the production practice has proved that if the difference percentage of the dry weight of the cotton sliver of the single machine is controlled at about plus or minus 1%, the difference percentage of the dry weight of the cotton sliver of the whole machine (I. e. the average dry weight of the cotton sliver of each single machine) is generally controlled at about plus or minus 0.5, the weight deviation and weight unevenness of the spun yarn are sure to be within the range of 2%. Fine special yarn quality requirements are relatively high, so the control of the weight difference of cooked strips should be stricter.
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2024/08/27
2024/08/27
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