Interpret the principles and uses of spinning frames
1. The concept of spinning machine
A spinning machine that drafts, twists and winds semi-finished rovings or slivers into spun bobbins during the spinning process. The cooked sliver is drawn and twisted on the roving frame to make roving. The roving is drawn and twisted on the spinning frame to make spun yarn. The sliver is drawn and twisted on the roving frame to make roving. The combing machine combs the fibers into combed slivers and needles. The carding machine combines the slivers, the needle row drafts to improve the sliver structure, and the roving is further twisted and spun into spun yarn on the ring spinning frame.
2. The main basis for measuring the production quality of spinning machines
1. Spindle and spindle speed
The production level of the spinning frame – the spinning frame is the main machine for spinning. The output and quality of the spinning machine are a comprehensive reflection of the quality of each process in the spinning process. The production unit of the spinning frame is the spindle, and the production level of the spinning frame is often measured by the output (kg) per thousand spindle hours. The production scale of spinning mills is expressed by the total number of spindles with spinning machines.
2.End breakage rate
The yarn spun on each spindle will break due to various reasons. The breakage rate is often expressed as the number of breakages that occur in one thousand spindle hours. The end-break rate affects labor productivity, equipment productivity, spinning quality and workshop dust content.
3. Roll packaging
The spinning frame is the most energy-consuming machine in spinning production. During the production process of the spinning machine, production will be stopped when a package (cop) is full, and spinning can continue only after the fallen bobbin is replaced with an empty bobbin. Therefore, the size of the package affects labor productivity, equipment productivity, and energy consumption.
Spindle speed, package, and end-break rate are interrelated and restrictive. They are signs of the technical level of the spinning machine. They need to be comprehensively considered from social, technical and economic aspects to determine the more appropriate value.
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