The most obvious feature of the self-twisting yarn of the quilt production line is the uneven distribution of different twists. 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. 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. Carding machines are used to process cotton fibers and chemical fibers and belong to textile machinery. According to the spinning process, carding is an important process.
The front process of the carding machine is the opening and cleaning machine, and the latter process is the drawing frame (carding process) or the sliver coiler (combing process). ST yarn has a certain period of S twist and Z twist, and there is a twist zone between S twist and Z twist. Since the self-twisting yarn is self-twisted into the yarn by the untwisting torque of the single sliver, the twist distribution of the self-twisting yarn is dense in the middle, and the two ends are thinner (because the reciprocating speed of the twist is changed by the sinusoidal function).
However, STT yarns are twisted in only one direction. But there are strong twists, medium twists and weak twists. Due to the difference in twist, the cross-sectional shape and size of self-twisting yarns also change periodically.
The section is round and compact, and the weak torsion section is flat and loose. In most cases, self-twisted yarns are looser than the same ring-coated yarn. The cross-sectional diameter is also larger.
Due to the characteristics of the twisting principle of the self-twisting yarn of the quilt production line and the uneven distribution of the yarn twist, the self-twisting spinning of the quilt production line is not suitable for processing cotton and cotton-type chemical fibers. Self-twisting spinning is suitable for different lengths of raw materials and is generally 60~230mm, and in our world, the longer the fiber, the easier it is to affect the spinning. Therefore, my country's current self-twist spinning can be mainly used for medium and long fiber spinning and worsted wool spinning in enterprises, and the wool must not be too thick, and the general quality of life count is more than 58.
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