Due to this cycle, mechanical factors influence the performance of the drafting process of the periodic cycle, resulting in the mechanical operation of the sliver with irregular cycles. 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). 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.
The structure of the double twisting unit of the double twisting machine mainly includes the spindle braking device, the spindle part of the double twisting machine, the yarn winding device, and the special device of the double twisting unit. A card loop unevenness that exists in the drafting process will eventually reflect on the carding and severely affect the appearance of the fabric. But sometimes it is precisely the cultural characteristics of Chinese mechanical technology factors that are used to design a transmission mechanism that makes the roller speed development cycle change constantly, and spin various slub yarns.
Any rotating part of the card drafting mechanism can be the source of uneven circulation. It is of great significance to analyze the causes of uneven design work cycle. If the length of the non-uniform valence interval of the strip period caused by a certain part is the wavelength, the influence of the wavelength of 2 mechanical factors on the drafting process can be summarized as the reciprocating oscillation of the tongs and the periodic change of the speed of the rollers.
(1) The offset of the outer circle geometric information center of the leather reel to the center of the hole of the leather reel caused by the reciprocation of the jaws of the carding machine for reciprocating oscillating cutting for processing or anti-silver meal failure will cause the movable jaws to reciprocate and swing continuously. It can be seen from Figure 3-6 (A) that the eccentric value is e, and the corresponding jaw swings an arc is AA'. When the front jaw swings forward, the actual gripping distance of Roller's equipment becomes larger, which delays the shifting of slow-moving fibers.
Since the fiber enterprises that have changed speed can still export at their original speed of exporting to China, the distance between fast-growing fibers and slow-speed fibers should be increased, and some details are formed in the sliver. On the contrary, when the front jaw swings in the backward direction, the Russian edge fiber will have a speed change in advance, and the result will be analyzed to form a thick section. Every time the eccentric leather bed rotates the system, there will be thick knots and detail problems in the yarn sliver.
Make the swing jaw and the eccentric bending roller there [Fig. 3-6(b)), the upper roller axis fluctuates on the roller axis, and the roll wrapping of hard and soft leather is uneven (2) The development cycle of the surface speed of the roller of the carding machine is constantly changing The periodic change of the surface speed of the carding roller will also change the draft ratio, and the silver streak will inevitably cause the periodic section thickness. The reasons for the periodic change of the surface speed of the drum are: 1. The roller is eccentric and curved to bend and eccentric the roller, so that the geometric center of the roller, which is deviated from the center of rotation, not only makes the jaws swing back and forth, but also due to the gyration in the rotation The change in radius makes the roll speed delegation cycle. Therefore, the eccentric roll should be strictly controlled during manufacture.
The main reason is often unevenness in bending into periodic yarns, so in addition to the correction in the production process, the use of plants is to be corrected for each flat pack. 2. The development cycle of the surface treatment speed of the roller is constantly changing due to the drafting transmission gear train, which is also a common drawback. The reasons are: low precision of gear design and manufacturing technology, too tight or too loose gear gnawing, insufficient rigid management of transmission shaft and bracket, etc.
The analysis of the causes of these problems may exist in every part of the drafting drive, which is characterized by the social influence of the entire roller. Each time the faulty gear rotates through a drum, it will form its own economic cycle fluctuation, and its wavelength is: .