Specifications of metal clothing operating parameters, carding, and impurities that are not uniformly mixed affect each phase, among which several parameters are working angle, needle tooth, tooth depth and other more important densities. 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. 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). 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. 1. The main working angle of the carding machine and the working angle cylinder a of the toothed pin-tooth combing machine, also known as the tooth surface angle. When a is large, the holding force of the needle teeth is poor, and the fibers are easy to slide out along the teeth. When a is small, the fibers are easy to sink to the needle (tooth) root.
The tangential force R and the normal force u are in a certain relationship. In theory, the fibers in the direction of the needle tooth surface will neither throw out the needle (tooth) tip, nor sink into the needle (tooth) root. The fibers immediately attach to the tip of the needle (tooth) and are combed by another needle face. Formula (3-10) expresses the relationship between and, 8.
The magnitude of the angle depends on the coefficient of friction between the fiber and the needle face. For cotton fibers, chemical fibers with a high coefficient of friction have a larger friction angle. The greater the centrifugal force of the cylinder, the greater the efij.
Fibers and fiber bundles are more likely to be thrown away. With the high-yield and high-speed development of the carding machine, the working angle of the cylinder pin tends to decrease gradually. When spinning on the a186 card, the working angle a of the needle teeth is 75-78.
When spinning chemical fibers, in order to facilitate the transfer of fibers from the cylinder to the doffer, the working angle a can be increased to 80. When the diameter of the cylinder body is reduced and the rotation angle of the cylinder body is increased, the working angle of the pin teeth should be reduced. In my small card the working angle of the cylinders has now been reduced to 58-65.
If the working angle of carding is too small, good grip and the ability to grab fibers can enhance the carding effect, but the fibers are easy to sink, full of clothing, and unfavorable for transfer. In order to strengthen both combing, fiber and prevent the tooth root from sinking after the design of the teeth, use a certain depth of sharp angle from the inside and outside of the circle to the window larger than the changed angle of 90 (called the negative angle). Therefore, under the combing force, the fiber not only does not sink, but allows its floating fork, by grasping the performance of the comb teeth between the combing needle cylinder and the cover, reducing the increase in needle cylinder load, such as SGS, JT49, etc.
In order to obtain sufficient transfer learning ability for students, Doffer Card Clothing Company should make the working angle U of the needle teeth smaller, generally in the range of 58-65.