1. Increase the bending resistance of the steel needles used (1) Shorten the needle height of the comb: The shortening of the needle distance can reduce the plug and enhance the bending resistance of the comb. 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.
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 needle height of the new metal card clothing is usually reduced to 7.5-5mm.
After calculation, when the needle height is reduced from 10mm to 8mm, the maximum deflection of the copper needle is 36.4% of the original. In order to reduce congestion, it is also possible to make the upper knee smaller than the lower knee by changing the height distribution of the upper and lower knees in China. The total needle height-H is shortened, and at the same time, we can effectively reduce the load on the cover plate and improve the working conditions of students.
(2) Changing the cross-sectional shape of the needle teeth, such as from circular to flat, triangular and biconvex, can improve the bending resistance of metal card clothing. (3) Increase the diameter and cross-sectional area of the steel needle: From the point of view of carding force, the longitudinal bending resistance of the copper needle should be increased, but when the cross-sectional area of the copper needle is increased, the number of needles per unit area should be reduced, because the high-speed and high-yield half Rigid or rigid clothing points are generally reduced, so this contradiction should be taken into account. (4) Material selection: The selection of steel needles with high carbon content makes the sharpness of the needles sustainable, increasing the amount of carbon material hardness can be improved, and infiltration of rare elements can improve wear resistance and toughness.
(5) The structure of the bottom is changed: the multi-layer is developed to full plastic, and its gluing ability level is increased. In the past, most of us could use three to four layers, but now we use six-layer, seven-layer network or even one eight-layer, with a thickness of 2mm. Increase to 3.5mm. Even up to 4.5mm. Swedish ABK company SP type anti-construction base fabric, the base fabric is covered with a 3-4mm thick foam metal rubber surface (the total thickness of the base fabric is 4.2-4. 5mm), which can not only make the base fabric firmly hold the steel needle, but also As a steel needle, it has a large elastic horizontal displacement and good resilience. 2. The device and from the larger use flat card clothing from the lateral end of the needle punch twill and satin needle punch, the needle from the lateral direction, the number of needles is inversely reduced the number of rows from the tip can improve the lateral comb.
There is restraint by a thin sealing arrangement in order to improve the carding of the fibers. Thin needles are used where the toe end is larger, so that students can ease carding and congestion is reduced, while the heel end is smaller, which is beneficial for enterprises to strengthen carding. 3. The working angle Qr of the carding machine is small, which increases the ability of the cover to grab and hold the fiber, the carding effect is strong, and the fiber elongation rate is good, but the cover flower increases, and the working fiber load increases.
With the increase of the working angle, the cover flower decreases, and the load of Xinjinlong decreases. The working angle of the new cover is generally 72°-78°between. Figure 4.
The results show that neps and yarn impurities are reduced, sliver and yarn quality are improved, but flattening is increased. Due to the increase of the cross-sectional size of the steel needle, the density of the needle tip cannot be too high. Only on the premise of ensuring the bending resistance can the tooth surface density be properly increased, which is about 290-520 needles 1 (25.4 mm) 2 . The large-toothed card clothing is used for spinning spun yarn or ultra-fine yarn, and the small-toothed card clothing is used for spinning cracked, medium or chemical fibers.