There are three different situations for removing these impurities by the dust-removing knife of the carding machine, as shown in Figure 2-4. 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.
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). 1. Under the action of the centrifugal force of the licker-in roller, hard impurities with small size, large weight and smooth appearance, such as broken seeds, etc., will directly fall in the gap between the cotton feeding board and the dust removal knife.
2. Larger reflection, lighter weight, seeds with broken fluffy fibers on the surface, sterile seeds, etc., after leaving the tip of the sawtooth, they are blocked by the airflow in the attachment layer, and the falling speed is slow, and most of them fall after the impact of the dust removal knife. . image 3. Due to its large size, light weight, and fluffy shape, due to the air resistance of the boundary layer, it is not as good as sinking.
Knives that are installed at an angle or recovered with the ability to remove impurities have a lot of dust. The effect mainly occurs in two cases, when the seed coat or dead cotton fibers hit the fiber sheet and the tip of the dust removal knife, whether the impurities directly related to the installation angle of the dust removal knife are easy to fall. When the center line between the knife and the thorn tip lead series extends a greater angle from the dust particles on the blade surface, the knife tip resistance of the dust particles is less, respectively, and the serrated roller is stabbed to continue with less impurities, from the thorn Transfer the stick to the cylinder on the fiber for a cleaner finish.
The installation angle of the dust removal knife is not only related to the reduction of impurities at the tip of the dust removal knife. On some models of carding machines, when the inclination angle is too large, the impurities and fibers removed in the first trashing area will pass under the dust removal knife and be sucked into the small leakage bottom. Analysis of its recycling and utilization As shown in Figure 2-5. In order for us to further study and confirm the above problems, we have carried out the following specific work and tests on the recovery of impurities in the maintenance and existence of impurities on the carding machine.
Process conditions: the first head closes the impurities 46.04 mm, the lower surface of the cotton sheet without removing impurities, the pressure gauge of the receiver inlet is 7.14 mm, the installation angle of the dust removal knife is 105°. Raw cotton length g blended cotton average hand pull length 28.18 mm (ie 35.5/32 inches). Then, adjust the length of the second economical littering area respectively, and observe the recycling situation and the change of the noil in the first and second littering areas.
The analysis of the results is shown in Table 2-8. Table 2-8 shows that as the open area increases, the length of the second open area increases, but is not the largest, and the open area decreases due to the retention effect. The impurity content in the falling ball is low, but not significant.
In contrast, the length of the first drop zone was not adjusted, but also changed, and the change was more significant, that is, the growth of cotton cyanine, the percentage of drop impurities was significantly reduced. This is because when the second area is lengthened, the fibers in the first area are not easily introduced by the air supply from the small drain, and the amount of recovery decreases and falls into the rear of the car. In order to recover the fibers, the airflow in the triangle of the first trash zone of the card should be fully utilized.
In the second impurity zone, we mainly set to remove some small impurities and some short fibers individually, and do not want to recover the long fibers in the first impurity zone. In this way, higher impurity content and impurity removal efficiency can be obtained.