The movement of airflow, fibers and impurities in the first impact zone When the carding roller rotates, due to the rough surface of the roller and the sticky air, the sawtooth roller transports part of the fibers to the cotton board, forming an adhesion layer on the surface of the roller. 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. 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 thickness of the adhesion layer of the dust removal knife is the largest. The farther the dust removal knife is from the cotton board, the thicker the adhesion layer, otherwise the thinner the adhesion layer.
The distance between the dust-removing knife and the licker-in is very small, so we only have such a small amount of two parts of the air comb that can follow the surface of the licker-in to pass through the orbit. Most of the rest of the students are blocked by the dust-removing knife. Short fibers, dust, impurities, etc. floating in the boundary layer of the licker-in surface are also blocked by the dust removal knife along with the airflow and fall down. In Figure 2-3, at the lower end of the cotton feeder near the licker-in, since part of the air is taken away by the licker-in, the pressure drops, so a part of the air is returned from the middle of the car body, and the other part of the air is fed from the edge of the rear frame. Fill under the cotton board to form an air applicator.
Since the distance between the cotton feeding board and the dust removal blade is not large, the supplemented air has a supporting effect on the short fibers and dust floating under the licker-in roller, so that they will pass along with the surface layer and cannot sink quickly. . If the distance from the dust removal knife to the width of the feeding board is small, or the angle between the working surface of the dust removal knife and the surface of the licker-in is very small, a turbulent flow will be formed in the triangular space between the feeding board, the licker-in and the dust removal knife. The dust and short fibers blocked by the dust removal knife are taken away by the licker-in roller again. If the distance between this area is large, or the missing angle between the working surface of the dust-removing knife and the surface of the stick is large, and there is no dust-removing surface under the cotton feeder, the recovery capacity of fibers in this area will be reduced. The waste below the belly door contains more fibers.
It is necessary to form oneself with the air flow in the area of the feeder plate, licker-in roller and dust removal knife, otherwise the long fibers will easily lead to falling. But it is impossible to hope that a scourge can be formed and a large amount of dust and short fibers can be recovered. The main economic factors that affect whether the ratio recovery is effective or not are: 1. The distance between the cotton board and the dust removal knife.
2. The angle of the cleaning surface and the cleaning surface below the cotton board. 3. The size of the angle between the working surface of the dust removal knife and the surface of the licker-in. All of these, when formulating the process, must be taken into account.