The feeding roller and feeding plate of the carding machine form a strong grip (jaw) on the cotton layer to ensure that the licker-in roller can effectively card and remove impurities on the cotton layer. 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 weight of the cotton roller company itself does not change much. In order to obtain enough gripping force for students, it must be developed that the two ends of the cotton roller can be designed to pressurize. If the pressure is insufficient and the holding force of the supply roller of the cotton layer is too small, then the licker-in will become larger than the fiber bundle or be captured before the cotton carding layer has not been sufficient and should not be affected by spot combing impurities; if If the pressure is too high, severe bending of the feed roller (middle arch) will occur, resulting in a middle circle with reduced holding force, which is not conducive to carding and cleaning.
In the past, the pressure value for a 57 mm feed roller was around 2-4 kg/cm. With the high-speed development and high-yield of the carding machine, after the speed of the licker-in is continuously increased, the carding force and the grasping force are doubled and increased, and the cost of both ends of the feeder roller increases accordingly, which can make the diameter of the feeder plate also increase. Account for correspondingly increased to 70 ~ 80 mm. At present, the pressure value of the 80-meter cotton roller can reach 6kg/cm.
The card can use levers or springs to pressurize both ends of the feed roll (Figure 2-11). According to the pressure distribution of the cotton layer, the pressure p should be balanced with the reaction force of the cotton layer. In order to ensure that the uranium bearing of the feeding roller does not generate lateral pressure in the bearing seat, so that the pressure acts on the cotton layer smoothly, so that the feeding roller is not hindered by the friction generated by the lateral pressure when moving up and down, so as to ensure that the cotton layer is in the clamp. Pressure stability at the mouth.
Therefore, when designing a roller housing, the direction of the sliding groove should be the same as the direction in which the pressure is applied. The card feed roller and the feed plate by the jaws should ensure that the lap joint is gradually compressed in order to smoothly push out a circle of jaws. Therefore, the equidistant interval between the feeding roller and the feeding plate arc-shaped jaws should not be so along the movement direction of the jaws. The cotton layer in contact with the gripper (Figure 2-12) has a more reliable commercial lift.
After pressing the thickness of the minimum gauge of cotton in the jaw, the number of different branch gage volumes, usually about 0.6mm. The central angle corresponding to the arc jaws of the feeding board of the carding machine. It should not be too large, generally around 50.
If the value is too large, the cotton layer will be easily wrapped around the feed roller, resulting in entanglement of cotton and affecting the work of the feed roller. The rolls 45 are steel usable, preferably hardened surfaces. In order to improve the gripping ability of the cotton layer, the surface is grooved 11 with straight grooves or spiral grooves.
The effective holding point (line) of the cotton layer on the cotton layer with straight grooves will move forward and backward when the car rotates. It will directly cause the short segments of the tampon to be uneven. The uniformity of the feeding speed can be improved by increasing the number of grooves on the feeding roller and changing the straight line and groove to a helical groove. The new carding machine has adopted 48-54 spiral groove tips.