The movement of the combing formula (5-18) is completed according to the normal winding by the transmission of card lilies, lily belts, fork lilies and other parts. 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. 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). The main curve discussed below is to tease out the shape of the normal wound to meet how the lily goes. Corresponds to c lily radius - Y, which can be about O'X“Get the rotation of the axis.
Practice has proved that the measurement results of the theoretical elongation curve should be corrected by carding. The load of the gun varies, and the belt has the phenomenon of climbing experiments, etc., resulting in a belt with different degrees of tightness. Due to different pressing pressures, the winding tension is different. 3 Due to the different pressures of the big and small yarns, the thickness of the inner and outer carding layers is different, and the increment of the winding diameter is also different, that is, b is not a constant, and s is always a constant, so the ratio of b to s between layers is also different.
Iron gun card correction meticulous work in the trial spinning process needs, according to the actual change of the correction, repeatedly comb the elongation. Design, Lily 1.1 to 1.2 times the total length of the belt's total stroke, and two radii Lily typically 120 - cam 140mrn. There are also studies using different linear iron guns on some carding machines. As shown in Figure 5-30, the movement of the belt is controlled by the cam, and the cam is controlled by the detent of the forming technology device, and each time it uses a certain angle of rotary motion.
Because the radius of the cam is different, the moving amount of the belt is not equal each time. This disadvantage does not affect the existence of a curved iron gun with the same amount of information movement, but it is difficult for the curved iron gun processing enterprise. Some foreign carding machines cancel the iron gun and use the PIV stepless speed change device to realize the change of the winding speed, as shown in Figure 5-31.
At present, part of the wrapping machine is installed in a separate motor-driven lane, and the speed converter installed on the motor is synchronously controlled by a microcomputer. The computer can automatically change the speed of the winding mirror according to the change in the winding diameter, or it can use the ceo sensor installed on the carding machine. Measure the position where the yarn sliver falls in the spinning section to signal, and make necessary corrections to the speed of the winding system, so that the speed during the winding process is adapted to the line speed of the front roller.
Due to the cancellation of the iron cannon, the development of machine learning can be further improved, the winding speed can be effectively managed and controlled, and the machine and the rear are neat, which is conducive to maintenance.