In recent years, various chemically treated sweat and cotton fiber processes have required better size and chemical properties that differ in physical size. 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 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. 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. Therefore, the card cannot be used to handle cotton spinning process chemical fibers. Chemical research fiber cells do not contain A and B impurities, but contain rigid block, strand block, filament and super filament fiber.
The fiber length of chemical and fiber is longer than that of cotton fiber, the fiber has higher length uniformity, the friction coefficient between fiber development is small, and the lint content is very small. The moisture regain of chemical structural fibers varies, for example, the content of glue fibers is greater than that of cotton, and the content of synthetic nanofibers is less than that of cotton. The electrostatic interaction time of chemical analysis fibers is relatively strong.
If the cotton spinning process is used to produce and process chemical industrial fibers, the fibers will be broken, and part of the long fibers will fall into the belly of the car or the cover flower, winding the Xinjinlong licker-in, the cotton net will float or sag, the cotton net will be broken and adhered. The components of each channel, the cotton sliver is fluffy, and the sliver inclined tube channel is blocked by traffic. In addition, there will continue to be a phenomenon of low strength and uneven dryness. Therefore, when spinning chemical fibers, the carding process optimization and configuration enterprises must be able to fully and comprehensively card, transfer smoothly, and eliminate less according to the characteristics of student chemistry as fibers.
1. Properly raise the cotton board to increase the length of the working surface and prevent fibers. 2. Raise the position of the dust collector, increase the angle of the dust collector, and use cotton to shrink the belly of the car. 3. Use a new blade roller for piercing, the specification is tooth 75°X4.5 / 25.1 mm, the thickness of the tooth tip is 0.15? adjacent.
25mm or less. This ability to perforate the leaves, the carding effect is good, and it has a certain effect on reducing neps. 4. The length of the bottom chord is 8-9 inches to achieve the purpose of reducing the waste of the rear belly.
5. The arc length of the large leakage bottom is shortened from 25 inches to 23 inches, which can alleviate the air deflection at the entrance of the large leakage bottom, reduce the possibility that the cotton layer transferred to the doffer by the enterprise is washed down by the airflow, and prevent the cotton Holes in the net can reduce the damage of metal card clothing. 6. Properly reduce the speed of the main part. Because the speed is higher than the strength of cotton, the lower cylinder chamber and the licker-in stick to the fiber, which can prevent damage to the fiber.
When spinning synthetic fibers, the surface of the cylinder and the licker-in ratio is relatively high, typically (1.6-2.46):1. Therefore, the punch rolls are often slowed down. Since there are no chemical impurities and few short locks, the cover plate flower should be reduced, so that the corresponding flattening speed is slowed down.
Corresponding to the speed of spinning pure cotton Doffer speed, also Doffer phone slower speed. Chemical fiber spinning wool structures that require good uniformity, all exhibit a single fiber state. The general division of labor is appropriately enlarged.
Chemical fibers have poor electrical conductivity and a high coefficient of friction with metals. When carding chemical fibers on a carding machine, a large amount of static electricity is easily generated, which makes the fibers adsorb on the needle teeth, and the phenomenon of too small separation around the needle teeth occurs. The distance between the cylinder and the pile is typically increased to 0.305-0.406 mm (0.012-0.016 in).
The distance between the cylinder and the front top cover is 0.838 mm (0.033 in) to ensure a certain amount of flatness and to eliminate some imperfections. The distance between the roller and the doffer should be controlled within the tolerance range, if the local is large, it may be due to poor delivery and congestion, and the flatness reaches 0.051 mm (0.002 inches). 8. Preferred carding elements.