Abstract:

Spiral angle of the licker-in caused the fiber bundles to be combed by slant saw-teeth, which made fibers to by more easily damaged during the carding process of the licker-in of carding machine. To solve the problem, single saw-tooth was regarded as an object of study, and the mosaic and self-locking carding process was theoretically analyzed. Fiber stress was reaearced by building mechanical model under condition of different spiral angles. Also, the carding process of single saw-tooth was simulated with explicit dynamics module when spiral angle was 0°, 1° and 2°, respectively. The results show that when spiral angle is 0°，the friction force, stress and strain of fiber were smallest, and the larger the spiral angle, the more seriously the fiber was damaged, and the probability of fiber fracture is increased. Due to the spiral angle, the carding capability of single saw-tooth is declined, and the percentage of bundle fibers is increased, leading to the worse coming quality.

Key words: carding machine, lider-in, saw blade, spiral angle, explicil dynamics