Abstract:

For drawing and drafting fibers of different lengths on the FA322B drawing frame, partial process parameters of the drafting mechanism of the drawing frame are needed to artificial experience,but it is hard to achieve optimal drafting effect. In ordr to solve this problem, based on analyzing the operating principle of the drafting mechanism of the FA322B drawing frame, the modeling optimization was adopted to obtain the optimal adjustment position of the transverse distance between the  second upper and lower rollers, providing theoretical guide for the process adjustment in actual production. The influences of the transverse distance between the second upper and lower rollers on the drafting effect was also investigated. The results indicate that improper transverse distance between the second upper and lower rollers can carse fibers to adhere to the front upper roller, thereby greatly affecting the drafting effect. Therefore, transverse distance between the second upper and lower rollers should beadjusted carefully to ensure good drafting effect in actual production.

Key words: drawing frame, drafting mechanism, quality length of fiber, drafting effect