Study on kinetic of loop-forming elements in warp knitting machine with multi-guide bars

Aiming at solving the key technique to develop warp knitting machine products with multiguide bars,the problems about optimization of the kinematic parameters of the loop-forming elements were studied.The process of loop-forming,motions of the loop-forming elements and the structures of the mechanisms of loop-forming elements were analyzed.The time ratio of the oscillation of the bars,the kinetic optimization of the cam mechanisms that drive loop-forming elements,and the phase angles of different loop-forming elements mechanisms are the keys to determine the motions of the compound needles and the working performances of a warp knitting machine with multi-guide bars.The curve shape of a groove pin is determined by the time ratio of the oscillation of the bars.The warp knitting machines that are driven by the cam mechanisms with continuous jerk curve can avoid impact.The groove pins and closing needles can move with smaller acceleration when the phase angles of different loop-forming elements mechanisms are smaller.