Design of looping motion device of warp knitting machine
Loop forming motion of warp knitting machine a For a planar linkage mechanism, it is not easy to find a suitable trajectory line from a large number of existing curves when it is necessary to achieve certain trajectory requirements because of the rich shapes of the linkage curves generated at different points on the linkage plane. In order to solve this problem, the scale synthesis methods of various track mechanisms have been developed.
The knitting mechanism comprises a needle bed, a comb, a sinker bed and a pressing plate, which are generally driven by a cam or an eccentric connecting rod. Cams are often used in folding machines with low speed and complicated motion rules of looping parts. Eccentric connecting rod is widely used in equipment due to its smooth transmission, simple processing, low wear and noise during high-speed operation.
There is a loop forming process for forming warp knitted fabrics by forming loops of warp yarns in series on a non knotting machine. The loop forming process is realized by the coordinated movement of needles and other loop forming parts (sinker, yarn guide needle, pressing plate). The size parameters and relative position of the loop forming parts have a significant impact on the loop forming process. Device design