Abstract:

In order to solve the problem of long kinematic chain and poor machine adaptability for multi-bar warp knitting machine, E-cam drive actuator was adopted to meet the kinematical requirements of the needle bars. Critical simulation points were selected based on the characteristics of warp knitting technology and guide bar configuration to fit the theoretical track of needle bar tip. Specifically, the offset between front and rear seaming pattern guide bar tip lapping should not exceed the radius of curvature of the tip. The difference between the measured and predicted critical points in piezo jacquard guide bar and land guide bar regions are within ±0.25 mm range in x direction for 43/1 type warp knitting machine. The variation in pattern guide bar tip back lapping is 0~0.25 mm in the x direction, while seaming pattern guide bar tip front lapping renders variation below 1.95 mm. In the y direction, all the differences are within ±0.25 mm range.

Key words: warp knitting machine, multi-bar, E-cam, loop-forming