The effect of strand size on warp wire elongation

    The elongation and deformation of the warp wire opening is a complex process, for simplicity, it is assumed that the position of the gib and the gib is fixed, and the gib formed is symmetrical in the height direction at the same time, and the effect of the size of the gib on the elongation and deformation of the warp wire is examined in this ideal state:

(1) the height of the gibbet on the elongation of the warp wire: research has proved that, in the gibbet before and after the length of the conditions of the unchanged, the gibbet part of the warp wire due to the opening of the elongation caused by the height of the gibbet and the square proportional to the gibbet. Thus, under the condition of allowing the sword belt to pass safely, should strive to reduce the height of the gibbet.

(2) Stranding symmetry on the elongation of the warp wire: when the upper and lower stranding symmetry, stranding height H and stranding length L a certain amount of time, the ratio of the length of the front and back of the mouth L1 and L₂, that is, the strand symmetry has a considerable effect on the elongation of the warp wire. When i=1, i.e., the length of the front part of the mouth is equal to the length of the back part of the mouth, the relative elongation of the warp wire is minimized. When the degree of symmetry i is within the range of 1.0 to 0.5, the deformation of the warp wire is not significant. However, the degree of symmetry continues to decrease, and when i is in the range of 0.5 to 0.1, the deformation of the warp wire will increase sharply.

(3) Effect of strand length on warp elongation

If the gib height and the symmetry before and after the gib remain unchanged, the relative elongation of the warp wires in the opening of the gib part is inversely proportional to the length of the gib. Therefore, in order to minimize the deformation and tension of the warp wires in the notches, a longer notch should be used on the weaving machine. In the loom to extend the gib is possible, but there is a certain limit, because the gib length of the front depending on the swing of the reed seat; increase the length of the back of the gib can be moved to the back of the beam, which is also subject to the limitations of the depth of the weaving machine, while the gib of the back of the length of the gib is too large will increase the friction area of the warp wires, so it must be comprehensively considered depending on.