① extrusion screw defects.
② extrusion machinery in the various bite and gear wear is different, resulting in a regular dislocation and friction.
③ extrusion machinery in power equipment, such as the motor rotor shaking offset, transmission belt slipping, bite and not compact.
④ the cooling water tank near the head of the circulating water tap pressure is not uniform (such as the tank by the shock, high-power fan, so that the water up and down shaking).
⑤ traction tension instability, traction wheel is not round, or flat, or the central axis offset.
1, whether the inner conductor bending. Blank silk amplification 8% MM, before the first traction plus a drawing die. (This situation mainly occurs in the conductor itself is not uniform, in addition to this also consider the uniformity of insulation is the diameter of the stability of the uniformity of foam material, then there is the case of foam insulation is injured!
2, pay-line tension is uniform. Adjust the retractable line tension.
400-500M on the peak can be considered whether the overall insulation is cyclical uneven!
1 \ Cyclical wheels. 2 \ traction instability \ 3 conductor bent 4 stomata. Vertical hole can be caused, the most taboo structure is uneven, will impedance uneven, once the cyclical changes, necessarily SRL
The wheel diameter is 133 / bead frequency / 3.14 * 1000mm