It is also predicted that the orientation ratio responds to the die channel length, the channel area expanding ratio of die and plastics melt viscosity.
此外还预测了扩张机头流道长度，面积扩张比、塑料熔体粘度对取向度也有影响。
2
According the structure characteristics of oil filling pipe, combining production experience, designed expanding and necking die.
针对加油管的结构特点，结合企业生产经验，给出了连续扩。
3
Expanding and closing technique of core-die of longitudinal seam occlusion machine for automobile silencer and design calculation of such mechanics have been introduced.