To receive extrudedproduct with high quality, it is necessary to know the arrangement of the velocity profile at the outlet of die.
为了获得高质量的挤压制品，对模具出口区域速度分布的研究是必须的。
2
Through analyzing the properties of PVC extruded materials, the main factors causing the colouration of PVC extrudedproduct were investigated.
通过对PVC挤塑材料性能的分析，探讨了影响PVC挤塑制品着色的主要因素；
3
Strictly controlling the material formula, mixing process and extrusion processing process were the main routes to control the colour of PVC extrudedproduct.