The problems existed in extrusion process of two sorts large section hollow extrusion profilesare introduced. The concrete measure and extrusion consequence of the improved prothole die are given.

介绍了两种大断面的空心型材在挤压过程中存在的问题，阐述了改进挤压模具的具体措施和生产时的挤压结果.

Many factors affecting cell nucle ation and cell growth among the extrusion process such as preshaping pressure, melt temperature, melt viscosity, interfa cial tension,take-up speed and the te...

冷却水温等进行了全面分析,从而使微孔塑料的生产更趋合理化。