显而易见，只讨论熔体输送而不讨论物料熔融，对全面研究双螺杆挤出理论是很不够的。
It is obviously that only taking account of melt handling without considering material melting is not suitable to study twin screw extrusion theory thoroughly.
温度降低时，熔体黏度大，机头压力增加，挤出制品压的较密实，形状稳定性好。
The head pressure increases when the melt viscosity and temperature decreases, so the products will have good shape and favorable stability.
分析了聚合物熔体于口型挤出流动中粘度的压力效应。
The pressure effect of viscosity for polymer melts during die extrusion flow was analyzed.
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