【摘要】 对非等温包覆机头胶料流场挤出均匀性进行研究。结果表明：非等温包覆机头胶料流场压力、温度和流动速度的模拟变化趋势与实际相似，模拟试验是分析包覆机头胶料流场的一种有效方法；确定了影响胶料包覆均匀性的包覆机头流道参数（进料口位置、进料口直径和芯线牵引速度）的相关变化规律，为包覆工艺及包覆机头流道参数的合理选择提供了理论依据；确定了包覆过程中芯线牵引速度与进料口胶料流量匹配性的评价方法。该研究为包覆工艺及包覆机头流道参数的确定提供了理论指导。更多还原

【Abstract】 The extrusion uniformity of the compound flow field in the non-isothermal cladding head was studied. The results showed that the simulated variation trends of the pressure,temperature and flow velocity of the compound flow field in the non-isothermal cladding head were similar to those of the actual situation,and the simulation test was an effective method to analyze the compound flow field of the cladding head. The effects of the flow channel parameters in the cladding head(feed inlet position,feed inlet diameter and core wire traction speed) which affected the cladding uniformity were determined,which provided a theoretical basis for the optimization of the cladding process and the flow channel parameters of the cladding head.Moreover,the evaluation method of the matching between the core wire traction speed and the compound flow at the feed inlet during the cladding process was established. This study provided theoretical guidance for the determination of the cladding process and the flow channel parameters of the cladding head.更多还原