论文部分内容阅读
详细分析了螺杆挤压过程中粉末／粘结剂混和料的相转变过程，即在挤压过程中实现喂料由固体变为熔体的熔融过程。采用实验观察总结基础上优化出的简化几何模型，建立了一种称为拖曳迁移过程的熔融机理。通过对这种喂料由固相到熔体的相转变过程的机理分析，推导出了极具代表性的单螺杆挤压机内喂料挤压输运的流变学基本方程——固体床分布函数Ｘ（Ｚ）的数学表达式。本文采用的简化几何模型再求解复杂物理问题的方法及其结果，对粉末挤压技术的研究和挤压工艺参数的制定具有指导意义和重要参考价值。
The phase transition process of powder / binder mixture in the process of screw extrusion is analyzed in detail, that is, the melting process of feeding material from solid to melt during the extrusion process. Based on the simplified geometric model optimized on the basis of experimental observations, a melting mechanism called drag-transfer process was established. Based on the mechanism analysis of phase transition from solid phase to melt, this paper deduced the most basic rheological equation of feed extrusion transport in single screw extruder - solid bed Mathematical expressions of distribution function X (Z). The simplified geometric model used in this paper and then the method of solving complex physical problems and their results are of guiding significance and important reference value for the study of powder extrusion technology and extrusion process parameters.