【作者】 孙战里；

【导师】 尹延国；

【作者基本信息】 合肥工业大学 ， 机械电子工程， 2003， 硕士

【摘要】 随着塑料门窗在我国的发展，对塑料异型材质量的要求越来越高。挤出模是异型材挤出生产过程中的关键部件之一。国内外挤出模质量存在着较大差距，主要原因是设计技术的差距。 相对于型材主体来说，功能块结构比较复杂，准确成型较困难。功能块结构设计的好坏，影响到整个挤出模的准确成型。目前很少有人对功能块进行研究，因此，本论文选择功能块的结构设计作为研究对象。 本论文对于功能块的研究，是以聚合物熔体的流变学理论，以及挤出模头流道的基本要求为基础。分析了国内外不同厂家功能块结构的异同点，总结出功能块结构的特点。在此基础上，结合长期的模具设计经验，提出功能块的设计原则和方法。并利用最新的模具测绘数据，进行验证和改进。利用FLOW2000软件分别从挤出模整体上和单独对功能块进行研究，并对上述设计原则和方法进行校正和补充。对前面的研究成果，运用VBA进行编程，初步实现了功能块结构的计算机辅助设计，提高了设计效率，减轻了设计人员的劳动量。更多还原

【Abstract】 With the development of plastic door-window industry, more high quality of plastic profiles is required. Die is one of the critical parts in profile extrusion procedure. There is a gap of die quality to some extent between home and abroad mainly because of the differences in design technology.Functional block structure is more complicated than the main profile and more difficult to be formed into the needed profile. Therefore, whether the structure design of functional blocks is good or not affects the right profile shape. Very few studies on functional block structure were reported, consequently, the structure design of functional blocks was selected as the research object in this paper.In this paper research of functional block structure was based on the theory of rheology of the polymer melt and the basic requirement of extrusion die channel. Various functional block structures of different factories home and abroad were analyzed and the structure characterizations of functional blocks were also summarized. Based on the former work and our rich experience in die design, the strategies and methods of structure design of functional blocks were developed in this paper. Combining with the structure dimensions measured from the newest die, the strategies and methods were checked and improved . The functional blocks were studied separately at the whole profile and individually by using the soft FLOW2000, and the developed strategies and methods were improved and supplemented. According to the research results, a program was compiled to realize the computer aided design of functional block structure by VBA language, which improves design efficiency and relieve the designer.更多还原