注塑模成型过程的模拟及优化

【作者】 路春；

【导师】 董丽华；

【作者基本信息】 上海海事大学 ， 机械设计及理论， 2005， 硕士

【摘要】 近年来,模具工业发展相当迅速,己成为国民经济中的重要基础工业之一。但是由于材料本身的特性以及复杂的加工条件,塑料注射成型过程加工过程相当复杂。长期以来,塑料注射成型过程的控制、模具设计与制造主要依赖工艺人员和设计人员的经验和技巧,设计合理与否、制品有无缺陷只有通过试模才知道,致使模具及塑料产品的设计与制造周期长、成本高。由于我国对高分子材料以及塑料加工成型技术研究的比较晚,与发达国家相比要落后几十年。 本文详细介绍了注射成型过程中制品的一些主要缺陷以及产生这些缺陷的原因,并针对各种缺陷提出了改善、解决的对策方法。 通过建立塑料注射成型过程的物理和数学模型,构造有效的计算方法,改进了注射成型充填过程数值模拟算法;研究了注射模浇口位置的优化设计方法,从而达到熔体平衡填充、减小塑件翘曲变形的目的。 此外,利用推导的理论,解决几个产品在实际生产中常见缺陷的问题,同时验证了理论的正确性。更多还原

【Abstract】 In recent years, Mould industry makes rapid progress and plays a important role in national economy development. However, the property of plastic material itself and the complexity of processing conditions make the process of the injection molding quite complicated. For a long time. The control of process of plastic injection molding and mold design and manufacture mainly depend on experience of designer and technique of the technologist. The rationality of design and the quality of product which can be seen after mold test. It brings about long design cycle and high manufacture cost. Because the time our country research macromolecule material and plastic processing is relatively late, we lag about years 20 than foreign in this field.This article introduces particularly the defect of product on the processing of plastic injection and the reason of causing those problems. Meanwhile, giving the ways to solve those defects.By establishing the physical and mathematical model of injection molding process and adopting effective numerical algorithm, optimizing simulated numerically algorithm on the process of plastic injection. The mean which optimizing the placement of plastic mold gate is discussed in the article, Aiming at that melt can reach the extremities of the cavity at the same time and reduce the warpage of the parts.Moreover, using the theory to resolve some problem in actual procession and validating the validity of the theory更多还原