【作者】 李长勇；

【导师】 应济；

【作者基本信息】 浙江大学 ， 机械制造及其自动化， 2006， 硕士

【摘要】 注塑机模板是注塑机中的关键零件，用来固定模具，模板的性能很大程度上决定了塑料产品的质量；模板的重量占据注塑机70％以上，是注塑机主要的钢材消耗部件，模板重量减轻将降低企业的成本，模板质量的提高会提升产品的竞争力。因此，模扳的设计是注塑机生产企业迫切需要解决的问题。 但现有模板设计方法陈旧，主要凭借设计者的经验，或依据简化的计算公式，因此设计中往往采用非常大的安全系数来保证设计结构的安全性，这导致了现有模板过于笨重、巨大，往往存在应力集中、变形过大，甚至断裂等严重失效问题，模板性能得不到保证。因此，需要将科学的设计方法引入到模板设计中来。 针对这些问题，本论文对模板优化设计进行了研究： 1) 对注塑机模板的设计研究现状进行了调研，对结构有限元分析接触理论、拓扑优化理论、参数化优化理论进行了总结和研究。 2) 以HTF530型号注塑机前模板为研究对象，进行了三种方案的分析比较，并通过实验验证分析结果的正确性。对注塑机前模板和调模板进行顺序优化分析设计，设计出拓扑结构全新的、性能更强的创新型前模板和调模板。按照530型注塑机模板优化结构，构造并通过参数化优化软件设计出80～3600型号模板。 为了将优化设计后得到的创新性结构应用到所有的现有型号注塑机上，并且可以为海天公司快速设计出新型号注塑机的模板，开发了注塑机新型模板参数化设计CAD系统，以实现三维空间拓扑结构形状相类似，而尺寸不同的针对不同型号注塑机的创新型模板的快速建模，减少不同型号注塑机的模板设计的工作量，缩短产品开发周期和降低成本。围绕参数化设计软件开发，本文开展了以下研究工作： 1) 建立存储所有优化模型尺寸的数据库； 2) 进行了UG二次开发技术研究；建立了模板参数化模型、模板参数驱动机制； 3) 开发了注塑机新型模板的参数化设计软件。 本论文所依托的研究课题是浙江大学现代制造工程研究所与宁波海天集团股份有限公司的合作项目“注塑机智能化设计软件开发及其应用”的一部分，参数化设计软件已经交付海天公司使用，优化设计结果模板模型已经运用在海天公司新机器上，本课题于2005年11月底通过专家组鉴定，因此本文的研究成果已得到验证，创造了一定的经济效益。更多还原

【Abstract】 Mould boards are the primary parts of injection machines. Moulds are installed on mould boards, and the performance of mould boards affects the quality of plastic products very much. Mould board is main part to use steel on, and its weight is about 70% of injection machine. The weight reduction of mould boards will cut cost of company and the quality advance of them will enhance products’ competitive ability. So, Corporations of injection machines concern design of mould board.Present mould board design methods are outdated. The design of mould board depends on designer’s experience or is checked by simplified formula calculation. So big safety coefficient is used to ensure the structure ’s safety performance, and this results in havey and huge mould board structure. Often there are some problems in mould boards such as local stress concentration, too big deformation, and even structure fracture. And the performance of mould boards can’t be ensured. So it needs to introduce scientific design methods into mould board desgin process.Focusing on this aim, there were some research done below:1) Collected now mould board design research information, and summarized structure FEA (Finite element analysis) theories such as contact theory, topology optimization theroy and parametr optimization theroy.2) Selected HTF530 mould board as research object, did three different analysis and compared the analysis results. Did experiment to check the analysis result. Used sequential optimization design method to optimize front and rear mould boards, and got new topological strcuture and better performance front and rear mould boards. According to this innovative topological structure, constructed and parametrically optimized mould boards of HTF80 to HTF3600.In order to use innovative mould boards to injection machines, and to fast design new mould boards for Haitian Group, need to develop mould board parametric design CAD system which can fast construct 3-D models of different dimension mould boards of different injection machine, and all the mould boards have similar structure. This can reduce workload of designers, shorten product development period and cut product costs. Some works were done to develop the parametric design system:1) Established database to store all optimized models’ dimensions.2) Researched software development techniques based on UG, and established mould board parametric model and parametric drive mechanism.3) Developed mould board paratric design software.This research subject was a part of the cooperation project held by Institute of Manufacturing Engineering of Zhejiang University and Ningbo Haitian Group Co., Ltd. The mould board paratric design software is being used in Ningbo Haitian Group Co., Ltd. The innovative structures have been used to new injection machines. Experts group has authenticated this research subject in November 2005. So, the production has been validated and benefited the company.更多还原