【作者】 张喆；

【导师】 王国峰；

【作者基本信息】 哈尔滨工业大学 ， 材料工程， 2014， 硕士

【摘要】 随着我国塑料行业发展迅速，塑料产品的应用也正在逐步扩大，已广泛应用于工业、医疗等各行业领域。精度高、结构与形状复杂、优越的使用性能是产品未来发展的方向。当前，注塑产品占塑料产品比例的一半以上，应用较广，但诸如产品充填不足、困气、熔接痕、翘曲变形等成型缺陷对产品质量的影响，仍是企业实际生产所面临需要解决的问题。同时，由于中国劳动力成本总体在不断地上升，导致塑件产品的生产周期和总体成本控制是企业越来越关心的热点。当前，大部分企业的工程技术人员仍依靠其工作经验和采用多次试模的方法来保证产品的质量。一旦遇上新产品模具的开发时，很多问题就难以考虑全面，不得不需要通过大量的试模来发现和解决问题。如何缩短塑件的成型制造周期，避免或降低塑件成型缺陷的出现率是工程技术人员研究的重点问题。利用计算机辅助工程分析技术（简称CAE技术），可以让设计者进行仿真以研究产品成型，进一步改良或最佳化设计。它可协助设计变更，协助排除困难，累积知识经验，建立设计准则。该技术可以预先判断产品在注塑成型过程中出现的质量缺陷，对多种设计方案和工艺方案进行模拟仿真与优化，为后续实际生产服务，可缩短模具开发时间，增强产品成型工艺的稳定性、节省材料，并提高产品生产效率和质量。本文以某型号电器塑料零件作为研究对象，由于零件形状较复杂，壁厚较薄并且不均匀，使塑料原材料充模的流动性变差，给零件成形造成很大困难，为了解决实际生产中遇到的问题，利用Moldflow模拟分析软件对前期试模产品成型缺陷进行分析，查找原因，提出改进措施，进一步优化注塑工艺，节约调机时间以及降低注塑工程师对经验的依赖，保证产品质量，达到客户需求。通过采用Moldflow模拟分析法与Doe实验设计法相结合，对解决产品质量缺陷问题、优化注塑成型工艺参数等起着指导作用。在实验研究中，可有效对比数值模拟与实际试模生产结果，验证其准确性和可行性。通过实验研究发现，此方法可以降低工程设计人员对经验的依赖，帮助快速建立数据库，方便操作设计。因此，数值模拟与优化的研究对塑料产品的成型、注射模设计和实际批量生产都具有很重要的意义。更多还原

【Abstract】 With the rapid development of China’s plastics industry, and gradually expand theapplication fields of plastic products, plastic products have been widely used in variousfields of industrial, electronic, medical, and people’s daily life, and toward the complexstructure, high precision, using the superior performance direction. Currently, injectionmolding products accounted for more than half the proportion of plastic products, usedwidely, but the lack of such product filling, trapped gas, affect weld marks, warpagemolding defects on product quality, the actual production is still faced by enterprisesneed to be addressed problems. Also, due to the overall rise in labor costs in Chinacontinue, leading to the production cycle of plastic products and overall cost controlcompanies are increasingly concerned about the hot spots. Currently, most enterprisesstill rely on its engineering and technical personnel working experience and the use ofmultiple tryout way to ensure the quality of the product. Once the case of new productdevelopment of mold, many problems would be difficult to consider fully, had the needto identify and solve problems through a lot of test mode. How to shorten themanufacturing cycle molding of plastic parts, plastic parts to avoid or reduce theoccurrence rate are key issues shaping defects research engineering and technicalpersonnel.The use of computer-aided engineering analysis (CAE technology for short) thatallows the designer to study the molding simulation to further improve or optimize thedesign. It can help design changes to help overcome all difficulties, the cumulativeknowledge and experience, establish design criteria. The technology can be pre-judgethe quality of defective products appear in the injection molding process, a variety ofdesign and technology programs simulation and optimization services for thesubsequent actual production, the mold can be shortened development time, enhance thestability of the product molding process, material savings, and improve productionefficiency and product quality.In this paper, a model for the study of electrical plastic parts, Because parts ofcomplex shape, thickness thin and uneven filling of the plastic raw material liquiditydeteriorated, causing great difficulties to the parts forming, in order to solve practicalproblems encountered in the production, use Moldflow simulation software for pre-trialmold molding defects are analyzed to find the cause, suggest improvements, and furtheroptimize the injection molding process, saving time and reducing injection conditionersrely on the experience of engineers to ensure product quality, meet customer needs.Through research methods and process simulation experiment combining the elimination of plastic molding defects, optimize the molding process and molding cycleprogram plays a guiding role. During the analysis, but also effectively verify theaccuracy and feasibility of numerical simulation and the actual tryout productionbetween the establishment of the design basis. Through research and analysis, not onlycan reduce the reliance on experienced designers to reduce blindness and can also helpdesigners to quickly create a database used for injection molding (enterprisestandard).So the research aspects of injection molding simulation, optimization ofplastic products, injection mold design and actual production are of very importantsignificance.更多还原