摘要：塑料件被广泛应用于工业领域和日常生活之中，而随着人们对塑料件的外观、壁厚等要求越来越高，如何提高塑件质量、降低生产成本也变得日趋重要起来。本文以LCD上盖为研究对象，使用数值模拟分析的方法选择更合理的注塑模具的结构，优化成型工艺参数，进而进行注射模具的设计。首先对塑件进行工艺性分析，并选用合适的注塑机，对所选注射机进行校核；其次建立LCD上盖的有限元分析模型，在研究塑料熔体的充填和流动规律后，分析并确立浇注系统和冷却系统的结构；进而选择翘曲变形量为试验指标进行正交试验，优化熔体温度、保压压力、注射时间等成型工艺参数；最后，在此基础上进行模具的浇注系统、冷却系统、型芯型腔、脱模机构和导向机构等部分的设计，绘制出模具的二维图。

关键词：LCD上盖；注塑模具；模具设计；模流分析

Abstract：Plastic parts are widely used in industrial and daily life, and with the appearance of plastic parts, wall thickness and other requirements are getting higher and higher, how to improve the quality of plastic parts, reduce production costs have become increasingly important. In this paper, the LCD cover as the research object, the use of numerical simulation analysis method to choose a more reasonable injection mold structure, optimize the molding process parameters, and then the injection mold design. First, the plastic parts of the process analysis, and use the appropriate injection molding machine, the selected injection machine to check; Secondly, the establishment of the LCD cover of the finite element analysis model, in the study of plastic melt filling and flow law, The structure of the pouring system and the cooling system is established, and then the warping deformation is selected as the test index to carry out the orthogonal test, the melt temperature, the packing pressure and the injection time are optimized. Finally, the casting system, Cooling system, core cavity, stripping mechanism and guide mechanism and other parts of the design, drawing a two-dimensional map of the mold.

Keywords: LCD cover; injection mold; mold design; mold flow analysis

目录

第一章绪论 1

1.1研究背景 1

1.2薄壁注射成型简介 1

1.3薄壁注射成型国内外研究现状 2

1.4本文研究内容 3

第二章注塑成型工艺分析与模具结构形式的确定 5

2.1LCD上盖工艺性分析 5

2.1.1产品结构分析 5

2.1.2产品质量要求 5

2.1.3产品产量要求 5

2.1.4产品材料 5

2.2产品成型工艺方案的确定 6

2.2.1注塑机工艺参数的确定 6

2.2.2注塑机的选择与校核 6

第三章LCD上盖注射成型CAE分析及参数优化 8

3.1关于Moldflow软件 8

3.2有限元模型的建立 8

3.2.1几何模型的建立 8

3.2.2网格划分 8

3.2.3材料参数设置 9

3.2.4浇注系统的创建 10

3.2.5冷却系统的创建