液晶显示器前面板外壳设计 摘要 注射成型是热塑性塑料成型的主要方法之一，可以一次成型形状复杂的精密塑件。塑料模具的发展是随着塑料工业的发展而发展的。近年来，人们对各种设备和用品轻量化要求越来越高，这就为塑料制品提供了更为广阔的市常 本设计对“液晶显示器外壳前面板”进行研究和讨论，分析了其工艺特点，介绍其注射模具的工作过程，系统的阐述了液晶显示器前面板的注射模设计过程，并对模具的选材，模具的生产工艺也做了详细的介绍。本设计采用Pro/E的数值模拟技术和经验设计计算相结合的方法优化设计，仿真了塑料熔体在型腔内的充模流动以及冷却分析过程，合理的浇注系统和排溢系统，优化了工艺方案及工艺参数，降低了缺陷出现的可能性。利用参数化实体造型的方法，为更加高速、快捷的造型、生产提供了一种切实可行的办法。{0>设计中对注射模结构尺寸进行相关的计算，确定模具的最佳方案，并对主要零件结构设计进行相关的参数校核。 本设计方案结构紧凑，满足制品大批量生产、高精度、外形复杂的要求，设计参考了以往注射模具的设计经验，并结合制件性能，简化设计机构，并且运用AutoCAD、Pro/E等软件进行二维和三维绘图，缩短了生产周期，获得良好的经济性能。 关键词：液晶显示器前面板；塑料；塑料注射模；Pro/E的数值模拟 Abstract The i
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n 目录 引言………………………………………………………………………1 1概论…………………………………………………..………………2 1.1液晶显示器前面板设计总体方案…..…………………………………………………. 2 1.2研究背景……………………………….…………………………….………………2 1.3设计基本过程……………………………….…………………………….………………3 2塑料工艺规程的分析…………...…………………………………………..4 2.1注塑材料………………..…………………………………………………………………4 2.2塑件制件设计的工艺分析………………..………………………………………………6 2.2.1设计尺寸和精度的要求…………….………………………….………….……………6 2.2.2加强筋等防止变形的结构设计………….……...………………..……….………..…6 2.3塑件的体积和重量的计算……………………………………………………….6 3模具设计…………………………...…………………………………..7 3.1注射机的计算与选择………………………..……………………………………………7 3.1.1型腔数量的确定和校核……………………………………………………………….7 3.1.2注射量校核……………..…………………...……………………….….……………….8 3.1.3注射压力的校核………………………………………………………..………………8 3.1.4对于塑件按键投影面积校核……………………………………………………………9 3.1.5塑件在分型面上锁模力校核…………….…………………………………………….9 3.2分型面的设计…………………………………………………………………….……...10 3.3浇注系统设计……………………………………………………………………12 3.3.1主流道设计……………………………………………………………………………..12 3.3.2浇口设计………………………………………………………………………………..13 3.4排溢系统的设计……………………………………………………………….…...18 3.5成型零件工作尺寸的计算…………………………………………………..……...18 3.5.1型腔和型芯的计算………………………………………………………………20 3.6合模导向机构设计……………………………………………………………...22 3.6.1导向机构的作用………………………………………………………………22 3.6.2导柱导向机构设计………………………………………………………………22 3.7推出机构设计与计算…………………………………………………………………...23 3.8温度调节系统设计…………………………………………………………………..24 3.8.1模具温度调节的重要性………………………………………………………………24 3.8.2冷却系统的设计原则………………………………………………………………25 3.9注塑机各项行程校核…………………………………………………………………….25 3.9.1注塑机开模行程的校核…………………………………..……………………………25 3.9.2注塑机固定板及厚度的校核…………………………………………………………25 4模架设计………………………………………………………….…………26 5结论………………………………………………………………….………27 谢辞………………………………………………………...………………..28 参考文献……………………………………………………………...………..32 附录……………………………………………………...…………………..30