鼠标模具设计.rar

鼠标模具设计

机械设计专业相关的毕业设计，里面有详细的图纸，ppt,说明书，外文翻译。


目录

摘要  ...........................................................2
Abstract  .......................................................3
第一章  绪论 ..................................................4
   1.1 塑料成型在工业生产中的重要性 ..............................4
   1.2 塑料模具的分类 ............................................7
   1.3 毕业设计应达到的要求 ......................................7
第二章  零件的工艺分析 .....................................8
   2.1 材料的选择 ................................................8
   2.2 产品工艺性与结构分析 ......................................10
第三章  模具结构设计 ........................................12
 3.1 型腔数量以及排列方式  .....................................12
 3.2 初选注塑机 ................................................13
   3.3 分型面的设计 ..............................................15
   3.4 浇注系统与排溢系统的设计 ..................................16
 3.5 成型零件的设计 ............................................19
 3.6 推出机构的设计 ............................................23
 3.7 侧向分型与抽芯机构的设计 ..................................24
 3.8 温度调节系统 ..............................................26
 3.9 注塑机参数的校核 ..........................................27
第四章  绘制装配图和零件图 ................................28
总结  .........................................................29
参考文献  ...................................................30

摘要

在一个注塑成型的过程中，影响散热性能的是各种填料（磁铁矿，重晶石，铜，滑石，玻璃纤维和锶铁氧体），调查在不同比例下对聚丙烯复合材料的冷却反应。在注塑成型时，热电偶在型腔模具表面的复合纪录气温。测量室温和高温时，从斜坡的冷却曲线和热扩散的复合来估计，热扩散系数是一个暂时性的数据。由于后压力，冷却曲线显示不同的合并路段，扩散的综合和扩散的聚丙烯基体。冷却的反应，就看异性热扩散的复合材料，其原因是该路的填充材料，其注射成型工艺和互联的灌装机粒子。热扩散表明，最高值为30％的滑石粉填充聚丙烯，在最短的冷却时间可以发现35％铜填充聚丙烯。系统性变化的热传递性能的复合材料，由于不同的填充材料和填充比例，使模过程优化，并定制热流性能。此外，较强的滑石粉填充聚丙烯通过异性热传递性质，使设计的复合材料比较预定的最高热流能力，以此来确定热传递的首选方向。

关键词：聚合物基复合材料 热学性能 注塑成型  颗粒灌装机

Abstract

The effects of thermal properties of various fillers(magnetite,barite,copper,talc,glass fibres andstrontium ferrite)in various proportionson the cooling behaviour of polypropylene matrix composites are investigated in an injection moulding process.A thermocouple in the cavity of the mould records the temperatures at the surface of the composite during injection moulding.From the slope of the cooling curves the thermal diffusivities of the composites are estimated and compared with thermal diffusivities at room temperature and elevated temperatures measured with a transient technique.The cooling curves show different merging sections affected by the after pressure,the diffusivity of the composite and the diffusivity of polypropylene matrix.The cooling behaviour depends on the anisotropic thermal diffusivity of the used composite,which is caused by the alignment of filler material due to the injection moulding process and the interconnectivity of the filler particles.The thermal diffusivity shows the highest value for 30%talc filled polypropylene,whereas the shortest cooling time was found for 35%copper filled polypropylene.The knowledge of the systematic variation of thermal transport properties of composites due to different filler material and filler proportions allows to optimize the mould process and to customize the heat flow properties.Furthermore,the strongly anisotropic thermal transport properties of talc filled polypropylene allow the design of composites with a predefined maximum heat flow capability to transport heat in a preferred direction