摘要近几年好多国家都在发展机械行业，与机械相关的各个行业都越来越重视CAD/CAM技术，如今CAD/CAM技术已发展成为一项比较成熟的共性技术，我国家电工业的高速发展对模具工业，尤其是塑料模具提出了越来越高的要求,国内塑料模具市场以注塑模具需求量最大，其中发展重点为工程塑料模具。同时还因为塑料制品及模具的3D设计与成型过程中3D分析正在塑料模具工业中发挥越来越重要的作用。在本次毕业设计中，通过运用三维实体造型高端软件UG对“衬筒”外形进行3D造型，同时也设计了其塑料注塑模的3D模型；还根据所设计的模具尺寸选择安装了相应的模架，最终生成了直观的结构设计图；此外还利用CAD绘制了模具装配图以及各种成型零件图。关键词：CAD/CAM；塑料；模具；UGAbstractAlotofcountriesinthedevelopmentofmachineryindustryinrecentyears,everyindustrypaymoreandmoreattentiontorelatedtomechanicalCAD/CAMtechnology,CAD/CAMtechnologyhasnowdevelopedintoarelativelymaturetechnology,withtherapiddevelopmentofourcountryhomeaPElianceindustryofmoldindustry,putsforwardhigherandhigherrequirements,especiallyplasticmould,in2004,asaproportionoftheplasticmoldinthemoldindustryhasrisento30%,accordingtoexpertspredictthatinthenextfewyears,Chinaplasticmouldindustrywillcontinuetomaintainanannualgrowthrateofmorethan10%ofthehighspeedofdevelopment.Domesticdemandininjectionmoldplasticmoldmarketisthelargest,thekeyforengineeringplasticmolddevelopment.Alsobecauseoftheplasticproductsandmould3ddesignandmoldingprocessof3danalysisistheplasticmoldindustryplaysamoreandmoreimportantrole.Inthisgraduationdesign,thehigh-endsoftwareUGthree-dimensionalentitymodelisusedtoshapeof"ttypemountingbracket"3dmodeling,anddesignthe3dmodeloftheplasticinjectionmold;Alsoaccordingtothedesignofthemouldsizechoosetoinstallthecorrespondingmoldframe,theresultingintuitivestructuredesign;InadditiontouseCADdrawthemoldassemblydrawingaswellasavarietyofmoldingpartdrawing.Keywords:CAD/CAM;plastics;mold;UG目录TOC\o"1-3"\h\uHYPERLINK\l_Toc18404目录PAGEREF_Toc18404IIHYPERLINK\l_Toc6656第一章绪论PAGEREF_Toc66561HYPERLINK\l_Toc5154第二章产品材料4HYPERLINK\l_Toc240742.1成型产品材料4HYPERLINK\l_Toc313262.2注塑模具材料4HYPERLINK\l_Toc3694第三章成型工艺分析6HYPERLINK\l_Toc208733.1衬筒零件图7HYPERLINK\l_Toc69163.2塑件的工艺性分析7HYPERLINK\l_Toc51533.3塑料材料的基本特性7HYPERLINK\l_Toc159473.3.1材料成型特性7HYPERLINK\l_Toc319313.3.2塑件材料成型性能8HYPERLINK\l_Toc210733.3.3尺寸精度分析8