台扇电机前塑料罩注塑模具设计毕业设计.doc

学号毕业设计论文题目台扇电机前塑料罩注塑模具设计作者届别2009届系别机械与电气工程系指导教师李凯旋专业机械设计制造及其自动化职称高级工程师完成时间2009年4月湖南理工学院毕业设计（论文）I摘要本文讨论了台扇电机外表前塑料罩注塑模具设计模设计过程。介绍了注塑模成型工艺和注塑模具的结构及工作原理。台扇电机外表前塑料罩采用的是塑料ABS，热塑性塑料的主要成型工艺是注射成型，因此，台扇电机外表前塑料罩成型方法采用浇注成型。本设计对台扇电机外表前塑料罩结构进行了工艺分析，确定了分型面、浇注系统等，选择了浇注机，计算了成型零部件的尺寸。确定了模具浇口、限位装置、顶出机构和导柱导套，这样设计出的结构可确保模具工作可靠和灵活。最后对注射机进行选择和校核。用AUTOCAD绘制了一套模具装配图和零件图。通过本次设计对浇注模具有了更深的认识，了解浇注模具结构及工作原理。关键词ABS塑料注塑模分型面浇注系统注射机成型零件。湖南理工学院毕业设计（论文）IIABSTRACTThisarticlediscussedtheinjectionmoldstructureofthefomerplasticcoverofthedeskfanmotor,andintroducedinjectionmouldingprocess,thestructureofthecinjectionmoldandworkingprinciple.ThefomerplasticcoverofthedeskfanmotorismadeofABSplastic,whosemouldingprocessmostlyisinjectionmoulding,thereforeusingthecastingmoulding.Thesructureofthefomerplasticcoverhasbeenanalysised.Thepartingsurfaceandthecastingsystemhasbeendetermined.Thecastingmachinghasbeenselectedandthesizeoftheformingpartshavebeencalculated.Usingthesidegate,theintroductionagenciesasynchronous,guidedcolumnoriented,lateralobliquederivativetypecolumnwiththepumpcore.Thisstructurecanbedesignedtoensurereliableandflexiblemolds.Finally,injectionmachinehasbeenselectedandchecked.AmoldassemblydrawingsandpartsdiagramweredrawedwithAUTOCAD.ThroughthisdesignIgotadeeperunderstandingwiththestuctureandworkprincipleofthecastingmoldKeywordsABSplasticinjectionmoldsurfacecastingsysteminjectionmachinemoldingparts湖南理工学院毕业设计（论文）III目录摘要...............................................................................IABSTRACT............................................................................II1前言...............................................................................11.1模具工业在国民经济中的地位...................................................11.2注塑模具在国外的发展状况.....................................................21.3注射模具在国内的发展状况.....................................................22注塑件的设计.......................................................................32.1材料选择.....................................................................32.2功能设计.....................................................................42.3结构设计.....................................................................42.3.1塑件结构图.............................................................52.3.2壁厚...................................................................52.3.3圆角...................................................................52.3.4脱模斜度...............................................................62.4塑件的尺寸精度及表面质量.....................................................62.4.1尺寸精度...............................................................62.4.2塑件的表面质量.........................................................73注塑成型的准备.....................................................................73.1注塑成型工艺简介.............................................................73.2注塑成型工艺条件.............................................................83.3注塑机的选择................................................................103.3.1注塑机基本参数........................................................103.3.2选择注塑机............................................................113.4注射机的校核................................................................123.4.1注射压力的校核........................................................123.4.2锁模力的校核..........................................................123.4.3开模行程与推出机构的校核..............................................123.4.4安装部分相关尺寸的校核................................................133.4.5模具外形尺寸校核......................................................133.4.6模具总厚度与注射机模板闭合厚度的关系..................................134模具设计..........................................................................134.1塑料配方说明................................................................134.2模具材料的选择..............................................................144.3分型面的确定................................................................144.5浇注系统设计................................................................154.5.1主流道................................................................164.5.2浇口的设计............................................................164.5.3分流道的设计..........................................................174.6成型零件工作尺寸的计算......................................................174.6.1型芯径向尺寸计算.....................................................17