摘要塑料作为一种可塑性很好的合成高分子材料已广泛应用于电脑、手机、汽车、家电、和玩具产品制造中，塑料模的发展具有着广阔的市场空间。本次设计的制件为玩具马主动齿轮，具有重量轻，强度高，易清洁的特点，为大批量生产产品。本文基于塑料成型的基本原理，特别是单分型面注射模具的工作原理，利用计算机辅助设计制造的基本方法，完成了主动齿轮的注射模设计。本套模具采用一模四腔、点浇口进料的一模两开三板式结构。同时通过对塑件进行结构工艺分析，本文还进行了模具分型面、型腔数目、浇口形式的确定，以及脱模机构，合模导向机构，冷却系统、成型零件等模具主要组成部分的设计。并用CAD绘制完整的模具装配图和主要零件的零件图。关键词：塑料注射模主动齿轮AbstractAsthesyntheticpolymermaterialswithgoodplasticity,plastichasbeenwidelyusedincomputers,mobilephones,automobiles,homeappliances,andtoysproductsmanufacturing,whichsuggeststhatthedevelopmentofplasticmoldbearsabroadmarketspace.Thedesignedpartsofthistimearetoyhorseactivegears,withthecharacteristicsoflightweight,highstrength,easytoclean,asmassproductionproducts.Basedonthebasicprinciplesofplasticmolding,especiallytheworkingprinciplesoftheinjectionmouldwithsinglepartingsurface,thispapercompletesthedesignofinjectionmouldoftheactivegears,usingthebasicmethodsofdesigningandmanufacturingwithcomputers’assistance.Thesetofmouldsadoptsthestructureofamoldwithfourcavitiesandamoldoftwo-openandthree-platewithafeedpointgatemodel.Meanwhilethroughthestructuralprocessanalysisoftheplasticparts,thispaperalsopointstofixthemoldpartingsurface,thenumberofcavity,theformoftherunneranddesignthemajorcomponentsofmoldslikethedemoldingmechanism,thewholemoldsteeringmechanism,coolingsystemandthereadymoldedparts.AndthecompletemoldassemblinggraphandthemainpartsgrapharedrawnthroughtheuseofCAD.Keywords:plastic;injectionmold;activegear目录1概述.....................................................................11.1全球塑料工业发展现状.................................................11.1.1各国产业形貌....................................................11.1.2各国优劣势分析..................................................11.2我国模具工业发展现状.................................................21.3我国模具设计今后的发展方向...........................................32塑料制件的工艺性分析及材料选择...........................................52.1成型塑料制件结构工艺性分析...........................................52.2制件材料的选择.......................................................53模具结构设计与计算.......................................................73.1型腔数目的配置与确定.................................................73.2分型面的确定.........................................................83.3注塑机的选择.........................................................83.4浇注系统设计.........................................................93.4.1主流道的设计....................................................93.4.2分流道的设计...................................................113.4.3冷料穴和拉料杆的设计...........................................123.4.4浇口的选择.....................................................123.4.5浇口的位置.....................................................133.5成型零部件的设计....................................................143.5.1成型零件的结构设计.............................................143.5.2成型零件的钢材选用.............................................153.5.3定...
