第51卷,第6期2023年6月工程塑料应用Vol.51,No.6Jun.2023ENGINEERINGPLASTICSAPPLICATION基于Moldflow的按钮开关帽注塑模具设计刘祥建,周佳睿,姜劲(金陵科技学院机电工程学院,南京211169)摘要:针对某种塑料按钮开关帽带有环形侧凹且帽体壁厚变化不均匀的结构特点,设计了一套带斜导柱侧抽芯机构的一模两腔模具。为改善塑件质量及解决塑件脱模问题,首先,结合Moldflow软件仿真确定了浇口位置和冷却系统,并对塑件的成型过程进行仿真分析,结果显示,塑料熔体充满型腔的时间短且两型腔的充型一致性好,同时,塑件的体积收缩率小且两型腔内的塑件体积变化均匀,型腔内气体的排出情况较好,气穴少,塑件产生的翘曲变形量在合理变形范围之内。其次,对模具结构进行设计,主要包括分型面、成型零件以及侧抽芯机构。由于塑件带有环形侧凹,型芯设计成组合式结构,并由大型芯、滑块和成型杆成型塑件的帽体部分,采用斜导柱侧抽芯机构实现塑件环形侧凹的成型并脱模。通过Moldflow软件分析和优化模具设计方案,可以加快模具的设计过程,提高塑件的成型质量。关键词:按钮开关帽;注塑模具;浇口位置;成型过程中图分类号:TQ320.5+2文献标识码:A文章编号:1001-3539(2023)06-0097-06DesignofInjectionMouldforButtonSwitchCapBasedonMoldflowLiuXiangjian,ZhouJiarui,JiangJin(SchoolofMechanicalandElectricalEngineering,JinlingInstituteofTechnology,Nanjing211169,China)Abstract:Inviewofthestructuralcharacteristicsofaplasticbuttonswitchcapwithanannularsideconcaveandunevenwallthicknesschangeofthecapbody,asetoftwocavitymouldwithaanglepinsidecorepullingmechanismwasdesigned.Inordertoimprovethequalityofplasticpartandsolvetheproblemofdemouldingplasticpart,firstly,thegatelocationandcoolingsystemweredeterminedthroughsimulationusingMoldflowsoftware,andthemoldingprocessoftheplasticpartwassimulatedandanalyzed.Theresultsshowthatthetimefortheplasticmelttofillthemouldcavityisshort,andthefillingconsistencyofthetwomouldcavitiesisgood.Atthesametime,thevolumeshrinkageoftheplasticpartissmall,thevolumeoftheplasticpartinthetwomouldcavitieschangesuniformly,thegasdischargeinthemouldcavityisgood,andtherearefeweraircavitations.Theamountofwarpagedeformationoftheplasticpartiswit...