文档名:回油盖隧道式二次抽芯机构注塑模设计
摘要:为解决塑件局部区域复杂特征的脱模困难问题,在注塑模具设计时首先采用局部特征分区域办法将局部难脱模特征集中分离出来,而后依据脱模方向的分布情况再进行同向集成分类,针对各集成后的脱模方向设计单次或多次抽芯机构,即脱模方向集成分类脱模设计法,从而有效地解决塑件脱模方向众多而导致的塑件整件或局部区域脱模设计困难问题.基于上述设计原理,结合润滑盒回油盖塑件的脱模设计困难问题,创新设计了一种隧道式二次抽芯机构.在该机构中,利用一根斜导柱驱动主成型块内的隧道滑块转向驱动主成型块内的另一成型活动块先完成第一次抽芯,此过程中主滑块与主成型块分离,而主成型块维持不动;然后该斜导柱再继续驱动主滑块带动主成型块完成第二次抽芯来实现塑件局部区域的脱模.结合机构运动力学分析,在该机构的结构设计中,主滑块与主成型块的闭合锁紧由楔紧块两侧不同斜角的斜面进行锁紧,其斜角分别为23°和25°,相应地,主滑块的斜导柱斜角取20°,用此参数设计的两次抽芯机构顺利地克服了塑件局部区域脱模机构设计困难难题,应用于塑件模具上,较好地实现了塑件的自动化注塑生产.塑件的模具结构为一种单点点浇口三板模具,一模一腔布局.
Abstract:Inordertosolvetheproblemofdifficultdemouldingofcomplexlocalfeaturesinplasticparts,theareasegmenta-tionmethodoflocalfeaturewasfirstusedininjectionmoulddesigntoseparatethelocaldifficultdemouldingmodelsfromthefeatureset.Then,basedonthedistributionofdemouldingdirections,thesamedirectionintegratedclassificationmethodwasusedtodesignsingleormultiplecore-pullingmechanismsforeachintegrateddemouldingdirection,justas"demoldingdirectionintegratedclassificationdemoldingdesignmethod",effectivelysolvingtheproblemofdifficultdemouldingdesignofplasticpartsasawholeorinlocalareascausedbymultipledemouldingdirections.Basedontheabovedesignprinciplesandcombinedwiththedifficultyofdemouldingthelubricating-boxoilreturncoverplasticpart,atunnel-two-stage-core-pullingmechanismwasinnovativelydesigned.Inthemechanism,ananglepinwasusedtodrivethetunnel-sliderinsidethemainformedblocktoturnanddriveanothermoveableblockinsidethemainformedblockforcompletingthefirstcorepulling.Duringthisprocess,themain-body-sliderseparatedfromthemainformedblock,whilethemainformedblockremainedstationary.Thentheanglepincontinuedtodrivethemain-body-slidertodrivethemainformedblocktocompletethesecondcore-pullingforachievingthedemouldingofthelocalareaoftheplasticpart.Basedontheanalysisofmechanismkinematics,inthestructuraldesignofthemechanism,theclosedlockingofthemain-body-sliderandthemainformedblockwascarriedoutbytheangleplanesonbothsidesofthewedgeblockwithdifferentanglesof23°and25°,respectively.Correspondingly,theanglepinofthemain-body-sliderhadanangleof20°.Thetunnel-two-stage-core-pullingmechanismdesignedwiththisparameterhassuccessfullyovercomethedesigndifficultiesofthedemouldingmechanisminthelocalareaoftheplasticpart,andisappliedtotheplasticpartmould,effectivelyrealizingtheautomatedinjectionmoldingproductionoftheplasticpart.Themouldstructureoftheplasticpartisathree-plate-mouldwithasinglepointgate,thelayoutisone-mouldwithone-cavity.
作者:毛江峰 盛国栋Author:MAOJiangfeng SHENGGuodong
作者单位:浙江工业职业技术学院,浙江绍兴312000
刊名:工程塑料应用 ISTICPKU
Journal:EngineeringPlasticsApplication
年,卷(期):2024, 52(6)
分类号:TG243
关键词:润滑盒回油盖 机构创新设计 二次抽芯 隧道滑块 模具结构
Keywords:lubricating-boxoilreturncover mechanisminnovationdesign secondarycore-pulling tunnel-slider mouldstructure
机标分类号:TQ320.66TP391.72TG241
在线出版日期:2024年7月22日
基金项目:回油盖隧道式二次抽芯机构注塑模设计[
期刊论文] 工程塑料应用--2024, 52(6)毛江峰 盛国栋为解决塑件局部区域复杂特征的脱模困难问题,在注塑模具设计时首先采用局部特征分区域办法将局部难脱模特征集中分离出来,而后依据脱模方向的分布情况再进行同向集成分类,针对各集成后的脱模方向设计单次或多次抽芯机构...参考文献和引证文献
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回油盖隧道式二次抽芯机构注塑模设计 Design of injection mould with a tunnel-two-stage-core-pulling mechanism for oil return cover
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