摘要
音响壳体注塑件结构复杂,内部含有多个加强筋、凸台、圆柱孔等;前后侧开有4个方孔,左右侧开有与开模方向大于90°的斜齿形卡扣结构等多种细节特征。开模时,为不损坏塑件左右侧的斜齿形卡扣,卡扣侧型芯需要以比推杆快的速度斜上运动,因此采用凸轮齿轮、齿条斜上抽芯机构实现快速斜上脱模动作。通过分析塑件的结构工艺性,确定一模一腔、双分型面的注塑模具设计。同时,基于模流分析软件Moldflow进行最佳浇口位置选择、充填分析以及翘曲分析。生产结果表明,所设计的模具结构合理,动作可靠,提高了生产效率,达到了生产要求。
Acoustic shell injection molded parts have complex structure,including a number of stiffeners,lugs,cylindrical holes inside it and etc.There are four square holes in the front and back.There are two oblique tooth buckles in the left and right,and the angle between it and pulling direction is more than 90 degree.In order not to damage the oblique buckles,the side core of the buckle needs to move up obliquely at a faster speed than the push rod.This paper uses cam gear and rack to pull the side core fast and obliquely.By analyzing the structure and manufacturability of plastic parts,the design of injection mold with one cavity and double parting surfaces is determined.Besides,the best gate location,filling analysis and warpage analysis are carried out based on the software Moldflow.The production results show that this mould is reasonable in structure,reliable in action,and improves the production efficiency,also satisfy the production requirements.
作者
曹艳丽
范希营
李赛
黄海跃
CAO Yanli;FAN Xiying;LI Sai;HUANG Haiyue(School of Mechanical and Elactrical Enginering,Jiangsu Normal University,Xuzhou 221116,CHN)
出处
《制造技术与机床》
北大核心
2020年第1期70-75,共6页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金资助项目(51475220)
徐州市科技计划资助项目(KC18239)
江苏省普通高校研究生科研创新计划培育项目
关键词
注塑模具
快速斜上抽芯机构
斜齿形卡扣
模流分析
injection mold
fast core pulling mechanism
oblique tooth buckles
Modflow analysis
