专业塑件成型翘曲分析

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1、撓曲剛性FlexuralRigidity1M=rEIWhere1/r:樑的曲率curvatureofthebeamM:彎曲力矩bendingmomentE:彈性模數modulusofelasticityI:斷面積對中立軸的慣性矩momentofinertiaofthecross-sectionalareawithrespecttotheneutralaxisEI:撓曲剛性flexuralrigidity各種一體成型的內鎖件能增加薄殼的剛性。Avarietyofmolded-ininterlockscanadds

2、tiffnesstothin-wallhousingdesigns.整合性收縮翹曲分析IntegratedShrinkageandWarpageAnalysis總收縮變形ProcessInducedShrinkageandWarpage(TotalShrinkageandWarpage)不均勻收縮non-uniformshrinkage不均衡冷卻unbalancedcooling不均勻收縮Non-UniformShrinkage檢查充填系統CheckFillingSystem模穴厚度和形狀、澆口數目和位置、流道

3、尺寸和配置以及融膠溫度、射壓和充填時間Cavitythickness&shape,gatenumber&location,runnersize&layoutandmelttemperature,pressure&filltime流長/壁厚比是否降低？Shallflowlength/thicknessratiosmaller?流動是否更平衡？Canflowbemorebalanced?壓力分佈(原始設計)Pressure(Original)·Maxentrancepressure:50.6MPa·Clampfor

4、ce:165.6ton翹曲變形結果(原始設計)Shrinkage&Warpage(Original)壓力分佈(修正設計)Pressure(Revised)·Maxentrancepressure:43.8MPa·Clampforce:111.6ton分析效益結論BenefitsSummary·找出變形的主要因素:不平衡冷卻或不均勻收縮è不均勻收縮·Findoutthemajorcauseofwarpage:unbalancedcoolingornon-uniformshrinkageènon-uniformsh

5、rinkage·增加澆口、縮短流長,以減少不均勻收縮è變形減少(5.1mm->1.4mm)·Addmoregatesandreduceflowlengthinordertoreduceshrinkagedifferenceèreducewarpage(5.1mm->1.4mm)不均衡冷卻UnbalancedCooling檢查冷卻系統CheckCoolingSystem冷卻孔道的尺寸、配置和串聯以及冷卻迴路的溫度和流率Size,layout&circuitingofchannelsandtemperature&f

6、lowrateofcoolant冷卻孔道是否均衡的配置在模穴的周圍?Arecoolingchannelserenlylaidoutaroundcavities?是否可以採用任何冷卻單元/裝置以消除熱點?Cananycoolingelements/devicesbeusedtoeliminatehotspots?冷卻液流動是否平衡?Shallthecoolantflowmorebalanced?錄影帶盒VideoTapeCassetteCase原始設計的收縮翹曲結果Shrinkage&WarpageResults

7、ofOriginalDesign•不均勻收縮•總•non-uniformshrinkage•process-induced原始設計的收縮翹曲結果Shrinkage&WarpageResultsofOriginalDesign•不均衡冷卻•總•unbalancedcooling•process-induced冷卻水道設計-公模部份CoolingChannelDesign-CoreSide•原始設計•修正設計•Original•Revised冷卻水道設計-母模部份CoolingChannelDesign-Cavit

8、ySide•原始設計•修正設計•Original•Revised錄影帶盒的收縮翹曲Shringkag&Warpage,VideoTapeCassetteCase•原始設計•修正設計•Original•Revised筆記型電腦Docking後蓋歐磊科技股份有限公司OLETechnologyCorporation前言在射出成形的過程中，由於塑料密度的改變，造成體積收縮。產品各處體積收縮的差