国外手机结构设计资料

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1、CheilIndustriesInc.DesignGuideforThinWallProductDesignGuideForThinWallProductsDesignConceptMaterialselectionGoalLowweightMinimumSizeThinwallReductionofCycletimeOptimumDesignHighProductivitySavingMaterialProcessingtechnologyCheilIndustriesInc.R&D,Applic

2、ationDevelopmentCenter2LastUpdatedDEC071999DesignGuideForThinWallProductsMaterialselectionRequirementThickThinHighFlowLengthResinFlowlength:SpiralFlow(L/T)100:1~150:1>200:1HighImpactStrengthNotchIzodImpactTest,LowTemperatureImpactTestGoodAppearanceLowG

3、loss,UVResistance:deltaE1~2NeatengineeringPlastics:FlexuralModulus-2,000MPaStiffnessReinforcedplastics:FlexuralModulus-3,500~14,000MPaHeatResistanceULRelativeThermalIndex(RTI):70~95oCMechanicalIntegrityDesignforassembly:Snapfit,SmallScrew,UltrasonicWel

4、dingFlameResistanceMobilePhone:ULHB,PortablePC:UL94V-0~V-1CheilIndustriesInc.R&D,ApplicationDevelopmentCenter3LastUpdatedDEC071999DesignGuideForThinWallProductsShrinkageAmorphousvs.semi-crystallineSpecificvolume(cm(semi-crystallinepolymer)(amorphouspol

5、ymer)3/g)TgTmTemperature(oC)CheilIndustriesInc.R&D,ApplicationDevelopmentCenter4LastUpdatedDEC071999DesignGuideForThinWallProductsShrinkageNeatplasticmaterialstendtoshrinkmorealongthedirectionofflowGateOrientationeffectsMoldshrinkageofReinforcedmateria

6、lsisrestrictedalongthedirectionoffiberorientationCheilIndustriesInc.R&D,ApplicationDevelopmentCenter5LastUpdatedDEC071999DesignGuideForThinWallProductsMechanicalIntegrityReinforcedPlasticsLarger&thickwallpart2.0mmMechanicalIntegrity1.2mmSmaller&Thinwal

7、lpartOptimumpartdesign-optimizepartgeometryAdvancedAssembly-useproperassemblytechniqueCheilIndustriesInc.R&D,ApplicationDevelopmentCenter6LastUpdatedDEC071999DesignGuideForThinWallProductsRibs2.0mm1.2mmW<0.6TW0.25od>0.5oWallThicknessofRib,Boss,Guss

8、etinthinwallpartmaybesameaspartthicknessbecauseoflowpossibilityofsinkorvoid.GuidelinesforRibdimensions:Componentswallthickness:TDraftperside(d):0.5o~1.5oRibheight(H):lessthan5T(typically2.5T~3T)Ribspacing(oncenter):morethan(2T~3T)Basera