BASF_Design plastic guide

DesignSolutionsGuideHELPINGMAKEPRODUCTSBETTERTM!Notforcommercialuseofanykind!!Notforcommercialuseofanykind!!.................................................IOverview...................................................I–2BASFProductLine..........................................I–2Recycling..................................................I–3DesignAssistance...........................................I–3CAD/CAECapabilities........................................I–3Safety.....................................................I–3DesignConsiderationsforInjectionMoldedParts............IIPartingLines...............................................II–2DraftAngles................................................II–3WallThickness..............................................II–3FilletsandRadii.............................................II–3Bosses....................................................II–4Ribs.......................................................II–4Openings..................................................II–5Shrinkage..................................................II–5Gating.....................................................II–5Vents......................................................II–6PotentialKnitLines..........................................II–6StructuralDesign..........................................IIIStress.....................................................III–2Stress-Strain...............................................III–2NormalStress..............................................III–3ShearStress................................................III–3TorsionalStress.............................................III–4BendingStress.............................................III–5SectionPropertiesofVariousCross-Sections....................III–6ExplanationofVariables......................................III–6BeamSections.............................................III–6FormulasforCommonBeamsinBending.......................III–7FormulasforTorsionalDeformationandStress...................III–8I,TandLSections...........................................III–9FormulasforFlatPlates.......................................III–10FlatPlateEquations..........................................III–10PressureVessels............................................III–11ThermalExpansionandStress.................................III–12ImpactStresses.............................................III–13StressConcentrations........................................III–14RibDesign.................................................III–15DesignforEquivalentStiffness.................................III–18TableofContents!Notforcommercialuseofanykind!–2CoverCap.................................................IV–4Assembly.................................................VSnap-FitAssembly..........................................V–2Snap-FitDesign.............................................V–2Cantilevervs.Cylindrical......................................V–2TaperedCantilever..........................................V–2ShortCantileverDesign.......................................V–3NewFormulas..............................................V–4Snap-FitDesignExample.....................................V–4Press-FitAssembly..........................................V–5AdhesiveBonding...........................................V–6Bolts,Nuts,andMachineScrews..............................V–8Molded-inThreads..........................................V–9Self-TappingScrews.........................................V–10Inserts.....................................................V–11UltrasonicWelding...........................................V–12ShearJoint.................................................V–12EnergyDirector.............................................V–13VibrationWelding............................................V–14OtherAssemblyTechniques..................................V–15ThermoplasticStaking.......................................V–15SpinWelding...............................................V–15ElectromagneticWelding.....................................V–16PlasticMaterials...........................................VIClassificationofPlasticMaterials...............................VI–2MolecularWeightDistribution..................................VI–4PhysicalPro