LNP_Injection_Molding_Processing_Guide_(1)

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1、LNP*SpecialtyCompoundsInjectionmoldingprocessingguide2SABICInnovativePlasticsContentsContentsInjectionmoldingtrouble-shootingguide4Partdesign5•Designprocess•DesignforinjectionmoldingMolddesign7•Materialsofconstruction•Aguidetotoolsurfaceenhancements•Sprues,runners,a

2、ndgatesMachineconsiderations12•BasicdesignfeaturesInjectionmoldingprocedure15•Materialhandlingandpreparation•Machinepreparation•Moldreleaseagents•RecommendedpurgematerialsforLNPcompounds•ShutdownprocedureProcessing/design19•Thermocomp*•ThermocompHSG•Verton*andStat-K

3、on*•Lubricomp*andLubriloy*•EMI-X*,Faradex*andStat-Loy*Advancedmoldingtechniques23•Gas-assistmolding(GAM)•Injectioncompressionmolding(ICM)•Thinwallinjectionmolding•Structuralfoammolding(SFM)Technicalbulletins24•Regrind•Moldcooling•Doingitrightdrying•Tolerances•Unders

4、tandingthermoplasticpartwarpageLNP*productlineoverview34SABICInnovativePlastics3InjectionmoldingtroubleshootingguideforLNP*engineeringcompoundsProblemCauseRemedyBrittlenessWetmaterial•ReviewdryingprocedureOverheating•Reducebarrel/nozzletemperatureMolded-in-stresses•

5、Increasebarrel/nozzletemperaturePoorpartdesign•EliminatesharpcornersWeld-lines•Increaseinjectionpressure•IncreasemelttemperatureWarpedpartsParttemperaturedifferential•CheckmoldcoolingsystemExcessiveshrinkage•IncreasepartpackingOrientationofmaterial•Changegatelocatio

6、nPoorpartdesign•AddribsorpartthicknesstoimprovestiffnessEjectionproblem•Checkforuniformwallthickness•Increasecoolingtime•Reducemoldtemperature•IncreaseejectorpinareaFlashingInadequateclamptonnage•UsealargermachineHighInjectionPressure•ReduceinjectionpressureMisalign

7、edplaten•AlignplatenExcessiveventdepth•ReviewmoldventingBurnmarksAirtrappedincavity•ImprovemoldventingBarrelornozzleoverheating•CheckheatercontrolsShearheat•ReduceinjectionspeedContamination•Purgebarrel•CleanhopperdryerHang-upinmoldingmachine•RemoveandcleanscrewWeak

8、weld-linesInsufficientventing•ImprovecavityventingInjectionspeedormoldtemperaturetoolow•IncreaseinjectionrateandtooltemperatureIncorrectga