Injection Molding Guideline——注塑成型指南【中英文对照】

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1、InjectionMoldingGuideline——注塑成型指南【中英文对照】InjectionMoldingGuideline1.PlasticMaterialAssumethegeneralpurposegradeplasticmaterialstobeusedforourmoldingIncaseofspecialgradematerials,pleaselistthematerialgrade&brandonourtoolplanAlltheplasticmaterialsformoldingmustbesameasthematerialsduringdevelopments

2、tage.Incaseofmaterialshortageorcostissue,thenewsourcedmaterialshallbetestedandconfirmedacceptableprioruse.2.ColorantAllthecolorantmustbeconformedtoheavyelementsdirectivesforbothASTMF963&EN71.Mostofthedrypigmentsarehygroscopic;theymustbeproperlysealedafteruse.Forthecomponentswithhighcolorconsiste

3、nce,themasterbatchesorpre-colorplasticmaterialsarerequired.3.RegrindMaterialRatioForplasticmaterialonstructuralcomponents,noregrindisallowedForgeneralpurposematerialonnonstructuralcomponents,20%maximumrunnerregrindcanbeblendedwithvirginmaterial.Forthosetranslucentortruewhitecolorcomponents,noreg

4、rindisallowed.Forshortglassfilledmaterials,15%maximumregrindcanbeblendedwithvirginmaterialForlongglassfilledmaterials,noregrindisallowed.Themaximumnumberofregrindpassesforgeneralpurposematerialsshallbe3.Only1timeofregrindpassisallowedforshortglassreinforcedmaterialsTheregrindratioshallbeshownino

5、urupdatedtoolplantofollow.Theregrindratioandno.ofregrindpasseshastobevalidatedandconfirmedduringdevelopmentstage.Ifnot,noregrindwillbeallowed.Burnedordiscoloredspruesorpartsmustnotbeusedasregrind.Hotnozzle&hotrunnerisourpreferencetoeliminaterunnerscrap.4.MaterialDryingMostplasticresinsrequiretho

6、roughdryingpriorinjectionmoldingtoassuremaximumpropertiesinthemoldedparts.Belowtablepleasefindtherecommendeddryingtemperature&durationforreference:Forthosehygroscopicmaterials,thedehumidifyinghopperdryerwithclosed-loopaircirculatingsystemisrequiredtoensureacceptablemoisturecontenttobeachieveddur

7、ingmolding.Forthosenon-hygroscopicmaterials,theregrindhavetobedriedas80ºCfor2hourstopreventsurfaceblemishesduetovolatiles,suchasPE,PP,POM,HIPS.MaterialDryingTemperatureTimerequired(Hour)DehumidifyingDryerrequiredABS/C-ABS80º