各种塑料材料注塑工艺(快速调机型)（various plastic materials injection molding process (rapid adjustment)）

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1、各种塑料材料注塑工艺(快速调机型)（Variousplasticmaterialsinjectionmoldingprocess(rapidadjustment)）I.rawmaterialtemperature01.ABS180-24002.HIPS180-22003.PC+ABS200-24504.PA66260-30005.PA66+GP285-32006.PMMA200-24507.PC280-32008.PS180-22009.POM165-20010.PP180-22011.PBT220-280Two,thetreatmentofeachexc

2、eption:A:airstreak1.gatelocation:A.toimprovemoldtemperature;B.toincreasethepipetemperature;C.reducesthegatelocationoffire,shootingpressure;Forlongerandfinernozzleproducts,wecanusesplitprocessing,onewithmediumspeedandmediumpressurenozzle,andthetwosegmentwithslowlowpressurejetpositi

3、onB:missingmaterial1.whenthemissingmaterialisformed,firstchecktheproductdoseenoughA.whenthethicknessoftheboneismissing,themoldtemperatureistoohighandtheexhaustisbadMethods:1.lowermouldtemperature2.atlowerpressurerate.B.whenthepositionoftheboneisthin,theplasticflowvelocityisnotfast

4、enoughtoformMethods:1.improvethebarreltemperatureof2.toimprovetheinjectionpressurerateoffire.C.whentheproductislackofpackingpositionMethods:1.improvedexhaust2.shotalowrateoffire2.whentheproductintheproductionhasthemissingmaterialformationA.firstcheckswhetherthenozzleleaksglueorblo

5、cks;B.materialpipetemperatureisabnormal;DoesthemoldtemperaturechangeinC.?C.materialflower1.seeifthetemperatureisnormal;2.toseewhetherthetubetemperatureisabnormal,whetherthepipetemperatureistoohigh,leadingtothedecompositionofrubber;The3.nozzleapertureistoosmall,whentheinjectionrubb

6、ermaterialdecompositioninhighspeedunderthecondition.(retreatbarrelviewblockiscottonybubbleinjection).2.whentheirregularflowerappearonthesurfaceoftheproduct,processingrubberwhentheproductappearsonthesurfaceofaregularsmallflower,inthecompoundwithoutcheckconfirmedabnormalconditions,a

7、vailablemachineimprovement,findouttheflowersectiondosepositionatlowerpressureandimprovetheexhaustspeedimprovedPCinjectionpressure:usehighinjectionpressureasmuchaspossible.PPinjectionpressure:canbeaslargeas1800barWhatiscrystallineplastics?Crystallineplasticshaveaclearmeltingpointan

8、dareregularlyarrangedinsolids.The