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    Introduction to plastic modified granulator

    Introduction to plastic modified granulator

    • Categories:Industry News
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    • Time of issue:2020-07-17 16:31
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    (Summary description)1.Thebasicstructureoftheplasticmodifiedgranulator:1.Twin-screwmainengine2.Waterstretchhead3.Conveyorbelt4.Pelletizer5.Silo??2.Basicintroductionofplasticmodifiedgranulatoroftwinscrewgranulator:???Thetwin-screwgranulatorhasagoodplasticizingeffectonthematerialthroughtheshearingcombinationofmanyscrewblocks,andcanbesuitableforvariousmaterialsbychangingthecombinationofscrewelements.

    Introduction to plastic modified granulator

    (Summary description)1.Thebasicstructureoftheplasticmodifiedgranulator:1.Twin-screwmainengine2.Waterstretchhead3.Conveyorbelt4.Pelletizer5.Silo??2.Basicintroductionofplasticmodifiedgranulatoroftwinscrewgranulator:???Thetwin-screwgranulatorhasagoodplasticizingeffectonthematerialthroughtheshearingcombinationofmanyscrewblocks,andcanbesuitableforvariousmaterialsbychangingthecombinationofscrewelements.

    • Categories:Industry News
    • Author:
    • Origin:
    • Time of issue:2020-07-17 16:31
    • Views:
    Information
    1. The basic structure of the plastic modified granulator: 1. Twin-screw main engine 2. Water stretch head 3. Conveyor belt 4. Pelletizer 5. Silo
     
     
    2. Basic introduction of plastic modified granulator of twin screw granulator:
          The twin-screw granulator has a good plasticizing effect on the material through the shearing combination of many screw blocks, and can be suitable for various materials by changing the combination of screw elements.

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    About the structure process analysis of twin screw extruder

    About the structure process analysis of twin screw extruder

    Next,theeditorofJuliwillgiveyouabriefintroductionaboutthestructureandprocessanalysisofthetwin-screwextruder:??1.Plasticizingarea??Theplasticizingzoneistoheattheinjectedresintoformamoltenstate.Theconditionssuchastheheatingtemperatureandtimeinthisregionarenotparticularlylimitedaslongasthefluoropolymerhavingaspecificunstableterminalgroupisinamoltenstate.Inthelatterhalfoftheplasticizationzone,itispreferabletoprovidedevolatilizationholestoremoveatleastapartofvolatilecomponentsundernormalpressureorreducedpressure.Then,thepartialpressureofvolatilecomponentsinthestabilizationregiondescribedlatercanbereduced,andthestabilizationtreatmentcanbeeffectivelypromoted.??2.Stabilizationtreatmentarea??ThestabilizationzoneistomeltandkneadandconvertspecificunstableendgroupsintoaCF2H.Thestabilizationtreatmentareaispreferablyformedbyusingakneadingdiscwithoutpropulsion.Here,melt-kneadingiscarriedoutinthepresenceofwaterandoxygen.Itcandirectlyintroducepurewater,ionexchangewater,etc.orwatervapor;itcanalsobeaccompaniedbythefluoropolymertobetreated.Theamountofwateraddedisthesameasthenumberofunstableterminalgroups,butitisactuallypreferabletosupplyanexcessamount,forexample,atleast10timestheamount.Thepressureinthestabilizationzoneisgenerallycontrolledat0.2~10MPa,andthesettemperatureiscontrolledat280~430℃.Thetimetomaintainpressurizationisusuallylessthan10minutes.??Accordingtotheprincipleoftheextrudertoremoveunstableendgroups,themelt-kneadinginthestabilizationzoneispreferablycarriedoutinthepresenceofoxygeninadditiontothepresenceofwater.Airisusuallyusedintermsofeconomy.Inthepresenceofoxygen,thecarbongeneratedbythemoltenkneadedproductisalsoburned,whichcaninhibitthecoloringofthefluoropolymer.Oxygenisaninertgastotheunstableterminalgroupscarboxylandfluorinatedacylgroups.Duringtheprocessofmeltingandkneading,itcanimprovethedevolatilizationefficiencyofvolatilecomponents.??Three,devolatilizationarea??Thedevolatilizationzoneremoveshigh-temperaturevolatilecomponentsgeneratedbythedecompositionofspecificunstableterminalgroups.Theabsolutepressurevariesaccordingtothemoltenstateofthemoltenkneadedproductandtheoperatingconditionsofthescrewofthekneader.Generally,thepressureisreducedtothepointwherethemoltenkneadedproductdoesnotintrudeintotheexhaustnozzle.Itcanbe0.01to0.1MPa,andthetemperatureiscontrolledat25O~Claughataround.??Inthepresenceofacertainamountofwaterandoxygen,FEPextrudingthroughatwin-screwextrudercaneffectivelyremovetheunstableterminalgroupsofFEP.SimplifiestheprocessingprocessofFEPunstableendgroupsandsavesproductioncosts.Whentheobtainedstabilizedpolymerismelt-formed,nobubblesorvoidsaregeneratedinthefinishedproduct,anditisnotcolored.?Formoreinformationabouttwinscrewextruders,pleasevisithttp://www.njjl.com/
    發布時間 : 2020-07-30 點擊 : 0

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