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About the correct way to switch colors and materials for double screw extruders

About the correct way to switch colors and materials for double screw extruders

  • Categories:Industry News
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  • Time of issue:2020-07-17 15:26
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(Summary description)Below,theeditorofJuliwillgiveyouabriefintroductionaboutthecorrectmethodofswitchingcolorsandmaterialsforthedoublescrewextruder:1.Thebatchofproductsshouldcorrespondtothesizeofthemachine.2.Writetheproceduresforcleaningordisassemblingeachproduct.Thishelpsoperatorsplantimeandeliminatestheirdisputesabouthowmuchmaterialwillbeproduced.3.Helptheoperatortoplacecleanoperatingtoolsaroundtheextruder.Ifthematerialischangedfrequently,buildaworkbencharoundtheextrudertoprepareeverythingneeded.4.Studytheflowofrawmaterialsandfinishedproductsintoandoutoftheoperationsite.Itisarrangedsothattheoperatorspendslessenergyonthemobiletransportation.5.Removetherequirementsforthecleanlinessofthemachineforthenextproduct.6.Ifpossible,scheduleproductionintheorderofreducingcleaningmachines.Thismeansgoingfromlighttodark.Onthecontrary,youhavetodisassemblethemachinemultipletimes.

About the correct way to switch colors and materials for double screw extruders

(Summary description)Below,theeditorofJuliwillgiveyouabriefintroductionaboutthecorrectmethodofswitchingcolorsandmaterialsforthedoublescrewextruder:1.Thebatchofproductsshouldcorrespondtothesizeofthemachine.2.Writetheproceduresforcleaningordisassemblingeachproduct.Thishelpsoperatorsplantimeandeliminatestheirdisputesabouthowmuchmaterialwillbeproduced.3.Helptheoperatortoplacecleanoperatingtoolsaroundtheextruder.Ifthematerialischangedfrequently,buildaworkbencharoundtheextrudertoprepareeverythingneeded.4.Studytheflowofrawmaterialsandfinishedproductsintoandoutoftheoperationsite.Itisarrangedsothattheoperatorspendslessenergyonthemobiletransportation.5.Removetherequirementsforthecleanlinessofthemachineforthenextproduct.6.Ifpossible,scheduleproductionintheorderofreducingcleaningmachines.Thismeansgoingfromlighttodark.Onthecontrary,youhavetodisassemblethemachinemultipletimes.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-07-17 15:26
  • Views:
Information
Below, the editor of Juli will give you a brief introduction about the correct method of switching colors and materials for the double screw extruder:
1. The batch of products should correspond to the size of the machine.
2. Write the procedures for cleaning or disassembling each product. This helps operators plan time and eliminates their disputes about how much material will be produced.
3. Help the operator to place clean operating tools around the extruder. If the material is changed frequently, build a workbench around the extruder to prepare everything needed.
4. Study the flow of raw materials and finished products into and out of the operation site. It is arranged so that the operator spends less energy on the mobile transportation.
5. Remove the requirements for the cleanliness of the machine for the next product.
6. If possible, schedule production in the order of reducing cleaning machines. This means going from light to dark. On the contrary, you have to disassemble the machine multiple times.

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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/
发布时间 : 2020-07-30 点击 : 0

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