Nanjing Juli Chemical Machinery Co., Ltd. - Extruder (Single Screw Extruder, Double Screw Extruder

2020-07

Beijing Haier Kehua Engineering Plastics Co., Ltd.

 2020-07--31

BeijingHaierKehuaEngineeringPlasticsCo.,Ltd.?Atthebeginningof2008,ourcompanyhaswonthetrustofBeijingHaierChemicalCo.,Ltd.withitshigh-qualityequipmentandsincereserviceattitude,andhasestablishedalong-termfriendlyandstablebusinessrelationshipwithit.Sofar,ourcompanyhasprovidedninecompaniesTwin-screwextrusionproductionline,modelsareSHJ35,SHJ55,SHJ65,SHJ75,etc.Andwithitspersistenthighqualityandexcellentservice,itishonoredtobeassessedbyBeijingHaierChemicalCo.,Ltd.asa"QualifiedSupplierinMainlandChina".Itisanxiousforcustomersandsolvesproblemsforcustomersinthefirsttime.Ourcompanywillpersistinimplementingit.,Toservethemajorityofuserswithamorecourteousandhigh-qualityindustryattitude.

31

2020-07

Changzhou Sujin Polymer Technology Co., Ltd.

 2020-07--31

31

2020-07

Jiangsu Hongyi Biochemical Technology Co., Ltd.

 2020-07--31

30

2020-07

About the structure process analysis of twin screw extruder

 2020-07--30

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/

30

2020-07

What are the technical parameters of a single screw extruder

 2020-07--30

Next,theeditorofJuliwillgiveyouabriefintroductionaboutthetechnicalparametersofthesinglescrewextruder??1.Screwdiameter:referstothediameteroftheoutercircleofthescrew,representedbyD,andtheunitismillimeter(mm).2.Screwlength-to-diameterratio:referstotheratioofthelengthLoftheworkingpartofthescrew(thelengthofthethreadedpart,thatis,thelengthfromthecenterlineofthefeedingporttotheendofthescrew)andthescrewdiameterD,expressedbyL/D.3.Rangeofscrewrotationspeed:referstothemaximumrotationspeedofthescrewtotheminimumrotationspeedofthescrew;nrepresentsthescrewrotationspeed,andtheunitisrevolutionsperminute(r/min).HuahongAnswer4.Powerofthedrivingmotorofthemainscrew:ExpressedbyP,theunitiskilowatt(kW).5.Heatingpowerofextruderbarrel:ExpressedbyE,theunitiskilowatt(kV).6.Theproductioncapacityoftheextruder:expressedbyQ,theunitiskilogramperhour(kg/h).7.Theheightofthecenteroftheextruder:referstothedistancefromthecenterlineofthescrewtotheground,expressedbyH,andtheunitismillimeter(mm).8.Externaldimensionsoftheextruder:referstothetotallength×totalwidth×totalheight,expressedbyL×W×H,andtheunitismillimetersormeters(mmorm)9.Extruderquality:expressedbyW,theunitiskilogramorton(kgort)

Zhejiang Tianhe Ecological Technology Co., Ltd.

Beijing Haier Kehua Engineering Plastics Co., Ltd.

Changzhou Sujin Polymer Technology Co., Ltd.

Jiangsu Hongyi Biochemical Technology Co., Ltd.

About the structure process analysis of twin screw extruder

What are the technical parameters of a single screw extruder