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                                Changzhou Sujin Polymer Technology Co., Ltd.
                            
    
                        
    
                    
    
                
    
                
      
                                                            
    • Categories:Engineering case
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    • Time of issue:2020-07-31 10:07
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                    (Summary description)
                
    
                
            
    
            
                        
    
                
    
                    
     
                                                                                                                                                                                                                                                
    
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    Changzhou Sujin Polymer Technology Co., Ltd.
    
                                            
    Changzhou Sujin Polymer Technology Co., Ltd.
    
                                        
    
                                    
    
                                
    
                                                                        
    
                    
                    
    
                        
                    
    
                    
    
                        
                    
    
                    
    
                
    
                
    
                    
    
                                                                                                                
    
                                    
    
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                                Changzhou Sujin Polymer Technology Co., Ltd.
                            
    
                        
    
                    
    
                
    
                
                
    
                    (Summary description)
                
    
                
      
                                                            
    • Categories:Engineering case
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    • Time of issue:2020-07-31 10:07
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	Changzhou Sujin Polymer Technology Co., Ltd. In 2007, our company and Changzhou Sujin Polymer Co., Ltd. successfully reached the first phase of equipment supply agreement, including five SHJ75 twin-screw extruders; in 2010, it successfully reached the second phase of batch production. The equipment supply agreement includes ten series of twin-screw extrusion lines such as SHJ75B and SHJ75D.
    

    
                        
                        
    
                
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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 
                    
    
                    
                
    
                
                
        
    
                        
    
          
            
                
                
    
                    	 What are the technical parameters of a single screw extruder
	                
    
                
                
                
    
                    
                    
    What are the technical parameters of a single screw extruder
    
                    
                    
                    
    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)
    
                    
                    
                    
    
                        發布時間 : 2020-07-30
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                    	 Two more effective cleaning agents for starting the double screw extruder
	                
    
                
                
                
    
                    
                    
    Two more effective cleaning agents for starting the double screw extruder
    
                    
                    
                    
    Next,Iwillgiveyouabriefintroductiontotwomoreeffectivecleaningagentsforstartingthedoublescrewextruder:????1.Mixture:50%HDPE+50%diatomaceousearth????2.Mixture:HDPE+water+decontaminationpowder.TheHDPEisfedintothescrewattheusualspeedatthemeltingtemperature.Stirthedecontaminationpowderwithwaterinabuckettoformaslurry,andslowlyaddtheslurryfromthemainfeedport.Theseslurriesimpact,rub,andcleanthescrewduetofoaming.????Formoreinformationabouttwinscrewextruders,pleasevisithttp://www.njjl.com/
    
                    
                    
                    
    
                        發布時間 : 2020-07-30
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