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英文原文INJECTIONMOLDINGMACHINEINJECTIONMOLDINGMACHINEISPLASTICMACHINEFORSHORTITUSESTHETHERMALPHYSICALPROPERTIESOFPLASTICS,THEMATERIALFROMTHEHOPPERINTOTHEBARREL,ISBARRELEDBYHEATINGCOILHEAT,SOTHEMATERIALWILLBEMELTED,WHICHISARRANGEDBYTHEEXTERNALFORCEUNDERTHEACTIONOFTHEMOTORDRIVINGTHEROTATIONOFTHESCREWINTHEBARRELTHEMATERIALINTHESCREWUNDERTHEACTIONOFTHESCREWGROOVE,ALONGTHEFORWARDDELIVERYANDCOMPACTION,DUALROLETHEMATERIALINTHEHEATINGANDSHEARUNDERGRADUALLYPLASTICIZING,MELTEDANDHOMOGENIZED,WHENTHESCREWROTATES,THEMATERIALINTHESCREWCHANNELFRICTIONANDSHEARFORCE,THEMOLTENMATERIALISPUSHEDTOTHESCREWHEADATTHESAMETIME,THESCREWWITHBACKWARDINTHEMATERIAL,THESCREWHEADFORMINGMATERIALSTORAGESPACE,COMPLETINGTHEPLASTICIZINGPROCESS,THEN,SCREWINTHEINJECTIONCYLINDERPISTONTHRUSTUNDERTHEACTIONOFHIGHSPEED,HIGHPRESSURE,INTHEMATERIALSTORAGECHAMBER,THEMELTTHROUGHTHENOZZLETOTHEMOLDCAVITYINJECTION,CAVITYMELTAFTERPRESSING,COOLING,SOLIDIFICATION,MOLDINTHEMOLDCLOSINGMECHANISMOFACTIONNEXT,OPENMOLD,ANDTHROUGHTHEEJECTIONDEVICETOFINALIZETHEDESIGNGOODPRODUCTSFALLFROMTHETOPDIECONFIGURATIONACCORDINGTOTHECLAMPINGMEMBERANDTHEINJECTIONCOMPONENTTYPEHASHORIZONTAL,VERTICAL,ANGLETYPETHREE1HORIZONTALINJECTIONMOLDINGMACHINEHORIZONTALINJECTIONMOLDINGMACHINEISTHEMOSTCOMMONTYPEITSCHARACTERISTICISTHECENTERLINEINJECTIONASSEMBLYANDCLAMPINGASSEMBLYCENTERLINEOFCONCENTRICORCONSISTENT,ALSOWITHTHEPARALLELTOTHEMOUNTINGSURFACEITHASTHEADVANTAGESOFLOWCENTEROFGRAVITY,STEADYWORK,MOLDINSTALLATION,OPERATIONANDREPAIR,WHICHARECONVENIENT,THEMOLDOPENINGBIG,SMALLOCCUPIEDSPACEHEIGHT;BUTCOVERSANAREAOFLARGE2VERTICALINJECTIONMOLDINGMACHINEITSCHARACTERISTICISCLAMPINGDEVICEANDINJECTIONDEVICEOFTHEAXISLINEARRANGEMENTANDPERPENDICULARTOTHEGROUNDITALSOHASTHEADVANTAGESOFSMALLOCCUPIEDAREA,CONVENIENTASSEMBLYANDDISASSEMBLYOFINSERTMOLD,EASYINSTALLATION,SINCETHEBUCKETINTOTHEMATERIALPLASTICIZATIONISEVENLY,EASYTOREALIZEAUTOMATIONANDMACHINEAUTOMATIONLINEMANAGEMENTTHEDISADVANTAGEOFITISTHETOPPRODUCTISNOTEASYTOFALLOFFAUTOMATICALLY,ITOFTENNEEDSMANUALOROTHERMETHODTOTAKEOUT,ANDISNOTEASYTOREALIZEFULLAUTOMATICOPERATIONANDLARGEPRODUCTSINJECTION;MACHINEHEIGHT,FEEDING,INCONVENIENTREPAIR3ANGLETYPEINJECTIONMOLDINGMACHINEINJECTIONDEVICEANDAMOLDINGDEVICEAXISAREARRANGEDVERTICALLYACCORDINGTOTHEINJECTIONASSEMBLYCENTERLINESAREVERTICAL,HORIZONTALANDRELATIVEPOSITIONOFTHEVERTICALANDHORIZONTALINSTALLATION,RECUMBENTPOINTS①HORIZONTALVERTICAL,INJECTIONASSEMBLYLINEANDPLANEPARALLEL,ANDMOLDASSEMBLYCENTERLINEANDTHEBASEOFVERTICALANDHORIZONTAL,VERTICAL;INJECTIONASSEMBLYCENTERLINEANDTHESURFACEVERTICAL,ANDDIEASSEMBLYCENTERLINEANDTHEREFERENCESURFACETHEADVANTAGESOFANGLETYPEINJECTIONMACHINEHASTHEADVANTAGESOFBOTHHORIZONTALANDVERTICALINJECTIONMOLDINGMACHINE,SPECIALAPPLYTOTHEMOLDOPENINGSIDEGATEASYMMETRICGEOMETRYPRODUCTSATPRESENT,THEINJECTIONDEVICEARECOMMONCYLINDERFORMANDDOUBLECYLINDERFORM,IPLANTTHEINJECTIONMOLDINGMACHINEISDOUBLECYLINDERFORM,ANDISDIRECTLYDRIVENBYAHYDRAULICMOTOROFSCREWININJECTIONMOLDINGBECAUSEOFDIFFERENTMANUFACTURERS,DIFFERENTTYPESOFMACHINECOMPONENTSARENOTTHESAME;THEFOLLOWINGWILLMAKEACONCRETEANALYSISOFOURFACTORYWITHMACHINETHEWORKINGPRINCIPLEISTHEPLASTIC,SCREWINPLASTICPARTSINTHEDRIVETHEMAINSHAFTTOROTATETHROUGHTHEHYDRAULICMOTOR,SPINDLEENDISCONNECTEDWITHTHESCREW,ANDTHEOTHERENDOFTHEHYDRAULICMOTORKEYCONNECTION,SCREWROTATION,PLASTICITYANDMELTCLASSIFIEDPUSHEDTOTHESTORAGECHAMBERCYLINDERFRONT,ATTHESAMETIME,SCREWBACKINTHEREACTIONMATERIAL,ANDTHROUGHTHETHRUSTBEARINGTHETHRUSTSEATBACK,PULLINGTHEPISTONRODTHROUGHTHENUTSTRAIGHTBACKTOCOMPLETETHEMEASUREMENT,INJECTION,THEINJECTIONCYLINDERRODCHAMBEROILINLETTHROUGHTHEBEARINGTOPUSHTHEPISTONRODTOCOMPLETETHEACTION,THERODCHAMBERPISTONOILINLETTOPUSHTHEPISTONRODANDSCREWANDFINISHTHEINJECTIONTHEWORKPRINCIPLEOFSCREWPLASTICIZINGCOMPONENTSPERFORMS,SCREWROTATION,FROMTHEMATERIALINLETINTOTHESCREWGROOVEMATERIALADVANCINGCONTINUOUSLYFORWARD,HEATINGRINGTHROUGHTHEBARRELWALLOFTHEHEATTRANSFERTOTHESPIRALGROOVEMATERIAL,SOLIDMATERIALINTHEDUALROLEOFEXTERNALHEATINGANDSCREWROTATIONALSHEAR,ANDTHROUGHTHETHERMALPROCESSFUNCTIONALSECTIONOFSCREW,ACHIEVINGTHEPLASTICIZINGANDMELTING,MELTINGAWAYTHECHECKRINGAROUNDTHESCREWHEAD,FRONTENDTHROUGHTHECHANNELINTOTHESCREW,ANDGENERATESBACKPRESSURE,PUSHTHESCREWAFTERTHESHIFTMEASUREMENTCOMPLETEMELT,ATTHETIMEOFINJECTIONSCREWUP,PISTONEFFECT,WITHRAPIDADVANCEMENT,INTHECYLINDER,WILLMELTRESERVOIRMATERIALINTHECHAMBERTHROUGHTHENOZZLEINTOTHEMOLDSCREWPLASTICIZINGCOMPONENTSGENERALLYHAVETHEFOLLOWINGCHARACTERISTICSTHESCREWHASTWOFUNCTIONSOFPLASTICIZINGANDINJECTION;THESCREWINPLASTIC,ONLYFORTHEPLASTICTHEPLASTICSINPLASTICIZINGPROCESS,THERMALPROCESSTHROUGHTHANEXTRUSION;THESCREWONTHEPLASTICIZINGANDINJECTIONWERETOOCCUR,AXIALDISPLACEMENT,ANDSCREWINWORKINGSTATEOFINTERMITTENTWHENTOSTOP,THUSFORMINGANONSTABILITYOFSCREWPLASTICIZINGPROCESS1SCREWSCREWISAKEYCOMPONENTOFPLASTICPARTS,DIRECTCONTACTWITHPLASTIC,PLASTICTHROUGHTHEEFFECTIVELENGTHOFTHESCREWCHANNEL,AFTERTHEHEATFORALONGTIME,MUSTGOTHROUGH3STATESGLASS,BEHAVIOR,VISCOUSSTATETRANSFORMATION,GEOMETRICPARAMETERS,GEOMETRY,LENGTHOFFUNCTIONALSECTIONOFSCREWWILLDIRECTLYAFFECTTHETRANSMISSIONEFFICIENCYANDTHEPLASTICIZINGQUALITYOFPLASTIC,WILLULTIMATELYAFFECTTHEQUALITYOFINJECTIONMOLDINGCYCLEANDPRODUCTCOMPAREDWITHTHEEXTRUSIONSCREW,PLASTICSCREWHASTHEFOLLOWINGCHARACTERISTICSTHEINJECTIONSCREWLENGTHDIAMETERRATIOANDCOMPRESSIONRATIOISSMALL;SCREWGROOVEOFINJECTIONSCREWISSECTIONOFTHEDEEP;THEINJECTIONSCREWSFEEDINGSECTIONSISLONGER,ANDARESHORT;THEINJECTIONSCREWWORK,PLASTICIZINGCAPACITYANDMELTTEMPERATUREWILLVARYWITHTHEAXIALDISPLACEMENTSCREWANDCHANGEICLASSIFICATION,SCREWINJECTIONSCREWACCORDINGTOTHEPLASTICADAPTABILITY,CANBEDIVIDEDINTOGENERALANDSPECIALSCREW,GENERALALSOCALLEDCONVENTIONALSCREW,CANBEPROCESSEDWITHLOWVISCOSITY,MOSTOFTHETHERMOPLASTIC,CIVILPLASTICCRYSTALLINEANDAMORPHOUSANDENGINEERINGPLASTICS,ISTHEMOSTBASICFORMOFTHESCREW,ANDTHECORRESPONDINGANDSPECIALSCREW,ISUSEDTOPROCESSWITHORDINARYSCREWPROCESSINGHARDPLASTIC;ACCORDINGTOTHESCREWSTRUCTUREANDGEOMETRYCHARACTERISTICS,CANBEDIVIDEDINTOCONVENTIONALSCREWANDSCREW,THECONVENTIONALSCREWISALSOKNOWNASTHETHREESECTIONSCREW,ISTHEBASICFORMOFTHESCREW,SCREWFORMHASMANYKINDS,SUCHASSEPARATIONSCREW,SCREW,WAVYSHUNTSCREW,NOMETERINGSECTIONOFSCREWTHECONVENTIONALSCREWTHREADEFFECTIVELENGTHISUSUALLYDIVIDEDINTOFEEDINGSECTIONSCONVEYING,THECOMPRESSIONSECTIONPLASTICSSEGMENT,ANDMETERINGSECTIONAVERAGINGPERIOD,ACCORDINGTOTHEPLASTICPROPERTIESOFDIFFERENT,CANBEDIVIDEDINTOGRADUAL,MUTATIONTYPEANDGENERALTYPESCREWTHETAPEREDSCREWCOMPRESSIONLONG,PLASTICIZINGENERGYTRANSFERFORPVCRELAXATION,POORTHERMALSTABILITYOFPLASTICTHEMUTANTCOMPRESSIONSCREWSHORT,PLASTICIZINGENERGYCONVERSIONISMOREACUTENESS,USEDFORPOLYOLEFIN,PACRYSTALLINEPLASTICSTHEGENERALPURPOSESCREWADAPTABILITYISSTRONG,ANDCANBESUITABLEFORPROCESSINGAVARIETYOFPLASTIC,AVOIDFREQUENTREPLACEMENTOFTHESCREW,INCREASEPRODUCTIONEFFICIENCYDSSCREWDIAMETER,SCREWDIAMETERDIRECTLYAFFECTTHEPLASTICIZINGCAPACITY,WILLDIRECTLYAFFECTTHEINJECTIONVOLUME,THEREFORE,INJECTIONVOLUMEOFINJECTIONMOLDINGMACHINETHESCREWDIAMETERISLARGEL/DSSCREWLENGTHTODIAMETERRATIOLISTHEEFFECTIVELENGTHOFSCREWTHREADPARTOFTHESCREW,THERATIOOFLENGTHTODIAMETERISLARGER,THELENGTHOFTHATTHREAD,DIRECTLYAFFECTTHETHERMALPROCESSOFMATERIALINTHESCREW,THEABILITYTOINFLUENCETHEABSORPTIONOFENERGY,WHILETHEENERGYSOURCEHASTWOPARTSONEPARTISTHEEXTERNALHEATINGCOILTOTHEBARREL,ANDANOTHERPARTISFRICTIONTHERMALANDSHEARHEATGENERATEDBYTHEROTATIONOFTHESCREW,THEEXTERNALMECHANICALENERGYCONVERSION,THEREFORE,L/DSDIRECTLYAFFECTTHEMELTINGEFFECTOFMATERIALANDMELT,BUTIFL/DSISTOOLARGE,THETRANSMISSIONTORQUEINCREASE,INCREASEDENERGYCONSUMPTIONL1FEEDINGLENGTHTHEFEEDINGSECTIONISALSOCALLEDCONVEYINGORFEEDSECTION,INORDERTOIMPROVETHETRANSPORTCAPACITY,SCREWGROOVESURFACEMUSTBESMOOTH,THELENGTHOFTHEL1SHALLENSURETHATTHEMATERIALCONVEYINGLENGTHTOOSHORTENOUGH,BECAUSEL1WILLLEADTOPREMATUREMELTINGMATERIAL,THUSITISDIFFICULTTOGUARANTEETHETRANSPORTATIONCONDITIONSOFSTABILIZINGPRESSURE,WILLBEDIFFICULTTOENSURETHESCREWLATERPLASTICUNDERTHEIROWNGRAVITYFROMTHEHOPPERTOSLIPINTOTHESCREW,SCREWROTATION,THETHRUSTSURFACEFRICTIONINTHEBARRELANDSCREWGROOVEUNDERTHEACTIONOFTHEMATERIALISCOMPRESSEDINTOASOLID,NUTINTENSIVE,THERELATIVEMOTIONALONGTHEDIRECTIONOFTHETHREAD,THISSECTION,PLASTICSOLIDSTATE,NAMELYTHEGLASSSTATETHEDEPTHOFSCREWCHANNELH1FEEDSECTIONH1DEEP,ISRECEIVINGMATERIALS,IMPROVINGTHEFEEDINGQUANTITYANDPLASTICIZINGCAPACITY,BUTWILLAFFECTTHESHEARSTRENGTHOFMATERIALPLASTICIZATIONANDSCREWROOT,GENERALH1≈012016DSL3MELTINGLENGTHMELTINGSECTIONCALLEDHOMOGENEOUSSECTIONORTHEMEASURINGSECTION,MELTFURTHERHOMOGENIZATION,UNIFORMTEMPERATUREINTHECHANNELOFL3SEGMENT,UNIFORMCOMPOSITION,THEFORMATIONOFGOODQUALITYOFMELT,THELENGTHOFL3ISHELPFULTOMELTINTHESCREWGROOVEFLUCTUATIONS,STABLEPRESSURE,CAUSESTHEMATERIALTOFEEDEVENLYEXTRUDEDFROMTHESCREWHEAD,SOITISALSOCALLEDTHEMETERINGSECTIONL3SHORTTIME,HELPTOIMPROVETHEGENERALSCREWPLASTICIZINGCAPACITY,L345DSH3MELTINGSECTIONOFSPIRALGROOVEDEPTH,H3SMALL,SHALLOWGROOVE,IMPROVESTHEPLASTICIZINGEFFECTOFPLASTICMELT,TOMELTHOMOGENIZATION,BUTH3ISTOOSMALLWILLLEADTOHIGHERSHEARRATE,ANDSHEARHEATISTOOLARGE,CAUSINGDEGRADATIONOFTHEMOLECULARCHAIN,THEEFFECTOFMELTQUALITY,;CONVERSELY,IFTHEH3ISTOOLARGE,THEPERFORM,ENHANCEDFLOWSCREWBACKPRESSUREGENERATED,WILLREDUCETHEPLASTICIZINGCAPACITYL2PLASTICIZINGPERIODCOMPRESSIONLENGTHOFTHREADTHETAPEREDSPACEMATERIALCONTINUOUSLYUNDERCOMPRESSION,SHEARANDMIXINGEFFECT,MATERIALFROMTHEL2POINT,MOLTENPOOLINCREASED,TOTHEPOINTOFWELDPOOLHASBEENOCCUPYINGTHEENTIRESCREWGROOVE,THEMATERIALFROMTHEGLASSSTATETHROUGHVISCOELASTICSTATETRANSITIONTOAVISCOUSSTATE,NAMELYTHISSEGMENT,THEPLASTICISSTATEOFCOEXISTENCEINTHEPARTICLESWITHAMOLTENBODYTHELENGTHOFL2WILLAFFECTTHETRANSFORMATIONOFTHEMATERIALFROMTHEGLASSYTOVISCOUSFLOWSTATE,ISTOOSHORTWILLNOTCHANGE,PLUGGINGINTHETERMINALSEGMENTOFTHEL2FORMATIONOFHIGHPRESSURE,TORQUEORAXIALFORCEOFSOLIDMATERIAL;TOOLONGWILLINCREASETHESCREWTORQUEANDUNNECESSARYCONSUMPTION,GENERALL268DSFORTHECRYSTALLINEPLASTICS,MATERIALMELTINGPOINT,MELTINGANARROWRANGE,L2CANBESHORTER,GENERALLY34DS,FORHEATSENSITIVEPLASTIC,THISSECTIONKVETCHINGSPITCH,THESIZEEFFECTOFHELIXANGLE,THUSAFFECTINGTHETRANSPORTEFFICIENCYOFSCREW,GENERALS≈DSECOMPRESSIONRATIOΕH1/H3,NAMELYTHEFEEDINGSECTIONOFSPIRALG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