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英文原文InjectionmoldingmachineInjectionmoldingmachineisplasticmachineforshort.Itusesthethermalphysicalpropertiesofplastics,thematerialfromthehopperintothebarrel,isbarreledbyheatingcoilheat,sothematerialwillbemelted,whichisarrangedbytheexternalforceundertheactionofthemotordrivingtherotationofthescrewinthebarrel.Thematerialinthescrewundertheactionofthescrewgroove,alongtheforwarddeliveryandcompaction,dualrolethematerialintheheatingandshearundergraduallyplasticizing,meltedandhomogenized,whenthescrewrotates,thematerialinthescrewchannelfrictionandshearforce,themoltenmaterialispushedtothescrewhead.Atthesametime,thescrewwithbackwardinthematerial,thescrewheadformingmaterialstoragespace,completingtheplasticizingprocess,then,screwintheinjectioncylinderpistonthrustundertheactionofhighspeed,highpressure,inthematerialstoragechamber,themeltthroughthenozzletothemoldcavityinjection,cavitymeltafterpressing,cooling,solidification,moldinthemoldclosingmechanismofactionnext,openmold,andthroughtheejectiondevicetofinalizethedesigngoodproductsfallfromthetopdie.Configurationaccordingtotheclampingmemberandtheinjectioncomponenttypehashorizontal,vertical,angletypethree1Horizontalinjectionmoldingmachinehorizontalinjectionmoldingmachineisthemostcommontype.Itscharacteristicisthecenterlineinjectionassemblyandclampingassemblycenterlineofconcentricorconsistent,alsowiththeparalleltothemountingsurface.Ithastheadvantagesoflowcenterofgravity,steadywork,moldinstallation,operationandrepair,whichareconvenient,themoldopeningbig,smalloccupiedspaceheightbutcoversanareaoflarge.2Verticalinjectionmoldingmachineitscharacteristicisclampingdeviceandinjectiondeviceoftheaxislinearrangementandperpendiculartotheground.Italsohastheadvantagesofsmalloccupiedarea,convenientassemblyanddisassemblyofinsertmold,easyinstallation,sincethebucketintothematerialplasticizationisevenly,easytorealizeautomationandmachineautomationlinemanagement.Thedisadvantageofitisthetopproductisnoteasytofalloffautomatically,itoftenneedsmanualorothermethodtotakeout,andisnoteasytorealizefullautomaticoperationandlargeproductsinjectionmachineheight,feeding,inconvenientrepair.3Angletypeinjectionmoldingmachineinjectiondeviceandamoldingdeviceaxisarearrangedvertically.Accordingtotheinjectionassemblycenterlinesarevertical,horizontalandrelativepositionoftheverticalandhorizontalinstallation,recumbentpoints①horizontalvertical,injectionassemblylineandplaneparallel,andmoldassemblycenterlineandthebaseofverticalandhorizontal,verticalinjectionassemblycenterlineandthesurfacevertical,anddieassemblycenterlineandthereferencesurface.Theadvantagesofangletypeinjectionmachinehastheadvantagesofbothhorizontalandverticalinjectionmoldingmachine,specialapplytothemoldopeningsidegateasymmetricgeometryproducts.Atpresent,theinjectiondevicearecommoncylinderformanddoublecylinderform,Iplanttheinjectionmoldingmachineisdoublecylinderform,andisdirectlydrivenbyahydraulicmotorofscrewininjectionmolding.Becauseofdifferentmanufacturers,differenttypesofmachinecomponentsarenotthesamethefollowingwillmakeaconcreteanalysisofourfactorywithmachine.Theworkingprincipleistheplastic,screwinplasticpartsinthedrivethemainshafttorotatethroughthehydraulicmotor,spindleendisconnectedwiththescrew,andtheotherendofthehydraulicmotorkeyconnection,screwrotation,plasticityandmeltclassifiedpushedtothestoragechambercylinderfront,atthesametime,screwbackinthereactionmaterial,andthroughthethrustbearingthethrustseatback,pullingthepistonrodthroughthenutstraightback.Tocompletethemeasurement,injection,theinjectioncylinderrodchamberoilinletthroughthebearingtopushthepistonrodtocompletetheaction,therodchamberpistonoilinlettopushthepistonrodandscrewandfinishtheinjection.Theworkprincipleofscrewplasticizingcomponentsperforms,screwrotation,fromthematerialinletintothescrewgroovematerialadvancingcontinuouslyforward,heatingringthroughthebarrelwalloftheheattransfertothespiralgroovematerial,solidmaterialinthedualroleofexternalheatingandscrewrotationalshear,andthroughthethermalprocessfunctionalsectionofscrew,achievingtheplasticizingandmelting,meltingawaythecheckringaroundthescrewhead,frontendthroughthechannelintothescrew,andgeneratesbackpressure,pushthescrewaftertheshiftmeasurementcompletemelt,atthetimeofinjectionscrewup,pistoneffect,withrapidadvancement,inthecylinder,willmeltreservoirmaterialinthechamberthroughthenozzleintothemold.ScrewplasticizingcomponentsgenerallyhavethefollowingcharacteristicsThescrewhastwofunctionsofplasticizingandinjectionThescrewinplastic,onlyfortheplasticTheplasticsinplasticizingprocess,thermalprocessthroughthanextrusionThescrewontheplasticizingandinjectionweretooccur,axialdisplacement,andscrewinworkingstateofintermittentwhentostop,thusforminganonstabilityofscrewplasticizingprocess.1ScrewScrewisakeycomponentofplasticparts,directcontactwithplastic,plasticthroughtheeffectivelengthofthescrewchannel,aftertheheatforalongtime,mustgothrough3statesglass,behavior,viscousstatetransformation,geometricparameters,geometry,lengthoffunctionalsectionofscrewwilldirectlyaffectthetransmissionefficiencyandtheplasticizingqualityofplastic,willultimatelyaffectthequalityofinjectionmoldingcycleandproduct.Comparedwiththeextrusionscrew,plasticscrewhasthefollowingcharacteristicsTheinjectionscrewlengthdiameterratioandcompressionratioissmallScrewgrooveofinjectionscrewissectionofthedeepTheinjectionscrewsfeedingsectionsislonger,andareshortTheinjectionscrewwork,plasticizingcapacityandmelttemperaturewillvarywiththeaxialdisplacementscrewandchange.Iclassification,screwInjectionscrewaccordingtotheplasticadaptability,canbedividedintogeneralandspecialscrew,generalalsocalledconventionalscrew,canbeprocessedwithlowviscosity,mostofthethermoplastic,civilplasticcrystallineandamorphousandengineeringplastics,isthemostbasicformofthescrew,andthecorrespondingandspecialscrew,isusedtoprocesswithordinaryscrewprocessinghardplasticaccordingtothescrewstructureandgeometrycharacteristics,canbedividedintoconventionalscrewandscrew,theconventionalscrewisalsoknownasthethreesectionscrew,isthebasicformofthescrew,screwformhasmanykinds,suchasseparationscrew,screw,wavyshuntscrew,nometeringsectionofscrew.Theconventionalscrewthreadeffectivelengthisusuallydividedintofeedingsectionsconveying,thecompressionsectionPlasticssegment,andmeteringsectionaveragingperiod,accordingtotheplasticpropertiesofdifferent,canbedividedintogradual,mutationtypeandgeneraltypescrew.Thetaperedscrewcompressionlong,plasticizingenergytransferforPVCrelaxation,poorthermalstabilityofplastic.Themutantcompressionscrewshort,plasticizingenergyconversionismoreacuteness,usedforpolyolefin,PAcrystallineplastics.Thegeneralpurposescrewadaptabilityisstrong,andcanbesuitableforprocessingavarietyofplastic,avoidfrequentreplacementofthescrew,increaseproductionefficiency.DSscrewdiameter,screwdiameterdirectlyaffecttheplasticizingcapacity,willdirectlyaffecttheinjectionvolume,therefore,injectionvolumeofinjectionmoldingmachinethescrewdiameterislarge.L/dsscrewlengthtodiameterratio.Listheeffectivelengthofscrewthreadpartofthescrew,theratiooflengthtodiameterislarger,thelengthofthatthread,directlyaffectthethermalprocessofmaterialinthescrew,theabilitytoinfluencetheabsorptionofenergy,whiletheenergysourcehastwopartsonepartistheexternalheatingcoiltothebarrel,andanotherpartisfrictionthermalandshearheatgeneratedbytherotationofthescrew,theexternalmechanicalenergyconversion,therefore,L/dsdirectlyaffectthemeltingeffectofmaterialandmelt,butifL/dsistoolarge,thetransmissiontorqueincrease,increasedenergyconsumption.L1feedinglength.Thefeedingsectionisalsocalledconveyingorfeedsection,inordertoimprovethetransportcapacity,screwgroovesurfacemustbesmooth,thelengthoftheL1shallensurethatthematerialconveyinglengthtooshortenough,becauseL1willleadtoprematuremeltingmaterial,thusitisdifficulttoguaranteethetransportationconditionsofstabilizingpressure,willbedifficulttoensurethescrewlater.Plasticundertheirowngravityfromthehoppertoslipintothescrew,screwrotation,thethrustsurfacefrictioninthebarrelandscrewgrooveundertheactionofthematerialiscompressedintoasolid,nutintensive,therelativemotionalongthedirectionofthethread,thissection,plasticsolidstate,namelytheglassstate.ThedepthofscrewchannelH1feedsection.H1deep,isreceivingmaterials,improvingthefeedingquantityandplasticizingcapacity,butwillaffecttheshearstrengthofmaterialplasticizationandscrewroot,generalH1≈0.120.16ds.L3meltinglength.Meltingsectioncalledhomogeneoussectionorthemeasuringsection,meltfurtherhomogenization,uniformtemperatureinthechannelofL3segment,uniformcomposition,theformationofgoodqualityofmelt,thelengthofL3ishelpfultomeltinthescrewgroovefluctuations,stablepressure,causesthematerialtofeedevenlyextrudedfromthescrewhead,soitisalsocalledthemeteringsection.L3shorttime,helptoimprovethegeneralscrewplasticizingcapacity,L345ds.H3meltingsectionofspiralgroovedepth,H3small,shallowgroove,improvestheplasticizingeffectofplasticmelt,tomelthomogenization,butH3istoosmallwillleadtohighershearrate,andshearheatistoolarge,causingdegradationofthemolecularchain,theeffectofmeltquality,conversely,iftheH3istoolarge,theperform,enhancedflowscrewbackpressuregenerated,willreducetheplasticizingcapacity.L2plasticizingperiodcompressionlengthofthread.Thetaperedspacematerialcontinuouslyundercompression,shearandmixingeffect,materialfromtheL2point,moltenpoolincreased,tothepointofweldpoolhasbeenoccupyingtheentirescrewgroove,thematerialfromtheglassstatethroughviscoelasticstatetransitiontoaviscousstate,namelythissegment,theplasticisstateofcoexistenceintheparticleswithamoltenbody.ThelengthofL2willaffectthetransformationofthematerialfromtheglassytoviscousflowstate,istooshortwillnotchange,pluggingintheterminalsegmentoftheL2formationofhighpressure,torqueoraxialforceofsolidmaterialtoolongwillincreasethescrewtorqueandunnecessaryconsumption,generalL268ds.Forthecrystallineplastics,materialmeltingpoint,meltinganarrowrange,L2canbeshorter,generally34ds,forheatsensitiveplastic,thissectionKvetching.SPitch,thesizeeffectofhelixangle,thusaffectingthetransportefficiencyofscrew,generalS≈ds.ECompressionratio.εh1/h3,namelythefeedingsectionofspiralgroovedepthH1andthemeltingsectionofspiralgroovedepthratioofh3.E,willenhancethesheareffect,butwillweakentheplasticizingcapacity,generallyspeaking,εslightlysmalleraswell,tohelpimprovetheplasticizingcapacityandincreasetheadaptabilitytorawmaterials,forcrystallineplastics,thecompressionratiois2.63.0.Forlowviscosityandthermalstabilityofplastic,canchoosethe
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