外文翻译--注塑成型机.doc

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,angletypethree(1)Horizontalinjectionmoldingmachine:horizontalinjectionmoldingmachineisthemostcommontype.Itscharacteristicisthecenterlineinjectionassemblyandclampingassemblycenterlineofconcentricorconsistent,alsowiththeparalleltothemountingsurface.Ithastheadvantagesoflowcenterofgravity,steadywork,moldinstallation,operationandrepair,whichareconvenient,themoldopeningbig,smalloccupiedspaceheight；butcoversanareaoflarge.(2)Verticalinjectionmoldingmachine:itscharacteristicisclampingdeviceandinjectiondeviceoftheaxislinearrangementandperpendiculartotheground.Italsohastheadvantagesofsmalloccupiedarea,convenientassemblyanddisassemblyofinsertmold,easyinstallation,sincethebucketintothematerialplasticizationisevenly,easytorealizeautomationandmachineautomationlinemanagement.Thedisadvantageofitisthetopproductisnoteasytofalloffautomatically,itoftenneedsmanualorothermethodtotakeout,andisnoteasytorealizefullautomaticoperationandlargeproductsinjection；machineheight,feeding,inconvenientrepair.(3)Angletypeinjectionmoldingmachine:injectiondeviceandamoldingdeviceaxisarearrangedvertically.Accordingtotheinjectionassemblycenterlinesarevertical,horizontalandrelativepositionoftheverticalandhorizontalinstallation,recumbentpoints:horizontalvertical,injectionassemblylineandplaneparallel,andmoldassemblycenterlineandthebaseofverticalandhorizontal,vertical；injectionassemblycenterlineandthesurfacevertical,anddieassemblycenterlineandthereferencesurface.Theadvantagesofangletypeinjectionmachinehastheadvantagesofbothhorizontalandverticalinjectionmoldingmachine,specialapplytothemoldopeningsidegateasymmetricgeometryproducts.Atpresent,theinjectiondevicearecommoncylinderformanddoublecylinderform,Iplanttheinjectionmoldingmachineisdoublecylinderform,andisdirectlydrivenbyahydraulicmotorofscrewininjectionmolding.Becauseofdifferentmanufacturers,differenttypesofmachinecomponentsarenotthesame；thefollowingwillmakeaconcreteanalysisofourfactorywithmachine.Theworkingprincipleis:theplastic,screwinplasticpartsinthedrivethemainshafttorotatethroughthehydraulicmotor,spindleendisconnectedwiththescrew,andtheotherendofthehydraulicmotorkeyconnection,screwrotation,plasticityandmeltclassifiedpushedtothestoragechambercylinderfront,atthesametime,screwbackinthereactionmaterial,andthroughthethrustbearingthethrustseatback,pullingthepistonrodthroughthenutstraightback.Tocompletethemeasurement,injection,theinjectioncylinderrodchamberoilinletthroughthebearingtopushthepistonrodtocompletetheaction,therodchamberpistonoilinlettopushthepistonrodandscrewandfinishtheinjection.Theworkprincipleofscrewplasticizingcomponents:performs,screwrotation,fromthematerialinletintothescrewgroovematerialadvancingcontinuouslyforward,heatingringthroughthebarrelwalloftheheattransfertothespiralgroovematerial,solidmaterialinthedualroleofexternalheatingandscrewrotationalshear,andthroughthethermalprocessfunctionalsectionofscrew,achievingtheplasticizingandmelting,meltingawaythecheckringaroundthescrewhead,frontendthroughthechannelintothescrew,andgeneratesbackpressure,pushthescrewaftertheshiftmeasurementcompletemelt,atthetimeofinjectionscrewup,pistoneffect,withrapidadvancement,inthecylinder,willmeltreservoirmaterialinthechamberthroughthenozzleintothemold.Screwplasticizingcomponentsgenerallyhavethefollowingcharacteristics:Thescrewhastwofunctionsofplasticizingandinjection；Thescrewinplastic,onlyfortheplasticTheplasticsinplasticizingprocess,thermalprocessthroughthanextrusion；Thescrewontheplasticizingandinjectionweretooccur,axialdisplacement,andscrewinworkingstateofintermittentwhentostop,thusforminganon-stabilityofscrewplasticizingprocess.(1)ScrewScrewisakeycomponentofplasticparts,directcontactwithplastic,plasticthroughtheeffectivelengthofthescrewchannel,aftertheheatforalongtime,mustgothrough3states(glass,behavior,viscousstate)transformation,geometricparameters,geometry,lengthoffunctionalsectionofscrewwilldirectlyaffectthetransmissionefficiencyandtheplasticizingqualityofplastic,willultimatelyaffectthequalityofinjectionmoldingcycleandproduct.Comparedwiththeextrusionscrew,plasticscrewhasthefollowingcharacteristics:Theinjectionscrewlength-diameterratioandcompressionratioissmall；Screwgrooveofinjectionscrewissectionofthedeep；Theinjectionscrewsfeedingsectionsislonger,andareshort；Theinjectionscrewwork,plasticizingcapacityandmelttemperaturewillvarywiththeaxialdisplacementscrewandchange.(I)classification,screwInjectionscrewaccordingtotheplasticadaptability,canbedividedintogeneralandspecialscrew,generalalsocalledconventionalscrew,canbeprocessedwithlowviscosity,mostofthethermoplastic,civilplasticcrystallineandamorphousandengineeringplastics,isthemostbasicformofthescrew,andthecorrespondingandspecialscrew,isusedtoprocesswithordinaryscrewprocessinghardplastic；accordingtothescrewstructureandgeometrycharacteristics,canbedividedintoconventionalscrewandscrew,theconventionalscrewisalsoknownasthethreesectionscrew,isthebasicformofthescrew,screwformhasmanykinds,suchasseparationscrew,screw,wavyshuntscrew,nometeringsectionofscrew.Theconventionalscrewthreadeffectivelengthisusuallydividedintofeedingsections(conveying),thecompressionsection(Plasticssegment),andmeteringsection(averagingperiod),accordingtotheplasticpropertiesofdifferent,canbedividedintogradual,mutationtypeandgeneraltypescrew.Thetaperedscrew:compressionlong,plasticizingenergytransferforPVCrelaxation,poorthermalstabilityofplastic.Themutantcompressionscrew:short,plasticizingenergyconversionismoreacuteness,usedforpolyolefin,PAcrystallineplastics.Thegeneralpurposescrew:adaptabilityisstrong,andcanbesuitableforprocessingavarietyofplastic,avoidfrequentreplacementofthescrew,increaseproductionefficiency.DSscrewdiameter,screwdiameterdirectlyaffecttheplasticizingcapacity,willdirectlyaffecttheinjectionvolume,therefore,injectionvolumeofinjectionmoldingmachinethescrewdiameterislarge.L/ds-screwlengthtodiameterratio.Listheeffectivelengthofscrewthreadpartofthescrew,theratiooflengthtodiameterislarger,thelengthofthatthread,directlyaffectthethermalprocessofmaterialinthescrew,theabilitytoinfluencetheabsorptionofenergy,whiletheenergysourcehastwoparts:onepartistheexternalheatingcoiltothebarrel,andanotherpartisfrictionthermalandshearheatgeneratedbytherotationofthescrew,theexternalmechanicalenergyconversion,therefore,L/dsdirectlyaffectthemeltingeffectofmaterialandmelt,butifL/dsistoolarge,thetransmissiontorqueincrease,increasedenergyconsumption.L1-feedinglength.Thefeedingsectionisalsocalledconveyingorfeedsection,inordertoimprovethetransportcapacity,screwgroovesurfacemustbesmooth,thelengthoftheL1shallensurethatthematerialconveyinglengthtooshortenough,becauseL1willleadtoprematuremeltingmaterial,thusitisdifficulttoguaranteethetransportationconditionsofstabilizingpressure,willbedifficulttoensurethescrewlater.Plasticundertheirowngravityfromthehoppertoslipintothescrew,screwrotation,thethrustsurfacefrictioninthebarrelandscrewgrooveundertheactionofthematerialiscompressedintoasolid,nutintensive,therelativemotionalongthedirectionofthethread,thissection,plasticsolidstate,namelytheglassstate.ThedepthofscrewchannelH1-feedsection.H1deep,isreceivingmaterials,improvingthefeedingquantityandplasticizingcapacity,butwillaffecttheshearstrengthofmaterialplasticizationandscrewroot,generalH1(0.120.16)ds.L3-meltinglength.Meltingsectioncalledhomogeneoussectionorthemeasuringsection,meltfurtherhomogenization,uniformtemperatureinthechannelofL3segment,uniformcomposition,theformationofgoodqualityofmelt,thelengthofL3ishelpfultomeltinthescrewgroovefluctuations,stablepressure,causesthematerialtofeedevenlyextrudedfromthescrewhead,soitisalsocalledthemeteringsection.L3shorttime,helptoimprovethegeneralscrewplasticizingcapacity,L3=(45)ds.H3-meltingsectionofspiralgroovedepth,H3small,shallowgroove,improvestheplasticizingeffectofplasticmelt,tomelthomogenization,butH3istoosmallwillleadtohighershearrate,andshearheatistoolarge,causingdegradationofthemolecularchain,theeffectofmeltquality,；conversely,iftheH3istoolarge,theperform,enhancedflowscrewbackpressuregenerated,willreducetheplasticizingcapacity.L2-plasticizingperiod(compression)lengthofthread.Thetaperedspacematerialcontinuouslyundercompression,shearandmixingeffect,materialfromtheL2point,moltenpoolincreased,tothepointofweldpoolhasbeenoccupyingtheentirescrewgroove,thematerialfromtheglassstatethroughviscoelasticstatetransitiontoaviscousstate,namelythissegment,theplasticisstateofcoexistenceintheparticleswithamoltenbody.ThelengthofL2willaffectthetransformationofthematerialfromtheglassytoviscousflowstate,istooshortwillnotchange,pluggingintheterminalsegmentoftheL2formationofhighpressure,torqueoraxialforceofsolidmaterial；toolongwillincreasethescrewtorqueandunnecessaryconsumption,generalL2=(68)ds.Forthecrystallineplastics,materialmeltingpoint,meltinganarrowrange,L2canbeshorter,generally(34)ds,forheat-sensitiveplastic,thissectionKvetching.S-Pitch,thesizeeffectofhelixangle,thusaffectingthetransportefficiencyofscrew,generalSds.E-Compressionratio.=h1/h3,namelythefeedingsectionofspiralgroovedepthH1andthemeltingsectionofspiralgroovedepthratioofh3.E,willenhancethesheareffect,butwillweakentheplasticizingcapacity,generallyspeaking,slightlysmalleraswell,tohelpimprovetheplasticizingcapacityandincreasetheadaptabilitytorawmaterials,forcrystallineplastics,thecompressionratiois2.63.0.Forlowviscosityandthermalstabilityofplastic,canchoosethe