中英文文献翻译注塑成型机.docx

中英文文献翻译注塑成型机.docx

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中英文文献翻译注塑成型机

英文原文

Injectionmoldingmachine

Injectionmoldingmachineisplasticmachineforshort.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:

①horizontalvertical,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,onlyfortheplastic

Theplasticsinplasticizingprocess,thermalprocessthroughthanextrusion;

Thescrewontheplasticizingandinjectionweretooccur,axialdisplacement,andscrewinworkingstateofintermittentwhentostop,thusforminganon-stabilityofscrewplasticizingprocess.

（1）Screw

Screwisakeycomponentofplasticparts,directcontactwithplastic,plasticthroughtheeffectivelengthofthescrewchannel,aftertheheatforalongtime,mustgothrough3states（glass,behavior,viscousstate）transformation,geometricparameters,geometry,lengthoffunctionalsectionofscrewwilldirectlyaffectthetransmissionefficiencyandtheplasticizingqualityofplastic,willultimatelyaffectthequalityofinjectionmoldingcycleandproduct.

Comparedwiththeextrusionscrew,plasticscrewhasthefollowingcharacteristics:

Theinjectionscrewlength-diameterratioandcompressionratioissmall;

Screwgrooveofinjectionscrewissectionofthedeep;

Theinjectionscrewsfeedingsectionsislonger,andareshort;

Theinjectionscrewwork,plasticizingcapacityandmelttemperaturewillvarywiththeaxialdisplacementscrewandchange.

（I）classification,screw

Injectionscrewaccordingtotheplasticadaptability,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≈（0.12~0.16）ds.

L3-meltinglength.Meltingsectioncalledhomogeneoussectionor