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Injectionmoldingmachinehydraulicsystem
Injectionmoldingmachine
InjectionmoldingmachineTheinjectionmoldingmachineisakindofplasticmachineryreferredtoastheinjectionmoldingmachineorinjectionmoldingmachinethermoplasticorthermosettingmaterialtheuseofplasticmoldintovariousshapesofplasticsmoldingequipment.Injectionmoldingbytheinjectionmoldingmachineandmold.Theplasticcastsshaperisonekindofheatinguptheplastictheplasticizing,poursintowiththeaidoftheadvancementorganizationthemeltingplasticinthemoldcavity,aftercooling,thestereotypiaformstheproducttheplastictotakeshapetheprocessingequipment.Itcandisposethedifferentmold,buttimetakesshapethecontourcomplexproduct,isintheplasticmachineryoneofmainaircrafttypes.Theplasticinjectiontakesshapealreadyhasverymanyforms.Thehydraulicpressuretypeplasticinjectionshaperisoneofthem,itmainlyhasgathersthemoldorganization,injectsthepart,thehydraulictransmissionandtheplasticcastsshaperisonekindofheatinguptheplastictheplasticizing,poursintowiththeaidoftheadvancementorganizationthemeltingplasticinthemoldcavity,aftercooling,thestereotypiaformstheproducttheplastictotakeshapetheprocessingequipment.Itcandisposethedifferentmold,buttimetakesshapethecontourcomplexproduct,isintheplasticmachineryoneofmainaircrafttypes.Theplasticinjectiontakesshapealreadyhasverymanyforms.Thehydraulicpressuretypeplasticinjectionshaperisoneofthem,itmainlyhasgathersthemoldorganization,injectsthepart,thehydraulictransmissionandtheelectricitycontrolsystemandsoonseveralpartsofcompositions,butthehydraulicpump,thehydrauliccylinder,eachkindofhydraulicvalve,theelectricalmachinery,theelectricalpartaswellasthecontrolmeasuringapplianceareindispensablecontrolpart.
Threemajorcomponentsof
(1)clampingcomponents.ItisamoldedmemberinstallationDie.Mainlybyfixedtemplates,dynamictemplatesclampingmechanism,clampinghydrauliccylinder,ejectordevice.
(2)injectionmember.Itisaplasticsinjectionmoldingmachinemember.Mainlybythefeedingdeviceandbarrel,screw,nozzle,topplasticdevice,theinjectionofhydrauliccylinders,injectionseatanditsmobilehydrauliccylindersandothercomponents.
(3)hydraulictransmissionandelectricalcontrolsystemsinstalledinthefuselageontheinsideandoutsidethechamber,isthedrivingforceoftheinjectionmoldingmachineandmanipulatingthecontrolunit.Mainlycomposedofhydraulicpumps,hydraulicvalves,motors,electricalcomponents,andcontrolinstruments.
SZ-250Atypeplasticinjectionmoldingmachinearesmallinjection
moldingmachine.Eachmaximuminjectioncapacityof250g.Basisforthe
plasticinjectionmoldingprocess,injectionmoldingmachinehydraulic
drivesystemshouldmeetthefollowingrequirements:
(1)themoldclampinghydrauliccylinderhavingasufficientlylarge
clampingforce,anditsoperatingspeedcanbebasedontherequirements
ofthetheclampingandKaimoldprocessvaries.
Intheinjectionprocess,themoltenplasticisofteninjectedintothecavitytoahighvoltageof4~15MPa.Thus,therequirementsofthemoldclampingmechanismhavingasufficientlylargeclampingforce,andtoensurethatthemovableplatenandthestationaryplatencloselybonded.Otherwise,themoldawayfromtheseamwillproducethetheoverflowedgesphenomenonofplasticproducts.Tothisend,withoutmakingthesizeofthemoldclampinghydrauliccylinderistoolarge,andthepressureistoohigh,oftenusingthemechanicallinkageforceincreasingmechanismtoachievetheclampingandclamping.
Inordertoshortenthetimeofairtravel,improveproductivity,clampinghydrauliccylindershouldbefast-movingactiontemplate.However,inordertopreventdamagetothemoldandproducts,avoidmachinesubjecttostrongvibrationandimpact-generatednoise,butalsoconsiderthebufferofmoldopeningandclosingprocess.Accordingly,thehydrauliccylinderinthemoldopeningandclosingprocess,thespeedofeachstageisnotthesame.Usuallyslow—fast—slowprocessofchangefaster,andfastslowchanges.
(2)injectionseatoverallmovement(forwardorbackward).Forward
withsufficientthrusttoensurethatthenozzleisbroughtintoclosecontactwiththemoldgate.Further,itshouldbeabletofeedatafixedfeed,beforefeeding,andafterthreedifferentpreformitsactiontobeadjusted.
(3)thepressureandvelocityofinjectionshouldbecapableofadjustment,inordertomeettherawmaterial,differentthearticlegeometryandlayoutofthemoldgateandsothesizeoftheinjectionforcerequirements,aswellastherequirementsofthedifferentproductsontheinjectionspeed.
(