用英文介绍模具的组成一

-1-Thistrialversioncanuseonlyapartofitem.FunctionofMajorPartsYouwilllearnaboutthenamesandfunctionsofmajorpartsusedforanejectionsystem.Apushbackpinandacoilspringareusedforregularmolds,whereasapushbackpinandagasspringaresometimesusedforlargesizemolds.Thisfigureillustratesanexampleofalargemold.EjectorStopper(StrokeEndPin)-2-Ablockthatstopsanejectorplatefromgoingforward[stoppin]SprueLockPinsApinhastheedgeofwhichisundercuttopullapartinmoldopeningandremoveaspruefromaspruebush.Aftermoldopening,thispinwillfunctionasanejectorpinandejectsthespruefromaapruebush.Alsoitreleasesgascontainedinmoltenplastic.-3-EjectorPlateAlsocalledapushplate.Aplatethatsupportsanedgeofanejectorpinorapushbackpintoejectapartfromamold.Itisejectedbyanejectordeviceofamoldingmachine,andreturnedtotheoriginalpositionwhentheedgeofapushbackpincollideswithacavityplateduringmoldclamping.StopPinsAstopperinstalledtokeepanejectorplatehorizontalorpreventtheejectorplatefrom-4-retreatingtoofaranddamagingacoreadaptorplate.EjectorGuidePins/EjectorGuideBushAnejectorguidepinisalsocalledapushplateguidepinandfunctionsasaguideforslidingofanejectorplate.Becauseanejectorguidebushslides,ahardmaterialisused.Anejectorguidebushisalsocalledapushplateguidebush.Itisacylindricalpartusedtodeterminethepositionbymatchingtheejectorguidepin.-5-PushRodsAshaftlinkedtotheforce(hydraulicormechanical)ofthemoldingmachineinordertogettheejectorplatetowork.-6-GasSpring/GasSpringHolderAgasspringforciblypushesbackanejectorplate.Thestrengthofthespringisadjustedbyadjustingthefillingpressure.Whenusingagasspring,makesuretoavoidhightemperature(heatmayexpandgas,deterioratingtheoriginalfunctionsofagasspring).CalculatingFillingPressureTofigureoutfillingpressure(P)fromearlyload(Wo):P=100*Wo/C(C:constant)Tofigureoutcorrespondingspringconstant(K)fromfillingpressure(P)andgasspringconstant(G):K=G*P/100Tofigureoutforcebydisplacement(x)fromthetopD.C.ofthepistonrod(W):W=P(Gx+C)*Seethecatalogofeachmanufacturerforconstant(C)andgasspringconstant(G).Agasspringholderisablockusedtofixagasspringtoanejectorplate.Counterboreprocessforaboltinstallationhole,foritalsofunctionsasanpushrod.-7-