模具专业英语 第三版 Unit Two.ppt

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1、UnitTwoTheInjectionMoldDesignLesson4TheInjectionMoldingandMachineLesson5Three-plateInjectionMoldLesson6FeedSystemLesson7MoldCavitiesandCoresLesson8EjectionSystemLesson9SplitsLesson10MoldCoolingLesson11RunnerlessMoldsNozzleTypesLesson4TheInjectionMoldingandMachineInjectionm

2、olding（BritishEnglish:moulding）isamanufacturingprocessforproducingpartsfromboththermoplasticandthermosettingplasticmaterials.Materialisfedintoaheatedbarrel，mixed，andforcedintoamoldcavitywhereitcoolsandhardenstotheconfigurationofthemoldcavity.注塑成型是将热塑性和热固性塑料加工成零件的制造过程。材料被放入加热

3、筒中，混合后压入模腔，冷却硬化成模腔的形状。Injectionmoldingmachinesconsistofamaterialhopper，aninjectionramorscrewtypeplunger，andaheatingunit.Theyarealsoknownaspresses.Theyholdthemoldsinwhichthecomponentsareshaped.模具注塑机由一个料斗、注射活塞或螺旋式活塞以及一个加热装置构成。它们也被称为压力机，内含零部件形成的模具。Moldsaretypicallyconstructedf

4、romhardenedsteel，prehardenedsteel，aluminium，and/orberylliumcopperalloy.Prehardenedsteelmoldsarelesswearresistantandareusedforlowervolumerequirementsorlargercomponents.模具通常由淬火钢、预硬钢、铝或铍-铜合金制成。预硬钢模具不耐磨，适用于小批量生产或制造较大的零件。Hardenedsteelmoldsareheattreatedaftermachining.Theseareb

5、yfarthesuperiorintermsofwearresistanceandlifespan.Berylliumcopperisusedinareasofthemoldwhichrequirefastheatremovalorareasthatseethemostshearheatgenerated.淬硬钢模具加工后要进行热处理。这类模具在耐磨性和使用寿命方面具有较强的优势。铍-铜合金适用于制造需快速去热或消除产生的热能的模具。Plasticresinentersthemoldthroughasprueintheinjectionmold

6、，thespruebushistosealtightlyagainstthenozzleoftheinjectionbarrelofthemoldingmachineandtoallowmoltenplastictoflowfromthebarrelintothemold，alsoknownascavity.塑料树脂通过注塑模具的浇道进入模具，浇口套密封紧接在注塑机注射料筒的喷嘴处，让熔化的塑料从料筒流到模具，也就是型腔。Trappedairinthemoldcanescapethroughairventsthataregrindedintot

7、hepartinglineofthemold.Ifthetrappedairisnotallowedtoescape，itiscompressedbythepressureoftheincomingmaterialandissqueezedintothecornersofthecavity，whereitpreventsfillingandcausesotherdefectsaswell.模具里积存的空气可以通过模具分型线的通风口排出。如果积存的空气不能排出，进料的压力会把它们挤压到型腔的角落，这会妨碍填充并导致其他问题。NewWords：in

8、jectionmold注塑模具moldcavity模具型腔injectionram注射活塞clampingforce锁模力beryllium-copp