0根据耳机支架塑件的结构特点，介绍了其模具的设计过程，采用点浇口形式，提高了产品的表面质量；采用斜滑块内，外侧向抽芯及斜顶块结构不但使其模具布局合理，而且解决了难出模的问题。最后，还详细说明了其模具的工作过程。塑料成型就是将各种形状的塑料原料(粉料,粒料,溶液,分散体)制成所需形状或坯件的过程.塑料成型的方法很多,如注塑,吹塑,挤出等.而注塑成型以其能成型高尺寸精度,高复杂性的制品和高效率占有重要一席。塑料注塑成型过程是塑料原料从注塑机的料斗进入加热筒,经塑化后由拄塞或螺杆推动,再一地压力下通过喷嘴注入模具型腔.经冷却固化后开模而获得成品.除极少数几种塑件外,几乎所有塑件都可以注塑成型,踞有关资料统计,注塑制品占所有模具塑件总产量的三分之一;注塑模具占塑料模具数量的二分之一以上,注塑成型制品的应用已十分广泛,并随着塑料原料的不断改进,已逐步代替原来的金属和非金属材料的制品,发展注塑模具大有可为。：耳机支架，点浇口，侧向抽芯，注塑模1AbstraceAccordingtothestructuralcharacteristicsofearphonebracket,thedesignprocessofitsmoldisintroduced.Byusingpin-pointgate,appearancequalityoftheproductisimproved;byusinginnerandouterside-coreslidesandangled-liftstructures,thelayoutofthemoldismadereasonablyandthedifficultyofdemouldingissolved.Finally,Theworkprocessofthemoldiselaborated.Theplasticinjectionmoldingprocessisplasticrawmaterialenterstheheatingmufffrominjectionmoldingmachine'shopper,afterplasticizingbyleansonfillsorthescrewrodimpels,underaplacepressurepoursintothemolddiespaceagainthroughthespraynozzle.Solidifiesaftercoolingthediesinkingobtainstheendproduct.Besidesfewseveralkindsmodel,nearlyallmodelstobepossibletheinjectionmolding,secludesthepertinentdatastatistics,theinjectionmoldingproductoccupiesallmoldstomodelanultimateoutput1/3;Theinjectionmoldaccountsfortheplasticmoldquantityabove1/2,injectionmoldingproductapplicationalreadyverywidespread,andalongwiththeplasticrawmaterial'sunceasingimprovement,hasreplacedtheoriginalmetalandthenonmetallicmaterialproductgradually,thedevelopmentinjectionmoldhasbrightprospects.Keywords:Earphonebracket,Pin-pointgate,Side-coreslide,Injectionmold21引言.................................................................................................................................32塑件结构特点及模具材料的选择...............................................................................32.1模具材料的选择.....................................................................