键盘按键二次顶出三板模具设计  

Design of Three-Plate Mold with Secondary Ejection of Keyboard Key

作　　者：苗秋玲[1] MIAO Qiuling(Intelligent Engineering College,Henan M echanical and Electrical Vocational College,Zhengzhou,Henan 451191,China)

机构地区：[1]河南机电职业学院,智能工程学院,河南郑州451191

出　　处：《塑料》2024年第6期139-143,共5页Plastics

摘　　要：基于扣位凸出和卡扣结构限制,设计了一键盘按键的二次顶出三板模具。该模具为了保证斜顶强度和活动空间,设计了小角度斜顶和顶针强脱相结合的二次顶出方式顶出塑件。二次顶出机构采用双顶针板结构,并且,在顶针板上设计了带有压板、滑块及扣板组成的扣机结构,保证顶针板的顺序顶出。第一次顶出为顶针和斜顶同时顶出,使塑件脱离扣位型芯,为强脱塑件提供空间,第二次顶出为使用顶针顶出,强行将塑件从未脱出的卡扣部分顶出。三板模采用点浇口进浇,利用定距拉杆、限位螺钉和尼龙扣塞等结构实现了模具的顺序开模,保证了塑件和浇注系统凝料的自动分离。该模具既能保证塑件卡扣结构的成型,又实现了产品的安全顶出。Based on the limitations of protruding clip and buckle structure,a three-plate and secondary ejection mold of keyboard key was designed.In order to ensure the strength and activity space of the lifter in the mold,a secondary ejection method combining small angle lifter and strong detachment of the top pin was designed to eject the plastic part.The secondary ejection mechanism was the structure of double ejector plate,and the latch lock structure composed of pressing plate,slider and buckle plate was designed on the ejector plate to ensure the sequential ejection of ejector plate.The first ejection was the simultaneous ejection of the ejector pin and the lifter,so that the plastic part was separated from the clip core to make the space for the forced demolding.The second ejection was the ejection of the ejector pin to forcibly eject the buckle part of the plastic part that had never demolding.Three-plate mold adopts point gate injection,realizes orderly mold opening by fixed distance pull rod,limit screw and nylon latch lock,and ensures automatic separation of plastic part and gating system condensate.The mold could ensure the convenient formation of the plastic buckle structure,while also ensuring the safe ejection of the product.

关 键 词：卡扣 二次顶出 三板模 斜顶 双顶针板 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]