塑胶模具二次顶出，强制脱模
内容加深，这次介绍二次顶出和强制脱模，这个在一些特殊模具中经常会用到一. 二次顶出、强制脱模使用范围
1、适用产品较深，抱紧力大，二次顶出，减小每次顶出的抱紧力。
2、成品倒勾较小,无法作其他倒勾装置处理.
3、第一次脱出型腔或抽芯让出塑料弹性变形空间，
第二次利用塑料的弹性变形将产品顶出.
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二. 二次顶出、强制脱模结构示意
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三. 二次顶出、强制脱模结构图
1.四板结构
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2.内 外倒勾
3.弹簧辅助
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4.机械式
因产品很深，采用顶块顶出，由于顶块上装有入子，为了使其与成品脱离，采用机械式二次顶出方式。
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四. 延迟顶出结构介绍
对于又深又高的成品,在成型完成后,容易紧包在模仁上,此时一般均需设置顶出块以帮助成品脱模,但在顶出瞬间,因塑料高度方向缩水显著,顶块与产品产生间隙。若此时顶针一并顶出易造成塑料成品表面有顶白情形,为防止此情形,建议采用将顶针延迟顶出的方式.
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五. 强制脱模-- 优缺点
强制脱模的优点:
脱模结构简单,成本低,加工方便!
强制脱模的优点:
脱模结构简单,成本低,加工方便! 这个厉害 都来关注[呲牙][呲牙][呲牙] 模具人加油！！！[赞][赞][赞] 学习了，好文章，慢慢消化。 转发了
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