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高
冲压毛刺问题，多数是模具刃口钝了。我们一般定个标准：冲压多少万次强制修模一次。
W
<p>模温对缩水的不均匀影响确实厉害。我以前遇到过一案例是一个平板产品，靠近运水入口那侧温度低，产品尺寸偏大；靠近出水口那侧温度高，缩水率大，产品尺寸偏小。后来我们在出水口附近加了一组独立控温的油温机，把模温差控制在5℃以内，缩水差异就基本消除了。这个在薄壁产品上尤其明显，模温控制比充填参数调整更关键。</p>