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<p>PP料产品,壁厚3mm,缩水位置在加强筋背面。模温40度,保压压力80bar,保压时间8秒。试了加大保压到120bar缩水有改善但产品粘模了。请问有没有更好的工艺参数方向?</p>
<p>缩水的问题,保压压力升到120bar粘模,可能不只是压力问题。PP料的收缩率一般在1.5-2.5%,加强筋背部的缩水很多时候是冷却不够。建议:1)在加强筋对应位置加冷却水道;2)适当降低模温到30度试试;3)保压切换位置往前调,让更多熔体在保压阶段填充。</p>