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注塑制品氣泡的原因分析

發(fā)布時(shí)間：2014-05-08 瀏覽次數(shù)：369 返回列表

注塑制品氣泡的原因分析

　　氣泡（真空泡）的氣體十分稀薄屬于真空泡。一般說來，如果在開模瞬間已發(fā)現(xiàn)存在氣泡是屬于氣體干擾問題。真空泡的形成是由于充注進(jìn)塑料不足或壓力較低。在模具的急劇冷卻作用下，與型腔接角的燃料牽拉，造成體積損失的結(jié)果。

解決辦法：

（1）提高注射能量：壓力、速度、時(shí)間和料量，并提高背壓，使充模豐滿。

（2）增加料溫流動(dòng)順暢。降低料溫減少收縮，適當(dāng)提高模溫，特別是形成真空泡部位的局部模溫。

（3）將澆口設(shè)置在制件厚的部份，改善噴嘴、流道和澆口的流動(dòng)狀況，減少壓務(wù)的消耗。

（4）改進(jìn)模具排氣狀況。

上一篇：注塑制品開裂的原因分析

下一篇：注塑制品翹曲變形的原因分析

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