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注射機更換塑料和顏色的操作規程步驟:

來源:塑膠機械發布時間:2021-03-22 18:18:35點擊率:
塑料制品的特性及關閉注意事項
各類塑膠原料性能各不相同,停機時考慮此橡膠性能,可節約時間,避免塑膠變質。
各種塑料的特性:
硬聚苯板有很好的熱穩定性,在成型溫度下長期受熱也不會分解,因此只需關掉電熱就可以停機ABS是一種硬粘合劑,具有很好的熱穩定性,在成型溫度較高時,長期受熱不會分解,所以只需關閉電熱即可。

聚丙烯為軟膠,熱穩定性好,成型溫度長時間受熱不會分解,因此停機僅需關掉電熱即可由于電腦暫時關閉(例如,晚上的工作沒有開始),必須保持槍管約160,以免受潮。為了更換材料, PE必須清洗槍管,卸螺絲,用銅刷清洗螺絲。


停機前, PVC感溫材料關閉電熱,將 PVC推至槍管溫度降至150度, 用 PP、 PE等熱穩定塑料將槍管全部推至槍口。
由于 PMMA易在高溫下分解,但其正常成型溫度的熱穩定性較好,因此在停機時只需關掉電熱器。
尼龍 PA這種塑料熱穩定性好,停機前不要清洗槍管,應立即切斷電源。要不然,塑料15分鐘就會變質。
POM是熱感應塑料,在停止工作時關閉電熱10分鐘前,先將壓力降到零,然后繼續將桶中的塑料推開,更換材料時先用軟膠清洗。
二、同一材料的顏色變化
當更換相同的顏色時,將淺色換為深色,而將透明的材料換為不透明的材料則比較容易。
經十多次工程實踐,在色差較大時,除去進口產品,用氣缸蓋清洗。
三、異種材料的替換
熱塑性膠在高溫下會粘在金屬表面,低溫下則不會粘著,更換作用就是利用這個特性,將需要更換的材料粘在桶內壁,取代了用高粘度材料切割出來的異種材料。
四、更換塑料和色彩
這樣的話,特性相似的塑料應該被選擇,并使用清洗劑。普通的清潔劑有螺絲水,煤油等。
這樣的話,如果桶不清潔干凈,就要清除進口,桶氣缸蓋清潔,必要時還要清潔螺絲。

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