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    歡迎來到重慶市賽普塑料制品有限公司官方網站!

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    當前位置: 首頁 » 賽普新聞中心 » 新聞資訊 » 行業動態 » 塑料周轉箱為什么會發脆?

    塑料周轉箱為什么會發脆?

    文章出處:   責任編輯:   發布時間:2016-11-26 10:20:00    點擊數:-   【
        塑料周轉箱箱為什么會發脆?每個塑料周轉箱生產工藝和原料各有差異,商家選擇原料方面不仔細和工藝不精湛等方面都會影響周轉箱質量。詳細介紹塑料周轉箱發脆的原因。
    一、模具方面
     (1)澆口太小,應考慮調整澆口尺寸或增設輔助澆口。
     (2)分流道太小或配置不當,應盡量安排得平衡合理或增加分流道尺寸。
     (3)模具結構不良造成注塑周期反常。
    二、設備方面
     (1)機筒內有死角或障礙物,容易促進熔料降解。
     (2)機器塑化容量太小,塑料在機筒內塑化不充分,機器塑化容量太大,塑料在機筒內受熱和受剪切作用的時間過長,塑料容易老化,使制品變脆。
     (3)頂出裝置傾斜或不平衡,頂干截面積小或分布不當。
    三、原料方面
     (1)塑料周轉箱原料混有其它雜質或摻雜了不適當的或過量的溶劑或其它添加劑時。
     (2)塑料再生次數太多或再生料含量太高,或在機筒內加熱時間太長,都會促使制件脆裂。
     (3)塑料本身質量不佳,例如分子量分布大,含有剛性分子鏈等不均勻結構的成分占有量過大,或受其它塑料摻雜污染、不良添加劑污染、灰塵雜質污染等也是造成發脆的原因。
    四、工藝方面
     (1)機筒、噴嘴溫度太低,調高它。如果物料容易降解,則應提高機筒、噴嘴的溫度。

     (2)降低螺桿預塑背壓壓力和轉速,使料稍為疏松,并減少塑料因剪切過熱而造成的降解。

         550箱-賽普塑業周轉箱500-320箱-賽普塑業周轉箱

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