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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!

    他們都在搜:復配罐塑料水罐腌制桶藥劑桶化工儲罐

    塑料水箱批發
    當前位置: 首頁 » 賽普新聞中心 » 新聞資訊 » 賽普資訊 » 塑料注塑技術詳解

    塑料注塑技術詳解

    文章出處:   責任編輯:   發布時間:2016-12-05 10:24:00    點擊數:-   【

        塑料注塑成型加工前,塑膠必須被充分的干燥。含有水分的材料進入模腔后,會使制件的表面出現銀絳狀的瑕斑,甚至會在高溫時發生加水分解的現象,致使材質劣化。因此在成型加工前一定要對材料進行預處理,使得材料能保持合適的水分。

        對于入門級別的同行道友們來說,這份注塑參數詳情表是一個不錯的記憶方法,


    對于專業人士來說,隨身攜帶,方便記憶,簡單高效。

       專業術語解析:


    1.注塑壓力


    注塑壓力是由注塑機液壓系統提供的,液壓缸的壓力通過注塑機螺桿傳遞到注塑熔體上,塑料熔體在壓力的推動下,由噴嘴進入模具的主流道,經過繞口注入模具型腔,壓力是為了讓熔體能按流程注入型腔并保證填充完整。


    2. 注塑時間


    合理的注塑時間對于塑料熔體的填充是由幫助的,注塑時間一般大約是冷卻時間的1/10左右。具體要按不同的注塑材料來定。


    3. 注塑溫度


    注塑溫度是影響注塑壓力的重要因素,注塑溫度必須控制在合理的范圍內,溫度太低,原料塑化不良;溫度太高,原料容易分解。所以溫度的控制是需要有經驗的老師傅來合理的控制的。


    4.保壓壓力與時間


    在注塑快要結束的時候,螺桿停止轉動,只是向前推進,進入保壓階段。保壓過程中噴嘴不斷的想型腔補充原料熔體,以保證制品成型后的完整度。保壓壓力一般是填充最大壓力的80%左右,根據實際原料和制品的要求來定。


    5.背壓


    背壓是指螺桿反轉后退儲料時所需要克服的壓力。高背壓有利于色料的分散和塑料的融化。  

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