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注塑機廠家簡述注塑機螺桿有哪些材質呢?
來源:www.zzhwtt.com 發布時間:2021年05月26日

蘭州注塑機廠家簡述注塑機螺桿有哪些材質呢?大家知道如何選擇注塑機螺桿嗎?注塑機螺桿的材料都有哪些呢?什么樣的注塑機螺桿材料是實用且不易斷裂的?接下來帶大家了解一下注塑機螺桿材料的材質。


注塑機螺桿材料的材質:目前常使用的螺桿材料有45號鋼、40Cr、氨化鋼、38CrMOAl等。45號鋼廉價,加工機能好,但防磨耐腐化機能差。熱處置:調質HB220-270,高頻淬火HRC45-48。40Cr的機能優于45號鋼,但往往要鍍上一層鉻,以進步其耐腐化防磨損的功能。但對鍍鉻層要求較高,鍍層太薄易于磨損,太厚則易剝落,剝后進反而加快腐化,目前已較少應用。氮化鋼、38CrMoAl綜合機能比力優良,應用普遍。一般氮化層達0.4-0.6mm。但這種材料抵擋氯化氫腐化的本領低,而且代價較高。熱處置調質HB220—270,滲氮HRC>65。

注塑機

近年來,國外在螺桿的防磨耐腐化方面采取了一系列辦法。一種方法是采用高度防磨耐腐化合金鋼。如34CrAlNi、31CrMo12等。螺桿是注塑機的重要部件。它的作用是對塑料進行輸送、壓實、熔化、攪拌和施壓。所有這些都是通過螺桿在料筒內的旋轉來完成的。在螺桿旋轉時,塑料對付機筒內壁、螺桿螺槽底面、螺棱推進面以及塑料與塑料之間發生摩擦。


塑料的向前推進便是這種活動組合的結果,而摩擦發生的熱量也被吸收用來進步塑料溫度及熔化塑料。螺桿的布局將直接影響到這些作用的水平。因此,螺桿材料的黑白,直接影響到注塑機的機能,也直接影響到螺桿的壽命。目前的螺桿大都是進口國外的,并且可能是復合型材料。其匯層一旦呈現裂紋,就會造成整個螺桿報廢。而國產螺桿在擠制普通材料時表現還可以。一旦擠制有強度腐化性的產物時就不能滿足工礦的需求。

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