相關標簽：美國Nycoa PA66、德國雷曼福斯 PA66、美國ARC PA66塑膠原料、均衡的 PA66、層壓法 PA66、高比重 PA66塑膠原料
尼龍66注塑工藝:
聚酰胺纖維通常稱為尼龍，簡稱PA，是一種半透明或不透明的乳白色結晶聚合物，無毒無味，具有良好的熱塑性，輕質和韌性，高拉伸強度，抗壓強度以及對杰出疲勞性能的抵抗力，摩擦系數小，耐磨性，耐腐蝕性，耐候性，對生物侵蝕的惰性，良好的抗菌和抗真菌能力以及良好的電絕緣性。缺點是容易吸水并且耐光性差。PA是一種自熄性塑料，燃燒時會燃燒，散發出羊毛或指甲的味道。密度為1.15g/Cm3。PA的收縮率在1％至1.5％之間。添加玻璃纖維添加劑可將收縮率降低至0.3％。尼龍部件重量輕，易于染色和形成。由于它們的低熔體粘度，它們可以快速流動，并且易于填充。填充后的凝固點很高，并且可以快速成型。因此，成型周期短并且生產效率高。烘干。在100-110°C干燥4小時以上。模具澆口和流道。由于尼龍的凝固時間很短，因此澆口的位置非常重要。澆口直徑不應小于0.5xT，其中T是塑料部件的厚度。如果使用熱流道，則澆口尺寸應小于常規流道，因為熱流道可防止材料過早固化。如果使用浸入式澆口，則澆口的最小直徑應為0.75mm。模具溫度。模具溫度控制在80-90°C。對于薄壁，長流量的塑料零件，也使用較高的模具溫度。升高模具溫度可以提高塑料零件的強度和剛度，但會降低韌性。如果壁厚大于3mm，建議使用2O-4O℃。對于玻璃增強材料，較低的模具溫度大于80°C。燈管溫度。230°C至28°C，增強品種為25°至28°C。注射壓力力。尼龍溶液的粘度低，流動性好，但凝結速度快，形狀復雜，壁薄的產品容易出現問題。因此，需要更高的注射壓力，尤其是對于玻璃纖維。通常，壓力過高，并且產品會出現飛邊問題。如果壓力太低，則產品會有波紋，明顯的氣泡和焊接痕跡或產品不足。大多數尼龍品種的注射壓力不超過120mpa，通常在60至100MPa的范圍內。選擇是為了滿足大多數產品的要求。只要產品沒有缺陷如氣泡，通常就不希望使用較高的保壓壓力以避免增加產品的內部應力。注射速度。對于尼龍，注射速度很快，可以防止由于冷卻速度太慢，模具填充不足而引起的波紋，并且快速注射速度不會影響產品的性能。使用再生材料。最好不要超過三倍，以免引起產品變色或機械和物理性能急劇下降。施加量應控制在25％以下，過多會導致工藝條件波動。再生材料在與新材料混合之前必須先干燥。停止機器時，應排空螺釘，以防止在下一次生產中扭曲螺釘。 。以上文獻若需轉載請備注出處：PBT樹脂 //shanglikaiguan.cn/
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