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    4. 保險杠材料的選擇原則

      來發布于:2018/6/13 9:48:21

        汽車外飾件是汽車零部件中應用塑料材料最多的零件系統,主要包括保險杠、后視鏡、燈、門把手、進氣格柵、天窗等。
        現代轎車外飾件一般多采用注塑工藝成型,再進行噴漆或皮紋處理。作為噴漆件,為保證與車身顏色及漆面質量的一致,在選材時必須考慮噴涂系統,例如北美車身油漆多采用高溫烘烤系統,外飾件選材時應考慮選擇可耐高溫烘烤的原料;作為皮紋件,在選材時須特別考慮原料的顏色及耐候性能是否滿足設計要求。
      保險杠材料的選擇原則
        保險杠一般采用噴涂處理,長期受到風吹、日曬、雨淋,在碰撞時首當其沖,工況惡劣,所以其材料有以下要求:
        1、良好的抗沖擊性能:碰撞時有良好的彈性,為乘客提供保護;
        2、良好的耐候性:防止在高溫暴曬下變形、老化等;
        3、良好的油漆附著能力:保證油漆不能脫落、變色;
        4、良好的流動性:滿足注塑加工工藝的要求;
        5、良好的加工性能:便于注塑模具設計;
        6、價格相對低廉:保險杠材料用量大,可以有效降低使用成本。

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