The quality standard of automobile large-scale plastic outside part was summarized. The forming mechanism of weld mark was analyzed.
介绍了汽车大型外观塑件的质量标准，分析了塑件熔接痕形成的原因。
The research showed that the structure of weld mark was connected with the material formulation, die mould of extrusion machine and parameters of processing technology.
研究发现，熔接痕的结构与材料配方、挤出机机头模具及加工工艺参数均有关系。
The research showed that the structure of weld mark was connected with the material formulation, die mould of extrusion machine and parameters of processing technology.
研究发现，熔接痕的结构与材料配方、挤出机机头模具及加工工艺参数均有关系。
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