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具有薄壁多孔特征的塑件,在注塑过程中容易产生翘曲和缩痕等缺陷,而通过选用合理的工艺参数,可以大幅降低这些缺陷的影响,从而生产出合格的产品。以一款老人塑料手机外壳为例,通过正交实验对手机外壳进行了注塑模拟实验,得出不同实验因素对缩痕指数和翘曲变形量影响的主次以及显著程度,再通过极差分析和方差分析,并利用综合平衡法确定最佳的工艺参数组合,经实际生产检验,成型工艺参数的优化效果良好,对薄壁多孔类塑件的注塑成型具有重要的指导意义。
Thin-walled porous plastic parts, in the injection molding process prone to warping and sink marks and other defects, and through the use of reasonable process parameters, you can significantly reduce the impact of these defects to produce qualified products. Taking an old plastic cell phone case as an example, the mobile phone case of the old cell phone was simulated by orthogonal experiment, the main order and the significant degree of the influence of different experimental factors on the denting index and warpage were obtained, and then the difference analysis And variance analysis, and the use of integrated balance method to determine the best combination of process parameters, the actual production test, molding process parameters to optimize the effect of good, thin-walled porous plastic injection molding has important guiding significance.