座椅塑件开裂问题的解决

Solution of Cracking Problem on Injection Molded Chair Parts

针对某座椅塑件的开裂问题,通过Moldflow软件模拟分析,发现塑件在原始工艺条件下呈现一定的向下挠度翘曲,最大可达1.6 mm,又经量化得出塑件厚侧边的磨砂皮纹对塑件的摩擦力可大于14 kN,推知工艺条件和模具结构是导致塑件开裂的原因,并通过优化工艺参数和改变原始模具结构,使问题得到解决。

For the cracking problem of chair parts, it was found that the injection molded parts naa the downward deflection warpage under the original conditions by the simulation analysis of Moldflow. The largest warpage reached 1.6mm. A quantitative calculation showed that the frictional force between the injection molded parts was greater than 14 kN. It was deduced that the process conditions and mould structure factor were the reason of cracks on the injection molded parts. Finally, by optimizing process parameters and changing the original mould structure, the problem was solved.