汽车仪表板骨架微孔发泡塑件的综合性能

为了研究微孔发泡在大型塑件中的应用问题,以汽车仪表板骨架塑件为例,利用Moldflow软件模拟分析微孔发泡注塑和传统注塑成型。结果表明,微孔发泡注射成型在注塑时间、注塑压力、体积收缩和翘曲变形等方面均好于传统注塑成型。通过对塑件泡孔形貌、密度、孔隙率、力学强度、表面粗糙度等性能的检测,研究微孔发泡实际应用问题。检测结果表明,微孔发泡能够有效实现产品减重,且产品力学性能优于传统注塑,但表面粗糙度较传统注塑差,汽车外观零件如采用微孔发泡成型须经过表面处理来改善表面缺陷。

Comprehensive Performance of Microcellular Foamed Plastic Parts of Automobile Instrument Panel Frame

In order to study the application of microcellular foaming in large plastic parts,with the automobile dashboard frame plastic parts as an example,Moldflow software was used to simulate and analyze microcellular foam injection molding and ordinary injection molding.The results show that microcellular foam injection molding is better than traditional injection molding in terms of injection time,injection pressure,volume contraction and warping deformation.The practical application of microcellular foam was studied by examining the properties of plastic foam,such as density,porosity,mechanical strength,surface roughness,etc.The results show that microcellular foam can effectively reduce the weight of the product,and the mechanical property of the product is better than that of traditional injection molding,but the surface roughness is worse than that of traditional injection molding.If the auto appearance parts are formed by microcellular foam,surface treatment must be carried out to improve the surface defects.