Abstract: In view of the cracking phenomenon of refrigerator drawer in the process of high and low temperature testing with oil, takes the injection drawer of biomass filler composite material developed by our company as an example to explore the causes of cracking through material stress simulation analysis and CAE mold flow analysis. The results show that the main cause of drawer cracking is the inconsistent cooling rate of vertical support bars in the drawer and the surrounding area. The cooling part first forms the support structure, and the cooling slow part is constrained by the support structure during the cooling contraction, resulting in stress concentration cracking. The material stress simulation analysis results and CAE model flow analysis show that the stress concentration of the drawer can be effectively reduced after removing the vertical support ribs on the side of the drawer, so as to avoid the occurrence of cracks in the high and low temperature test of oiling.

Key words: Refrigerator, Biomass, Drawer, Cracks