Abstract: Structural features of injection moulds of rice cookers were investigated intensively, and then sixty sorts of special demoulding mechanisms were designed through classifying design methods aiming to the characteristics of demoulding mechanisms.A front mould ejector plate mechanism was designed on the basis of front cavity demoulding requirements for deep cavities and deep columns.Moreover, a two-stage compound ejection mechanism driven by two guide cylinders was designed by combination of simultaneous demoulding on two directions and side features.In addition, three types of side core pulling mechanisms driven by T groove lock blocks were designed according to the location of three side holes on the front and back mould.The final ejection of products was pushed out jointly by the slider-ejector rod and ejector.According to the requirement of automatic production for the mould, a six-plate bearing frame and relevant templating openingclosing logic control mechanism were designed.Experimental results indicated that design of these mechanisms and die structures were reasonable, and therefore, the automatic injection-molding production was well carried out.