Abstract: Double-shot molding technology is developed in recent 10 years, It′s one of the core technology of innovative significance in injection moulding field.it was invented and widely used, to write a new chapter for plastic products. This paper introduces the double-shot mold for mouse cover and the design experience and skills. There two feed system, One is pin point gate and other is submarine gate. The last channel of PC melt is molding by the auxiliary core. Mold side core-pulling mechanism is very complicated, which is composed of a slider in fixed mould and a angle ejector rod in movable mould. Water channel of mould layout equilibrium, guiding and positioning system is safe and reliable, It is a classic example of double-shot mold.

Key words: mouse cover;double-shot molding, double-feed system, auxiliary core, side core pulling mechanism, given-distance parting mechanism