Abstract: A large volume double-layer injection mold was designed for refrigerator spacers. The various parts, gating system, side core-pulling mechanism, cooling system, guide positioning system, opening mechanism, and ejection system of the mold was studied. By employing a hot runner gating system and a mold opening mechanism of gear and rack, the designed mold was well met the requirements for the quality and molding cycle of the refrigerator spacers.

Key words: refrigerator spacer, large and double layer injection mold, hot runner system, rack and pinion mould opening mechanism