This topic mainly aimed at the mold design of plastic lid. Through the analysis and comparison of the plastic product , the plastic injection mold was designed. This topic came from the technology capability of product, the structure of the mold embarks, the gating system, the injection molding system and the related parameter examination, the mold took shape the partial structures, the against system, the cooling system ,the injection molding machine all had the detailed design, at the same time , the processing craft of the mold were simply established. Through the entire process of the design indicated this mold can achieve the processing craft which the plastic lid requested.
Key words:plastic lid;plastic injection mold;the structure of the mold embarks;gating systerm; injection molding machine