Injection mold can be divided into thermosetting plastic mold and thermoplastic plastic plastic mold according to molding characteristics; injection mold can be divided into transfer mold, blow mold, casting mold, thermoforming mold, hot-pressing mold (compression mold), injection mold and so on according to molding technology. The hot-pressing mold can be divided into overflow mold, semi-overflow mold and non-overflow mold by overflow mold. According to the pouring system, it can be divided into two types: cold runner mold and hot runner mold; according to the loading and unloading mode, it can be divided into two types: mobile type and fixed type.