Die - casting molds consist of two parts, the covering part and the moving part respectively. In hot chamber die - casting, the cover part has gate, while in cold chamber die - casting is injection port. Molten metal can enter the mold from here, and the shape of the site matches the shape of the injection nozzle in hot chamber die casting or the injection chamber in cold chamber die casting. The moving part usually includes a push rod and a runner. The runner is the channel between the gate and the cavity through which molten metal enters the cavity. The covering part is usually connected to a fixed platen or front platen, while the movable part is connected to a movable platen. The cavity is divided into two cavity insert blocks, which are independent parts that can be removed or installed relatively easily through bolts.