Die-casting die with center feeding full-periphery pouring gate and method

The invention provides a die-casting die with a central feeding full-periphery sprue and a method, the die-casting die comprises an inner sprue which is located in the center of the die-casting die and is a full-periphery sprue, a sprue bush arranged in the center of a fixed die set and a sprue spreader arranged in the center of a movable die set in a limited mode, and the sprue spreader and the sprue bush are used in cooperation to form the inner sprue. The flow gate is located in the center of the die-casting die and is a full-circumference gate, and the sprue spreader achieves automatic movement during die casting through an elastic device arranged in the movable die set and controls automatic closing and opening of the flow gate. The three-plate mold structure has the advantages that the three-plate mold structure center pouring mode is combined to guarantee the casting quality, the complex mold structure of the three-plate mold is avoided, the related problems of an off-shell mold can be solved, the thre