Die-casting forming system for metal piece

The die-casting forming system comprises an upper die with a cavity, a lower die with a core, a sprue spreader connected to one end of the lower die and a sprue bush connected with the sprue spreader, an opening in the upper end of the sprue bush is connected with a die-casting machine, and the lower end of the sprue bush is connected with the sprue spreader in a penetrating mode. The lower surface of the lower die is fixedly connected with a first cap body, the lower end of the first movable column is embedded into the first cap body, an elastic assembly is arranged on the first movable column in a sleeved mode and located between the lower surface of the first flange part and the first cap body, and the elastic assembly is formed by stacking a plurality of elastic pieces in a staggered mode. The problems of forming defects and the like of the front end of the part caused by insufficient pressure due to the fact that the front end of the part is too far away from a die casting liquid inlet can be solved, and