US Patent 7823622 Ejection and stamping device

An ejection and stamping device is arranged at one side of an upper die of a vertical die casting machine and include a base on which first and second pistons are arranged. The first piston is coupled to a stamping board, while the second piston is coupled to an ejection board. When a casting of a die casting process is not completely solidified, the first piston drives the stamping board to carry out a localized stamping operation of a portion of the casting and then the second piston is operated to drive the ejection board for ejecting out the casting. In this way, local density and strength of the casting are enhanced and the product quality of the casting is notably improved.