Who said that smartphones are all made of magnesium alloy? You may have been cheated by the manufacturer. Magnesium alloy injection molding machine is used for automobile and motorcycle parts, because the workpiece produced by magnesium alloy injection molding machine will have fewer pores. But the cost is high, because he needs to make magnesium alloy ingots as raw materials like plastic particles first, and then bake them before entering the hopper and being squeezed into the mold cavity like a screw. At present, magnesium alloy hot chamber machine is the most widely used hot chamber machine. Due to the high die-casting speed of the hot chamber machine, magnesium alloy ingots can be directly put into the furnace, melted into soup and injected into the mold cavity, so thin-walled workpieces can be die-cast with relatively low cost. There are also manufacturers who use the cold room machine, but the cold room machine is not suitable for the exterior decoration of the mobile phone, because the magnesium alloy soup is oxidized by air after melting, and the cold room machine is not enlarged in the mode-locked mode, so the interior decoration of the mobile phone can still be used. As for the process after die casting and injection molding, it is the same.