Injection-molding device and method for manufacturing parts made of metallic glass

A device for injection molding a metallic alloy, intended for manufacturing at least one part comprising an amorphous metallic alloy, said device comprising:

• an injection mold delimiting a cavity that has a receiving face and a frontal molding face opposite the receiving face,
• at least one sacrificial insert, placed in said cavity and having a rear face, at least one contact zone of which is adjacent to at least one contact zone of said receiving face of the cavity and a front face located opposite said molding face of the mold and provided with a recessed shape,
• a molding impression corresponding to space left free in the cavity comprising the sacrificial insert, and
• an injection piston movable in a chamber of the mold, which communicates with the molding impression;
• wherein the molding impression is configured so that a diameter of geometry spheres inscribed in said molding impression and having at least one point of contact with the sacrificial insert is no more than one and a half times (1.5 times) a critical diameter of the metallic alloy, optionally no more than one and two tenths times (1.2 times) the critical diameter of the metallic alloy, or no more than one time (1 time) the critical diameter of the metallic alloy.