Casting hollow parts made of light alloys, comprises pouring a metal liquid into a mold having a core at its center, and filling and solidifying the core of the mold in which the metal enters and remains tight contact

摘要

The casting process comprises pouring a metal liquid (1) into a mold (2) having a core (3) at its center, and filling and solidifying the core of the mold in which the metal enters and remains tight contact. The metal enters and remains in contact with the multilayer core using a mixture of sand, resin and catalyst. The mixture is located in a surface near the contact area between the metal and the core, and the rest of the volume of core does not contain resin and allows to maintain the total pressure of liquid metal during mold filling. The casting process comprises pouring a metal liquid (1) into a mold (2) having a core (3) at its center, and filling and solidifying the core of the mold in which the metal enters and remains tight contact. The metal enters and remains in contact with the multilayer core using a mixture of sand, resin and catalyst. The mixture is located in a surface near the contact area between the metal and the core, and the rest of the volume of core does not contain resin and allows to maintain the total pressure of liquid metal during mold filling. Exhaust gas is generated inside the core. The amount of resin in the core section decreases gradually or in steps from the area of contact with the liquid metal.