Casting device of large non-ferrous metal thin-walled structural component and casting method thereof

A casting device of a large non-ferrous metal thin-walled structural component, wherein a liquid outlet of the casting device is communicated with a casting sand box, and a pouring system and a mold cavity are communicated and are arranged in the casting sand box;

• the casting device comprises:
• an L-shaped liquid storage cylinder (10), wherein protective gas with a first gas pressure is inflated into a top of the L-shaped liquid storage cylinder (10);
• the L-shaped liquid storage cylinder is used for filling a molten metal stored in the L-shaped liquid storage cylinder into the mold cavity under a drive of the first gas pressure;
• a pressure supplying cylinder (20), wherein the pressure supplying cylinder (20) and the L-shaped liquid storage cylinder (10) are integrally connected;
• protective gas with a second gas pressure is inflated into a top of the pressure supplying cylinder (20);
• the pressure supplying cylinder is used for maintaining a pressure of and feeding the second gas pressure to the mold cavity that is wholly filled with the molten metal through a crystallization treater (30), until the molten metal in the mold cavity is solidified completely;
• wherein the crystallization treater (30) is provided with a grain refining mechanism for conducting micro-alloying treatment on the molten metal that flows through the crystallization treater, and comprises a crystal rise part (32) that is extended vertically upward or downward, and wherein a liquid inlet of the crystallization treater is communicated with the pressure supplying cylinder while the liquid outlet is communicated with the pouring system and the mold cavity;
• wherein the L-shaped liquid storage cylinder (10) comprises a vertical tube part (11) and an L-extension part (12);
• a first pas flow path is arranged at a top of the vertical tube part;
• a top wall of the L-extension part (12) and the pressure supplying cylinder (20) are integrally connected;
• the pressure supplying cylinder (20) is communicated with the L-extension part (12) through a first passage (21);
• and the pressure supplying cylinder (20) is communicated with the crystallization treater (30) through a second passage (22).