What is vacuum precision casting?

Release time: 2019-05-29

Vacuum precision casting is a casting process in which metals are smelted, poured and crystallized in a vacuum chamber. It can reduce the gas content in the metal and prevent metal oxidation and trachoma. Demanding castings can be produced in this way. The cost of vacuum casting is high, and it is generally used for high-quality castings, and the casting mold should not contain volatiles. Vacuum precision casting is to insert the mold gate (or liquid riser) into the molten metal, and then evacuate the mold to make the cavity of the mold become negative pressure. A liquid riser) rises and fills the mold, solidifies and forms, so as to obtain a casting method of castings.

The process principle of vacuum precision casting is to put the investment shell in the sealing chamber, the sealing chamber is lowered, the sprue is immersed in the liquid metal, and then the vacuum pump is started to evacuate the sealing chamber, and the liquid is cast at the same time. After the casting in the shell is solidified, the vacuum state is released, the residual metal liquid in the runner is returned to the furnace, and the vacuum casting casting is obtained by cleaning the sand.

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