Principle of vacuum precision casting process

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.  vacuum casting services 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 the mold is evacuated to make the mold cavity become negative pressure. The liquid riser) rises and fills the mold, solidifies and forms, thereby obtaining the casting method of the casting.

The process principle of vacuum precision casting is to put the investment mold into the sealing cavity, lower the sealing cavity, immerse the runner in the liquid metal, and then start the vacuum pump to evacuate the sealing cavity, and the liquid is released at the same time. After the casting in the shell is solidified, the vacuum state is released, the molten metal remaining in the flow channel is retued to the fuace, and the vacuum casting casting is obtained by cleaning sand. According to the pressure difference established by the vacuum casting process, vacuum precision casting can be divided into direct casting method and special vacuum method: