(1) When the pouring temperature is too high,
not only will improve the Flowability of molten metal,
but also the rapid oxidation of the liquid metal, which accelerates the oxidation of the occurrence of mechanical sticky sand.
The submerged pulse valve is installed in the air bag, has small resistance,
good Flowability, high injection quantity,
improves the load driving amount, and expands the use range of the air source pressure, and is suitable for use in a wide air source pressure.