1, bubble formation reasons
Bubbles are characterized by the formation of bubbles in the gauges of the die cast.
(1) mold temperature is too high or aluminum liquid temperature is too high.
(2) punching speed is too fast, metal flow into the gas.
(3) paint a large amount of gas, before pouring will not be completed, the gas was wrapped in the casting surface.
(4) die-casting process of poor exhaust or open mode too early.
2, to prevent the method
(1) cooling the mold to the operating temperature or correct the smelting process.
(2) reduce the punching speed, to avoid vortex charcoal.
(3) the use of small amount of gas coating, the amount of thin and uniform, completely volatile after the mold.
(4) clean up and add the exhaust slot or modify the opening time