Gravity casting machine is an indispensable machine in the gravity casting process. Due to its large size and weight, it is difficult to maintain the whole machine. Manufacturers should pay attention to its daily maintenance and reduce the possibility of mechanical equipment maintenance. Gravity casting machines are used every day perform these tasks.
Before using the gravity casting machine, the machine must be lubricated to keep the parts in normal use. It is also necessary to clean the gravity casting machine to avoid abnormal operation of the gravity casting machine due to excessive dust. Regularly check the components of the gravity casting machine, If serious damage and wear are found, it should be replaced in time to avoid affecting normal production.
The molten aluminum in the raw material furnace of the gravity casting machine should also be treated regularly. The slag and oxygen removal in the furnace should be done well, and the alumina on the furnace surface should also be cleaned regularly. During the use of the gravity casting machine, the gravity casting machine should be checked every day and maintenance, which can not only ensure the stability of mechanical equipment in use, but also discover potential hidden dangers of the machine during maintenance.
Common Problems in Aluminum Alloy Gravity Casting
keep cold
(1) Reasons: (1) The temperature of the mold is too low and the exhaust is poor; (2) The pouring speed is too slow, there may be continuity, the planning of the gating system is unreasonable, and there are too few gates; ③The planned wall thickness of the casting is too high Small, possibly short but necessary rounded corners.
(2) Treatment method: (1) Move the mold temperature, reasonably set the ventilation slot or exhaust plug to make the exhaust unobstructed; (2) Appropriate movement and pouring speed, discontinuous, reasonably increase the number of gates; ③ Appropriately increase the plan Wall thickness and rounded corners.
Stomata
(1) Reasons: (1) The pouring speed is too fast, and the pouring temperature is too high; (2) The exhaust is not smooth, and the exhaust volume may be too large; ③The melting temperature is too high.
(2) Treatment method: (1) Reduce the pouring speed, properly reduce the pouring temperature, and pour smoothly; ②Control the exhaust volume to make it appropriate; ③Strictly control the melting temperature to prevent the temperature from being too high.
3
(1) Reasons: ①The aluminum liquid is not stirred sufficiently before pouring, and the temperature is too high during pouring; ②The coating is uneven and may be too thick.
(2) Treatment method: (1) Before pouring, the aluminum liquid should be fully stirred evenly, and the pouring temperature should be appropriately reduced. ②Appropriately reduce the wall thickness of the casting to shorten the solidification speed of the coating.
