In order to improve the performance operation for various aluminum castings

a multi-functional counter-gravity casting device for aluminum alloy was developed. Key structure of the device consists of two sealed-in jar

i. e. the upper jar and the nether one

in which fuzzy algorithm treated integral-separated PID is taken as control project of the control system

and combined valve controlled by digital signal is adopted as the executive unites of the pneumatic system. Three counter-gravity castings methods including low-pressure casting

differential-pressure casting and vacuum-assisted pressure casting can be accomplished by combining the control system with the main body of equipment

improving the practicability of the counter-gravity casting equipment.