The cleaning of castings is very heavy work, and its workload is often 10 to 15 times that of die casting. Therefore, it is very important to realize the mechanization and automation of casting cleaning work with the increase of the productivity of the die casting machine and the increase of the output.

1) Cut off the gate and flash
The equipments used to remove gate and flash are mainly punch presses, hydraulic presses and friction presses. Under mass production, special molds can be designed according to the structure and shape of the castings, and the cleaning task can be completed on the punching machine at one time.
2) Surface cleaning and polishing
Surface cleaning mostly adopts ordinary polygonal roller and vibration buried cleaning device. For simple and small pieces with small batches, a polygonal cleaning roller can be used, and decorations with high surface requirements can be polished with a cloth or leather polishing wheel. For mass-produced castings, a screw-shell vibration cleaning machine can be used.
The cleaned castings can also be surface treated and impregnated according to the requirements of use to increase gloss, prevent corrosion and improve air tightness.