Page 20 - Module DMV20173

2.0 CASTING PROCESSES

Figure 3.9 (a) The bottom-pressure casting process utilizes graphite moulds for the
production of steel railroad wheels. Source: The Griffin Wheel Division of Amsted Industries
Incorporated. (b) Gravity-pouring method of casting a railroad wheel. Note that the pouring

basin also serves as a riser. Railroad wheels can also be manufactured by forging.

Think

Why does casting processes can produce the smallest cast parts?

Casting processes can produce the smallest cast parts because of :
 most of the car parts made from metal and casting processes is suitable with metal

processing;
 high pressures involved in some casting processes such as vacuum casting, pressure
casting and die casting which is suitable to produce small product with intricate shape.

BPLK 52 DMV 20173