Green sand casting casting clay weight from a few kilograms until decades kilograms, machine tool lathe bed and clay dry type of casting production can be weighed dozens of tons.

As the large castins, lathe bed castings must be subjected to heat treatment in order to improve the performance itself, and improve the intrinsic quality of iron castings.

For example is also a large machine tools such as casting production lathe bed, generally USES the method of cores modelling, don't make shape and sand box, in the pit of cores in;