Brief Discussion of the Natural Sand Molding Process

As a matter of chronology, let me take a brief discussion on the Natural Sand Molding Process.

Natural Sand is still being used for green sand molding process. This is especially true for foundry without any sand treatment facilities, in which case no other molding materials can be used. As a matter of fact, given the copper base alloy and aluminum base alloy, the foundry can immediately makes use of the natural sand. The result of iron casting and steel casting using natural sand is not satisfactory to the foundrymen because of its poor quality and dimensional accuracy.. Hence, the necessity of adopting the synthetic sand. Even from the historical point of view and considering the most important technique used for the green sand mold, the adoption of the synthetic sand to replace the natural sand had greatly improved and modernized foundry.