What is a sand mold?

it's the kind of mold that is cast! For example, buckle the pot on the sand, then cover it with sand and compact it. Then carefully pick up the upper touch. Carefully take the pot away, then buckle the upper touch and the lower touch, and pour molten iron or aluminum water into it. After cooling, a pot will be made. This is the traditional sand turning process. The tools are very simple!