Gravity casting equipment & process

Our foundry adapt both machine and manual hand mould to make gravity casting, just depend on the feature of products, for easy item with small QTY, we just use manual mould to cast the gravity casting(permanent mold casting), with this type of mould, the invest of tooling cost is much cheaper, for large and complicated casting part, we will make tooling/mould with automatic ejector pin to fix on the machine to make the gravity casting, which will greatly help the production output, but the tooling cost is a bit expensive compare to hand mould.