Why the sand castings is not as good as Precision CNC metal mold castings
Precision CNC metal mold casting is usually made of high dimensional accuracy, good appearance, At the same time the Precision CNC metal mold casting is easily cooled.so that the castings internal organization is relatively fine, good mechanical properties. Sand castings are usually maked by handmade wooden mold, and the casting dimensional accuracy is relatively low, and also the sand fire resistance is low, It has led to the casting surface is rough, but sometimes if we want to reduce the costs,we still have to produce varieties of small quantities of castings.
