Can produce complex shapes of parts, especially the rough lumen (such as heating) 2 wide adaptability, industrial metal materials can be cast. Several grams ~ hundreds of tons. 3 a wide range of raw materials. Low price. Scrap, scrap, chip 4 casting shape and size and parts are very close to reduce the amount of cutting, is a small non-cutting. Metal type because of good heat dissipation, fluidity of liquid metal must be worse, the other is also a large stress, thin-walled white easy to appear. Metal type can cast ductile iron, gray iron.