Iron is used to increase the counterweight to balance the weight of its own weight, is the shot-blasting machine to meet certain requirements melting and pouring the liquid into the mold, the solidification by cooling, obtained after clearing of a predetermined shape, size and performance casting process. counterweight iron is the foundation of modern machinery manufacturing industry is one process. counterweight iron is used to increase their weight to maintain balance of weight, shot peening machine is melting into liquid and meet certain requirements poured into the mold, the solidification by cooling, clearing of treatment to get a predetermined shape, size and performance of the casting process. counterweight iron is the foundation of modern machinery manufacturing industry processes one with heavy rail is more widely used in small household appliances, toys and other fields. these areas with heavy rail of some in order to maintain their center of gravity balance and stability, while others are the product itself to compensate for the weight is too light to play the role of adding weight and feel, while those areas with heavy rail is sometimes applied A more reasonable design choice and a more economical method of application.