Controlling external cold iron manufacturing process having a strong cooling effect of solidification

The present invention relates to a method of controlling an external cooling solidification of iron have strong cooling effect, the casting comprising a matched cold iron, cold iron has a plurality of internal cavity, the internal cavity has a melting point lower than the low-melting metal casting, empty the port of the cavity is provided close to the melting point of the chill plug; process of manufacturing a cold iron having a strong external cooling solidification has control, comprising the steps of: casting according to production requirements, determine the number of external cooling of iron, size and thickness, cast iron and the cold reserved or processing chamber, a mass of the added low-melting metal in the cavity, stoppered and sealed cavity stopper. Iron, and outer cooling the manufacturing process using a strong cooling effect of the built-in way of the low melting point metal, iron rapid warming outer cooling time, so that the built-in low-melting metal melting endotherm, greatly enhancing the cooling heat absorption capability of the outer iron, thereby speeding up the majority of the cooling rate of the casting thickness, reduced shrinkage, shrinkage phenomenon occurs.