Description
The cooling process is based on the evaporation of the residual moisture of return sand and on the evaporation of the water appropriately added by a conditioning device, which is made up of two parts: one part adds water into the charging area (according to incoming temperature) and the other part adds water into the sand discharge area, if necessary. Vapor and fines due to process are removed by a suction and filtering system. Besides easing castings cleaning and core emptying, the rolling of castings and sand inside the drum homogenizes return sand and consequently reduces mull time. At the end of the process, clean and cooled sand and castings pass through a screen which carries out a separation.Advantages
Castings cooling: Castings come out at the same temperature as the sand and can immediately be handled doing without intermediate warehouses.
Castings cleaning: The rolling of castings and sand inside the drum eases castings cleaning and core emptying and consequently reduces sandblasting times.
These results are achievable thanks to the automatic control of water addition into the drum.
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