Sand Cooler Dealers in Ernakulam

Return Sand Temperature, after the vibratory shake out in a mechanized green sand foundry is around ZOOGC. The sand temperature is highest arbacent to the metal surface and lowest away job it. The quantity of heat to be removed depends on the sand to metal ratio and the holding time of metal in the mould. The return sand temperature at the inlet of the cooled after passing through conveyor is around 1 OOOC. Mould of good quality and clean casting surface require well cooled sand.       Sand Cooling requires a continuous and uniform flow to achieve the uniform flow and compensate for irregular Sand supply the sieved hot return sand is stored in a surge hopper from there; a belt transports the hot sand to the cooling conveyor which is designed with a perforated bottom plate. Fresh air is blown through the preparation holes and at the same time water is sprayed on to the sand from nozzles located above the conveyor vibrations of the conveyor and turbulence caused by the air blown through ensure that sand water mix well so that The water evaporates and the sand is cooled. The belt, the cooling conveyor and the sand spraying unit are controlled by level indicators located in the surge hopper the plant operates only if the sand in the surge hopper is between the maximum and minimum level. Sand Moistening Sand temperature are measured at the entrance of the cooler and in the third stage of the cooler An electronic thermometer controls the amount of water sprayed in several steps. Depending on the values, measured, a variable Number of spraying nozzles is engaged or disengaged. This ensures exact dosage of the water required for cooling and moistening. The nozzle units are engaged automatically in steps depending on the sand temperature. Salient Features Cooling system ensure constant temperature and moisture to the return sand Low maintenance due to absence of moving parts. Quick cooling by double ejfect water and air cooling. Sand movement effected by the fluidization property of sand and vibratory motion Balanced draft system ensures negative pressure above the bed Environment friendly Benefits Substantial reduction in rejection of casting. Saving in conversion cost of rejected castings. substantial Saving in bentonite consumption  Excellent surface finish of casting Increased productivity No oolite formation occurs in mulling. Continuous online use of return sand Ease of maintaining permeability and hardness of the mould Saving in man power cost. Standard Models