Sree sakthi equipments provides sand coolers. Return sand temperature, after the vibratory shake out in a mechanized green sand foundry is around 200°c. The temperature varies as the distance from the metal surface changes i.E the sand temperature is highest adjacent to the metal surface and lowest away from it. The sand to metal ratio and the holding time of metal in the mould decides quantity of heat to be removed . The return sand temperature at the inlet of the cooler after passing through conveyor is around 100°c. Mould of good quality and clean casting surface requires 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. Through the preparation holes fresh air is blown and at the same time water is sprayed on to the sand from nozzles located above the conveyor. Sand water mixed well is ensured by vibrations of the conveyor and turbulence caused by the air blown through. So that the water evaporates and the sand is cooled.
