For optimal performance, molding sand control must begin long before final mulling. Molding sand at shakeout can have wide variations in temperature, moisture content, and physical properties.
Hot sand leads to casting scrap, mixing inefficiency, material handling and environmental problems.
Precise control over final sand preparation demands that between shakeout and final mulling, the return sand is lowered in temperature and homogenized. The Simpson Multi-Cooler uniformly cools sand to optimal temperatures, accurately controls moisture to tight tolerances, and intensively homogenizes your return sand in a single, integrated process. The Simpson Multi-Cooler is designed as a continuous heat exchanger operating on the principle of evaporative cooling. In this simple but efficient system, inexpensive air and water are introduced into a mechanically fluidized mass of sand to achieve maximum contact of the cooling water, fluidizing air, and the sand grain surface - conditions for highly efficient heat transfer. The air is introduced into the sand mass through multiple outlets in the interior walls of the cooler.