Ceramic-Wax Mixtures


Major supplier of automotive electrical parts. The new dryer takes a wet feed with 10% free moisture and discharges a uniform granular mixture with less than 0.3% moisture. Drying temperatures are carefully controlled to prevent melting the binder while drying the shortest possible time. An inter-esting design modification for the new dryer is the "D-breeching" fitted to the roof. This attachment extends the roof of the area of the exhaust flange, thus minimizing turbulence and reducing dust carryover. By preventing caking during the drying stage, the dryer avoids the needed for further processing before molding and sintering. The dryer is ideal for blended feeds because the components of the blend remain well mixed. The low vertical air velocity also results in lower dust carryover than most continuous dryers. The dryer can easily handle unplanned changes in feed rate because the essential drying parameters of temperature, layer depth and transfer frequency remain unchanged. Prior to implementing the new dryer, drying at the automotive parts facility was accomplished by manually spreading a bed of material on the drying trays and loading them into a static oven. The product suffered from non-uniformity due to over-drying at the top of the bed and underdrying at the bottom of the bed. The new dryer offers reliability and low maintenance for the automotive parts facility. The dryer runs 24 hours per day, 7 days per week and is only shut down for scheduled maintenance when the entire plant is closed.


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