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Lost Foam Metal Casting Technology by Jayshree Machines And Tools
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Green Sand Versus foamcast Lost Foam Metal Casting Technology

PropertyGreen Sand CastingFoamcast Metal Casting Technology
Complex Internal Features and Part Consolidation.Complexity determined by sand core limitations, geometry, strength, and cost.Extensive and complex internal features (as thin as 3mm) available in foamcast, based on detail duplication and pattern assembly in foam.
Dimensional Tolerances+/- 0.030" is typical depending on part size, complexity, and geometry +/- 0.005"-0.010" is typical depending on part size, complexity, and geometry.
Surface Finish Capabilities250-600 microinches typical. Depends on grain fineness of sand.60-250 microinches typical. Depends on bead size and ceramic coating grain fineness.
Feature AccuracyCore movement and shift between mold halves across the parting line limit feature accuracy.No cores or mold halves to shift and degrade feature accuracy.
Parting Line and Draft AnglesParting lines and draft angles are necessary for molding.No parting lines in the mold and minimal draft on tools.
Environmental CostsSand recovery requires binder removal and time consuming sand clean-upSand is binder free, so it can be easily and rapidly recovered at low cost.
Tool LifeWear on wood and metal tools from sand abrasionLow wear and long life with aluminum tool

Process Video
Process Presenation
Process Cost
Equipment
V/s No Bake
V/s Sand Casting
V/s Lost Wax
V/s Chinese Process
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