Sand Casting Core Buoyancy & Cope Lift Calculator

Determine net upward buoyant forces on submerged sand cores, core print bearing stresses, and metallostatic vertical lifting force on the cope box.

Sand Core Volume V_core (in³):

Core Print Bearing Area (in²):

Cast Metal Alloy:

Core Sand Bulk Density (lb/in³): Standard silica sand ~ 0.058 lb/in³

Total Projected Parting Area (in²):

Cope Sprue Height H_cope (in):

Net Upward Core Buoyant Force:

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— N

Core Print Compressive Stress:

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— kPa

Total Cope Metallostatic Lift (F_cope):

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Required Cope Hold-Down Clamping:

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With 1.5x safety factor

Core Shift & Mold Runout Risk:

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