Ingot Mold Volume to Metal Weight: Plan the Pour by Density
Quick answer
Estimate ingot mass as cavity volume multiplied by the chosen density and planned fill fraction. Use consistent units and label the result calculated. Actual mass changes with alloy composition, cavity geometry, freeboard, shrinkage, meniscus, residue, and incomplete fill, so validate with a controlled pour.
The same mold holds different masses
A mold advertised as “1 kg” is incomplete without the reference metal and fill method. Dense precious metals can weigh several times more than aluminum in the same cavity.
| Decision point | What it means | Control or limitation |
|---|---|---|
| Cavity volume | Measured water displacement, geometry, or CAD | Method and uncertainty |
| Density | Exact alloy and temperature basis | Do not use color or generic metal label |
| Fill fraction | Planned volume below rim | Preserves handling margin |
| Calculated mass | Volume × density × fill fraction | Planning value only |
| Measured ingot | Cooled mass on identified scale | Validation result |
Create a mold card
- Record mold supplier, material, cavity dimensions, taper, and ID.
- Calculate volume in one unit system and show conversions.
- Use alloy-specific density from an authoritative source.
- Define freeboard and maximum working fill through an approved procedure.
- Record actual poured and final mass and update the planning factor.
What real users ask
Buyers frequently ask whether a crucible can fill a mold labeled in ounces or kilograms. The answer requires both metal-specific crucible capacity and mold volume.
The supplied 607-review dataset is used here only to identify recurring question patterns. It does not establish specifications, frequency, causation, or universal performance.
Safety and limitations
Do not use water displacement on a mold unless it can be dried completely under an approved method before molten-metal service. Moisture and molten metal are an explosion hazard.
Exact ToAuto models and revisions remain separate.
Capacity is metal-dependent.
The controller display is not automatic proof of bath temperature.
No unresolved maximum-temperature value should be used to justify a process.
Frequently asked questions
Can I use pure-metal density for an alloy?
Only as a labeled rough estimate; use the actual alloy value when accuracy matters.
Why is the finished ingot lighter than calculated?
Freeboard, meniscus, shrinkage, residue, spill, incomplete fill, and measurement error can contribute.
Should I fill an open mold to the rim?
No universal rule supports that. Use a validated fill limit and stable pour control.
Bottom line
Buy molds by cavity and workflow, not an unexplained kilogram label. Calculate for planning, then validate with measured mass.
