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Injection Unit Shot Utilization and Capacity Check

Compare a molded shot with the injection unit rating to see how much shot capacity remains.

Example starting values are prefilled to demonstrate the calculation. Replace them with your measured, quoted, or job-specific inputs before relying on a result.

Inputs

Shot-capacity inputs

Range: at least 0.0

Use total molded shot mass, including discharged runner/sprue material when applicable. Enter the unit selected below.

Defaults to lb; converted to lb for comparison.

Range: at least 0.0

Enter the press maker’s rated shot mass on the same material-equivalent basis used for this comparison. Do not infer it from clamp tonnage.

Defaults to lb; may differ from required-shot unit.

Result

Remaining rated capacity (lb)
0.0120
Injection-unit mass utilization
0.80
Within entered rated mass capacity
Machine-fit limitation
Utilization compares required molded-shot mass with the entered rated capacity. “Within capacity” only means the mass comparison passes; confirm resin-specific shot-size convention, screw/barrel geometry, cushion, recovery time, injection pressure, and the machine manufacturer’s operating guidance separately.

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