Projected Area Calculator

Estimate total projected area for an injection mold. This practical tool is an engineering estimate—validate decisions against machine, material, mold, and process data.

Formula and method

Projected area is the shape seen normal to the mold opening, plus runner projection.

Inputs and units

Enter measured or specified values in the displayed units. Keep units consistent; results are rounded for practical planning. This first release uses the displayed engineering units rather than a unit-switcher.

Worked example

(120 mm × 80 mm ÷ 100) × 2 cavities + 12 cm² runner = 204 cm².

Use this at the parting plane

Projected area is the shadow of all cavities and runners normal to mold opening. It is the bridge between geometry and clamp-force planning.

What changes the result most

Actual parting-line geometry, cavity count, and runner layout. Use CAD projection for non-rectangular parts.

Common mistake

Using only a nominal footprint while ignoring holes, runners, or additional cavities.

Interpretation, assumptions, and limitations

This tool provides an estimate for planning and education. It does not replace machine maker limits, material data sheets, mold trials, cavity-pressure data, process validation, or qualified engineering review.

FAQ

Can I use this as a final production setting?

No. Confirm with validated process data and the applicable machine and material documentation.

Why can the real result differ?

Geometry, melt behavior, pressure loss, material lot, temperature, cooling layout, and operating practice can materially affect results.