Abwicklungsrechner für Trichter / Bunker

Measure inlet and outlet at the theoretical fold lines, not across an existing flange. A centered hopper develops into two matching pairs of trapezoids.

Worked example: a 700 by 500 mm inlet, 200 by 150 mm outlet and 600 mm vertical height gives true panel heights of 625.0 mm and 650.0 mm. Check the PDF calibration square before transferring the outline.

The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.

Hopper inlet width

700 mm

Hopper inlet depth

500 mm

Outlet width

200 mm

Outlet depth

150 mm

Vertical height

600 mm

Edge allowance

15 mm

Primary result: Wide-face true height: 625.00 mm.

• Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
• Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
• When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.

This supports centered rectangular inlet and outlet geometry. It does not determine capacity, flow angle, material gauge, stiffeners, bend deduction or weld details. Make a test panel when finished dimensions are critical.