How to Make Large-Arc Bends Without Surface Whitening

A large arc needs a wider, evenly heated zone rather than one sharp hot line. Combining heating lanes and forming the sheet gradually helps the material follow the radius without concentrated stress.

1.Why it matters

The heated width should match the required curve. If the zone is too narrow, the bend becomes sharp and may whiten. If it is too wide or too hot, the panel can lose shape outside the intended arc.

2.Practical checklist

· Use a radius template or mold for repeatability.

· Heat evenly across the complete working length.

· Cool the part on the form before removing support.

3.Which machine fits?

Both models list a 10-70 mm bendable arc range. The Factory Bender is useful when the arc must be repeated with built-in or custom molds.

Frequently asked question

Can a straight-bend setup make a curve?

Yes, when lanes can be combined into a wider heating area and the part is formed around a suitable radius tool.

Always test a small offcut and follow the machine manual, material safety information and local rules.

Need help choosing a machine? Send us your material, thickness, maximum bend length and daily output.