Wednesday, January 11, 2017

Why slippage occurs in cylinder die cutters?

Flatbed die cutter cut the full size of the sheet simultaneously. The cylinder of the cylinder die cutters roll above the material to be cut and the cutting made under the cylinder.

1. Die board
2. Steel rule die
3. Cylinder
4. Material to be cut
5. Section under cutting

Unfortunately, the cutting happens not at one point, but beside the cylinder a few millimeters.
Consequently the cutting force (F) is not perpedicular to the surface there is a longitudinal component (F2) as well. This force causes the longitudinal sliding effect of the sheet to be cut in cylinder die cutters.

This sliding effect and inaccuracy depend on

  • the thickness of the material to be cut
  • the material of the sheet to be cut
  • the diameter of the cylinder
  • the angle of the tool and cylinder
  • a lot of other circumstances