Cutting errors
As average error in industrial as well as in the manual is Bookbinding a poor section of book blocks , brochures or folded products referred to.
causes
Cutting errors are u. a. due to the wrong choice of the knife bevel angle, a wrong setting of the pressure, too high selected cutting stacks or blunt knives.
Individual cutting errors
Overcut
When overcutting, the knife is pushed away and gives way to the front, so that the lower arches become longer and are cut off more than intended.
Undercut
An undercut occurs when the knife is pulled into the stack and then the lower sheets become shorter and less cut off than intended.
Hollow cut
Due to uneven pressure along the cutting line, which can be caused by wavy clippings, the sheets are shorter in the middle than on the sides.
Oblique cut
The product to be cut is not cut at a right angle due to a faulty or imprecise system (alignment at the stops) .
Notched cut surface
The knife has become jagged due to material being cut that is too hard, foreign bodies in the pile or a knife steel that is too hard and then cuts uncleanly. This means that after the cut, the cut edge has nicks just like the knife.
literature
- Dieter Liebau, Inés Heinze: Industrial bookbinding. 3rd revised edition. Verlag Beruf + Schule, Itzehoe 2010, ISBN 978-3-88013-679-3 .
Individual evidence
- ↑ Dieter Liebau, Inés Heinze: Industrielle Buchbinderei, 3rd reviewed edition, Verlag Beruf + Schule, Itzehoe 2010, ISBN 978-3-88013-679-3 , p. 57ff.