Question
How do I output a shortened crease slot in a dieboard for a design that will be produced with a steel counter?
Answer
Crease shortening
A user can "shorten" a crease in a design when a steel counter is to be used for production. There are two values to consider: the Crease Channel End and the Crease Cutback.
Cutback values
The Crease Channel End is the amount the crease channel is offset from the panel edge. This ensures that the knife that cuts the perpendicular panels edge has a place to land and does not encroach into the crease channel.
The Crease Cutback is an additional value that the crease is shortened which allows a buffer to prevent cropping or cutting of the material as it compresses into the channel.
Using the above values, a crease channel would be created as follows:
Dieboard slot
0.16 (0.08 * 2 for each end ) to accommodate the channel ends and crease cutbacks.Crease Rule Options
- The user can decide to use creasing rule of the original length and have the top part of the rule cut back to match the total shortened crease. Use a Crease cutback bridge (B) of
0, that is no physical shortening of the rule.
- The user can decide to shorten the crease rule so that it does not meet the perpendicular cut. This can be done when the dieboard base plate is rigid and strong enough to accommodate such rule. In this case, the total shortening of the rule and the top are the same. Use a Crease cutback bridge (B) equal to the total crease shortening.
- The user can decide to shorten the crease rule so that it does not meet the perpendicular cut and the top is cutback. Use a Crease cutback bridge (B) equal to the crease channel end.
Rule output
Bridges
When the crease rule is physically shortened, that is, Crease cutback bridge > 0, ArtiosCAD keeps the original crease length intact and defines bridges on either end of the crease rule path.
Here is some DDES3 output. The red entry is the crease definition. The original length is 10. Note there are four custom bridges. The green entries are the end bridges which effectively shorten the rule. Note the length is 0.041 which is the Crease cutback value (B).
LINE MAIN 0 0 10 0 101 0 P2 2 0.1875LINE MAIN 10 0 10 15 101 0 P2 3 0.1875LINE MAIN 10 15 0 15 101 0 P2 2 0.1875LINE MAIN 0 15 0 0 101 0 P2 3 0.1875LINE MAIN 0 7.5 10 7.5 102 0 P2 -4BRIDGE C 0.00205 0.041BRIDGE C 0.25000 0.1875BRIDGE C 0.75000 0.1875BRIDGE C 0.99795 0.041
Here is a dieboard output. The area in green is the front bridge on the crease rule.
Top rule
| Article information | |
|---|---|
| Applies to | ArtiosCAD 12.1 and newer |
| Created | 08-Mar-17 |
| Last revised | |
| Author | GSY |
| Case Number | |