GRINDING ADVICE FOR CUE ANVIL COVERS
GRINDING TOO MUCH CAN CAUSE TOO LOSE COVERS ON THE CYLINDER.
DO NOT GRIND NEW COVERS BEFORE DIE-CUTTING ON THEM!
The frequency of grinding is often determined by the people who work with the machine; they are the experienced experts that know how to handle the machine to optimize its performance.
However, what needs to be die-cutted always plays a major role: the complexity of the die-cut (the form) and also the type or quality of the cardboard greatly affects the machine’s performance.
Regarding the combination of C.U.E. Europe’s anvil covers and a Grinding system, it is our experience that this system performs better in combinaton with our anvil covers than with other brands of anvil covers.
You might wonder why we repeatedly stress the fact that one must not grind all of the fiber out of the covers; watching the video at the bottom of this page will show you the reason why we emphasize ‘the art of not grinding too much’. The fiber is more than important for a cover to properly fit around the cylinder. The fiber in the urethane is indispensable for keeping the covers tight on the cylinder. No or not enough fiber in the cover will loosen the cover during the process and that goes for any anvil cover on any machine in the world.
In many cases we advice users to grind the covers 3 or 4 times less than they normally did to see results changing in a positive way. At the end of the day, finetuning will identify the optimal machine operation.
NThe steel lock bar prevents die cut quality problems at the weak spot.
NThe die cut surface is also harder. With cheaper versions this is usually softer, which in turn results in a poorer die-cut result.
NWith a Grinding system, rotation is no longer necessary (the surface remains flat over the entire width), so more production uptime and lower maintenance costs.
NIn addition, the Grinding system ensures that after every grinding the diameter of the die-cut cylinder is automatically measured and the speed of the cylinder is adjusted. This maintains the correct speed of the die-cover surface. In other words, the Grinding system controls the die-cylinder speed according to the thickness of the anvil cover. In this way we can guarantee a consistent surface size during the lifetime of the anvil cover (tolerance +/- 1 mm).