The problem of die-cutting and easy-to-tear opening is not easy to tear

Die-cutting is an important process in the carton printing process. The quality of die-cutting directly affects the final carton forming process. As for the problems of the burrs and tearing of the printing factory during the die-cutting process, we specifically interviewed some printers and suppliers and asked them to talk about the causes and solutions to this problem.
Die-cutting problems

â—† Jiangsu Dadong Group Xuzhou Huayi Color Printing Co., Ltd.

The reason is that the die cutter is not fast or the knife is not aligned with the bottom stencil.
Solution: Replace with a new die cutter and check the alignment of the knife and the bottom stencil.

â—† Bobst Group Shanghai Co., Ltd.

Cause: The die cutter is not sharp enough, or it may be that the hardness of the rebound rubber on both sides of the knife is not enough. When the blade cuts into the paper, the paper cannot be fixed so that the blade cannot be trimmed and the paper is produced.

Solution: If the new tool plate is blunt, in addition to the possible causes of the device itself, it is also possible that the operating pressure is set incorrectly, and the pressure is too high to shorten the tool plate life.

Easy to tear the problem of tearing

â—† Jiangsu Dadong Group Xuzhou Huayi Color Printing Co., Ltd.

Reason: Joint point is too big

Solution: The joint point should be made to be the best under the circumstances that the sheet is continuously opened at the time of starting, and the position of the joint point should be distributed in a straight line with the direction of paper feeding, so that the sheet is not stretched diagonally in the die-cutting work of the machine. The joint point is not easy to pull off, the joint point can be the smallest, tear the mouth when tearing the box is easy to tear open.

â—† Bobst Group Shanghai Co., Ltd.

Cause: die cut does not cut through

Solution: First check the quality of the cutting plate. If the quality is acceptable, the height of the cutting line is the same, and the cutting edge is sharp, then the next step is to check whether the die-cut paper has been cut through, and if so, it is necessary to make up the pressure. If there is no cut-through part, it means that the pressure is not enough, and the pressure of the equipment can be adjusted to partially cut through, and then the ideal die-cutting effect can be achieved through pressure compensation.

In response to the above two issues, Jiangsu Unicom Sanbaoulin Printing Co., Ltd. believes that these problems are mainly caused by the knife mold. When the printing plant uses automatic stripping machines, the steel knife mold is better than the wood knife mold. If there is a problem with burrs and tearing, check whether the knife edge is sharp and the pressure is too light. (Text / Yang Hao)