Die cutting machine failure machine solution

1, carton die cutting machine indentation "burst" and "dark line"

The cause of the problem: "Breakout" refers to the fact that the pressure due to die-cutting indentation is too great and exceeds the endurance limit of the paper fiber, causing the paper fibers to break or partially break. "Dark line" refers to an indentation line that should not be present, generally Due to improper choice of die-cutting plate and indentation steel wire, improper adjustment of die-cutting pressure, poor paper quality, inconsistency between paper fiber direction and die-cutting layout, and low flexibility due to low moisture content of the paper.

Solution: Select the appropriate die-cut version; properly adjust the die-cutting pressure; place the print to be die-cut in the workshop for a period of time before die-cutting; increase the relative humidity in the workshop environment. The better method is to reduce the height of the indentation steel wire, the reduction height is usually 0.1 ~ 0.2mm, according to the quantitative determination of the paper, the amount of paper in the quantitative above 350g/m2 need to reduce the height of the indentation steel wire is 0.2mm Paper with a basis weight of 350g/m2 or less should be reduced by 0.1mm.

2. Die cutting and dusting

The cause of the problem: When die-cutting, the phenomenon that the die-cutting products are not smooth and fluffy often occurs, especially at the edges where cutting lines are closer to the indentation line. This is due to the fact that when the die-cutting and pressing are performed, the strips and the indentation steel wire on the die-cut plate exert a pulling force on the paper, and the paper is pulled when the paper is not completely cut, and a burr occurs.

Solution: First choose different types of die cutters based on the paper. Die cutting knife includes straight knife and horizontal knife. The two kinds of lines have high and low points. The lines and heights formed by the blade are different, and directly relate to the quality of die cutting and the service life of the die cutter. The straight knife is better than the horizontal knife in avoiding die-cutting; in terms of service life, the low front knife is better than the high front knife. When die-cutting coated paper jams, straight-line high-cutting blades should be used, and the cutting edge must be ground. It is better not to use a concave-convex molding process. If the pressure is too high, it will have a great impact on die-cutting; It is advisable to use a small knife for ordinary paper jams, and determine the pattern of the blade according to the quality of the paper fibers.

3, die cutting accuracy is not high

The reason for the problem: The reason for the low die-cutting accuracy is die-cutting, and there are print problems. Hand-made die-cuts have large errors; die-cutting indentations can cause paper distortions in contrast to the printing process's operating environment, resulting in inaccurate position of die-cutting indentations, especially after glazing and laminating. Serious, affecting die-cutting accuracy.

Solution: Select an advanced die-cutting platemaking process to improve the accuracy of the die-cutting plate. Make sure that the die-cut indentation is performed under the same working environment as the printing process, or that the operating environment is the same (ie, the same temperature, relative humidity, etc.); and the glazing and film-covered paper should be die-cut pretreated. Minimize the effect of paper deformation on die-cutting accuracy.