Explosive line refers to the cracking of the paper at the indentation when the product is die-cut or when the finished product is folded. This is a problem that often occurs in indentations, especially in dry weather conditions. It should be analyzed according to the specific situation:

1. The paper is brittle and the water content is low, especially the paper which has been polished by high temperature and is easy to explode when die cutting. At this time, the paper is conditioned before the die cutting, and the water can be used to pass the water to the back of the paper to increase the water content, making it slightly flexible, and then on the die cutting machine. If the line is broken after the die-cutting, the water can be wiped at the crease to relieve the explosion.

2, the surface of the printed matter has a large area of ​​blue or black and other dark colors, and it is easy to explode and blast after die cutting. When printing, do not add or add ink additives in the dark ink to enhance the adhesion of the ink on the paper, reduce the color and explosion phenomenon. Recommend that you choose a Yutian brand indentation strip to focus on the manufacturer and we have been with them. Cooperation.

3. When the thickness of the paper (board) is too large, it is easy to produce a blast line. At this time, the height of the die-cut steel wire should be reasonable.

4. After the steel plate is under the paper, it is easy to cause the explosion line. At this time, the pad paper should be thinned.

5. When the pressure of the die-cutting machine is too large, it will easily lead to the explosion. At this time, the pressure should be reduced, so that the waste edge is just separated.

6. The indentation mold or the bottom touch paper is too thick and the indentation is narrow, which is easy to cause the explosion. Indentation dies of appropriate thickness should be used, and the width of the indentation should be moderate.

7. The accumulated paper powder falling in the slit is likely to cause a burst. The operator should remove clean paper, foreign objects, etc. in time.

8, the creasing line is irregular. The indentation line is a groove that is used to bend the mark by imprinting on the substrate by embossing. The reason for the irregularity of the indentation line is mainly because the indentation groove on the steel wire pad is too wide, the position of the cardboard indentation is not fixed; the thickness of the steel wire pad is insufficient, the groove angle is not standardized, and extra round corners appear. The knives and solid knives are not suitable tightly, the steel money is too tight, the bottom can not achieve ideal contact with the plane of the pressure plate, and the writhing is easy to be twisted; the steel money is too loose, and the indentation is easy to move around. The method of replacement is to replace the steel wire mat paper, the width of the indentation groove is appropriate; increase the thickness of the steel wire pad, trim the groove angle; adjust the position of the template; when the knife is fixed, the tightness of the knife is appropriate.

Next:Common problems and solutions in the process of color box crepe paper?