1. Die cutting precision is not high precision is not high because of the die cutting version itself, there are problems from the printed matter. Manually produced die - cutting plate, the error is large; Die cutting indentation and printing operation environment will cause paper deformation, resulting in die cutting indentation location is not accurate, especially after polishing, film coated paper deformation is more serious, affecting the precision of die cutting. Solution: choose advanced plate making, improve the precision of die cutting plate: try to ensure that die cutting indentation and printing in the same working environment or ensure the same working environment (that is, the same temperature, humidity, etc.); Glazing and film coated sheets to die - cutting pretreatment, minimize the impact of paper deformation on die - cutting accuracy.

2. Die cutting indentation produced bursting line and dark line "bursting line" is due to die cutting indentation pressure is too large, exceeding the bearing limit of the cardboard fiber, so that the cardboard fiber fracture or partial fracture; "Dark line" refers to the indentation line should not be. Generally, die cutting plate and indentation steel line selection is not appropriate, die cutting pressure adjustment, paper quality, paper fiber direction and die cutting plate row knife direction is not consistent or low water content of the paper caused by the paper flexibility. Solution: choose the appropriate die-cutting version; Adjust the pressure of the die cutting machine; Before die-cutting to die-cutting paper placed in the workshop for a period of time; Increase the humidity of workshop environment.

In addition, there is a special case, is in die-cutting hard box cigarette package small box, because of many positions of the indentation line between the distance is very close, if the normal configuration indentation steel line height, the pressure on the paper when the tension is too large, will also cause a burst. Therefore, we should try to minimize the tension on the paper. There are two methods: one is to reduce the height of the indentation steel line; The second is to reduce the thickness of indentation bottom die strip, both can not be used at the same time, otherwise it is not good indentation effect. A better method is to reduce the height of the indentation steel line, usually by 0. 1 to 0. 2 mm. According to the paper thickness to determine the specific reduction, quantitative in 350g/m2 above the paper needs to reduce 0. 2mm, 350g/m2 lower paper 0. It is advisable to 1 mm.

3. Indentation line run. Not full indentation steel line under the action of die - cutting pressure twist will lead to indentation line run; Die cutting pressure will cause the indentation is not full. The method of replacing die - cutting plate and increasing die - cutting pressure can improve the problem.

4. Die cutting fuzz, dust in die cutting, often appear die cutting products edge not clean, fuzz phenomenon, especially some close to the indentation line is serious. This is due to the die fit pressure, die cutting plate on the rubber, indentation steel wire on the paper produced tension, paper is not completely cut through when the tension produced a burr.

To solve this problem first according to the paper to choose different types of die cutting knife. Die cutting knife including straight blade and horizontal blade, two kinds of blade and height. Blade line and height, directly related to different types of paper, die - cutting quality and die - cutting knife service life. In avoiding paper wool, straight blade is better than horizontal blade; In the service life, the short blade is better than the high blade. In die cutting coated card, you should choose straight line high blade, and the blade is grinding, it is best not to use a concave and convex molding process, otherwise the pressure is too large on die cutting shadow mouth. And in the processing of ordinary paper to choose a high edge, and according to the quality of paper fiber to determine the edge of the line. When die cutting fiber is poor or thick paper choose straight blade, fiber quality is good can choose horizontal blade, in order to improve the service life of the knife,

Also can be in the indentation steel line close to the die cutting knife with 60 degrees of arch tape, reduce the die with the indentation steel line close to the die cutting knife on paper tension. If die cutting quantitative 300g/m2 of paper is usually used 0. 4 MMX 1. 3mm indentation line, 23.4mm high indentation steel line, in case of this fault, you can use 0. 4 MMX 1. 2mm indentation line. 23. 3mm high tip indentation steel wire. In this way, reduce the mold fit pressure on the paper tension, fuzz problem can be basically solved.

5. Die-cutting "paste version" die-cutting "paste version" refers to the paper adhesion on the die-cutting plate. The causes of this kind of failure are: die cutting knife around the paste of sponge rubber density is too small or too small hard, back elastic; Die cutting edge is not sharp, paper too thick, caused by clamping or die cutting stick knife. According to the distribution of die - cutting knife, reasonable choice of different hardness of the sponge or replace the die - cutting knife.

6. Die - cutting "loose version" die - cutting loose version is mainly related to the plate-making process and sponge strip. If the shape of the live parts is complex or arranged live parts, and die cutting on the point is small and few, it is easy to cause the die cutting loose. To this, want to increase to connect the amount of point appropriately. In addition, the production of die - cutting version as far as possible to print length direction and paper direction. Die - cutting version of the paste on the paper sponge rubber hardness is small, too soft, can not make the paper smoothly from the die - cutting knife or indentation steel line, will also cause loose plate. The solution is to change the hardness, good elasticity of high quality sponge rubber.