Some problems needing attention in die cutting
DATE:2017-5-8 VISITORS:493
[China Packaging Network] you want to make a qualified carton, die-cutting process is essential. Carton die cutting quality depends on the excellent performance of die-cutting equipment, but also need to pay special attention to the following aspects of the details.
Die cutting knife
Die cutting knife in accordance with the form can be divided into short front knife, a single short front knife, knife peak, single peak knife four types. The type of material for cutting the four types of different short front knife is mainly used for processing of ordinary cardboard, single-sided short front knife is mainly used for processing of fiber materials, high sharp knife is mainly used for processing corrugated cardboard, leather and plastic, single high sharp knife is mainly used for processing of EVA and sponge.
Die cutting knife improper selection, not only will cause the paper a box die cutting, such as die-cutting edge burr, dust, etc., will also make the process of changing the die cutting knife, reduce production efficiency. Under normal circumstances, for the die cutting die cutter height is 23.8mm, thickness of 0.71mm. If you need special parts cutting, a targeted selection of cutting knife type.
At present, the widely used in the industry, the die cutting knife brand is mainly Sweden's SANDVIK, Austria's BOHLER, Japan's TSUKATANI and Taiwan's SANLI, etc.. For the requirement of high quality, mass production, the need for repeated printed work, suggested the use of imported cutting knife excellent performance; quality requirements for low production, small batch, mainly used for proofing work, can choose domestic die-cutting knife at low cost.
Two. Sponge strip
According to the different hardness, sponge is generally divided into low, medium and high grade applications each grade sponge is different, such as the hardness of 30 ~ 45 shore hardness sponge rubber strip suitable for quantitative under 300g/m2 light paper, hardness of 45 ~ 60 shore hardness of sponge rubber applies to the corrugated cardboard and quantitative higher than the 300g/m2 of the white cardboard, hardness 60 ~ 75 sponge hardness is mainly used for cutting edge easily roughed.
In the installation of sponge also needs to pay attention to some details, such as a sponge rubber strip is close to the cutting knife blade, this is because in the process of cutting sponge strip will be compressed when the top surface to the cutting blade, will produce an outward force of cutting knives, paper cutting edge serrated lead like. Therefore, there are gaps between the sponge and the cutting knife body 2 ~ 3mm.
Three. Indentation die
A suitable indentation die is also very important. When selecting the indentation die, we should pay attention to the precision of the size, the hardness of the base paper and the bonding fastness. The most important application in the market is CITO. In addition, according to the different thickness of the paper, the indentation size of the different specifications.
Four. Paper
A lot of people think that by cutting the paper to get a good processing effect is not difficult, and often overlooked the internal details of the paper. Each paper has different fiber structure, deformation resistant strength, surface coating quality, therefore, we in the selection of paper carton, first of all, to ensure that it has good resistance, in case not covered, it is not easy to burst line phenomenon, and when bending the surface the coating does not produce serious cracks; secondly, the same kind of paper per unit area of the thickness shall be stable and consistent, and the thickness error between the paper should be kept within less than 5 m, otherwise it is very easy to cause the problem of cutting penetration, low production efficiency, especially for some recycling processing paper; in addition the deformation degree of paper carton, the cutting quality has direct effect, once the paper will lead to deformation, die-cutting bits are not allowed to produce a lot of waste.
Conditional paper packaging printing enterprises through the incoming inspection, the details of warping to the carton to the category of quality control.
Five. Fine operation
In cutting a new batch of work before, operators need to first floor die-cutting machine is clean, because the bottom surface may exist in the process before the residual adhesive. In addition, the operating personnel in cutting pressure adjustment, need to gradually increase from small to large, if the one-time cutting pressure, the cutting knife and the floor is damaged, serious damage of die-cutting machine.
For the same number of parts by different operators to get different cutting effect. Therefore, in the daily production, the operator needs to carry out according to the standardized operation standard, at the same time each department must maintain the good communication, the exchange experience.
