Hot stamping pressure is the key to hot stamping

Hot stamping is a key post-printing processing step in cigarette pack production. Hot stamping is a commonly used method. It can use hot stamping equipment to transfer the electro-aluminized material to the surface of the confining iron by pressing and heating. . In the hot-stamping process of cigarette packs, the factors influencing the hot-stamping effect are many, among which, the hot stamping pressure is one of the main influencing factors. Below, the author will combine many years of practical experience, the impact of hot stamping on the effect of cigarette stamping and adjustment methods will be briefly described.

If the stamping pressure is too high, the hot stamping pattern on the surface of cigarette packs is prone to discoloration, anti-pulling, or even damage the hot stamping version. Even if the stamping version is not damaged at that time, the service life of the stamping version will be greatly reduced and the production cost will be increased. At this point, it can be solved by adopting overall decompression or partial decompression. The overall decompression is to directly reduce the pressure parameters of the equipment; the local decompression is to reduce the pressure compensation paper in a single spell or a small area, and the specific operation depends on the actual production conditions.

If the hot stamping pressure is too small, the hot stamping pattern on the surface of the cigarette pack is likely to cause serious defects of gold drop and point drop. At this point, you can use the overall pressure or local pressure method to solve. The overall pressurization is to directly increase the pressure parameters of the equipment; local pressurization is to increase the pressure compensation paper in a single spell or a small area, and the specific operation depends on the actual production conditions.

It should be noted that the overall decompression and overall pressurization method is suitable for ordinary hot stamping. This is because the contact surface between the ordinary hot stamping plate and the consumable is a stable plane, especially the large-format hot stamping products. It is the pressure balance of the full plate. If partial pressure adjustment is used, it is easy to affect the pressure balance of the full plate due to partial pressure inhomogeneity, resulting in repeated production of pressure and affecting the production efficiency and failing to achieve the pressure compensating effect. Happening. Moreover, the ordinary hot stamping process is relatively stable, and the hot stamping pressure is also relatively easy to control.

The local decompression and local pressurization methods are applicable to three-dimensional hot stamping, because the contact surface of the three-dimensional hot stamping plate and the continuation material is uneven, so the graphic part is easy to drop gold, drop points or edge paste gold The phenomenon, and the local pressure adjustment just can accurately adjust these partial pressure problems, not only can improve the production efficiency, but also help to improve the stamping version of the printing rate, saving production costs. It should be noted that in the case of partial pressure adjustment in the three-dimensional hot stamping of cigarette packs, it is best to tear off the pressurizing paper by hand and stack it into a pagoda shape. This will not only help eliminate the air in the hot stamping area, but also enable The pressure is more stable and uniform.

We know that the hot stamping temperature, the hot stamping pressure, and the hot stamping speed influence each other, so during the hot stamping process, if the hot stamping product appears a slight paste, the stamping speed can be appropriately improved; if the hot stamping product appears Dropping points and slight hot-stamping conditions can increase the hot stamping pressure, increase the hot stamping temperature, or reduce the operating speed of the equipment.

In addition, since the new three-dimensional hot stamping edge is generally sharp (the ordinary hot stamping version does not have this problem), it is necessary to do some minor processing before using it for the first time, otherwise it will bring a lot of trouble to the loading process. For example, sanding the edge of the copper mold with fine sandpaper, or polishing the entire plate with an alcohol-based plate brush, is not only beneficial to plate loading, but also greatly improves the efficiency of plate loading. The hot stamping plate will not appear due to hot stamping. The edge is too sharp and causes the quality problem of the stamping part of the stamping product to be pressed through, so as to ensure that the stamping product satisfies the quality requirement of the customer.