Analysis of the hot stamping of self-adhesive labels
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1. Hot stamping method
According to the processing method of the self-adhesive label, the hot stamping method is divided into a single sheet of hot stamping and a web stamping. Sheet-fed gilding is the same as the traditional bronzing process and is processed on a dedicated bronzing machine. Web bronzing is done on the label linkage and is the most widely used processing method. At present, there are several ways to gilt the reel material:
1 label machine flat pressing bronzing
For the letterpress label printing machine, whether it is flat flat or round flat type equipment, since the roll paper is intermittently fed, the bronzing is all flat and flat. Under normal circumstances, the bronzing station is an independent unit, and some models are gilded to share one unit with die-cutting and used separately.
2 multi-station flat pressing bronzing
Some models have a two-station bronzing unit, such as Japan's Shiki's SMHC-45-MWL labeling machine, one unit close to the plate, complete horizontal bronzing, and the other unit is a separate unit, complete vertical bronzing. This model can perform two-color bronzing at the same time.
3 processing machine flat pressing bronzing
The machine is designed for the processing of printed roll labels and labels that do not require printing. Bronzing is a function of the processing machine. The bronzing device on the processing machine generally adopts the flat pressing method, and its working principle is the same as the above labeling machine.
Round press on the 4 rounds
The bronzing plate used for round pressing and bronzing is a roller-shaped plate. When bronzing, it is in contact with the impression cylinder to achieve hot stamping. Round press bronzing is suitable for use on the continuous transfer labeling machine of continuous paper feeding, but there are certain requirements for the feeding speed, that is to say, the printing speed is affected. However, compared with the flat pressing and ironing, the efficiency is greatly improved. The round-pressed hot stamping rolls are expensive to manufacture, so they are only suitable for long-running hot stamping.