Gold stamping system and overprinting process for highlight paper and laser film for cigarettes

Abstract

A gold stamping system comprises a first gold stamping device, a detection device and a second gold stamping device, wherein the first gold stamping device is used for conducting primary overprintingon highlight paper and a first laser film, drawing a sample on the highlight paper and giving a laser mark; the second gold stamping device is used for further overprinting the highlight paper and a second laser film to conduct hot stamping on the drawing sample; the detection device comprises a fundamental wave photoelectric head and a sampling photoelectric head, the fundamental wave photoelectric head corresponds to the second gold stamping device in position and is used for forming a color cell fundamental wave, and the sampling photoelectric head is used for scanning the laser mark on thehighlight paper and forming a sampling wave; and the sampling photoelectric head is provided with a corresponding reflector. According to the system and the process, the stability and precision of alumite or laser film mark identification in the overprinting process of the highlight paper or the assembled paper can be guaranteed, so that the overprinting accuracy and color saturation are guaranteed, and the product quality of batch overprinting of the highlight paper for cigarettes is further improved.

Description

technical field [0001] The invention relates to the technical field of cigarette materials, in particular to a bronzing system and a process for overprinting high gloss paper and laser film for cigarettes. Background technique [0002] With the increasingly high process quality requirements of international hot stamping products, the traditional hot stamping of anodized aluminum hot stamping with different colors on the assembly paper has become more and more difficult to meet the process requirements. strict. Generally speaking, since the printing plate roller is a solid cold plate, there is no influence of thermal expansion and contraction, while the bronzing plate is a hollow hot plate (with a large amount of high-temperature heat-conducting oil inside), and the anodized aluminum itself is easy to stretch and deform, so the The bronzing process requirements are relatively low. In the prior art, the bronzing process requirements are generally ±20 wires, which is slightly ...

AI Technical Summary

Problems solved by technology

[0004] When hot stamping the laser film on high-gloss paper, the automatic overprinting uses ordinary photoelectric heads, even the single photoelectric head of Sick and the dual photoelectric head of Jida cannot recognize it stably, and the mark mark is easy to appear during overprinting. It cannot be accurately identified, and the appearance is frequently lost, resulting in a large overprint deviation. At the same time, in actual production, when the laser film is generally overprinted for the first time, the German sick single photoelectric head can basically match the mark mark (the general standard form is 2*4 rectangle) for identification, and the phenomenon that the mark mark cannot be recognized is also prone to occur during the second overprinting. The optical signal collected by the photoelectric head changes when it is converted into a PNP electrical signal, and the mark appears in the sampling waveform of the man-machine interface. Cases where the mark is lost irregularly

[0005] Although the operator can find a suitable value for continuous reproduction by constantly adjusting the focal length of the photoelectric head and its own threshold value, it is not suitable for mass production, because different manufacturers even provide different batches of laser film from the same manufacturer. The gloss, saturation, and thickness of the aluminum layer all change, but the manufacturer cannot provide corresponding real-time detection data. The changes in these parameters bring great troubles to actual production.

In this case, even if the German sick single photoelectric head and the Jida dual photoelectric head are used, they cannot be recognized stably, resulting in the situation that batch products cannot be overprinted.

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