Smoke label hot stamping process online quality inspection system

Bronzing is the use of the principle of heat transfer, the transfer of aluminum layer in the electro-aluminum to the surface of the substrate to form a special metal effect. It not only achieves the decorative effect of the smoke sign, but also enhances the added value of the product and gives the product a higher security performance. At present, more than 85% of the cigarette labels use the bronzing process. In order to achieve the perfect bronzing effect, in addition to the need to ensure the quality of gilding machines, stencils with special characters or patterns, and anodized aluminum, it is also necessary to set appropriate stamping temperatures, stamping pressures, bronzing speeds, etc. for the printing materials. Process parameters. If any of the above steps does not meet the technical requirements, defects such as bronzing, improper bronzing, and pullback may occur. There is no doubt that the probability of a number of factors, related to the stamping process, resulting in quality defects is relatively large, while the face of the stringent requirements of the tobacco factory enlarging print quality, color and intense competition within the industry in recent years, resulting in a color printing company Quality control faces tremendous pressure.

At the same time, after the domestic tobacco industry is undergoing consolidation and reorganization, and the “532” and “Double Ten” policies have been successively introduced, increasing production has become the only way for tobacco brands to remain in this integration and achieve better and faster development under the national policy. way. Therefore, increasing production has become the main theme of the tobacco industry's process reform. For example, in the past, cigarette packers with soft packs used a single-sheet low-speed method, but many tobacco companies now use high-speed packers with a reel loading method and a pack speed of not less than 500 packs per minute. The emergence of new cigarette production technology has changed the original single leaflet supply method for cigarette label printing companies. Many companies have started to purchase curling and hot stamping machines, and rewinding machines have realized crimping processes. While the new process brings efficiency to the company, it also introduces new quality control risks. How to ensure the quality of ex-factory products becomes a color printing company under the new process, and it has also become a problem urgently needed to be solved by visual inspection manufacturers.

Beijing Lingyun Optical Digital Image Technology Co., Ltd. is the largest provider of printing surface quality inspection equipment in China. Since 2000 the company independently developed the printing surface quality testing equipment, has been providing various types of testing equipment more than 200 sets of equipment for the Banknote Printing and Minting, label printing, flexible packaging, printing, enlarging and printing customers. Since 2007, Lingyun Company has specially developed detection technologies for special processes for special materials in cigarette labels. Currently, inspection systems such as PackagingCheck-B and PackagingCheck-C have been developed to cover a variety of laser and bronzing materials, and it is the earliest realization of all cigarettes in China. A visual manufacturer of target material detection capabilities. In view of the quality risk introduced by the new process, Beijing Lingyun Company was the first company in the industry to launch a hot stamping online inspection system to provide an effective quality management method for the curling and bronzing process.

This system is based on the laser gilding material testing technology accumulated by Lingyun Company for many years. According to the characteristics of crimped bronzing products, it innovatively proposes online detection of gilding links. After cutting, the reviewer system is used to eliminate waste products by installing the rewinder in the ReviewCheck system. The inspection system is installed in front of the take-up reel of the curling and hot stamping machine. It can detect the finished product in real time and can detect all kinds of hot stamping and printing defects, and record the defect information and the location of the defect. After bronzing, the product is cut into several small rolls. Non-defective small rolls can be directly shipped. Defective small rolls use rewinding machines to locate the defect points. After the defects are manually processed, they can be shipped normally. This solution not only solves the problem of the detection of the softbox cigarette label sheet, ensures the quality of the manufactured product, but also enables the detection system to perform on-line inspection in the hot stamping links that are prone to continuous waste. For the accurate records of random defects, once continuous waste products are detected, the inspection The system promptly stops the alarm to ensure the pass rate of the printing and at the same time reduces the cost of printing.

At present, the detection system has been installed in several famous smoke label printing enterprises such as Kunming Jiujiu, Zhaotong Qiaotong, Dongguan Zhiyuan, etc., and through trial production tests, the system work is stable and reliable, and the detection capability covers printing, ordinary stamping, holographic positioning Hot area, fully meet the quality management requirements. The detection speed can reach up to 70 meters/minute, which is consistent with the production speed of the crimping and hot stamping machine. The detection system is seamlessly matched with the curling and stamping production process, which fully satisfies the requirements for the new process production of color printing companies. In the future, Lingyun will continue to contribute to the improvement of product quality control of cigarette label printing companies.