Our flexible packaging Printing production is mainly based on gravure printing. Based on the characteristics of gravure printing machine, gravure ink and gravure printing process, some common defects are easy to occur in the process of gravure printing of flexible packaging , such as inaccurate overprinting, color difference, and knife wire. Missing printing, flying ink, etc., in which overprinting is not allowed, color difference, knife wire accounts for more than 80%. Imprinting is not allowed In the past, the flexible packaging gravure printing is generally 5 to 6 color overprinting, and now it has basically reached 9 colors or more, and some even reach 12 colors, and sometimes it needs to be printed on the front and back, which requires higher precision of overprinting, resulting in the possibility of overprinting. It will also increase. The main factors affecting the accuracy of overprinting are the performance of the gravure press, the change in the tension of the film, and the level of operation of the worker. There are also many types of inaccurate overprinting, both continuous and sporadic. In the production of high-speed gravure printing, overprinting is not easy to find. Once it is discovered, it is too late. The scrap of several kilometers and hundreds of meters is unavoidable, which will undoubtedly cause huge losses for flexible packaging enterprises. Economic loss. Color difference The color difference is mainly related to the selection and use control of the ink, for example, the ink is not accurate, the old ink is not used properly, the ink hue and the viscosity control are unreasonable. Knife Knife is one of the most common defects in gravure printing. The cause of such defects is relatively simple. When there is impurity between the doctor blade and the plate roller, a thinner and shallower wire is generated, which is not easy to be found; and when the blade has a gap, the generated wire will be generated. More obvious, easier to find and solve. Advantages of quality inspection systems Printing quality inspection is mainly concentrated in the printing and post-press review stage. Quality inspection in the printing stage can prevent the production of continuous waste and save raw materials. The quality inspection in the post-press review stage is mainly used to control the quality of printed products, eliminate serious waste and avoid occurrence. Customer complaint or chargeback event. At present, most of the domestic soft-package printing quality inspection adopts the sampling method, that is, the strobe light and the still picture are used for manual detection. This is mainly because the quality management system of domestic flexible packaging printing enterprises is chaotic and the threshold of introducing automatic visual inspection equipment is high. . However, the printing speed of the high-speed gravure printing machine is basically 200-400 m / min. The occasional observation of the strobe light is difficult to find sporadic defects, plus the technical limitations of the operator and the fatigue caused by long hours of work, a slight negligence. There will be hundreds of meters or even thousands of printed waste. The use of quality inspection systems instead of manual sampling can bring the following value to flexible packaging printing companies. (1) On-line detection and feedback of continuous defects in the printing production process, such as overprinting, color difference, knife, stencil, scraping, missing printing, etc., timely adjust the printing process, reduce waste generation, prevent Waste products flow into customers and have a negative impact on the company. (2) It can greatly reduce the mental stress and labor intensity of the quality inspection workers, streamline the number of quality inspection personnel, and reduce labor costs for flexible packaging printing enterprises. (3) It can directly improve product quality, reduce wear and tear, improve enterprise efficiency, and enhance corporate brand image. Application form of quality inspection system The quality inspection system based on visual image obtains the surface image of the printed matter through the high-speed camera, and analyzes and processes the collected image by using a computer to automatically determine the printing quality of the printed surface. Because the visual image quality detection system can detect defects that are difficult to be discovered by the human eye in real time, and can perform all-round automatic quality monitoring on all products, it completely overcomes the shortcomings caused by manual visual sampling and still picture detection methods. With the rapid development of computer technology, this technology will be more integrated and intelligent, and can provide an ideal solution for the quality inspection of flexible packaging printing. Portable Baby Booster Seat,Baby Feeding Chair,Portable Baby Chair,Kids Study Chair Zhejiang Lamon Technology Inc. , https://www.baby-chaires.com
How flexible packaging companies pay attention to the use of quality inspection systems
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