Digital inspection device for packaging printing products has good prospects
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
With the improvement of the social living environment and the improvement of health awareness, as well as the gradual improvement of various regulations, people's requirements for the quality of packaging materials and printed products are also increasing. Tiny printing defects are likely to cause printers to bear huge economic losses and lose the trust of users; and the reduction in printing prices has also made printers pay more attention to the economical use of raw materials; at the same time, they are also subject to batch reduction and variety. Increased and huge pressure on shortened delivery times. It is necessary to improve work efficiency, reduce costs, and continuously meet customer requirements for multi-color, high-difficult and high-quality printed materials. This requires printers to be equipped with advanced printing inspection systems to further strengthen the inspection of defects in printing links. .
Print inspection is one of the effective ways to improve print quality and printing efficiency. The advanced printing inspection system can improve inspection accuracy, find out the cause of defects, and effectively control the quality of products in printing. The general image detecting system can stably capture the instant printing effect at the same position when the printing machine is running at a high speed, and present it on the display, and then enlarge the image to be observed according to different needs, and automatically track the scanning function vertically. This system allows the operator to instantly detect defects in the printed matter when the printing machine is running at high speed, and correct errors and reduce waste in time. However, the traditional offline and online inspection methods can only perform intermittent inspections and require skilled Professionals cannot perform comprehensive inspections and record inspection results, and manual visual inspection is difficult to adapt to high-speed and large-scale printing inspections.
The basic principle of the computer-based digital detection system is to collect a defect-free standard print image through a CCD camera, save it in a computer, and then collect the image to be inspected online, and continuously check the image to be inspected and the standard image. For comparison, the error is detected, the defect image is obtained, and the defect image is classified and measured.
At present, the advanced digital printing defect inspection device on the market uses a high resolution CCD camera, combined with the latest image processing technology and software processing technology, and can perform high-speed, high-precision comprehensive inspection without relying on the operator's experience. PRINT-CAP with TOKIMEC (Japan Tokie Mi)
For example, the Ver4 series printing defect inspection device is composed of a main body, a 3-line type CCD camera, an illumination, an encoder, and a labeling machine. The inspection method is to read an image as a reference image, compare the image taken by the 3-line CCD camera with the pixel data at the same address of the reference image, and display the defect image after detecting the defect, and then store the defect data and use it. The attached browsing software analyzes the saved defect data and finally labels it. After the inspection is completed, the system can perform defect history printing, defect image printing, and use the network to confirm the defect information.
It is reported that the three-line CCD sensor has high resolution and spectral color gradation, and the three rows of parallel pixels respectively cover the RGB filter. When capturing a color picture, the complete color picture is composed of multiple rows of pixels. The detection system uses a 3-line CCD high-speed scanning camera to monitor the printed matter at any time, and decomposes the captured print image into red, green, and blue colors, and then performs high-precision and high-speed data processing on the decomposed color components. Very fine print defects can be detected. With the 3-line CCD sensor, there is no color blind zone in the horizontal direction, which can effectively detect the wire; in the vertical direction, phase compensation is required, and each line of data read is stored in the memory and converted into a two-dimensional image.
The advanced image recognition technology uses pixel-to-pixel inspection, area-to-area inspection and knife-inspection special boards to achieve high-speed and high-precision inspection. The higher alignment accuracy can reduce the false detection caused by the expansion and contraction of the printed matter; the concise and clear inspection screen is more conducive to detecting defects, and is automatically classified according to heavy defects, medium defects and light defects, and various defects are inspected. Conditions can be set by the user.
The digital printing inspection device can also find out ways to eradicate defective products, reduce the rate of defective products, thereby reducing the penalty for breach of contract and the cost of reprinting, and saving raw materials and labor costs, thereby greatly improving production efficiency. The digital inspection device can be widely used in various printing machines such as gravure printing, sheet offset printing, form printing, label printing, flexographic printing, etc., and can also be used for various machines such as a sorting machine, a winder, a laminating machine, a coating machine, and the like.
In recent years, the importance of printed image detection systems has increased. In industrially developed regions such as Europe and the United States, most printer manufacturers have adopted image inspection systems as standard. The use of computer for automatic detection of post-printing defects has the characteristics of high speed and objective detection results. The application of digital image processing technology to the quality inspection of printed products undoubtedly has a broader development prospect.