Today's Sichuan Color Printing Co., Ltd. (Deyang Daily Printing Factory) introduced the Italian large-format six-color web (satellite) flexo printing press after installation and commissioning, officially put into production.
Sichuan Today Color Printing Co., Ltd. is a comprehensive printing factory that integrates computer design, plate making and printing of newspapers, books, advertisements, and trademarks. They analyzed the current status of color high-grade corrugated cartons in China. One was to do slot printing. This kind of direct color printing on corrugated cardboard has certain limitations, which are not only limited by the number of colors, but also by the flatness of corrugated cardboard. The color printing effect is very unsatisfactory, and the reject rate is high. Second, some corrugated box manufacturers use multi-colored sheets of whiteboard paper to avoid these problems, and then use a veneer machine to attach the corrugated cardboard to indentation. Slotting, nailing (gluing) boxes, this method is obviously a more veneer process, increasing the product cost; Third, the printing of these two methods are subject to wide limits, from the high-end fine color printing in developed countries in Europe and America There is a big gap.
In order to shorten the gap between China's carton packaging color printing and foreign developed countries as quickly as possible, and continuously improve the grade and quality of China's existing carton packaging color printing, the company aims at the international advanced level and quickly seizes the commanding heights of the domestic market. In the color printing and production of exquisite cartons (boxes), on the basis of consulting and deliberation with the printing authorities and printing experts, we made decisive decisions and made unremitting efforts. We obtained approval from the competent technical reform department of the government, and strived to obtain a substantial world. Bank loans and self-raised funds, with a total investment of 14 million yuan. Through international bidding, the company introduced world-class printing equipment and introduced a large-format wide-format six-color web (satellite) flexo printing from the Italian Srudy Group. Machine; from Japan Mitsubishi Corporation introduced one of the most advanced four-color sheetfed offset presses; also purchased domestic first-class automatic die-cutting machines, countersinking machines, glossing machines, and other ancillary equipment to form pre-press and in-press printing systems. , Postpress processing one-stop high-end color packaging printing, production line. Since then, the company has laid a solid foundation for quality and quantity in order to achieve new leap-forward development, which has effectively enhanced the company's market competitiveness, enhanced the company's development potential, and created favorable conditions for enterprises to achieve sustainable development.
The company will introduce large-format, wide-format, six-color web (satellite) flexographic printing equipment that has won first place in China with international bidding. This is the first six-color web (satellite type) flexible version of green printing equipment introduced in China. The maximum width of this equipment is 1200mm, and the suitable materials are copperplate paper, whiteboard paper, white cardboard, kraftlinerboard paper, cork paper, and other composite materials (paper/plastic composite, paper/aluminum composite), which are actually printing tobacco, Wine, medicine, food, household appliances, instruments, and other high-end exquisite color box and high-grade exquisite cartons color surface roll paper pre-printed the most advanced printing equipment. The printing speed is 250 meters to 300 meters per minute. The use of non-toxic and harmless water-based ink can meet the requirements of various types of products on the field version and cable version 175 lines. The PLC control overprint is accurate, the outlets are well restored, and the level reproduction ability is strong. Excellent, high-quality, and economically-efficient world-class equipment.
The most prominent feature of the large-format, wide-format six-color web (satellite) flexographic printing press is color pre-printing with a corrugated board production line. The reporter learned from the introduction of relevant experts that preprinting is a new technology for corrugated board printing. This is because the corrugated box production process is commonly used in the production of corrugated board – → board printing (or color printing veneer) → die cutting → nail box/glue box. The best technology for corrugated board printing is flexographic printing, which is a consensus at home and abroad. However, although the flexographic plate can be used for irregular surface printing, this traditional process is only suitable for printing quality requirements, simple graphic and carton printing, does not meet the four-color plate lines 48, 52, 60 lines / cm, etc. 6 colors exquisite printing, its use has certain limitations. As the market is increasingly demanding for high-quality cartons that embody products and corporate image, pre-printing technology has been widely used abroad. In comparison, some people use the commonly used corrugated board printing process as "post-printing." The so-called "pre-printing" refers to the production of corrugated cardboard before the first printing (from roll to roll), and then the printed surface paper to the corrugated board machine veneer to produce cardboard. The process flow used for "pre-printing" is pasta paper (web) printing → production of colorful cardboard → die-cutting → nail box/glue box.
Pre-printing has some obvious advantages over post-printing. The first is to obtain higher print quality and more versatile. Second, pre-printing uses a satellite (web) flexographic printing machine to print on a smooth paper surface, and prints on uneven paperboard surfaces later. The use of a group-type printing press has greater advantages and can be used in different levels. More abundant printing, printing quality is more stable and reliable. The third is to increase the strength of corrugated boxes. This is because the pre-printing does not need to imprint the cardboard after it is formed, so that it is possible to avoid deformation of the corrugation and weaken the strength of the cardboard. With post-printing, the cardboard will be more or less deformed. The greater the number of prints, the greater the deformation of the corrugated and cardboard. Fourth, high production efficiency and ease of production management. The pre-printing uses a satellite (web) flexographic printing press. The printing speed can reach 250 or 300 meters per minute. Although the current corrugated board post printing machine can also reach a relatively high speed, the adjustment of the preprinting machine and Auxiliary time, scrap rate, and downtime are all significantly reduced. Therefore, pre-printing has become an important trend in the development of corrugated board printing. In particular, high-end exquisite cartons, including large and heavy-duty cartons, are more suitable for pre-printing.
From the comparison of the above four aspects, the pre-printing of corrugated cardboard is superior to the conventional post-printing that is commonly used today. Specifically, from the comparison of printing models, the former is a satellite (web), which can use more than 6 colors. The latter is a unit type (single cardboard), generally less than 4 colors; from the printing of graphic comparison, the former The printing plate number is 48, 52, 60 lines/cm fine printing, the latter is a simple graphic printing; from the overlay accuracy comparison, the former is higher and stable, up to ± 0.2mm, the latter is lower and Unstable, generally ±0.5mm-1mm; from the corrugation (cardboard and carton) shape, corrugated cardboard (carton) strength comparison, the former is not pressure, no deformation, can reach the maximum strength, the latter will appear compression deformation The more the number of imprints, the greater the deformation; from the press operation and adjustment, the former is relatively simple, high degree of automation, manual operation is less, the latter is more complex; from the production management, the former is relatively simple, stable quality The scrap rate is lower, and the latter is more complicated.