The carton pre-printing equipment is a large-unit gravure printing machine, and the auxiliary equipment is corrugated paper production line computer-controlled cross-cutting and slitting. The pre-printed facial paper is installed on the hanging surface station of the corrugated cardboard line, after sizing, veneering, flattening, drying, cutting and other processes, and finally made into colored cardboard, after die-cutting, sticking the box, etc. The manufacturing process completes the carton production.
The important configuration of the gravure printing carton pre-printing production line is the computer cross-cutting of the corrugated cardboard production line. The cross-cutting recognition function must be added to the cross-cutting knife of the corrugated cardboard production line. The cross-cutting mark transmits the time when the cross-cutting mark reaches the photocell to the control computer, and then the control computer controls the time of the cross-cutting to accurately cut the corrugated cardboard at the pattern boundary.
1. Ink and varnish: The ink used in pre-printed gravure printing machine is mainly alcohol soluble ink or special gravure ink for water-based paper. When the pre-printed paper is flattened and dried in the corrugated paper production line, the ink needs to have high temperature resistance and friction resistance, otherwise the color surface will be drawn or dragged. The "Tianshi" brand ink produced by Tianjin Toyo Ink Factory can meet the gravure printing of water-based paper, with low cost and no pollution, and meets the national environmental protection requirements. The pre-printed ink for gravure carton produced by Shanxi Jingke Industry and Trade uses cellulose as the base material, and the main solvents are alcohol and ester. Compared with water-based inks and offset printing inks, this ink has bright color, high gloss and abrasion resistance, high temperature resistance of 180 ℃ -250 ℃, good printing adaptability, clear printing pattern, delicate color performance, and most of the printed surface Has excellent adhesion.
2. Printing plate: The pre-printed printing plate is made of steel chrome-plated electrogravure gravure. The number of intaglio screen lines can reach more than 300 lines. It is completely suitable for field plate printing and dot-gradation printing with color transition. The gravure carving is deeper in the net hole carving. The glazing roller can use a fixed number of screen rollers and adopt shaftless transmission. Domestic plate-making manufacturers such as Shanghai Ocean City, Southern Platemaking, Sanmenxia Lanxue and other manufacturers have reached the international advanced level.
3. Paper: The gravure preprinted printing material must use coated white paper with good surface smoothness, strong printing adaptability, and stable moisture content (6% -7%). Imported coated cow cards and domestic gray bottom whiteboard can meet the paper matching requirements of high-grade color corrugated box facial paper. Finland M-REAL Forestry Company is famous for the production of coated paper with high hygienic standards. 185g of coated paper is commonly used in domestic pre-printing machines. The quantitative range of paper is 150g-350g / m2. The US Mead paper industry has always used 500g The original wood pulp coated cattle card paper gravure printing carton and canned beer portable carton, the strength exceeds the corrugated carton.
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