Gravure printing and dragging failures are often encountered in gravure printing. These two kinds of failures exhibit different phenomena, their causes and solutions are different, but many people, including some articles published in professional printing magazines The two faults are conflated, so it is easy to mislead people who are new to gravure. 1. Different phenomena Dragging is a gradual change from a certain part of the picture and text, which gradually disappears. The shape of the animal is often called tailing. The paste version is different. It is a figure that overflows at the edge of the graphic and the width of the graphic is basically the same, the ink color is lighter than the graphic, and the shape is uncertain. 2. The causes are different The reason for the drag is that there is impurities between the scraper and the printing plate, and it extends to the back of the ground knife. When the scraper scrapes the graphic part on the printing plate, impurities are in contact with the ink. When the scraper scrapes out the force producing part of the text, the impurities fall behind the blade and contact the printing plate, which will damage the graphic. The squeegee is mainly due to the curved contact between the scraper and the printing plate, that is to say, the knife is very tight and the air pressure is also large. Inside is allowed. When the scraper moves out of the graphic part, the blade hits the shoulder of the net and will bounce back like a ball hitting the wall. Therefore, when the blade moves out of the graphic part of the plate, the part of the scraper that contacts the graphic will give way to the side. The printing plate is scraped clean, under the action of printing pressure, the ink will overflow the graphic part, causing paste. 3. Different solutions In the production, if the image or text is damaged, just use a bamboo chopstick to gently scrape it. If you encounter the problem of gluing, you need to solve it by loosening the knife and reducing the air pressure. 4. The common points of the two faults When the viscosity of the ink is relatively low, dragging and paste faults are easy to occur. Therefore, appropriately increasing the viscosity of the ink has a great effect on preventing the occurrence of the above two faults. Rotary printing machine changes to die-cutting machine The one-turn rotary printing machine in the printing plant can be converted into a die-cutting machine. The converted die-cutting machine has accurate overprinting, uniform pressure, fast die cutting speed, simple operation, low labor intensity, and can be used for die cutting below 450g / m Prints. The machine can also be used to press concave and convex protrusions, which also has the advantages of accurate overprinting, high pressure and fast speed. The specific conversion steps are as follows: First, remove the ink fountain assembly as a whole. In order to ensure the safe use of the modified equipment, another glass cover can be made to cover the plate. The shield should be designed to be opened to facilitate the operation such as plate installation. Then, remove the liner of the impression cylinder and wrap it with a stainless steel skin with a thickness of about 0.50 mm. Depending on the thickness of the printed part, the PS plate, polyester base or paper can be lined accordingly under the steel skin to ensure that the thickness of the printed part itself and the total thickness of the press cylinder liner does not exceed 1.20mm. Then, the die-cutting plate was installed, and a round flat die-cutting machine was successfully modified. Indentation and forming quality of corrugated boxes In the production of corrugated cartons, except for some cartons that have high requirements for forming quality and high-speed automatic packaging production lines, they are basically the process routes of slitting, indentation, opening and opening, molding and nailing. Among them, the indentation plays a key role in the forming quality of corrugated boxes. The function of the indentation is to enable the corrugated cardboard to be folded into boxes according to the design requirements. The structure of corrugated cardboard is different from that of ordinary carton. Therefore, in order to ensure that the mark line is clear after the indentation and does not damage the cardboard, it is easy to fold and form, the angle after folding is straight, the corrugated line is straight, and the box body is regular The arrangement of the line is still very selective in the selection of the indentation knife line. Especially for thick corrugated cardboard, the quality of the indentation, the size of the box and the location of the indentation have a great relationship. For longitudinal and vertical makeup, when the indentation line falls on the corrugated peak or corrugated valley of the corrugated core paper, the quality of the indentation is generally better, and the forming size of the carton is also easily guaranteed. However, if the indentation line falls between Lengfeng and Lenggu, that is, at the half waist, the quality of the indentation is difficult to guarantee, and the molded size of the carton often has deviations. Blank Dice,Blank Diy 6 Sided Dice,Blank 6 Sided Dice Cube,Blank Counting Dice NINGBO BESCON GAMES AND APPLIANCES CO., LTD , https://www.bescondice.com