In the production of gravure printing, due to the evaporation of the solvent in the ink tank, the uniformity of the ink is reduced, and the surface is easy to form ink skin and ink sticks. After the plate roller is attached, the scraper is not easy to scrape clean, which causes the printed product to paste, cut lines defect. To solve this problem, as long as the ink "flows" and keeps mixing, it will naturally be avoided. There are two ways to make the ink move. One is to use the ink circulation pump to circulate the ink; the other is to place the stirring rod in the ink tank to make the ink flow in the ink tank. The former is the external circulation of ink, which has high cost and increases the factors of failure. It is generally matched with the addition of solvents and the automatic viscosity control system, which is not included in this article. From the perspective of making the ink uniform, the latter is the most economical and effective measure. The ink stirring rod is generally a rod made of aluminum alloy, with continuous spiral protrusions on the surface, so-called "corrugated" or unfolding lines, and magnetic materials at both ends, which can be adsorbed on the plate roller. During printing, the ink stirring rod floats on the surface of the ink, and when the plate roller rotates, it rotates in the opposite direction by the suction. When rotating, the corrugation drives the surface layer of the ink, allowing the surface layer of ink to move, so that the ink is evenly distributed to avoid the corresponding quality problems of the printed product. There are two main points in determining the quality of the ink stick: 1. Effect The reason why the ink surface peels during the gravure printing process is mainly because the printing plate cylinder is round and has a center point in operation. The printing process only runs in one direction. The bubbles generated during the operation float on the ink surface in front of the plate cylinder to form a so-called ink crust. It is precisely due to the intense operation of the plate cylinder that causes the surface to form bubbles, which causes the organic solvent in the ink to be too volatile. The ink agitation stick is only a spacer between the plate cylinder and the surface of the ink. Its real function is to operate properly, that is, to play the role of agitation and isolation, and to reduce the use of organic solvents. And the magnetic substance on the ink stirring stick can absorb the metal residue in the ink. It also plays a filtering role. 2. Life The ink stirring rod is generally hollow because it needs to float on the surface of the ink. If the seal leaks, the solvent enters the inside of the ink stirring rod and will sink and lose the stirring effect, so the seals at both ends should be resistant to corrosion. In addition, the surface wear resistance is better. The most durable on the market is the all-aluminum ink stick. That is, the two-end sealing is also aluminum products or other metal products. Currently, commercially available ink stir sticks generally have the following types: 1. Plastic Ink Stick Common in imported products, the surface is made of abrasion-resistant plastic sheet, and the paper core is used internally. The quality is quite good, and the price is relatively high, generally about 1,000 yuan per meter. It is said that some people in China have faked it, but because there is no better wear-resistant plastic material, the life is relatively poor. In addition, the ink stirring effect is not very good. In fact, this paper ink stick is the best. Because the round bar made of paper is not easy to deform, because he has a certain toughness. No metal is more likely to deform. 2. Stir the ink stick around the rope It is generally made of general-purpose aluminum tube, and a wire rope is wound on the surface for unwinding. This type of product has two defects: â‘ Because the wire is wound, the unwinding angle is relatively small; 3. Single line aluminum alloy corrugated ink stick The structure is the same as the rope stirring rod, except that the rope is changed to an aluminum alloy spiral protrusion, because there is only one unfolding line, the angle is small, and the ink stirring effect is relatively poor. This is much better than the 4 below. Because the friction surface of the ink stick and the plate cylinder is small. Less protruding stripes. This product has applied for a national product new utility patent in 2003 4. Eight-line aluminum alloy corrugated ink stick Aluminum alloy rotary extruded profile, with 8 unfolding lines on the surface and large angle, is currently the best product for stirring ink. In addition, this type of product is not only corrosion-resistant at both ends, but also has good wear resistance. If the iron debris and other debris adsorbed by the ink stirring rod are cleaned in time, the service life is generally 2 to 3 years, which really saves the manufacturer's uniformity. Ink cost. This is also the product currently selected by most color printing plants. At present, the LB-03 eight-strike ink stick of Beijing Landmec Company and the eight-strand ink stick of Guangxi are such products. The so-called eight-line is a pattern used for decoration of domestic stainless products. Stainless steel products are more common. There is a question about the direction of the ink return of the eight-line corrugated ink stirring rod, but it is actually a question of whether the corrugation has an interface. If the left and right swirling waves meet in the middle, the ink will flow from the middle of the ink tank to the two ends or the two ends to the middle when working (need to reverse the placement direction); if the ink stirring rod is a flute (that is, there is no interface, regardless of left-handed and right-handed) , The ink will flow from one end of the ink tank to the other end when working. However, these two ink recirculation methods have basically no effect on the uniformity of the ink. Each interface will bring wounds to the plate cylinder. This one should be the clearest. Because the interface is not in line with other patterns. It is also called higher or higher. Each run collides with the plate cylinder at a higher point. Stainless Steel Utensil Holder Stainless Steel Utensil Holder,Kitchen Utensil Holder,Stainless Steel Cutlery Holder,Restaurant Utensil Holder Jiangmen Junerte Stainless Steel Kitchenware Co.,Ltd , https://www.jetkitchenware.com
â‘¡The cord will infiltrate the ink, and it is not easy to clean when changing the color of the ink. The disadvantage of tangling is that it is not easy to clean. But its advantage is incomparable with 3 and 4, that is, it will not hurt the plate cylinder, and the running friction is due to the friction between the plastic rope and the plate cylinder.