How to deal with rubber accumulation in the hottes

2022-08-24
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How to deal with rubber accumulation in printing

how to deal with rubber accumulation in printing: 1 The coating on the paper surface is not firmly adhered, and there is too much paper powder. The coating on the paper surface is uneven or the sizing is insufficient, and the paper surface is rough or there are many paddles under strong light. For the stacking rubber failure caused by this situation, in addition to adding an appropriate amount of additives, it can also be solved by appropriately reducing the printing pressure without affecting the quality of the print, and slowing down the speed during the printing process to reduce the peeling of the paper. If possible, first pass the white material through the empty drum to remove some paper wool and paper scraps on the paper surface. If the product allows, it will be better to pass the bright paddle first

2. One of the main reasons for stacking rubbers is that the ink viscosity is too high, which sticks the fibers and paper powder off the surface of the paper, thus piling up on the blanket. Solution: you can put an appropriate amount of additives or viscosity reducer into the ink to reduce the viscosity of the ink. The amount of additives should be controlled to avoid affecting the drying performance and gloss of the ink

3. The surface of the blanket is crystallized and too smooth. Through experimental comparison, the adsorption force of smooth rubber cloth on paper wool impurities is much greater than that of rough rubber cloth. Solution: thoroughly clean the surface of the blanket to restore its fluffy state, or choose the blanket with a slightly rough surface to get a better effect

4. Excessive emulsification of ink. After the ink is emulsified, the pigment will be separated from the suspended state and retained on the blanket to cause a heap of rubber or retained on the printing plate to cause a heap of plates. It can be seen that the ink on the ink roller is sticky and grainy, and the ink is Matt. By cleaning the ink roller, the treatment capacity of waste plastic matrix composites of the project can be appropriately reduced by 1t/H ~ 5t/h; The purity of recovered metal (aluminum, etc.) is ≥ 98%; Metal (aluminum, etc.) recovery ≥ 99%; Purity of recycled plastic ≥ 95%; Energy consumption per ton of treatment ≤ 10kW h; The purity of the recovered metal ≥ 98% should not break the ink viscosity. Readjust and control the ink balance to solve it

5. the drying speed of ink is too fast. When the ink layer on the ink roller of the unit is thin, the magnetic attraction is proportional to the volume of particles. After printing for a period of time, the ink roller heats up, making the drying speed of the ink too fast. Because the viscosity of the ink is the strongest when it is about to dry, the transfer rate decreases, and there will be a backward pull phenomenon, resulting in a rubber pile phenomenon. It can be solved through the following ways: A. reduce the temperature of the workshop and keep the humidity at about 65%; b. Add an appropriate amount of viscosity reducer or anti drying agent to the ink

6. Improper color sequence arrangement. The viscosity of the ink in the back color group is greater than that in the front color group. The back color group pulls down the ink in the front color group, causing accumulation, and even causing cross color in serious cases. It can be solved by adjusting the color sequence and adjusting the viscosity of the ink to make the viscosity of the rear color group ink slightly less than that of the front color group ink

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