With the continuous improvement of science and technology, the coating machine has improved processing technology and work efficiency. Now it is developing rapidly in the market, which has driven the development of some industries, especially in electronic coating, or glue coating and the like. , or packed in cartons, these coating machines will be used more, and new technologies will be introduced continuously, and the environmental protection processing will be more powerful!
The function of the coating blade of the coating machine is to measure and control the desired amount of coating on the surface of the paper and remove excessive coating. This process can improve and enhance the smoothness and gloss of the surface of the coated paper.
To achieve the above goals,
1. It is the requirement for the quality of the coating machine scraper. The working face of the coating blade must be free of crack defects and must have a uniform - and the same anti-friction performance (abrasion resistance) across the entire coating surface banner, so as to maintain the same surface of the coated paper after the coating process. quality.
2. Talk about the importance of the material supply space: when the paint is applied by the scraper, 85-95% of the paint will flow back to the paint storage system, so there must be enough space in this area to complete the feeding and return.
3. How to avoid the occurrence of backflow: After the paper web is coated with a blade, the coating begins to dehydrate and gradually solidify - forming a "semi-dehydrated coating area", where the coating is gradually dehydrated along the direction of the base paper. When the paint is further dehydrated to form "pre-coating" or "drained bread", the knife pressure of the scraper will "transfer" the shape of the coating scraper surface to the surface of the paper coating. The pressure is the highest, so it is easy to form a thin coating behind the tip of the knife. Excessive pressure or poor paint rheology can cause backflow here. Therefore, it is necessary to adjust the knife pressure reasonably according to the site conditions to avoid backflow. The coating process of the coating machine is a process that seems simple but is actually cumbersome. It needs to be done carefully in every step to achieve perfect control.
