What is the effect of various parameters setting of anilox roll on coating amount of coater?
Anilox roll has the characteristics of high cost and wear resistance. If it is used properly, its service life can be as long as several years; if it is not used properly, not only the service life will be shortened, but also the anilox roll will be scrapped.
Now most of the medical aluminum foil printing and coating machines use the roller coating device, also known as the wire coating method.
When the aluminum foil coating machine is used for printing and coating, the structure principle and working state of the anilox roller are as follows:
When the adhesive is filled into the hole of the roller, the roller rotates. When the hole leaves the adhesive surface, the liquid on the smooth surface of the roller is scraped off by the scraper, and only the liquid in the concave hole is retained. The liquid adhesive contacts with the surface of the coated aluminum foil substrate again. This contact is realized by the action of an elastic rubber roller. In this way, the surface of the roller can not be scraped off Part of the adhesive solution in the cavity is transferred to the surface of the aluminum foil substrate. Due to the fluidity of the adhesive, it will slowly and automatically level on the surface of the aluminum foil, making the original discontinuous liquid into a continuous and uniform liquid layer. Obviously, if the roller in the net line per inch less, net hole shallow, filled with less adhesive volume, the coater coating amount is relatively small. And the roller mesh hole shape is different, then the coater coating amount is also different. For the anilox roll that has been finished in the actual printing and coating of coater, the depth of the hole and the number of the wire mesh have been fixed, and the shape of the hole mesh will not change. Under this condition, the coating amount depends on the preparation of the adhesive and the concentration and density. We know that the coating amount of the coater is the amount of dry film bonded solid material per square meter of aluminum foil substrate area. Therefore, if the solid content of the adhesive solution is high, the dry film bonded solid material applied to the aluminum foil substrate will be more, and the coating amount of the coater will be more.