How to solve the problem of unstable Paper Box quality caused by clogging of anilox rollers

How to solve the problem of unstable Paper Box quality caused by clogging of anilox rollers

In production, it is really a headache for ink to block the ink hole. Only with a 10x or 20x magnifying glass can the ink hole blockage be clearly observed.

1. Three reasons can cause the anilox roller to be blocked

Anilox roller is blocked

1. When replacing the printed parts, the anilox roller is not cleaned thoroughly

2. Long time shutdown, no cleaning of the anilox roller

3. The ink drying performance is too fast

"If a worker wants to do a good job, he must first sharpen his tools." Therefore, in order to maintain the accurate transfer of ink volume, the anilox roller must be properly cleaned.

2. 5 cleaning methods are essential

1. Chemical solvent brushing method

Spray the chemical solvent on the surface of the anilox roller, select a suitable fine brush according to the material of the anilox roller (stainless steel brush for ceramic anilox roller, copper wire brush for metal anilox roller), and brush repeatedly with brush. This method is only suitable for cleaning anilox rolls with coarse mesh lines. The advantages are low cost, easy cleaning, and no environmental pollution; the disadvantage is that it cannot penetrate deep into the ink hole for brushing, so the cleaning is not thorough. It is difficult to clean the dirt and ink accumulation at the bottom of the ink hole. Therefore, the ink hole volume cannot be recovered.

2. Chemical solvent immersion method

All or part of the anilox roller is invaded into the tank of high pH strong corrosive cleaning agent, so that the solvent dissolves, softens and solidifies the ink, and finally washes off the corrosive cleaning liquid and the fully corroded and softened ink with clean water. Although this method It is more effective, but for long-term use, corrosive solvents will penetrate the protective layer and corrode the steel body, which is not conducive to environmental protection.

3. Ultrasonic cleaning method

The anilox roller is immersed in a tank of an ultrasonic cleaning system filled with chemical cleaning solution. The frequency conversion device in the tank sends high-frequency sound waves to make the solution vibrate and generate air bubbles. The dry ink, resin and coating material in the ink cavity vibrate in the solution. Under the combined action of the inward explosive force generated by the directional explosion surface of the bubble, it flows away from the ink hole and with the cleaning liquid. The cleaning time depends on the size of the roller and the ink blockage, generally 0.5-24h. During this time, the anilox roller is subjected to high-frequency ultrasonic vibration for a long time, which will destroy the ceramic layer, and will cause certain damage to the ink layer and the ink cavity of the anilox roller. In addition, this method occupies a large area, has high investment cost, and has a complicated process. Although it has a certain cleaning effect, whether this method is perfect still needs to be tested in practice.

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