Talking about cleaning methods and points for attention of water roller

Cleaning and protection of the water transfer roller and the water roller During the printing process, due to repeated contact between the water roller and the printing plate, after a period of time, the ink and other impurities are detached from the printing plate on the one hand, and the water roller is on the other hand. The surface of the velvet structure will be damaged, the water transfer roller in the process of water transfer, the surface of the velvet structure will be the same damage; the same time the water roller on the roller will pass through the roller to the water roller. Therefore, the water roller fleece must be cleaned or replaced in time to restore and maintain water absorption and water transfer performance.

First, prepare cleaning materials and tools

(1) cleaning materials: gasoline, water (preferably a pool with a tap);

(2) Tool nylon brush and steel sheet.

Second, cleaning

Put both ends of the removed water roller on the bracket (or wooden pillow) of the water roller, pour the gasoline on the roller surface, and use the plate brush to brush evenly in one direction (the direction of the silk of the water roller velvet); After the ink is dissolved, it is flushed with water until the roller surface is free of dissolved ink. Finally, the excess moisture is scraped off with steel.

(a) Cleaning of waterfighting sticks and water roller

The more common water roller is chrome plated. In the printing process, the ink stain on the water roller is also transmitted to the hydrophobic roller and the roller roller, which reduces the water transfer. In addition, when the downtime is long, even if the fountain roller and the fountain roller are not contaminated by ink, an oxide film is formed on the surface, and the surface of the roller absorbs oil mist and other impurities in the air, so that they are Some hydrophilic properties have changed. Therefore, the bucket roller and the squeegee roller must be cleaned in a timely and regular manner so as to restore its hydrophilicity and uniform water transfer.

Cleaning materials: pumice powder, fountain solution, glue, and wipes.

(1) Draw the dampening stock solution, and then pumice powder, and then rub it back and forth on the surface of the hydrophobic roller and the fountain roller. When the ink and oxide film are removed, quickly wipe the surface with a wet cloth.

(2) Jog the machine, go to the remaining uncleaned parts, and wipe it according to the appeal method until all the two rollers are cleaned.

(3) Use a water cloth to pick up the glue and wipe the surface of the roller.

(b) Cleaning of the bucket

Bucket is generally made of copper alloy material. The long-term use of the bucket will inevitably fall into the dust and other debris. At the same time, the bucket roller will also bring paper powder, paper hair, and ink stains into the bucket. This will not only reduce the wetting property of the fountain solution. , And will directly affect the printing quality of printed products.

1, cleaning steps

(1) Prepare clean water and a cloth, a brush, and a plastic tube.

(2) Remove the fountain roller

(3) Pour the water into the bucket and use a brush to stir up the contents of the bottom of the bucket. Then use the conduit (the principle of the connected device) to suck out the turbid liquid in the water. While watering, brushing and guiding the water until the bucket is basically clean, the bucket is thoroughly cleaned with a cloth.

(4) Install the fountain roller

2, easy to produce problems and precautions

(1) When disassembling the water roller, care should be taken to ensure safety. The disassembled water roller should be placed on the water roller bracket if it is not to be used or installed immediately.

(2) When cleaning the water transfer roller and the water roller, the direction of brushing and scraping should be consistent with that of the water roller velvet.