7.5 Waterway troubleshooting
Waterway troubleshooting is similar to Molu troubleshooting. The ideal state of the waterway is: the water layer is uniform and stable, with the least water consumption. The benchmark of the waterway is also the impression cylinder, and its adjustment should also follow the benchmark principle. The general method of waterway troubleshooting is analyzed below through the transmission chain diagram of the waterway.
1. Leaky water bucket
(1) Re-welding or replacing the water bucket when it is broken;
(2) The backwater of the water bucket is not raised. Clean the backwater pipe and make it smooth.
(3) The water bucket is not suitable for re-installation.
2. The water bucket is not on water
(1) After the oily material accumulates on the water bucket rollers, wash and then add water;
(2) The water in the bucket is not in contact with the water surface. Too little water in the bucket, add water;
(3) The water bucket roller and the edge of the water bucket rub against each other to reinstall the water bucket;
(4) The acidity of the fountain solution is too weak to increase the amount of wetting ingredients;
(5) The water bucket roller does not rotate or the rotation speed (rotation angle) is too low to increase the rotation speed.
3. The water transfer roller does not transfer water
(1) The pressure between the water transfer roller and the water bucket roller is too small to increase the pressure;
(2) The pressure between the water transfer roller and the water verification roller is too small, increase the pressure F
(3) The bearings at both ends of the water transfer roller are damaged and replaced;
(4) The pressure between the water transfer pan and the bucket roller is too large, squeeze the water to reduce the pressure;
(5) The pressure between the water transfer roller and the water roller is too large, squeeze the water to reduce the pressure;
(6) The water glue city above the water transfer roller is polished to replace the water glue fleece;
(7) There are oily substances on the water limbs to clean the water glue city.
4. Poor work of skewer roller
(1) Check the working state of the single-end mechanism if the series momentum of the water-squeezing roller is too small or does not move;
(2) The surface of the water string roller is not cleaned and washed before printing;
(3) Dehydration replacement rate water roller on the surface of water string roller.
5. Poor work of the water roller
(1) The pressure between the water roller and the printing plate is too small to increase the pressure;
(2) The pressure between the water roller and the printing plate is too large to reduce the pressure;
(3) The pressure between the water roller and the water roller is too small to increase the pressure;
(4) The pressure between the water roll and the water roll is too large to reduce the pressure;
(5) The other faults of the water roller are the same as the water roller.
6. Poor water transmission of the printing plate cylinder
(1) The blank part of the printing plate does not absorb water, and the graphic part does not absorb ink. Replace the printing plate;
(2) Other failures and troubleshooting methods of the printing plate cylinder are the same as those of the ink path.
7. Poor water on paper
(1) Uneven water absorption on the surface of the paper causes too much water on the surface of the blanket to replace the paper;
(2) Too much water absorption on the surface of the paper causes deformation of the paper and greatly reduces its tensile strength;
(3) There is oily substance on the surface of the paper, which causes poor water or ink. Check whether there is oil mist in the air flow from the presser foot or nozzle. If there is oil mist, the air pump should be repaired; otherwise, replace the paper.
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