Analysis of working principle of uniform and even ink mechanism of offset printing machine

3.3 Further analysis of working principle of uniform water and even ink mechanism

1. Weekly uniform, even ink

If there is a drop of water or ink on the roller, as shown in Figure 3.17.

(Figure 3.17)

When it runs between the two rollers, it is squeezed into a flat shape, and the water or ink on the rollers actually stays on the surface in this shape. When pressed against each other, water droplets or droplets spread to the surroundings. If the water droplets or ink droplets are unevenly distributed on the roller, even if they are squeezed, they will not be completely leaned together, and the water and ink cannot be guaranteed to be even.

(Figure 3.18)

2. Axial uniform, uniform ink

When the water droplets or ink droplets are on the roller, as shown in Figure 3.19 (above left), one of the droplets moves, then the droplet becomes as shown in the right figure, pulling it axially. Just pulling it axially does not guarantee its uniformity.

(Figure 3.19)

3. Axial and circumferential simultaneous water, even ink

Axial and circumferential uniform water, uniform ink, then the water droplets or ink droplets spread to the surrounding, and was pulled away axially, the largest spreading surface, as shown in Figure 3.20, so that water or ink becomes more uniform .

(Figure 3.20)

Due to the good fluidity of the water, the water can be extremely short when the microscopic unevenness can be automatically found. The fluidity of ink is relatively poor. When the microscopic inequality is difficult to level up, it can only be balanced by the uniform ink system. Therefore, the ink path is generally long.

4. The principle of even water and even ink on the water roller or ink roller

When the water roller or ink roller is used to apply water or ink to the plate, the surface becomes uneven, as shown in Figure 3.21. If you do not mix it, there will be no guarantee of a good supply or supply of ink at the place where the plate will be printed next week. Therefore, the uniformity of water and ink on the surfaces of the water roller and the ink roller is particularly important. Therefore, the water roller or the ink roller directly contacts the water roller or the ink roller.

(Figure 3.21)