The gravure printing ink layer is thicker than the offset printing, when the color is printed after the ink solvent drying system must be used in the printing, rapid evaporation drying, the ink on the substrate. Each color should be dry, and to ensure that the drying rate of ink and printing speed match.
Drying method of gravure printing general hot air drying, the drying device is composed of a heating device, and exhaust ventilation device composed of hot air drying chamber, a sheet from the hot air drying chamber through drying. The drying speed is controlled by adjusting the air volume. The drying device, sheet deformation small, to ensure the printing quality. Zhang India after hot-air drying by general cooling roll cooling.
Now the drying source of gravure printing machine mainly has the following options:
1) drying process by electric heating tube;
2) drying process by high temperature steam;
3) drying process of coal fired boiler;
4) drying process by burning diesel oil;
5) the use of kovio air dryer as a heat source for drying process. |
