Brief analysis of drying heat source of gravure printing machine
As the ink of gravure printing is relatively thick,when one color printing is finished,the drying system must be used to make the ink solvent on the printed matter evaporate and dry rapidly,so that the ink is fixed on the substrate.Each color should be dried and the drying speed of the ink should match the printing speed.
The drying method of gravure printing is generally hot air drying.This drying device consists of a heating device,a ventilation device and an exhaust port.The printing sheets are dried through the hot air drying room.The drying speed is controlled by adjusting the air volume.With this drying device,the deformation of the printing sheet is small,which is conducive to ensuring the quality of printing products.After the printing sheet is dried by hot air,it should generally be cooled by the cooling roller.
At present,the drying heat source of gravure printing press mainly includes the following options:
1.Heat the drying process through the electric heating tube.
2.Drying process by high temperature steam
3.Drying process through coal-fired boiler
4.Drying process by durning diesel oil
5.Use covio hot air dryer as the heat source to carry out the drying process
