Printing ink drying system

Abstract

The invention discloses a printing ink drying system. The printing ink drying system is applied to a printing drying tunnel, and comprises a dehumidifying unit and a recycling unit; the dehumidifyingunit comprises a dehumidifying rotating wheel; an inlet of the dehumidifying rotating wheel is connected with an inlet of the dehumidifying unit; a drying gas outlet of the dehumidifying wheel is connected with an outlet of the dehumidifying unit; the recycling unit comprises at least one adsorption tank, a condenser and a drying fan; a first port of the adsorption tank is connected with the inletof the recycling unit; a second port of the adsorption tank is connected with an outlet of the recycling unit; a third port of the adsorption tank is connected with the condenser; a fourth port of the adsorption tank is connected with the outside; and a fifth port of the adsorption tank is connected with the inlet of the drying fan. By adopting the system, air is dried through the dehumidifying unit, and then enters the printing drying tunnel for drying; when used for drying, the dehumidified air can reduce drying temperature, save energy, and also facilitate the evaporation of moisture during a drying process; and the water consumption of a diluent is increased and the amount of alcohol usage is reduced. The recycling unit can be adopted to recycle the discharged alcohol and ammonia gas.

Description

technical field [0001] The invention relates to the technical field of printing energy saving and environmental protection, in particular to a printing ink drying system, especially a drying system for water-based ink in gravure printing. Background technique [0002] Gravure printing is to make the entire surface of the printing plate be covered with ink, and then use a special scraping mechanism to remove the ink in the blank part, so that the ink only stays in the cells of the graphic part, and then under the action of greater pressure , transfer the ink to the surface of the substrate to obtain printed matter. Traditional gravure printing usually uses solvent-based inks. Solvent-based inks contain ethyl acetate, isopropanol, n-propyl acetate, butyl acetate and other volatile organic compounds (VOCs for short). In addition, solvent-based oils In the process of use, it is also necessary to add a certain amount of VOCs to dilute the ink. During the printing process, these ...

AI Technical Summary

Problems solved by technology

[0006] (2) The drying speed must be fast

[0009] In view of the current situation of water-based ink printing, developing a low-cost dehumidification and drying system that can increase the drying speed of water-based inks, and at the same time solve the problem of ammonia and alcohol pollution in the drying waste gas of water-based inks, has become an urgent technical problem for those skilled in the art.

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