Coagulation-preventing circulation ink return system for gravure printing machine

Abstract

The invention belongs to the technical field of gravure printing equipment and particularly relates to a coagulation-preventing circulation ink return system for a gravure printing machine. The coagulation-preventing circulation ink return system which can effectively improve current gravure printing machine ink skin coagulation comprises an ink conveying roller and an imprinting roller. An ink plate for storing surplus ink at the ink conveying roller is disposed below the ink conveying roller. The ink return system further comprises an ink scraper disposed on the surface of the ink conveying roller and an ink supply component supplying ink to the surface of the ink conveying roller. The ink supply component comprises an ink pump. The ink inlet end of the ink pump is communicated with the ink plate and/or an external ink box. The ink outlet end of the ink pump points at the surface of the ink conveying roller. The ink return system further comprises a branch ink pipe. The inlet end of the branch ink pipe is communicated with the ink outlet end of the ink pump, the outlet end of the branch ink pipe extends into the ink plate, the outlet end of the branch ink pipe is parallel with the ink level in the ink plate, and the ink outlet direction of the branch ink pipe is horizontal. The coagulation-preventing circulation ink return system has the advantages that low cost is achieved, and ink skin coagulation and adhesion caused by unsmooth surface ink flowing of a traditional gravure printing machine can be improved.

Description

technical field [0001] The invention belongs to the technical field of gravure printing equipment, and in particular relates to a gravure printing machine anti-condensation circulation ink return system which can effectively improve the ink skin condensation phenomenon of the current gravure printing machine. Background technique [0002] The gravure printing machine is widely used in the film printing industry due to its advantages of thick ink layer, uniform ink color and long service life. When the gravure printing machine performs film printing work, it is necessary to insert the ink fountain cart equipped with the ink feeding roller into the socket reserved on the gravure printing machine, and rely on the roller surface cooperation between the ink feeding roller and the embossing roller on the main machine of the gravure printing machine . Afterwards, the printing film to be printed is pasted and passed through the gap between the above two rollers. During the progress...

AI Technical Summary

Problems solved by technology

The defect of the current above-mentioned structure is that: since the ink pump circulates and draws the ink in the ink cavity by bottom-end extraction, the bottom ink in the ink cavity flows fast while the surface ink flows slowly or even stagnates.

Moreover, because the ink supply system of the equipment is usually designed so that the lower half of the roller surface of the ink supply roller is directly immersed in the ink of the ink fountain cart, the ink skin is easily adhered to the roller surface of the ink supply roller and then brought to the printing film, forming a large piece Stains, destroying the uniformity of the original pattern or color on the printing film, forming waste products

Even a small amount of ink skin adhesion will form spots on the printed matter, which will affect the quality of the printed matter, and even cause the printed matter to be scrapped, wasting a lot of raw materials, destroying the smoothness of the printed matter production process, and increasing the cost of the enterprise

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