Method for improving printing quality of printing machine

Abstract

The invention discloses a method for improving the printing quality of a printing machine. Upper and lower impression cylinders are arranged between upper and lower rubber cylinders; the upper impression cylinder is matched with the upper rubber cylinder, while the lower impression cylinder is matched with the lower rubber cylinder; each of the upper and lower rubber cylinders is covered with a stainless steel metal plate which is coated with an ink non-sticky ceramic coating, and a gap which is thicker than the thickest paper by 1-2 mm is formed between the upper impression cylinder and the lower impression cylinder; while printing, the paper passes between the lower rubber cylinder and the lower impression cylinder at first so that once reverse side printing of the paper is completed; and then the paper comes between the upper impression cylinder and the upper rubber cylinder so that once front side printing of the paper is completed. The method has the characteristics that: the paper is printed between the rubber cylinders and the impression cylinders; the impression cylinders are covered with the stainless steel plates each coated with the ink non-sticky ceramic coating; and the impression cylinders are hard so that the printed product is clear in dots and good in reducibility; and the paper is not easy to be deformed.

Description

technical field [0001] The invention relates to the technical field of printing machines, in particular to a method for improving the printing quality of printing machines. Background technique [0002] The printed matter that needs to be printed on both sides of the paper is usually printed twice. After one side is printed, the paper is turned over and then printed on the other side. Another method is to use a double-sided printing machine, and the paper enters the machine at one time to complete the printing on both sides; figure 1 As shown, a color group of this double-sided printing machine includes two upper and lower plate cylinders 1, two upper and lower impression cylinders 2, the impression cylinder 2 is covered with a blanket 3, and the upper and lower plate cylinders 1 are The graphic ink is transferred to the blanket 3 of the upper and lower two impression cylinders 2 respectively. When the paper 4 passes between the upper and lower two impression cylinders 2, o...

AI Technical Summary

Problems solved by technology

This type of machine is efficient, streamlined, and especially good at printed matter such as text and charts. Because it is in the form of "soft pressing and soft", the innate structure determines the dot clarity and reducibility of the printed matter, and the deformability of the paper is insufficient, and it is easy to produce ink. ghosting artifacts

Images