Glazing device for sheet-fed printing press

Abstract

The invention discloses a glazing device for a sheet-fed printing press, which can avoid set-off caused by contact between printed matter and a glazing roller. The glazing device comprises the glazing roller, a driving cylinder, a clutch pressure shaft, a pair of swing arms, a pair of connecting rods, a pair of supporting shafts and a pair of swing frames. A cylinder body of the cylinder is arranged on a wallboard at one side; the clutch pressure shaft is bridged between wallboards at both the sides of the printing press; the rotating centers of the pair of swing arms are respectively connected to both ends of the clutch pressure shaft; one end of one swing arm is connected with the end of a piston rod of the cylinder; one ends of the pair of connecting rods are respectively and movably connected with the other ends of the pair of swing arms; the pair of supporting shafts are respectively fixed on the outer lateral surfaces of the wallboards at both the sides; the pair of swing frames are respectively and fixedly sleeved on bearing seats at both ends of the glazing roller; one ends of the pair of swing frames are respectively and movably connected with the other ends of the pair of connecting rods; the other ends of the pair of swing frames are respectively and rotatably connected with the pair of supporting shafts; when the piston rod of the cylinder extends and retracts, the swing frames drive the glazing roller to rotate around the supporting shafts.

Description

technical field [0001] The invention relates to a coating device for a sheet-fed printing press. Background technique [0002] At present, the glazing cylinder 52 and the impression cylinder 53 in the glazing device on the printing machine mainly adopt the structure of the eccentric bearing, and the glazing cylinder 52 is installed on the eccentric bearing 9'. By changing the center position of the eccentric bearing 9', The glazing cylinder 52 can be separated from the impression cylinder 53 by a certain distance, so that the printed matter 55 can pass through the glazing color group smoothly when the printed matter 55 is not subjected to glazing treatment. Because this glazing device is limited by the size of the eccentricity of the eccentric bearing 9', the distance L1 between the glazing cylinder 52 and the impression cylinder 53 is relatively small (see figure 1 ). When the printed matter 55 passes through, the printed matter 55 is likely to be in contact with the glaz...

AI Technical Summary

Problems solved by technology

When the printed matter 55 passes through, the printed matter 55 is likely to be in contact with the glazing cylinder 52, causing printing failures such as smudges on the printed matter 55. In addition, because the ink is not completely dry for the printed matter, if the printed matter is in contact with the glazing cylinder, it will Make the surface of the glazing roller stick with ink, which will cause printing failures such as ghosting in the printed matter printed later, and the glazing roller needs to be cleaned frequently, which makes the printing machine unable to perform continuous printing and affects the working efficiency of the printing machine

Images