Carton printing if there is a layout graphic dirty, paste version or local graphic imprint unclear quality problems, Pinshang machinery to analyze what causes?

　　1、Quality failure caused by poor machine imprinting associated parts
　　When the plate roller cylinder head, impression roller head, drive shaft, gears and important parts associated with imprinting wear, loosening, in the imprinting process of the plate roller or imprinting rollers will produce jumping or sliding phenomenon, due to the pressure is not stable, resulting in the contact between the printing plate and the cardboard is not normal, resulting in the cardboard printing surface appears paste or local graphic imprinting problems. Through careful observation and analysis, to identify the exact location of the fault, take appropriate measures to deal with the wear and tear, loose parts to be repaired to eliminate the fault phenomenon.

　　2, the quality of the ink roller caused by poor failure
　　When the inking roller axle head loose, inking roller roller body bending, deformation or surface damage, will also cause dirty layout, paste version or local graphics are not clear. Should identify the cause, take appropriate measures to deal with, so that the inking roller and the printing plate to maintain uniform and appropriate contact conditions between the damaged inking roller to be replaced, in order to eliminate the failure phenomenon.
 
　　3, the pressure roller improperly adjusted quality failures caused by
　　If the position of the pressure roller is too high or too low, so that the contact with the corrugated cardboard is too tight or too loose, there will be a dirty plate, a muddy plate, or a localized graphic imprint that is not clear. The pressure roller should be adjusted to the proper position, so that the gap between the pressure roller and the roller is compatible with the thickness of the cardboard, in order to ensure that the printing layout of the part, to avoid the failure phenomenon.

　　4, improper color sequence caused by quality failures
　　If a fuller layout is arranged in the first color group for printing, when the corrugated cardboard enters the next color group in the printing process, due to the large amount of inking and slow drying speed of the printed graphics in the first color group of the cardboard, it is extremely easy to transfer the printing to cause the layout to become dirty. In order to prevent this drawback, it is appropriate to arrange a small area of the layout in the first color group printing, large area of the layout arranged in the subsequent color group printing, can avoid the transfer of prints caused by dirty plate phenomenon.

　　5, uneven thickness of the printing plate caused by quality failures
　　When the thickness of the rubber plate material is not uniform, the plate layout will appear high and low differences. Plate high place is easy to paste the plate, plate low place is easy to ink incomplete, resulting in unclear print, in order to avoid the occurrence of this undesirable situation, can be used sporadic version of the way the plate is made into a number of small pieces (refers to the kind of rubber plate material for the sake of saving without making the plate core plate making process), should be used in the same piece of plate material respectively, so that it is a small difference in the thickness of the plate. If the rubber plate has been made, there is a difference in thickness, can be in the local thin plate on the back of the more adhesive tape layer to make up for the whole plate to maintain a basically uniform thickness, to ensure that the printing pressure and the layout of the inking of the uniformity.
　

6.Quality Failure Caused by Uneven Thickness of Corrugated Cardboard
　　If the surface of the corrugated cardboard is man-made and damaged by depressions, the paper surface of the depressions will have unclear print quality defects. If the printing pressure is increased to make up for the uneven thickness of the corrugated cardboard, it will be easy to make the text and line layout appear as a quality problem. In order to avoid the layout of the paste, corrugated cardboard in the stacking, handling process, should pay attention to light moving, light put, light pressure (to control the height of the stacking), do not use throwing, smashing, pressure, and other bad habits of production for handling.