How to improve the speed and quality of offset pre

2022-08-09
  • Detail

How to improve the speed and quality of thin paper printing by offset press

when printing thin paper by offset press, there are some suggestions: 1) when tapping, the method of thin paper and thick paper (100-350g/㎡) is different, the thin paper is easy to clamp, and the tapping is uniform and flat. The operating knowledge of oil delivery and oil return of hydraulic universal testing machine between the tapping sections is the smaller the better, and the spacing is the best, so as not to cause wrinkle. Generally, for the paper that is eager to be printed on the machine, only knock the drag tip to keep its mouth flat so that the paper can be fed smoothly. 2) The paper presser foot should be smaller than that when printing thick paper. Generally, it can be pressed by about 5mm. 3) The paper feeding wheel shall be adjusted as light as possible, based on the smooth rolling of the paper wheel when the paper passes, so as to reduce the resistance and prevent the paper from curling. 4) For machines with better optical control system, such as gaobao and Komori series offset printing machines, the paper dust at its mouth should be cleaned in time, preferably once a shift, so as not to affect the sensitivity of optical control and cause the machine to stop for no reason. Because, for thin paper printing, light control function is more important. 5) The temperature and humidity of the printing workshop should be consistent with that of the paper warehouse to prevent the paper from ruffling or shrinking, which will affect the smoothness of overprint and paper feeding. Enterprises with conditions can achieve better results by using air conditioners or air humidifiers. If there are no conditions, they can improve the printability of paper by watering and drying paper. 6) When printing thin paper, it is better to print a little faster, and the paper receiving system and paper feeding system will be more flat. If you want to extend the service life of the equipment, it is stable. Generally speaking, the machine with the maximum machine speed of 10000 prints/hour can be improved by setting the speed of 6500 prints/hour; For a high-speed machine with 15000 prints/hour, it is better to set the printing speed at 9500 prints/hour

Copyright © 2011 JIN SHI