Experience on the need to control the temperature and humidity of printing paper

The printing press is very sensitive to paper. If the temperature and humidity control is not good, it can easily cause the paper to produce a flounced edge, which has an impact on the printing and paper printing and overprinting.

When the machine is in normal printing, the paper feeder, the front gauge, the gauge, the paper feeding system and the front gauge detection system are closely cooperated, but due to the reason of the paper or the adjustment failure, a few or even a dozen sheets of paper enter into the impression cylinder and the blanket cylinder. Sudden parking caused by the between, as boring cars, boring cars have a fatal impact on the printing opportunities, so need to arouse the attention of printing workers.

The main reasons leading to stuffy cars are: First, the gap is not adjusted well, including between the paper feed head and the paper feed platen, between the paper feed roller and the paper feed roller of the mechanical double sheet controller. The paper feed height of the paper feed table is not properly adjusted, and the thickness of the print paper is generally 3 sheets. Or the ultrasonic double controller and the oscillating rod mechanism fail, causing double sheets and multiple sheets. The second is that the paper is stuck so that a few sheets of paper are sucked up and conveyed at the same time, because the ink layer of the print is too thick or the paper is deformed. The third is the stumbling car accident. When the printing machine is working normally, if the paper arrives before the gauge is early, late, skewed, missing corners, curled, or lack of paper, the photoelectric detection immediately orders the front gauge to stop swinging to prevent the paper from entering the drum again. At the same time, the oscillating feed paper teeth do not pick up the paper, the machine decelerates, the roller presses off, the printing plate rollers lift up, the water transfer roller and the ink roller stop swinging. If the electrical control circuit fails, it is easy to roll a stack of paper between the impression cylinder and the blanket cylinder, and a stuffy car accident occurs.

Therefore, the printing company must have a special paper store to make the temperature and humidity of the storage place close to the printing shop. Such paper, after being cut and printed on the machine, has little influence on the printing quality and can ensure the smooth transport of the paper.