In the daily production of Komori series printing presses, dirtying, plugging, and patching on the plate are among the most common problems encountered by press operators and maintenance personnel. These Japanese-made machines are known for their stability, with mature H-UV drying and automatic registration systems, and uniform ink distribution through the inking unit. If not addressed promptly, the issue can range from affecting registration accuracy and print quality to causing prolonged downtime in severe cases.
I. Fault Symptoms: Non-image areas of the plate become dirty, dots are lost (patching), or the entire plate becomes plugged (plugging), indicating an imbalance in the water-ink equilibrium.
II. Cause Analysis: Improper dampening solution acidity/pH, insufficient water volume, low ink viscosity, severe emulsification, insufficient plate exposure/development, and excessive dampening roller pressure causing scumming. Given that Komori Japanese presses are known for their stability, mature H-UV drying and automatic registration systems, and uniform ink distribution, priority should be given to checking key components and standard parameters during troubleshooting.
III. Treatment Steps: Stabilize the pH of the dampening solution and increase water volume for trial running; adjust ink viscosity or change the formulation; re-expose the plate and recheck exposure/development; calibrate dampening roller pressure and clean the roller nap.
IV. Preventive Measures: Stabilize dampening solution parameters, control the emulsification rate, and standardize the plate-making process. The above methods also apply to models such as LS440, LS629, Lithrone, GL840, and G40. For practical operation, refer to the PQC Print Quality Control system / KMS console and on-site conditions. In complex situations, it is recommended to contact professional maintenance support through the printm.cn platform.
