In daily production on Beiren (BEIREN) series printing presses, ink-roll washing and ink smearing in the ink train is one of the most common problems encountered by press operators and maintenance personnel. As a representative domestic offset press, this model features strong parts interchangeability, low maintenance costs, and mostly domestic PLC-controlled electrical systems. If the issue is not addressed promptly, it can at best affect registration accuracy and print quality, and at worst cause extended downtime.
1. Fault symptoms: incomplete color change, hardened ink buildup on ink rollers, uneven ink smearing, and noticeable front-to-back differences in ink density.
2. Cause analysis: incomplete cleaning of ink rollers, improper smearing time/stroke settings, worn ink roller diameters, and poor ink compatibility. Given that the Beiren press is a representative domestic offset press with strong parts interchangeability, low maintenance costs, and mostly domestic PLC-controlled electrical systems, troubleshooting should prioritize checking key components and standard parameters.
3. Parts replacement specifications: follow the color-change washing procedure and use dedicated wash-up solution; verify smearing stroke and time; measure and replace worn ink rollers; select compatible inks.
4. Consumable parts checklist: for ink-roll washing and smearing issues, it is recommended to keep in stock: relevant bearings/bushings, Beiren-compatible sensors and suction nozzles, seals, and standard wear rollers. When replacing, always use original or certified parts and verify model numbers.
5. Preventive measures: always wash at every color change, perform periodic deep cleaning of ink rollers, and record ink roller diameters. The above methods also apply to Beiren 300, Beiren 400, PZ4880, N300 and similar models. For actual operation, refer to the domestic CNC system / centralized lubrication control and on-site conditions. For complex situations, it is recommended to contact professional maintenance support via the printm.cn platform.
