The ink conveying device of the printing press requires that the ink coating should meet the needs of the printed matter, with good continuity and stability. It should not only meet the pattern, but also meet a certain uniformity.

The normal working clearance between the ink bucket roller and the ink knife is about 0.01-0.02MM (< 0.03mm). It has high precision and small fitting clearance. The surface scratch will affect the accuracy and ink output of the ink bucket roller. In the process of use, there are impurities in the ink. Once these impurities are collected at the bottom of the ink bucket, they will scratch the surface of the ink bucket roller. Generally, ink leakage mostly occurs in the contact area between the ink bucket stop and the ink knife. Due to long-term wear, ink leakage occurs at the joint. In serious cases, the ink bucket roller must be removed and sent to a special processing unit for reprocessing.

Key points for on-site repair of ink bucket roller scratch of printing machine:

1. Check the wear of the roll surface, and mark the severely worn groove and point depression with a marker pen.

2. The site does not have the conditions for hot work. The oil stain on the roll surface needs to be thoroughly cleaned with alcohol until there is no obvious stain after wiping with white cotton yarn.

3. During the repair process, ensure that the materials in each gap are filled evenly and densely.

4. After the material is cured, the roller surface shall be polished.

On site repair steps of ink bucket roller scratch of  printing machine:

1. Use absolute ethanol to clean the oil stain on the roller surface of the ink bucket roller and in the groove, and mark the groove to be repaired with a marker pen.

2. Use a grinder to deep the repair groove ring, and clean the residual metal in the groove with a saw blade.

3. Fine treatment of repair surface: brush dipped in alcohol to fine clean the repair groove and the surrounding roll surface, and the roll surface and the interior of the groove are clean and free of oil.

4. Blend soray carbon nano polymer material, apply it to the coverage of the repair groove, and scrape it with a knife edge ruler.

5. After the material is cured, remove the excess material and check whether the material height is flush with the roll surface.

6. Polish the roller surface with polishing machine or metallographic sandpaper to improve the smoothness of the repair surface, and the repair is completed.

Tom (oversea manager) Phone:0086 13303078975 / 17772697357(whatsapp,wechat,line)

Email :cartonmachine.tomwang@aliyun.com

https://www.wdcartonmachine.com