Printing machine rubber roller purchase, use and maintenance experience sharing
1. Rubber Roller Purchase Management
In response to two failures caused by the rubber roller, the following countermeasures are proposed: First, conduct a thorough investigation and comparison of product quality from various manufacturers. Choose a reliable supplier known for consistent high-quality rubber rollers rather than just focusing on low prices. Second, establish strict acceptance standards. Use tools like micrometers and calipers to measure the dimensions of the rubber rollers accurately, ensuring only defect-free products are accepted. This helps avoid time-consuming printing issues and significant financial losses. Third, implement clear penalties for substandard rubber rollers to serve as a deterrent for both the materials department and suppliers.
2. Proper Usage of Rubber Rollers
Before starting the print run, check for any foreign objects between the rollers, ensure the rubber roller is intact, and confirm that the pressure between the rollers is even. Clean the rollers thoroughly before printing begins. During the printing process, maintain consistent contact between the rubber roller and the printing plate, ensuring even pressure across the entire surface. Regardless of the width of the printed material, lubricate the full surface of the rubber roller with ink or dampening solution as needed. Adjust the ink and water levels based on accumulation to maintain print quality. To prevent ink from drying too quickly, reduce the viscosity of the ink if possible, and avoid overuse of dry oil. Excessive dry oil can cause uneven ink transfer and damage the roller’s performance. After printing, disengage the roller from the printing plate to relieve pressure, preventing deformation of the rubber surface. Clean off any remaining ink promptly to avoid drying and buildup, which can damage the smoothness of the roller and lead to surface degradation.
3. Maintenance of Rubber Rollers
In many production environments, the maintenance of rubber rollers is often overlooked, leading to shorter lifespans, higher repair costs, and difficulty in maintaining print quality. Therefore, proper maintenance is crucial. First, newly manufactured rubber rollers should not be used immediately. Their internal structure may not be fully stabilized, so it's recommended to let them rest for a while to adapt to environmental conditions, improving their flexibility and durability. Second, ensure that the bearings and shafts of the rubber roller remain well-lubricated. Poor lubrication can cause wear and result in uneven ink distribution. Regularly apply lubricant to the bearings and shafts to protect the roller and ensure smooth operation. Third, use an idle protectant for ink rollers without an ink clutch during idling periods. These protectants are typically effective for 16 hours and should be reapplied after that time to prevent overheating damage. Fourth, store idle rubber rollers correctly. Wrap them in paper or plastic, support both ends on a roller frame, and avoid stacking or vertical placement. Store them in a cool, ventilated area at 10–30°C and 50–80% humidity. During transportation, avoid dropping or compressing the rollers to prevent core damage, ensuring they remain suitable for future refurbishment. (Editor: Liu Yidong)
The above content is excerpted from the journal “ Printing Technology · Digital Graphic Arts †of the Journal of Science and Technology Media , Issue 6, 2014. For more information, please visit the journal section. Welcome to download the iPAD version of “Keyin Journal.â€
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