Proper Installation & Maintenance of Ejection Rubber: Maximize Performance & Service Life
Many die-cutting problems blamed on poor-quality ejection rubber are actually caused by incorrect installation and maintenance. Even the highest-performance rubber will fail prematurely if applied improperly, leading to unnecessary costs and production disruptions. Shenhua Printing, with over a decade of industry experience, has compiled a comprehensive guide to ejection rubber installation and maintenance, helping printers get the most out of their consumables.
The first critical step is proper surface preparation. Before applying ejection rubber, the die plate must be thoroughly cleaned with isopropyl alcohol to remove all oil, grease, paper dust, and old adhesive residue. Any contaminants on the surface will prevent the adhesive from bonding properly, leading to rubber shifting and peeling during production. The plate should be completely dry before application to ensure maximum adhesion.
When applying the rubber, never stretch it to fit the die line. Stretching damages the rubber's molecular structure, causing it to shrink and curl at the edges and lose rebound performance. Instead, cut the rubber to the exact length needed and apply it naturally without tension. Use a rubber roller to press firmly along the entire length of the strip, removing any air bubbles and ensuring full contact with the die plate. For best results, leave the assembled die plate for 24 hours before use to allow the adhesive to fully cure.
During production, avoid excessive die pressure, which is the single biggest cause of premature rubber failure. Increase pressure gradually until the substrate is cut cleanly—any additional pressure will only compress the rubber unnecessarily and accelerate permanent deformation. When the machine is not in use for more than 24 hours, release the die pressure to prevent the rubber from being compressed continuously.
Regular inspection is also essential. Check the rubber daily for signs of wear, indentation, cracking, or peeling. Replace any damaged sections immediately to prevent die blade damage and product defects. Unused rubber should be stored in a cool, dry place away from direct sunlight and heat sources, and used within 12 months of manufacture.
Shenhua Printing provides free on-site training for all our customers, teaching proper installation and maintenance techniques. Our technical team is also available 24/7 to answer any questions and help troubleshoot issues, ensuring that your ejection rubber performs optimally throughout its service life.