UV Bottom Coater Overview
UV Bottom Coating (UVBC) systems apply a protective coating to the bottom rim of aluminum cans. This coating is critical for improving can mobility through high-speed conveying and at the filler.
Process Overview
After cans are washed and dried, they are elevated to the upper level of the can line. From there, they enter the UVBC system in mass flow. A vacuum transfer device picks up the cans, exposing the bottom surface.
The bottom coating is applied using a roller system, ensuring a consistent and even layer of material around the nose of the can’s rim. After coating, a UV LED light system cures the coating instantly. Some systems, such as those offered by Roeslein, are available with either UV LED or Microwave UV curing options.
Purpose and Importance
The Bottom Rim Coating plays a vital role by:
- Allowing cans to slide more easily along their bottom rim.
- Reducing friction during downstream conveying.
- Improving stability at the filler, where filled cans are heavier and more prone to tipping without proper mobility.