03/2016 Challenge A corrugated packaging plant located in California (USA) was having issues with poorly bonded board after starting up from a stoppage of any duration, resulting in excessive waste and lost production. Kadant identified the root cause to be thermal bowing of the lower corrugating roll. The thermal bowing caused the glue roll gap to change as the roll turns. A larger- than-required glue gap results in too little starch applied to specific locations on the medium on each rotation leading to a poor bond between the liner and the medium. Solution After completing a steam system study, Kadant recommended a managed differential pressure control strategy for the lower corrugating roll and upgrading to the Corr-Pro ® rotary joint with a rigid stationary

Join for free to read