Metal Industry

Misalignment of Steel Plate and Film

When a film charged with static electricity during roll transfer approaches a steel plate, it is attracted to the plate by the Coulomb force working on the induced charge on the plate.
Once the film and plate cling to each other, the force of attraction is so strong that their positions cannot be changed and they are affixed in misaligned positions.

Misalignment of Steel Plate and Film

Conventional countermeasures

Handled by workers

  • Cost rise due to increased labor cost
  • Long takt time

Countermeasures with static eliminators (ionizers)

It reduces cost and saves takt time.

Countermeasures with static eliminators (ionizers)

Improvements and Effects
Words from the worksite

Reduced labor cost for addressing the problem

Labor cost per line $200/month x 10 lines x 12 months = $24,000/year

Although calculation of the takt time is difficult due to the relation with the previous and next lines, it has definitely been improved.