Heated chrome rolls used in the plastics industry normally require heat treatment to remove occluded hydrogen from the chrome deposit. If this is incorrectly managed the hydrogen can percolate out of the chrome and cause defects in the form of tiny bubbles in the plastic sheet or film.
To save customers wasting production time pre-heating the rollers in their machines prior to use, we can treat rolls in a specially constructed temperature controlled oven. We heat the rolls to a precisely controlled thermal ramp and record the temperature profile data. During the heat treatment process, the rolls are hung vertically to eliminate any risk of distortion.