In cold forming, ROHACELL® is fixed cold on a die by means of a vacuum, heated in an oven to the forming temperature, and slowly cooled. This allows relatively precise production of 3D shapes. The smallest possible bend radius is approximately twice the panel thickness. Due to restoring forces, however, the panel must be held in form during subsequent processing.
Hot forming is a cost effective method for producing 3D shapes rapidly and economically. At a temperature between 175 °C and 220 °C, depending on grade and density, ROHACELL® becomes thermoelastic and moldable.