Production steps in vacuum forming
Heating panels heat the plastic sheet until the material becomes thermoplastic. During the heating phase, the material is constantly monitored by radiation pyrometers.
After the heating phase, the heating panels move back. The sealed mould chamber is filled with compressed air. The labile material yields to the pressure and is pre-stretched homogeneously. The aluminium mould then moves into the hemisphere.
As soon as the mould is in position, the air between the material and mould is extracted by vacuum so that the material assumes exactly the shape of the mould. Ventilators cool the material down again (monitored by radiation pyrometers), the clamping frame opens and the moulding can be removed. The production process is under complete control at all times. The system warrants the ideal material temperature.