| 摘要 |
The invention relates to a thermoforming device for heating a plastic film (200) to a substantially uniform temperature, in order to impart a curved shape to said film. The device includes a chamber (100), the internal pressure of which is variable and which is closed by the film, a system (300) for measuring a sag (f) in the film arranged outside the chamber and opposite said film, and a system for heating the film. The heating system includes a hot air blowing unit (20-62) which is suitable for producing a hot airflow (F2) flowing parallel to the film between two opposite edges (C1, C2) of said film. |
