VORRICHTUNG ZUR HERSTELLUNG EINER VORFORM FÜR LICHTLEITFASERN DURCH CHEMISCHE ABSCHEIDUNG

A device for manufacturing a preform of glass material for optical fibres comprises a chemical deposition chamber (3), at least one burner (4) mobile along a direction Z and adapted to deposit a chemical substance on at least an elongated element positioned along an axis Z-Z, at least one suction element (6) mobile along the direction Z for collecting exhaust chemical substances, a collector tube (70) associated with the at least one suction element and adapted to discharge the exhaust chemical substances outside the chemical deposition chamber through an exhaust opening (Sa) formed on a wall of the chamber, and a coupling device (73a, 73b, 76) between the collector tube and said wall at the exhaust opening, allowing sliding of the collector along the direction Z and along a direction X towards/away from the axis z-z.