| 摘要 |
Process for manufacturing carbon fibres, of the type comprising a first spinning step of a fibre of PAN precursor and a second oxidation/carbonisation step of said fibre and the plant thereof. The spinning and oxidation/carbonisation steps are performed directly in line and continuously, and hence without any stocking buffer area of a PAN precursor between the two steps. The spinning step is performed at low speed, so that the output speed from the spinning step, downstream of the stretching operations, is a speed falling within the range of the suitable processing speeds in the subsequent oxidation/carbonisation step. Moreover, the spinning step is performed in a modular way on a plurality of spinning modules (M) aligned in one or more rows (A, B), each spinning module (M) having a productivity not above 10% of the overall productivity of the spinning step. In any individual spinning module (M), the fibres downstream of the spinning area follow zig-zag, rectilinear paths through deviation and driving rollers (3-5), both in a horizontal direction and in a vertical direction, along which paths the various spinning treatments are carried out. Finally the fibre tows coming out from each spinning module (M) are arranged side by side, without undergoing transversal deviations with respect to the progress direction thereof, to form a single belt (N) feeding the oxidation/carbonisation step. |
