| 摘要 |
A stretching apparatus of fibre tows in a pressurized steam environment comprises an elongated stretching chamber (2) having a generally rectangular section of a low height, within which the tows (T) are treated with saturated or overheated steam at high temperature and pressure and simultaneously undergo a mechanical stretching operation. The stretching chamber (2) is of a width sufficient to house multiple tows (T) mutually flanked in a running plane and is formed within a stretching chest (1) made of aluminium. Said stretching chest (1) is housed in a supporting structure (3-9), having a higher structural rigidity than the stretching chest (1), which comprises a plurality of contact elements (8-9) apt to determine a predefined position of the stretching chest (1)' with respect to a direction perpendicular to the tow running plane (z axis) and to allow a limited mobility of the stretching chest (1) in the other two mutually perpendicular directions which lie in said plane (x and y axes), length and width respectively, sufficient to allow the free thermal expansion of the stretching chest (1) in these two directions while maintaining the same planar notwithstanding the effect of inner stresses apt to cause arching or twisting of the stretching chest (1). |
