| 摘要 |
Device comprising, in its intermediate part, a ring 10 for intensive blowing, the flow 7 of which is directed towards the tubing 1 and, in its upper part, a top chamber 14, 15 in which the tubing 1 is in contact with a flow of air directed in the direction of drawing of the tubing. The device according to the invention furthermore comprises, in its lower part, a non-closed bottom chamber 3, 4 provided with at least one opening and the ring 10 for intensive blowing is constituted so that the angle A, defined between the axis perpendicular to the tubing and the direction of the flow of air 7 leaving the ring, lies between 0 and 85 DEG . Application to the manufacture of plastic film by the blowing of tubing. <IMAGE> |
