C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/8.4
C03B 37/06 (2006.01) D01D 5/08 (2006.01) D01D 5/098 (2006.01)
Patent
CA 1331919
ABSTRACT Facility for generating fibers, in particular mineral fibers, from a molten mass In an unraveling facility according to the blast drawing process a subsonic diffuser (11) is arranged following the blast pipe (6). The subsonic diffuser (11) is designed as a thrust diffuser with a sudden cross sectional widening of its flow border in order to form several stages (13, 14, 15). In this way, a larger median expansion angle (.alpha.) can be chosen without risking detrimental detachment of the main flow than is possible with subsonic diffusers having a continuous flow border. Furthermore, the whirls formed under setoff levels prevent the fiber parts from coming into direct contact with the walls, so that a considerably reduced bead content results in combination with the strong flow expansion and ensuing reduction of mutual contact and penetration of fiber parts. The diameter distribution of the fibers is smoothed out, since speed distribution, which exhibits strong border stress when it emerges from the drawing gap (8), is smoothed out quicker due to the energy consumed by the whirls. By systematically introducing additonal blasting medium in the area of the subsonic diffuser (11), the flow can be systematically influenced in order to meet all the requirements posed for fiber quality.
592900
Hirschmann Clemens
Mellem Joachim
Ungerer Heinz-Jurgen
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Grunzweig + Hartmann Ag
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