Claims
- 1. A process for continuous production of mineral wool nonwoven fabrics, comprising the steps of:
- discharging a generally vertical stream of mineral wool fibers together with process air into a chute;
- accumulating the fibers on a nonwoven formation zone of a conveyor beneath the chute;
- applying suction with suction means and through the nonwoven formation zone of the conveyor to extract a portion of the process air through the conveyor and adhere the fibers to the conveyor, wherein another portion of the process air is deflected upward from the conveyor; and
- leaving sufficient space between the stream of mineral wool and at least one wall of said chute that the upwardly deflected process air has a velocity no higher than a drop velocity of wool flocks in the upwardly deflected process air.
- 2. The process of claim 1 wherein said velocity is less than 2 meters/sec.
- 3. An apparatus for the continuous production of mineral wool nonwoven fabrics, comprising:
- at least one fiberization unit for discharging a stream of mineral wool fibers;
- a generally vertical chute into which the stream may be discharged together with process air;
- a conveyor beneath the chute and on which the fibers may accumulate; and
- a suction device extracting a portion of the process air through a nonwoven formation zone of the conveyor so as to accumulate and adhere the fibers onto the conveyor, wherein another portion of the process air is deflected upward from the conveyor;
- wherein at least one wall of said chute is sufficiently spaced from the stream of mineral wool that the upwardly deflected process air has a velocity no higher than a drop velocity of wool flocks in the upwardly deflected process air.
- 4. The apparatus of claim 3 wherein said at least one wall is sufficiently spaced that said velocity is less than 2 meters/sec.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4141659 |
Dec 1991 |
DEX |
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Parent Case Info
This is a continuation of application Ser. No. 07/912,171, filed on Jul. 13, 1992 now U.S. Pat. No. 5,296,013.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3787195 |
Kircheim |
Jan 1974 |
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4487622 |
Battigelli et al. |
Dec 1984 |
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Foreign Referenced Citations (4)
Number |
Date |
Country |
0194605 |
Sep 1986 |
EPX |
0547588A1 |
Jun 1993 |
EPX |
2247346 |
May 1975 |
FRX |
3921399 |
Jan 1991 |
DEX |
Continuations (1)
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Number |
Date |
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Parent |
912171 |
Jul 1992 |
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