Vibrating device for an installation for producing a nonwoven, fabric web

Patent metadata

Field	Value
Publication number	US-12344976-B2
Application number	US-202217990393-A
Country	US
Kind code	B2
Filing date	Nov 18, 2022
Priority date	May 18, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A vibration device for an arrangement for producing a nonwoven fabric web, wherein the vibration device is configured to be arranged in a transverse direction of the arrangement under a conveyor belt for fibers from which the nonwoven fabric web is produced, wherein the vibration device is configured to cause the conveyor belt and the fibers transported thereon to vibrate, and wherein the vibration device includes a beam whose top side is configured to contact a bottom side of the conveyor belt at least temporarily, wherein the beam is supported or only excited or excitable by the vibration device so that the beam essentially performs or permits no vibrations in a conveying direction of the arrangement.

First claim

What is claimed is:

1. A vibration device for an arrangement for producing a nonwoven fabric web,
wherein the vibration device is arranged in a transverse direction under a conveyor belt of the arrangement for producing the nonwoven fabric web transporting fibers of the nonwoven fabric web, wherein the transverse direction is transverse to a conveying direction of the conveyor belt,
wherein the vibration device performs vibrations orthogonal to the conveyor belt and causes the conveyor belt and the fibers transported thereon to vibrate,
wherein the vibration device includes a beam whose top side contacts a bottom side of the conveyor belt at least temporarily,
wherein the vibration device is excited or excitable so that the beam essentially performs no vibrations in the transverse and conveying directions of the conveyor belt,
wherein the vibration device includes plural unbalance motors connected with the beam, and
wherein two respective unbalance motors of the plural unbalance motors are arranged in sequence along a longitudinal extension of the beam extending transverse to the conveyor belt and the two unbalance motors are essentially arranged symmetrical to a longitudinal center of the beam.

2. The vibration device according to claim 1 , wherein the plural unbalance motors comprises an even number of the unbalance motors associated with the beam.

3. The vibration device according to claim 2 , wherein two respective unbalance motors of the plural unbalance motors are driven or drivable with essentially identical frequency but with opposite directions of rotation.

4. The vibration device according to claim 1 , wherein the beam extends over an entire width of the conveyor belt.

5. The vibration device according to claim 1 , wherein the beam comprises plural beams arranged in series and extending over an entire width of the conveyor belt in combination.

6. The vibration device according to claim 1 , wherein axes of the two unbalance motors are oriented in a conveying direction of the conveyor belt.

7. The vibration device according to claim 1 ,
wherein the two unbalance motors run In opposite directions, and
wherein the two unbalance motors run at identical speeds,
wherein unbalance weights of the two imbalance motors are arranged so that they reach their lowest points and their highest points concurrently so that vibration excitations in the longitudinal direction of the beam cancel each other out.

8. An arrangement for producing a nonwoven fabric web made from fibers made from synthetically produced polymers or industrially produced inorganic fibers, the industrially produced fibers selected from the group consisting of glass, metal, mineral, ceramic, or carbon fibers, the arrangement comprising:
the vibration device and conveyor belt according to claim 1 , the conveyor belt transporting the fibers of the nonwoven fabric web.

9. The arrangement according to claim 8 , further comprising: a device connecting the fibers and arranged downstream of the vibration device.

10. The arrangement according to claim 8 , further comprising a forming device configured to lay the fibers onto the conveyor belt wet.

11. A method for producing a non-woven fiber web made from fibers made from synthetically produced polymers or industrially produced inorganic fibers, the industrially produced fibers selected from the group consisting of glass, metal, mineral, ceramic or carbon fibers, using the arrangement according to claim 8 , wherein the fibers are at least partially realigned with respect to their position or orientation on the conveyor belt by the vibration device.

12. The method according to claim 11 , wherein the beam is caused to vibrate by the vibration device essentially only in one direction orthogonal to a bottom side of the conveyor belt.

13. The method according to claim 12 , wherein the vibration device comprises two unbalance motors connected with the beam and driven at essentially identical frequencies but with opposite directions of rotation.

14. The method according to claim 11 , further comprising: after said at least partially realigning the fibers, connecting the fibers with one another by heating a bonding agent so that the bonding agent cures to connect the fibers with one another.

15. The method according to claim 11 , further comprising: adjusting a vibration excitation of the beam with respect to amplitude and frequency by adjusting the speed of the plural unbalance motors or by a position adjustment of unbalance weights connected to the plural unbalance motors.

Assignees

• Voith Patent Gmbh

Inventors

• Boegershausen Andreas
• Poos Alexander

Classifications

• B65G27/20

  rotating unbalanced masses · CPC title

• B65G27/32

  with means for controlling direction, frequency or amplitude of vibration or shaking movement · CPC title

• B29C67/20

  for porous or cellular articles, e.g. of foam plastics, coarse-pored {(chemical aspects of working up macro-molecular substances to porous or cellular articles C08J9/00)} · CPC title

• B29C35/02

  Heating or curing, e.g. crosslinking or vulcanizing {during moulding, e.g. in a mould}(cold vulcanisation B29C35/18 {; vulcanising tyres, presses therefor B29D30/0601}) · CPC title

• D10B2101/20

  Metallic fibres · CPC title