Roller cutting unit and method for separating fibre material into sections

Patent metadata

Field	Value
Publication number	US-2016368168-A1
Application number	US-201415102007-A
Country	US
Kind code	A1
Filing date	Dec 1, 2014
Priority date	Dec 4, 2013
Publication date	Dec 22, 2016
Grant date	—

Abstract

A method and a device separate a fibrous material into portions, and deposit the portions. The device has a separation roller with cutters which are disposed on the roller circumference of the separation roller, a counter roller, and a portion carrier. The separation roller and the counter roller are rotatable in opposite directions and are disposed such that the fibrous material is guided through between the separation roller and the counter roller and thereby may be severed by one of the cutters interacting with the counter roller. A plurality of integrated retaining elements are configured such that at least one of the retaining elements exerts a retaining force on a portion and are present on the counter roller or on the separation roller, by which the portion is retained on the roller and, after severing, may be moved by a distance conjointly with the roller circumference of this roller.

First claim

1 - 15 . (canceled)

16 . A device for separating fibrous material into portions, and for depositing the portions, the device comprising:
a separation roller having a roller circumference and a plurality of cutters disposed on said roller circumference of said separation roller; a counter roller, said separation roller and said counter roller being rotatable in opposite directions and disposed such that the fibrous material being guided through between said separation roller and said counter roller and thereby may be severed by one of said cutters interacting with said counter roller such that, on account thereof, a portion from the fibrous material is created; a portion carrier; and a plurality of integrated retaining elements being configured such that in each case at least one of said retaining elements may exert a retaining force on the portion and being on one of said counter roller or said separation roller, on account of said plurality of integrated retaining elements, the portion is retained on said separation roller or said counter roller having said retaining elements and, after severing, the portion may be moved by a distance conjointly with said roller circumference of said separation roller or said counter roller, said integrated retaining elements are configured such that the portion after a conjoint movement may be deposited onto said portion carrier in that said integrated retaining elements are embodied so as to be displaceable in a substantially radial manner such that said integrated retaining elements may move the portion away from said roller circumference for depositing.

17 . The device according to claim 16 , wherein said integrated retaining elements are configured as vacuum retaining elements having at least one vacuum connector which is connectible to a vacuum supply which in that circumferential region in which the portion is deposited is deactivatable or interruptible.

18 . The device according to claim 17 , further comprising a stationary vacuum port which is connected to a negative-pressure source and which is configured such that said stationary vacuum port in the circumferential region in which the portion is to be held connects said vacuum connectors of said integrated retaining elements to a vacuum supply, and in the circumferential region in which the portion is deposited vacates said vacuum connectors.

19 . The device according to claim 16 , wherein said integrated retaining elements are embodied as electrostatic retaining elements or as mechanical retaining elements.

20 . The device according to claim 16 , further comprising a gate-type guide, a substantially radial movement of said integrated retaining elements during rotation of said separation roller and said counter roller is controlled by way of said gate-type guide, in such a manner that said gate-type guide in that circumferential region in which the portion is deposited has a substantially radially outward increment.

21 . The device according to claim 16 ,
further comprising a stop edge; and wherein said integrated retaining elements each have at least one sprung element which urges said integrated retaining elements in a substantially radial manner outward up to said stop edge.

22 . The device according to claim 16 , wherein an angle along the roller circumference between that point at which one of said cutters severs the fibrous material up to that point at which the portion is deposited is between 20° and 180°.

23 . The device according to claim 16 , wherein a minimum spacing between one of said integrated retaining elements and said portion carrier when depositing is between 0 and 70 mm.

24 . The device according to claim 16 , wherein said portion carrier is configured as a vacuum conveyor belt disposed such that said vacuum conveyor belt may transport the portions after depositing in a manner substantially transverse to a longitudinal direction of the portions at an angle in relation to the longitudinal direction thereof of 60° to 90°.

25 . The device according to claim 16 , wherein an angle along the roller circumference between that point at which one of said cutters severs the fibrous material up to that point at which the portion is deposited is between 45° and 135°.

26 . The device according to claim 16 , wherein a minimum spacing between one of said integrated retaining elements and said portion carrier when depositing is between 0 and 10 mm.

27 . The device according to claim 16 , wherein said portion carrier is configured as a vacuum conveyor belt disposed such that said vacuum conveyor belt may transport the portions after depositing in a manner substantially transverse to a longitudinal direction of the portions at an angle in relation to the longitudinal direction thereof of 80° to 90°.

28 . A method for separating fibrous material into portions, and for depositing the portions, which comprises the steps of:
a) separating a portion from the fibrous material; b) retaining the portion on a counter roller or on a separation roller, and moving the portion conjointly with a roller circumference of one of the counter roller and the separation roller; and c) depositing the portion on a portion carrier.

29 . The method according to claim 28 , wherein the portion, from that point at which the portion is separated from the fibrous material up to that point at which the portion is deposited, is moved conjointly with the roller circumference across an angle between 20° and 180°.

30 . The method according to claim 28 , which further comprises between steps b) and c) exerting an impulse in an outward radial direction on the portion such that the portion is released from a retaining element.

31 . The method according to claim 28 , which further comprises applying a binder material via a binder application installation onto at least one of a plurality of retaining elements before the retaining elements come into contact with the portion, a retaining force being exerted on account thereof on the portion.

32 . The method according to claim 28 , which further comprises applying a binder material via a binder application installation onto the portions after the portion have been deposited onto the portion carrier, the deposited portions thus being able to be interconnected.

33 . The method according to claim 28 , which further comprises transporting away the portions after the portions have been deposited onto the portion carrier in a manner substantially perpendicular to a fiber direction of the portions, at an angle in relation to the fiber direction thereof of 60° to 90°.

34 . The method according to claim 28 , which further comprises transporting away the portions after the portions have been deposited onto the portion carrier in a manner substantially perpendicular to a fiber direction of the portions, at an angle in relation to the fiber direction thereof of 80° to 90°.

Assignees

• Voith Patent Gmbh

Inventors

• Ufer Jaromir
• Erhardsberger Andreas
• Von Sommoggy Und Erdoedy Maximilian

Classifications

• B65H35/08

  from or with revolving, e.g. cylinder, cutters or perforators · CPC title

• B29B11/16 Primary

  comprising fillers or reinforcement {(non-woven fabrics per se D04H1/00, D04H3/00)} · CPC title

• B65H29/243

  Suction rollers · CPC title

• B65H29/241

  Suction devices · CPC title

• B26D7/018

  Holding the work by suction · CPC title