EP0336098A2 - Appareil pour uniformiser la répartition de poids par unité de surface de nappes - Google Patents

Appareil pour uniformiser la répartition de poids par unité de surface de nappes Download PDF

Info

Publication number: EP0336098A2
Authority: EP; European Patent Office
Prior art keywords: fleece; unit; back brush; spreader roller; layer
Prior art date: 1988-04-07
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Granted

Application number

EP89103202A

Other languages

German (de)

English (en)

Other versions

EP0336098B1 (fr

EP0336098A3 (fr

Inventor

Reinhard Kessing

Friedrich Dipl.-Holzwirt Schröder

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Bison Werke Baehre and Greten GmbH and Co KG

Original Assignee

Bison Werke Baehre and Greten GmbH and Co KG

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1988-04-07

Filing date

1989-02-23

Publication date

1989-10-11

1989-02-23 Application filed by Bison Werke Baehre and Greten GmbH and Co KG filed Critical Bison Werke Baehre and Greten GmbH and Co KG

1989-10-11 Publication of EP0336098A2 publication Critical patent/EP0336098A2/fr

1991-03-27 Publication of EP0336098A3 publication Critical patent/EP0336098A3/fr

1993-06-02 Application granted granted Critical

1993-06-02 Publication of EP0336098B1 publication Critical patent/EP0336098B1/fr

2009-02-23 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
- B27N3/146—Controlling mat weight distribution

Definitions

the invention relates to a device for equalizing the basis weight distribution of single or multi-layer nonwovens for the production of plate-shaped products in the form of wood chip, wood fiber or the like plates.
leveling devices in the form of brushes or rakes in connection with feedback units, which accumulate in front of the brush or rake unit in the form of an accumulation of fleece particles in the form of pre-fleece as well as in the case of fleeces already on the fleece carrier transport the dosing hopper back.
the object of the invention is to design a device of the type specified at the outset in such a way that, in the case of single-layer as well as multi-layer nonwovens, a particularly good uniformization of the basis weight distribution over the width of the nonwoven is achieved without the need for material recycling and, at the same time, the best possible equalization of the respective Fleece surface is ensured.
This object is essentially achieved according to the invention in that at least one back brush unit which extends over the fleece width is assigned to the fleece carrier which is fed via at least one scattering head, and this back brush unit is connected upstream of this back brush unit in the fleece direction of the fleece in order to vary the deflection of the fleece particles which hit it is.
a back-brushing unit with a throw-scattering effect and a distribution unit which distributes the impacting, in particular larger, fleece particles evenly across the width of the fleece, not only achieves a leveling effect and a basis weight equalization, but at the same time, a certain amount of the fleece is achieved by the back-brushing unit Pressure effect exerted, which ensures that any spikiness of the respective fleece layer is eliminated and a correspondingly flat fleece surface is created.
the back brush unit acts on a nonwoven middle layer, since in this case it is possible to achieve a smooth and even middle layer that is as suitable as possible for receiving the respective top layer, which guarantees that none after a pressing process there are areas of varying thickness between the middle layer and the top layer and there is therefore no risk of grinding through during a later top layer grinding process.
the device according to the invention also ensures that any valleys present in the nonwoven are filled up and chips are mixed homogeneously in a random position over the entire width of the nonwoven, which in the case of the plates produced from such a nonwoven has the advantage that such plates are practical have no tendency to default.
the back brush unit expediently consists of a back brush spreader roller which extends over the width of the web, the axis of rotation of which runs parallel to the web carrier and perpendicular to the direction of travel of the web carrier and which is preferably driven at high speed, with a suitable speed being, for example, 300 revolutions per minute.
the back brush spreader roller which performs the function of a throwing roller, is expediently adjustable in its distance from the fleece carrier, so that simple adaptation to the conditions of the respective fleece formation is possible.
the distribution unit consists of a plurality of pendulum flaps arranged side by side, the axes of which preferably run perpendicular to the fleece carrier and which are coupled in phase or at least partly out of phase with a common drive.
pendulum flaps ensure that those fleece particles that are not flattened and compressed by the back brush spreader roller, but are thrown back in the direction of the pendulum flaps, are deflected and distributed in such a way that these particles are irregular over the fleece width while avoiding peaks and valleys be distributed.
the delivery quantity of the spreading head upstream of the rear brush unit is regulated as a function of the current consumption of the rear brush unit, which makes it possible to keep the volume of the hill forming in front of the rear brush unit approximately constant.
This fleece 2 has an irregular surface contour with mountains and valleys in the area in front of a back brush unit 3.
the back brush unit 3 which consists of a back brush spreader roller with a working width corresponding at least to the fleece width, is set in its distance from the fleece carrier 1 so that a compensation of the surface unevenness of the fleece coming into its area of action is possible.
the height of the back brush spreader roller which is preferably assigned to the middle layer when the fleece is built up, can be adjusted by a motor drive and thus adapted to the special circumstances of a type of fleece. It is driven comparatively high speed. A typical number of revolutions is about 300 revolutions per minute.
This back-brush spreader roller exerts a certain pressure on the fleece, so that barbed protruding chips are flipped over and an equalized, flat surface is obtained.
Fig. 2 shows the distribution unit 4 in a front view and reveals that the distribution unit 4 consists of several side-by-side swing flaps 5, the axes 6 of which are perpendicular to the fleece carrier 1.
swing flaps 5 are driven by a common drive 8 in phase or at least partially out of phase, i.e. set in pivoting movements.
the distance between the lower edge of the pendulum flaps 5 and the fleece 2 is chosen to be as small as possible, but it is always ensured that the pendulum flaps do not dip into the fleece 2, which still has an irregular surface contour.
the distance between the rear brush unit 3 and the distribution unit 4 can always be selected depending on the type of fleece and the selected rotational speed of the rear brush unit in such a way that the best possible distribution of the discarded particles results. This can be determined by experiment the.
the delivery quantity of the scattering head upstream of the backburner unit is preferably regulated as a function of this amount of fleece particles which accumulates in front of the backbrushing unit, which can expediently be implemented in such a way that the Current consumption of the back brush unit is determined and used as a control variable for the dispensing quantity.

Landscapes

Life Sciences & Earth Sciences (AREA)
Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Wood Science & Technology (AREA)
Forests & Forestry (AREA)
Dry Formation Of Fiberboard And The Like (AREA)
Preliminary Treatment Of Fibers (AREA)

EP89103202A 1988-04-07 1989-02-23 Appareil pour uniformiser la répartition de poids par unité de surface de nappes Expired - Lifetime EP0336098B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE3811677A DE3811677A1 (de)	1988-04-07	1988-04-07	Vorrichtung zur vergleichmaessigung der flaechengewichtsverteilung von vliesen
DE3811677		1988-04-07

Publications (3)

Publication Number	Publication Date
EP0336098A2 true EP0336098A2 (fr)	1989-10-11
EP0336098A3 EP0336098A3 (fr)	1991-03-27
EP0336098B1 EP0336098B1 (fr)	1993-06-02

Family

ID=6351557

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP89103202A Expired - Lifetime EP0336098B1 (fr)	1988-04-07	1989-02-23	Appareil pour uniformiser la répartition de poids par unité de surface de nappes

Country Status (4)

Country	Link
US (1)	US4998869A (fr)
EP (1)	EP0336098B1 (fr)
DE (2)	DE3811677A1 (fr)
ES (1)	ES2040913T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19503407A1 (de) *	1995-02-02	1996-08-08	Baehre & Greten	Vorrichtung zur Vergleichmäßigung der Flächengewichtsverteilung von Vliesen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2250632B (en) *	1990-10-18	1994-11-23	Unisearch Ltd	Tandem mass spectrometry systems based on time-of-flight analyser
SE503676C2 (sv) *	1994-11-28	1996-07-29	Flaekt Ab	Anordning för avjämning av en av partiklar bestående materialbana
DE10064541A1 (de) *	2000-12-22	2003-04-30	Dieffenbacher Schenck Panel	Egalisierungswalze
DE102006030122B4 (de) *	2006-06-28	2008-05-21	Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg	Streugutanlage
EP2695982A1 (fr) *	2012-08-06	2014-02-12	Oskar Dilo Maschinenfabrik KG	Dispositif et méthode pour égaliser ou obtenir un profil donné à un matelas de flocons de fibres

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA676710A (en) *		1963-12-24	D. Moore Lorenzo	Felted fibrous mat and apparatus for preparing same
US2241051A (en) *	1935-12-16	1941-05-06	Armstrong Cork Co	Apparatus for manufacturing molded inlaid linoleum
US2441169A (en) *	1943-06-19	1948-05-11	Roman Charles	Machine for forming artificial board
US2689975A (en) *	1948-06-25	1954-09-28	Leng Franz Maria	Apparatus and method for producing building boards
US2635301A (en) *	1948-09-30	1953-04-21	Plywood Res Foundation	Web or mat forming device
US2822024A (en) *	1956-01-16	1958-02-04	Allwood Inc	Apparatus for manufacturing wood particle boards
SU151689A1 (ru) *	1961-02-10	1961-11-30	н С.С. Амираг	Машина дл загрузки сыпучих и кусковых материалов в металлургическую печь
US3202743A (en) *	1961-09-06	1965-08-24	Elmendorf Armin	Method of forming a composite panel
DE1453410C3 (de) *	1962-06-26	1978-04-13	Carl Schenck Ag, 6100 Darmstadt	Verfahren und Vorrichtung zur Herstellung von Spänevliesen für die anschließende Verpressung zu Spanplatten oder ähnlichem Gut
DE1224920B (de) *	1965-04-10	1966-09-15	Wuertex Maschb G M B H	Maschine zum Herstellen von Holzspan-vliesen od. dgl.

1988
- 1988-04-07 DE DE3811677A patent/DE3811677A1/de not_active Withdrawn
1989
- 1989-02-23 EP EP89103202A patent/EP0336098B1/fr not_active Expired - Lifetime
- 1989-02-23 DE DE8989103202T patent/DE58904543D1/de not_active Expired - Fee Related
- 1989-02-23 ES ES198989103202T patent/ES2040913T3/es not_active Expired - Lifetime
- 1989-04-06 US US07/334,663 patent/US4998869A/en not_active Expired - Lifetime

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19503407A1 (de) *	1995-02-02	1996-08-08	Baehre & Greten	Vorrichtung zur Vergleichmäßigung der Flächengewichtsverteilung von Vliesen
DE19503407C2 (de) *	1995-02-02	1999-07-01	Kvaerner Panel Sys Gmbh	Vorrichtung zur Vergleichmäßigung der Flächengewichtsverteilung von Vliesen

Also Published As

Publication number	Publication date
US4998869A (en)	1991-03-12
ES2040913T3 (es)	1993-11-01
EP0336098B1 (fr)	1993-06-02
DE3811677A1 (de)	1989-10-19
EP0336098A3 (fr)	1991-03-27
DE58904543D1 (de)	1993-07-08

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1989-08-26	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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