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WO2005082587A1 - Procede et dispositif de formation d'un mat en matiere fibreuse - Google Patents

Procede et dispositif de formation d'un mat en matiere fibreuse Download PDF

Info

Publication number
WO2005082587A1
WO2005082587A1 PCT/SE2005/000088 SE2005000088W WO2005082587A1 WO 2005082587 A1 WO2005082587 A1 WO 2005082587A1 SE 2005000088 W SE2005000088 W SE 2005000088W WO 2005082587 A1 WO2005082587 A1 WO 2005082587A1
Authority
WO
WIPO (PCT)
Prior art keywords
forming
web
profiles
cross
profile
Prior art date
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.)
Ceased
Application number
PCT/SE2005/000088
Other languages
English (en)
Inventor
Leif Håkan ANDERSSON
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.)
Metso Panelboard AB
Original Assignee
Metso Panelboard AB
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.)
Filing date
Publication date
Application filed by Metso Panelboard AB filed Critical Metso Panelboard AB
Priority to PL05704759T priority Critical patent/PL1718443T3/pl
Priority to EP05704759.9A priority patent/EP1718443B1/fr
Publication of WO2005082587A1 publication Critical patent/WO2005082587A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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

Definitions

  • This invention relates to a method and a device for the continuous forming of a mat for the production of fiberboard, particle board or the like, where fiber or particle material from a batching means is deposited on the surface of a movable forming web.
  • the fiber mat is formed on a movable forming web and thereafter pressed by hot pressing.
  • the mat can be formed in a single homogeneous layer or in several layers with different properties for fibers, size, moisture etc.
  • the forming of a mat usually is made in a passive way, i.e. by distributing the fibers on a movable web or wire and thereafter adjusting the thickness of the mat by removing fibers from the upper surface of the mat.
  • the forming can be made, for example, by transporting the fibers in an air stream from a fiber bin and depositing them on a wire while simultaneously sucking off air through the wire, or by a purely mechanical depositing of the fibers, or by discharge from a batching bin above a plurality of distribution rolls, which distribute the fibers down on a forming web for forming a mat on the web.
  • a usual problem is, that a fiber mat obtained in this way shows distinct unevenesses when studying its cross profile. This can be due a.o. to differences in the type of raw material and to local process conditions, which can be of influence to such a great extent that the cross profile of the formed mat can differ considerably from one installation to another.
  • the fiber mat for example, can show a surplus of material at the outer edges and a deficit of material at the centre, or vice versa. In other cases may be local surpluses or deficits of material somewhere in the width of the mat at an even profile in general.
  • One solution presented for bringing about a more even cross profile is to include in the installation a plurality of forming rolls, which operate on different levels above and to some extent in the fiber mat in order to level the upper surface.
  • a forming method is known where the forming rolls are screw- shaped and their rotation speed and rotation direction can be controlled in order to obtain a controlled movement of material.
  • One problem with these screw-shaped forming rolls is, that they do not work at optimum for levelling the cross profile of thin fiber mats, because there is not so much material to move for achieving the levelling. At high speeds it is also difficult to be able to bring about a sufficient movement before the fiber mat has passed past the forming roll.
  • the present invention has the object to solve the problems of unevenesses in the cross profile of the mat in a simple and forceful way even at high speeds and thin fiber mats.
  • a further object is in a simple way to be able to adjust the level of the bottom of a former.
  • the forming installation By designing the forming installation in such a way, that its bottom can be adjusted vertically locally in cross direction, but substantially in the entire length of the forming web, an installation is obtained where the cross profile simply can be adjusted in the entire length of the former. According to one embodiment, this is achieved in that vertically adjustable longitudinal profiles are mounted below the forming web. By raising or lowering one or several of the longitudinal profiles, a change in the cross profile of the web is obtained. The local raising or lowering in the cross direction becomes equally great in the entire length of the former. The term local adjustment, thus, is to be understood only to be in the cross direction, because the adjustment throughout is in the longitudinal direction.
  • the vertical adjustability is achieved, in that the profiles are placed below the web with support by cross beams, which are provided with recesses for receiving the profiles, and that in each recess a wedge with definite angle is placed. Beneath the longitudinal profiles wedges are attached, which have the same pitch and equal angle as the wedges placed in the recesses of the supporting beams. The angle is chosen with a view to the changing desired, i.e. how abruptly the height is desired to be adjusted.
  • By moving the longitudinal profiles different distances in longitudinal direction it is possible to change the height of the individual profiles by sliding on the respective pair of wedges, and thereby give the bottom of the forming installation a different form. The form of the bottom can then be adjusted so that it compensates for deviations of the cross profile on the formed fiber mat and thereby obtain an even and accurate forming.
  • the adjustment of the cross profile suitably is carried out on the basis of a number of cumulative measurement values in each position in cross direction.
  • position is to be understood as the coordinate of each longitudinal profile in cross direction.
  • the movement of the profiles is carried out by a mechanic means for example a bottlescrew.
  • the conveying belt then must be stopped before a correction can be made.
  • the correction is carried out by an electric adjusting means.
  • electric adjusting means the forming web must not be stopped, but the adjustment of the cross profile can be made in operation.
  • the adjustment of the floor is connected to a continuous cross profile meter in order to make possible a fully automatic adjustment of the cross profile.
  • Fig. 1 shows an installation for the manufacture of fiberboard, where vertically adjustable longitudinal profiles are placed across the width of the forming web beneath the conveying belt.
  • Fig. 2 shows a longitudinal profile according to one embodiment of the invention.
  • Fig. 3 shows an embodiment of the invention, where the raising and, respectively, lowering of the longitudinal profiles is achieved by sliding on a pair of wedges.
  • Fig. 4 shows the position of a wedge pair where a raising of a longitudinal profile relative to the basic position in Fig. 3 is achieved.
  • Figure 1 shows a device according to the invention.
  • a forming roll 1 is provided across the width of the former.
  • On the lower side of the forming web 2 a plurality of longitudinal profiles 3 are placed mutually spaced.
  • the profiles can be arranged, for example, at a distance of approx. 100 mm from each other.
  • the profiles can be raised and lowered independently of each other.
  • FIG. 2 shows an embodiment of the invention.
  • the longitudinal profile 3 is provided with a number of wedges 4 on the lower side of the profile.
  • the wedges are placed at the same distance from each other in the longitudinal direction as the cross supporting beams 6.
  • the supporting beams are provided with recesses, in which wedges 5 with the same pitch and same angle are placed.
  • the wedges 4,5 are placed so that they together give the longitudinal profiles a horizontal position.
  • the recesses are worked so that they form lateral support for the longitudinal profiles.
  • a mechanical adjustment means 7 is mounted between one of the wedges attached to the lower side of the profile and the next cross supporting beam.
  • the mechanical adjustment means can be, for example, a bottlescrew. By adjusting the screw the wedge slides downward or upward along the opposed wedge surface, and the profile is lowered or raised in the entire length of the former.
  • the adjustment means can also be electrical. At one embodiment the adjustment means are connected to a cross profile meter and the adjustment can be carried out automatically on the basis of the measurement result.
  • a stopping means 8 is provided at each end of the single longitudinal profiles. The stopping means is a mechanical stopper in the longitudinal direction and simultaneously prevents the longitudinal profiles from leaving their respective recess.
  • Figure 3 shows in detail a recess 6 and the respective wedge pair 4,5.
  • the wedges placed on the lower side of the profiles 3 preferably are greater than the corresponding wedges 5 placed in the recesses of the longitudinal supporting beams.
  • the size of the wedges is decided by the size of the movement desired to be made in longitudinal direction.
  • the wedges preferably are mounted so that they from their basic position can move an equal distance in both directions in longitudinal direction, so that the achievable maximum elevation is equally great as the maximum lowering.
  • the gear ratio i.e. the size of the movement in longitudinal direction required for achieving a certain raising/lowering, is decided by the choice of the angle of the wedges.
  • FIG. 3 illustrates a wedge pair in basic position
  • Figure 4 shows the location of the wedges and longitudinal profile after a movement. In Figure 4 is shown how a movement in longitudinal direction causes a raising b of the longitudinal profile compared with the basic position in Figure 3.

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)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un procédé et un dispositif destinés à la formation en continu d'un mat en matière fibreuse ou particulaire, cette matière étant déposée sur une bande formable, et le profil transversal du mat sensiblement réglé dans toute la longueur de cette dernière par élévation ou abaissement de la bande de façon locale dans le sens transversal dans une ou plusieurs positions. Le réglage est effectué dans les profils longitudinaux au-dessous de la bande de formage pouvant être élevée ou abaissée de façon indépendante, de sorte que le fond de l'installation de formage puisse prendre différente forme afin de compenser les inégalités dans le profil transversal. L'élévation et, respectivement, l'abaissement peuvent être réalisés dans les coins sur le côté inférieur des profils disposés de manière à coulisser contre les coins placés en retrait sur les faisceaux d'appui situés au-dessous.
PCT/SE2005/000088 2004-02-27 2005-01-27 Procede et dispositif de formation d'un mat en matiere fibreuse Ceased WO2005082587A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL05704759T PL1718443T3 (pl) 2004-02-27 2005-01-27 Urządzenie do formowania maty z materiału włóknistego
EP05704759.9A EP1718443B1 (fr) 2004-02-27 2005-01-27 Dispositif de formation d'un mat en matiere fibreuse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0400484A SE526641C2 (sv) 2004-02-27 2004-02-27 Förfarande och anordning för formning av en matta av fibermaterial
SE0400484-2 2004-02-27

Publications (1)

Publication Number Publication Date
WO2005082587A1 true WO2005082587A1 (fr) 2005-09-09

Family

ID=32067266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/000088 Ceased WO2005082587A1 (fr) 2004-02-27 2005-01-27 Procede et dispositif de formation d'un mat en matiere fibreuse

Country Status (5)

Country Link
EP (1) EP1718443B1 (fr)
CN (1) CN1956826A (fr)
PL (1) PL1718443T3 (fr)
SE (1) SE526641C2 (fr)
WO (1) WO2005082587A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645632A (en) * 1984-04-10 1987-02-24 G. Siempelkamp Gmbh & Co. Belt-type particleboard press with flexible upper platen
US4816092A (en) * 1986-10-13 1989-03-28 Rauma-Repola Oy Procedure and means for regulating the transversal profile of a chip mat formed on a conveyor belt
DE4015583A1 (de) * 1990-05-15 1991-11-21 Siempelkamp Gmbh & Co Anlage zum aufstreuen von holzwerkstoff-streugut auf ein formband
SE517232C2 (sv) 2000-09-21 2002-05-14 Valmet Fibertech Ab Förfarande och anordning för kontinuerlig formning av en fibermatta och en för anordningen avsedd formningsvals
US6409856B1 (en) * 1995-02-02 2002-06-25 Bison-Werke Baehre & Greten Gmbh & Co. Kg Apparatus for smoothing out the surface weight distribution of mats

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4645632A (en) * 1984-04-10 1987-02-24 G. Siempelkamp Gmbh & Co. Belt-type particleboard press with flexible upper platen
US4816092A (en) * 1986-10-13 1989-03-28 Rauma-Repola Oy Procedure and means for regulating the transversal profile of a chip mat formed on a conveyor belt
DE4015583A1 (de) * 1990-05-15 1991-11-21 Siempelkamp Gmbh & Co Anlage zum aufstreuen von holzwerkstoff-streugut auf ein formband
US6409856B1 (en) * 1995-02-02 2002-06-25 Bison-Werke Baehre & Greten Gmbh & Co. Kg Apparatus for smoothing out the surface weight distribution of mats
SE517232C2 (sv) 2000-09-21 2002-05-14 Valmet Fibertech Ab Förfarande och anordning för kontinuerlig formning av en fibermatta och en för anordningen avsedd formningsvals

Also Published As

Publication number Publication date
SE526641C2 (sv) 2005-10-18
SE0400484L (sv) 2005-08-28
CN1956826A (zh) 2007-05-02
EP1718443A1 (fr) 2006-11-08
PL1718443T3 (pl) 2014-04-30
EP1718443B1 (fr) 2013-12-04
SE0400484D0 (sv) 2004-02-27

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