EP0225577B1 - Presse pour la fabrication de panneaux de bois - Google Patents

Presse pour la fabrication de panneaux de bois Download PDF

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Publication number
EP0225577B1
EP0225577B1 EP86116673A EP86116673A EP0225577B1 EP 0225577 B1 EP0225577 B1 EP 0225577B1 EP 86116673 A EP86116673 A EP 86116673A EP 86116673 A EP86116673 A EP 86116673A EP 0225577 B1 EP0225577 B1 EP 0225577B1
Authority
EP
European Patent Office
Prior art keywords
press
layer
wood strips
jaws
press plates
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.)
Expired
Application number
EP86116673A
Other languages
German (de)
English (en)
Other versions
EP0225577A1 (fr
Inventor
Peter Schacht
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.)
Individual
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Individual
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6287380&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0225577(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Priority to AT86116673T priority Critical patent/ATE44256T1/de
Publication of EP0225577A1 publication Critical patent/EP0225577A1/fr
Application granted granted Critical
Publication of EP0225577B1 publication Critical patent/EP0225577B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0086—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by connecting using glue
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D3/00—Veneer presses; Press plates; Plywood presses

Definitions

  • the invention relates to a method for producing a solid wood panel according to the preamble of claim 1 and a press for carrying out the method according to the preamble of claim 2.
  • solid wood boards are used instead of grown wooden boards, which can still work well after processing and thus lead to warping, cracking or similar damage, which are formed from several layers, which in turn each consist of relatively narrow wooden slats are formed.
  • the wooden strips are cut in the direction of the fibers so that there is a single direction of fibers in each layer.
  • the fiber directions and thus also the extent of the wooden strips in two adjacent layers are transverse to each other.
  • These layers are pressed together during the gluing in the known method mentioned at the outset, so that a solid wood panel is produced which can be processed like a grown wooden panel, but not, as this tends to the damage mentioned above.
  • the layers are placed in the known press mentioned at the outset between two press plates which can be moved relative to one another and pressed together by these during the gluing.
  • the wooden strips at least of the surface layer that forms one of the visible surfaces of the solid wood panel are made of faultless wood, so that after pressing and thus gluing, the visible surface formed by these wooden strips can in no way be seen that they are not made from a single piece Wooden plate, but is formed from several, glued strips. After the production and processing of such a wooden panel, however, there is a certain shrinkage of such wooden strips across their fibers, which does not lead to the entire solid wooden panel itself showing cracks, warping or no longer being true to size, but nevertheless leads to the fact that Joints between the individual wooden strips are visible on the visible surface, so that the desired impression of a one-piece wooden panel is no longer achieved.
  • the invention is therefore based on the object of developing the method mentioned at the outset in such a way that a solid wood panel is created in which, even after prolonged use under unfavorable climatic conditions, for example in high air dryness, no parting lines between the wooden strips forming the visible surface or visible surfaces become visible .
  • a press is also to be created to carry out this process.
  • two side slides are provided which compress them transversely to the pressing direction of the press plates and to the fiber direction of a surface layer or both surface layers until the wooden strips of the respective surface layer bulge.
  • the press drive for the press plates is designed such that they come to a standstill in a position in which their mutual distance is a little larger than the thickness of the layer layers.
  • the wooden slats that bulge outwards or inwards as a result of the action of the side shifters come into firm contact against the press plates, so that further arching is prevented until these wooden slats break out.
  • the sideshifters assume their end position and remain there for a short time; then the press plates are in turn moved to their end position, in which they flatten the bulges that have arisen, which in turn reach their end position.
  • the press plates remain in this end position for a short time until the gluing is complete. Then the sideshift and press plates move apart so that the solid wood plate thus created can be removed.
  • the sideshift must therefore lie flat against the side edges of the surface layers and cover them fully to prevent the wood from splintering in the area of the sideshift system.
  • the sideshift must therefore preferably be in contact with the press plates.
  • the side slides are each divided into two jaws, each of which is in engagement with one of the surface layers.
  • the intermediate layer (s) are preferably set back from those side edges of the surface layers against which the jaws of the side slides bear in order to avoid disruptive engagement with the jaws.
  • the jaws can each be designed as a continuous bar, the height of which corresponds to that of the surface layers.
  • the two jaws of one side slide each have mutually facing, interlocking guides, which are preferably designed in the form of opposing grooves or webs extending in the direction of movement of the side slide.
  • the contact surface extends over the height of the.
  • Side edges of the surface layers and ensures over the entire length of the side jaws that they cannot move transversely to their direction of movement relative to each other locally, so that damage to the side edges is effectively avoided even when the highest pressures are exerted.
  • the two jaws in the area of their interlocking guides which are arranged at the level of the middle layers of the solid wood panel, provide a stop against it, so that it is possible to produce a solid wood panel with clean, non-stepped side edges.
  • the guides described are sufficient for the relative movement in order to ensure the required mobility of the two jaws of one side slide in each case in the direction of the press pressure of the press plates.
  • the two side jaws are connected to one another in a hinge-like manner, the pivot axis running parallel to the extension of the side jaws.
  • the press plates are normally arranged horizontally, and the lower press plate can be set up as a fixed support for the layer layers.
  • the side slides are lowered together with the upper press plate, whereby the lower jaw of each of the two side slides assumes a swivel position in which it passes the layer layers lying on the lower press plate or the machine table without interference until it sits on the lower press plate or the machine table .
  • a solid wood panel 1 is shown schematically and to scale, which is formed from three plywood layers 2, 3, 4, each of which is formed from mutually parallel wooden strips 5.
  • the wooden strips 5 of the two surface layers 2, 4 run parallel to one another, while the wooden strips 5 of an intermediate layer 3 sandwiched between these layers 2, 4 are arranged perpendicular to the wooden strips 5 of the surface layers 2, 4.
  • the length of the wooden strips of the surface layers 2, 4 is 560 cm
  • the length of the wooden strips 5 of the intermediate layer 3 is a little shorter than 230 cm
  • the thickness of the wooden strips of the surface layers 2, 4 is 4.3 mm in each case
  • the total height of the three layers 2, 3 and 4 is 19 mm.
  • the grain of the wooden strips 5 extends in the longitudinal direction.
  • Fig. 2 the pressing process according to the invention is shown schematically.
  • FIG. 1 The stack shown in FIG. 1 is placed on a lower press plate or a machine table 6.
  • An upper press plate 7, which extends parallel to the lower press plate 6, is lowered into an intermediate layer in which its lower surface lies a distance b above the uppermost surface of the upper surface layer 2.
  • the two surface layers 2, 4 are pressed together in the direction of arrows a by side shifters shown in FIG. 3.
  • the intermediate layer 3 is set back from the side edges of the surface layers 2, 4 which are exposed to the pressing pressure in the direction of the arrows a, so that the intermediate layer remains unaffected by the pressing process.
  • the pressing pressure in direction a is increased until the wooden strips 5 try to avoid the pressing pressure by arching.
  • the bulge can, as shown in the upper surface layer 2, take place towards the free surface, but can also, as shown schematically on the lower surface layer 4, take place towards the intermediate layer 3. It is essential, however, that due to the position of the upper press plate 7, the degree of curvature of the individual wooden strips 5 b / 2 cannot exceed, this dimension being chosen so that no damage to the individual wooden strips 5 can occur due to their curvature.
  • FIG 3 shows a cross section through the press according to the invention.
  • the upper press plate 7 is here in its end position relative to the lower press plate 6.
  • the upper press plate 7 carries on its upper side a press drive 9, shown only schematically, for pressing two side slides 8 in direction a (FIG. 2).
  • the side slides 8 each have a stationary jaw 10 which engages under the upper press plate 7 and which is displaceable along the lower surface of the upper press plate 7 and the height of which must fully cover the edges of the wooden strips 5 of the upper surface layer 2.
  • the downward extension of the upper jaw 10 is arranged, which carries a rigid hinge axis 11 which extends perpendicular to the image plane of FIG. 3 and thus to the direction of movement of both the press plates 6, 7 and the side slider 8.
  • a lower jaw 12 is articulated, which rests with a lower contact surface on the machine table or the lower press plate 6 and has a height which does not fall below the thickness of the wooden strips 5 of the lower surface layer 4.
  • the side slides 8 can also be lowered at least within certain limits independently of the upper press plate 7, so that in the position of FIG. 2 there is also the distance b between the upper jaws 10 and the upper press plate 7.
  • the height of the jaws 10, 12 should be chosen so that its contact surface always covers the entire height of the side edges of the associated surface layer 2, 4.
  • each side shift 8 is able, in full contact with the associated side edge of the upper or lower surface layer 2, 4, both in the operating state of FIG. 2 and in that of FIG. 3 to stay.
  • FIG. 3 the two jaws 10, 12 are shown only schematically with their lowest possible height.
  • FIG. 4 an embodiment of FIG. 4 is preferred, in which two jaws 10 ', 12' are shown in a viewing direction that runs counter to direction a in FIG. 2:
  • the side jaws 10 ', 12' extend with their contact surfaces 3, substantially over the entire height of the free space between the two press plates 6, 7 in their end position, the two jaws 10 ', 12' being provided opposite one another with projections or complementary grooves 13 which engage in one another such that they prevent the relative displacement of the two jaws 10 ', 12' in their longitudinal direction.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Laminated Bodies (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Claims (4)

1. Procédé pour la fabrication d'un panneau de bois massif (1) par compression de plusieurs couches (2, 3, 4) de lattes de bois (5) dans une direction de compression perpendiculaire à ces dernières, dont au moins une couche superficielle forme une surface visible du panneau de bois massif (1), caractérisé en ce que
la couche superficielle (2, 4) est comprimée transversalement à la direction de compression et à la direction des fibres des lattes de bois (5) formant cette couche superficielle (2, 4) jusqu'à ce que les lattes de bois (5) de la couche superficielle (2, 4) soient cintrées,
le cintrage des lattes de bois (5) est limité par une butée (6, 7) pour empêcher leur éclatement, et
les cintrages des lattes de bois (5) sont aplatis avec appui simultané des bords latéraux comprimés de la couche superficielle (2, 4).
2. Presse pour la mise en oeuvre du procédé selon la revendication 1, avec
a) deux plateaux de presse (6, 7) parallèles entre eux et par rapport aux couches de lattes (2, 3, 4), et
b) un mécanisme d'entraînement de compression à l'aide duquel les plateaux de presse (6, 7) peuvent être déplacés entre une position de fin de course pour l'enlèvement du panneau de bois massif (1) et pour la mise en place de nouvelles couches de lattes (2, 3, 4) entre les plateaux de presse (6, 7) et une position de compression pour la compression des couches de lattes (2, 3, 4) et inversement, caractérisée en ce que
c) deux coulisses latérales (8) parallèles entre elles et par rapport aux lattes de bois (5) d'une couche superficielle (2, 4) peuvent être engagées entre les plateaux de presse (6, 7),
d) chaque coulisse latérale (8) est constituée par deux mâchoires (10, 12) parallèles dont chacune peut être appliquée avec une surface de contact contre respectivement un bord latéral d'une couche superficielle (2, 4), la surface de contact présentant au moins la même hauteur que ledit bord latéral,
e) les deux mâchoires (10, 12) de chaque coulisse latérale respective (8) peuvent être déplacées l'une par rapport à l'autre et l'une vers l'autre,
f) un mécanisme d'entraînement transversal est prévu pour amener les coulisses latérales (8) d'une position de fin de course pour l'enlèvement du panneau de bois massif (1) et pour la mise en place de nouvelles couches de lattes (2, 3, 4) dans une position de compression dans laquelle les coulisses latérales (8) compriment les couches superficielles (2, 4) transversalement à la direction des fibres des lattes de bois (5) collées entre elles et à la direction de compression des plateaux de presse (6, 7), avec une force telle que les lattes de bois (5) de ces couches superficielles (2, 4) sont cintrées, et
g) le mécanisme d'entraînement de compression pour les plateaux de presse (6, 7) est agencé pour arrêter ces plateaux de presse (6, 7) dans une position dans laquelle ils limitent le cintrage des lattes de bois (5) des couches superficielles (2, 4) à une quantité non préjudiciable (b).
3. Presse selon la revendication 2, caractérisée en ce que les deux mâchoires (10', 12') de chaque coulisse latérale respective (8) présentent pour leur mouvement relatif des guidages (13) dirigés les uns vers les autres et s'emboîtant les uns dans les autres.
4. Presse selon l'une des revendications 2 ou 3, caractérisée en ce que les deux mâchoires (10, 12 ; 10', 12') de chaque coulisse latérale respective (8) peuvent pivoter l'une vers l'autre autour d'un axe (11) qui leur est parallèle.
EP86116673A 1985-12-02 1986-12-01 Presse pour la fabrication de panneaux de bois Expired EP0225577B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116673T ATE44256T1 (de) 1985-12-02 1986-12-01 Presse zum herstellen einer massivholzplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853542543 DE3542543A1 (de) 1985-12-02 1985-12-02 Presse zum herstellen einer massivholzplatte
DE3542543 1985-12-02

Publications (2)

Publication Number Publication Date
EP0225577A1 EP0225577A1 (fr) 1987-06-16
EP0225577B1 true EP0225577B1 (fr) 1989-06-28

Family

ID=6287380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116673A Expired EP0225577B1 (fr) 1985-12-02 1986-12-01 Presse pour la fabrication de panneaux de bois

Country Status (4)

Country Link
EP (1) EP0225577B1 (fr)
AT (1) ATE44256T1 (fr)
DE (3) DE8533874U1 (fr)
FI (1) FI80842C (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385722B (de) * 1986-06-24 1988-05-10 Pfeifer Friedrich Querpressglied
DE4010307C2 (de) * 1990-03-30 1999-02-25 Dieffenbacher Gmbh Maschf Verfahren zum Herstellen von Massivholzplatten
DE9107070U1 (de) * 1991-06-08 1991-08-29 Schürmann, Franz, 4650 Gelsenkirchen Vorrichtung für die Herstellung von plattenartigen Gegenständen mit einer Oberflächenbeschichtung und einer Plattenrandumleimung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639083A (en) * 1926-11-04 1927-08-16 Central Door And Lumber Compan Panel clamp
DE890568C (de) * 1951-08-28 1953-09-21 Siemens Ag Druckkoerper fuer Verleimungspressen
DE1156963B (de) * 1960-03-23 1963-11-07 Ernst Hungerbuehler Hydraulische Fugenverleimpresse
CA1097193A (fr) * 1976-11-09 1981-03-10 Ewan R. Orr Methode et appareil de fabrication de produits en bois lamelle
CA1164020A (fr) * 1980-12-05 1984-03-20 Richard Braceland Gabarit de montage pour dessus de tables

Also Published As

Publication number Publication date
DE3542543A1 (de) 1987-06-04
FI80842C (fi) 1990-08-10
DE8533874U1 (de) 1986-09-25
ATE44256T1 (de) 1989-07-15
DE3664117D1 (en) 1989-08-03
FI80842B (fi) 1990-04-30
FI864894A0 (fi) 1986-12-01
FI864894A (fi) 1987-06-03
EP0225577A1 (fr) 1987-06-16

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