EP0029256A2 - Procédé pour la fabrication de segments de planche à partir de bois rond - Google Patents

Procédé pour la fabrication de segments de planche à partir de bois rond Download PDF

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Publication number
EP0029256A2
EP0029256A2 EP80107356A EP80107356A EP0029256A2 EP 0029256 A2 EP0029256 A2 EP 0029256A2 EP 80107356 A EP80107356 A EP 80107356A EP 80107356 A EP80107356 A EP 80107356A EP 0029256 A2 EP0029256 A2 EP 0029256A2
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EP
European Patent Office
Prior art keywords
wood
board
boards
diameter
round
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.)
Withdrawn
Application number
EP80107356A
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German (de)
English (en)
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EP0029256A3 (fr
Inventor
Kurt Feyler
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Individual
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Individual
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Publication date
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Publication of EP0029256A2 publication Critical patent/EP0029256A2/fr
Publication of EP0029256A3 publication Critical patent/EP0029256A3/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • 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
    • B27M3/0026—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally
    • B27M3/0053—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by oblong elements connected laterally using glue

Definitions

  • the invention relates to a method for the production of board lamellas from round wood, preferably for use in wood glue construction, e.g. for the production of glued wooden profile girders, in which logs cut to the same length, preferably those of smaller diameter, are sawn and trimmed after sorting to predetermined pigtail diameters according to a predetermined cross-section, the trimming being carried out at least partially to utilize the tree curve with complementary profiles running obliquely to the board level, that are glued together to form boards or boards and can later be cut to the width of board lamellas.
  • Such methods aim to make the round or oval cross-section of the grown trunk as useful as possible. Due to the rounding of the tree, processing into boards or lamellas with a rectangular cross-section results in a drop in the area of this rounding, which increases in percentage, the smaller the diameter of the round timber used. This problem became, as with for example, teaches GB-PS 11 828 from 1904, recognized early. In order to make better use of the available cross-section, it is proposed here to trim along the edges caused by the saw cuts, ie the cut edges with the rounding of the tree, and then to glue the boards cut in this way in opposite directions to form panels. From this it is also known to profile the gluing surfaces or to provide them with grooves in order to allow the pressing pressures to act more favorably.
  • wood losses result from the fact that the board lamellae are produced from non-dried wood, because width tolerances occur as a result of the subsequent drying, which lead to great planing loss in the size of the glue-laminated binder during later gluing and make it difficult to align the lamellae laterally.
  • the invention has for its object to provide a process for the manufacture of board lamellae, which can be carried out with optimal utilization of the trunk cross-section, in particular of weak logs by means of automated processes in a time-saving and energy-saving manner and leads to inexpensive products.
  • the object is achieved in that the sorted logs are sawed, dried and immediately after debarking according to a predetermined cross-sectional diameter that is different for each diameter, two longitudinal board edges to be connected, which are provided with tree rounding, are profiled and glued within their overlap section, the complementary profiling being carried out in accordance with preselected factors or factors determined by measurement and / or calculation in accordance with an optimal profiling image for the relevant factors.
  • the sorting is carried out according to the invention in stepwise diameter intervals, ie in each case a diameter range that can be offset in centimeters with smaller diameters, optimal sectional images are determined mathematically or planemetrically, which are then used in further processing and trimming.
  • stepwise diameter intervals ie in each case a diameter range that can be offset in centimeters with smaller diameters
  • optimal sectional images are determined mathematically or planemetrically, which are then used in further processing and trimming.
  • Several cross-sectional images that are equivalent in terms of their wood cross-sectional utilization can be assigned to a diameter, and the decision about which one is used can depend on other factors pending.
  • the method according to the invention which contains a systematic structure, makes it possible to fully automate the processing from the beginning to the end, the entire process sequence being able to be carried out by a suitably programmed computer to which the desired factors (for example with regard to further processing) are individually input detectors can be provided (depending on the cross-sectional dimensioning of the unedged board), the profiling in turn by entering the intended use or other factors into the computer can be determined.
  • Figures 1 to 15 show cross-sectional views of logs that have been cut into lengths of approximately 2.70 m and then sorted according to their braid diameter, which is denoted by d in the individual figures. Since the logs have been deflected into relatively short pieces, the taper plays only a minor role in terms of waste. The selection of the cutting pattern is made taking into account the smallest diameter. However, since the invention is not limited to the use of these short round timber sections and can also be used for longer woods, especially if they show straight growth, the invention should also reserve the right to take into account the taper in the longitudinal direction of the fiber in that in itself in a known manner, two conical board sections are glued together with reverse conicity. For the following considerations it is irrelevant whether the logs are trimmed with parallel flanks or conical, because in the case of conical trimming, the required tapering in the longitudinal direction of the fibers only has to be taken into account during processing, as is known per se.
  • the diameter details are given as approximate dimensions of the debarked logs. Because, of course, a different sectional image should not be used for each diameter dimension, but rather an optimization to as few sectional images as possible should be carried out, whereby it has been shown that jumps in diameter of 10 mm are quite sufficient with regard to a specific sectional image.
  • the sorting is carried out in such a way that, for example, all logs with a spigot diameter of greater than 100mm, but smaller than 110mm etc., are each fed to a stack and then subjected to an identical cutting pattern processing, whereby of course other diameter limits can also be used for the sorting .
  • the dimensions and steps indicated in the drawing are therefore not restrictive and should only be considered as examples.
  • the parallel cuts which run vertically in the drawing, are carried out on all sectional images by means of appropriately set saws.
  • the trimming is carried out, as a result of which rectangular lamellae in cross-section are formed by parallel-flanking where the low height of the remaining circular arc section makes it economically unreasonable to use this section.
  • these lamellae are identified by reference number 30.
  • an economic efficiency calculation teaches that in general an oblique trimming of at least the outer boards is advantageous for the degree of utilization of the wood in these circular sections.
  • those longitudinal edges which are subjected to oblique trimming, in particular according to FIGS. 16 to 26, are identified by a double line. If one assumes that the panels produced by gluing the obliquely trimmed longitudinal edges should have a smooth, uninterrupted upper or lower side, maximum wood utilization results when a straight trimming cut is carried out, so that the trimmed waste resulting from the trimming is a circular section in cross section forms. For applications where mutually parallel depressions in the wooden plate can be accepted, somewhat better utilization can be achieved if the trimming cut only trims part of the remaining circular section.
  • gluing is only technically and economically possible and sensible if the angle of incidence of the cut edges in relation to the board level does not fall below a predetermined angle. From an angle of approximately 35 °, complementary profiling of the trimmed longitudinal edges is generally necessary or expedient and, as mentioned above, is one for this purpose made profiling known per se. The profiling not only prevents the boards to be glued from shifting to the side, but also increases the glue area.
  • lamella 30 and boards 34 with complementary trimming can be glued to one another, provided that these have the same board thickness and the same angle relative to the board plane determined by the chord of the trimming circle section.
  • FIGS. 5 and 7 to 15 Such different sectional images are shown in FIGS. 5 and 7 to 15 each lying horizontally next to one another.
  • the selection of the sectional image will generally depend on whether the rectangular or obliquely trimmed strips produced in the case of various sectional images in the edge area are required or can be processed economically or not. Based on a requirement calculation, the most favorable sectional image can be found, in particular in connection with a computer.
  • a suitably programmed computer can also be used to calculate which cut patterns or which combinations of cut patterns are most appropriate, taking into account the need, in the presence of a specific log stock.
  • the dashed circular arc sections 46 and 48 characterize the tree curve of the board in question, which, as can be seen, run through points 42 and 44, respectively.
  • the board 36 is the tree rounding assigned to the circular arc section 46 and to the board 38 the tree rounding of the circular arc section 48.
  • a profiling line 50 is drawn in between these circular arc sections 46 and 48, which marks the trimming of the two boards 36 and 38 in order to give them a complementary cross section. Accordingly, the area between the profiling line 50 and the circular arc section 46 is milled out from the edge of the board 36 and the area between the profiling line 50 and the circular arc section 48 from the edge of the board 38.
  • the chord 40 lies in the middle between the circular arc sections 46, 48 with the same radius of curvature, so that the latter result in a lens cross section which is symmetrical with respect to the chord 40.
  • all of the circular arc sections 46, 48 have an identical radius, but of course this only applies to a specific braid diameter.
  • the angle of the chord 40 relative to the board plane also changes, of course, depending on the sectional image and braid diameter, as is shown by a consideration of FIGS. 1 to 15.
  • the boards lying symmetrically to one another in the sectional view are glued to one another, which are obtained from a supply of a specific braid diameter were.
  • the stair-like profiling shown in FIGS. 16 to 18 with different profiling options has proven to be particularly advantageous for many applications in that glue joints are formed here, which on the one hand run parallel to the board level and, on the other hand, perpendicular to it, which can be advantageous with regard to the gluing, because the glue joints are acted upon by defined longitudinal or transverse pressure. On the other hand, there are favorable strength properties for certain applications.
  • FIGS. 19 to 26 Further expedient refinements of the profile connections result from FIGS. 19 to 26.
  • wedge galvanizing can be carried out or a tongue and groove connection according to FIGS. 23, 25 and 26, or intermediate shapes according to FIGS. 20 to 22 can be selected, the choice of shape depends on the angle of attack of the tendon and other factors that can determine the preference for one or the other profile for the respective connection.
  • Board lamellae are cut from the panels glued according to FIGS. 16 to 26, which can then be glued with their broad sides, so that cross-sectionally rectangular supports or also supports with a different profile, for example double-T supports, can be produced.
  • the gluing is carried out by hot gluing or in particular by high-frequency gluing, by which the latter ensures that essentially only the glue joint provided with the moist glue is exposed to heating, which results in considerable energy savings and improvements tion of the gluing compared to hot gluing in a heating chamber results, as is known per se.
  • the waste resulting from the trimming is small and limited to a maximum to the circular section at the trimming edge. In this way, it is accordingly possible to economically utilize even leaner round timber, the small remaining waste which results from the sectional images according to FIGS. 1 to 15 being able to be fed to the cellulose industry as waste.
  • the invention can be used with particular advantage in the case of logs of smaller diameter, it can of course also be used sensibly with logs of larger diameter, in which case the use of larger log lengths and the consideration of the taper in the log longitudinal direction by joining converging and diverging boards can be expedient.
  • the supports for example Hetzer supports
  • the supports are produced from the glued boards in such a way that board lamellae of the same width (or for the production of certain cross-sectional profiles of unequal width) are first cut and then glued to one another.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
EP80107356A 1979-11-26 1980-11-25 Procédé pour la fabrication de segments de planche à partir de bois rond Withdrawn EP0029256A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792947611 DE2947611C2 (de) 1979-11-26 1979-11-26 Verfahren zur Herstellung von Brettlamellen
DE2947611 1979-11-26

Publications (2)

Publication Number Publication Date
EP0029256A2 true EP0029256A2 (fr) 1981-05-27
EP0029256A3 EP0029256A3 (fr) 1982-01-13

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EP80107356A Withdrawn EP0029256A3 (fr) 1979-11-26 1980-11-25 Procédé pour la fabrication de segments de planche à partir de bois rond

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EP (1) EP0029256A3 (fr)
DE (1) DE2947611C2 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512729A1 (fr) * 1981-09-15 1983-03-18 Chambon Alain Systemes constructifs a base de poutres en bois massif reconstitue
WO1983003791A1 (fr) * 1982-05-04 1983-11-10 Peter Polaczek Procede et dispositif pour transformer des billes de bois en bois de construction
WO1998030370A1 (fr) * 1997-01-09 1998-07-16 Cfl Structure Inc. Procede de fabrication d'une planche en bois et la planche en soi
WO1998038019A1 (fr) * 1997-02-24 1998-09-03 Synergy Wood Processing Inc. Articles en bois transforme, produits composites en bois fabriques a partir de ces articles et procede de fabrication
WO1998041370A1 (fr) * 1997-03-19 1998-09-24 Ab Älvsbyhus Procede pour fabriquer des objets allonges en bois
US5888620A (en) * 1997-01-09 1999-03-30 Cooperative Forestiere Laterriere Process for making a wood board and the wood board
WO2002068164A1 (fr) * 2001-02-27 2002-09-06 Canadian Forest Products Ltd. Produit en bois composite et procede de fabrication
US6701984B2 (en) 1999-12-15 2004-03-09 9069-0470 Quebec Inc. Wood board made of a plurality of wood pieces, method of manufacture and apparatus
EP2842707A1 (fr) * 2013-08-26 2015-03-04 Ladenburger GmbH Poutre en bois lamellé collé et son procédé de fabrication
WO2015086332A1 (fr) * 2013-12-10 2015-06-18 Hans-Peter Leitinger Panneau de bois de sciage constitué de planches latérales et procédé de production de ceux-ci
AT522641A1 (de) * 2019-02-07 2020-12-15 Leitinger Hans Peter Bretterpaar, Holzverbundplatte und Verfahren zu deren Herstellung
WO2022028654A1 (fr) * 2020-08-03 2022-02-10 Xaver Haas Procédé de fabrication de bois de construction à partir de menu bois et de bois de construction

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9103009L (sv) * 1991-10-16 1993-04-17 Lars Hammarstroem Foerfarande foer reducering av en stock
FI2181U1 (fi) * 1995-09-21 1995-11-17 Risto Heikki Pitkaenen Aemne foer framstaellning av en lim- och limbalksskiva
SE9800105L (sv) * 1998-01-16 1999-07-17 Green Gluing Scandinavia Ab Metod för att framställa delenheter till slutprodukter av olika slag av virke
FI105790B (sv) * 1999-01-28 2000-10-13 Johan Tore Karlstroem Förfarande för tillverkning av reglar och regelsystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2159337A1 (de) * 1971-11-30 1973-06-07 Albert Rufle Verfahren und vorrichtung zur herstellung von schnittholz
US3811487A (en) * 1971-10-19 1974-05-21 L Warren Automatic sawmill
DE2606116A1 (de) * 1975-02-18 1976-09-02 Lehner & Putz Bau Aktiengesell Verfahren zur herstellung von schnittholzelementen
DE2708518A1 (de) * 1977-02-26 1978-08-31 Otto Kreibaum Verfahren und anlage zum gewinnen von schnittholz aus rundholz

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2720762C3 (de) * 1977-05-09 1982-09-16 Otto Ing.(Grad.) 3216 Salzhemmendorf Kreibaum Verfahren zum Verarbeiten von Rundholz zu zusammengesetzten Platten
IT1116595B (it) * 1979-06-05 1986-02-10 Franciosi Giovanni Metodo e dispositivo per la segazione di tronchi dotati di naturale conicita'per ottenere il massimo rendimento in travi parallelepipede a sezione rettangolare con tolleranze d'uso

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811487A (en) * 1971-10-19 1974-05-21 L Warren Automatic sawmill
DE2159337A1 (de) * 1971-11-30 1973-06-07 Albert Rufle Verfahren und vorrichtung zur herstellung von schnittholz
DE2606116A1 (de) * 1975-02-18 1976-09-02 Lehner & Putz Bau Aktiengesell Verfahren zur herstellung von schnittholzelementen
DE2708518A1 (de) * 1977-02-26 1978-08-31 Otto Kreibaum Verfahren und anlage zum gewinnen von schnittholz aus rundholz

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512729A1 (fr) * 1981-09-15 1983-03-18 Chambon Alain Systemes constructifs a base de poutres en bois massif reconstitue
WO1983003791A1 (fr) * 1982-05-04 1983-11-10 Peter Polaczek Procede et dispositif pour transformer des billes de bois en bois de construction
WO1998030370A1 (fr) * 1997-01-09 1998-07-16 Cfl Structure Inc. Procede de fabrication d'une planche en bois et la planche en soi
US5888620A (en) * 1997-01-09 1999-03-30 Cooperative Forestiere Laterriere Process for making a wood board and the wood board
US6025053A (en) * 1997-01-09 2000-02-15 Cfl Structure Inc. Process for making a wood board and the wood board
CN1098758C (zh) * 1997-02-24 2003-01-15 协作木材加工公司 锯制木构件,由此制成的复合木制产品以及加工方法
WO1998038019A1 (fr) * 1997-02-24 1998-09-03 Synergy Wood Processing Inc. Articles en bois transforme, produits composites en bois fabriques a partir de ces articles et procede de fabrication
US5870876A (en) * 1997-02-24 1999-02-16 Synergy Wood Processing Inc. Converted wood articles, composite wood products made therefrom and method of making same
AU727987B2 (en) * 1997-02-24 2001-01-04 Synergy Wood Processing Inc. Converted wood articles, composite wood products made therefrom and method of making same
AU727987C (en) * 1997-02-24 2001-11-01 Synergy Wood Processing Inc. Converted wood articles, composite wood products made therefrom and method of making same
WO1998041370A1 (fr) * 1997-03-19 1998-09-24 Ab Älvsbyhus Procede pour fabriquer des objets allonges en bois
US6701984B2 (en) 1999-12-15 2004-03-09 9069-0470 Quebec Inc. Wood board made of a plurality of wood pieces, method of manufacture and apparatus
WO2002068164A1 (fr) * 2001-02-27 2002-09-06 Canadian Forest Products Ltd. Produit en bois composite et procede de fabrication
EP2842707A1 (fr) * 2013-08-26 2015-03-04 Ladenburger GmbH Poutre en bois lamellé collé et son procédé de fabrication
WO2015086332A1 (fr) * 2013-12-10 2015-06-18 Hans-Peter Leitinger Panneau de bois de sciage constitué de planches latérales et procédé de production de ceux-ci
AT522641A1 (de) * 2019-02-07 2020-12-15 Leitinger Hans Peter Bretterpaar, Holzverbundplatte und Verfahren zu deren Herstellung
WO2022028654A1 (fr) * 2020-08-03 2022-02-10 Xaver Haas Procédé de fabrication de bois de construction à partir de menu bois et de bois de construction

Also Published As

Publication number Publication date
DE2947611A1 (de) 1981-05-27
EP0029256A3 (fr) 1982-01-13
DE2947611C2 (de) 1984-01-19

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