EP3744492A1 - Herstellungsverfahren von mehrschicht-massivholzplatten - Google Patents

Herstellungsverfahren von mehrschicht-massivholzplatten Download PDF

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Publication number
EP3744492A1
EP3744492A1 EP20176871.0A EP20176871A EP3744492A1 EP 3744492 A1 EP3744492 A1 EP 3744492A1 EP 20176871 A EP20176871 A EP 20176871A EP 3744492 A1 EP3744492 A1 EP 3744492A1
Authority
EP
European Patent Office
Prior art keywords
solid wood
veneers
logs
wood
panels
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.)
Granted
Application number
EP20176871.0A
Other languages
English (en)
French (fr)
Other versions
EP3744492B1 (de
Inventor
Jérôme LESCURE
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.)
Neofor SAS
Original Assignee
Neofor SAS
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 Neofor SAS filed Critical Neofor SAS
Priority to RS20220203A priority Critical patent/RS62962B1/sr
Priority to SI202030034T priority patent/SI3744492T1/sl
Priority to PL20176871T priority patent/PL3744492T3/pl
Priority to HRP20220322TT priority patent/HRP20220322T1/hr
Publication of EP3744492A1 publication Critical patent/EP3744492A1/de
Application granted granted Critical
Publication of EP3744492B1 publication Critical patent/EP3744492B1/de
Active legal-status Critical Current
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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
    • B27B1/002—Methods for subdividing trunks or logs essentially involving sawing by cross-cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27D—WORKING VENEER OR PLYWOOD
    • B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
    • B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
    • 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
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/08—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by multi-step processes
    • 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
    • B27N7/00—After-treatment, e.g. reducing swelling or shrinkage, surfacing; Protecting the edges of boards against access of humidity
    • B27N7/005—Coating boards, e.g. with a finishing or decorating layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor

Definitions

  • the present invention relates to the field of the production of wood panels intended in particular for wood processing industries, carpentry for example, with a view to manufacturing objects such as furniture or other fitting or decoration products. decoration. In its greater thicknesses, the product obtained can form a structural building element.
  • An object of the invention is to allow the production of solid wood panels in a wide range of thicknesses.
  • a plywood panel is a wood-based panel obtained by bonding adjacent layers with crossed wires, usually at right angles. More precisely, the plywood panels are an assembly of sheets of wood obtained by peeling or by slicing, these sheets being generally referred to by the term of plies, said plies being glued to each other under pressure.
  • the inner plies or the outer plies can be composed of several joined or juxtaposed plies.
  • the exterior plies may consist of one or more decorative wood veneers sliced or peeled to form decorative plywood panels.
  • the state of the art provides, for these players in the second and third transformations of wood, the plywood panels briefly described above, or particle boards, rich in glue, high density particle boards or so-called reconstituted wood panels.
  • the wood fibers of each solid wood veneer having a direction in other words an average orientation
  • the solid wood veneers are glued to each other two by two so that the directions of the fibers of each of said veneers are parallel throughout the veneer assembly.
  • the method also comprises a second cutting step, after the steaming step, to form ridges having a final length between 120 cm and 135 cm, the first cutting resulting in forming logs having a length equal to an integer multiple greater than or equal to 2 of said final length of said logs.
  • the method further comprises, at the end of the pressing step making it possible to form solid multilayer wood panels, a step of edging the multilayer solid wood panels in order to give them a substantially parallelepipedal shape.
  • the method comprises, after the edging step, a sanding step to improve the surface quality of said multilayer solid wood panels.
  • the method comprises, after the sanding step, a cutting step to form multi-layered solid wood panels having desired final dimensions.
  • An advantage of the process according to the invention lies in the fact that the multi-layered solid wood panels thus produced have a solid wood appearance: strata are not seen because the wood fibers of adjacent veneers glued together are connected.
  • the method according to the invention allows the manufacture of multi-layered solid wood panels, comprising a plurality of solid wood veneers bonded to one another, preferably parallel to the direction of the wood fibers.
  • each veneer has a thickness of approximately 3.2 mm, or in any event a thickness of between 1 mm and 10 mm, preferably between 1.5 mm and 4.5 mm, preferably still between 3.0 mm and 3.4 mm.
  • This reduced thickness is important because it makes it possible in particular to obtain a finished product which differs from a material such as reconstituted solid wood.
  • the join between layers of wood is clearly visible, in particular by the edge, because each layer has a thickness of at least 2 cm.
  • the panel comprises between 2 and 20 veneers, preferably between 2 and 16 veneers, for a total thickness of between 6 mm and 48 mm.
  • Step 1 is a debarking step. From stored logs, we remove the bark. Continuity of this debarking step 1 is also provided for a first partial cutting 2 of the logs into logs the size of which is a multiple of the desired final length of the logs with a view to unwinding (step 5). In other words, the logs obtained after this first cutting have a length equal to an integer multiple of the length of the final logs, which is preferably between 1.2 m and 1.35 m and can reach approximately 2 m.
  • Step 3 consists of steaming by immersion in hot water tanks. During this drying step, during which the logs are subjected to a significant rise in humidity and temperature, a softening of the said logs is observed.
  • stage 3 of drying the logs have a homogeneous humidity, which will also make it possible to accelerate their continuous drying (stage 6).
  • the optimum temperature and the duration of the steaming by immersion in hot water basins are chosen according to production needs.
  • the temperature and the duration of the steaming provided for in step 3 vary between 50 ° C and 90 ° C and between 24 h and 48 h respectively, depending on the wood species and the diameter of the logs.
  • Step 4 corresponds to cutting the logs from the first cutting in step 2, to form logs of a size suitable for feeding an unwinding line (see step 5).
  • logs are produced having a length of about 1.2 m to 1.35 m and a diameter of at least 30 cm. In principle, it is possible to deviate from the minimum diameter of 30 cm; however, it is preferable that the diameter of the logs is sufficient for the unwinding step to be effective. In practice, logs with a diameter of at least 80 cm and up to 110 cm can be used.
  • first and second cutting 2, 4 there may be only one cutting, before steaming 3, to directly produce logs having the desired final size, typically between 1.2 m and 1. , 35 m.
  • a first cutting 2 is preferably envisaged, after debarking 1 and before steaming 3, to form ridges having a length equal to an integer multiple greater than or equal to 2 of the length of final ridge desired.
  • a second sectioning 4 is provided, after steaming 3, to produce the logs having the desired final length.
  • each log of wood is fixed at its ends on a rotary axis using claws. As the axis turns, a knife uninterruptedly unwinds the wood to the core.
  • the product obtained is an unwound veneer.
  • the first meters of unrolled veneer (phase also known as "rounding") constitute rebuses.
  • rounding constitute rebuses.
  • whole and uniform sheets are in fact desired.
  • the unwinding 5, in the method according to the invention makes it possible to obtain layers formed in the same continuity of the tree, the rendering being faithful to the continuity of material of the tree as it has grown, with the difference processes in which pieces of wood, small slabs, are glued together laterally to form larger slabs, the latter then being stacked.
  • the unwinding thus makes it possible to produce long veneers of reduced thickness, between 1 mm and 10 mm, preferably equal to 3.2 mm, and of a width equal to the width of the bales, i.e. between 1.2 m and 1, 35 m preferably.
  • unwinding step 5 must be carried out shortly after the end of step 3 by steaming by immersion in pools of hot water, in particular within 2 hours to 12 hours following said end of step 3 parboiling.
  • the quality of the wood of the logs sent to stage 5 of peeling is important; it is specified in particular that the main species of softwood can be unrolled, namely fir, spruce, larch, douglas and various pines: Austrian black, sylvestre, laricio, etc.
  • the core (or residual core) is recovered to be used for another purpose, for example and depending on the species unrolled, table legs, handrails, interior railing supports. , decorative objects, grinding to make wafers, etc.
  • step 6 Another important step of the process according to the invention lies in step 6 of pre-cutting the fibers, which consists in cutting, in order to break them, without however creating a structural break in the unwinding, the wood fibers in so-called stretched portions. , where the peeled wood veneer tends to bend.
  • Step 7 trimming, consists in cutting the unrolled wood veneer, which forms a thin solid wood ribbon, to the required dimensions, step during which the unwanted singularities are also eliminated. It should be noted that step 7 of trimming can be carried out before or after step 8 of continuous drying, described below.
  • Step 8 is the continuous drying of the peeled solid wood veneers. Continuous drying is carried out by means of a dryer of suitable dimensions.
  • the unrolled solid wood veneers are introduced through an inlet of the dryer and, through a circulation of hot air inside, emerge dry from the dryer, having dried continuously inside the dryer.
  • the dried unrolled solid wood veneers are sorted during a step 9, which is very important in the context of the process according to the invention.
  • the veneers of unrolled and dried solid wood are thus sorted according to their quality, mainly aesthetic, between a first category corresponding to veneers intended to form the external layers (in other words of the faces and counterfaces) of the solid multi-layer wood panels and a second category corresponding to veneers intended to form internal layers (in other words internal folds) of solid multi-layered wood panels.
  • the veneers of unrolled solid wood, dried and sorted are stored temporarily by forming piles comprising veneers belonging exclusively to one of said first and second categories.
  • step 10 the veneers of unrolled solid wood, dried and sorted, are glued, then placed against each other, preferably parallel to the direction of the wood fibers, during a composition step 11, respecting the categories of veneers, and pressed (step 12).
  • a plurality of solid wood veneers are thus superimposed and glued to form a veneer assembly comprising a plurality of layers, as required, in particular between 2 and 16 layers, each layer corresponding to a wood veneer solid, with the Grade 1 veneers forming the outer layers of the assembly and the Grade 2 veneers forming the interior layers of the assembly.
  • the veneer assemblies thus formed are then pressed, the characteristics of the pressing (step 12) varying according to the type of glue used.
  • the polymerization of the adhesive sometimes requires concomitant heating.
  • the pressing time is also adapted according to the glue and the wood species used.
  • edging consists in giving the veneer assemblies a substantially parallelepipedal shape and sanding (step 14) makes it possible to improve the surface condition.
  • Step 15 consists in cutting the assemblies thus finished, to form multi-layered solid wood panels to the desired dimensions.
  • multi-layer solid wood panels can be painted, varnished, have moldings made, and, more generally, can undergo any custom cutting operation (sawing, drilling, routing, etc.).
  • the multi-layered solid wood panels can then be labeled and stored for sale.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Laminated Bodies (AREA)
EP20176871.0A 2019-05-29 2020-05-27 Herstellungsverfahren von mehrschicht-massivholzplatten Active EP3744492B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
RS20220203A RS62962B1 (sr) 2019-05-29 2020-05-27 Postupak proizvodnje višeslojnih panela od punog drveta
SI202030034T SI3744492T1 (sl) 2019-05-29 2020-05-27 Postopek za proizvodnjo večslojnih plošč iz masivnega lesa
PL20176871T PL3744492T3 (pl) 2019-05-29 2020-05-27 Sposób wytwarzania wielowarstwowych paneli z litego drewna
HRP20220322TT HRP20220322T1 (hr) 2019-05-29 2020-05-27 Proces za proizvodnju višeslojnih ploča od punog drva

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1905756A FR3096601B1 (fr) 2019-05-29 2019-05-29 Procédé de fabrication de panneaux de bois massif multicouche

Publications (2)

Publication Number Publication Date
EP3744492A1 true EP3744492A1 (de) 2020-12-02
EP3744492B1 EP3744492B1 (de) 2021-12-08

Family

ID=69104480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20176871.0A Active EP3744492B1 (de) 2019-05-29 2020-05-27 Herstellungsverfahren von mehrschicht-massivholzplatten

Country Status (12)

Country Link
EP (1) EP3744492B1 (de)
CY (1) CY1125040T1 (de)
DK (1) DK3744492T3 (de)
ES (1) ES2907487T3 (de)
FR (1) FR3096601B1 (de)
HR (1) HRP20220322T1 (de)
HU (1) HUE058037T2 (de)
LT (1) LT3744492T (de)
PL (1) PL3744492T3 (de)
PT (1) PT3744492T (de)
RS (1) RS62962B1 (de)
SI (1) SI3744492T1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112536868A (zh) * 2020-12-05 2021-03-23 冯旭全 一种新三层实木地板加工工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB421979A (en) * 1933-06-29 1934-12-31 Klinger Johann Process for the manufacture of laminated joinery members
FR1260058A (fr) * 1960-03-21 1961-05-05 Cie Ind Des Bois Contreplaques Perfectionnement aux contreplaqués dits lattés
CN1057723C (zh) * 1996-08-09 2000-10-25 昆明市木器厂 高强度电工层压木及其制备方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB421979A (en) * 1933-06-29 1934-12-31 Klinger Johann Process for the manufacture of laminated joinery members
FR1260058A (fr) * 1960-03-21 1961-05-05 Cie Ind Des Bois Contreplaques Perfectionnement aux contreplaqués dits lattés
CN1057723C (zh) * 1996-08-09 2000-10-25 昆明市木器厂 高强度电工层压木及其制备方法

Also Published As

Publication number Publication date
PT3744492T (pt) 2022-03-01
RS62962B1 (sr) 2022-03-31
CY1125040T1 (el) 2023-03-24
FR3096601A1 (fr) 2020-12-04
FR3096601B1 (fr) 2021-06-11
ES2907487T3 (es) 2022-04-25
PL3744492T3 (pl) 2022-06-20
SI3744492T1 (sl) 2022-04-29
EP3744492B1 (de) 2021-12-08
DK3744492T3 (da) 2022-03-07
LT3744492T (lt) 2022-03-25
HUE058037T2 (hu) 2022-06-28
HRP20220322T1 (hr) 2022-05-13

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