FI116210B - Process for manufacturing a glulam structure, glulam structure and use of secondary wood in a glulam structure - Google Patents

Description

116210

Method for the production of glued wood structure, glued wood structure and use of secondary wood material in glued wood structure.

The invention firstly relates to a method of producing an adhesive bore in a field, wherein a single secondary wood material, such as a plurality of elongated and incompletely edged raw boards, ribs or similars, which are attached in parallel to one another, , a phenolic resin adhesive and / or the like, a uniform multilayer glued wood structure blank which is subsequently sawn in its cross-section viewed in two or more portions substantially perpendicular to the adhesive surfaces therein, with at least one cross-section of wood cut at each of its sawn sections.

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Today, the types of glulam timber structures of the type described above are used in a wide variety of applications today in a wide variety of applications. For example, Finnish Utility Model # 1295 discloses a base structure "" "* 25 va made up of two or more glued-together multilayer wooden structures fixed in transverse or transverse directions to their tangential side surfaces; 30. In this type of solution it is possible to use »» as a multilayer wooden structure e.g.

• «glulam, plywood, plywood or similar. This,,,, · solution has been very useful in practice, since the joining surfaces of the wood structures can be optimized due to the bonding and do not need to be oversized to the extent required by the nailing joint.

116210 2

On the other hand, the publication FI 84447 discloses a method for making a wooden board, planks or the like, in which a stack of glued boards is glued on top of one another. From the stack, board blanks 5 are cut perpendicular to the adhesive surfaces, for example a floor board where incomplete board surfaces remain invisible beneath the board surface to be manufactured.

However, one major practical problem in the woodworking industry remains that significant losses, in particular from single secondary wood material such as low-edged boards, ribs or the like, are still significant. This is due to the fact that at present it is not possible to utilize the raw material in question as efficiently as it is, but it usually has to be destroyed, for example, by burning for chipping. For the actual structural utilization, the raw material as such is not suitable as it is often too inhomogeneous and the strength of the board structures made up as such cannot be guaranteed.

The purpose of the method of the present invention is to provide a decisive improvement on the above problem and thereby substantially increase the state of the art. To accomplish this purpose, the method according to the invention is essentially characterized in that the glued beams and / or sawn parts thereof are glued to each other such that at least their secondary surfaces, such as partially edged wood surfaces or the like, are adjacent to adjacent glued wood. Part of the premium quality of the exterior. , 35 in order to enable the corresponding manufacture of a glued wood structure such as glued beam or, * ·>.

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3, 116210

The main advantages of the method according to the invention are, firstly, that it provides a very simple and efficient and technically sufficiently reliable way of utilizing a single secondary wood material with a sufficient level of strength and reliability of the wood constructions formed therein for practical purposes. The invention is practicable by firstly making a secondary wood material a glulam structure blank, which, for example, by surface finishing, can produce a wide variety of glulam beam structures of all outer surface qualities. An important advantage of the method according to the invention is thus the simplicity of its application, whereby it is possible to utilize a press-based sizing technique known per se to manufacture a glued wood structure of prime grades from a currently technically useless secondary wood material.

20, Preferred embodiments of the method of the invention are set forth in the dependent claims.

The invention also relates to a glued timber structure which is: ·:

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in the preamble of the claim. The characteristics of the gluewood structure according to the invention are mainly: the features are set forth in the characterizing part of the corresponding claim.

: “Thanks to the structure of glued wood according to the invention, it is possible today to improve the technical utilization of single secondary wood material, which is generally technically unused, such as rough edged boards, scraps or the like. An advantage of the gluewood structure according to the invention is in particular the simplicity of its construction and manufacture, as it can be manufactured using the technique already existing so that a plurality of primary quality sawing surfaces are utilized in the glue structure best suited to the particular need. remnants of glulam beams construction completely equivalent to all outer surfaces. Another key advantage of the gluewood structure according to the invention is that it makes it possible to easily vary the cross-section of the glulam structure to be manufactured, e.g. to produce either symmetrical or then completely asymmetrical structures. Another key advantage of the glued wood structure according to the invention is that it is possible to manufacture existing technology without the use of significant prime quality glue-wood structure from today's virtually unused waste wood.

20

Advantageous applications of the gluewood structure according to the invention are disclosed in the dependent claims.

The invention also relates to a new use of a single secondary wood material, such as low-edged raw boards, scraps or the like, for the manufacture of a glued beam of outer surfaces of primary wood.

:. ·. As stated above, the use of the secondary wood material according to the invention enables a significant technical improvement in that the material currently classified as waste wood, as it is currently, can be utilized technically in the manufacture of fully glued timber structures.

'.I This results in significant savings for the woodworking industry, since it is possible for the woodworking industry in question. 116210 5 as such where there is no need for disposal, for example, by incineration and / or chipping.

In the following description, the invention is illustrated in detail with reference to the accompanying drawings, in which Figure 1 illustrates a central general principle of the method of the invention 10, showing a side view and 3a to 3c 25 illustrate, by way of example, cross-sections of the glued wood structure according to the invention in some alternative cross-sections.

The invention relates to a method of gluing wood structure. . 30, wherein a single secondary wood material, such as a plurality of elongate and horizontal edge boards, rims, or the like, which are mounted parallel to one another, are assembled, e.g. in the first-35 principle of FIG. , using dispersion, phenolic resin glue and / or the like, a single multilayer glued wood structure blank 1, which is subsequently sawn in two or more portions 1 'substantially as shown in cross section thereof, e.g. L against 5 in a perpendicular direction such that at least one cutting surface A of each of the parts 1 'thereof is sawn, for example, as shown in Fig. 2, consists of wood surfaces l'a of full cross section. The glued beams 1 and / or the sawn parts 1 'are glued 10 L' to each other so that at least their secondary qualities, such as the side surfaces B consisting of incompletely edged wood surfaces 1'b or the like, are opposite to the adjacent part 1/1 ' glue beams, such as glue beams or the like. Some such exemplary embodiments are shown in Figures 3a-3c.

In particular, as shown in Fig. 1, it is possible to glue the bore 20 to the required number of portions as shown in the sectional view xx, so that, in particular, in the exemplary area O ···, it is possible to perform the sawing ··· operations. in the raw boards 25 no longer reach the sawing surface A, whereby the cutting surface A of each part 1 'sawn from the blanks is corresponding to: ·: as shown in Fig. 2. In the case of standard board, a KH glued-on joint, of the type shown in section x-x, is obtained:, ·. The width of 1 l is typically about 100-120 mm, whereby the wood surface l'a of the sawing surface A is typically 10 to 25 mm.

Thus, firstly, it is possible to assemble, for example, 35 sheets of glulam, where the utilized sawing surface A corresponds. fully glued laminated board of the highest quality. Thus, for example, as shown in the sectional view x-x of Figure 1, e.g.

11621 O

By attaching the detached portions 1 'to each other, it is possible to produce a uniform glue board structure by gluing L' similar portions 1 'to each other, superimposed on the dotted line 5 in Fig. 2.

In a preferred practical application, the glued wood structure sand 1 and / or the sawn parts 1 'are machined on the KH to be bonded to the secondary quality side surfaces) and / or on the unprocessed outer surfaces B e.g.

by planing, in particular, to form a glued beam beam structure of all outer surfaces, and gluing them together so that the secondary quality side surfaces B of the glued beam blocks 1 and / or the parts 15 cut therefrom remain within the glued beam structure to be assembled therefrom.

In a further preferred embodiment of the method, the glued wood structure blanks 1 and / or the sawn parts 1 'are glued L' e.g. with the intermediate bore * of at least secondary quality B, such as the beveled wood surfaces 1'b or the like. · '· 25 field VPs such as veneer, plywood or similar. In practical experiments there are in particular six. veneer has been found to work in such applications »». ··. ideally.

. . The invention also relates to a glued wood structure consisting of a single wood material, such as several, parallel to each other, glued surfaces, preferably urethane, dispersion, phenolic resin glue and / or similar elongated wood material bonded to one another. , such as a board, l., 'lath or the like, into a single glued wood structure. The glulam structure consists, at least in part, of secondary wood material, such as partially edged raw boards, ribs or the like, formed firstly of a multilayer glulam structure 1 sawn in its cross section at two or more sections 1 ' such that at least one of the sawing surfaces A of each of its sawn parts 1 'consists of, for example, as shown in Fig. 2, wood surfaces l'a of complete cross-section. Specifically, with reference to e.g. the glued wood structure applications shown in Figs. 3a to 3c, the glued wood structure blanks 1 and / or the sawn parts 1 'are glued to each other such that at least their secondary quality, such as side edges l'b or the like B are against 15 adjacent portions of 1/1 'of the glulam structure, in particular to provide a glulam structure such as glulam beams or the like, of primary grades.

A further preferred embodiment of the glued beams structure is the glued beams blank 1 and / or the sawn parts 1 'machined from KH to be bonded to each other by secondary planing, · . In addition, particularly with reference to the exemplary * * * embodiments shown in Figures 3a to 3c, the glued wood structure blank 1 and / or the sections 1 'thereof are of secondary quality: 30 side surfaces B disposed throughout to be assembled therefrom. inside the glued beam structure.

M. ' Further, with particular reference to the preferred embodiment · '... · shown in Fig. 3c, the glued beams blank 1 35 and / or the sawn parts 1' are glued L at least

of secondary quality, such as l'b of semi-edged wood surfaces or similar B

116210 9 facing each other through a VP between the interstices, such as veneer, plywood or the like.

The invention also relates to the use of a single secondary wood material, such as rough edged boards, ribs or the like, in the manufacture of a glued beam beam or a blank thereof of prime quality, wherein the glued beams 1 produced in the first step I are sawn in two or 3 ', then one or more glued beams 1 and / or sawn part 1' are glued to each other, for example, in accordance with the principle shown in Figures 3a-3c, so that at least their secondary surfaces B, e.g. are against the adjacent part 1/1 'of the glued wood structure.

It is to be understood that the invention is not limited to the foregoing or to the embodiments described, but may be modified within the scope of the inventive concept. according to the specific needs of each application. Then '; Depending on the application, the junctions of, for example, the manufactured '·· glued beams or constructions thereof may be secured, for example, by nailing, screwing or the like. In addition, in the method according to the invention, it is also possible to utilize, in suitable portions, the glulam structure to be produced in a uniform manner, and / or e.g.

30 plywood, plywood or similar. Naturally, the process according to the invention is capable of being difficult. of different cross-sections, whereby, for example, a single secondary wood material can be fixed to one another also in different longitudinal positions / positions. Also, the cross-section of the glued wood structure according to the invention is not bound to the rectangular shape shown in the drawings, but it may be 116210 ίο in certain applications e.g. triangular or multi-faceted. Thus, the invention can also be utilized in the manufacture of wood structures of substantially non-rectangular dimensions. 1 »· • tl ·» · • t «· · I» • t · • · ·

Claims (7)

116210 11 Claims; A method of making an adhesive wood structure, wherein a single secondary wood material, such as a plurality of elongated and incompletely edged raw boards, scraps, or the like, which are attached in parallel to one another, are assembled in step (I) with their mutual adhesive surface, using a phenolic resin-10 adhesive and / or the like, a single-layered multi-layer adhesive beams (1) which is subsequently sawn in its cross section in two or more portions (II) substantially perpendicular to the adhesive surfaces (L) therein such that at least one of the sawing surfaces (A) of each of its sawn parts (11) consists of wood surfaces (l'a) of full cross-section, characterized in that the glued beams (1) and / or the sawn parts (1 ') thereof are glued (L'). to each other such that at least their secondary qualities, ku the side surfaces (B) of incompletely edged wood surfaces (1'h) or the like (B) are against the adjacent part (1/1 ') of the glulam structure, in particular the glulam structure of the exterior quality, such as glulam beams or the like. *> · Dollars. • · t • · Method according to Claim 1, characterized in that the glued beams (1) and / or the parts (1 ') sawn therefrom are machined (KH) with each other • · t ···, with their secondary secondary surfaces to be glued • and / or unprocessed by external planing (B) V * or planing, in particular to form a beam structure 35 of primary quality of all outer surfaces, and gluing them together such that the secondary surfaces (116210 12) of the laminated timber billets (1) »<and / or all remain within the glulam beam structure that they consist of. Method according to Claim 1 or 2, characterized in that the glued beams (1) and / or the sawn parts (L1) thereof are glued (L ') at least of secondary quality, such as the partially edged wood surfaces (1'b) or the like ( B) via a spacer (VP) interposed between them, such as veneer, plywood or the like. 4. Glulam structure consisting at least partially of a single secondary wood material, such as a plurality of (s) parallel to each other, preferably with urethane, dispersion, phenolic resin and / or similar, elongated and non-angular, 20, sawn in its cross-section as viewed in two or more portions (11), substantially perpendicular to the adhesive surfaces (L) therein, such that each of the »* r» 'sawn *; ·: At least one cutting surface (A) of 25 parts (1 ') consists of wood surfaces (l'a) of full cross-section, ·. *. characterized in that the glulam (1) or • ·. ···. the sawn parts (l1) of which are glued (L ') to each other such that at least their side surfaces (B) consisting of woody edges (l'b) or the like (...) of secondary quality are against the adjacent part of the glued timber structure (1/1) '), in particular to provide a glued wood structure of prime quality, such as glued beam or the like. . ·: ·. Glue beams according to Claim 4, characterized in that the glue beams (1) and / or the sawn parts (1 ') thereof are machined (KH) by their secondary secondary surfaces and / or unprocessed outer surfaces (B). by planing or the like, in particular to form a structure of glued beam beams 5 of all outer surfaces, and whereby the secondary side surfaces (B) of the glued beams (1) and / or parts (1 ') thereof are disposed throughout the glued beam. Glue wood structure according to Claim 4 or 5, characterized in that the glued wood structure blank (1) and / or its sawn parts (1 ') are glued (L') of at least secondary quality, such as partially edged wood surfaces (l'b) or the like. -15 with their faces (B) facing each other through an intermediate wood structure (VP) such as veneer, plywood or the like. 7. Use of a single secondary wood material, such as solid edged boards, strips or the like, in the manufacture of a glued beam of exterior surface, which is sawn in the first step (1): (1) II) viewed in cross section into two or more parts (1 '), followed by Γ': one or more glued beams (1) and / or sawn parts (1 ') of it' 'h are glued together. ···. at least of their secondary quality, such as the side-y · 30 surfaces (B) consisting of woody edges (1'b) or the like, which are incompletely edged, are against an adjacent part (1/1 ') of the glued wood structure. 116210 14