FI104708B - Glue-laminated wood element - Google Patents

Description

r 104708

FIELD OF THE INVENTION The present invention relates to a wood profile and an adhesive wood element r produced by gluing them together, which can be used e.g. as a log, as glue stick and as a solid wood board.

In a traditional full-timbered log, there is a major problem with cracks on saw surfaces. Horizontal cracks through the wall degrade the thermal insulation capacity of the wall. Cracks also collect moisture and impurities, reducing the life of the structure. In load-bearing beams, such cracks reduce the load-bearing capacity of the beam: considerably. This results in additional beam layers and heavy solutions, which are often expensive to implement.

Current planed logs have sought to eliminate this problem. The logs are sawn into planks and planed, glued and planed several times as needed. These methods are characterized by the fact that there are many passes through the machine tool per log, which increases the machine time and increases the manufacturing costs. Each pass through the machine also takes away part 1 of the raw material and increases the waste rate, especially if full-price logs are used. However, the problem of cracking may not be eliminated and the percentage of wood wasted remains high, as can be seen in Fl 79966 (B 26G 11/00).

The profile shape may also be cumbersome and expensive to implement, or several different profile profiles will need to be used, such as in CH 578661 (E 04C 3/12) and DE 304 8359 (E 04C 2/46), whereby the waste becomes even greater.

The advantage of this new method is that, when working with the correct thickness of wood I, the raw material waste rate is kept to a minimum and the cracks caused by drying can be eliminated. Other benefits include reduced turnaround times and low raw material costs. The manufacturing cost I and the price of the entire glulam element are advantageous for the reasons mentioned above. The tongs provide an additional advantage for gluing the center of the glue stick. gluing and side surface machining. The wood profiles of the present invention can be assembled into a solid glued wood element without cracks of the required size. When using the element as a planing log, the profile tongue forms the log ~ back and charge.

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The basic idea of the invention is that the glued wood element is made from wood profiles machined into opposite tongues on the opposite sides, the blanks of which are preferably the right thickness. By the process of the invention cracks in the .... profile blank are obtained and, if desired, the soft wood core removed. The characteristic of the glued wood element according to the present invention is that shown in. in the characterizing parts of claims 1-4.

The invention will now be described in detail with reference to a preferred embodiment, with reference to the accompanying Figures 1-6.

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Fig. 1 shows a cross-section of fibrous or log wood, i.e., wood blank, 1a and 1b sawing lines disposed in accordance with the invention, and 1c with any remaining surface board.

Figure 2 shows a plank sawn in the sheath, i.e. a blank of a wood profile, according to the invention.

Fig. 3 shows an example of positioning of tongues of a planed wood profile according to the invention, whereby the cracks 3a created during drying are removed by planing, a positioning example of 3b 'is applied to the whole wood blank.

Fig. 4 shows a wood profile according to the invention, 4a male tongue and 4b female tongue.

Fig. 5 shows a pink glue glued from wood profiles according to the invention, 5b an outline of machined sides of a glued wood element.

Fig. 6 shows a ready-made glued wood element according to the invention, for example a log.

The present invention relates to a laminated planed log or glued beam 6 manufactured by a novel process. The wood material 1b of the correct dimensions and thickness is selected as the wood blank 1 required for the manufacture. This results in a low percentage of wasted wood. At its most advantageous, fiber-length wood obtained from first thinning can be used, whereby the purchase price of the raw material is almost half the price of the log wood. The length of wood used is not very demanding. Since the finished log element consists of several wood profiles 4 glued together, end-to-end joints can be made to each layer. The joints are located at different points on different layers and thus do not impair the strength properties of the glulam element.

The wood blank 1, considered suitable in thickness, is conventionally sawn into the sheath. However, the saws are positioned so that the upper saw 1a is made close to the bark of the wood blank, whereby it functions e.g. as a flat and evaporating surface during drying. As the wood dries, the wood also cracks. The lower saws 1b are brought closer to the core of the wood to direct the drying cracks to this surface.

The dried plank 3 is planed from the top, for example, to a convex 4a and a concave 4b, respectively. . ·. 4. The purpose of the lower or groove 4b is also to eliminate the cracks 3a formed during drying, thereby obtaining a wood profile without cracks.

; The correctly dimensioned anchors 4a, 4b allow the precise utilization of the wood material 3b and mm. centering the profile bench in the gluing step 5. The shape of the wood profile 4 makes it possible to grow the pink according to the requirements. By the same method, '· *' can be made of planed logs as well as glued beams, solid wood panels, etc. In the log element, the tongues 4a and: T: 4b additionally form the back and charge of the finished log. After gluing, the # 5 laminated element 5 from wood profiles is machined to its final dimensions 6, whereby the tongues can act as guide surfaces.

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104708

The completed, breathable, non-cracked and low-descent log element may have a rectangular cross-section, for example. The shape of the tongues 4a, 4b of the wood profile 4 may be other than the gently semi-circular shape used in this embodiment. The profile 4 can also be planed from already sawn timber. If necessary, the sides of the profile glue 6 glued to the element can be cleaned after gluing.

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Claims (4)

1. Glued timber elements (6), made of two or more glued together wood profiles (4), made by sawing and planing, characterized in that the wood blank of the wood profile (2) is made of eccentrically said wood blank ( 1) say that the Upper Sow Line (1a) lies completely close to the bark further away from the wood core and acts as evaporation and planar surface during drying, and the Lower Sow Line (1b) is clearly closer to the wood core and works except the above mentioned! surface that collects cracks (3a) during drying, and that the dried plank or wood blank of the wood profile (2, 3) has been planed into spontaneous profile shape (4), where the sponge (4a) and the hollow (4b) on opposite sides of the wood profile ( 4) are so shaped that the most cracks (3a) can be removed in connection with the planing of the concave shaft (4b), and the concave shaft is uniform with the other side of the convex shaft (4a) so that it is possible to Squeeze them tightly together (5) through gluing and form a laminated wood element (6) of the desired size. 2. Glue wood elements according to claim 1, characterized in that the distance of the lower cutting line (1b) on the wood blank (1) to the wood core is such that most of the possible drying cracks (3a) are formed on this surface. 3. Glued timber elements according to claim 1, characterized in that the grooves (4a, 4b) of the wooden profile (4) are formed so that when the planing of the concave shingle (4b) the wood core can also be removed. 4. Glued timber elements according to claim 1, characterized in that the timber (4a, 4b) of the wood profile (4) is planed from already finished wood. • <I · • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · to-f-to-be 1 t 1