DK1950016T3 - Fremgangsmåde til fremstilling af et træprofil - Google Patents

Description

The invention relates to a method for manufacturing of a wooden profile made of several layers of lamellae according to the preamble of claim l. Such a method is known from US 3 191522.

Devices and methods for manufacturing of multi-layered components are already known. For example, patent application FR2502884 describes a device for manufacturing wooden profiles with greater length made of a dielectric material of elements contacting each other and glued together. The device comprises a microwave tunnel oven with rectangular cross section which is operated at 2450 MHz or 434 MHz and is either moved along with the wooden profile or is standing still, wherein in the latter case, the wooden profiles pass through the inside of the oven. The document shows for example the assembly of a beam of individual boards which are attached to each other by means of finger-jointing interlocks, wherein the joints in the individual layers and the joints in adjacent layers are offset against each other along the beam. In patent application FR2503015, a method is described for gluing rafter beams at which the glue is cured by the application of microwaves. Both documents do, however, not show in detail how the individual layers are fixed against each other until the curing of the glue.

Patent application EP103396 relates to a device for simultaneous application of pressure and microwaves onto curable units. It includes a continuous press with two circulating endless metal press belts between which a clamping range is formed, wherein the press belts apply pressure onto the curable units which are engaged between them. A pressing space is formed by the two belt surfaces and the two side walls, and devices are provided with which microwaves interact onto the curable units from at least one microwave generator via a waveguide and a surface adjacent to the pressure space. Patent application EP052359 describes a continuously working press for the manufacturing and/or coating, veneering or the like, of a single or multi-layer panel web of a fleece made of wood chips, wood fibers or the like. This device comprises an upper run of a lower endless circulating belt and a lower run of an upper endless circulating belt that is running with a predetermined velocity and is preferably made of steel. Thereby, a slide coating is provided extending across the whole width of the press area and is attached onto an upper and lower thrust bearing, across which the incoming belt is sliding by means of a pressurized as well as liquid lubricant. Despite the high effort at their manufacturing and their operation with these belt presses, it is not possible to achieve sufficiently high press forces for many layered products.

The underlying problem of the invention is to establish a method for manufacturing wooden profiles while minimizing the raw materials used.

The problem of the invention is achieved by the features of claim l, whereby on the one hand, the strength property of the gluing is increased and on the other hand, not insignificant raw material savings and manufacturing cost savings are achieved.

It is preferred that the lamellae forming the layers comprise more or less the same width, whereby also material savings are achieved and manufacturing times are saved in end calibration, for example by milling, planing etc. that follows the manufacturing process.

It is possible that the layer is formed by at least one lamellae extending across the length of the wooden profile, whereby additional manufacturing steps are saved.

It is also preferable if the layer is formed of several lamellae arranged in a row in a direction extending over the length, because due to this, short pieces can be used for the manufacturing of the wooden profile.

Thereby, it is preferable if the lamellae are connected to each other at the front ends.

An increase of the strength properties of the wooden profile is achieved by a fingerjointing formation towards the front end connection of the lamellae arranged in a row in the direction of their longitudinal extension.

According to the inventive method, as it is described in claim 1, an endless manufacturing of the wooden profile and thus, a material-saving manufacturing is achieved.

In the following, the invention is described in more detail by the embodiments illustrated in the figures.

It shows:

Fig. l a cut side view of an embodiment of the facility;

Fig. 2 a perspective view of the facility of Fig. 1 without a housing;

Fig. 3 a cross section through a press unit in the open position prior to closing;

Fig. 4 a cross section through a press unit in the closed position prior to opening;

Fig. 5 a cross section through a press unit in a second embodiment of the device;

Fig. 6 a cross section through a press unit in a third embodiment of the device;

Fig. 7 a cross section through a press unit in a fourth embodiment of the device and

Fig. 8 a cross section through a press unit of a fifth embodiment of the device;

Fig. 9 the facility for manufacturing of the wooden profile in a simplified view;

Fig. to the wooden profile manufactured in the facility in a schematic view.

Introductory, it is noted that in the different described embodiments, the same parts are denoted with the same reference signs and same device designations, respectively, wherein the disclosures contained in the complete description can be transferred in the same meaning to the same parts with the same reference signs and the same device designations, respectively. Also, the position indications chosen in the description, for example above, below, sideways, etc. are referred to the described as well as displayed figure and have to be transferred in the same meaning by a position change to the new position.

The embodiments described in the following relate to a facility for manufacturing glued beam-shaped wooden profiles, so-called glued wood of separate, panel-shaped lamellae. Such beams are also designated as laminated timber. However, the invention is not limited to beams nor to wooden profiles. Moreover, the lamellae may have the shape of sticks, the manufactured wooden profiles may be panel-shaped and the used material may be, for example, plastic, cork or itself a material made of lamellae.

Figure i shows a cut side view of a first embodiment of the facility according to the invention. Figure 2 shows the same embodiment of the facility in a perspective view di agonally from above, wherein for a better view of the single components, the housing 9 covering the facility is left out. The wooden profile manufactured by means of the facility is denoted by 1 in the figures and is moved in a transport direction denoted with arrows 10 from an inlet side 4 towards an outlet side 5 through the facility. The wooden profile 1 is made of individual lamellae 2, wherein any two lamellae 2 contacting each other in transport direction 10 at the front end are connected to each other by means of a finger-jointing connection 8. A press and transport device 3 for the wooden profile 1 forms an important component of the facility. It comprises several press units 6 arranged, one after another, in transport direction 10 and connected with each other by circulating traction means 7, which are described in more detail later by means of Figs. 3 to 7. Each press unit 6 is able to apply a pressing pressure of 40 to 50 N/cm2 onto the wooden profile 1 that is to be glued during the transport through the facility. The press units 6 are compressed by clamping unit 11 arranged near the inlet side 4 and are again relaxed by an opening unit 12 arranged near the outlet side 5, so that the wooden profile 1 is released. The endless circulating traction means 7 may be formed as a belt, a chain, a rope or the like. In the example illustrated in Figs. 1 and 2, the traction means 7 are formed as two parallel belts arranged adjacent to each other, which are guided over a driving roll 24 and a guiding roll 25 and at which the press units 6 are attached spaced apart. Between the driving rolls 24 and the guiding rolls 25, supporting rolls 26 are arranged.

In Fig. 1, a stabilizing device 27 is arranged across the press and transport device 3, and also comprises endless circulating traction means 28. The traction means 28 of the stabilizing device 27 are guided across a driving roll 29 and a guiding roll 30. The stabilizing device 27 is used to prevent an unwanted deformation of the press units 6, while these compress the profile 1. Therefore, traction rods 31 are arranged at the traction means 28, and their distances between each other correspond to the distances of the press units 6. The traction rods 31 are attached onto the press units 6 near the inlet side 4, before these are clamped and they are declamped after relaxing from the press units near the outlet side 5. The effect of the traction rods 31 will become clearer further below in the description of Figs. 3 and 4. Supporting rolls 32 ensure that the traction rods 31 remain connected with the press units 6 as long as they apply pressure onto the wooden profile 1.

In order to accelerate the curing of the glue connecting the lamella 2, the facility is equipped with a heating device in the form of microwave generators 13 arranged one after the other in transport direction 10. They are adjustable perpendicular to the transport direction 10 by adjustment drives 15, as indicated by the double arrow 14 in Fig. 1. Due to the adjustability of the microwave generators 13, an adjustment to different wooden profiles 1 manufactured by this facility is possible. The wooden profile 1 is heated up to 1250 C, whereby the curing time of the glue is reduced to a few minutes. Due to the heat and the pressure, lignin exits the wood, the strength is decreasing significantly and the deformability increases such that it can be spoken of a plastic state of the wood. Inaccuracies, especially differences in the thickness that exist due to the elimination of a planing process of the blanks as well as irregularities are smoothed out due to the plasticity in the press units 6.

In order to protect persons working in the facility against microwaves, the respective area of the facility is protected in this area by a completely covering housing 9, as it is especially distinctively illustrated in Fig. 1. In the area of the inlet side 4, an inserting device 16 and in the area of the outlet side 5, an outputting device 17 for the wooden profile 1 is arranged. The inserting and outputting devices 16 and 17, respectively, fulfill the function of microwave sealings and they are adjustable due to the adjustment of the dimensions of the wooden profile 1, as it is indicated by the double arrow 18 in Fig. 1. This adjustability is not limited to the direction shown in Fig. 1, but parts of the devices 16 and 17 are also adjustable in a direction perpendicular to the drawing plane of Fig. 1. The inserting device 16 and the outputting device 17 comprise electrically conducting, bending-elastic elements like cords, wires, tapes or lamellae arranged in a comb-like or brush-like structure.

In order to exactly monitor and control the heating of the wooden profile 1, temperature sensors 19, 20 and 21 are arranged in the facility, which preferably work contactless. In the example according to Fig. 1, a first temperature sensor 19 in the area of the inlet side 4, a second temperature sensor 20 somewhat in the center of the facility and a third temperature sensor 21 in the area of the outlet side 5 are arranged, so that it is possible to monitor exactly and, as the case may be, to influence the temperature increase in profile 1 that was initiated by the microwave generators 13.

In Fig. 1, a driving control 22 for the motors, not shown, of the driving rolls 24 and 29 as well as the adjustment drives 15 of the microwave generators 13 is schematically il lustrated. A temperature control 23 is provided for the operation of the microwave generators 13. Furthermore, lines 33 are drawn in for the input of facility components and for signals that are exchanged between facility components and the driving control 22 or the temperature control 23.

Not illustrated in the figures, but also belonging to the facility, a glue application device is arranged in the area of the inlet side 4 outside of the housing 9, with which glue is applied onto the lamella prior to the assembling of the lamella 2 to the wooden profile 1. For this, different methods known from the prior art are suitable, with which glue may be applied onto the whole area or in parallel strands. Such methods may, for example, be that the glue is applied by means of rotaiy brushes, sprayed from nozzles or may be pressed in stripes from a pressurized tube comprising holes. Near the outlet side 5, outside of the housing 9, a not shown cutting device for cutting the wooden profile 1 to the desired length is located. Between the outputting device 17 and the cutting device, a cooling area may be arranged, so that the heated profile may cool down prior to the cutting.

Figures 3 to 7 show details and different embodiments of the press unit 6. In Fig. 3, a first embodiment of the press unit 6 is illustrated in an open position. A U-shaped carrier part 34 receives the blanks 2 assembled to the wooden profile 1 such that they lay on the base 35 of the carrier part 34 between a first leg 36 of the carrier part and a press panel 42. The carrier part 34 is attached to the traction means by means of attachment parts 38, which is formed as a chain 39 in this example. The press panel 42 is movable in the direction towards the first leg 36 by a clamping device 40. The clamping device 40 is formed as a knee lever mechanism 41 in this example, arranged between the press panel 42 and a support panel 43. The support panel 43 is supported by a spindle 44 which is supported itself in a spindle nut 45 arranged in the second leg 37 of the carrier part 34.

Before the press unit 6 is closed, a traction rod 31 is attached connecting the first leg 36 and the second leg 37 of the carrier part 34 as this was already described above in connection with Fig. 1. This traction rod 31 has the function to prevent that the carrier part 34 is deformed due to the force of the clamping device 40, for example such that the first leg 36 and the second leg 37 are bent away from each other and/or the base 35 is bent. Centering pins 48 are provided at the first leg 36 and the second leg 37, which engage into centering openings 49 present in the traction rod 31. For a better reception of the arising traction forces, the traction rod 31 may spread sideways across the first leg 36 and the second leg 37.

In order to adapt the facility for a certain wooden profile 1, the clamping devices 40 have to be adjusted according to the width of the wooden profile 1 to be manufactured, in such a way that the knee lever mechanism 41 may be brought up close to the dead center during application of a maximum pressing force. For this application, the spindle 44 is rotated until the press panel 41 is in contact with the wooden profile 1, wherein the knee lever mechanism 41 is in the position shown in Fig. 3.

For closing the press unit 6, the clamping device 40 is activated by the closing unit 11. The latter is formed for example as a pneumatic or hydraulic piston-cylinder unit and presses the knee lever mechanism 41 from the position illustrated in Fig. 3 into the position illustrated in Fig. 4. Thereby, the closing unit 11 engages through an opening 46 for a short time, which is provided therefor in the base 35 of the carrier part 34. Not illustrated stops prevent that the knee lever mechanism 41 may be moved further than the position illustrated in Fig. 4. The pressing force is maintained due to the elasticity of the wooden profile 1. For smaller wooden profiles 1 and/or certain less elastic materials, springs may be provided to maintain the pressing force, for example plate springs (not illustrated), which are arranged between the spindle 44 and the press panel 43 or between the spindle nut 45 and the second leg 37 of the carrier part 34.

Figure 4 shows the press unit 6 shortly prior to the opening of the knee lever mechanism 41 by the opening unit 12, which engages to this end shortly through an opening 47 in the traction rod 31. As soon as the press unit 6 is relaxed, the traction rod 31 may be taken off, so that the press unit 6 can be turned downwards around the driving roll 24 while the profile 1 is transported further through the outputting device 17.

The closing unit 11 and the opening unit 12 can be arranged in the facility in such a manner that their position is adjustable according to the adjustment path of the spindle 44 perpendicular to the transport direction 10, so that their force is acting as precisely as possible on the knee joint during closing and opening of the knee lever mechanism. If the press and transport device 3 is moving relatively slow, it does not have to be stopped for closing and opening the press units 6. It only has to be ensured that the provided openings 46 and 47 for the short passing through of the closing unit 11 and the opening unit 12 are large enough. However, it is also thinkable that the press and transport device 3 is shortly stopped for closing and opening the press units 6. The distance between the closing unit 11 and the opening unit 12 in the transport direction 10 is thereby a integer multiple of the distance between two press units, so that simultaneously, a press unit 5 near the inlet side 4 may be closed by the closing unit 11 and a press unit 5 near the outlet side 5 may be opened by the opening unit 12.

Figure 5 shows an alternative to the traction rod 31. In its place, supporting rolls 50 are provided for a sideways supporting of the first leg 36 and the second leg 37 of the carrier part 34, wherein the supporting rolls 50 are received in supporting blocks 41, that itself are attached stationary to a facility frame 52. Another alternative to traction rod 31 is illustrated in Fig. 6. In order to prevent bending of the first and second legs 36,37 and/or the base 35 of the carrier part 34, the base 35 is enlarged on both sides across the first and second leg 36, 37 by a base extension 53, 54. Between the first leg 36 and the base extension 53, at least one supporting rib 55 is arranged, and between the second leg 37 and the base extension 54, two supporting ribs 56 are preferably arranged, namely one on each side of the spindle nut 45. Due to these measures, an unwanted deformation of the carrier part 34 due to the arising clamping forces is prevented.

Figure 7 shows an alternative clamping device 60 which is mainly comprised of a piston-cylinder unit 57 arranged at the first leg 36 of the carrier part 34. The latter may be established for a pneumatic or preferably for a hydraulic operation. Due to a higher pressing force achievable, the hydraulic embodiment is preferred. The piston-cylinder unit 57 acts with its piston rod 58 onto the press panel 42 in the direction of the double arrow 59. For the retraction of the piston rod, a spring 61 is provided in the piston-cylinder unit 57. For closing the clamping device 60, the piston-cylinder unit 57 is supplied with a pressure fluid via a coupling device 62 connectable to a connection part 64 in the direction of double arrow 63. The connection part 64 is provided with a nonreturn valve, so that the pressure inside the cylinder of the piston-cylinder unit is maintained when the coupling device 62 is released from the connection part 64. In order to provide enough time for filling the piston-cylinder unit with pressure fluid, the coupling device 62 may be designed in such a manner that it is movable in transport direction 10 and follows the press unit 6 on part of the transport path until the desired pressure is achieved. Alternatively, the press and transport device 3 may be stopped until the desired pressure is achieved in the piston-cylinder unit 57. For opening the clamping device 60, a coupling device, not illustrated, is provided near the outlet side 5, which is able to open the present non-return valve in the connection part 64, so that the pres sure fluid present in the piston-cylinder unit 57 flows by effect of the spring 61 back into the fluid container and the piston rod 58 moves to the right in Fig. 7. Means for adjusting the span width of this press unit 6, as described for the embodiments of Figs. 3 to 6 with the example of spindle 44, are not necessary in this embodiment, because the stroke of the piston-cylinder unit 67 may be dimensioned such that wooden profiles 1 with a minimum up to a maximum width may be clamped. In contrast to a knee lever mechanism, the desired force is the same across the whole stroke in a hydraulic or pneumatic piston-cylinder unit.

Figure 8 shows a modification of the press unit 6 of Figs. 3 to 6. In contrast to the press units described previously, in the embodiment of Fig. 8, the profile 1 assembled from the lamellae 2 is not clamped between the press panel 42 and the first leg 36 of the carrier part 34, but between the press panel 42 and the support panel 43. As in the embodiments of Figs. 3 to 6, the spindle 44 is connected to the support panel 43 for adjustment of the press unit 6 to the different wooden profiles 1 with a different width, however, the knee lever mechanism 41 is arranged between the press panel 42 and the first leg 36. This arrangement has the advantage that the knee lever mechanism 41 remains in its sideways position regarding the carrier part 34 independent of the width of the wooden profile 1 and thus, a sideways adjustment of the closing unit 11 and the opening unit 12 can be neglected.

All parts of the facility, particularly those of the press units, especially the parts coming into contact with the wooden profile 1 and with the glue exiting, are formed from stainless steel. Basically, it is also possible to rotate the whole facility up to 90°, so that the lamellae 2 forming the wooden profile 1 lay on the first leg 36 of the carrier part 34 and are pressed together from above by the clamping device 40 and 60, respectively.

In the following, the operation of a facility according to the invention is described by means of the example of Figs. 1 to 4.

The lamellae 2 are sawn and, if necessary, are brushed in longitudinal or transversal or crosswise direction or they are grounded. A planing of the blanks is, as already noted -not necessary, because small irregularities are smoothed out by the press forces in the press units 6. If the lamellae 2 are bent, particularly if they are arched, it is indicated to apply relaxing cuts onto them to reduce the necessary press force during gluing, if necessary. It is often the case that a single cut of about 0.2 mm width and a depth of about half the thickness of the lamella 2 is enough. In lamellae 2 with a width of 250 mm and more, also several parallel relaxing cuts may be applied. Preferably, a finger jointing connection 8 is applied to the lamellae 2 on the front faced connection areas at which they are later in contact in the wooden profile 1 with adjacent lamellae 2 in the longitudinal direction.

The lamellae 2 prepared in this manner are provided with glue in a glue application device on those surfaces which come into contact later in the wooden profile 1 with neighboring lamellae 2. Then, the lamellae 2 are assembled to the wooden profile 1 and are inserted into the facility through the inputting device 16. By attaching the lamellae 2, care must be taken that the connection areas or finger jointing connections 8 to neighbored layers are offset to each other in the longitudinal direction of the wooden profile 1. Thereby, it is not necessary that all lamellae 2 have the same length. Furthermore, not all lamellae 2 have to have the same thickness. Wooden profiles 1 with several layers of different lamellae 2 of a different thickness may be manufactured, wherein of course the lamellae 2 in the same layer have the same thickness. The assembling of the lamellae 2 is effected on a table or a roll guide, the surface of which is on the same height as the bases 35 of the carrier parts 34 of the press units 6.

Before a new wooden profile 1 is manufactured, the clamping devices 40 have to be adjusted to the overall width of the wooden profile 1 in that the spindles 44 are adjusted such that the knee lever mechanism 41 may be barely closed by the closing unit 11. Thereby, a maximum press force is achieved.

In the area of the guiding rolls 25 and 30, the wooden profile 1 is guided to a surface on the base 35 of a carrier part 34 of a press unit 11 moving in transport direction 10. Shortly after the press unit 6 has passed the guiding rolls 25 and 30, a traction rod 31 is attached to the carrier part 34 which is fixed to the traction means 28 and moving with the same velocity in the same direction (10). Afterwards, the press unit 6 is coming into the area of the closing unit 11, which activates the knee lever mechanism 41, so that the wooden profile 1 in the press unit 6 is compressed. In the embodiment according to Fig. 1, the wooden profile 1 is compressed every time by seven press units 6 arranged adjacent to each other in transport direction 10.

On the way between the closing unit 11 and the opening unit 12, the wooden profile 1 is guided below the microwave generators 13 and is heated by them up to about 1250 C, wherein the wood becomes plastic and the lamellae 2 are pressed towards each other in close contact. The temperature of the wood and/or of the glue is monitored by the temperature sensors 19 to 21 and is influenced by the temperature control 23 according to a saved specification. For heating up the wooden profile 1, preferably frequencies from 950 MHz or 2450 MHz are applied, wherein these frequencies are applied optionally individually, alternatively or simultaneously. According to the temperature curve, said frequencies may be applied to the profile continuously or in intervals. The heating of the wooden profile 1 is in accordance with the transport velocity such that the glue is cured before passing the outputting device 17.

After passing the outputting device 17, the wooden profile 1 again reaches a table or a roll guide, where it cools down slightly. Afterwards, the wooden profile 1 is cut to the desired length in a cutting device.

In Fig. 9, a facility is shown for manufacturing of the wooden profile 1, for example from three of the board- or panel-shaped lamellae 2, in which a length 65 of the wooden profile 1 is made in a determined facility length. The facility comprises several press modules 66 arranged in a row in the shown exemplary embodiment 3 in the direction of the length 65 of the wooden profile 1 to be manufactured, in which the lamellae 2 are pressed between a press support 67 and an adjustable press support 69 at their connection surfaces 70 which are glued by means of a clamping device 40, for example the knee lever mechanism 41 for applying a press force according to arrow 68.

The lamellae 2 are, as indicated in Fig. 9, in a roughly sawn embodiment, i.e. all surfaces including the connection surfaces 70 are in a raw state which is achieved in a cutting process, by which the lamellae 2 comprise differences in their thickness along the length of the wooden profile 1 and the surface roughness is much higher than that for such wooden profiles 1 according to the prior art of used planed or milled lamellae.

However, it is also possible prior to the connecting process and the application of the glue 70, to process the surfaces by a raw milling process or brushing process. Due to the processing in the roughly sawn or brushed or grounded state, waste, in contrast to common processing of planed lamellae 2, is significantly reduced. Moreover, by the increased surface roughness of the connecting surfaces 70, a higher strength of the glue connection by an interlocking effect at the connection surfaces 70 is achieved.

Due to the application of the microwaves of the microwave generators 13 during the press process on the one hand a veiy short curing time of the glue is achieved and on the other hand, due to the heating of the lamellae 2 up to about 1250 C, a fast curing of the glue and also a plasticity of the lamellae 2 is achieved.

As shown in Fig. 10, on a wooden profile 1 manufactured in the facility, a calibration of the wooden profile 1 and the smoothing out of differences in the thickness are achieved during the press process in the press unit 6 as well as in the press modules 66, and due to this, the manufactured wooden profile 1 comprises, after finishing the manufacturing process, a high dimension quality according to the predetermined dimensions of a height 71 and width 72.

Finally, it shall be noted that, for a better understanding of the structure of the facility, these or its parts are partly illustrated smaller and/or larger.

Reference signs 1 Wooden profile 2 Lamella 3 Press and transport device 4 Inlet side of 3 5 Outlet side of 3 6 Press unit 7 Traction means 8 Finger-jointing connection 9 Housing 10 Transport direction 11 Closing unit 12 Opening unit 13 Microwave generator 14 Double arrow 15 Adjustment drives 16 Inserting device 17 Outputting device 18 Double arrow 19 Temperature sensor 20 Temperature sensor 21 Temperature sensor 22 Driving control 23 Temperature control 24 Driving roll 25 Guiding roll 26 Supporting rolls 27 Stabilizing device 28 Traction means 29 Driving roll 30 Guiding roll 31 Traction rod 32 Supporting rolls 33 Lines 34 Carrier part 35 Base 36 First leg 37 Second leg 38 Attachment part 39 Chain 40 Clamping device 41 Knee lever mechanism 42 Press panel 43 Support panel 44 Spindle 45 Spindle nut 46 Opening 47 Opening 48 Centering pin 49 Centering opening 50 Supporting rolls 51 Supporting blocks 52 Facility frame 53 Base extension 54 Base extension 55 Rib 56 Rib 57 Piston-cylinder unit 58 Piston roll 59 Double arrow 60 Clamping device 61 Spring 62 Coupling device 63 Double arrow 64 Connection part 65 Length 66 Press module 67 Press support 68 Arrow 69 Press support 70 Connection area 71 Height 72 Width

Claims (2)

1. Method for producing a wooden profile (1), consisting of several layers of board or strip-shaped slats (2) glued together, comprising the following steps: to provide board-shaped or strip-shaped slats (2) with glue on their connecting surfaces (70); joining the slats (2) to a wooden profile (1); pressing and transporting the wood profile (1) in the longitudinal direction of the wood profile (1) in a pressing and transport device (3) until at least partially hardening of the glue, the pressing and transport device (3) in the longitudinal direction of the wood profile (1) comprising pressing units (6), which are arranged one after the other and which are connected to each other by means of rotating pulling means (7) and can be moved between an open position where they can release the wooden profile (1) and a closed position where they can press the wooden profile (1) together across its longitudinal direction; heating the wooden profile (1) with heating means (13); characterized in that the heating means (13) and the pressing units (6) are arranged so that the wooden profile (1) achieves a plastic state by means of the heat and the pressure; and the slats (2) at least on connecting surfaces (70) facing each other are formed raw sawn.