EP1950016A2 - Device for manufacturing a wooden profile and wooden profile made therewith - Google Patents

Abstract

The system has a pressing and transport device (3), in which plates (2) are pressed against each other for partial curing of glue and are simultaneously transported in a longitudinal direction of a wood profile (1). The device has pressing units (6) successively arranged in the longitudinal direction of the wood profile and connected with each other by a circumferential driving element (7). The pressing units are movable between an open position, in which it freely provides the wood profile, and a close position, in which it compresses the wood profile transverse to the longitudinal direction. An independent claim is also included for a method for manufacturing a wood profile.

Description

The invention relates to a system for producing a wooden profile of several layers of board or strip-like lamellae, with a pressing and transport device in which provided on their contact surfaces with glue, joined to said wood profile layers pressed until at least partial curing of the glue against each other and be transported simultaneously in the longitudinal direction of the wood profile.

However, the invention also relates to a wood profile of several layers of interconnected, in particular glued, board or strip-shaped lamellae and a method for producing a wooden layer consisting of several layers of lamellae.

There are already known devices and methods for producing multilayer components. For example, the patent application describes FR2502884 a device for producing long-length wood profiles of a dielectric material of abutting, glued together elements. The apparatus comprises a microwave tunnel oven of rectangular cross-section, operated at 2450 MHz or 434 MHz and moved either with the wood profile or fixed, in which latter case the wood profiles pass through the interior of the oven. The document shows, for example, the joining of a beam of individual boards, which are connected to each other by finger jointing, wherein the joints in the individual layers relative to the joints of adjacent layers along the beam are offset from each other. In the patent application FR2503015 describes a process for gluing rafters, in which the glue is cured by using microwaves. How the individual layers are fixed against each other until the adhesive has hardened is not clear from these two documents.

The patent application EP 103396 relates to a device for the simultaneous application of pressure and microwaves to curable units. It comprises a continuous press with two continuous, endless metal press belts, between which a clamping region is formed, wherein the press belts exert pressure on the hardenable units inserted between them. A pressing space is formed by the two band surfaces and by two side walls, and there are means for applying microwaves to the hardenable ones Units of at least one microwave generator act through a waveguide and an interface adjacent to the pressing space. In the patent application EP052359 is a continuous press for producing and / or coating, veneering or the like of a single or multi-layer panel web from a wood chips, wood fibers od. Like. Having nonwoven described. This device has an upper run of a lower and a lower run of an upper endless, at a predetermined speed circulating band of preferably steel. In this case, over the entire width of the pressing region extending, provided on an upper and lower abutment sliding coating is provided, over which the incoming belt slides with the aid of a pressurized and liquid lubricant. Despite the high cost involved in their production and operation, these belt presses can not achieve sufficiently high press forces for many layered products.

The invention is based on the object to propose a plant of the type mentioned, with which can be produced continuously with relatively little construction effort and relatively low energy consumption high quality wood profiles and to create a wood profile and method for its production while minimizing the use of raw materials.

The object is achieved according to the invention in that the pressing and transporting device comprises in the longitudinal direction of the wood profile successively arranged pressing units which are interconnected by rotating traction means and between an open position in which they release the wood profile and a closed position, in of which they compress the wood profile transversely to its longitudinal direction, are movable.

Particularly advantageous in this solution is that an endless production of the wood profile and the application of a large pressing force on the wood profile is achieved by the rotating press units, which is maintained during the passage of the wood profile through the plant to the curing of the glue. Due to the achievable high pressing forces milling or planing of the slats can be omitted and these can be processed in rough-sawn state, optionally brushed or ground. As a result, the cost of planing and in particular the associated loss of material can be saved so that economically producible and high-quality wood profiles can be achieved.

According to one embodiment of the invention, it is provided that each pressing unit has a U-shaped supporting part. Such a shape of the support member is particularly well suited to receive the wood profile during transport through the system and press. If the supporting part is attached to the traction means with its base, the wood profile can be easily inserted and removed after hardening of the glue.

According to another embodiment, each pressing unit has a spindle arrangement for adjusting the pressing width, so that the system is adaptable for the production of wood profiles of various widths.

According to a further embodiment, each pressing unit includes a clamping device with a movable, intended for contact with the wood profile press plate. This ensures a good and gentle clamping of the wood profile.

According to a further embodiment, close to an entry side for the wood profile, a closing unit for the clamping devices and near an exit side for the wood profile, an opening unit for the clamping devices is arranged, the system can be automated.

Another embodiment provides that the clamping device has a toggle mechanism. With such a mechanism can be achieved with relatively little construction effort considerable clamping forces. For clamping and releasing this mechanism, the closing unit and / or the opening unit is preferably designed as a lifting drive, for example as a piston-cylinder unit or as a spindle drive, so that these processes can be easily automated.

According to an alternative embodiment of the clamping device, this comprises an actuatable by a pressure medium piston-cylinder unit. This can be achieved, especially when using a liquid pressure medium, high forces. According to one embodiment, if the closing unit comprises coupling means for supplying a pressure medium to the piston-cylinder units and the opening unit discharging means for discharging the pressure medium from the piston-cylinder units, conditions for automatic operation of the plant are also created in this alternative.

A further embodiment provides that a stabilization device for protecting the supporting parts from undesired deformations is provided, which stabilizing device rests on each supporting part a tie rod connecting its leg. By this measure, the supporting parts of the press units can be dimensioned relatively space and material saving. If according to a preferred embodiment, the tension rods are arranged on further rotating traction means, the placement and removal of the tension rods is also automatable.

According to another embodiment of the invention, heating means for heating the wood profile and / or the glue are present, whereby the curing of the glue can be significantly accelerated, so that the transport speed of the system can be increased.

According to one embodiment, the system has at least one temperature sensor and means for regulating the temperature of the wood profile and / or the glue. In this way, the production time for the wood profile can be optimized without the risk of a loss of quality caused by overheating.

According to another embodiment, if the heating means comprise at least one device for generating microwaves, the wood profile or the glue is heated energy-saving.

In order not to jeopardize the safety of people working near the installation, according to one embodiment, a room in which the wood profile is supplied with microwaves is surrounded by a housing which has an infeed device and a removal device for the wood profile.

According to one embodiment, the infeed device and / or the discharge device has comb-like or brush-like arranged electrically conductive, flexurally elastic elements such as cords, wires, bands or lamellae. These elements yield elastically when a wood profile is being made, thus preventing microwaves from leaking through the gap between the housing and the wood profile.

According to further embodiments, a station for applying glue on the slats is provided, so that this preparatory step can be automated before joining the slats to the wood profile.

In order to improve the connection between the slats, in particular at the end faces thereof, it is provided according to a further embodiment that a device for producing fits, for example toothings, in particular finger jointing, is provided on the blanks.

Finally, one embodiment of the system according to the invention provides a device for cutting the wood profile into sections of the desired length.

However, the object of the invention is also achieved in that the lamellae forming the wood profile are sawn at least on mutually facing connecting surfaces, whereby on the one hand the strength property of the gluing is increased and on the other hand a not inconsiderable raw material and manufacturing cost savings are achieved.

It is advantageous if the lamellae forming the layers have approximately the same width, as a result of which a saving of material is likewise achieved and in the case of a final calibration following the production process, e.g. By milling, planing etc. manufacturing times can be saved.

It is possible that the layer is formed of at least one lamella extending over the length of the wood profile, whereby additional manufacturing steps are saved.

But it is also advantageous if the location of several extending in the direction of the length, lined up lamellae is formed, because this short goods can be used for the production of the wood profile.

It is advantageous if the lamellae are connected together at front ends.

An increase in the strength properties of the wood profile is achieved by a finger joint training for the front end connection of the lined up in the direction of their longitudinal extension slats.

According to the inventive method, as described in claim 26, an endless production of the wood profile and thus a raw material-saving production is advantageously achieved.

According to the method according to the invention as described in claim 27, a production of the wood profile is achieved in a predetermined length by a press length whereby production facilities are simple and therefore cost feasible.

The invention will be explained in more detail below with reference to the embodiments illustrated in the drawings.

Fig. 1

eine seitliche Schnitt-Ansicht einer Ausführungsart der Anlage;

Fig. 2

eine perspektivische Ansicht der Anlage nach Fig. 1 ohne Gehäuse;

Fig. 3

einen Querschnitt durch eine Presseinheit in der geöffneten Stellung vor dem Schließen;

Fig. 4

einen Querschnitt durch eine Presseinheit in der geschlossenen Stellung vor dem Öffnen;

Fig. 5

einen Querschnitt durch eine Presseinheit einer zweiten Ausführungsart der Vorrichtung;

Fig. 6

einen Querschnitt durch eine Presseinheit einer dritten Ausführungsart der Vorrichtung;

Fig. 7

einen Querschnitt durch eine Presseinheit einer vierten Ausführungsart der Vorrichtung und

Fig. 8

einen Querschnitt durch eine Presseinheit einer fünften Ausführungsart der Vorrichtung;

Fig. 9

die Anlage zur Herstellung des Holzprofils in vereinfachter Darstellung;

Fig. 10

das in der Anlage hergestellte Holzprofil in schematischer Darstellung.

Show it:

Fig. 1

a side sectional view of an embodiment of the system;

Fig. 2

a perspective view of the plant after Fig. 1 without housing;

Fig. 3

a cross section through a press unit in the open position before closing;

Fig. 4

a cross section through a press unit in the closed position before opening;

Fig. 5

a cross section through a pressing unit of a second embodiment of the device;

Fig. 6

a cross section through a pressing unit of a third embodiment of the device;

Fig. 7

a cross section through a press unit of 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 plant for the production of the timber profile in a simplified representation;

Fig. 10

the wood profile produced in the plant in a schematic representation.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to the new situation mutatis mutandis when a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

The embodiments described below relate to a system for producing glued, beam-shaped wood profiles, so-called laminated beams, from individual board-shaped slats. Such beams are sometimes referred to as laminated timber. However, the invention is not limited to beams or profiles made of wood. Rather, the lamellae may for example have the shape of rods, the wood profiles produced may be board-shaped and the processed material may be, for example, plastic, cork or in turn a coating material.

Fig. 1 shows a side, sectional view of a first embodiment of the system according to the invention. Fig. 2 shows the same embodiment of the system in perspective obliquely from above, wherein the enclosure enclosing housing 9 is omitted for better visibility of the individual components. The wood profile produced by the plant is indicated in the drawings with 1 and is moved in a direction indicated by arrows 10 transport direction from an inlet side 4 to an outlet side 5 through the system. The wooden profile 1 consists of individual lamellae 2, wherein in each case two in the transport direction 10 frontally adjacent lamella 2 are connected to each other by means of a finger joint 8.

A pressing and transporting device 3 for the timber section 1 forms an important component of the system. It has a plurality of press units 6 which are arranged one behind the other in the transport direction 10 and are interconnected by circulating traction means 7, which later on the hand FIGS. 3 to 7 be described in more detail. Each press unit 6 is capable of exerting on the wood profile 1 to be glued during transport through the plant a compression pressure of 40 to 50 N / cm ² . The press units 6 are tensioned by a closing unit 11 arranged close to the inlet side 4 and are relieved again by an opening unit 12 arranged close to the outlet side 5, so that the wooden profile 1 is released. The endless circulating traction means 7 may be formed as a band, chain, rope or the like. In the in Fig. 1 and Fig. 2 As shown, the traction means 7 are formed as two parallel juxtaposed belts, which are guided over a respective drive roller 24 and a guide roller 25 and to which the press units 6 are fixed at intervals. Between the drive rollers 24 and the guide rollers 25 support rollers 26 are arranged.

In Fig. 1 is over the pressing and transporting device 3, a stabilizing device 27 is arranged, which also has endless circulating traction means 28. The traction means 28 of the stabilizing device 27 are guided over a drive roller 29 and a deflection roller 30. The stabilizing device 27 serves to prevent unwanted deformation of the press units 6 while they compress the profile 1. For this purpose, tension rods 31 are arranged on the traction means 28, whose distances from each other correspond to the distances between the press units 6. The tie rods 31 are placed close to the inlet side 4 on the press units 6 before they are stretched and lifted after relaxing near the outlet side 5 again from the press units. The effect of the tie rods 31 will be described later in the description of FIGS. 3 and 4 to become even clearer. Support rollers 32 ensure that the tension rods 31 remain connected to the press units 6 as long as they exert pressure on the wood profile 1.

In order to accelerate the curing of the glue connecting the lamella 2, the plant is equipped with a heating device in the form of microwave generators 13 arranged one behind the other in the transporting direction 10. These are adjustable by adjusting drives 15 perpendicular to the transport direction 10, as indicated by the double arrow 14 in Fig. 1 is indicated. Due to the adjustability of the microwave generator 13 is an adaptation to different to be produced with the plant wood profiles 1 possible. The wooden profile 1 will open heated to 125 ° C, which reduces the setting time of the glue to a few minutes. Due to the heat and the pressure lignin leaves the wood, its strength decreases substantially and the deformability increases, so that one can speak of a plastic condition of the wood. Inaccuracies, in particular differences in thickness, which consist of elimination of a planing operation of the blanks, as well as distortions are compensated by plasticity in the press units 6.

In order to protect the people working with the system from microwaves, the area of the system in question is protected by a housing 9 completely enclosing this area, as shown particularly in FIG Fig. 1 is clearly visible. In the area of the inlet side 4 is a Einschleuseinrichtung 16 and in the region of the outlet side 5, a discharge device 17 for the wood profile 1 is arranged. The input and output devices 16 and 17 perform the function of microwave seals and are adjustable for the purpose of adaptation to the dimensions of the wood profile 1, as indicated by the double arrow 18 in Fig. 1 is indicated. This adjustability is not limited to the in Fig. 1 direction shown, but parts of the devices 16 and 17 are also in a direction perpendicular to the plane of the Fig. 1 adjustable. The infeed device 16 and the discharge device 17 have comb-like or brush-like arranged electrically conductive, flexurally elastic elements such as cords, wires, strips or slats.

So that the heating of the wood profile 1 can be precisely monitored and regulated, temperature sensors 19, 20 and 21 are arranged in the system, which preferably operate without contact. In the example according to Fig. 1 a first temperature sensor 19 in the region of the inlet side 4, a second temperature sensor 20 approximately in the middle of the system and a third temperature sensor 21 in the region of the outlet side 5, so that it is possible, caused by the microwave generator 13 temperature increase in profile 1 exactly be monitored and, if necessary, influenced.

In Fig. 1 schematically a drive control 22 for the motors of the drive rollers 24 and 29, not shown, as well as the adjusting drives 15 of the microwave generator 13 is shown. A temperature control 23 is provided for the operation of the microwave generator 13. Furthermore, lines 33 for the supply of system components and for signals between plant components and the drive control 22 or the temperature control 23 are exchanged, drawn.

Not shown in the figures, but also belonging to the system, located in the region of the inlet side 4 outside the housing 9, a glue applicator, with which before the joining of the blade 2 to the wood profile 1 glue is applied to the lamella. For this purpose, different known from the prior art methods are suitable, with which glue can be applied flat or in parallel strands. Such methods may be, for example, that the glue applied by roller brushes, sprayed from nozzles or pressed in strands of a perforated tube under pressure. Near the exit side 5 is located outside the housing 9, a cutting device, not shown, for cutting the wood profile 1 to the desired length. Between the discharge device 17 and the cutting device, a cooling section may be provided so that the heated profile can cool before cutting.

The FIGS. 3 to 7 show details and various embodiments of the press unit 6. In Fig. 3 a first embodiment of the pressing unit 6 is shown in the open position. A U-shaped support member 34 receives the blanks 2 assembled to the wood profile 1 such that they rest on the base 35 of the support member 34 between a first leg 36 of the support member and a pressing plate 42. The support member 34 is secured by means of fastening members 38 on the traction means, which is formed in this example as a chain 39. The pressing plate 42 is movable by a clamping device 40 in the direction of the first leg 36. The clamping unit 40 is formed in this example as a toggle mechanism 41 which is disposed between the pressing plate 42 and a bearing plate 43. The bearing plate 43 is supported by a spindle 44, which in turn is mounted in a recorded in the second leg 37 of the support member 34 spindle nut 45.

Before the pressing unit 6 is closed, a pull rod 31 connecting the first leg 36 and the second leg 37 of the support member 34 is placed, as described above in connection with Fig. 1 already mentioned. This pull rod 31 has the task of preventing the support member 34 is deformed under the force of the tensioning device 40, for example, in such a way that the first leg 36 and the second leg 37 are bent apart and / or the base 35 is bent. On the first leg 36 and the second leg 37 centering pins 48 are provided, which are present in the pull rod 31 Engage centering 49. For better absorption of the tensile forces that occur, the tension rod 31 can engage over the first leg 36 and the second leg 37 sideways.

To set up the system for a particular wooden profile 1, the clamping devices 40 must be adapted to the width of the wood profile 1 to be produced, such that the toggle mechanism 41 can be brought just above the dead center by applying a maximum pressing force. For this purpose, the spindle 44 is rotated until the pressing plate 41 abuts the wood profile 1, wherein the toggle mechanism 41, the in Fig. 3 shown position occupies.

To close the pressing unit 6, the clamping device 40 is actuated by the clamping unit 11. The latter is designed for example as a pneumatic or hydraulic piston-cylinder unit and pushes the toggle mechanism 41 of the in Fig. 3 presented in the in Fig. 4 shown position. The closing unit 11 engages briefly through an opening 46 which is provided for this purpose in the base 35 of the support member 34. Not shown stops prevent the toggle mechanism 41 on the in Fig. 4 shown position can be moved out. The pressing force is maintained by the elasticity of the wood profile 1. For narrow wooden profiles 1 and / or certain, less elastic materials may be provided to maintain the pressing force springs, such as disc springs (not shown), between the spindle 44 and the press plate 43 or between the spindle nut 45 and the second leg 37 of the support member 34th are arranged.

Fig. 4 shows the press unit 6 shortly before the opening of the toggle mechanism 41 through the opening unit 12, which engages for this purpose briefly by an opening provided in the pull rod 31 opening 47. Once the pressing unit 6 is relaxed, the tension rod 31 can be lifted so that the pressing unit 6 can be deflected to the drive roller 24 down, while the profile 1 is further transported by the discharge device 17.

The closing unit 11 and the opening unit 12 can be stored in the system so that their position is adjustable transversely to the transport direction 10 according to the adjustment of the spindle 44 so that their force acts as closely as possible on the knee joint when closing and when opening the toggle mechanism. When the pressing and transporting device 3 moves relatively slowly, it does not have to close and open the press units 6 be stopped. It merely has to be ensured that the openings 46 and 47 provided for the short-term passage of the closing unit 11 and the opening unit 12 are large enough. But it is also conceivable that the pressing and transporting device 3 is stopped for closing and opening the press units 6 for a short time. The distance between the closing unit 11 and the opening unit 12 in the transport direction 10 is a whole multiple of the distance between two pressing units, so that at the same time a pressing unit 5 located near the inlet side 4 is closed by the closing unit 11 and a pressing unit located close to the outlet side 5 5 can be opened by the opening unit 12.

Fig. 5 shows an alternative to the tie rod 31. In its place 34 support rollers 50 are provided for lateral support of the first leg 36 and the second leg 37 of the support member, which are received in bearing blocks 51, which in turn are fixedly attached to a system frame 52. Another alternative to the tie rod 31 is shown in FIG Fig. 6 shown. In order to prevent bending of the first and second legs 36, 37 and / or the base 35 of the support member 34, the base 35 is extended on both sides beyond the first and second legs 36, 37 by base extensions 53, 54. Between the first leg 36 and the base extension 53 at least one support rib 55 is arranged and between the second leg 37 and the base extension 54, two support ribs 56 are preferably arranged, namely one each side of the spindle nut 45. By these measures, an undesirable deformation of the support member 34th prevented under the occurring clamping forces.

Fig. 7 shows an alternative clamping device 60, which consists mainly of a arranged on the first leg 36 of the support member 34 piston-cylinder unit 57. The latter can be equipped either for pneumatic or preferably for hydraulic operation. Due to the higher achievable pressing force, the hydraulic design is preferred. The piston-cylinder unit 57 acts with its piston rod 58 in the direction of the double arrow 59 on the pressure plate 42. For the withdrawal of the piston rod, a spring 61 is provided in the piston-cylinder unit 57. To close the clamping device 60, the piston-cylinder unit 57 is supplied with hydraulic fluid via a coupling device 62 which is connectable in the direction of the double arrow 63 with a connection part 64. The connecting part 64 is equipped with a check valve, so that in the cylinder of the piston-cylinder unit built-up pressure is maintained when the coupling device 62 is released from the connection part 64. So that sufficient time is available for filling the piston-cylinder unit with pressurized fluid, the coupling device 62 can be designed such that it can be moved in the transport direction 10 and follows the pressing unit 6 over a partial path of the transport path until the desired pressure is built up. Alternatively, the pressing and transporting device 3 can be stopped until the desired pressure is reached in the piston-cylinder unit 57. To open the clamping device 60, a coupling device, not shown, is provided in the vicinity of the outlet side 5, which is able to open the check valve present in the connection part 64, so that the pressure fluid present in the piston-cylinder unit 57 under the effect of Spring 61 flows back into a liquid container and the piston rod 58 in Fig. 7 moved to the right. Means for adjusting the span of this press unit 6, as in the embodiments according to the FIGS. 3 to 6 have been described using the example of the spindle 44 are not necessary in this embodiment, because the stroke of the piston-cylinder unit 67 can be dimensioned so that wood profiles 1 minimum to maximum width can be stretched. In contrast to a toggle mechanism, the achievable force over the entire stroke is the same for a hydraulic or pneumatic piston-cylinder unit.

Fig. 8 shows a modification of the in the Fig. 3 to 6 In contrast to the press units described above, in the embodiment according to Fig. 8 the composite of the slats 2 profile 1 is not clamped between the pressure plate 42 and the first leg 36 of the support member 34, but between the pressure plate 42 and the bearing plate 43. As in the embodiments of the Fig. 3 to 6 For the purpose of adapting the press unit 6, the spindle 44 is connected to wood sections 1 of different widths with the bearing plate 43, but the toggle mechanism 41 is arranged between the press plate 42 and the first leg 36. This arrangement has the advantage that the toggle mechanism 41 regardless of the width of the wooden profile 1 maintains its lateral position with respect to the support member 34 and thus a lateral adjustability of the clamping unit 11 and the opening unit 12 is omitted.

All parts of the plant, in particular those of the press units, especially the parts that can come into contact with the wooden profile 1 and with the glue leaking, are made of stainless steel Steel executed. In principle, it is also possible to rotate the entire system by up to 90 °, so that the lamellae 2 forming the wooden profile 1 lie on the first leg 36 of the supporting part 34 and are pressed together by the clamping device 40 or 60 from above.

In the following, the operation of a system according to the invention will be described with reference to the example according to FIGS FIGS. 1 to 4 described.

The slats 2 are sawn and optionally brushed or sanded longitudinally or transversely or crosswise. A planing of the blanks is - as already mentioned - not required because minor bumps are compensated by the applied pressure in the press units 6 pressing forces. If the lamellae 2 are bent, in particular curved, it may be advisable to install in these relaxation cuts in order to reduce the required pressing force during sizing. Often, a single cut of about 0.2 mm width and a depth of about half the thickness of the slat 2 is sufficient. In the case of slats 2 with a width of 250 mm and more, several parallel expansion slices can also be applied. Preferably, the slats 2 are provided with a finger joint 8 at their end-side joints, where they are later in the wooden section 1 with adjacent longitudinally extending slats 2 in contact.

The slats 2 prepared in this way are provided with glue in a glue application device on those surfaces which later come into contact with adjacent slats 2 in the wood profile 1. Then, the slats 2 are joined together to form the wooden profile 1 and introduced by the Einschleuseinrichtung 16 in the system. When joining the slats 2 is to ensure that the joints or finger joints 8 are offset in adjacent layers against each other in the longitudinal direction of the wood profile 1 against each other. It is not necessary that all slats 2 are the same length. Also, not all slats 2 need to have the same thickness. It can wood profiles 1 with several layers of different thicknesses slats 2 are made, of course, the slats 2 are the same thickness in the same position. The assembly of the slats 2 takes place on a table or a roller conveyor whose surface is arranged at the same height as the bases 35 of the support members 34 of the press units 6.

Before a new wood profile 1 is produced, the clamping devices 40 of the overall width of the wood profile 1 must be adjusted by the spindles 44 are adjusted so far that the toggle mechanisms 41 can be just closed by the clamping unit 11. As a result, a maximum pressing force is achieved.

In the area of the deflection rollers 25 and 30, the wooden profile 1 comes to rest on the base 35 of a supporting part 34 of a pressing unit 11 moving in the transporting direction 10. Shortly after the pressing unit 6 has passed the deflection rollers 25 and 30, a tension rod 31 attached to the traction means 28 and moving at the same speed in the same direction (10) is placed on the supporting part 34. Thereafter, the press unit 6 comes in the region of the closing unit 11, which actuates the toggle lever mechanism 41, so that the wood profile 1 is compressed in the press unit 6. In the example below Fig. 1 the wood profile 1 is compressed at any time by seven in the transport direction 10 close to each other arranged press units 6.

On the way between the closing unit 11 and the opening unit 12, the wood profile 1 is passed under the microwave generators 13 and heated by them to about 125 ° C, the wood is approximately plastic and the blades 2 are pressed into close contact with each other. The temperature of the wood and / or glue is monitored by the temperature sensors 19 to 21 and influenced by the temperature control 23 according to a stored specification. For heating the wood profile 1 frequencies of 950 MHz or 2450 MHz are preferably used, these frequencies are selectively applied individually, alternately or simultaneously. Depending on the temperature profile, the profile can be acted upon with the frequencies mentioned continuously or clocked. The heating of the wood profile 1 is matched with the transport speed, such that the glue is cured before passing through the discharge device 17.

After passing through the discharge device 17, the wood profile 1 again reaches a table or a roller conveyor, where it cools down a bit. Subsequently, the wood profile 1 is cut to the desired length in a cutting device.

In the Fig. 9 is a plant for the production of the timber profile 1, for example, three of the board or strip-shaped slats 2 shown in which a length 65 of the wood profile 1 in a for designed plant length is manufactured. The plant consists of several, in the illustrated embodiment 3 stationary in the direction of the length 65 of the wood profile to be produced 1 juxtaposed press modules 66 in which the slats 2 between a fixed press block 67 and a means of the clamping device 40, for example, the toggle mechanism 41, for Application of a pressing force - according to arrow 68 - adjustable press block 69 at their abutting each other, and provided with a glue, connecting surfaces 70 are pressed.

The slats 2 are, as in the Fig. 9 indicated, in sawnauer execution, that is, that all surfaces including the connecting surfaces 70 are achievable in a sawing raw state, whereby the lamellae 2 in the course of the length of the wood profile 1 thickness variations and the surface roughness is substantially greater than in the state of Technique for such wood profiles 1 used planed or milled slats.

However, it is also possible to process the surfaces at least by a rough grinding or brushing process prior to the bonding process and the glue application 70. By processing in sawn or brushed or ground state, the waste is significantly reduced compared to the conventional processing of planed slats 2. Furthermore, the increased surface roughness of the connection surfaces 70 results in a higher strength of the glue connection due to a toothing effect on the connection surfaces 70.

By the action of the microwave radiation of the microwave generator 13 during the pressing process, on the one hand a very short curing time of the glue and on the other hand by the proposed heating of the slats 2 to about 125 ° C, a rapid curing of the glue but also a plasticity of the slats 2 is achieved.

This will be like now Fig. 10 to take on a manufactured in the plant wood profile 1 during the pressing process in the press unit 6 as well as in the press modules 66 calibration of the wood profile 1 and compensation for thickness variations achieved and thus has the wood profile 1 thus produced after finishing the manufacturing process a high dimensional quality according to provided dimensions of a height 71 and a width 72.

The embodiments show possible embodiments of the system, which should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action by representational Invention in the skill of those skilled in this technical field. So are all conceivable embodiments, which are possible by combinations of individual details of the illustrated and described embodiment variant, includes the scope of protection.

For the sake of order, it should finally be pointed out that for a better understanding of the design of the system, these or their components have been shown partly unevenly and / or enlarged and / or reduced in size.

REFERENCE NUMBERS

1 wood profile 36 first leg 2 lamella 37 second leg 3 Pressing and transporting device 38 attachment portion 4 Entrance side of 3 39 Chain 5 Exit side of 3 40 tensioning device 6 press unit 41 Toggle mechanism 7 traction means 42 press plate 8th Dovetail teeth 43 bearing plate 9 casing 44 spindle 10 transport direction 45 spindle nut 11 closing unit 46 opening 12 opening unit 47 opening 13 microwave generator 48 spigot 14 double arrow 49 centering 15 adjusting drives 50 support rollers 16 Einschleuseinrichtung 51 bearing blocks 17 discharge device 52 plant stand 18 double arrow 53 base extension 19 temperature sensor 54 base extension 20 temperature sensor 55 rib 21 temperature sensor 56 rib 22 drive control 57 Piston-cylinder unit 23 temperature control 58 piston rod 24 capstan 59 double arrow 25 idler pulley 60 tensioning device 26 support rollers 61 feather 27 stabilizing device 62 coupling device 28 traction means 63 double arrow 29 capstan 64 connector 30 idler pulley 65 length 31 Tension rods 66 press module 32 support rollers 67 Press Bock 33 cables 68 arrow 34 supporting part 69 Press Bock 35 Base 70 connecting area 71 height 72 width

Claims (27)

Plant for producing a wooden profile (1) from board or strip-shaped lamellae (2), with a pressing and transporting device (3) in which the lamellae (2) joined together at their contact surfaces with said wood profile (1) up to at least partial curing of the glue pressed against each other and transported simultaneously in the longitudinal direction of the wood profile (1), characterized in that the pressing and transporting device (3) in the longitudinal direction of the wood profile (1) successively arranged pressing units (6) comprises by circulating traction means (7) are interconnected and between an open position in which they release the wooden profile (1) and a closed position in which they compress the wood profile (1) transversely to its longitudinal direction, are movable. Installation according to claim 1, characterized in that each pressing unit (6) has a U-shaped support member (34). Installation according to claim 2, characterized in that the supporting part (34) is fastened with its base (35) to the traction means (7). Installation according to one of the preceding claims, characterized in that each pressing unit (6) has a spindle arrangement (44, 45) for adjusting the pressing width. Installation according to one of the preceding claims, characterized in that each pressing unit (6) comprises a clamping device (40; 60) with a movable pressing plate (42) intended for contact with the wooden profile (1). Installation according to claim 5, characterized in that close to an entry side (4) for the wood profile (1) a closing unit (11) for the clamping devices (40; 60) and near an exit side (5) for the wood profile ( 1) an opening unit (12) for the clamping devices (40; 60) is arranged. Installation according to one of claims 5 to 6, characterized in that the clamping device (40) has a toggle mechanism (41). Installation according to claim 7, characterized in that the closing unit (11) and / or the opening unit (12) is designed as a lifting drive, for example as a piston-cylinder unit or as a spindle drive. Plant according to claim 6, characterized in that the tensioning device (60) comprises a piston-cylinder unit (57) which can be actuated by a pressure medium. Installation according to claim 9, characterized in that the closing unit comprises coupling means (62) for the supply of a pressure medium to the piston-cylinder units (57) and the opening unit discharge means for discharging the pressure medium from the piston-cylinder units (57). Installation according to one of claims 2 to 10, characterized in that a stabilization device (27) for protecting the supporting parts (34) from undesired deformations is provided, which stabilizing device (27) on each support part of the leg (36, 37) connecting tie rod (27). 31). Installation according to claim 11, characterized in that the tension rods (31) are arranged on further circulating traction means (28). Installation according to one of the preceding claims, characterized in that heating means (13) for heating the wood profile (1) and / or the glue are present. Installation according to claim 13, characterized in that it comprises at least one temperature sensor (19, 20, 21) and means (21) for controlling the temperature of the wood profile (1) and / or the glue. Installation according to one of claims 13 to 14, characterized in that the heating means comprise at least one device (13) for generating microwaves. Installation according to claim 15, characterized in that a space in which the wood profile (1) is acted upon by microwaves, surrounded by a housing (9) having a Einschleuseinrichtung (16) and a discharge device (17) for the wood profile (1 ) having. Plant according to claim 16, characterized in that the infeed device (16) and / or the discharge device (17) has comb-like or brush-like arranged electrically conductive, flexurally elastic elements such as cords, wires, strips or lamellae (2). Installation according to one of the preceding claims, characterized in that a station for applying glue to the lamella (2) is provided. Installation according to one of the preceding claims, characterized in that a device for generating fits, such as teeth, in particular finger jointing teeth on the slats (2) is provided. Installation according to one of the preceding claims, characterized in that a device for cutting the wood profile (1) is present in sections of the desired length. Wood profile (1) of several layers of interconnected, in particular glued, board or strip-shaped lamellae (2), characterized in that the lamellae (2) are formed sawn at least at facing each other connecting surfaces (70). Wood profile (1) according to claim 21, characterized in that the lamellae (2) forming the layers have approximately the same width. Wood profile (1) according to claim 21 or 22, characterized in that the layer of at least one over a length (65) of the wood profile (1) extending lamella (2) is formed. Wood profile (1) according to claim 21 or 22, characterized in that the layer of several in the direction of the length (65) of the wood profile (1) at front ends juxtaposed, preferably by gluing together interconnected slats (2) is formed. Wood profile (1) according to claim 24, characterized in that a connection region, as known per se, formed by at the ends of the slats (2), provided counter-trained finger joints. Method for producing a wooden profile (1) consisting of several layers of board-shaped or strip-shaped lamellae (1) according to one of Claims 21 to 25, characterized in that the wooden profile (1) consists of the lamellas (2) in an installation according to one of the claims Claims 1 to 20 is formed. Method for producing a wooden profile (1) consisting of several layers of board or strip-shaped lamellae (2) according to one of Claims 21 to 25, characterized in that the wooden profile (1) consists of the lamellas (2) in a lengthwise direction (65) of the wood profile (1) extending pressing unit (6) from one another in the direction of the length (65), independently of each other via clamping devices (40) for applying a pressing force on the slats (2), fixed press modules (66), and below Microwave action of at least one microwave generator (13) for curing an adhesive layer interconnecting the laminations (2) are pressed together.

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