METHOD FOR PRODUCING A RECTANGULAR WOODEN PANEL FROM INDIVIDUAL BOARDS AND WOODEN PANEL MANUFACTURING DEVICE

Abstract

A system and method for producing a rectangular wooden panel with boards extending diagonally at an angle (), where each of the boards has opposite longitudinal sides and transverse sides includes a trimming device for trimming the transverse sides of the boards at an angle (90). The trimmed boards are transported to a position in front a joining station, and the boards are arranged at angle () in relation to a direction of displacement. The boards are then glued on at least the longitudinal side facing a board already located in the joining station, and then inserted into the joining station with a displacement device that includes a plurality of towing trolleys arranged on a coupling bar. The displacement device travels a displacement path in the displacement direction that runs parallel to the orientation of the transverse sides of the boards. The inserted board is pressed and glued to the board already in the joining station. These steps are repeated until a wooden panel of the desired size is achieved. Then, a triangular gusset is made with a cut running perpendicular to the transverse sides at one end of the wooden panel to produce a first right-angled side edge, and this cut-off gusset is then glued at the opposite end of the wooden panel such that a second right-angled side edge is produced. The system includes a controller which controls the cutting, gluing, pressing, joining, and displacement operations.

Claims

1. A method for producing a rectangular wooden panel with a plurality of boards extending diagonally at an angle (), each board of the plurality of boards has opposite longitudinal sides and transverse sides, comprising: a) trimming the transverse sides of each of the boards of the plurality of boards at a first trim angle (90) to produced trimmed boards, b) transporting a trimmed board to a position in front of a joining station and arranging the trimmed board at angle () in relation to a direction of displacement, c) glueing the trimmed board on at least one longitudinal side facing a second board already located in the joining station, d) inserting the trimmed board into the joining station with a displacement device, wherein e) the displacement device comprises a plurality of towing trolleys that are arranged on a coupling bar which travels a displacement path in the displacement direction, wherein the displacement path runs parallel to an orientation of the transverse sides of the trimmed board, f) pressing and glueing the inserted trimmed board to the second board already in the joining station, g) repeating steps b) to f) until a wooden panel of a certain size is achieved, h) cutting off a triangular gusset with a cut running perpendicular to the transverse sides of the plurality of boards at one end of the wooden panel to produce a first right-angled side edge, and i) glueing on a cut-off gusset at an opposite end of the wooden panel such that a second right-angled side edge is produced.

2. The method according to claim 1, wherein the triangular gusset is cut off at a front end of the wooden panel viewed in the direction of displacement.

3. The method according to claim 1 further comprising the following steps: j) producing a second wooden panel according to steps a) to i), k) glueing an upper side of at least one of the wooden panel and the second wood panel, l) turning the second wooden panel about a longitudinal axis of the second wooden panel, m) laying the second wooden panel on an upper side of the wooden panel so that the plurality of boards of the wooden panel and the plurality of boards of the second wooden panel cross, and n) pressing the wooden panel and the second wooden panel to produce a cross-laminated timber panel.

4. The method according to claim 1 further comprising the following: j) dividing the wooden panel along a vertical axis of the wooden panel into a first partial panel and a second partial panel, k) glueing an upper side of at least one of the first partial panel an the second partial panel, l) turning the second partial panel about the vertical axis (H.sub.10), m) laying the second partial panel on an upper side of the first partial panel so that the plurality of boards of the first partial panel and the second partial panel cross, and n) pressing the first partial panel and the second partial panel to produce a cross-laminated timber panel.

5. The method according to claim 1 wherein in step c) a hot-melt adhesive is applied to the at least one longitudinal side.

6. The method according to claim 3 wherein the wooden panel and the second wooden panel are glued with a hot-melt adhesive.

7. The method according to claim 4 wherein the first partial panel and the second partial panel are glued with a hot-melt adhesive.

8. The method according to claim 1 further comprising inserting a fiberboard between two adjacent boards of the plurality of boards and glueing the fiberboard to each of the two adjacent boards, and producing a wooden panel with fiberboards.

9. The method according to claim 8, wherein the fiberboard is wider than each of the plurality of boards.

10. The method according to claim 7 further comprising i inserting the wooden panel with fiberboards between two wooden panels without fiberboards; and gluing and pressing together the wooden panel with fiberboards and the two wooden panels without fiberboards.

11. A wooden panel manufacturing device for manufacturing a rectangular wooden panel, comprising: (a) a trim device configured to trim transverse sides of each of a plurality of boards at a trim angle (90), (b) a feed device configured to transport a trimmed board to a position in front of a joining station and arranging the trimmed board at angle () in relation to a direction of displacement, (c) a glueing station configured to glue the trimmed board on at least a longitudinal side facing a second board already located in the joining station, (d) a displacement device configured to insert the trimmed board into the joining station, (e) wherein the displacement device comprises a plurality of towing trolleys that are arranged on a coupling bar which travels a displacement path(s) in the displacement direction, wherein the displacement path runs parallel to an orientation of the transverse sides of the plurality of boards, (f) wherein the joining station is configured to press and glue an inserted board to a second board already in the joining station, (g) a cut-off device configured to cut off a triangular gusset with a cut running perpendicular to the transverse sides of the plurality of boards at one end of a wooden panel to produce a first right-angled side edge, and (h) wherein the joining station is configured to press and glue the cut-off gusset to an opposite end of the wooden panel such that a second right-angled side edge is produced.

12. The wooden panel manufacturing device according to claim 11, further comprising a control device configured to control the trim device, the feed device, the displacement device, the glueing station, the joining station, and the cut-off device, so that the wooden panel manufacturing device automatically carries out a method for producing a rectangular wooden panel with a plurality of boards extending diagonally at an angle (), each board of the plurality of boards has opposite longitudinal sides and transverse sides, comprising: a) trimming the transverse sides of each of the boards of the plurality of boards at a first trim angle (90) to produced trimmed boards, b) transporting a trimmed board to a position in front of a joining station and arranging the trimmed board at angle () in relation to a direction of displacement, c) glueing the trimmed board on at least one longitudinal side facing a second board already located in the joining station, d) inserting the trimmed board into the joining station with a displacement device, wherein e) the displacement device comprises a plurality of towing trolleys that are arranged on a coupling bar which travels a displacement path in the displacement direction, wherein the displacement path runs parallel to an orientation of the transverse sides of the trimmed board, f) pressing and glueing the inserted trimmed board to the second board already in the joining station, g) repeating steps b) to f) until a wooden panel of a certain size is achieved, h) cutting off a triangular gusset with a cut running perpendicular to the transverse sides of the plurality of boards at one end of the wooden panel to produce a first right-angled side edge, and i) glueing on a cut-off gusset at an opposite end of the wooden panel such that a second right-angled side edge is produced.

13. The wooden panel manufacturing device according to claim 10 wherein the feed device is configured to transport the cut-off gusset in a feed direction to a position in front of a last board already located in the joining station.

14. The wooden panel manufacturing device according to claim 10 further comprising: (a) a handling device configured to move the cut-off gusset into the glueing station, and (b) wherein the glueing station is configured to glue the cut-off gusset on at least a longitudinal side facing the second board already located in the joining station.

15. The wooden panel manufacturing device according to claim 10 wherein the towing trolleys each have a rear towing arm in the direction of displacement (R.sub.S) and a front towing arm in the direction of displacement (R.sub.S), wherein the rear towing arms and the front towing arms are configured to be brought into an engaged position and into a disengaged position, wherein the rear towing arms are arranged parallel to each other at right angles to the direction of displacement and the front towing arms are arranged diagonally at an angle ().

Description

DESCRIPTION OF THE DRAWINGS

[0053] In the following, the invention will be explained in more detail with the aid of accompanying figures. They show:

[0054] FIG. 1athe schematic representation of laying individual boards in a joining station;

[0055] FIG. 1bthe schematic representation of laying individual boards with a schematically illustrated operating station;

[0056] FIG. 1cthe cut along the line Ic-Ic according to FIG. 1b;

[0057] FIG. 2aa laid wooden panel with a parallelogram surface;

[0058] FIG. 2ba laid wooden panel with fiberboards in between and a parallelogram surface;

[0059] FIGS. 3a-3bthe wooden panel according to FIG. 2a after having obtained a rectangular surface; and

[0060] FIGS. 4a-4ca further wooden board.

DESCRIPTION

[0061] To ensure that the wooden panels 10, 20 with boards extending diagonally at an angle can be produced in a conventional joining station F, the boards 1, 2, 3, . . . x must first be trimmed on their opposite longitudinal sides 1.1, 1.2, 2.1, 2.2, 3.1, 3.2, . . . x.1, x.2 at an angle 90.

[0062] The boards 1, 2, 3, . . . , x1, x are then transported into the joining station F, where they are positioned at an angle in relation to the direction of displacement R.sub.S. They are transported via a feed device 32, which can be designed, for example, as a conveyor belt or roller conveyor. A plurality of towing trolleys 30.1, 30.2, 30.3, 30.4, 30.5, 30.6, 30.7 are arranged in front of the joining station F, said towing trolleys also being at an angle in relation to the direction of displacement R.sub.S. Each towing trolley 30.1, 30.2, 30.3, 30.4, 30.5, 30.6, 30.7 is fixed to the coupling bar 3.1 and can be displaced parallel to the direction of displacement R.sub.S via said bar in order to travel a path of displacement s. The path of displacement s also extends parallel to the orientation of the transverse sides 1.3, 1.4, 2.3, 2.4, 3.3, 3.4, . . . x.3, x.4, as shown in FIGS. 1a and 1b. Perpendicular to the direction of displacement s, the joining station F is limited by an adjustable ruler 33 and a fixed ruler 34 to allow for different lengths of the boards. The boards 1, 2, 3, . . . x rest on the sliding table 36 and are fixed to it via a pressure bar 35 (cf. FIG. 1c). The coupling bar 31 can be driven, for example, via a motor, hydraulically or pneumatically. As shown in FIGS. 1a and 1b, the towing trolleys 30.1, 30.2, . . . , 30.7 can be of different lengths to take the boards 1, 2, 3, . . . x extending diagonally at angle into account.

[0063] A first board 1 is initially arranged in front of the joining station F and then guided via the feed device 32 to the towing trolleys 30.1, 30.2, 30.3, 30.4, 30.5, 30.6, 30.7, which simultaneously insert it into the joining station F in the direction of displacement R.sub.S. In the process, the towing trolleys 30.1, 30.2, 30.3, 30.4, 30.5, 30.6, 30.7 all travel the same displacement path s until the first board 1 has reached the end position, formed by an end stop A. A second board 2 is then positioned in front of the joining station F and, at the glueing station 40, coated with a molten hot-melt adhesive on its front longitudinal side 2.1 in relation to the direction of displacement R.sub.S; it is then fed via the feed device 32 and inserted into the joining station F by means of the displacement device 30 until it strikes the rear longitudinal side 1.2 of the first board 1. The hot-melt adhesive cures quickly in the process, especially because the first board 1 is significantly colder than the hot-melt adhesive. These processes are repeated until the final board x has been inserted into the joining station F and a wooden panel 10 of the desired size has been produced.

[0064] As depicted in FIG. 2A, this wooden panel 10 has a parallelogram surface. The wooden panel 10 is transported out of the joining station F and now a gusset 10.1 is cut off at the front end, viewed in the direction of displacement R.sub.S, by means of a cut-off device 60, for example in the form of a saw, in particular a circular saw, by performing a vertical saw cut S in relation to the direction of displacement R.sub.S or to the transverse sides 1.3, 1.4; 2.3, 2.4; 3.3, 3.; . . . x.3, x.4. Said triangular gusset 10.1 is glued to the rear end of the wooden panel 10 by coating the front longitudinal side 1.1 in relation to the direction of displacement R.sub.S with a molten hot-melt adhesive, but preferably with a wood glue so as to improve its static properties, and glueing it to the longitudinal side x.2 of the last board x.

[0065] In order to produce a cross-laminated timber panel, a second wooden panel 20 is produced in the previously described manner. At least one upper side of the wooden panels 10, 20 is then glued with a wood glue. The second wooden panel 20 is turned 180 about its longitudinal axis and then placed with its upper side on the upper side of the first wooden panel 10, so that the boards 1, 2, 3, . . . x of the two wooden panels 10, 20 cross; the two wooden panels 10, 20 are then pressed to form a cross-laminated timber panel.

[0066] If the joining station F is long enough, a cross-laminated timber panel can also be produced from a single wooden panel 10 by dividing the rectangular wooden panel 10 along its vertical axis H.sub.10 into two partial panels 101, 102 (See FIGS. 3a-3b). The upper side of at least one partial panel 101, 102 is coated with wood glue; the second partial panel 102 is then folded 180 about the vertical axis H.sub.10 so that its upper side comes to rest on the upper side of the first partial panel 101 and the two partial panels 101, 102 are then pressed together.

[0067] The two methods described above enable the production of cross-laminated timber panels of any thickness. One just has to always ensure that the boards of adjacent wooden panels cross.

[0068] The towing trolleys 30.1, 30.2, . . . 30.7 each have a first towing arm 30.11, . . . 30.71 at the rear in the direction of displacement and a towing arm 30.12, . . . 30.72 at the front in the direction of displacement. The towing arms 30.11, . . . 30.71; 30.12, . . . 30.72 can be raised and lowered. To be able to insert the boards 1, 2, . . . x in the direction of displacement R.sub.S, the front towing arms 30.12, . . . 30.62, 30.72 are raised. They then grip the rear longitudinal side 1.2, 2.2, . . . x.2 in the direction of displacement R.sub.S in order to insert the boards 1, 2, 3, . . . x into the joining station F. In this case, the rear towing arms 30.11, . . . 30.61, 30.71 are lowered (cf. FIG. 1c). As shown in FIG. 1a, the front towing arms 30.12, . . . 30.72 are arranged diagonally at an angle when viewed from above. The rear towing arms 30.11, . . . 30.71 are arranged, when viewed from above, parallel at a right angle to the direction of displacement R.sub.S. They serve to attach the gusset 10.1 cut off at the front end of the wooden panel 10 to the rear end. For this purpose, the rear towing arms 30.11, . . . 30.71 are raised and the front towing arms 30.12, . . . 30.72 lowered. The cut-off gusset 10.1 can be moved via a handling device 80. For example, a vacuum cup may be provided that raises the cut-off gusset 10.1 and transfers it into the glueing station 40 where it is lowered. Here, the front side edge 1.1 of the board 1 is glued and the gusset 10.1 moved via the feed device 32 in the feed direction R.sub.Z to in front of the last board x. The gusset 10.1 is then pushed against the last board x in the direction of displacement R.sub.S via the towing arms 30.11, . . . 30.71 and pressed together with it.

[0069] A control device 70 (see FIG. 1b) is configured to control a trim device 50, the feed device 32, the displacement device 30, the glueing station 40, the joining station F, and the cut-off device 60, so that the wooden panel manufacturing device automatically performs the process according to the invention.

[0070] As shown in FIG. 2b, a fiberboard 0 can be inserted between each board 1, 2, 3, 4 . . . x1, which can be designed to be wider than the boards 1, 2, 3, . . . x (see also FIGS. 4a-4c) The connection between the boards 1, 2, 3, . . . x and the fiberboard is achieved in exactly the same way as the connection between the boards 1, 2 . . . described above. The front longitudinal side 0.1 of a fiberboard 0 in the direction of displacement R.sub.S is coated with a hot-melt adhesive and pushed against the rear side edge 1.2 of a board 1 already arranged in the joining station F. Boards and fiberboards are always glued together alternately. A board 1, x is provided at the beginning and end to create a solid end to the panel. One or several such panels can be used as an insulating panel in the middle layer of a cross-laminated timber panel. The two deck sides are formed from a pure wooden panel 10, 20, 101, 102 consisting only of boards 1, 2, 3, . . . x.

[0071] If the joining station F is long enough, a wooden panel 10 that has fiberboards 0 can also be divided along it vertical axis H.sub.10 into two partial panels and used twice accordingly.

REFERENCE LIST

[0072] 0 fiberboard [0073] 0.1 longitudinal side [0074] 1 board [0075] 1.1 longitudinal side [0076] 1.2 longitudinal side [0077] 1.3 transverse side [0078] 1.4 transverse side [0079] 2 board [0080] 2.1 longitudinal side [0081] 2.2 longitudinal side [0082] 2.3 transverse side [0083] 2.4 transverse side [0084] 3 board [0085] 3.1 longitudinal side [0086] 3.2 longitudinal side [0087] 3.3 transverse side [0088] 3.4 transverse side [0089] 4 board [0090] 4.1 longitudinal side [0091] 4.2 longitudinal side [0092] 4.3 transverse side [0093] 4.4 transverse side [0094] 5 board . . . [0095] x1 board [0096] x board [0097] x.1 longitudinal side [0098] x.2 longitudinal side [0099] x.3 transverse side [0100] x.4 transverse side [0101] 10 wooden panel [0102] 10.1 gusset [0103] 20 wooden panel [0104] 30 displacement device [0105] 30.1 towing trolley [0106] 30.2 towing trolley [0107] 30.3 towing trolley [0108] 30.4 towing trolley [0109] 30.5 towing trolley [0110] 30.6 towing trolley [0111] 30.7 towing trolley [0112] 30.11 towing arm [0113] 30.12 towing arm [0114] 30.61 towing arm [0115] 30.62 towing arm [0116] 30.71 towing arm [0117] 30.72 towing arm [0118] 31 coupling bar [0119] 32 feed device [0120] 33 adjustable ruler [0121] 34 fixed ruler [0122] 35 pressure bar [0123] 36 sliding table [0124] 40 glueing station [0125] 50 trim device [0126] 60 cut-off device [0127] 70 control device [0128] 80 handling device [0129] 101 partial panels [0130] 102 partial panels [0131] A end stop [0132] F joining station [0133] H.sub.10 vertical axis [0134] L longitudinal axis [0135] R.sub.S direction of displacement [0136] R.sub.Z feed direction [0137] S saw cut [0138] s path of displacement [0139] angle