The disclosure relates to a semi product for building panels or structural elements comprising several wood lamellas (5) fixed by distance elements (4), a building panel with such a semi product and a method of producing the semi product and the building panel.
대표청구항▼
1. A building panel comprising a wood lamella core, a decorative surface layer on top of the core and balancing layer under the core, the core comprising several wood lamellas, which are stacked essentially parallel to each other in a stack, so that each of the wood lamellas in the stack extends in
1. A building panel comprising a wood lamella core, a decorative surface layer on top of the core and balancing layer under the core, the core comprising several wood lamellas, which are stacked essentially parallel to each other in a stack, so that each of the wood lamellas in the stack extends in the same direction, and with long edge to long edge, and a long edge of a first wood lamella is arranged with a distance to a long edge of an adjacent second wood lamella in the stack, wherein the long edge of the first wood lamella is fixed by at least two distance elements to the long edge of the adjacent second wood lamella and at a first edge of the building panel, andwherein a first mechanical locking device is formed at the first edge of the building panel and at least partly in at least one of the distance elements. 2. The building panel as claimed in claim 1, wherein the long edge of the first wood lamella is fixed by a second distance element of the at least two distance elements to the long edge of the adjacent second wood lamella and at a second opposite edge of the building panel, wherein a first distance element of the at least two distance elements and the second distance element are arranged at a distance from each other. 3. The building panel as claimed in claim 2, wherein a part of the first distance element is positioned in a first groove in the first wood lamella, and a part of the second distance element is positioned in a second groove in the first wood lamella. 4. The building panel as claimed in claim 3, wherein another part of the first distance element and the second distance element are positioned in a third and a fourth groove, respectively, in the second wood lamella. 5. The building panel as claimed in claim 2, wherein a second mechanical locking device is formed at the second opposite edge of the building panel and at least partly in the second distance element. 6. The building panel as claimed in claim 5, wherein the first mechanical locking device is configured to cooperate with the second mechanical locking device at an essentially identical building panel for vertical and/or horizontal locking of the building panel and the essentially identical building panel. 7. The building panel as claimed in claim 6, wherein the first mechanical locking device comprises a protruding strip with a locking element and the second mechanical locking device comprises a locking groove at the second adjacent edge, wherein the locking element and the locking groove are configured to cooperate for the locking in the horizontal direction. 8. The building panel as claimed in claim 6, wherein one of the first or the second mechanical locking device comprises a tongue and the other of the first or the second mechanical locking device comprises a tongue groove, wherein the tongue and the tongue groove are configured to cooperate for the locking in the vertical direction. 9. The building panel as claimed in claim 5, wherein the second mechanical locking device comprises a locking groove at the second opposite edge of the building panel. 10. The building panel as claimed in claim 1, wherein at least one of the distance elements extends to a second opposite edge of the building panel, wherein a second mechanical locking device is formed at the second opposite edge of the building panel and at least partly in the at least one distance element. 11. The building panel as claimed in claim 1, wherein the first mechanical locking device comprises a protruding strip with a locking element. 12. The building panel as claimed in claim 1, wherein the at least two distance elements are of a different material or of different properties than the wood lamellas. 13. The building panel as claimed in claim 1, wherein at least one of the distance elements extends to an opposite long edge of the first wood lamella. 14. A semi-product for a structural element or for a core for a building panel, the semi product comprising several wood lamellas, which are stacked essentially parallel to each other in a stack, so that each of the wood lamellas in the stack extends in the same direction, and with long edge to long edge, a long edge of a first wood lamella is arranged with a distance to a long edge of an adjacent second wood lamella in the stack, and the long edge of the first wood lamella is fixed by at least two distance elements to the long edge of the adjacent second wood lamella, wherein at least one of the distance elements is positioned at a short edge of the first and the second wood lamella. 15. The semi-product according to claim 14, wherein the distance elements comprise wood fibres and are fixed to the first wood lamella and the adjacent second wood lamella by adhesive. 16. The semi-product as claimed in claim 14, wherein the distance between the long edge of the first wood lamella and the long edge of the adjacent second wood lamella in the core for the building panel is in the range of about 0.5 mm to about 15 mm. 17. The semi-product as claimed in claim 14, wherein the first or the second wood lamella comprises, in its length direction, two pieces spaced from each other by a space at short edges of said pieces. 18. The semi-product as claimed in claim 17, wherein an enforcement element is arranged at the space or at a knot or other weakness of the first or the second wood lamella. 19. The semi-product as claimed in claim 14, wherein an outer long edge of an outermost wood lamella is provided with distance elements. 20. The semi-product as claimed in claim 14, wherein a part of at least one of the distance elements is positioned in a groove in the first wood lamella. 21. The semi-product as claimed in claim 20, wherein another part of the at least one distance element is positioned in another groove in the second wood lamella. 22. The semi-product according to claim 14, wherein at least one of the distance elements extends to an opposite long edge of the first wood lamella. 23. A semi-product for a structural element or for a core for a building panel, the semi product comprising several wood lamellas, which are stacked essentially parallel to each other in a stack, so that each of the wood lamellas in the stack extends in the same direction, and with long edge to long edge, a long edge of a first wood lamella is arranged with a distance to a long edge of an adjacent second wood lamella in the stack, and the long edge of the first wood lamella is fixed by at least two distance elements to the long edge of the adjacent second wood lamella, wherein a third wood lamella is fixed to the second wood lamella by a third distance element, a fourth wood lamella is fixed to the third wood lamella by a fourth distance element, wherein one of the at least two distance elements, the third distance element and the fourth distance element are arranged in a straight line. 24. The semi-product as claimed in claim 23, wherein the straight line is oriented at about 45 degrees to the longitudinal direction of the first wood lamella.
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