Formwork panel for concreting formworks

1. A formwork panel having a length, a width, and a thickness, the panel comprising:

a supporting structure having:

a first face side and a second face side, wherein the second face side is disposed opposite the first face side;

a first side wall and a second side wall, each extending in a thickness direction between the first face side and the second face side;

a first end wall and a second end wall, each extending in a thickness direction between the first face side and the second face side;

wherein the first side wall and the second side wall each extend lengthwise between and are connected to the first end wall and the second end wall, and wherein the first end wall and the second end wall extend widthwise between the first side wall and the second side wall;

a plurality of first intermediate walls spaced apart from one another, each extending between and connected to the first side wall and the second side wall, and each extending in the thickness direction;

a plurality of second intermediate walls spaced apart from one another, each extending between and connected to the first end wall and the second end wall, and each extending in the thickness direction;

wherein the plurality of first intermediate walls intersects with the plurality of second intermediate walls, thereby defining openings disposed between adjacent first intermediate walls and adjacent second intermediate walls, which openings extend between the first face side and the second face side; and

at least one formwork skin having a front side surface, a rear side surface, which rear side surface is opposite the front side surface, and a plurality of first extensions extending out from the rear side surface, wherein the formwork skin is independent of the supporting structure; and

wherein each first extension aligns with a respective intersection of one of the first intermediate walls and one of the second intermediate walls and is releasably attached to the supporting structure at said intersection, thereby releasably attaching the formwork skin to the supporting structure; and

wherein each of the first and second side walls, and each of the first and second end walls includes a plurality of wall openings.

2. The formwork panel of claim 1 , wherein the supporting structure and the formwork skin are each a plastic material.

3. The formwork panel of claim 1 , wherein the plurality of first extensions are integrally molded with the formwork skin.

4. The formwork panel of claim 1 , wherein each of the first and second side walls and each of the first and second end walls has a U-shaped double-wall structure, and each of the wall openings is elongated and includes an opening circumferential wall extending through the respective U-shaped double-wall structure.

5. A formwork panel having a length, a width, and a thickness, the panel comprising:

a supporting structure having:

a first face side and a second face side, wherein the second face side is disposed opposite the first face side;

a first side wall and a second side wall, each extending in a thickness direction between the first face side and the second face side;

a first end wall and a second end wall, each extending in a thickness direction between the first face side and the second face side;

wherein the first side wall and the second side wall each extend lengthwise between and are connected to the first end wall and the second end wall, and wherein the first end wall and the second end wall extend widthwise between the first side wall and the second side wall;

a plurality of first intermediate walls spaced apart from one another, each extending between and connected to the first side wall and the second side wall, and each extending in the thickness direction;

a plurality of second intermediate walls spaced apart from one another, each extending between and connected to the first end wall and the second end wall, and each extending in the thickness direction;

wherein the plurality of first intermediate walls intersects with the plurality of second intermediate walls, thereby defining openings disposed between adjacent first intermediate walls and adjacent second intermediate walls, which openings extend between the first face side and the second face side; and

at least one formwork skin having a front side surface, a rear side surface, which rear side surface is opposite the front side surface, and a plurality of first extensions extending out from the rear side surface, wherein the formwork skin is independent of the supporting structure; and

wherein each first extension aligns with a respective intersection of one of the first intermediate walls and one of the second intermediate walls and is releasably attached to the supporting structure at said intersection, thereby releasably attaching the formwork skin to the supporting structure; and

wherein the supporting structure and the formwork skin are each a plastic material.

6. The formwork panel of claim 5 , wherein the supporting structure consists of a first type of plastics material having a first strength, and the formwork skin consists of a second type of plastics material having a second strength, wherein the first strength is greater than the second strength.

7. The formwork panel of claim 5 , wherein the plurality of first extensions are integrally molded with the formwork skin.

8. The formwork panel of claim 5 , wherein each of the first intermediate walls is hat-shaped, having a closed end disposed at the second face side, an open end disposed at the first face side, and a pair of first flanges extending outwardly therefrom at the open end of the respective first intermediate wall; and

wherein each of the second intermediate walls is hat-shaped, having a closed end disposed at the second face side and an open end disposed at the first face side, and a pair of second flanges extending outwardly therefrom at the open end of the respective second intermediate wall.

9. The formwork panel of claim 8 , wherein each first extension is received within the open ends of the first and second intermediate walls at the respective intersection of one of the first intermediate walls and one of the second intermediate walls.

10. The formwork panel of claim 9 , further comprising a plurality of channels, each respective channel located within the open ends of the first and second intermediate walls at the respective intersection of one of the first intermediate walls and one of the second intermediate walls.

11. The formwork panel of claim 9 , further comprising a plurality of fasteners, each of which engages a respective one of the first extensions to releasably attach the formwork skin to the supporting structure.

12. The formwork panel of claim 9 , wherein the formwork skin further comprises a plurality of second extensions extending out from the rear side surface;

wherein each second extension aligns with a respective connection of one of the first intermediate walls and one of the side walls.

13. The formwork panel of claim 12 , wherein each second extension is received within the open end of a respective one of the first intermediate walls at the intersection of the respective one of the first intermediate walls and a respective one of the side walls.

14. The formwork panel of claim 13 , wherein the formwork skin further comprises a plurality of third extensions extending out from the rear side surface;

wherein each third extension aligns with a respective connection of one of the second intermediate walls and one of the end walls.

15. The formwork panel of claim 14 , wherein each third extension is received within the open end of a respective one of the second intermediate walls at the intersection of the respective one of the second intermediate walls and a respective one of the end walls.

16. The formwork panel of claim 15 , further comprising a plurality of fasteners, each of which engages a respective one of the first extensions, second extensions, or third extensions to releasably attach the formwork skin to the supporting structure.

17. The formwork panel of claim 8 , wherein each first intermediate wall extends a distance between the first side wall and the second side wall, and the first flanges extend outwardly from the open end of each respective first intermediate wall for substantially all of the distance between the first side wall and the second side wall; and

wherein each second intermediate wall extends a distance between the first end wall and the second end wall, and the second flanges extend outwardly from the open end of each respective second intermediate wall for substantially all of the distance between the first end wall and the second end wall.

18. The formwork panel of claim 5 , wherein the first side wall, the second side wall, the first end wall, and the second end wall define an outer periphery of the panel.

19. The formwork panel of claim 5 , wherein each of the plurality of first extensions is configured as a male portion that engages a mating female portion at the respective aligned intersection of the one of the first intermediate walls and the one of the second intermediate walls, which mating male and female portions releasably attach the formwork skin to the supporting structure.

20. The formwork panel of claim 19 , wherein each of the mating male and female portions form a clip-type connection.

21. The formwork panel of claim 5 , wherein the first face side is separated from the second face side by a distance, and at least some of the plurality of first intermediate walls extend the distance between the first face side and the second face side.

22. The formwork panel of claim 5 , wherein the first face side is separated from the second face side by a distance, and at least some of the plurality of second intermediate walls extend the distance between the first face side and the second face side.

23. The formwork panel of claim 5 , wherein the first face side is separated from the second face side by a distance, and the first side wall and the second side wall each extend the distance between the first face side and the second face side.

24. The formwork panel of claim 5 , wherein the first face side is separated from the second face side by a distance, and the first end wall and the second end wall each extend the distance between the first face side and the second face side.

25. The formwork panel of claim 8 , wherein each of the first and second side wall, and each of the first and second end walls includes a plurality of wall openings.

26. The formwork panel of claim 25 , wherein each of the first and second side walls and each of the first and second end walls has a U-shaped double-wall structure, and each of the wall openings is elongated and includes an opening circumferential wall extending through the respective U-shaped double-wall structure.

27. The formwork panel of claim 8 , wherein the plurality of first extensions are integrally molded with the formwork skin.

28. The formwork panel of claim 5 , wherein each of the first and second side wall, and each of the first and second end walls includes a plurality of wall openings; and

wherein each of the first and second side walls and each of the first and second end walls has a U-shaped double-wall structure, and each of the wall openings is elongated and includes an opening circumferential wall extending through the respective U-shaped double-wall structure.