Assembled Board Composite Element Adhesive-Free Joining
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Solution Overview
Problem
Existing composite elements for building construction, particularly in wooden houses, face challenges in achieving load-bearing and sealing functions while being free of adhesives, with existing solutions either being complex to produce or lacking stability and tightness.
Innovation Solution
A composite element design featuring boards with a single recess on top and/or bottom, delimited by projections, allowing for a stable connection of multiple boards in a form-fitting manner, ensuring stability in all directions except the longitudinal direction, and utilizing a press fit for adhesive-free assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If dovetail joints with multiple recesses and projections are used to connect boards, then the connection stability is improved, but the manufacturing complexity increases significantly
Solution Approach 1:
The connection system is segmented into a simple recess in the support board and a corresponding projection in the superimposed board, eliminating the need for complex dovetail joints with multiple recesses and projections on each board
Solution Approach 2:
The connection function is merged into a single recess-projection interface between the support board and superimposed board, rather than requiring multiple separate dovetail joints, simplifying both design and manufacturing
2Stability of the object's composition
If additional fixing means such as pins and connecting elements are provided to prevent transverse movement, then the connection stability is improved, but the device complexity increases
Solution Approach 1:
Additional fixing means such as pins and connecting elements are extracted from the design, as the recess-projection interface alone is sufficient to prevent transverse movement and provide stable connection
Solution Approach 2:
The recess-projection interface is designed to automatically prevent transverse movement through its geometric configuration, eliminating the need for separate fixing means
3Ease of manufacture
If boards are connected side by side only, then the ease of manufacture is improved, but the adaptability for layered construction is reduced
Solution Approach 1:
The recess-projection connection system is designed to be universal, allowing boards to be connected both side by side and in layered configurations, as the same interface geometry supports both assembly methods
Data Source
Figure 1a~1e
Figure 2a~2d
Figure 2e~2f
AI summary
The invention relates to a board (1) for a composite element (8) formed by several identical boards (1), wherein the board (1) has a cross-section along a longitudinal direction which has at least one recess (2) as well as a first projection (3) and a second projection (4).In order to produce a dense and high-strength composite element (8) from several identical boards (1), the invention provides that the board (1) is designed such that the first projection (3) of a first such board (1) and the second projection (4) of a second such board (1) located next to the first board (1) can be inserted into the recess (2) of a third such board (1) arranged on the adjacent boards (1), so that the first projection (3) of the first board (1) and the second projection (4) of the second board (1) are connected to the recess (2) via at least one inner contact surface (5) each, and the two adjacent boards (1) are connected via a common lateral contact surface (6), wherein the first board (1), the second board (1), and the third board (1) are positively connected to one another by the contact surfaces (5, 6). The invention further relates to the use of such a composite element (8).Furthermore, the invention relates to a method for producing a composite element (8).