Insulation Panels with Segmented Tongue and Groove Joints
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Solution Overview
Problem
Existing under-rafter insulation systems face issues with thermal bridges, uneven mounting, and difficulty in assembly due to high friction in tongue and groove designs, leading to suboptimal insulation performance and moisture accumulation.
Innovation Solution
The insulation board features longitudinal and horizontal recesses for mounting battens and profile rails, with adjustable grooves and elastic projections for central positioning and clamping, along with a sealing mechanism using narrower tongues and transverse sealing lips to reduce friction and ensure a tight seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If clamping tongue and groove formations are used on insulation panels, then the panels can be connected together, but the insulating panels are very difficult to assemble due to high frictional resistance and large clamping surface
Solution Approach 1:
The tongue and groove connection is segmented into multiple smaller contact points rather than a large continuous clamping surface. The groove is divided into several sections with individual tongues fitting into each section, reducing the total frictional resistance while maintaining connection stability through distributed contact points.
Solution Approach 2:
Instead of a uniform large-area clamping surface, the invention applies localized contact points at specific positions along the tongue and groove. The frictional resistance is concentrated at discrete locations rather than distributed over a large surface, making insertion easier while maintaining adequate connection strength at critical points.
2Adaptability or versatility
If standard width grooves are used for mounting battens, then the grooves can accommodate standard battens, but mounting battens with slight oversize cannot be inserted and undersized battens are difficult to align centrally
Solution Approach 1:
The groove width is made adjustable or flexible rather than fixed at standard batten width. The groove can dynamically adapt its effective width to accommodate both standard and slightly oversized battens, while still providing adequate support and alignment for smaller battens through adjustable positioning mechanisms.
Solution Approach 2:
The groove design serves multiple functions: it accommodates standard width battens, accepts slightly oversized battens through expanded width, and provides central alignment features for undersized battens. This multi-functional groove replaces the need for multiple groove types, enhancing versatility while maintaining ease of alignment through integrated positioning features.
3Shape
If mounting battens are made flush with the room-side surface of insulating elements, then a clean surface is achieved, but uneven mounting slats protrude beyond the interior surface into the interior of the room
Solution Approach 1:
The groove is designed with sufficient depth to accommodate variations in batten thickness and straightness before the batten reaches the room-side surface. This pre-cushioning of dimensional tolerances allows uneven or slightly curved battens to be fully contained within the groove, preventing protrusion into the room while maintaining a flush exterior surface.
Solution Approach 2:
The batten is nested within the groove, which acts as a containing structure. The groove fully encloses the batten, including any uneven portions, preventing them from protruding beyond the insulating element's exterior surface. This nesting arrangement accommodates manufacturing tolerances and batten deformations while maintaining a smooth outer surface.
4Quantity of substance
If two-layer full rafter insulation is used to achieve required insulation thickness, then the insulation thickness requirement is met, but thermal bridges occur at the crossing points of rafters and construction battens
Solution Approach 1:
The groove and tongue structure acts as an intermediary thermal break between the rafter framework and the insulation layers. The groove creates a discontinuity in the thermal path at rafter crossing points, interrupting the direct thermal bridge while still allowing mechanical support. This intermediary structure reduces heat transfer through the insulation assembly at critical junction points.
Solution Approach 2:
The continuous insulation layer is segmented by the groove structures at rafter and batten crossing points. These segmentation points create thermal breaks that interrupt heat flow paths, preventing the formation of continuous thermal bridges through the insulation assembly while maintaining the overall insulation thickness requirement through the layered construction.
Data Source
Figure 1~3
Figure 4
Figure 5~5a
AI summary
The arrangement has insulation plates (1) formed from plastic including notches (4) provided in their large surfaces for receiving guide rails. The notches are arranged parallel to each other and to a longitudinal extension of the rectangular insulation plates. The notches have breadth that is adapted to the guide rails utilized in the notches. Other notches (2) and springs (3) provided by their edges are provided for the form-fitting connection with the plates. The depth of the notches (4) is smaller than the thickness of the guide rails measured transverse to the plane of the plates.