Molded Adhesive Bar for Panel Locking Stability
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Solution Overview
Problem
Existing connection elements for panels, such as those made from HDF or MDF, suffer from visible gaps and poor mechanical stability, especially at narrow edges, and previous solutions either require excessive material or result in panels being easily loosened.
Innovation Solution
A groove is created on one side of a board with a tongue on the opposite side, and an adhesive or plastic material is applied in a free-flowing condition, which is then hardened to form a locking element that resists mechanical strains, allowing for higher extraction forces and durable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection elements are made from HDF or MDF material, then manufacturing is simple and cost-effective, but visible gaps form quickly and mechanical stability is poor
Solution Approach 1:
The connection element combines two different materials: HDF/MDF base material providing structural support and ease of manufacture, plus a different material (such as plastic or adhesive material) applied to the locking surface providing enhanced mechanical stability and gap prevention. This composite structure resolves the contradiction by leveraging the advantages of both materials.
Solution Approach 2:
Instead of making the entire connection element from a single material, the invention applies a different material only to the critical locking surface area where mechanical stability is needed. This local application of different material properties resolves the contradiction by providing enhanced stability only where required, while maintaining the manufacturing advantages of HDF/MDF for the bulk structure.
2Reliability
If a flank of groove is produced from different material at narrow edge, then connection between panels is improved, but material consumption increases significantly
Solution Approach 1:
The invention applies different material only to the specific locking surface area within the groove or on the tongue, rather than replacing entire panel edges or adding substantial material layers. This localized application provides improved connection quality while minimizing material consumption.
Solution Approach 2:
The invention extracts only the essential function of material replacement by applying different material solely to the locking interface area, rather than replacing large portions of the panel edge material. This selective approach provides connection improvement without excessive material usage.
3Ease of manufacture
If connection elements are produced only from different material, then milling processing is eliminated, but panels can be loosened with relatively low effort
Solution Approach 1:
The combination of HDF/MDF base material (which can be milled to create the groove and tongue structures) with an additional different material applied to the locking surface creates a composite connection element that benefits from both the ease of milling the base material and the enhanced anti-loosening properties of the different material.
4Strength
If adhesive or plastic material is applied in free-flowing condition and then hardened, then locking elements gain resistance to mechanical strains, but production time increases due to hardening process
Solution Approach 1:
The invention utilizes materials that can change their properties through parameter changes during the hardening process, transitioning from a free-flowing or formable state (easy to apply and form) to a hardened state (high mechanical strength). This parameter change allows the material to fulfill both the ease of application and the strength requirements.
Solution Approach 2:
The adhesive or plastic material undergoes a phase transition from a fluid or soft state during application to a solid hardened state, providing mechanical strength. This phase transition enables the material to be easily applied in its soft state and then provides the required structural resistance after hardening.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides a more stable and durable connection between panels, minimizing material usage and preventing gaps, with extraction forces significantly higher than previous methods, while maintaining a cost-effective manufacturing process.
Implementation Method 1
The applicated and, if appropriate, already formed adhesive or plastic material is brought in a hardened or cured condition, for example by means of drying.
Implementation Method 2
With regard to production speed the adhesive or the plastic material is preferably chosen such that the same hardens in reaction to a chemical reaction.
Data Source
AI summary
The invention relates to connection elements comprising a tongue (3) and a groove (10), and an additional locking element (6) which is connected thereto in a non-positive manner, which consists of a plastic or adhesive material and is especially embodied as a bar.