Plastic Floor Panel Edge Locking with Break-Away Points
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Solution Overview
Problem
Floor panels with plastic carrier layers face issues with aesthetic gaps due to thermal expansion and contraction, leading to unsightly gaps and reduced surface robustness when using traditional mechanical locking systems.
Innovation Solution
Incorporating edge break-away points at the decorative layer edges, such as chamfers or mortises, along with a counteracting layer and reinforcement, and using thermoplastic or amorphous elastomers for the carrier layer, combined with complementary mechanical locking features like grooves, tongues, and hook elements with undercuts to enhance stability and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional mechanical locking means are used on floor panels with plastic carrier layers, then the panels can be installed using floating installation method, but temperature fluctuations cause the panels to expand or shrink leading to gaps forming between adjacent panel edges
Solution Approach 1:
The patent applies preliminary anti-action by designing the mechanical locking means with elastic elements that preemptively counteract the expanding forces generated during summer months. The elastic locking elements are pre-configured to flex and absorb thermal expansion forces before they can cause panel separation or damage to the locking mechanism.
Solution Approach 2:
The patent utilizes parameter changes by selecting plastic materials with specific thermal expansion coefficients and elastic moduli that allow the carrier layer to accommodate temperature-induced dimensional changes. The mechanical locking means are designed with adjustable clearance and elasticity parameters that optimize performance across temperature ranges.
2Productivity
If the carrier layer thickness is reduced to achieve thinner floor panels, then productivity and material efficiency improve, but the quality and strength of mechanical locking means decrease
Solution Approach 1:
The patent applies composite materials by combining the plastic carrier layer with a reinforcement layer made of fiber-reinforced material or metal mesh. This composite structure provides the necessary mechanical strength for the locking means while keeping the overall panel thickness reduced. The reinforcement layer is strategically positioned to enhance locking element performance without adding excessive thickness.
Solution Approach 2:
The patent uses segmentation by separating the carrier layer into functional zones: a base carrier layer for flexibility and a localized reinforcement zone at the edges where mechanical locking means are positioned. This allows thinning of the overall panel while maintaining locking strength at critical locations through targeted reinforcement.
3Strength
If plastic material is used for the carrier layer instead of hard rigid wood or wood-like materials, then the floor panels achieve higher strength and lower overall thickness, but aesthetic gaps and reduced surface robustness occur due to thermal expansion
Solution Approach 1:
The patent converts the harmful effect of thermal expansion into a beneficial feature by designing the mechanical locking means with built-in elastic compliance. The elastic elements absorb expansion forces and maintain continuous contact between panels, transforming what would be a source of gaps and damage into a mechanism that ensures tight joints and robust surface appearance throughout temperature cycles.
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 prevents material breakage, maintains panel flatness, and improves the durability and aesthetic appeal of the floor covering by minimizing gaps and enhancing mechanical locking strength, while allowing for flexible installation and dimensional stability.
Implementation Method 1
Temperature fluctuations make the individual floor panels expand or shrink
Implementation Method 2
a carrier layer of a plastic material that is pliable and yet largely resistant to dents
Data Source
AI summary
A floor panel has a carrier layer which is a plastic material that is pliable and elastic at an application temperature of the flooring. A decorative layer is disposed above the carrier layer. Complementary mechanical locking profiles provided on at least two panel edges. The locking profiles cooperating in the locked state of two floor panels and counter-acting a moving apart of the floor panels. At least one panel edge has an edge break-away point at the edge of the decorative layer.