Plastic End Rail with Flexible Expansion Zone for Thermal Insulation
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Solution Overview
Problem
Conventional one-piece metallic end rails for building thermal insulation are prone to corrosion, reduce insulating effectiveness, and cannot compensate for construction tolerances or varying insulation thicknesses, leading to moisture ingress and plaster cracks.
Innovation Solution
A one-piece end rail made of plastic with a softer expansion area between its legs, allowing for adjustable positioning and accommodating different insulation thicknesses, which also includes a reinforcement mesh for added stability and moisture protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal angle rails are used for thermal insulation, then the structure provides mechanical support and positioning, but corrosion occurs and thermal conductivity reduces insulating effectiveness
Solution Approach 1:
The patent changes the material parameter from metal to plastic, fundamentally altering the thermal conductivity and corrosion resistance properties. This material substitution eliminates thermal bridges while providing corrosion-free durability, directly resolving the contradiction between structural support and thermal insulation effectiveness.
Solution Approach 2:
The end rail utilizes composite construction with a plastic base material combined with integrated reinforcement elements and softer plastic sections. This composite approach maintains mechanical strength and positioning capability while preserving thermal insulation performance, avoiding the corrosion and thermal conductivity issues of pure metal construction.
2Ease of manufacture
If one-piece metal end rails are used, then manufacturing is simple and cost-effective, but construction tolerances and insulation thickness variations cannot be compensated
Solution Approach 1:
The end rail is segmented into zones with different plastic hardness: a harder main body for structural integrity and a softer section for tolerance absorption. This segmentation allows the rail to maintain manufacturing simplicity while adapting to construction variations through the differential deformation characteristics of the plastic zones.
Solution Approach 2:
The patent changes the physical state parameter of the plastic material by incorporating zones with different hardness levels. The softer plastic zone can deform elastically to accommodate tolerance variations, while the harder zones maintain structural stability, enabling both ease of manufacture and adaptability.
3Stability of the object's composition
If rigid one-piece end rails are used, then structural stability is provided, but plaster cracks occur due to temperature fluctuations and insulation expansion
Solution Approach 1:
The end rail incorporates a softer plastic zone that acts as a shock-absorbing element between the rigid mounting sections. This segmentation allows the rail to maintain overall structural stability while the softer zone absorbs expansion and contraction forces, preventing stress transmission to the plaster and avoiding cracks.
Solution Approach 2:
The softer plastic zone functions as a pre-designed cushioning element that absorbs thermal expansion and contraction forces before they can transmit to the plaster layer. This beforehand cushioning prevents the buildup of stress that would otherwise cause plaster cracking during temperature fluctuations.
4Adaptability or versatility
If two-part end rails are used to accommodate different insulation thicknesses, then flexibility and tolerance compensation are improved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent merges multiple functions into a single one-piece plastic rail: structural support, tolerance compensation, and insulation thickness accommodation are all integrated into one component. The different hardness zones within the single piece provide adaptability without requiring assembly of multiple parts, thus reducing manufacturing complexity while maintaining versatility.
Solution Approach 2:
The one-piece end rail with differential hardness zones serves multiple functions simultaneously: it provides mechanical support, accommodates various insulation thicknesses, compensates for construction tolerances, and prevents plaster cracking. This multi-functionality eliminates the need for separate components required in two-part designs, reducing complexity.
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 plastic end rail prevents corrosion, maintains insulation effectiveness, compensates for construction tolerances and temperature-related movements, and reduces the need for multiple rail types, thus enhancing the security and durability of thermal insulation while preventing moisture and animal ingress.
Implementation Method 1
in a transition area between the second leg and the outer strip area there is an expansion area made of a plastic that is softer than the plastic of the second leg and the outer strip area, which allows the third leg to be arranged in allows different distances to the first leg
Implementation Method 2
The first leg, the second leg and the outer strip area are made of plastic... the thermal conductivity of the metal angle rail reduces the insulating effect
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The rail (2) has an external rail area (16) provided with first arm (20) for a system with respect to an outer side of an insulation. A second arm (4) includes a third arm (6) and the rail area. An expansion region (8) is arranged between the third arm and the rail area in a transition region to adjust the first arm at different distances from the second arm. The expansion region is made of plastic and flexible with respect to the third arm and the rail area. The second arm and the third arm are made of hard plastic e.g. PVC, polystyrene or polyurethane. The external rail area is made from a soft and flexible plastic such as soft PVC or thermoplastic elastomer.