Overmoulded Section Bar for Leak-Tight Shower Panel Joints
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Solution Overview
Problem
Existing shower and sauna box panel assembly techniques face issues with temporary tightness due to mechanical stresses, require manual gluing or sealing, and lack aesthetic appeal, especially at junction points where water or steam can escape.
Innovation Solution
A section bar with a U-shaped profile and integrated lip seals, overmoulded connecting elements, and latching means ensures hermetic sealing without adhesives, allowing for easy assembly and improved aesthetics by forming a single, continuous material body that maintains tightness through interference fits and flexible seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical working and gluing or sealing agents are used to join section bars, then tightness is improved, but the duration of tightness is reduced due to mechanical stresses and rubbing
Solution Approach 1:
The patent integrates the sealing function directly into the section bar structure by providing a groove with an integrated seal (such as a lip seal or magnetic seal) that is part of the extruded profile itself. This merging of the structural and sealing functions eliminates separate gluing operations and creates a permanent, stress-resistant seal that maintains tightness over time without degradation from mechanical stresses or rubbing.
Solution Approach 2:
The patent replaces the mechanical gluing system with an integrated mechanical-sealing system where the seal is built into the extruded profile. This substitution eliminates the need for adhesives and creates a more durable connection that relies on the inherent mechanical properties of the integrated seal rather than on glue bonds that degrade under stress.
2Reliability
If manual gluing or sealing operations are performed, then tightness is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The sealing function is merged into the section bar extrusion process itself. The groove and seal are formed as integral parts of the extruded profile in a single manufacturing operation, eliminating separate manual gluing or sealing steps. This integration significantly reduces manufacturing cost and complexity while maintaining reliable tightness.
Solution Approach 2:
The seal is pre-integrated into the section bar during the extrusion process before assembly. This preliminary action of incorporating the seal during manufacturing eliminates the need for subsequent manual sealing operations, reducing both cost and complexity while ensuring consistent tightness quality.
3Reliability
If manual sealing operations are performed, then tightness is improved, but quality consistency deteriorates
Solution Approach 1:
The sealing function is merged into the extruded profile as an integral feature. This ensures that every section bar produced has the same seal geometry and positioning, guaranteeing consistent quality across all products without variation from manual operations. The seal is automatically positioned with precision during extrusion.
Solution Approach 2:
The extrusion process itself provides the sealing function through the integrated groove and seal design. The manufacturing process automatically creates the sealing feature without requiring additional manual interventions, ensuring that every piece receives the same precise sealing treatment and eliminating quality variability.
4Adaptability or versatility
If separate angle elements are used for junction and sealing, then assembly flexibility is improved, but aesthetic quality deteriorates due to visible joints and adhesive residue
Solution Approach 1:
The section bar is designed as a continuous extruded profile that integrates both structural and sealing functions in a single aesthetic element. The groove and seal are formed as part of the smooth continuous profile, eliminating visible joints and adhesive residue while maintaining the flexibility to assemble different panel configurations.
Solution Approach 2:
The section bar maintains a homogeneous appearance throughout, with the integrated groove and seal forming a seamless continuation of the profile. This homogeneity eliminates the visual disruption of separate angle elements and adhesive residue, providing a clean aesthetic finish while preserving assembly flexibility through the standardized groove design.
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 long-lasting hermetic sealing without adhesives, simplifies assembly by eliminating mechanical tolerancing and gluing, and enhances aesthetic appeal by avoiding adhesive residue and mechanical interruptions.
Implementation Method 1
a first lip seal (8) which extends under the base (6), away from the main body (2), in the opposite direction to that towards which the aperture (7) of the U-shaped seat (3) is turned
Implementation Method 2
a connecting element (9) which is overmoulded, along an overmoulding region (S), both on the main body (2) and on the first lip seal (8), so as to form a single body therewith
Implementation Method 3
two teeth (23) reducing the entry section of seat (3) so as to increase the interference between bar (1) and panel (4) and thus ensure better coupling
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A section bar for panels, in particular for walls of a shower box, sauna box and the like, comprises at least one main body (2) of longitudinal major extension defining a seat (3) having a U-shaped outline, delimited by two side walls (5) and a base (6) and having an aperture (7) opposite to said base (6) and suitable for coupling with a panel (4), and at least one first lip seal (8) extending from the base (6) away from the main body (2), in the opposite direction to that towards which the aperture (7) of the U-shaped seat (3) is turned. At least at a first end (2a) of the main body (2) there is a connecting element (9) comprising an upper portion (10) overmoulded on the main body (2) with which it forms a single body, and a lower portion (11) extending away from the upper portion (10) and overmoulded on the first lip seal (8) in such a manner as to form a single sealing edge with the latter.