Plastic Window Sill Rim Profile with Integrated Sealing Lip
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Solution Overview
Problem
Existing window sill rim profiles are difficult to cut to the required length on-site, leading to potential thermal bridges and increased installation time due to the need for specialized tools and complex assembly processes.
Innovation Solution
A rim profile made of plastic, specifically designed for easy on-site cutting and assembly, featuring a coextruded duroplastic and thermoplastic elastomer construction with adjustable supports and sealing lips, allowing for correct overhang and thermal insulation without screws, thus avoiding thermal bridges and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If aluminum edge profiles are used with specialized cutting tools, then cutting precision is improved, but installation time and device complexity increase
Solution Approach 1:
The patent changes the material parameter from metal (aluminum) to plastic (PVC), which fundamentally alters the cutting requirements. Plastic profiles can be cut with simple hand tools like knives or saws, eliminating the need for specialized metal cutting tools and reducing installation time while maintaining adequate cutting precision for the application.
Solution Approach 2:
The patent employs inexpensive plastic profiles that can be easily cut and disposed of if needed, replacing durable but difficult-to-cut aluminum profiles. The plastic material allows for simple, quick cutting with common tools, reducing both tool cost and installation time.
2Strength
If aluminum edge profiles are used, then structural strength is improved, but thermal insulation performance worsens due to thermal bridges
Solution Approach 1:
The patent uses plastic (PVC) material that combines adequate structural strength for the application with inherent thermal insulation properties. The plastic profile eliminates thermal bridges while providing sufficient strength to support the window sill and maintain the structural integrity of the assembly.
Solution Approach 2:
The patent changes the material parameter from conductive metal to insulating plastic, fundamentally altering the thermal properties of the edge profile. This material substitution eliminates thermal bridge formation while maintaining adequate mechanical strength for the window sill support application.
3Reliability
If sealing lips are inserted between grooves during assembly, then sealing effectiveness is improved, but assembly complexity and time increase
Solution Approach 1:
The patent merges the sealing lip into the profile structure itself, either as an integrated component or pre-attached element. This eliminates the separate step of inserting sealing lips into grooves during assembly, reducing assembly complexity and time while maintaining sealing effectiveness through the integrated design.
Solution Approach 2:
The patent prepares the sealing lips in advance by pre-attaching them to the profile or pre-positioning them in the grooves before final assembly. This preliminary action eliminates the need for separate sealing lip insertion steps during installation, reducing assembly complexity while ensuring proper sealing positioning.
4Manufacturing precision
If edge profiles are delivered cut to predetermined length, then manufacturing precision is improved, but adaptability to construction site variations worsens
Solution Approach 1:
The patent changes the material parameter to plastic, which can be easily cut and adjusted on-site with simple tools. This allows the profiles to be delivered in longer sections and cut to precise lengths at the construction site, combining the benefits of precise length adjustment with adaptability to manufacturing tolerances and site variations.
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
Enables precise on-site cutting and adjustment of the rim profile to ensure correct overhang and thermal insulation, reducing installation time and preventing thermal bridges, while providing effective sealing and easy maintenance.
Implementation Method 1
Both plastics are connected to one another in one piece, which can be achieved in that the edge profile is produced as an extrusion profile and the two plastics are connected to one another in one piece by bringing together different plastic melts and then extruding the combined melts through a profile die.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A sill profile (3) for mounting a window sill (1), in particular an exterior window sill, has an angle profile with a first leg (4) and a second leg (5) that can be attached to the masonry of a reveal. The first leg (4) has at least one support (10, 11) on its upper side, designed as a projection, for the window sill (1). At least one sealing lip (12) extending along the upper side of the first leg (4) is arranged and projects perpendicular to the plane spanned by the first leg (4) beyond the at least one support (10, 11). The legs (4, 5) are made of a first plastic, and the sealing lip (12) is made of a second plastic integrally connected to it. The second plastic is softer than the first plastic. (Fig. 1)