Corner Piece Adhesive Flow Control for Window Profiles
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Solution Overview
Problem
Existing corner pieces for connecting metal window or door profiles at an angle face issues with adhesive flow out of inlet channels before the external channels are sufficiently filled, leading to mechanical weakness and incomplete sealing of mitre joints.
Innovation Solution
The corner piece design incorporates external channels for adhesive distribution with inlet channels that have a higher flow resistance than the passages, ensuring adhesive flows from the inside to the outside only when the external channels are fully filled, achieved through specific geometries such as conical or elongated inlet channels with decreasing diameters and bends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is injected through inlet channels into the internal hollow space, then adhesive can be distributed to external channels for sealing and bonding, but adhesive may flow out of inlet channels before external channels are sufficiently filled, leading to mechanical weakness and incomplete sealing
Solution Approach 1:
The patent changes the flow resistance parameter of the inlet channels by designing them with smaller cross-sectional areas, longer lengths, bends, or conical shapes compared to the passages. This parameter modification ensures that adhesive flows preferentially through the passages to external channels before flowing out through inlet channels, solving the problem of premature adhesive leakage and ensuring complete sealing.
2Reliability
If inlet channels have larger flow resistance than passages, then adhesive is prevented from flowing out before external channels are filled, but the design becomes more complex with specific geometric requirements for channels
Solution Approach 1:
The patent applies local quality by giving different geometric characteristics to different parts of the channel system. Specifically, inlet channels are designed with higher flow resistance through localized features such as reduced cross-sectional area, increased length, bends, or conical shapes, while passages maintain lower flow resistance. This localized differentiation achieves reliable adhesive flow control without requiring complex overall system 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
This design prevents adhesive from flowing out of the inlet channels until the external channels are adequately filled, ensuring a strong and sealed mitre joint, thereby enhancing the mechanical integrity and sealing effectiveness.
Implementation Method 1
the lowest flow resistance of the two or more inlet channels is greater than the lowest flow resistance of the one or more passages, so that adhesive is prevented from flowing from the inside to the outside through the inlet channels before the at least one external channel is sufficiently filled with adhesive supplied via the passage concerned
Data Source
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AI summary
Corner piece (1) for connecting metal window or door profiles (9) at an angle to one another, whereby the corner piece (1) is provided with one or more external channels (4) for spreading adhesive, whereby the external channels (4) are on the surface (5) of the corner piece (1), whereby the corner piece (1) is provided with two or more inlet channels (7A, 7B) that run inwards from the surface (5) of the corner piece (1), whereby the corner piece (1) is provided with one or more passages (8) that run from the two or more inlet channels (7A, 7B) to the external channels (4), characterised in that the lowest flow resistance of the two or more inlet channels (7A, 7B) is greater than the lowest flow resistance of the one or more passages (8).