Window Reinforcement Profile Fixing Without Screw Fasteners
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Solution Overview
Problem
Reinforcing profiles made of steel or glass fiber reinforced plastics often fail to lie flush against the inner contour of PVC hollow chamber profiles due to manufacturing tolerances, leading to warping and ineffective reinforcement when subjected to heat or force, necessitating screws for secure connection.
Innovation Solution
A reinforcement profile with a compressible sealing profile that forms a force-fit connection with the plastic window profile, eliminating the need for screws by using a tubular sealing profile that expands to press against the reinforcement profile, ensuring a secure, non-slip connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reinforcing profiles are firmly connected to hollow chamber profiles by screws, then connection reliability is improved, but device complexity and assembly time increase
Solution Approach 1:
The invention extracts the fastening function from the screw connection system and relocates it to the sealing profile itself. The sealing profile is designed with a compressed state that generates expanding force to press the reinforcement profile against the hollow chamber profile, eliminating the need for separate fasteners like screws while maintaining reliable connection.
Solution Approach 2:
The sealing profile performs multiple functions: it seals the gap between profiles and simultaneously provides the fastening force through its compressed state. The sealing profile's elastic properties enable it to self-adjust and maintain constant pressure on the reinforcement profile, creating a self-regulating connection system without external fasteners.
2Ease of manufacture
If reinforcing profiles are inserted into reinforcement chambers without pre-compression of sealing profiles, then assembly simplicity is improved, but connection reliability deteriorates due to displacement
Solution Approach 1:
The sealing profile is pre-compressed during the insertion process itself. As the reinforcement profile with the sealing profile is pushed into the hollow chamber profile, the sealing profile is compressed between the reinforcement profile and the hollow chamber profile, generating the necessary expanding force to ensure reliable connection without requiring separate pre-compression steps.
3Reliability
If the sealing profile height is made greater than the clearance between profiles, then connection reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The sealing profile's height parameter is designed to be greater than the clearance between profiles in its uncompressed state. During assembly, the sealing profile is compressed, reducing its height to fit within the clearance. The elastic properties of the sealing profile allow it to dynamically adjust its dimension, accommodating variations in manufacturing tolerances while maintaining reliable connection.
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 compressible sealing profile creates a secure, non-slip connection between the reinforcement and plastic window profiles, preventing displacement during normal handling and reducing assembly time and labor.
Implementation Method 1
the sealing profile (3) is compressed, then the reinforcement profile (2) with the sealing profile (3) is inserted into the reinforcement chamber (4)
Implementation Method 2
the sealing profile (3) is relieved of the compressing forces... the sealing profile then tries to return to its original shape, it exerts pressure on the devices
Implementation Method 3
it exerts pressure on the devices, whereby static friction opposes this urge to move
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A reinforcement profile (2) for a plastic window profile (1), wherein the plastic window profile (1) has at least one reinforcement chamber (4), is suitable for receiving the reinforcement profile (2). At least one compressible sealing profile (3) is arranged on at least one surface of the reinforcement profile (2).