Glazing Unit Edge Support for Polycarbonate Thermal Expansion
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Solution Overview
Problem
Existing glazing units with thermoplastic and silicate glass combinations face challenges in manufacturing complexity, material costs, and security against break-ins due to the need for flexible fixation to accommodate thermal expansion and the absorption of impact forces.
Innovation Solution
The glazing unit incorporates support elements on the edges to directly support the thermoplastic panel, reducing the load on sealants and allowing for vertical handling and storage, with modular spacers and desiccants to manage thermal expansion and enhance security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the thermoplastic pane is fixed using spacer elements and secondary sealant to accommodate thermal expansion, then the flexibility for thermal expansion is improved, but the device complexity and manufacturing cost increase due to multiple components
Solution Approach 1:
The patent combines the spacer element and secondary sealant into a single integrated unit. The spacer element includes a recess that receives the secondary sealant, creating a unified component that performs both spacing and sealing functions. This reduces the number of separate parts while maintaining the ability to accommodate thermal expansion between the thermoplastic and silicate glass panes.
Solution Approach 2:
The spacer element is designed to perform multiple functions simultaneously: it provides thermal expansion accommodation through its resilient properties, maintains the necessary distance between panes, and houses the secondary sealant for hermetic sealing. This multi-functional design eliminates the need for separate components for each function.
2Adaptability or versatility
If the thermoplastic pane is mounted above the clamping of the window glazing unit, then the thermal expansion flexibility is improved, but the burglary protection is worsened due to reduced structural support
Solution Approach 1:
The patent positions the support element and thermoplastic pane assembly above the clamping region before final assembly. This preliminary positioning allows the thermoplastic pane to be properly supported and secured to the spacer elements while maintaining thermal expansion flexibility. The structure is pre-configured to ensure both security and flexibility are achieved together.
3Adaptability or versatility
If the U-shaped profile and spacer elements are used to hold the plastic pane, then the thermal expansion compensation is improved, but the manufacturing time and cost increase due to additional edging steps
Solution Approach 1:
The patent merges the spacer element and secondary sealant into a single integrated component, eliminating the need for separate application steps. The secondary sealant is pre-positioned in the recess of the spacer element, reducing manufacturing steps and improving production efficiency while maintaining thermal expansion compensation capabilities.
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 simplifies manufacturing, reduces material costs, and enhances security against break-ins by distributing the load of the thermoplastic panel effectively, while maintaining thermal expansion compensation and improving the structural integrity of the glazing unit.
Implementation Method 1
The outer edge of the polycarbonate panel (2) is resiliently accommodated by a spring-like lip (11) facing away from the groove bottom (5b) of the receiving groove (5), in order to allow placement of the polycarbonate panel (2) loosely located in the glazing unit (1) in the expansion direction of the glass sheets (3, 4)
Implementation Method 2
a spring-like lip (11) facing away from the groove bottom (5b) of the receiving groove (5) is provided on at least two edge sections of the glazing unit (1) or of the polycarbonate panel (2) forming a right angle, in order to resiliently accommodate the outer edge (2a) of the polycarbonate panel (2)
Implementation Method 3
A desiccant is located in the U-shaped connecting rib and is intended to dry the spaces between each of the two glass plates and the thermoplastic plate
Data Source
Figure 1
Figure 1
Figure 2
AI summary
The glazing unit (1) has two glass plates (3,4) and a shatterproof thermoplastic plate (2) provided between the two glass plates. An edge (2a) of the thermoplastic plate is surrounded by a U-shaped receiving groove (5) of a receiving element (6). The receiving element has a support projection (20) in the area of an edge portion of the glazing unit, where the support projection forms a contact surface of the glazing unit with the two glass plates. The thermoplastic plate is formed from polycarbonate. A spring element is designed as resilient silicon foam.