Vacuum Insulated Glazing Dense Side Seal Pre-heating
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Solution Overview
Problem
Existing methods for producing vacuum insulated glazing (VIG) units face challenges such as foaming of side seal materials during the sealing process, which can lead to porous seals and incomplete joining of glass panes.
Innovation Solution
A method involving pre-heating the side seal material to a specific temperature using a near-infrared or infrared heat source, causing it to foam and densify, thereby removing gaseous inclusions and forming a dense, low-porosity seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If side seal material is heated during sealing to melt and adhere to glass panes, then bonding strength is improved, but gaseous inclusions form causing foaming and porous structure
Solution Approach 1:
The side seal material is pre-heated before the actual sealing process to remove gaseous inclusions and prevent foaming during bonding. This preliminary action eliminates the harmful gases that would otherwise cause porous structure during the heating and adhering phase, allowing the material to bond strongly without forming bubbles.
Solution Approach 2:
The gaseous inclusions that normally cause harmful foaming are addressed by pre-heating the material to allow controlled outgassing before sealing. The harmful effect of gas release is converted into a beneficial pre-treatment step that prevents defective foaming during the actual bonding process, ensuring dense and strong seals.
2Manufacturing precision
If heating is performed slowly to defoam internal gases, then seal quality is improved, but manufacturing time increases
Solution Approach 1:
A dedicated pre-heating step is performed before sealing to remove gaseous inclusions in advance. This preliminary defoaming action eliminates the need for prolonged slow heating during the sealing process itself, thereby maintaining high seal quality while reducing total manufacturing time.
Solution Approach 2:
The heating process is segmented into two distinct phases: a pre-heating phase for defoaming and a sealing phase for bonding. This segmentation allows each phase to be optimized independently - pre-heating removes gases efficiently, and sealing proceeds quickly without the need for prolonged slow heating, thus improving both quality and productivity.
3Manufacturing precision
If pre-heating is performed to remove gaseous inclusions, then foaming during sealing is reduced, but additional process step is required
Solution Approach 1:
The pre-heating and sealing operations are merged into a single continuous heating process using the same heat source. The pre-heating phase prepares the material by removing gases, and the sealing phase follows immediately without interruption. This merging eliminates the need for separate equipment or distinct process lines, adding minimal complexity while achieving dense seals.
Solution Approach 2:
The pre-heating step is integrated as a preliminary phase within the overall sealing process. By preparing the material in advance within the same heating system, the process adds a necessary function without requiring separate complex equipment, thus improving seal density with minimal increase in process complexity.
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 approach significantly reduces foaming during the sealing process, allowing for complete joining of glass panes and the formation of a strong, dense side seal with minimal porosity, thus enhancing the quality and efficiency of VIG unit production.
Implementation Method 1
A method involving pre-heating the side seal material to a specific temperature using a near-infrared or infrared heat source
Implementation Method 2
pre-heating the side seal material to a specific temperature using a near-infrared or infrared heat source
Implementation Method 3
the side seal material is heated such that it melts to ensure that the side seal material adhere to the glass panes
Implementation Method 4
During the melting procedure, gaseous inclusions are normally formed, which causes the side seal material to expand, and possibly foam as the gaseous inclusions outgas
Data Source
Figure 1A~1B
Figure 1C
Figure 2A~2C
AI summary
The present disclosure relates to a vacuum insulated glazing (VIG) unit and the method for producing such. Furthermore, the present disclosure relates to a window comprising a VIG unit enclosed in a frame.