Frameless Window Adhesive Bonding for Shape Variation Compensation
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Solution Overview
Problem
Existing frameless window manufacturing processes struggle to effectively compensate for shape variations in glass panes due to the need for high precision and short manufacturing times, limiting the use of holders with wide slots that can accommodate these variations.
Innovation Solution
The use of a two-adhesive system where a high elastic modulus, fast-curing first adhesive is applied to the ends of wide slots in holders to secure the glass pane, followed by a lower elastic modulus, longer-curing second adhesive to complete the structural union, allowing for quick assembly and compensation of shape variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If holders with wide slots are used to compensate for shape variations in glass panes, then the adaptability to shape variations is improved, but the manufacturing precision deteriorates because the slot width exceeds the pane thickness
Solution Approach 1:
The adhesive bonding process is segmented into two distinct stages: first applying a positioning adhesive to secure the pane in the holder slot, then filling the remaining slot space with a secondary adhesive. This segmentation allows the holder slot to be wider than the pane thickness while maintaining precise positioning, as the first adhesive provides initial fixation before the second adhesive completes the structural bond.
Solution Approach 2:
The first adhesive is applied preliminarily to establish correct positioning of the glass pane within the holder slot before the second adhesive is applied. This preliminary action ensures that even with wide slots exceeding pane thickness, the pane is securely positioned and cannot shift during the subsequent filling process, thereby maintaining manufacturing precision while accommodating shape variations.
2Device complexity
If a single adhesive is used to fill the entire slot, then the device complexity is reduced, but the manufacturing precision deteriorates because the adhesive cannot simultaneously provide quick positioning and complete structural union
Solution Approach 1:
Different regions of the slot receive different adhesives with different properties: the first adhesive (applied locally near the pane) has high elastic modulus and fast cure time for immediate positioning, while the second adhesive (filling the remaining slot space) has lower elastic modulus and longer cure time for complete structural union. This local differentiation of adhesive properties enables both quick positioning and complete bonding without requiring a single complex adhesive system.
3Productivity
If high elastic modulus adhesive with short cure time is used, then the productivity is improved due to faster assembly, but the adaptability deteriorates because the adhesive cannot accommodate shape variations in wide slots
Solution Approach 1:
The adhesive system is segmented into two functional components: the first adhesive provides rapid positioning with high elastic modulus and short cure time to enable fast assembly, while the second adhesive provides adaptability to shape variations by filling the remaining slot space with lower elastic modulus and longer cure time. This segmentation allows the system to achieve both high productivity through fast initial positioning and high adaptability through subsequent flexible filling.
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 enables rapid and precise assembly of frameless windows by maintaining the glass pane's position during slot filling, optimizing manufacturing time and cost while accommodating wider slots than the pane's thickness.
Implementation Method 1
the lower edge of the pane is bonded in position in the slot by a first adhesive applied locally to part of the slot
Implementation Method 2
a second adhesive applied to the slot adjacent the first adhesive
Data Source
AI summary
Frameless window which comprises a transparent pane, the lower edge of which is fixed in the slot of one or more holders by at least one layer of adhesive and is joined to the walls of the slot of the holders by at least two layers of a first adhesive applied close to the lateral ends of the slot, wherein at least one layer of a second adhesive is applied in the slot between the layers of the first adhesive. A process for manufacturing the window is also disclosed.