Vacuum Insulation Body Folded-Edge Sealing for Reliable Core Filling
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Solution Overview
Problem
The existing methods for producing vacuum insulating bodies face challenges in reliably sealing the opening of the envelope in a vacuum-tight manner, particularly due to the lack of a defined area for attaching or placing a cover film.
Innovation Solution
The method involves folding the edge region of the cover inward and then outward to create a flat sealing surface that can be connected to a vacuum-tight cover film, using an auxiliary structure to ensure a reliable and vacuum-tight seal, and optionally using high-barrier films or aluminum composite films for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an opening is provided in the cover for filling with core material, then the filling process can be carried out, but the opening cannot be sealed in a vacuum-tight manner due to lack of defined sealing area
Solution Approach 1:
The cover edge is segmented into multiple folded portions (first folded portion, second folded portion, third folded portion) that create distinct functional zones: a reduced opening area for controlled filling, and a defined flat sealing surface for reliable vacuum-tight sealing with the cover film.
Solution Approach 2:
The cover edge is pre-folded into specific configurations before the filling and sealing operations. The inward folding creates the reduced opening and flat sealing surface in advance, preparing the structure for subsequent vacuum-tight sealing with the cover film.
2Reliability
If the cover edge is folded to create a sealing surface, then vacuum-tight sealing is achieved, but the structure becomes more complex
Solution Approach 1:
The cover is constructed as a flexible film structure that can be folded and shaped to create the sealing surface. This flexible film approach allows the complex folded configuration to be formed from a single continuous material without rigid components or additional fastening elements.
3Manufacturing precision
If the opening is reduced by folding, then a defined sealing area is created, but the filling opening size is reduced
Solution Approach 1:
The cover edge is segmented into multiple folded portions (first folded portion, second folded portion, third folded portion) that create distinct functional zones: a reduced opening area for controlled filling, and a defined flat sealing surface for reliable vacuum-tight sealing with the cover film.
Data Source
Figure 1~2
AI summary
The invention relates to a vacuum insulation body, comprising a vacuum-tight casing, which encloses an evacuated region, wherein a core material is arranged in the evacuated region, wherein the casing has an opening for filling the casing with the core material, which opening is covered by a vacuum-tight covering film, wherein the casing is folded inward in the edge region projecting toward the opening, the opening therefore being reduced, and then is folded outward again, wherein the region folded outward and a region of the covering film are connected to each other peripherally in a vacuum-tight manner.