Vacuum Insulation Panel Manufacturing Using Room-Temperature Mechanical Compression
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Solution Overview
Problem
Existing methods for manufacturing vacuum insulation panels with fiber cores require high energy due to thermal processing, leading to increased costs and potential damage during handling, while also facing challenges with gas-tightness and thermal bridges in foil sleeves.
Innovation Solution
A method involving mechanical compression of fiber core blanks at room temperature between cover elements, maintaining compression until the foil sleeve is sealed, and evacuating to a low pressure, which reduces energy consumption and enhances structural stability without thermal impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If thermal processing is used to compress fiber core blanks, then the core achieves dimensional stability, but energy consumption increases significantly
Solution Approach 1:
The patent replaces thermal processing with mechanical compression to achieve core blank densification. Instead of using heat to compress the fibers, a mechanical compression device applies direct mechanical force to compress the fiber core blank to the desired density and dimensional stability, eliminating the need for thermal energy input while achieving the same structural outcome.
Solution Approach 2:
The patent changes the processing parameter from temperature-based (thermal) to force-based (mechanical). By adjusting compression force, pressure, and duration rather than temperature, the process achieves core stabilization with significantly reduced energy consumption, as mechanical work can be applied more efficiently than thermal processing for this specific densification task.
2Reliability
If metal foil sleeves are used, then gas-tightness and mechanical resistance are improved, but thermal bridges increase and processing complexity increases
Solution Approach 1:
The patent employs composite foil sleeve structures combining metal and plastic layers. The metal layer provides gas-tightness and mechanical strength, while the plastic layer acts as a thermal barrier to reduce thermal bridges. This composite approach allows the system to simultaneously achieve the gas-tightness benefits of metal foils while mitigating their high thermal conductivity through the insulating plastic layer.
3Ease of manufacture
If plastic foil sleeves are used, then ease of sealing is improved, but gas-tightness deteriorates over time
Solution Approach 1:
The patent uses composite foil sleeves with plastic layers for easy sealing through welding or heat sealing, combined with metal layers that provide long-term gas-tightness. The plastic portion allows for simple sealing processes while the metal portion ensures durable gas barrier properties that prevent permeation over time, combining the advantages of both material types.
Solution Approach 2:
The patent applies different materials to different functional requirements within the foil sleeve structure. The sealing regions utilize plastic materials for ease of welding and sealing, while the body portions utilize metal materials for gas-tightness. This local differentiation of material properties optimizes both sealing ease and long-term gas barrier performance.
4Stability of the object's composition
If binder-free mineral wool is thermally compressed, then core stability is achieved, but processing time and energy consumption increase
Solution Approach 1:
The patent replaces thermal compression with mechanical compression for binder-free mineral wool cores. The mechanical compression device directly compresses the fiber material to the target density without requiring heating, cooling, or prolonged thermal processing cycles. This mechanical approach achieves core stability rapidly, significantly reducing processing time while eliminating thermal energy consumption.
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 energy requirements, minimizes production costs, and maintains excellent insulating properties while improving the panels' durability and gas-tightness, allowing for efficient and cost-effective manufacturing of vacuum insulation panels.
Implementation Method 1
evacuating a foil sleeve enveloping the core up to a pressure of ≤ 1 mbar
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method for manufacturing vacuum insulation panels (1) with a fiber core (3), comprising the steps of: providing a core blank of fibers, compressing the core blank to a predetermined final thickness for forming the core, evacuating a foil sleeve (2, 2') enclosing the core up to a pressure of < 1 mbar, and sealing the foil sleeve. The method according to the invention is characterized by the fact that, in the compression step, the core blank is arranged between two cover elements and is mechanically compressed therebetween, that the core is kept under compression pressure until the foil sleeve is sealed, and that the compression step is performed at the place of manufacture at room temperature without thermal impact. Thus, a method for manufacturing vacuum insulation panels with a fiber core can be improved such that it can be performed with reduced energy requirement and yet the insulating effect of the vacuum insulation panels does not suffer therefrom.