Microwave Cork Pre-Expansion Without Foreign Substances
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Solution Overview
Problem
Existing methods for expanding cork often require external substances like water or organic solvents, limiting the potential for volumetric expansion and specific weight reduction without compromising the cork's properties.
Innovation Solution
A process involving microwave radiation is used to expand cork in three stages: dosing, expansion, and discharge, with controlled moisture and varying radiation power and time, allowing for continuous or non-continuous operation, without the use of foreign substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If water or organic solvents are used for cork expansion, then the cork can be expanded, but foreign substances are introduced into the cork system
Solution Approach 1:
The invention extracts and eliminates the need for foreign expansion substances (water, organic solvents) from the cork expansion process. By using microwave radiation alone, the method achieves cork expansion without introducing any external chemical substances, thereby removing the harmful factor of foreign substance contamination while maintaining the desired volumetric expansion effect.
Solution Approach 2:
The cork material itself serves as the expanding agent through its natural cellular structure. The microwave energy activates the cork's inherent properties (cellular structure, natural moisture content) to achieve expansion without requiring external substances. The cork's own structure and composition are utilized to accomplish the expansion function.
2Volume of moving object
If conventional expansion methods are used, then cork expansion is achieved, but the specific weight reduction is limited
Solution Approach 1:
The microwave radiation induces phase transitions in the cork's internal moisture and cellular structure, causing rapid vaporization and expansion of the cellular cavities. This phase change mechanism enables greater volumetric expansion (40-85%) compared to conventional methods, which directly results in more significant specific weight reduction while maintaining cork integrity.
Solution Approach 2:
The microwave radiation generates thermal energy that causes thermal expansion of the cork material and its cellular structure. The heated cork cells expand uniformly in all directions, achieving the desired volumetric increase and corresponding specific weight reduction without compromising the material's mechanical properties.
3Object-generated harmful factors
If microwave radiation is applied for sterilization only, then cleaning is achieved, but volumetric expansion is not obtained
Solution Approach 1:
The microwave radiation process performs multiple functions simultaneously: it sterilizes the cork by eliminating contaminants while also achieving volumetric expansion. This multi-functional approach combines the cleaning effect with the expansion effect in a single treatment step, making the process more efficient and eliminating the need for separate sterilization and expansion operations.
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
The process achieves volumetric expansion of cork by 40% to 85%, reducing its specific weight and increasing its yield and economic value, making it suitable for standard industrial processes.
Implementation Method 1
A process consisting in submitting cork to microwave radiation, in order to promote its expansion
Implementation Method 2
The expansion stage should ensure the contact of the product to the action of the microwave radiation
Data Source
Figure 1~2
Figure 3~4
AI summary
This invention describes a process of pre-expansion by submission to microwave radiation, capable of promoting cork expansion without using foreign substances to the cork system. The expansion achieved by this pre-expansion process shows values that can range between 40% and 85%. The expansion of cork by this pre-expansion process by submission to microwave radiation is achieved in any cork material independently of its shape, origin, quality or pre-treatments already performed, namely, falca cork, virgin or reproduction cork, cork planks, cork residues (resulting from stopper production or cork plank transformation), grinded cork, granulated cork or cork powder, any of them boiled or not boiled, resulting a new cork material with improved properties. The present invention also presents the modifications of the new cork material particularly through the volumetric increase after treatment.