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7. High frequency and microwaves
When you need to quickly dry an adhesive applied between solid parts, the best technique is high frequency.
7.1 Principle
When a piece of wood coated with water-based glue is subjected to a high-frequency (3 to 300 megahertz) or very high-frequency (microwave = 300 to 300,000 MHz) alternating electric field, the polar water atoms and cellulose molecules in the wood vibrate at the same high frequency, causing the material to heat up rapidly.
SCROLL TO TOP7.2 Expression of power loss and heating time
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High frequency and microwaves
Door manufacturing
Standardization
French Standards Association (AFNOR)
http://www.afnor.org
- Wood-based panels – Determination of formaldehyde content – Extraction method, also known as the perforator method. - NF EN 120 - 10-92
- Classification des colles thermoplastiques pour bois à usages non structuraux. - NF EN 204 - 04-02
- Thin, long and oriented strand board (OSB) – Definitions, classification and requirements....
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Machine manufacturers
Siempelkamp (Germany) http://www.siempelkamp.com
Dieffenbacher (Germany) http://www.dieffenbacher.de
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