What Is High Frequency the Principle of High Frequency Dielectric Heating?

Medium is commonly referred to as an insulator, such as wood, plastics, food, rubber, glass fiber reinforced plastic, glue and water, such as high-frequency heating medium is the dielectric such as wood, plastics, food, rubber, glass fiber reinforced plastic, glue and water, such as high-frequency heating medium is the medium in the high-frequency electric field, under the effect of the electric field, the medium molecules arranged according to the direction of the electric field, due to the high-frequency electric field at breakneck speed changing direction, so the medium material molecules in the position of the original high-speed rotation or vibration, friction between the molecule collisions generate heat, so as to achieve the purpose of heating (see figure). Our company provides joining board of mechanical.

Main feature:

1. The heating speed is fast and the efficiency is high. If the thickness of the workpiece is less than 20mm, the conduction heating time is generally 1min/mm. If the thickness is greater than this thickness, the time will be greatly extended, and the thickness of the workpiece will have a much smaller effect on high-frequency heating. It only takes about two hours to use high-frequency heating, while conduction heating takes five to six days.

2. Uniform heating: The heat is generated from the inside of the object, which can make the object in the electromagnetic field heat up evenly. For example, the heating of the technical wood cube, the entire wooden cube reaches the same temperature inside and outside, which can effectively enhance the curing strength of the glue and improve the product quality.

3. The heating process is easy to control: it will heat when the power is turned on, and the heating will stop when the power is turned off. It can be easily controlled by adjusting the heating time.

4. Biological stimulation: sterilization, food processing, electrotherapy, etc. can be carried out.

5. With heating selectivity: due to different material loss factors under a certain frequency, the absorbed electric field energy is also different. Appropriate frequency selection and targeted heating of a substance in the same electric field can greatly improve heating efficiency and reduce energy consumption. For example, wood plywood can make the glue joint in the same electric field heat up, while wood heats up (see figure).

6. It is suitable for automated production, occupies small space, and low labor intensity.

7. Environmental protection, no boiler, no dust, no smoke, no high-temperature radiation, safety, and health.

The above information is provided by high frequency joining machine manufacturer.