FIELD: process engineering.
SUBSTANCE: invention relates to preheating of material laid over continuous circulating moulding mat belt in production of particle boards. For preheating of mat material on one or both sides microwave radiation is introduced therein. Material mat is compacted and hardened after feed into continuously operating extruder at definite pressure and temperature. For heating said mat microwaves in frequency band of 2400-2500 MHz are used. Said microwaves for every surface of said mat are generated in 20-300 microwave generators with 3-50 kW magnetrons each. Used heater is composed of continuous operation through-type furnace. 20-300 microwave generators with 3-50 kW magnetrons are arranged inside the furnace on every side to operate in 2400-2500 MHz frequency band.
EFFECT: higher efficiency of heating.
25 cl, 3 dwg
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|---|---|---|---|
| 0 |
|
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SU1313336A3 |
