METHOD OF MAKING BOARDS AND PRESSED ARTICLES Russian patent published in 1995 - IPC

FIELD: wood-working industry. SUBSTANCE: processing of vegetable materials is exercised by saturated vapor at the temperature of 170-200 C in the steaming-ground plant where the material is ground into fiber. The obtained mass is separated from the steam and gas mixture in the cyclone, is stabilized in humidity. At the same time the mass is shifted in the screw conveyers disposed inside the closed-type warmed up housings and equipped by suction pipes for extracting the steam and gas mixture. The mixture is pressed in the extrusion press. The slabs of the press are heated in the input, then they have a neutral zone. The slabs are cooled in the output. The whole process is carried out in the space separated from the environment. EFFECT: enhanced quality of boards, reduced labour intensity of their production and reduced material expenditure. 2 cl