METHOD OF IMPREGNATION OF HALF-FINISHED WOOD PRODUCT Russian patent published in 2003 - IPC

FIELD: woodworking industry, particularly, methods of impregnation of half-finished wood products with protective or ornamental compositions with use of acoustic energy. SUBSTANCE: method includes formation of layer of impregnating fluid on surface of half-finished wood product and excitation of acoustic vibrations with help of acoustic device installed so that its radiating surface is located in layer of impregnating fluid with gap relative to surface of half-finished wood product. It is sound practice, in impregnation of half-finished wood product from surface oriented across wood fibers, to install acoustic device so that vector of vibration velocity of its radiating surface makes up angle of 0 deg. With normal to surface of half-finished product. In impregnation of wood half-finished product from surface oriented along wood fibers, it is expedient to install acoustic device so that vector of vibration velocity of acoustic device radiating surface makes up angle β, with normal to half-finished product surface. Value of angle β, is determined by relationship where Vi.f. is longitudinal acoustic wave velocity in impregnating fluid, and Vp is longitudinal acoustic wave velocity in half-finished wood product in direction along wood fibers. It is also expedient to preset frequency and amplitude of vibrating displacement of radiating surface of acoustic device on base of conditions of occurrence of acoustic cavitation in fluid used for impregnation. EFFECT: higher efficiency of method. 4 cl