METHOD FOR REPROCESSING OF ROUND TIMBER HAVING A PITH ROT Russian patent published in 2005 - IPC

FIELD: forest industry, applicable in production of sawn timber.

SUBSTANCE: the method consists in fixation of timber by the sound peripheral zone, division of timber into parts in the longitudinal direction, determination of the shape and parameters of the pithy layer, formation of the processing surface of the same shape and conicity in length, turning of the parts relative to each another by 180 deg. in the vertical and horizontal planes, joining of the surfaces of processing and fastening together of the parts. The round timber having a pith rot is divided in the longitudinal direction with obtaining of three-edged cants and sectors including the affected sections. Then, the bark and the low-quality pitch layer are removed simultaneously, forming of the processing surfaces of the same shape and conicity in length, the adjacent parts are turned relative to each other by 180 deg. in the horizontal plane, the processing surfaces are joined and fastened together. The sectors are divided into parts in the longitudinal direction in parallel with the generating line, then the parts are turned relative to each other by 180 deg. in the vertical and horizontal planes, the processing surfaces are joined and fastened together. After drying the obtained parts may be bonded together, and after hardening the division into blanks is performed. The millwork may be done. The obtained parts may be graded to the geometrical parameters or to the quality characteristics.

EFFECT: enhanced quality of reprocessing of materials having a pith rot.

5 cl, 12 dwg