Device and Method for Defibration of Wood

A device for mechanical defibration of wood, comprising a defibration surface for kneading of wood raw material and loosening of fibers, said defibration surface comprising grinding grits made up of hard particles, fixed to a metal base surface by a fixing method, and positioned within a predetermined distance from each other on the metal base surface, so that the grinding grits form a regular defibration surface that is capable of effecting pressure pulses on wood as the defibration surface contacts and moves over the wood.

A method for mechanical defibration of wood, in which wood raw material is kneaded and fibers are loosened by means of a moving defibration surface that is in contact with the wood and formed on a metal base surface, wherein grinding grits made up of hard particles and fixed to the metal base surface by a fixing method are positioned within a determined distance from each other on the metal base surface, so that the grits form a regular defibration surface, wherein regular pressure pulses are effected on the wood by the defibration surface moving over the wood in contact therewith.