Apparatus for the resharpening of two-dimensionally acting knife sets for flaking machines, especially for wood flaking machines

摘要

The invention relates to the resharpening of two-dimensionally acting knife sets in knife rims as they are used for the industrial production of wood flakes from long logs and wood cut to length. Each knife set consists of a knife plate provided with a cutting edge and of several scoring organs whose scoring blades are tightly linked to the knife plate according to the invention. After having advanced all knife sets their resharpening is done in a first phase by means of a grinding drum provided with ring grooves while the knife rim is rotating slowly. In a second grinding phase the cutting edges are touched by the grinding drum which moves slightly in axial direction and for that purpose the knife rim is arrested intermittently. During this phase the residues remaining on the cutting edges and at the scoring organs in the area of the ring grooves are ground off. Due to the present invention it is possible to resharpen the knife rims inside of the flaker via an automatic programmed control without loss of production and without the assistance of maintenance personnel so that the flaking operation is not interrupted and the knife sets are always perfectly sharp.