DEVELOPMENT OF WOOD GRINDING 1. GRINDING MODEL

The aim of this study was to develop and test a model expected to be useful in interpretation of stone grinding of wood. Since stone grinding has been in use for about two centuries, it is surprising that some grinding mechanisms still remain undiscovered. The application of an energy balance set-up for the wood and grindstone surfaces, valid for wood grinding under conditions presenting continuity, resulted in a useful model. The theoretical model developed suggests that the ratio of the compression and tension powers, called the power ratio, depends linearly on the specific production. The experimental grinding data tested in this context follow the theoretical model. Hence, it would be a valuable tool in further evaluation of grinding and groundwood data.