New production system for the manufacture of high-quality wood with vertical annual rings

The PrimWood method is a production system for sawing hardwood and softwood timber, and for further processing and refining the dried wood into knot-free boards, components and panels with vertical annual rings. This article presents an idea for a technical realisation of the PrimWood method. The method has in the first place been adapted to the sawing of quantities which correspond to the available volume of hardwood existing in Sweden, but the system is also well suited for softwood. The basis of the production system is that the log is sawn according to the star-sawing pattern in a vertical band saw with a carriage. The carriage is fitted with equipment for rotating and changing the position of the log or log parts in the vertical or horizontal directions in order to make it possible to saw pieces of wood with either a rectangular or a triangular cross-section. After it has been dried by conventional methods, the sawn wood is further processed by cross cutting, jointing, planing and gluing into knot-free components with vertical annual rings. The system seems to be well adapted to the conditions which apply in the small-scale processing of hardwood and softwood, and high-quality products can be produced with a high volume yield