Abstract:

This paper describes that the production tests of domestic laminated boards from small-diameter(14～24 cm)and low-grade(grade 3)oak logs using the techniques of SDR and convention,respectively,according to the principle of the internal connection and impact among sawing、drying and further processing solid products, as well as related theoretical basis. Living sawing increased the lumber recovery factor and production rate and effectively controlled the drying deformation of flitch. The results of production tests indicated that the technique of SDR increased the wood utilizing percent from log to laminated board by 5.41%, compared to the technique of convention, under the condition of the planed lumber grade yield being not decreased.

Key words: live-sawing, lumber recovery factor, decreased crook