Hardwood Sawing Process for Increasing Recovery and Improving Production

A hardwood sawmill design to increase lumber recovery and improve production is proposed. The process described is intended for the production of hardwood squares and dowel stock; however, the principles are applicable to the manufacture of other special products and to hardwood lumber production in general. Research included several methods of manufacturing hardwood squares from four different log diameters. The live-sawing method, followed by careful edging, can increase lumber recovery by more than 20 percent. The manufacturing rate for short, small-diameter logs can be more than doubled by a thoughtfully designed sawmill system in comparison with a conventional bolter operation. Two relatively simply sawmill systems will substantially increase lumber recovery and improve production. One of these sawmills is a highly specialized operation that was successfully completed in 1973. The proposed second sawmill is more conventional and adaptable to a variety of applications. The discussion includes a flexible sawing process that uses a band headsaw tilted 15 degrees and a small 44-inch twin band resaw.

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