a woodworking machine that makes ties by sawing logs longitudinally. Such machines may be equipped with circular saws or band saws.
In tie-sawing machines with circular saws, the feed motion may be accomplished by the moving log, which is fastened on a special carriage, or by the rotating saw, in which case the log being cut is held by clamps in a fixed position. In tie-sawing machines with band saws, a securely fastened log is fed to the saw. Circular-saw machines may have one or two saws; the upper, supplementary saw is mounted in the same vertical plane as the lower, primary one. Saw blades 4–6 mm thick with diameters of 1–1.6 m are used on circular-saw machines; the saw blades of band-saw machines are approximately 1.2 mm thick. Both types of machines make longitudinal cuts, and the short cutting edges of the saw teeth make the end cuts; the sawdust that forms is waste.
In some band-saw machines, the movement of the band saw is parallel to the grain of the log, and the short cutting edge cuts along the grain; instead of sawdust, a shaved strip is formed that is marketable as packing or for the production of Fibrolit.
N. K. IAKUNIN