Multiple-Flitch Method for Thick Slicing

Edge fracturing at the entrance and exit of the knife has been a problem with the thick-slicing process. The fracturing is due mainly to the large forces parallel to the cutting direction, resulting from high compression. During recent cutting studies using a modified metal milling machine, this problem was minimized by using a back-up block. Slices 1-inch thick were cut from Douglas-fir, red oak, and bigtooth aspen. Four blocks were cut as a group. The results showed that cutting continued from block to block with very little entrance or exit effect for all three species. The continuous cutting method is also advantageous since there are no acceleration or deceleration cycles of the slicer, and thus a lower velocity still produces high volume.

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