A Cutting Device for Laboratory-Scale Veneer Studies

Described is a technique for small-scale veneer cutting for controlled laboratory use based on a modification of a standard Izod-Charpy impact testing machine. This method uses the principle of the impact test to the extent that power is supplied by the gravitational swing of a weighted pendulum arm and that energy consumption is measured by retardation of the pendulum. In the veneer-cutting machine, a rigidly mounted knife intercepts the path of a small block of wood which is attached to the swinging pendulum, slicing off a layer of veneer as the block swings past the knife. The energy required in cutting the veneer is thus measurable. The impact tester includes a knife-nosebar assembly which is fully adjustable for such variables as vertical and horizontal nosebar opening, knife angle, and thickness of veneer. Advantages in the use of this equipment are: 1) convenience of working with small blocks of wood, 2) specimens are more closely matched; 3) temperature, moisture content, cutting variables, and other conditions can be controlled more uniformly within a single specimen and more closely among different tests; and 4) variations in the design of the knife and nosebar can be used in the tests.

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