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Cutterblock unit – cutting preparation before sanding
A cutterblock unit machines timber with rotating cutting edges. In planer-sanders it performs the cutting stage before subsequent sanding units refine the surface. This combines planing and sanding in one pass.
Operation and construction
A powered cutterblock removes material as the workpiece passes through. Knife configuration and arrangement depend on the design; reversible knives are one example. Feed, guidance and pressure elements work with the unit to control workpiece transport through the machining zone.
The planing unit performs the intended stock removal. Subsequent abrasive belts process the surface according to the chosen grit sequence. The number and arrangement of working units depend on the production process.
Applications
A typical application is processing glued solid wood panels. The combination is suitable where material is first removed by cutting and a sanded surface is then required.
Application and classification
A cutterblock works with defined cutting edges; a sanding unit works with abrasive grains. Consequently, the number of working units in a planer-sander does not necessarily equal its number of sanding belts. Cutterblock, tooling and machining parameters are selected to suit the material and task.
