he Grancutter utilizes a cam-driven swinging shaft rather than a rotating blade. The patented system cuts the sprues and runners between teeth on the swinging Shaft and teeth on a stationary blade mounted on the interior frame of the Grancutter. (See fig. 3).
When the swinging press cutter converges on the stationary cutter, the sprues and runners are cut in the "bite" of the teeth, and the granules are ejected from between the teeth of the cutters. The press cutter swings open again, and the next sprues and runners fall between the teeth to be cut. (See sequence of photos). There are no trapped pieces of sprues and runners, thus no dust. There is also very little static electricity or heat produced

In the case of cylindrical sprues and runners(See fig.4), the first blade of the swinging press cutter cuts the bottom half, then the sprue or runner is cut lengthwise by the second blade. The top half of the sprue or runner, as shown in fig.5, remains above the blades. It fall between the teeth when the press cutter swings open for the next " bite", and is then cut into granules. The result is that the sprues and runners are thoroughly and reliably cut, not shaved into dust or left uncut.

With conventional granulators that are equipped with a screen, sprues and runners that are smaller than the mesh can drop into the material tank without being cut. Miscuts can occur. With the Grancutter system, however, because pieces of sprues and runners remain above the blades if they are uncut, they cannot fall into the material tank without being granulated. Furthermore, the sprues and runners are cut at a right angle to the swinging shaft and are discharged between the teeth, Therefore, there is nearly no erroneous cutting.