| 摘要 |
A grinding head of a grinder is provided with a knife assembly that includes a knife holder with a number of arms, each having a knife insert slot, for receiving a matching number of knife inserts. The knife inserts have a blade or cutting edge and a bottom edge. The bottom edge, rather than being a straight edge, is shaped to define a pair of bearing portions that fit within the slot of the knife holder arm and allow the knife insert to be firmly retained in the slot. A recessed area is located between the bearing portions. The recessed area accommodates any imperfections in the floor of the insert slot, and provides a void area within which any material contained within the slot can be received when the knife insert is engaged within the slot. |
