Veneer lathe knife assembly
AssigneeRaute Oyj
InventorJussi Puranen
Life of this patent
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Abstract
A veneer lathe knife assembly includes a lower portion supporting a veneer cutting knife, and a upper portion supporting a backing nose bar. The upper portion includes adjustment screws, for example, for adjusting a position of the nose bar in the upper portion of the assembly. To perform a fine adjustment of the knife gap formed between the cutting knife and the nose bar, the adjustment screws are individually temperature controlled to compensate for a thermal expansion of the adjustment screws, thus maintaining the knife gap along the length of the knife assembly.
Claims16
A veneer lathe knife assembly, comprising:
- a lower portion supporting a veneer cutting knife, and
- an upper portion supporting a nose bar,
- said upper portion including adjustment means for positioning the nose bar in the upper portion,
- wherein said adjustment means include means for controlling a temperature of the adjustment means.
A veneer lathe knife assembly, comprising:
- a cutting element;
- a nose bar arranged opposing the cutting element;
- a plurality of adjustment screws coupled to the nose bar, said plurality of adjustment screws being arranged to control a knife gap between the cutting element and the nose bar;
- and
- means for controlling a thermal expansion of the plurality of adjustment screws in a direction perpendicular to the cutting element.
A method for controlling a quality of a veneer produced by a veneer lathe knife assembly, the method comprising:
- observing a knife gap along a length of the knife assembly;
- controlling a temperature of each of a plurality of adjustment screws arranged to establish the knife gap,
- wherein the knife gap is adjusted along the length of the knife assembly and the quality of the veneer is controlled by said step of controlling the temperature.
Dependencies are inferred from the claim text.