Slicing

 

With particular technology, the Logs are sliced long-ways or peeled circularly so it results veneers as thin as 0.07 mm- 5mm. Of decisive importance for the quality of the slicing are exact knife and pressure bar settings to an accuracy of 0.01 mm. This is the only way to ensure perfect quality slicing.

 

Just as important to ensure optimal quality slicing is the grinding of the knives at different angles (which can vary from one species of wood to the next). A heating system, installed on modern slicing and peeling machines is to dry the water exuding during slicing operation as well as moisture stemming from condensation as quickly and uniformly as possible to avoid blue stain.

Possible slicing defects:

  • Scratches: These occur as a result of fine knots, contamination in or on the trunk (grains of sand, little stones) or ingrown metal in the wood (nails, etc.). These will chip the cutting edge of the knife and thus cause scratch marks in the veneer leaf. Such chips are either groundout by using a sandstone or the knife will have to be changed depending on the depth of the chip.
  • Deviating thicknesses: These occur as a result of the log being clamped wrongly in the machine or wrong setting of the pressure bar. Another cause is the flitch not lying perfectly flat on the slicing bed.
  • Chatter marks: Regular ribs of different thickness which run across part of the veneer sheet. Causes are the same as those mentioned under "deviating thicknesses".

 

Various slicing methods (showed below) will produce various cutting pattern.

Flat sliced
Quarter sliced
True quarter sliced
Crotch
Rotary cut
Half round cut
Half round back cut
Rift cut
Cut into thirds