Slicing / Peeling

Heavy machinery for finest precision

Here at the latest the wheat is separated from the chaff. Where hard material is sliced into finest sheets with tremendous pressure, one does not only need heavy machinery but especially experienced staff who ensure the highest precision with full concentration and dedication. For the actual slicing operation, the flitches are planed on one or […]

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Here at the latest the wheat is separated from the chaff. Where hard material is sliced into finest sheets with tremendous pressure, one does not only need heavy machinery but especially experienced staff who ensure the highest precision with full concentration and dedication.

For the actual slicing operation, the flitches are planed on one or both sides to ensure that the flitch lies perfectly flat on the slicing bed.

Differentiation is generally made between two types of veneer slicing machines:

  • Slicing machine for horizontal or vertical cutting
  • Peeling machine for rotary cutting, eccentric peeling or stay-log peeling

 

Different veneer pictures are achieved depending on the machine and slicing method used.

Of decisive importance are exact knife and pressure bar settings to an accuracy of 0.1 mm. This is the only way to ensure perfect quality veneers. It goes without saying that the knife always has to have an extreme sharpness and needs to be reground respectively often, depending on the veneer thickness (and, depending on the species, in different grinding angles.)

On modern slicing and peeling machines, the extremely heavy knife is additionally heated, so that the water exuding during slicing operation vaporizes as quickly and uniformly as possible to avoid condensate marks and blue stain. Other possible slicing defects:

  • Scratches: Fine knots (for example in Sycamore), contamination in or on the trunk (grains of sand, little stones) or ingrown metal in the wood (nails, bullets etc.) will chip the cutting edge of the knife and thus cause scratch marks in the veneer leaf. Such chips are either groundout manually 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”.

 

After slicing, the still warm and damp veneer sheets need to be dried individually.


Preparation

Here, the veneer picture is determined

Cooking

... makes the wood smooth and determines the color

Drying

The perfect residual moisture counts

Clipping

We cut off what you cannot use

Costing

Which species? Which quality? And: which price?

Measuring

Precision and documentation

Methods of Cutting

The cut decides the veneer picture