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Cutting the wood

The wild tree becomes the tamed lath

The wood grows in central Germany. The sawmill transforms raw trunks into smooth laths: cutting, planing, and trimming.

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Hangbird mit gehobelten Latten

Cutting the logs and drying

First, a gate saw cuts the trunks into planks: Several parallel saw blades produce several planks in one process. Then, the wood can be stacked with gaps between planks and dries for 1 to 2 years. Beech wood is steamed like in a pressure cooker to improve its mechanical properties.

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The dried planks are rough and flawy and have still parts of the bark. To reduce offcuts, each plank is assessed visually. Using a joystick and laser markings, the saw is programmed to cut long laths out of the planks.

Hangbird needs the laths in different lengths: the saw mill recognises the length of each raw lath automatically and cuts the desired length, thereby optimising the distribution of lengths. The laths travel rapidly over a long conveyor belt and are sorted into heaps automatically depending on their length.

The result are raw laths. Strong dents of the saw teeth are visible.

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Stapel mit roh gesägten Latten vor dem Hobeln

The dried planks are rough and flawy and have still parts of the bark. To reduce offcuts, each plank is assessed visually. Using a joystick and laser markings, the saw is programmed to cut long laths out of the planks.

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Hangbird needs the laths in different lengths: the saw mill recognises the length of each raw lath automatically and cuts the desired length, thereby optimising the distribution of lengths. The laths travel rapidly over a long conveyor belt and are sorted into heaps automatically depending on their length.

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The result are raw laths. Strong dents of the saw teeth are visible.

Stapel mit roh gesägten Latten vor dem Hobeln

Planing and chamfering

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Latten in der Hobelmaschine

The planer – as big as a small house – processes all four sides and chamfers all four edges.

Trimming the laths

In the last step, the laths are checked, and defects are marked with a fluorescent colour: the automatic saw recognises them automatically and the lath is cut to next suitable length.

No sparks, but blocks fly!

The offcuts are used for wood chips and used as a sustainable energy source – in parts for the drying and steaming of the wood.

Or should Hangbird produce building blocks too?

Stapeln der gehobelten Latten

Ready for the workshop!

To wood working