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Machine sorting
Dynagrade guarantees optimal quality
In principle Dynagrade has the same function as when you knock the end of a piece of wood with a hammer in order to assess the quality, only in a more advanced way:- Dynagrade measures the length, evaluates the knots and with it the strength of the lamellas. The actual evaluation and grading is done by a spring affected “hammer” that knocks at the end after which the Dynagrade measures the vibrations, all of which takes only three tenths of a second.
- In a glulam beam a sixth and at least two lamellas in each side must always have status of outer lamellas. This means that if the beam consists of for instance, 17 lamellas, three in each side must be outer lamellas and there are greater demands to their strength than for the middle lamellas. Alternatively all the lamellas must be of the same class (as the outer lamellas).
The new machine automatically grades the lamellas and the evaluation of the quality decides which lamellas are used as outer lamellas.
Sorting visually
After this all lamellas must be visually sorted. They are all controlled for knots and others faults in the ends, where the finger joints are going to be. The cutting is done automatically. In addition to this the outer lamellas (those that will be visible in the finished beam) are controlled for appearance - they have already been approved for the strength. This evaluation is done with a scanner at Lilleheden in Hirtshals whereas it is done manually at Lilleheden in Bredebro.
Dynagrade
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