58 | Features: Kallfass
DUBOT REMOVES BOTTLENECK
The Dubot Bois & Scieries sawmill in Saint Avit, France has installed its fourth Kallfass handling system
The Dubot Bois & Scieries sawmill in Saint Avit, France, has been a customer of Kallfass for more than 25 years.
Dubot again turned to Kallfass’s expertise when planning a new sorting and stacking system to improve performance and quality of operations.
In 2024, Dubot ordered its fourth system from Kallfass. The sawmiller said the existing system behind its circular saw line from Kallfass had become outdated. It only had twelve boxes for sorting, which limited the performance of the saw line.
For this reason, Dubot decided to invest in a new sorting and stacking system, knowing that Kallfass would be able to rebuild the new main product line in place of the old one. As part of the project, Kallfass also supplied a Microtec wane scanner and a trimmer to ensure that Dubot could produce a high quality of sawn timber.
The Kallfass delivery starts from the transverse take-off of the main product
behind the sawing line. The sorting and stacking system is designed for timber lengths of 2.5 to 7.3m and a maximum cross- section of 63 x 260mm. A Tongloader cycles 80 pieces per minute onto an assessment chain conveyor with a touch screen interface. The assessment chain conveyor facilitates the inspection of both timber faces.
The timber then passes through the wane
scanner. Depending on the result, it is then possible to trim the sawn timber using the Kallfass trimmer. This trimmer uses ten saw aggregates. Finally, the sawn timber is sorted into one of the 22 inclined boxes. Kallfass has integrated this area of the sorting plant into the existing building. While the sorting system was being built, Dubot extended the hall to accommodate the new stacking system.
After emptying the boxes, the wood is transferred to a transport trolley and afterwards to the step separator and unscrambler.
Subsequently, layers of timber are created and the Kallfass multiple cross-cut saw is called into action, equipped with five saw aggregates, four of which can be positioned automatically. The mechanisation transfers the sawn timber layers to the stacker performing with an output of up to ten layers per minute. The stacker is equipped with eight single- stack magazines into which the sticks are placed.
The finished sawn timber stacks are transported onto a cross conveyor. The forklift operator either removes the timber stacks or feeds them to the existing strapping system, which Kallfass has integrated into the control system.
This area is now fully automated; employee involvement is unnecessary, and wood package data transfers automatically to the strapping system.
This article is reproduced from a feature originally appearing in the Holzkurier
The stacking system is housed in a new hall, parallel to the box sorting system. The picture shows the generously dimensioned package chain conveyor. Photo: Kallfass
TTJ | Summer 2026 |
www.ttjonline.com
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