Above left: After the lumber has been separated, an employee can inspect the timber manually Above right: After the Tongloader®
and the layer formation, the sawn timber reaches the multiple cross-cut saw from Kallfass, which consists of five saw aggregates
“We had enough space for the planning and for the system, so we optimised the process. A great reference project has been created,” said Mr Goldhahn. His colleague Matthias Link, responsible for sales at Kallfass added: “All the responsible people, such as electricians and locksmiths, were involved in the project right from the start. That made the co-ordination much easier.” Robeta Holz built a new hall for the Kallfass system and the assembly work started on September 6, 2022. In January this year the trial operation began. As mentioned, the new restacking equipment is intended for dry goods. However, Robeta Holz can also use this equipment for fresh sawn timber. The system is designed for cross-sections from 16 x 75mm to 125 x 200mm with a length from 0.8 to 6.3m.
CLEAN SEPARATION
The sawn timber feed offers space for several packages. “For a higher output, the system is equipped with two conveyors,” said Mr Link. The hydraulic tilt destacking unit has pneumatic pawls for better stick separation. “The pine is slightly tacky – with the slight push, however, the sticks detach better from the lumber layers,” said Mr Goldhahn. The sticks are collected separately and space- optimised in stanchions.
After separation and downstream of an alignment roller conveyor, the workpieces reach the assessment station, where an employee performs a final quality check. The subsequent Tongloader®
The respective boards drop down through a sorting flap onto a belt below and arrive at two points on a table where they can be removed separately. Subsequently, the good parts move through the Kallfass multiple cross-cut saw. The latter is equipped with five saw aggregates – four of which can be positioned automatically.
ADJUSTABLE MAGAZINES The stacker has a capacity of up to 12 layers per minute. Kallfass has further strengthened this stacker for large wood dimensions. The system has eight double magazines for stacking sticks and sticks being disposed of. “The magazines can be positioned automatically,” explained Mr Link. “This also allows more sticks from a magazine to be placed on the sawn timber layers if required. The motorised adjustment allows the sticks to be positioned closer to the cutting edge. The minimum distance corresponds to a stick width plus 10mm. We have also equipped the existing sorting system with these new stick magazines.”
The finished packages arrive at the Kallfass automatic foiling station.
“This station can also be equipped with unfolded film up to 3.6m wide,” said Mr Link. The wrapped packages then enter the Fromm package press with two squared timber magazines, and are strapped and transported out of the hall through a high-speed door. The parcels are transferred to the pick-up point for the stacker via an angular transfer device.
“Kallfass has done a very good job,” said Mr Rockel. “The co-operation was impeccable – the handling of the installation was also smooth due to the good planning. We can now respond to customer requests much faster and have brought the working hours back to a normal level. The system is operated by three employees and one forklift operator. The output of the system is very high, consequently requiring only a single-shift operation. I am happy every day about the successful project.” ■
*Text and images: Martina Nöstler, Holzkurier
cycles the boards
and planks – regardless of the cross-section – onto the downstream chain conveyor at a rate of up to 120 cycles per minute. The Tongloader® device.
is equipped with an anti-twist “This ensures that cross-sections that are
approximately square are not transported on edge,” said Mr Goldhahn.
The workpieces pass through the Brookhuis moisture measurement system in a transverse run-through. “Pieces that don’t fit are ejected, as are the rejects,” said Mr Link.
Above: The stacking unit is equipped with eight double magazines – these can be moved and positioned exactly at the cutting edge
www.ttjonline.com | March/April 2024 | TTJ
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