At Koskisen’s mill in Järvelä lies Finland’s largest individual log sorting station. An average of 18,000 logs are processed there each day.
Jarkko Nummelin, head of wood reception and sorting, has worked at Koskisen for 15 years. He knows everything there is to know about logs and their handling.
Some of the softwood’s logs are full-length logs, but the majority of them have been cut to length. All of the pine, spruce, birch and aspen logs that arrive at Koskisen are processed through a massive log sorting station that runs round the clock.
Mainly the information on the quality and price of the wood is relayed automatically to Koskitukki’s procurement supervisors. If the data provided by the machine on the price of the timber causes later debate, the quality of the timber can be checked from a video.
“The log sorter automatically assesses the quality of each single log based on length, circumference, curviness, sweep and bark thickness. When the necessary information on the log has been gathered it continues to a more than 200-metre-long conveyor, which has 80 separate bins along its length for various grades. Which bin the log is directed into depends on its quality and purpose,” says Nummelin.
The majority of Koskisen’s logs go to the sawmill. Approximately 25 per cent head to the plywood industry and small part is used as pulpwood.
In addition to the cut-to-length station, Koskisen also has the country’s only full-length log station, in which the entire length of the tree can be utilised and cut to length.