What the press says about LINCK

Compact and weightless

The latest „coup“ of Linck: the compact machining centre for small-diameter logs
The first log rotation with two pairs of rollers
– the log floats nearly weightless
Anti-twist device : The feeding chain guides the log safely into the …
… first chipper canter with horizontal tool arrangement
The guiding and positioning units are located between the chipper canters.
Feeding into the second, vertical chipper canter
There is sufficient space available for changing tools despite the short overall length.
The four-sided cant leaving the machine.
The people behind the machine: Martin Bruder, Eric Schultz, Rudolf Pfaff and Manfred Leopold (from left).

Processing of small diameter logs in a tiny space for each space requirement

Availability, dimension accuracy, recovery, quality, durability are the keywords for the new compact machining centre for processing small diameter logs designed and built by the machine manufacturer LINCK. The Holzkurier was in Oberkirch to take a close look at the novelty prior to the LIGNA.

LINCK, Oberkirch/Germany is presenting an absolute novelty at the LIGNA fair in Hannover mid May: an ultra-compact machining centre for processing small diameter logs. On an overall length of less than 9 m, the log is processed on all four sides in one operation for producing four plane surfaces. “We see this innovation primarily as a supplement to our existing range of products,“ says sales and marketing manager Manfred Leopold.

Easy replacement should be possible . One thought was highlighted when developing the new machining centre: It should take up as little space as possible in order to be used in tight situations, especially with replacements. At the same time LINCK didn’t want to give up any advantage of its proven technology: high-quality engineering, dimensional accuracy of lumber and high yield. „With the compact machining centre we can now offer a solution for limited installation space as it occurs frequently”, Linck is convinced. The machining centre could also be an additional line in chipper canter plants. The capacity of the main sawline will be increased if small diameter logs are sawn on a separate sawline. For a year, the LINCK technicians have intensely drawn, planned, built and optimised the compact machine centre until the prototype was ready. And it is worth looking at. The key data: 8.70 m overall length from the infeed roller until the last outfeed roller, 2.50 m minimum log length, 8-25 cm small end diameter, 40 cm maximum passage, up to 120 mm cutting depth.

„High-quality technology, high yield, little space requirement – these items were focused when developing the compact machining centre.“

„Conventional“ chipper canter lines operate according to the principle: opening of two faces – turning – opening of the two remaining faces. Both chipper canters produce vertical surfaces on the log. And here is already the key difference to the new compact machine centre: The tools of the first chipper canter were turned by 90°. The combination of log rotation and alignment in one unit and the two chipper canters moving closer together resulted in a reduced overall length. The logs are fed into the infeed system. Two pairs of pivoting rollers take the log, lift it from the conveyor for rotating it according to the optimising result made available by the scanning system. From this moment, the log floats nearly “weightless” in space. This allows an exact alignment and any processing of the log taking into account its possible growth form. Options are a centered straight sawing, diagonal cant alignment and curve sawing. The operator has the choice, however with the support of the line control presenting the best option based on cutting pattern and system configuration.

Held firmly in position . Three units each with a vertical and a horizontal pair of rollers are installed for realisation of the alignment. “The newly developed anti-twist device holds the log firmly and avoids twisting as soon as it enters the chipper canter tool”, explains mechanical engineering manager Eric Schultz when demonstrating the new system. The bottom cutterhead of the first chipper canter unit is stationary and used as support for further processing. Additional feeding and positioning units are arranged between the first and the second machine unit guiding the two-sided cant either straight, diagonally aligned or following the curve through the second chipper canter. When leaving the compact machining centre, the log has a circular sawn surface on all four sides.

Easy accessibility . Although the new machining centre was built in a compact manner, Linck has put emphasis on the possibility of an easy tool change. The distance between the two tool units is about 1 m. The employee can thus easily enter the space for tool change. The lateral centering rollers are connected to a guiding unit and can be moved out of working range. As a benchmark regarding production capacity, Eric Schultz names up to about 300.000 m³ of logs/year – depending on the logs. The machine can be used either as chipper canter unit in a classic LINCK line combined with the machines of the present range of supply, or supplemented with two special machines for profiling and splitting of four-sided cants whose concepts are already existing.

Perfectly suitable. Linck is convinced to have met the needs of the time with the new compact machining centre. “Now we can also perfectly serve medium size sawmills.“