The new sorter top assemblies will be fitted to the existing structural steel frame, offering a faster and more reliable sorting operation and product throughput. Canfor is one of the largest producers of sustainable lumber, pulp and paper and is upgrading its planer mill facility in Graham, North Carolina, USA. The advantage of sling sorters include:Ĭanfor recently ordered 50 new sorter-top sling bay assemblies from USNR. Murray says a sling sorter can be less capital intensive than bin sorters because it contains less structural steel than a typical bin sorter design. It can reach speeds up to 120 lugs/min and handles poor quality (twisted, bowed) lumber or boards well.
The J-Bar sorter design is robust and reliable. The drag-chain sorter can achieve up to 160 lugs/min in wetmill applications and 250 lugs/min in planer/dry mills. It handles poor quality (twisted, bowed) lumber well. The chain lies flat on the boards, facilitating stable sorting and control during sudden stops. The drag-chain sorter is also suitable for high-speed wetmill and planer/dry mill applications. It is capable of up to 160 lugs/min in wetmill applications and 250 lugs/min in planer/dry mills. The pusher lug sorter’s chain cannot leave marks because it does not touch the boards. The pusher-lug design is ideal for high-speed applications and sorting random thickness products. USNR manufactures different sorter tops, including pusher-lug, drag-chain and J-bar sorters. The slings retract, reattach, and the sorting bay is ready for the next load.Ī replacement sling for the USNR lumber sling sorter. One end of the sling is released, and the boards offload and travel along the chains. When ready, the package lowers until it reaches the floor chains. The distance between the top of the package and the sorter remains constant. While the dropping boards fill the sling cradle, the hydraulic let-down system slowly extends the cradle downwards. Nylon straps or slings are suspended transversely to form a “cradle” that catches and supports the boards released by the top-sorter. Murray says a sorter-top sling bay system in the drymill handles premium boards and other high-quality niche products gently. Neil Murray and his company, Pinnacle-SA, supply USNR products in Africa. USNR, the world’s largest supplier of equipment and technologies for the wood processing industry, manufactures a range of wet and drymill lumber handling equipment and systems, including top-loading sling sorters.
The bins are usually filled from the bottom up, increasing the risk of boards breaking and inventory loss. The most common sorting method is to grade boards and direct them to a specific storage area to fall into bins until needed. Unfortunately, the sorting method often damages boards and reduces efficiencies. A USNR sling sorter loaded with premium board products at a mill in Russiaīoard selection and sorting throughout the milling process assists sawmills in selecting cutting patterns and products standards for their market segments and is essential for quality assurance.
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